c3.js.new
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Created: Sat, Aug 24, 17:51

c3.js.new
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	(function (window) {
	'use strict';

	/global define, module, exports, require /

	var c3 = { version: "0.4.10" };

	var c3_chart_fn,
	c3_chart_internal_fn,
	c3_chart_internal_axis_fn;

	function API(owner) {
	this.owner = owner;
	}

	function inherit(base, derived) {

	if (Object.create) {
	derived.prototype = Object.create(base.prototype);
	} else {
	var f = function f() {};
	f.prototype = base.prototype;
	derived.prototype = new f();
	}

	derived.prototype.constructor = derived;

	return derived;
	}

	function Chart(config) {
	var $$ = this.internal = new ChartInternal(this);
	$$.loadConfig(config);
	$$.init();

	// bind "this" to nested API
	(function bindThis(fn, target, argThis) {
	Object.keys(fn).forEach(function (key) {
	target[key] = fn[key].bind(argThis);
	if (Object.keys(fn[key]).length > 0) {
	bindThis(fn[key], target[key], argThis);
	}
	});
	})(c3_chart_fn, this, this);
	}

	function ChartInternal(api) {
	var $$ = this;
	$$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
	$$.api = api;
	$$.config = $$.getDefaultConfig();
	$$.data = {};
	$$.cache = {};
	$$.axes = {};
	}

	c3.generate = function (config) {
	return new Chart(config);
	};

	c3.chart = {
	fn: Chart.prototype,
	internal: {
	fn: ChartInternal.prototype,
	axis: {
	fn: Axis.prototype
	}
	}
	};
	c3_chart_fn = c3.chart.fn;
	c3_chart_internal_fn = c3.chart.internal.fn;
	c3_chart_internal_axis_fn = c3.chart.internal.axis.fn;

	c3_chart_internal_fn.init = function () {
	var $$ = this, config = $$.config;

	$$.initParams();

	if (config.data_url) {
	$$.convertUrlToData(config.data_url, config.data_mimeType, config.data_keys, $$.initWithData);
	}
	else if (config.data_json) {
	$$.initWithData($$.convertJsonToData(config.data_json, config.data_keys));
	}
	else if (config.data_rows) {
	$$.initWithData($$.convertRowsToData(config.data_rows));
	}
	else if (config.data_columns) {
	$$.initWithData($$.convertColumnsToData(config.data_columns));
	}
	else {
	throw Error('url or json or rows or columns is required.');
	}
	};

	c3_chart_internal_fn.initParams = function () {
	var $$ = this, d3 = $$.d3, config = $$.config;

	// MEMO: clipId needs to be unique because it conflicts when multiple charts exist
	$$.clipId = "c3-" + (+new Date()) + '-clip',
	$$.clipIdForXAxis = $$.clipId + '-xaxis',
	$$.clipIdForYAxis = $$.clipId + '-yaxis',
	$$.clipIdForGrid = $$.clipId + '-grid',
	$$.clipIdForSubchart = $$.clipId + '-subchart',
	$$.clipPath = $$.getClipPath($$.clipId),
	$$.clipPathForXAxis = $$.getClipPath($$.clipIdForXAxis),
	$$.clipPathForYAxis = $$.getClipPath($$.clipIdForYAxis);
	$$.clipPathForGrid = $$.getClipPath($$.clipIdForGrid),
	$$.clipPathForSubchart = $$.getClipPath($$.clipIdForSubchart),

	$$.dragStart = null;
	$$.dragging = false;
	$$.flowing = false;
	$$.cancelClick = false;
	$$.mouseover = false;
	$$.transiting = false;

	$$.color = $$.generateColor();
	$$.levelColor = $$.generateLevelColor();

	$$.dataTimeFormat = config.data_xLocaltime ? d3.time.format : d3.time.format.utc;
	$$.axisTimeFormat = config.axis_x_localtime ? d3.time.format : d3.time.format.utc;
	$$.defaultAxisTimeFormat = $$.axisTimeFormat.multi([
	[".%L", function (d) { return d.getMilliseconds(); }],
	[":%S", function (d) { return d.getSeconds(); }],
	["%I:%M", function (d) { return d.getMinutes(); }],
	["%I %p", function (d) { return d.getHours(); }],
	["%-m/%-d", function (d) { return d.getDay() && d.getDate() !== 1; }],
	["%-m/%-d", function (d) { return d.getDate() !== 1; }],
	["%-m/%-d", function (d) { return d.getMonth(); }],
	["%Y/%-m/%-d", function () { return true; }]
	]);

	$$.hiddenTargetIds = [];
	$$.hiddenLegendIds = [];
	$$.focusedTargetIds = [];
	$$.defocusedTargetIds = [];

	$$.xOrient = config.axis_rotated ? "left" : "bottom";
	$$.yOrient = config.axis_rotated ? (config.axis_y_inner ? "top" : "bottom") : (config.axis_y_inner ? "right" : "left");
	$$.y2Orient = config.axis_rotated ? (config.axis_y2_inner ? "bottom" : "top") : (config.axis_y2_inner ? "left" : "right");
	$$.subXOrient = config.axis_rotated ? "left" : "bottom";

	$$.isLegendRight = config.legend_position === 'right';
	$$.isLegendInset = config.legend_position === 'inset';
	$$.isLegendTop = config.legend_inset_anchor === 'top-left' \|\| config.legend_inset_anchor === 'top-right';
	$$.isLegendLeft = config.legend_inset_anchor === 'top-left' \|\| config.legend_inset_anchor === 'bottom-left';
	$$.legendStep = 0;
	$$.legendItemWidth = 0;
	$$.legendItemHeight = 0;

	$$.currentMaxTickWidths = {
	x: 0,
	y: 0,
	y2: 0
	};

	$$.rotated_padding_left = 30;
	$$.rotated_padding_right = config.axis_rotated && !config.axis_x_show ? 0 : 30;
	$$.rotated_padding_top = 5;

	$$.withoutFadeIn = {};

	$$.intervalForObserveInserted = undefined;

	$$.axes.subx = d3.selectAll([]); // needs when excluding subchart.js
	};

	c3_chart_internal_fn.initChartElements = function () {
	if (this.initBar) { this.initBar(); }
	if (this.initLine) { this.initLine(); }
	if (this.initArc) { this.initArc(); }
	if (this.initGauge) { this.initGauge(); }
	if (this.initText) { this.initText(); }
	};

	c3_chart_internal_fn.initWithData = function (data) {
	var $$ = this, d3 = $$.d3, config = $$.config;
	var defs, main, binding = true;

	$$.axis = new Axis($$);

	if ($$.initPie) { $$.initPie(); }
	if ($$.initBrush) { $$.initBrush(); }
	if ($$.initZoom) { $$.initZoom(); }

	if (!config.bindto) {
	$$.selectChart = d3.selectAll([]);
	}
	else if (typeof config.bindto.node === 'function') {
	$$.selectChart = config.bindto;
	}
	else {
	$$.selectChart = d3.select(config.bindto);
	}
	if ($$.selectChart.empty()) {
	$$.selectChart = d3.select(document.createElement('div')).style('opacity', 0);
	$$.observeInserted($$.selectChart);
	binding = false;
	}
	$$.selectChart.html("").classed("c3", true);

	// Init data as targets
	$$.data.xs = {};
	$$.data.targets = $$.convertDataToTargets(data);

	if (config.data_filter) {
	$$.data.targets = $$.data.targets.filter(config.data_filter);
	}

	// Set targets to hide if needed
	if (config.data_hide) {
	$$.addHiddenTargetIds(config.data_hide === true ? $$.mapToIds($$.data.targets) : config.data_hide);
	}
	if (config.legend_hide) {
	$$.addHiddenLegendIds(config.legend_hide === true ? $$.mapToIds($$.data.targets) : config.legend_hide);
	}

	// when gauge, hide legend // TODO: fix
	if ($$.hasType('gauge')) {
	config.legend_show = false;
	}

	// Init sizes and scales
	$$.updateSizes();
	$$.updateScales();

	// Set domains for each scale
	$$.x.domain(d3.extent($$.getXDomain($$.data.targets)));
	$$.y.domain($$.getYDomain($$.data.targets, 'y'));
	$$.y2.domain($$.getYDomain($$.data.targets, 'y2'));
	$$.subX.domain($$.x.domain());
	$$.subY.domain($$.y.domain());
	$$.subY2.domain($$.y2.domain());

	// Save original x domain for zoom update
	$$.orgXDomain = $$.x.domain();

	// Set initialized scales to brush and zoom
	if ($$.brush) { $$.brush.scale($$.subX); }
	if (config.zoom_enabled) { $$.zoom.scale($$.x); }

	/-- Basic Elements --/

	// Define svgs
	$$.svg = $$.selectChart.append("svg")
	.style("overflow", "hidden")
	.on('mouseenter', function () { return config.onmouseover.call($$); })
	.on('mouseleave', function () { return config.onmouseout.call($$); });

	// Define defs
	defs = $$.svg.append("defs");
	$$.clipChart = $$.appendClip(defs, $$.clipId);
	$$.clipXAxis = $$.appendClip(defs, $$.clipIdForXAxis);
	$$.clipYAxis = $$.appendClip(defs, $$.clipIdForYAxis);
	$$.clipGrid = $$.appendClip(defs, $$.clipIdForGrid);
	$$.clipSubchart = $$.appendClip(defs, $$.clipIdForSubchart);
	$$.updateSvgSize();

	// Define regions
	main = $$.main = $$.svg.append("g").attr("transform", $$.getTranslate('main'));

	if ($$.initSubchart) { $$.initSubchart(); }
	if ($$.initTooltip) { $$.initTooltip(); }
	if ($$.initLegend) { $$.initLegend(); }

	/-- Main Region --/

	// text when empty
	main.append("text")
	.attr("class", CLASS.text + ' ' + CLASS.empty)
	.attr("text-anchor", "middle") // horizontal centering of text at x position in all browsers.
	.attr("dominant-baseline", "middle"); // vertical centering of text at y position in all browsers, except IE.

	// Regions
	$$.initRegion();

	// Grids
	$$.initGrid();

	// Define g for chart area
	main.append('g')
	.attr("clip-path", $$.clipPath)
	.attr('class', CLASS.chart);

	// Grid lines
	if (config.grid_lines_front) { $$.initGridLines(); }

	// Cover whole with rects for events
	$$.initEventRect();

	// Define g for chart
	$$.initChartElements();

	// if zoom privileged, insert rect to forefront
	// TODO: is this needed?
	main.insert('rect', config.zoom_privileged ? null : 'g.' + CLASS.regions)
	.attr('class', CLASS.zoomRect)
	.attr('width', $$.width)
	.attr('height', $$.height)
	.style('opacity', 0)
	.on("dblclick.zoom", null);

	// Set default extent if defined
	if (config.axis_x_extent) { $$.brush.extent($$.getDefaultExtent()); }

	// Add Axis
	$$.axis.init();

	// Set targets
	$$.updateTargets($$.data.targets);

	// Draw with targets
	if (binding) {
	$$.updateDimension();
	$$.config.oninit.call($$);
	$$.redraw({
	withTransition: false,
	withTransform: true,
	withUpdateXDomain: true,
	withUpdateOrgXDomain: true,
	withTransitionForAxis: false
	});
	}

	// Bind resize event
	if (window.onresize == null) {
	window.onresize = $$.generateResize();
	}
	if (window.onresize.add) {
	window.onresize.add(function () {
	config.onresize.call($$);
	});
	window.onresize.add(function () {
	$$.api.flush();
	});
	window.onresize.add(function () {
	config.onresized.call($$);
	});
	}

	// export element of the chart
	$$.api.element = $$.selectChart.node();
	};

	c3_chart_internal_fn.smoothLines = function (el, type) {
	var $$ = this;
	if (type === 'grid') {
	el.each(function () {
	var g = $$.d3.select(this),
	x1 = g.attr('x1'),
	x2 = g.attr('x2'),
	y1 = g.attr('y1'),
	y2 = g.attr('y2');
	g.attr({
	'x1': Math.ceil(x1),
	'x2': Math.ceil(x2),
	'y1': Math.ceil(y1),
	'y2': Math.ceil(y2)
	});
	});
	}
	};


	c3_chart_internal_fn.updateSizes = function () {
	var $$ = this, config = $$.config;
	var legendHeight = $$.legend ? $$.getLegendHeight() : 0,
	legendWidth = $$.legend ? $$.getLegendWidth() : 0,
	legendHeightForBottom = $$.isLegendRight \|\| $$.isLegendInset ? 0 : legendHeight,
	hasArc = $$.hasArcType(),
	xAxisHeight = config.axis_rotated \|\| hasArc ? 0 : $$.getHorizontalAxisHeight('x'),
	subchartHeight = config.subchart_show && !hasArc ? (config.subchart_size_height + xAxisHeight) : 0;

	$$.currentWidth = $$.getCurrentWidth();
	$$.currentHeight = $$.getCurrentHeight();

	// for main
	$$.margin = config.axis_rotated ? {
	top: $$.getHorizontalAxisHeight('y2') + $$.getCurrentPaddingTop(),
	right: hasArc ? 0 : $$.getCurrentPaddingRight(),
	bottom: $$.getHorizontalAxisHeight('y') + legendHeightForBottom + $$.getCurrentPaddingBottom(),
	left: subchartHeight + (hasArc ? 0 : $$.getCurrentPaddingLeft())
	} : {
	top: 4 + $$.getCurrentPaddingTop(), // for top tick text
	right: hasArc ? 0 : $$.getCurrentPaddingRight(),
	bottom: xAxisHeight + subchartHeight + legendHeightForBottom + $$.getCurrentPaddingBottom(),
	left: hasArc ? 0 : $$.getCurrentPaddingLeft()
	};

	// for subchart
	$$.margin2 = config.axis_rotated ? {
	top: $$.margin.top,
	right: NaN,
	bottom: 20 + legendHeightForBottom,
	left: $$.rotated_padding_left
	} : {
	top: $$.currentHeight - subchartHeight - legendHeightForBottom,
	right: NaN,
	bottom: xAxisHeight + legendHeightForBottom,
	left: $$.margin.left
	};

	// for legend
	$$.margin3 = {
	top: 0,
	right: NaN,
	bottom: 0,
	left: 0
	};
	if ($$.updateSizeForLegend) { $$.updateSizeForLegend(legendHeight, legendWidth); }

	$$.width = $$.currentWidth - $$.margin.left - $$.margin.right;
	$$.height = $$.currentHeight - $$.margin.top - $$.margin.bottom;
	if ($$.width < 0) { $$.width = 0; }
	if ($$.height < 0) { $$.height = 0; }

	$$.width2 = config.axis_rotated ? $$.margin.left - $$.rotated_padding_left - $$.rotated_padding_right : $$.width;
	$$.height2 = config.axis_rotated ? $$.height : $$.currentHeight - $$.margin2.top - $$.margin2.bottom;
	if ($$.width2 < 0) { $$.width2 = 0; }
	if ($$.height2 < 0) { $$.height2 = 0; }

	// for arc
	$$.arcWidth = $$.width - ($$.isLegendRight ? legendWidth + 10 : 0);
	$$.arcHeight = $$.height - ($$.isLegendRight ? 0 : 10);
	if ($$.hasType('gauge')) {
	$$.arcHeight += $$.height - $$.getGaugeLabelHeight();
	}
	if ($$.updateRadius) { $$.updateRadius(); }

	if ($$.isLegendRight && hasArc) {
	$$.margin3.left = $$.arcWidth / 2 + $$.radiusExpanded * 1.1;
	}
	};

	c3_chart_internal_fn.updateTargets = function (targets) {
	var $$ = this;

	/-- Main --/

	//-- Text --//
	$$.updateTargetsForText(targets);

	//-- Bar --//
	$$.updateTargetsForBar(targets);

	//-- Line --//
	$$.updateTargetsForLine(targets);

	//-- Arc --//
	if ($$.hasArcType() && $$.updateTargetsForArc) { $$.updateTargetsForArc(targets); }

	/-- Sub --/

	if ($$.updateTargetsForSubchart) { $$.updateTargetsForSubchart(targets); }

	// Fade-in each chart
	$$.showTargets();
	};
	c3_chart_internal_fn.showTargets = function () {
	var $$ = this;
	$$.svg.selectAll('.' + CLASS.target).filter(function (d) { return $$.isTargetToShow(d.id); })
	.transition().duration($$.config.transition_duration)
	.style("opacity", 1);
	};

	c3_chart_internal_fn.redraw = function (options, transitions) {
	var $$ = this, main = $$.main, d3 = $$.d3, config = $$.config;
	var areaIndices = $$.getShapeIndices($$.isAreaType), barIndices = $$.getShapeIndices($$.isBarType), lineIndices = $$.getShapeIndices($$.isLineType);
	var withY, withSubchart, withTransition, withTransitionForExit, withTransitionForAxis,
	withTransform, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain, withLegend,
	withEventRect, withDimension, withUpdateXAxis;
	var hideAxis = $$.hasArcType();
	var drawArea, drawBar, drawLine, xForText, yForText;
	var duration, durationForExit, durationForAxis;
	var waitForDraw, flow;
	var targetsToShow = $$.filterTargetsToShow($$.data.targets), tickValues, i, intervalForCulling, xDomainForZoom;
	var xv = $$.xv.bind($$), cx, cy;

	options = options \|\| {};
	withY = getOption(options, "withY", true);
	withSubchart = getOption(options, "withSubchart", true);
	withTransition = getOption(options, "withTransition", true);
	withTransform = getOption(options, "withTransform", false);
	withUpdateXDomain = getOption(options, "withUpdateXDomain", false);
	withUpdateOrgXDomain = getOption(options, "withUpdateOrgXDomain", false);
	withTrimXDomain = getOption(options, "withTrimXDomain", true);
	withUpdateXAxis = getOption(options, "withUpdateXAxis", withUpdateXDomain);
	withLegend = getOption(options, "withLegend", false);
	withEventRect = getOption(options, "withEventRect", true);
	withDimension = getOption(options, "withDimension", true);
	withTransitionForExit = getOption(options, "withTransitionForExit", withTransition);
	withTransitionForAxis = getOption(options, "withTransitionForAxis", withTransition);

	duration = withTransition ? config.transition_duration : 0;
	durationForExit = withTransitionForExit ? duration : 0;
	durationForAxis = withTransitionForAxis ? duration : 0;

	transitions = transitions \|\| $$.axis.generateTransitions(durationForAxis);

	// update legend and transform each g
	if (withLegend && config.legend_show) {
	$$.updateLegend($$.mapToIds($$.data.targets), options, transitions);
	} else if (withDimension) {
	// need to update dimension (e.g. axis.y.tick.values) because y tick values should change
	// no need to update axis in it because they will be updated in redraw()
	$$.updateDimension(true);
	}

	// MEMO: needed for grids calculation
	if ($$.isCategorized() && targetsToShow.length === 0) {
	$$.x.domain([0, $$.axes.x.selectAll('.tick').size()]);
	}

	if (targetsToShow.length) {
	$$.updateXDomain(targetsToShow, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain);
	if (!config.axis_x_tick_values) {
	tickValues = $$.axis.updateXAxisTickValues(targetsToShow);
	}
	} else {
	$$.xAxis.tickValues([]);
	$$.subXAxis.tickValues([]);
	}

	if (config.zoom_rescale && !options.flow) {
	xDomainForZoom = $$.x.orgDomain();
	}

	$$.y.domain($$.getYDomain(targetsToShow, 'y', xDomainForZoom));
	$$.y2.domain($$.getYDomain(targetsToShow, 'y2', xDomainForZoom));

	if (!config.axis_y_tick_values && config.axis_y_tick_count) {
	$$.yAxis.tickValues($$.axis.generateTickValues($$.y.domain(), config.axis_y_tick_count));
	}
	if (!config.axis_y2_tick_values && config.axis_y2_tick_count) {
	$$.y2Axis.tickValues($$.axis.generateTickValues($$.y2.domain(), config.axis_y2_tick_count));
	}

	// axes
	$$.axis.redraw(transitions, hideAxis);

	// Update axis label
	$$.axis.updateLabels(withTransition);

	// show/hide if manual culling needed
	if ((withUpdateXDomain \|\| withUpdateXAxis) && targetsToShow.length) {
	if (config.axis_x_tick_culling && tickValues) {
	for (i = 1; i < tickValues.length; i++) {
	if (tickValues.length / i < config.axis_x_tick_culling_max) {
	intervalForCulling = i;
	break;
	}
	}
	$$.svg.selectAll('.' + CLASS.axisX + ' .tick text').each(function (e) {
	var index = tickValues.indexOf(e);
	if (index >= 0) {
	d3.select(this).style('display', index % intervalForCulling ? 'none' : 'block');
	}
	});
	} else {
	$$.svg.selectAll('.' + CLASS.axisX + ' .tick text').style('display', 'block');
	}
	}

	// setup drawer - MEMO: these must be called after axis updated
	drawArea = $$.generateDrawArea ? $$.generateDrawArea(areaIndices, false) : undefined;
	drawBar = $$.generateDrawBar ? $$.generateDrawBar(barIndices) : undefined;
	drawLine = $$.generateDrawLine ? $$.generateDrawLine(lineIndices, false) : undefined;
	xForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, true);
	yForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, false);

	// Update sub domain
	if (withY) {
	$$.subY.domain($$.getYDomain(targetsToShow, 'y'));
	$$.subY2.domain($$.getYDomain(targetsToShow, 'y2'));
	}

	// tooltip
	$$.tooltip.style("display", "none");

	// xgrid focus
	$$.updateXgridFocus();

	// Data empty label positioning and text.
	main.select("text." + CLASS.text + '.' + CLASS.empty)
	.attr("x", $$.width / 2)
	.attr("y", $$.height / 2)
	.text(config.data_empty_label_text)
	.transition()
	.style('opacity', targetsToShow.length ? 0 : 1);

	// grid
	$$.updateGrid(duration);

	// rect for regions
	$$.updateRegion(duration);

	// bars
	$$.updateBar(durationForExit);

	// lines, areas and cricles
	$$.updateLine(durationForExit);
	$$.updateArea(durationForExit);
	$$.updateCircle();

	// text
	if ($$.hasDataLabel()) {
	$$.updateText(durationForExit);
	}

	// arc
	if ($$.redrawArc) { $$.redrawArc(duration, durationForExit, withTransform); }

	// subchart
	if ($$.redrawSubchart) {
	$$.redrawSubchart(withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices);
	}

	// circles for select
	main.selectAll('.' + CLASS.selectedCircles)
	.filter($$.isBarType.bind($$))
	.selectAll('circle')
	.remove();

	// event rects will redrawn when flow called
	if (config.interaction_enabled && !options.flow && withEventRect) {
	$$.redrawEventRect();
	if ($$.updateZoom) { $$.updateZoom(); }
	}

	// update circleY based on updated parameters
	$$.updateCircleY();

	// generate circle x/y functions depending on updated params
	cx = ($$.config.axis_rotated ? $$.circleY : $$.circleX).bind($$);
	cy = ($$.config.axis_rotated ? $$.circleX : $$.circleY).bind($$);

	if (options.flow) {
	flow = $$.generateFlow({
	targets: targetsToShow,
	flow: options.flow,
	duration: options.flow.duration,
	drawBar: drawBar,
	drawLine: drawLine,
	drawArea: drawArea,
	cx: cx,
	cy: cy,
	xv: xv,
	xForText: xForText,
	yForText: yForText
	});
	}

	if ((duration \|\| flow) && $$.isTabVisible()) { // Only use transition if tab visible. See #938.
	// transition should be derived from one transition
	d3.transition().duration(duration).each(function () {
	var transitionsToWait = [];

	// redraw and gather transitions
	[
	$$.redrawBar(drawBar, true),
	$$.redrawLine(drawLine, true),
	$$.redrawArea(drawArea, true),
	$$.redrawCircle(cx, cy, true),
	$$.redrawText(xForText, yForText, options.flow, true),
	$$.redrawRegion(true),
	$$.redrawGrid(true),
	].forEach(function (transitions) {
	transitions.forEach(function (transition) {
	transitionsToWait.push(transition);
	});
	});

	// Wait for end of transitions to call flow and onrendered callback
	waitForDraw = $$.generateWait();
	transitionsToWait.forEach(function (t) {
	waitForDraw.add(t);
	});
	})
	.call(waitForDraw, function () {
	if (flow) {
	flow();
	}
	if (config.onrendered) {
	config.onrendered.call($$);
	}
	});
	}
	else {
	$$.redrawBar(drawBar);
	$$.redrawLine(drawLine);
	$$.redrawArea(drawArea);
	$$.redrawCircle(cx, cy);
	$$.redrawText(xForText, yForText, options.flow);
	$$.redrawRegion();
	$$.redrawGrid();
	if (config.onrendered) {
	config.onrendered.call($$);
	}
	}

	// update fadein condition
	$$.mapToIds($$.data.targets).forEach(function (id) {
	$$.withoutFadeIn[id] = true;
	});
	};

	c3_chart_internal_fn.updateAndRedraw = function (options) {
	var $$ = this, config = $$.config, transitions;
	options = options \|\| {};
	// same with redraw
	options.withTransition = getOption(options, "withTransition", true);
	options.withTransform = getOption(options, "withTransform", false);
	options.withLegend = getOption(options, "withLegend", false);
	// NOT same with redraw
	options.withUpdateXDomain = true;
	options.withUpdateOrgXDomain = true;
	options.withTransitionForExit = false;
	options.withTransitionForTransform = getOption(options, "withTransitionForTransform", options.withTransition);
	// MEMO: this needs to be called before updateLegend and it means this ALWAYS needs to be called)
	$$.updateSizes();
	// MEMO: called in updateLegend in redraw if withLegend
	if (!(options.withLegend && config.legend_show)) {
	transitions = $$.axis.generateTransitions(options.withTransitionForAxis ? config.transition_duration : 0);
	// Update scales
	$$.updateScales();
	$$.updateSvgSize();
	// Update g positions
	$$.transformAll(options.withTransitionForTransform, transitions);
	}
	// Draw with new sizes & scales
	$$.redraw(options, transitions);
	};
	c3_chart_internal_fn.redrawWithoutRescale = function () {
	this.redraw({
	withY: false,
	withSubchart: false,
	withEventRect: false,
	withTransitionForAxis: false
	});
	};

	c3_chart_internal_fn.isTimeSeries = function () {
	return this.config.axis_x_type === 'timeseries';
	};
	c3_chart_internal_fn.isCategorized = function () {
	return this.config.axis_x_type.indexOf('categor') >= 0;
	};
	c3_chart_internal_fn.isCustomX = function () {
	var $$ = this, config = $$.config;
	return !$$.isTimeSeries() && (config.data_x \|\| notEmpty(config.data_xs));
	};

	c3_chart_internal_fn.isTimeSeriesY = function () {
	return this.config.axis_y_type === 'timeseries';
	};

	c3_chart_internal_fn.getTranslate = function (target) {
	var $$ = this, config = $$.config, x, y;
	if (target === 'main') {
	x = asHalfPixel($$.margin.left);
	y = asHalfPixel($$.margin.top);
	} else if (target === 'context') {
	x = asHalfPixel($$.margin2.left);
	y = asHalfPixel($$.margin2.top);
	} else if (target === 'legend') {
	x = $$.margin3.left;
	y = $$.margin3.top;
	} else if (target === 'x') {
	x = 0;
	y = config.axis_rotated ? 0 : $$.height;
	} else if (target === 'y') {
	x = 0;
	y = config.axis_rotated ? $$.height : 0;
	} else if (target === 'y2') {
	x = config.axis_rotated ? 0 : $$.width;
	y = config.axis_rotated ? 1 : 0;
	} else if (target === 'subx') {
	x = 0;
	y = config.axis_rotated ? 0 : $$.height2;
	} else if (target === 'arc') {
	x = $$.arcWidth / 2;
	y = $$.arcHeight / 2;
	}
	return "translate(" + x + "," + y + ")";
	};
	c3_chart_internal_fn.initialOpacity = function (d) {
	return d.value !== null && this.withoutFadeIn[d.id] ? 1 : 0;
	};
	c3_chart_internal_fn.initialOpacityForCircle = function (d) {
	return d.value !== null && this.withoutFadeIn[d.id] ? this.opacityForCircle(d) : 0;
	};
	c3_chart_internal_fn.opacityForCircle = function (d) {
	var opacity = this.config.point_show ? 1 : 0;
	return isValue(d.value) ? (this.isScatterType(d) ? 0.5 : opacity) : 0;
	};
	c3_chart_internal_fn.opacityForText = function () {
	return this.hasDataLabel() ? 1 : 0;
	};
	c3_chart_internal_fn.xx = function (d) {
	return d ? this.x(d.x) : null;
	};
	c3_chart_internal_fn.xv = function (d) {
	var $$ = this, value = d.value;
	if ($$.isTimeSeries()) {
	value = $$.parseDate(d.value);
	}
	else if ($$.isCategorized() && typeof d.value === 'string') {
	value = $$.config.axis_x_categories.indexOf(d.value);
	}
	return Math.ceil($$.x(value));
	};
	c3_chart_internal_fn.yv = function (d) {
	var $$ = this,
	yScale = d.axis && d.axis === 'y2' ? $$.y2 : $$.y;
	return Math.ceil(yScale(d.value));
	};
	c3_chart_internal_fn.subxx = function (d) {
	return d ? this.subX(d.x) : null;
	};

	c3_chart_internal_fn.transformMain = function (withTransition, transitions) {
	var $$ = this,
	xAxis, yAxis, y2Axis;
	if (transitions && transitions.axisX) {
	xAxis = transitions.axisX;
	} else {
	xAxis = $$.main.select('.' + CLASS.axisX);
	if (withTransition) { xAxis = xAxis.transition(); }
	}
	if (transitions && transitions.axisY) {
	yAxis = transitions.axisY;
	} else {
	yAxis = $$.main.select('.' + CLASS.axisY);
	if (withTransition) { yAxis = yAxis.transition(); }
	}
	if (transitions && transitions.axisY2) {
	y2Axis = transitions.axisY2;
	} else {
	y2Axis = $$.main.select('.' + CLASS.axisY2);
	if (withTransition) { y2Axis = y2Axis.transition(); }
	}
	(withTransition ? $$.main.transition() : $$.main).attr("transform", $$.getTranslate('main'));
	xAxis.attr("transform", $$.getTranslate('x'));
	yAxis.attr("transform", $$.getTranslate('y'));
	y2Axis.attr("transform", $$.getTranslate('y2'));
	$$.main.select('.' + CLASS.chartArcs).attr("transform", $$.getTranslate('arc'));
	};
	c3_chart_internal_fn.transformAll = function (withTransition, transitions) {
	var $$ = this;
	$$.transformMain(withTransition, transitions);
	if ($$.config.subchart_show) { $$.transformContext(withTransition, transitions); }
	if ($$.legend) { $$.transformLegend(withTransition); }
	};

	c3_chart_internal_fn.updateSvgSize = function () {
	var $$ = this,
	brush = $$.svg.select(".c3-brush .background");
	$$.svg.attr('width', $$.currentWidth).attr('height', $$.currentHeight);
	$$.svg.selectAll(['#' + $$.clipId, '#' + $$.clipIdForGrid]).select('rect')
	.attr('width', $$.width)
	.attr('height', $$.height);
	$$.svg.select('#' + $$.clipIdForXAxis).select('rect')
	.attr('x', $$.getXAxisClipX.bind($$))
	.attr('y', $$.getXAxisClipY.bind($$))
	.attr('width', $$.getXAxisClipWidth.bind($$))
	.attr('height', $$.getXAxisClipHeight.bind($$));
	$$.svg.select('#' + $$.clipIdForYAxis).select('rect')
	.attr('x', $$.getYAxisClipX.bind($$))
	.attr('y', $$.getYAxisClipY.bind($$))
	.attr('width', $$.getYAxisClipWidth.bind($$))
	.attr('height', $$.getYAxisClipHeight.bind($$));
	$$.svg.select('#' + $$.clipIdForSubchart).select('rect')
	.attr('width', $$.width)
	.attr('height', brush.size() ? brush.attr('height') : 0);
	$$.svg.select('.' + CLASS.zoomRect)
	.attr('width', $$.width)
	.attr('height', $$.height);
	// MEMO: parent div's height will be bigger than svg when <!DOCTYPE html>
	$$.selectChart.style('max-height', $$.currentHeight + "px");
	};


	c3_chart_internal_fn.updateDimension = function (withoutAxis) {
	var $$ = this;
	if (!withoutAxis) {
	if ($$.config.axis_rotated) {
	$$.axes.x.call($$.xAxis);
	$$.axes.subx.call($$.subXAxis);
	} else {
	$$.axes.y.call($$.yAxis);
	$$.axes.y2.call($$.y2Axis);
	}
	}
	$$.updateSizes();
	$$.updateScales();
	$$.updateSvgSize();
	$$.transformAll(false);
	};

	c3_chart_internal_fn.observeInserted = function (selection) {
	var $$ = this, observer;
	if (typeof MutationObserver === 'undefined') {
	window.console.error("MutationObserver not defined.");
	return;
	}
	observer= new MutationObserver(function (mutations) {
	mutations.forEach(function (mutation) {
	if (mutation.type === 'childList' && mutation.previousSibling) {
	observer.disconnect();
	// need to wait for completion of load because size calculation requires the actual sizes determined after that completion
	$$.intervalForObserveInserted = window.setInterval(function () {
	// parentNode will NOT be null when completed
	if (selection.node().parentNode) {
	window.clearInterval($$.intervalForObserveInserted);
	$$.updateDimension();
	$$.config.oninit.call($$);
	$$.redraw({
	withTransform: true,
	withUpdateXDomain: true,
	withUpdateOrgXDomain: true,
	withTransition: false,
	withTransitionForTransform: false,
	withLegend: true
	});
	selection.transition().style('opacity', 1);
	}
	}, 10);
	}
	});
	});
	observer.observe(selection.node(), {attributes: true, childList: true, characterData: true});
	};


	c3_chart_internal_fn.generateResize = function () {
	var resizeFunctions = [];
	function callResizeFunctions() {
	resizeFunctions.forEach(function (f) {
	f();
	});
	}
	callResizeFunctions.add = function (f) {
	resizeFunctions.push(f);
	};
	return callResizeFunctions;
	};

	c3_chart_internal_fn.endall = function (transition, callback) {
	var n = 0;
	transition
	.each(function () { ++n; })
	.each("end", function () {
	if (!--n) { callback.apply(this, arguments); }
	});
	};
	c3_chart_internal_fn.generateWait = function () {
	var transitionsToWait = [],
	f = function (transition, callback) {
	var timer = setInterval(function () {
	var done = 0;
	transitionsToWait.forEach(function (t) {
	if (t.empty()) {
	done += 1;
	return;
	}
	try {
	t.transition();
	} catch (e) {
	done += 1;
	}
	});
	if (done === transitionsToWait.length) {
	clearInterval(timer);
	if (callback) { callback(); }
	}
	}, 10);
	};
	f.add = function (transition) {
	transitionsToWait.push(transition);
	};
	return f;
	};

	c3_chart_internal_fn.parseDate = function (date) {
	var $$ = this, parsedDate;
	if (date instanceof Date) {
	parsedDate = date;
	} else if (typeof date === 'string') {
	parsedDate = $$.dataTimeFormat($$.config.data_xFormat).parse(date);
	} else if (typeof date === 'number' \|\| !isNaN(date)) {
	parsedDate = new Date(+date);
	}
	if (!parsedDate \|\| isNaN(+parsedDate)) {
	window.console.error("Failed to parse x '" + date + "' to Date object");
	}
	return parsedDate;
	};

	c3_chart_internal_fn.isTabVisible = function () {
	var hidden;
	if (typeof document.hidden !== "undefined") { // Opera 12.10 and Firefox 18 and later support
	hidden = "hidden";
	} else if (typeof document.mozHidden !== "undefined") {
	hidden = "mozHidden";
	} else if (typeof document.msHidden !== "undefined") {
	hidden = "msHidden";
	} else if (typeof document.webkitHidden !== "undefined") {
	hidden = "webkitHidden";
	}

	return document[hidden] ? false : true;
	};

	c3_chart_internal_fn.getDefaultConfig = function () {
	var config = {
	bindto: '#chart',
	size_width: undefined,
	size_height: undefined,
	padding_left: undefined,
	padding_right: undefined,
	padding_top: undefined,
	padding_bottom: undefined,
	zoom_enabled: false,
	zoom_extent: undefined,
	zoom_privileged: false,
	zoom_rescale: false,
	zoom_onzoom: function () {},
	zoom_onzoomstart: function () {},
	zoom_onzoomend: function () {},
	interaction_enabled: true,
	onmouseover: function () {},
	onmouseout: function () {},
	onresize: function () {},
	onresized: function () {},
	oninit: function () {},
	onrendered: function () {},
	transition_duration: 350,
	data_x: undefined,
	data_xs: {},
	data_xFormat: '%Y-%m-%d',
	data_xLocaltime: true,
	data_xSort: true,
	data_idConverter: function (id) { return id; },
	data_names: {},
	data_classes: {},
	data_groups: [],
	data_axes: {},
	data_type: undefined,
	data_types: {},
	data_labels: {},
	data_order: 'desc',
	data_regions: {},
	data_color: undefined,
	data_colors: {},
	data_hide: false,
	data_filter: undefined,
	data_selection_enabled: false,
	data_selection_grouped: false,
	data_selection_isselectable: function () { return true; },
	data_selection_multiple: true,
	data_selection_draggable: false,
	data_onclick: function () {},
	data_onmouseover: function () {},
	data_onmouseout: function () {},
	data_onselected: function () {},
	data_onunselected: function () {},
	data_url: undefined,
	data_json: undefined,
	data_rows: undefined,
	data_columns: undefined,
	data_mimeType: undefined,
	data_keys: undefined,
	// configuration for no plot-able data supplied.
	data_empty_label_text: "",
	// subchart
	subchart_show: false,
	subchart_size_height: 60,
	subchart_onbrush: function () {},
	// color
	color_pattern: [],
	color_threshold: {},
	// legend
	legend_show: true,
	legend_hide: false,
	legend_position: 'bottom',
	legend_inset_anchor: 'top-left',
	legend_inset_x: 10,
	legend_inset_y: 0,
	legend_inset_step: undefined,
	legend_item_onclick: undefined,
	legend_item_onmouseover: undefined,
	legend_item_onmouseout: undefined,
	legend_equally: false,
	// axis
	axis_rotated: false,
	axis_x_show: true,
	axis_x_type: 'indexed',
	axis_x_localtime: true,
	axis_x_categories: [],
	axis_x_tick_centered: false,
	axis_x_tick_format: undefined,
	axis_x_tick_culling: {},
	axis_x_tick_culling_max: 10,
	axis_x_tick_count: undefined,
	axis_x_tick_fit: true,
	axis_x_tick_values: null,
	axis_x_tick_rotate: 0,
	axis_x_tick_outer: true,
	axis_x_tick_multiline: true,
	axis_x_tick_width: null,
	axis_x_max: undefined,
	axis_x_min: undefined,
	axis_x_padding: {},
	axis_x_height: undefined,
	axis_x_extent: undefined,
	axis_x_label: {},
	axis_y_show: true,
	axis_y_type: undefined,
	axis_y_max: undefined,
	axis_y_min: undefined,
	axis_y_inverted: false,
	axis_y_center: undefined,
	axis_y_inner: undefined,
	axis_y_label: {},
	axis_y_tick_format: undefined,
	axis_y_tick_outer: true,
	axis_y_tick_values: null,
	axis_y_tick_count: undefined,
	axis_y_tick_time_value: undefined,
	axis_y_tick_time_interval: undefined,
	axis_y_padding: {},
	axis_y_default: undefined,
	axis_y2_show: false,
	axis_y2_max: undefined,
	axis_y2_min: undefined,
	axis_y2_inverted: false,
	axis_y2_center: undefined,
	axis_y2_inner: undefined,
	axis_y2_label: {},
	axis_y2_tick_format: undefined,
	axis_y2_tick_outer: true,
	axis_y2_tick_values: null,
	axis_y2_tick_count: undefined,
	axis_y2_padding: {},
	axis_y2_default: undefined,
	// grid
	grid_x_show: false,
	grid_x_type: 'tick',
	grid_x_lines: [],
	grid_y_show: false,
	// not used
	// grid_y_type: 'tick',
	grid_y_lines: [],
	grid_y_ticks: 10,
	grid_focus_show: true,
	grid_lines_front: true,
	// point - point of each data
	point_show: true,
	point_r: 2.5,
	point_focus_expand_enabled: true,
	point_focus_expand_r: undefined,
	point_select_r: undefined,
	// line
	line_connectNull: false,
	line_step_type: 'step',
	// bar
	bar_width: undefined,
	bar_width_ratio: 0.6,
	bar_width_max: undefined,
	bar_zerobased: true,
	// area
	area_zerobased: true,
	// pie
	pie_label_show: true,
	pie_label_format: undefined,
	pie_label_threshold: 0.05,
	pie_expand: true,
	// gauge
	gauge_label_show: true,
	gauge_label_format: undefined,
	gauge_expand: true,
	gauge_min: 0,
	gauge_max: 100,
	gauge_units: undefined,
	gauge_width: undefined,
	// donut
	donut_label_show: true,
	donut_label_format: undefined,
	donut_label_threshold: 0.05,
	donut_width: undefined,
	donut_expand: true,
	donut_title: "",
	// region - region to change style
	regions: [],
	// tooltip - show when mouseover on each data
	tooltip_show: true,
	tooltip_grouped: true,
	tooltip_format_title: undefined,
	tooltip_format_name: undefined,
	tooltip_format_value: undefined,
	tooltip_position: undefined,
	tooltip_contents: function (d, defaultTitleFormat, defaultValueFormat, color) {
	return this.getTooltipContent ? this.getTooltipContent(d, defaultTitleFormat, defaultValueFormat, color) : '';
	},
	tooltip_init_show: false,
	tooltip_init_x: 0,
	tooltip_init_position: {top: '0px', left: '50px'}
	};

	Object.keys(this.additionalConfig).forEach(function (key) {
	config[key] = this.additionalConfig[key];
	}, this);

	return config;
	};
	c3_chart_internal_fn.additionalConfig = {};

	c3_chart_internal_fn.loadConfig = function (config) {
	var this_config = this.config, target, keys, read;
	function find() {
	var key = keys.shift();
	// console.log("key =>", key, ", target =>", target);
	if (key && target && typeof target === 'object' && key in target) {
	target = target[key];
	return find();
	}
	else if (!key) {
	return target;
	}
	else {
	return undefined;
	}
	}
	Object.keys(this_config).forEach(function (key) {
	target = config;
	keys = key.split('_');
	read = find();
	// console.log("CONFIG : ", key, read);
	if (isDefined(read)) {
	this_config[key] = read;
	}
	});
	};

	c3_chart_internal_fn.getScale = function (min, max, forTimeseries) {
	return (forTimeseries ? this.d3.time.scale() : this.d3.scale.linear()).range([min, max]);
	};
	c3_chart_internal_fn.getX = function (min, max, domain, offset) {
	var $$ = this,
	scale = $$.getScale(min, max, $$.isTimeSeries()),
	_scale = domain ? scale.domain(domain) : scale, key;
	// Define customized scale if categorized axis
	if ($$.isCategorized()) {
	offset = offset \|\| function () { return 0; };
	scale = function (d, raw) {
	var v = _scale(d) + offset(d);
	return raw ? v : Math.ceil(v);
	};
	} else {
	scale = function (d, raw) {
	var v = _scale(d);
	return raw ? v : Math.ceil(v);
	};
	}
	// define functions
	for (key in _scale) {
	scale[key] = _scale[key];
	}
	scale.orgDomain = function () {
	return _scale.domain();
	};
	// define custom domain() for categorized axis
	if ($$.isCategorized()) {
	scale.domain = function (domain) {
	if (!arguments.length) {
	domain = this.orgDomain();
	return [domain[0], domain[1] + 1];
	}
	_scale.domain(domain);
	return scale;
	};
	}
	return scale;
	};
	c3_chart_internal_fn.getY = function (min, max, domain) {
	var scale = this.getScale(min, max, this.isTimeSeriesY());
	if (domain) { scale.domain(domain); }
	return scale;
	};
	c3_chart_internal_fn.getYScale = function (id) {
	return this.axis.getId(id) === 'y2' ? this.y2 : this.y;
	};
	c3_chart_internal_fn.getSubYScale = function (id) {
	return this.axis.getId(id) === 'y2' ? this.subY2 : this.subY;
	};
	c3_chart_internal_fn.updateScales = function () {
	var $$ = this, config = $$.config,
	forInit = !$$.x;
	// update edges
	$$.xMin = config.axis_rotated ? 1 : 0;
	$$.xMax = config.axis_rotated ? $$.height : $$.width;
	$$.yMin = config.axis_rotated ? 0 : $$.height;
	$$.yMax = config.axis_rotated ? $$.width : 1;
	$$.subXMin = $$.xMin;
	$$.subXMax = $$.xMax;
	$$.subYMin = config.axis_rotated ? 0 : $$.height2;
	$$.subYMax = config.axis_rotated ? $$.width2 : 1;
	// update scales
	$$.x = $$.getX($$.xMin, $$.xMax, forInit ? undefined : $$.x.orgDomain(), function () { return $$.xAxis.tickOffset(); });
	$$.y = $$.getY($$.yMin, $$.yMax, forInit ? config.axis_y_default : $$.y.domain());
	$$.y2 = $$.getY($$.yMin, $$.yMax, forInit ? config.axis_y2_default : $$.y2.domain());
	$$.subX = $$.getX($$.xMin, $$.xMax, $$.orgXDomain, function (d) { return d % 1 ? 0 : $$.subXAxis.tickOffset(); });
	$$.subY = $$.getY($$.subYMin, $$.subYMax, forInit ? config.axis_y_default : $$.subY.domain());
	$$.subY2 = $$.getY($$.subYMin, $$.subYMax, forInit ? config.axis_y2_default : $$.subY2.domain());
	// update axes
	$$.xAxisTickFormat = $$.axis.getXAxisTickFormat();
	$$.xAxisTickValues = $$.axis.getXAxisTickValues();
	$$.yAxisTickValues = $$.axis.getYAxisTickValues();
	$$.y2AxisTickValues = $$.axis.getY2AxisTickValues();

	$$.xAxis = $$.axis.getXAxis($$.x, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, config.axis_x_tick_outer);
	$$.subXAxis = $$.axis.getXAxis($$.subX, $$.subXOrient, $$.xAxisTickFormat, $$.xAxisTickValues, config.axis_x_tick_outer);
	$$.yAxis = $$.axis.getYAxis($$.y, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, config.axis_y_tick_outer);
	$$.y2Axis = $$.axis.getYAxis($$.y2, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, config.axis_y2_tick_outer);

	// Set initialized scales to brush and zoom
	if (!forInit) {
	if ($$.brush) { $$.brush.scale($$.subX); }
	if (config.zoom_enabled) { $$.zoom.scale($$.x); }
	}
	// update for arc
	if ($$.updateArc) { $$.updateArc(); }
	};

	c3_chart_internal_fn.getYDomainMin = function (targets) {
	var $$ = this, config = $$.config,
	ids = $$.mapToIds(targets), ys = $$.getValuesAsIdKeyed(targets),
	j, k, baseId, idsInGroup, id, hasNegativeValue;
	if (config.data_groups.length > 0) {
	hasNegativeValue = $$.hasNegativeValueInTargets(targets);
	for (j = 0; j < config.data_groups.length; j++) {
	// Determine baseId
	idsInGroup = config.data_groups[j].filter(function (id) { return ids.indexOf(id) >= 0; });
	if (idsInGroup.length === 0) { continue; }
	baseId = idsInGroup[0];
	// Consider negative values
	if (hasNegativeValue && ys[baseId]) {
	ys[baseId].forEach(function (v, i) {
	ys[baseId][i] = v < 0 ? v : 0;
	});
	}
	// Compute min
	for (k = 1; k < idsInGroup.length; k++) {
	id = idsInGroup[k];
	if (! ys[id]) { continue; }
	ys[id].forEach(function (v, i) {
	if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasNegativeValue && +v > 0)) {
	ys[baseId][i] += +v;
	}
	});
	}
	}
	}
	return $$.d3.min(Object.keys(ys).map(function (key) { return $$.d3.min(ys[key]); }));
	};
	c3_chart_internal_fn.getYDomainMax = function (targets) {
	var $$ = this, config = $$.config,
	ids = $$.mapToIds(targets), ys = $$.getValuesAsIdKeyed(targets),
	j, k, baseId, idsInGroup, id, hasPositiveValue;
	if (config.data_groups.length > 0) {
	hasPositiveValue = $$.hasPositiveValueInTargets(targets);
	for (j = 0; j < config.data_groups.length; j++) {
	// Determine baseId
	idsInGroup = config.data_groups[j].filter(function (id) { return ids.indexOf(id) >= 0; });
	if (idsInGroup.length === 0) { continue; }
	baseId = idsInGroup[0];
	// Consider positive values
	if (hasPositiveValue && ys[baseId]) {
	ys[baseId].forEach(function (v, i) {
	ys[baseId][i] = v > 0 ? v : 0;
	});
	}
	// Compute max
	for (k = 1; k < idsInGroup.length; k++) {
	id = idsInGroup[k];
	if (! ys[id]) { continue; }
	ys[id].forEach(function (v, i) {
	if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasPositiveValue && +v < 0)) {
	ys[baseId][i] += +v;
	}
	});
	}
	}
	}
	return $$.d3.max(Object.keys(ys).map(function (key) { return $$.d3.max(ys[key]); }));
	};
	c3_chart_internal_fn.getYDomain = function (targets, axisId, xDomain) {
	var $$ = this, config = $$.config,
	targetsByAxisId = targets.filter(function (t) { return $$.axis.getId(t.id) === axisId; }),
	yTargets = xDomain ? $$.filterByXDomain(targetsByAxisId, xDomain) : targetsByAxisId,
	yMin = axisId === 'y2' ? config.axis_y2_min : config.axis_y_min,
	yMax = axisId === 'y2' ? config.axis_y2_max : config.axis_y_max,
	yDomainMin = $$.getYDomainMin(yTargets),
	yDomainMax = $$.getYDomainMax(yTargets),
	domain, domainLength, padding, padding_top, padding_bottom,
	center = axisId === 'y2' ? config.axis_y2_center : config.axis_y_center,
	yDomainAbs, lengths, diff, ratio, isAllPositive, isAllNegative,
	isZeroBased = ($$.hasType('bar', yTargets) && config.bar_zerobased) \|\| ($$.hasType('area', yTargets) && config.area_zerobased),
	isInverted = axisId === 'y2' ? config.axis_y2_inverted : config.axis_y_inverted,
	showHorizontalDataLabel = $$.hasDataLabel() && config.axis_rotated,
	showVerticalDataLabel = $$.hasDataLabel() && !config.axis_rotated;

	// MEMO: avoid inverting domain unexpectedly
	yDomainMin = isValue(yMin) ? yMin : isValue(yMax) ? (yDomainMin < yMax ? yDomainMin : yMax - 10) : yDomainMin;
	yDomainMax = isValue(yMax) ? yMax : isValue(yMin) ? (yMin < yDomainMax ? yDomainMax : yMin + 10) : yDomainMax;

	if (yTargets.length === 0) { // use current domain if target of axisId is none
	return axisId === 'y2' ? $$.y2.domain() : $$.y.domain();
	}
	if (isNaN(yDomainMin)) { // set minimum to zero when not number
	yDomainMin = 0;
	}
	if (isNaN(yDomainMax)) { // set maximum to have same value as yDomainMin
	yDomainMax = yDomainMin;
	}
	if (yDomainMin === yDomainMax) {
	yDomainMin < 0 ? yDomainMax = 0 : yDomainMin = 0;
	}
	isAllPositive = yDomainMin >= 0 && yDomainMax >= 0;
	isAllNegative = yDomainMin <= 0 && yDomainMax <= 0;

	// Cancel zerobased if axis__min / axis__max specified
	if ((isValue(yMin) && isAllPositive) \|\| (isValue(yMax) && isAllNegative)) {
	isZeroBased = false;
	}

	// Bar/Area chart should be 0-based if all positive\|negative
	if (isZeroBased) {
	if (isAllPositive) { yDomainMin = 0; }
	if (isAllNegative) { yDomainMax = 0; }
	}

	domainLength = Math.abs(yDomainMax - yDomainMin);
	padding = padding_top = padding_bottom = domainLength * 0.1;

	if (typeof center !== 'undefined') {
	yDomainAbs = Math.max(Math.abs(yDomainMin), Math.abs(yDomainMax));
	yDomainMax = center + yDomainAbs;
	yDomainMin = center - yDomainAbs;
	}
	// add padding for data label
	if (showHorizontalDataLabel) {
	lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'width');
	diff = diffDomain($$.y.range());
	ratio = [lengths[0] / diff, lengths[1] / diff];
	padding_top += domainLength * (ratio[1] / (1 - ratio[0] - ratio[1]));
	padding_bottom += domainLength * (ratio[0] / (1 - ratio[0] - ratio[1]));
	} else if (showVerticalDataLabel) {
	lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'height');
	padding_top += $$.axis.convertPixelsToAxisPadding(lengths[1], domainLength);
	padding_bottom += $$.axis.convertPixelsToAxisPadding(lengths[0], domainLength);
	}
	if (axisId === 'y' && notEmpty(config.axis_y_padding)) {
	padding_top = $$.axis.getPadding(config.axis_y_padding, 'top', padding_top, domainLength);
	padding_bottom = $$.axis.getPadding(config.axis_y_padding, 'bottom', padding_bottom, domainLength);
	}
	if (axisId === 'y2' && notEmpty(config.axis_y2_padding)) {
	padding_top = $$.axis.getPadding(config.axis_y2_padding, 'top', padding_top, domainLength);
	padding_bottom = $$.axis.getPadding(config.axis_y2_padding, 'bottom', padding_bottom, domainLength);
	}
	// Bar/Area chart should be 0-based if all positive\|negative
	if (isZeroBased) {
	if (isAllPositive) { padding_bottom = yDomainMin; }
	if (isAllNegative) { padding_top = -yDomainMax; }
	}
	domain = [yDomainMin - padding_bottom, yDomainMax + padding_top];
	return isInverted ? domain.reverse() : domain;
	};
	c3_chart_internal_fn.getXDomainMin = function (targets) {
	var $$ = this, config = $$.config;
	return isDefined(config.axis_x_min) ?
	($$.isTimeSeries() ? this.parseDate(config.axis_x_min) : config.axis_x_min) :
	$$.d3.min(targets, function (t) { return $$.d3.min(t.values, function (v) { return v.x; }); });
	};
	c3_chart_internal_fn.getXDomainMax = function (targets) {
	var $$ = this, config = $$.config;
	return isDefined(config.axis_x_max) ?
	($$.isTimeSeries() ? this.parseDate(config.axis_x_max) : config.axis_x_max) :
	$$.d3.max(targets, function (t) { return $$.d3.max(t.values, function (v) { return v.x; }); });
	};
	c3_chart_internal_fn.getXDomainPadding = function (domain) {
	var $$ = this, config = $$.config,
	diff = domain[1] - domain[0],
	maxDataCount, padding, paddingLeft, paddingRight;
	if ($$.isCategorized()) {
	padding = 0;
	} else if ($$.hasType('bar')) {
	maxDataCount = $$.getMaxDataCount();
	padding = maxDataCount > 1 ? (diff / (maxDataCount - 1)) / 2 : 0.5;
	} else {
	padding = diff * 0.01;
	}
	if (typeof config.axis_x_padding === 'object' && notEmpty(config.axis_x_padding)) {
	paddingLeft = isValue(config.axis_x_padding.left) ? config.axis_x_padding.left : padding;
	paddingRight = isValue(config.axis_x_padding.right) ? config.axis_x_padding.right : padding;
	} else if (typeof config.axis_x_padding === 'number') {
	paddingLeft = paddingRight = config.axis_x_padding;
	} else {
	paddingLeft = paddingRight = padding;
	}
	return {left: paddingLeft, right: paddingRight};
	};
	c3_chart_internal_fn.getXDomain = function (targets) {
	var $$ = this,
	xDomain = [$$.getXDomainMin(targets), $$.getXDomainMax(targets)],
	firstX = xDomain[0], lastX = xDomain[1],
	padding = $$.getXDomainPadding(xDomain),
	min = 0, max = 0;
	// show center of x domain if min and max are the same
	if ((firstX - lastX) === 0 && !$$.isCategorized()) {
	if ($$.isTimeSeries()) {
	firstX = new Date(firstX.getTime() * 0.5);
	lastX = new Date(lastX.getTime() * 1.5);
	} else {
	firstX = firstX === 0 ? 1 : (firstX * 0.5);
	lastX = lastX === 0 ? -1 : (lastX * 1.5);
	}
	}
	if (firstX \|\| firstX === 0) {
	min = $$.isTimeSeries() ? new Date(firstX.getTime() - padding.left) : firstX - padding.left;
	}
	if (lastX \|\| lastX === 0) {
	max = $$.isTimeSeries() ? new Date(lastX.getTime() + padding.right) : lastX + padding.right;
	}
	return [min, max];
	};
	c3_chart_internal_fn.updateXDomain = function (targets, withUpdateXDomain, withUpdateOrgXDomain, withTrim, domain) {
	var $$ = this, config = $$.config;

	if (withUpdateOrgXDomain) {
	$$.x.domain(domain ? domain : $$.d3.extent($$.getXDomain(targets)));
	$$.orgXDomain = $$.x.domain();
	if (config.zoom_enabled) { $$.zoom.scale($$.x).updateScaleExtent(); }
	$$.subX.domain($$.x.domain());
	if ($$.brush) { $$.brush.scale($$.subX); }
	}
	if (withUpdateXDomain) {
	$$.x.domain(domain ? domain : (!$$.brush \|\| $$.brush.empty()) ? $$.orgXDomain : $$.brush.extent());
	if (config.zoom_enabled) { $$.zoom.scale($$.x).updateScaleExtent(); }
	}

	// Trim domain when too big by zoom mousemove event
	if (withTrim) { $$.x.domain($$.trimXDomain($$.x.orgDomain())); }

	return $$.x.domain();
	};
	c3_chart_internal_fn.trimXDomain = function (domain) {
	var $$ = this;
	if (domain[0] <= $$.orgXDomain[0]) {
	domain[1] = +domain[1] + ($$.orgXDomain[0] - domain[0]);
	domain[0] = $$.orgXDomain[0];
	}
	if ($$.orgXDomain[1] <= domain[1]) {
	domain[0] = +domain[0] - (domain[1] - $$.orgXDomain[1]);
	domain[1] = $$.orgXDomain[1];
	}
	return domain;
	};

	c3_chart_internal_fn.isX = function (key) {
	var $$ = this, config = $$.config;
	return (config.data_x && key === config.data_x) \|\| (notEmpty(config.data_xs) && hasValue(config.data_xs, key));
	};
	c3_chart_internal_fn.isNotX = function (key) {
	return !this.isX(key);
	};
	c3_chart_internal_fn.getXKey = function (id) {
	var $$ = this, config = $$.config;
	return config.data_x ? config.data_x : notEmpty(config.data_xs) ? config.data_xs[id] : null;
	};
	c3_chart_internal_fn.getXValuesOfXKey = function (key, targets) {
	var $$ = this,
	xValues, ids = targets && notEmpty(targets) ? $$.mapToIds(targets) : [];
	ids.forEach(function (id) {
	if ($$.getXKey(id) === key) {
	xValues = $$.data.xs[id];
	}
	});
	return xValues;
	};
	c3_chart_internal_fn.getIndexByX = function (x) {
	var $$ = this,
	data = $$.filterByX($$.data.targets, x);
	return data.length ? data[0].index : null;
	};
	c3_chart_internal_fn.getXValue = function (id, i) {
	var $$ = this;
	return id in $$.data.xs && $$.data.xs[id] && isValue($$.data.xs[id][i]) ? $$.data.xs[id][i] : i;
	};
	c3_chart_internal_fn.getOtherTargetXs = function () {
	var $$ = this,
	idsForX = Object.keys($$.data.xs);
	return idsForX.length ? $$.data.xs[idsForX[0]] : null;
	};
	c3_chart_internal_fn.getOtherTargetX = function (index) {
	var xs = this.getOtherTargetXs();
	return xs && index < xs.length ? xs[index] : null;
	};
	c3_chart_internal_fn.addXs = function (xs) {
	var $$ = this;
	Object.keys(xs).forEach(function (id) {
	$$.config.data_xs[id] = xs[id];
	});
	};
	c3_chart_internal_fn.hasMultipleX = function (xs) {
	return this.d3.set(Object.keys(xs).map(function (id) { return xs[id]; })).size() > 1;
	};
	c3_chart_internal_fn.isMultipleX = function () {
	return notEmpty(this.config.data_xs) \|\| !this.config.data_xSort \|\| this.hasType('scatter');
	};
	c3_chart_internal_fn.addName = function (data) {
	var $$ = this, name;
	if (data) {
	name = $$.config.data_names[data.id];
	data.name = name ? name : data.id;
	}
	return data;
	};
	c3_chart_internal_fn.getValueOnIndex = function (values, index) {
	var valueOnIndex = values.filter(function (v) { return v.index === index; });
	return valueOnIndex.length ? valueOnIndex[0] : null;
	};
	c3_chart_internal_fn.updateTargetX = function (targets, x) {
	var $$ = this;
	targets.forEach(function (t) {
	t.values.forEach(function (v, i) {
	v.x = $$.generateTargetX(x[i], t.id, i);
	});
	$$.data.xs[t.id] = x;
	});
	};
	c3_chart_internal_fn.updateTargetXs = function (targets, xs) {
	var $$ = this;
	targets.forEach(function (t) {
	if (xs[t.id]) {
	$$.updateTargetX([t], xs[t.id]);
	}
	});
	};
	c3_chart_internal_fn.generateTargetX = function (rawX, id, index) {
	var $$ = this, x;
	if ($$.isTimeSeries()) {
	x = rawX ? $$.parseDate(rawX) : $$.parseDate($$.getXValue(id, index));
	}
	else if ($$.isCustomX() && !$$.isCategorized()) {
	x = isValue(rawX) ? +rawX : $$.getXValue(id, index);
	}
	else {
	x = index;
	}
	return x;
	};
	c3_chart_internal_fn.cloneTarget = function (target) {
	return {
	id : target.id,
	id_org : target.id_org,
	values : target.values.map(function (d) {
	return {x: d.x, value: d.value, id: d.id};
	})
	};
	};
	c3_chart_internal_fn.updateXs = function () {
	var $$ = this;
	if ($$.data.targets.length) {
	$$.xs = [];
	$$.data.targets[0].values.forEach(function (v) {
	$$.xs[v.index] = v.x;
	});
	}
	};
	c3_chart_internal_fn.getPrevX = function (i) {
	var x = this.xs[i - 1];
	return typeof x !== 'undefined' ? x : null;
	};
	c3_chart_internal_fn.getNextX = function (i) {
	var x = this.xs[i + 1];
	return typeof x !== 'undefined' ? x : null;
	};
	c3_chart_internal_fn.getMaxDataCount = function () {
	var $$ = this;
	return $$.d3.max($$.data.targets, function (t) { return t.values.length; });
	};
	c3_chart_internal_fn.getMaxDataCountTarget = function (targets) {
	var length = targets.length, max = 0, maxTarget;
	if (length > 1) {
	targets.forEach(function (t) {
	if (t.values.length > max) {
	maxTarget = t;
	max = t.values.length;
	}
	});
	} else {
	maxTarget = length ? targets[0] : null;
	}
	return maxTarget;
	};
	c3_chart_internal_fn.getEdgeX = function (targets) {
	var $$ = this;
	return !targets.length ? [0, 0] : [
	$$.d3.min(targets, function (t) { return t.values[0].x; }),
	$$.d3.max(targets, function (t) { return t.values[t.values.length - 1].x; })
	];
	};
	c3_chart_internal_fn.mapToIds = function (targets) {
	return targets.map(function (d) { return d.id; });
	};
	c3_chart_internal_fn.mapToTargetIds = function (ids) {
	var $$ = this;
	return ids ? (isString(ids) ? [ids] : ids) : $$.mapToIds($$.data.targets);
	};
	c3_chart_internal_fn.hasTarget = function (targets, id) {
	var ids = this.mapToIds(targets), i;
	for (i = 0; i < ids.length; i++) {
	if (ids[i] === id) {
	return true;
	}
	}
	return false;
	};
	c3_chart_internal_fn.isTargetToShow = function (targetId) {
	return this.hiddenTargetIds.indexOf(targetId) < 0;
	};
	c3_chart_internal_fn.isLegendToShow = function (targetId) {
	return this.hiddenLegendIds.indexOf(targetId) < 0;
	};
	c3_chart_internal_fn.filterTargetsToShow = function (targets) {
	var $$ = this;
	return targets.filter(function (t) { return $$.isTargetToShow(t.id); });
	};
	c3_chart_internal_fn.mapTargetsToUniqueXs = function (targets) {
	var $$ = this;
	var xs = $$.d3.set($$.d3.merge(targets.map(function (t) { return t.values.map(function (v) { return +v.x; }); }))).values();
	return $$.isTimeSeries() ? xs.map(function (x) { return new Date(+x); }) : xs.map(function (x) { return +x; });
	};
	c3_chart_internal_fn.addHiddenTargetIds = function (targetIds) {
	this.hiddenTargetIds = this.hiddenTargetIds.concat(targetIds);
	};
	c3_chart_internal_fn.removeHiddenTargetIds = function (targetIds) {
	this.hiddenTargetIds = this.hiddenTargetIds.filter(function (id) { return targetIds.indexOf(id) < 0; });
	};
	c3_chart_internal_fn.addHiddenLegendIds = function (targetIds) {
	this.hiddenLegendIds = this.hiddenLegendIds.concat(targetIds);
	};
	c3_chart_internal_fn.removeHiddenLegendIds = function (targetIds) {
	this.hiddenLegendIds = this.hiddenLegendIds.filter(function (id) { return targetIds.indexOf(id) < 0; });
	};
	c3_chart_internal_fn.getValuesAsIdKeyed = function (targets) {
	var ys = {};
	targets.forEach(function (t) {
	ys[t.id] = [];
	t.values.forEach(function (v) {
	ys[t.id].push(v.value);
	});
	});
	return ys;
	};
	c3_chart_internal_fn.checkValueInTargets = function (targets, checker) {
	var ids = Object.keys(targets), i, j, values;
	for (i = 0; i < ids.length; i++) {
	values = targets[ids[i]].values;
	for (j = 0; j < values.length; j++) {
	if (checker(values[j].value)) {
	return true;
	}
	}
	}
	return false;
	};
	c3_chart_internal_fn.hasNegativeValueInTargets = function (targets) {
	return this.checkValueInTargets(targets, function (v) { return v < 0; });
	};
	c3_chart_internal_fn.hasPositiveValueInTargets = function (targets) {
	return this.checkValueInTargets(targets, function (v) { return v > 0; });
	};
	c3_chart_internal_fn.isOrderDesc = function () {
	var config = this.config;
	return typeof(config.data_order) === 'string' && config.data_order.toLowerCase() === 'desc';
	};
	c3_chart_internal_fn.isOrderAsc = function () {
	var config = this.config;
	return typeof(config.data_order) === 'string' && config.data_order.toLowerCase() === 'asc';
	};
	c3_chart_internal_fn.orderTargets = function (targets) {
	var $$ = this, config = $$.config, orderAsc = $$.isOrderAsc(), orderDesc = $$.isOrderDesc();
	if (orderAsc \|\| orderDesc) {
	targets.sort(function (t1, t2) {
	var reducer = function (p, c) { return p + Math.abs(c.value); };
	var t1Sum = t1.values.reduce(reducer, 0),
	t2Sum = t2.values.reduce(reducer, 0);
	return orderAsc ? t2Sum - t1Sum : t1Sum - t2Sum;
	});
	} else if (isFunction(config.data_order)) {
	targets.sort(config.data_order);
	} // TODO: accept name array for order
	return targets;
	};
	c3_chart_internal_fn.filterByX = function (targets, x) {
	return this.d3.merge(targets.map(function (t) { return t.values; })).filter(function (v) { return v.x - x === 0; });
	};
	c3_chart_internal_fn.filterRemoveNull = function (data) {
	return data.filter(function (d) { return isValue(d.value); });
	};
	c3_chart_internal_fn.filterByXDomain = function (targets, xDomain) {
	return targets.map(function (t) {
	return {
	id: t.id,
	id_org: t.id_org,
	values: t.values.filter(function (v) {
	return xDomain[0] <= v.x && v.x <= xDomain[1];
	})
	};
	});
	};
	c3_chart_internal_fn.hasDataLabel = function () {
	var config = this.config;
	if (typeof config.data_labels === 'boolean' && config.data_labels) {
	return true;
	} else if (typeof config.data_labels === 'object' && notEmpty(config.data_labels)) {
	return true;
	}
	return false;
	};
	c3_chart_internal_fn.getDataLabelLength = function (min, max, key) {
	var $$ = this,
	lengths = [0, 0], paddingCoef = 1.3;
	$$.selectChart.select('svg').selectAll('.dummy')
	.data([min, max])
	.enter().append('text')
	.text(function (d) { return $$.dataLabelFormat(d.id)(d); })
	.each(function (d, i) {
	lengths[i] = this.getBoundingClientRect()[key] * paddingCoef;
	})
	.remove();
	return lengths;
	};
	c3_chart_internal_fn.isNoneArc = function (d) {
	return this.hasTarget(this.data.targets, d.id);
	},
	c3_chart_internal_fn.isArc = function (d) {
	return 'data' in d && this.hasTarget(this.data.targets, d.data.id);
	};
	c3_chart_internal_fn.findSameXOfValues = function (values, index) {
	var i, targetX = values[index].x, sames = [];
	for (i = index - 1; i >= 0; i--) {
	if (targetX !== values[i].x) { break; }
	sames.push(values[i]);
	}
	for (i = index; i < values.length; i++) {
	if (targetX !== values[i].x) { break; }
	sames.push(values[i]);
	}
	return sames;
	};

	c3_chart_internal_fn.findClosestFromTargets = function (targets, pos) {
	var $$ = this, candidates;

	// map to array of closest points of each target
	candidates = targets.map(function (target) {
	return $$.findClosest(target.values, pos);
	});

	// decide closest point and return
	return $$.findClosest(candidates, pos);
	};
	c3_chart_internal_fn.findClosest = function (values, pos) {
	var $$ = this, minDist = 100, closest;

	// find mouseovering bar
	values.filter(function (v) { return v && $$.isBarType(v.id); }).forEach(function (v) {
	var shape = $$.main.select('.' + CLASS.bars + $$.getTargetSelectorSuffix(v.id) + ' .' + CLASS.bar + '-' + v.index).node();
	if (!closest && $$.isWithinBar(shape)) {
	closest = v;
	}
	});

	// find closest point from non-bar
	values.filter(function (v) { return v && !$$.isBarType(v.id); }).forEach(function (v) {
	var d = $$.dist(v, pos);
	if (d < minDist) {
	minDist = d;
	closest = v;
	}
	});

	return closest;
	};
	c3_chart_internal_fn.dist = function (data, pos) {
	var $$ = this, config = $$.config,
	xIndex = config.axis_rotated ? 1 : 0,
	yIndex = config.axis_rotated ? 0 : 1,
	y = $$.circleY(data, data.index),
	x = $$.x(data.x);
	return Math.pow(x - pos[xIndex], 2) + Math.pow(y - pos[yIndex], 2);
	};
	c3_chart_internal_fn.convertValuesToStep = function (values) {
	var converted = [].concat(values), i;

	if (!this.isCategorized()) {
	return values;
	}

	for (i = values.length + 1; 0 < i; i--) {
	converted[i] = converted[i - 1];
	}

	converted[0] = {
	x: converted[0].x - 1,
	value: converted[0].value,
	id: converted[0].id
	};
	converted[values.length + 1] = {
	x: converted[values.length].x + 1,
	value: converted[values.length].value,
	id: converted[values.length].id
	};

	return converted;
	};
	c3_chart_internal_fn.updateDataAttributes = function (name, attrs) {
	var $$ = this, config = $$.config, current = config['data_' + name];
	if (typeof attrs === 'undefined') { return current; }
	Object.keys(attrs).forEach(function (id) {
	current[id] = attrs[id];
	});
	$$.redraw({withLegend: true});
	return current;
	};

	c3_chart_internal_fn.convertUrlToData = function (url, mimeType, keys, done) {
	var $$ = this, type = mimeType ? mimeType : 'csv';
	$$.d3.xhr(url, function (error, data) {
	var d;
	if (!data) {
	throw new Error(error.responseURL + ' ' + error.status + ' (' + error.statusText + ')');
	}
	if (type === 'json') {
	d = $$.convertJsonToData(JSON.parse(data.response), keys);
	} else if (type === 'tsv') {
	d = $$.convertTsvToData(data.response);
	} else {
	d = $$.convertCsvToData(data.response);
	}
	done.call($$, d);
	});
	};
	c3_chart_internal_fn.convertXsvToData = function (xsv, parser) {
	var rows = parser.parseRows(xsv), d;
	if (rows.length === 1) {
	d = [{}];
	rows[0].forEach(function (id) {
	d[0][id] = null;
	});
	} else {
	d = parser.parse(xsv);
	}
	return d;
	};
	c3_chart_internal_fn.convertCsvToData = function (csv) {
	return this.convertXsvToData(csv, this.d3.csv);
	};
	c3_chart_internal_fn.convertTsvToData = function (tsv) {
	return this.convertXsvToData(tsv, this.d3.tsv);
	};
	c3_chart_internal_fn.convertJsonToData = function (json, keys) {
	var $$ = this,
	new_rows = [], targetKeys, data;
	if (keys) { // when keys specified, json would be an array that includes objects
	if (keys.x) {
	targetKeys = keys.value.concat(keys.x);
	$$.config.data_x = keys.x;
	} else {
	targetKeys = keys.value;
	}
	new_rows.push(targetKeys);
	json.forEach(function (o) {
	var new_row = [];
	targetKeys.forEach(function (key) {
	// convert undefined to null because undefined data will be removed in convertDataToTargets()
	var v = isUndefined(o[key]) ? null : o[key];
	new_row.push(v);
	});
	new_rows.push(new_row);
	});
	data = $$.convertRowsToData(new_rows);
	} else {
	Object.keys(json).forEach(function (key) {
	new_rows.push([key].concat(json[key]));
	});
	data = $$.convertColumnsToData(new_rows);
	}
	return data;
	};
	c3_chart_internal_fn.convertRowsToData = function (rows) {
	var keys = rows[0], new_row = {}, new_rows = [], i, j;
	for (i = 1; i < rows.length; i++) {
	new_row = {};
	for (j = 0; j < rows[i].length; j++) {
	if (isUndefined(rows[i][j])) {
	throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
	}
	new_row[keys[j]] = rows[i][j];
	}
	new_rows.push(new_row);
	}
	return new_rows;
	};
	c3_chart_internal_fn.convertColumnsToData = function (columns) {
	var new_rows = [], i, j, key;
	for (i = 0; i < columns.length; i++) {
	key = columns[i][0];
	for (j = 1; j < columns[i].length; j++) {
	if (isUndefined(new_rows[j - 1])) {
	new_rows[j - 1] = {};
	}
	if (isUndefined(columns[i][j])) {
	throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
	}
	new_rows[j - 1][key] = columns[i][j];
	}
	}
	return new_rows;
	};
	c3_chart_internal_fn.convertDataToTargets = function (data, appendXs) {
	var $$ = this, config = $$.config,
	ids = $$.d3.keys(data[0]).filter($$.isNotX, $$),
	xs = $$.d3.keys(data[0]).filter($$.isX, $$),
	targets;

	// save x for update data by load when custom x and c3.x API
	ids.forEach(function (id) {
	var xKey = $$.getXKey(id);

	if ($$.isCustomX() \|\| $$.isTimeSeries()) {
	// if included in input data
	if (xs.indexOf(xKey) >= 0) {
	$$.data.xs[id] = (appendXs && $$.data.xs[id] ? $$.data.xs[id] : []).concat(
	data.map(function (d) { return d[xKey]; })
	.filter(isValue)
	.map(function (rawX, i) { return $$.generateTargetX(rawX, id, i); })
	);
	}
	// if not included in input data, find from preloaded data of other id's x
	else if (config.data_x) {
	$$.data.xs[id] = $$.getOtherTargetXs();
	}
	// if not included in input data, find from preloaded data
	else if (notEmpty(config.data_xs)) {
	$$.data.xs[id] = $$.getXValuesOfXKey(xKey, $$.data.targets);
	}
	// MEMO: if no x included, use same x of current will be used
	} else {
	$$.data.xs[id] = data.map(function (d, i) { return i; });
	}
	});


	// check x is defined
	ids.forEach(function (id) {
	if (!$$.data.xs[id]) {
	throw new Error('x is not defined for id = "' + id + '".');
	}
	});

	// convert to target
	targets = ids.map(function (id, index) {
	var convertedId = config.data_idConverter(id);
	return {
	id: convertedId,
	id_org: id,
	values: data.map(function (d, i) {
	var xKey = $$.getXKey(id), rawX = d[xKey], x = $$.generateTargetX(rawX, id, i);
	// use x as categories if custom x and categorized
	if ($$.isCustomX() && $$.isCategorized() && index === 0 && rawX) {
	if (i === 0) { config.axis_x_categories = []; }
	config.axis_x_categories.push(rawX);
	}
	// mark as x = undefined if value is undefined and filter to remove after mapped
	if (isUndefined(d[id]) \|\| $$.data.xs[id].length <= i) {
	x = undefined;
	}
	return {x: x, value: d[id] !== null && !isNaN(d[id]) ? +d[id] : null, id: convertedId};
	}).filter(function (v) { return isDefined(v.x); })
	};
	});

	// finish targets
	targets.forEach(function (t) {
	var i;
	// sort values by its x
	if (config.data_xSort) {
	t.values = t.values.sort(function (v1, v2) {
	var x1 = v1.x \|\| v1.x === 0 ? v1.x : Infinity,
	x2 = v2.x \|\| v2.x === 0 ? v2.x : Infinity;
	return x1 - x2;
	});
	}
	// indexing each value
	i = 0;
	t.values.forEach(function (v) {
	v.index = i++;
	});
	// this needs to be sorted because its index and value.index is identical
	$$.data.xs[t.id].sort(function (v1, v2) {
	return v1 - v2;
	});
	});

	// set target types
	if (config.data_type) {
	$$.setTargetType($$.mapToIds(targets).filter(function (id) { return ! (id in config.data_types); }), config.data_type);
	}

	// cache as original id keyed
	targets.forEach(function (d) {
	$$.addCache(d.id_org, d);
	});

	return targets;
	};

	c3_chart_internal_fn.load = function (targets, args) {
	var $$ = this;
	if (targets) {
	// filter loading targets if needed
	if (args.filter) {
	targets = targets.filter(args.filter);
	}
	// set type if args.types \|\| args.type specified
	if (args.type \|\| args.types) {
	targets.forEach(function (t) {
	var type = args.types && args.types[t.id] ? args.types[t.id] : args.type;
	$$.setTargetType(t.id, type);
	});
	}
	// Update/Add data
	$$.data.targets.forEach(function (d) {
	for (var i = 0; i < targets.length; i++) {
	if (d.id === targets[i].id) {
	d.values = targets[i].values;
	targets.splice(i, 1);
	break;
	}
	}
	});
	$$.data.targets = $$.data.targets.concat(targets); // add remained
	}

	// Set targets
	$$.updateTargets($$.data.targets);

	// Redraw with new targets
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true});

	if (args.done) { args.done(); }
	};
	c3_chart_internal_fn.loadFromArgs = function (args) {
	var $$ = this;
	if (args.data) {
	$$.load($$.convertDataToTargets(args.data), args);
	}
	else if (args.url) {
	$$.convertUrlToData(args.url, args.mimeType, args.keys, function (data) {
	$$.load($$.convertDataToTargets(data), args);
	});
	}
	else if (args.json) {
	$$.load($$.convertDataToTargets($$.convertJsonToData(args.json, args.keys)), args);
	}
	else if (args.rows) {
	$$.load($$.convertDataToTargets($$.convertRowsToData(args.rows)), args);
	}
	else if (args.columns) {
	$$.load($$.convertDataToTargets($$.convertColumnsToData(args.columns)), args);
	}
	else {
	$$.load(null, args);
	}
	};
	c3_chart_internal_fn.unload = function (targetIds, done) {
	var $$ = this;
	if (!done) {
	done = function () {};
	}
	// filter existing target
	targetIds = targetIds.filter(function (id) { return $$.hasTarget($$.data.targets, id); });
	// If no target, call done and return
	if (!targetIds \|\| targetIds.length === 0) {
	done();
	return;
	}
	$$.svg.selectAll(targetIds.map(function (id) { return $$.selectorTarget(id); }))
	.transition()
	.style('opacity', 0)
	.remove()
	.call($$.endall, done);
	targetIds.forEach(function (id) {
	// Reset fadein for future load
	$$.withoutFadeIn[id] = false;
	// Remove target's elements
	if ($$.legend) {
	$$.legend.selectAll('.' + CLASS.legendItem + $$.getTargetSelectorSuffix(id)).remove();
	}
	// Remove target
	$$.data.targets = $$.data.targets.filter(function (t) {
	return t.id !== id;
	});
	});
	};

	c3_chart_internal_fn.categoryName = function (i) {
	var config = this.config;
	return i < config.axis_x_categories.length ? config.axis_x_categories[i] : i;
	};

	c3_chart_internal_fn.initEventRect = function () {
	var $$ = this;
	$$.main.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.eventRects)
	.style('fill-opacity', 0);
	};
	c3_chart_internal_fn.redrawEventRect = function () {
	var $$ = this, config = $$.config,
	eventRectUpdate, maxDataCountTarget,
	isMultipleX = $$.isMultipleX();

	// rects for mouseover
	var eventRects = $$.main.select('.' + CLASS.eventRects)
	.style('cursor', config.zoom_enabled ? config.axis_rotated ? 'ns-resize' : 'ew-resize' : null)
	.classed(CLASS.eventRectsMultiple, isMultipleX)
	.classed(CLASS.eventRectsSingle, !isMultipleX);

	// clear old rects
	eventRects.selectAll('.' + CLASS.eventRect).remove();

	// open as public variable
	$$.eventRect = eventRects.selectAll('.' + CLASS.eventRect);

	if (isMultipleX) {
	eventRectUpdate = $$.eventRect.data([0]);
	// enter : only one rect will be added
	$$.generateEventRectsForMultipleXs(eventRectUpdate.enter());
	// update
	$$.updateEventRect(eventRectUpdate);
	// exit : not needed because always only one rect exists
	}
	else {
	// Set data and update $$.eventRect
	maxDataCountTarget = $$.getMaxDataCountTarget($$.data.targets);
	eventRects.datum(maxDataCountTarget ? maxDataCountTarget.values : []);
	$$.eventRect = eventRects.selectAll('.' + CLASS.eventRect);
	eventRectUpdate = $$.eventRect.data(function (d) { return d; });
	// enter
	$$.generateEventRectsForSingleX(eventRectUpdate.enter());
	// update
	$$.updateEventRect(eventRectUpdate);
	// exit
	eventRectUpdate.exit().remove();
	}
	};
	c3_chart_internal_fn.updateEventRect = function (eventRectUpdate) {
	var $$ = this, config = $$.config,
	x, y, w, h, rectW, rectX;

	// set update selection if null
	eventRectUpdate = eventRectUpdate \|\| $$.eventRect.data(function (d) { return d; });

	if ($$.isMultipleX()) {
	// TODO: rotated not supported yet
	x = 0;
	y = 0;
	w = $$.width;
	h = $$.height;
	}
	else {
	if (($$.isCustomX() \|\| $$.isTimeSeries()) && !$$.isCategorized()) {

	// update index for x that is used by prevX and nextX
	$$.updateXs();

	rectW = function (d) {
	var prevX = $$.getPrevX(d.index), nextX = $$.getNextX(d.index);

	// if there this is a single data point make the eventRect full width (or height)
	if (prevX === null && nextX === null) {
	return config.axis_rotated ? $$.height : $$.width;
	}

	if (prevX === null) { prevX = $$.x.domain()[0]; }
	if (nextX === null) { nextX = $$.x.domain()[1]; }

	return Math.max(0, ($$.x(nextX) - $$.x(prevX)) / 2);
	};
	rectX = function (d) {
	var prevX = $$.getPrevX(d.index), nextX = $$.getNextX(d.index),
	thisX = $$.data.xs[d.id][d.index];

	// if there this is a single data point position the eventRect at 0
	if (prevX === null && nextX === null) {
	return 0;
	}

	if (prevX === null) { prevX = $$.x.domain()[0]; }

	return ($$.x(thisX) + $$.x(prevX)) / 2;
	};
	} else {
	rectW = $$.getEventRectWidth();
	rectX = function (d) {
	return $$.x(d.x) - (rectW / 2);
	};
	}
	x = config.axis_rotated ? 0 : rectX;
	y = config.axis_rotated ? rectX : 0;
	w = config.axis_rotated ? $$.width : rectW;
	h = config.axis_rotated ? rectW : $$.height;
	}

	eventRectUpdate
	.attr('class', $$.classEvent.bind($$))
	.attr("x", x)
	.attr("y", y)
	.attr("width", w)
	.attr("height", h);
	};
	c3_chart_internal_fn.generateEventRectsForSingleX = function (eventRectEnter) {
	var $$ = this, d3 = $$.d3, config = $$.config;
	eventRectEnter.append("rect")
	.attr("class", $$.classEvent.bind($$))
	.style("cursor", config.data_selection_enabled && config.data_selection_grouped ? "pointer" : null)
	.on('mouseover', function (d) {
	var index = d.index;

	if ($$.dragging \|\| $$.flowing) { return; } // do nothing while dragging/flowing
	if ($$.hasArcType()) { return; }

	// Expand shapes for selection
	if (config.point_focus_expand_enabled) { $$.expandCircles(index, null, true); }
	$$.expandBars(index, null, true);

	// Call event handler
	$$.main.selectAll('.' + CLASS.shape + '-' + index).each(function (d) {
	config.data_onmouseover.call($$.api, d);
	});
	})
	.on('mouseout', function (d) {
	var index = d.index;
	if (!$$.config) { return; } // chart is destroyed
	if ($$.hasArcType()) { return; }
	$$.hideXGridFocus();
	$$.hideTooltip();
	// Undo expanded shapes
	$$.unexpandCircles();
	$$.unexpandBars();
	// Call event handler
	$$.main.selectAll('.' + CLASS.shape + '-' + index).each(function (d) {
	config.data_onmouseout.call($$.api, d);
	});
	})
	.on('mousemove', function (d) {
	var selectedData, index = d.index,
	eventRect = $$.svg.select('.' + CLASS.eventRect + '-' + index);

	if ($$.dragging \|\| $$.flowing) { return; } // do nothing while dragging/flowing
	if ($$.hasArcType()) { return; }

	if ($$.isStepType(d) && $$.config.line_step_type === 'step-after' && d3.mouse(this)[0] < $$.x($$.getXValue(d.id, index))) {
	index -= 1;
	}

	// Show tooltip
	selectedData = $$.filterTargetsToShow($$.data.targets).map(function (t) {
	return $$.addName($$.getValueOnIndex(t.values, index));
	});

	if (config.tooltip_grouped) {
	$$.showTooltip(selectedData, this);
	$$.showXGridFocus(selectedData);
	}

	if (config.tooltip_grouped && (!config.data_selection_enabled \|\| config.data_selection_grouped)) {
	return;
	}

	$$.main.selectAll('.' + CLASS.shape + '-' + index)
	.each(function () {
	d3.select(this).classed(CLASS.EXPANDED, true);
	if (config.data_selection_enabled) {
	eventRect.style('cursor', config.data_selection_grouped ? 'pointer' : null);
	}
	if (!config.tooltip_grouped) {
	$$.hideXGridFocus();
	$$.hideTooltip();
	if (!config.data_selection_grouped) {
	$$.unexpandCircles(index);
	$$.unexpandBars(index);
	}
	}
	})
	.filter(function (d) {
	return $$.isWithinShape(this, d);
	})
	.each(function (d) {
	if (config.data_selection_enabled && (config.data_selection_grouped \|\| config.data_selection_isselectable(d))) {
	eventRect.style('cursor', 'pointer');
	}
	if (!config.tooltip_grouped) {
	$$.showTooltip([d], this);
	$$.showXGridFocus([d]);
	if (config.point_focus_expand_enabled) { $$.expandCircles(index, d.id, true); }
	$$.expandBars(index, d.id, true);
	}
	});
	})
	.on('click', function (d) {
	var index = d.index;
	if ($$.hasArcType() \|\| !$$.toggleShape) { return; }
	if ($$.cancelClick) {
	$$.cancelClick = false;
	return;
	}
	if ($$.isStepType(d) && config.line_step_type === 'step-after' && d3.mouse(this)[0] < $$.x($$.getXValue(d.id, index))) {
	index -= 1;
	}
	$$.main.selectAll('.' + CLASS.shape + '-' + index).each(function (d) {
	if (config.data_selection_grouped \|\| $$.isWithinShape(this, d)) {
	$$.toggleShape(this, d, index);
	$$.config.data_onclick.call($$.api, d, this);
	}
	});
	})
	.call(
	config.data_selection_draggable && $$.drag ? (
	d3.behavior.drag().origin(Object)
	.on('drag', function () { $$.drag(d3.mouse(this)); })
	.on('dragstart', function () { $$.dragstart(d3.mouse(this)); })
	.on('dragend', function () { $$.dragend(); })
	) : function () {}
	);
	};

	c3_chart_internal_fn.generateEventRectsForMultipleXs = function (eventRectEnter) {
	var $$ = this, d3 = $$.d3, config = $$.config;

	function mouseout() {
	$$.svg.select('.' + CLASS.eventRect).style('cursor', null);
	$$.hideXGridFocus();
	$$.hideTooltip();
	$$.unexpandCircles();
	$$.unexpandBars();
	}

	eventRectEnter.append('rect')
	.attr('x', 0)
	.attr('y', 0)
	.attr('width', $$.width)
	.attr('height', $$.height)
	.attr('class', CLASS.eventRect)
	.on('mouseout', function () {
	if (!$$.config) { return; } // chart is destroyed
	if ($$.hasArcType()) { return; }
	mouseout();
	})
	.on('mousemove', function () {
	var targetsToShow = $$.filterTargetsToShow($$.data.targets);
	var mouse, closest, sameXData, selectedData;

	if ($$.dragging) { return; } // do nothing when dragging
	if ($$.hasArcType(targetsToShow)) { return; }

	mouse = d3.mouse(this);
	closest = $$.findClosestFromTargets(targetsToShow, mouse);

	if ($$.mouseover && (!closest \|\| closest.id !== $$.mouseover.id)) {
	config.data_onmouseout.call($$.api, $$.mouseover);
	$$.mouseover = undefined;
	}

	if (! closest) {
	mouseout();
	return;
	}

	if ($$.isScatterType(closest) \|\| !config.tooltip_grouped) {
	sameXData = [closest];
	} else {
	sameXData = $$.filterByX(targetsToShow, closest.x);
	}

	// show tooltip when cursor is close to some point
	selectedData = sameXData.map(function (d) {
	return $$.addName(d);
	});
	$$.showTooltip(selectedData, this);

	// expand points
	if (config.point_focus_expand_enabled) {
	$$.expandCircles(closest.index, closest.id, true);
	}
	$$.expandBars(closest.index, closest.id, true);

	// Show xgrid focus line
	$$.showXGridFocus(selectedData);

	// Show cursor as pointer if point is close to mouse position
	if ($$.isBarType(closest.id) \|\| $$.dist(closest, mouse) < 100) {
	$$.svg.select('.' + CLASS.eventRect).style('cursor', 'pointer');
	if (!$$.mouseover) {
	config.data_onmouseover.call($$.api, closest);
	$$.mouseover = closest;
	}
	}
	})
	.on('click', function () {
	var targetsToShow = $$.filterTargetsToShow($$.data.targets);
	var mouse, closest;

	if ($$.hasArcType(targetsToShow)) { return; }

	mouse = d3.mouse(this);
	closest = $$.findClosestFromTargets(targetsToShow, mouse);

	if (! closest) { return; }

	// select if selection enabled
	if ($$.isBarType(closest.id) \|\| $$.dist(closest, mouse) < 100) {
	$$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(closest.id)).selectAll('.' + CLASS.shape + '-' + closest.index).each(function () {
	if (config.data_selection_grouped \|\| $$.isWithinShape(this, closest)) {
	$$.toggleShape(this, closest, closest.index);
	$$.config.data_onclick.call($$.api, closest, this);
	}
	});
	}
	})
	.call(
	config.data_selection_draggable && $$.drag ? (
	d3.behavior.drag().origin(Object)
	.on('drag', function () { $$.drag(d3.mouse(this)); })
	.on('dragstart', function () { $$.dragstart(d3.mouse(this)); })
	.on('dragend', function () { $$.dragend(); })
	) : function () {}
	);
	};
	c3_chart_internal_fn.dispatchEvent = function (type, index, mouse) {
	var $$ = this,
	selector = '.' + CLASS.eventRect + (!$$.isMultipleX() ? '-' + index : ''),
	eventRect = $$.main.select(selector).node(),
	box = eventRect.getBoundingClientRect(),
	x = box.left + (mouse ? mouse[0] : 0),
	y = box.top + (mouse ? mouse[1] : 0),
	event = document.createEvent("MouseEvents");

	event.initMouseEvent(type, true, true, window, 0, x, y, x, y,
	false, false, false, false, 0, null);
	eventRect.dispatchEvent(event);
	};

	c3_chart_internal_fn.getCurrentWidth = function () {
	var $$ = this, config = $$.config;
	return config.size_width ? config.size_width : $$.getParentWidth();
	};
	c3_chart_internal_fn.getCurrentHeight = function () {
	var $$ = this, config = $$.config,
	h = config.size_height ? config.size_height : $$.getParentHeight();
	return h > 0 ? h : 320 / ($$.hasType('gauge') ? 2 : 1);
	};
	c3_chart_internal_fn.getCurrentPaddingTop = function () {
	var config = this.config;
	return isValue(config.padding_top) ? config.padding_top : 0;
	};
	c3_chart_internal_fn.getCurrentPaddingBottom = function () {
	var config = this.config;
	return isValue(config.padding_bottom) ? config.padding_bottom : 0;
	};
	c3_chart_internal_fn.getCurrentPaddingLeft = function (withoutRecompute) {
	var $$ = this, config = $$.config;
	if (isValue(config.padding_left)) {
	return config.padding_left;
	} else if (config.axis_rotated) {
	return !config.axis_x_show ? 1 : Math.max(ceil10($$.getAxisWidthByAxisId('x', withoutRecompute)), 40);
	} else if (!config.axis_y_show \|\| config.axis_y_inner) { // && !config.axis_rotated
	return $$.axis.getYAxisLabelPosition().isOuter ? 30 : 1;
	} else {
	return ceil10($$.getAxisWidthByAxisId('y', withoutRecompute));
	}
	};
	c3_chart_internal_fn.getCurrentPaddingRight = function () {
	var $$ = this, config = $$.config,
	defaultPadding = 10, legendWidthOnRight = $$.isLegendRight ? $$.getLegendWidth() + 20 : 0;
	if (isValue(config.padding_right)) {
	return config.padding_right + 1; // 1 is needed not to hide tick line
	} else if (config.axis_rotated) {
	return defaultPadding + legendWidthOnRight;
	} else if (!config.axis_y2_show \|\| config.axis_y2_inner) { // && !config.axis_rotated
	return 2 + legendWidthOnRight + ($$.axis.getY2AxisLabelPosition().isOuter ? 20 : 0);
	} else {
	return ceil10($$.getAxisWidthByAxisId('y2')) + legendWidthOnRight;
	}
	};

	c3_chart_internal_fn.getParentRectValue = function (key) {
	var parent = this.selectChart.node(), v;
	while (parent && parent.tagName !== 'BODY') {
	try {
	v = parent.getBoundingClientRect()[key];
	} catch(e) {
	if (key === 'width') {
	// In IE in certain cases getBoundingClientRect
	// will cause an "unspecified error"
	v = parent.offsetWidth;
	}
	}
	if (v) {
	break;
	}
	parent = parent.parentNode;
	}
	return v;
	};
	c3_chart_internal_fn.getParentWidth = function () {
	return this.getParentRectValue('width');
	};
	c3_chart_internal_fn.getParentHeight = function () {
	var h = this.selectChart.style('height');
	return h.indexOf('px') > 0 ? +h.replace('px', '') : 0;
	};


	c3_chart_internal_fn.getSvgLeft = function (withoutRecompute) {
	var $$ = this, config = $$.config,
	hasLeftAxisRect = config.axis_rotated \|\| (!config.axis_rotated && !config.axis_y_inner),
	leftAxisClass = config.axis_rotated ? CLASS.axisX : CLASS.axisY,
	leftAxis = $$.main.select('.' + leftAxisClass).node(),
	svgRect = leftAxis && hasLeftAxisRect ? leftAxis.getBoundingClientRect() : {right: 0},
	chartRect = $$.selectChart.node().getBoundingClientRect(),
	hasArc = $$.hasArcType(),
	svgLeft = svgRect.right - chartRect.left - (hasArc ? 0 : $$.getCurrentPaddingLeft(withoutRecompute));
	return svgLeft > 0 ? svgLeft : 0;
	};


	c3_chart_internal_fn.getAxisWidthByAxisId = function (id, withoutRecompute) {
	var $$ = this, position = $$.axis.getLabelPositionById(id);
	return $$.axis.getMaxTickWidth(id, withoutRecompute) + (position.isInner ? 20 : 40);
	};
	c3_chart_internal_fn.getHorizontalAxisHeight = function (axisId) {
	var $$ = this, config = $$.config, h = 30;
	if (axisId === 'x' && !config.axis_x_show) { return 8; }
	if (axisId === 'x' && config.axis_x_height) { return config.axis_x_height; }
	if (axisId === 'y' && !config.axis_y_show) { return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1; }
	if (axisId === 'y2' && !config.axis_y2_show) { return $$.rotated_padding_top; }
	// Calculate x axis height when tick rotated
	if (axisId === 'x' && !config.axis_rotated && config.axis_x_tick_rotate) {
	h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - config.axis_x_tick_rotate) / 180);
	}
	return h + ($$.axis.getLabelPositionById(axisId).isInner ? 0 : 10) + (axisId === 'y2' ? -10 : 0);
	};

	c3_chart_internal_fn.getEventRectWidth = function () {
	return Math.max(0, this.xAxis.tickInterval());
	};

	c3_chart_internal_fn.getShapeIndices = function (typeFilter) {
	var $$ = this, config = $$.config,
	indices = {}, i = 0, j, k;
	$$.filterTargetsToShow($$.data.targets.filter(typeFilter, $$)).forEach(function (d) {
	for (j = 0; j < config.data_groups.length; j++) {
	if (config.data_groups[j].indexOf(d.id) < 0) { continue; }
	for (k = 0; k < config.data_groups[j].length; k++) {
	if (config.data_groups[j][k] in indices) {
	indices[d.id] = indices[config.data_groups[j][k]];
	break;
	}
	}
	}
	if (isUndefined(indices[d.id])) { indices[d.id] = i++; }
	});
	indices.__max__ = i - 1;
	return indices;
	};
	c3_chart_internal_fn.getShapeX = function (offset, targetsNum, indices, isSub) {
	var $$ = this, scale = isSub ? $$.subX : $$.x;
	return function (d) {
	var index = d.id in indices ? indices[d.id] : 0;
	return d.x \|\| d.x === 0 ? scale(d.x) - offset * (targetsNum / 2 - index) : 0;
	};
	};
	c3_chart_internal_fn.getShapeY = function (isSub) {
	var $$ = this;
	return function (d) {
	var scale = isSub ? $$.getSubYScale(d.id) : $$.getYScale(d.id);
	return scale(d.value);
	};
	};
	c3_chart_internal_fn.getShapeOffset = function (typeFilter, indices, isSub) {
	var $$ = this,
	targets = $$.orderTargets($$.filterTargetsToShow($$.data.targets.filter(typeFilter, $$))),
	targetIds = targets.map(function (t) { return t.id; });
	return function (d, i) {
	var scale = isSub ? $$.getSubYScale(d.id) : $$.getYScale(d.id),
	y0 = scale(0), offset = y0;
	targets.forEach(function (t) {
	var values = $$.isStepType(d) ? $$.convertValuesToStep(t.values) : t.values;
	if (t.id === d.id \|\| indices[t.id] !== indices[d.id]) { return; }
	if (targetIds.indexOf(t.id) < targetIds.indexOf(d.id)) {
	if (values[i].value * d.value >= 0) {
	offset += scale(values[i].value) - y0;
	}
	}
	});
	return offset;
	};
	};
	c3_chart_internal_fn.isWithinShape = function (that, d) {
	var $$ = this,
	shape = $$.d3.select(that), isWithin;
	if (!$$.isTargetToShow(d.id)) {
	isWithin = false;
	}
	else if (that.nodeName === 'circle') {
	isWithin = $$.isStepType(d) ? $$.isWithinStep(that, $$.getYScale(d.id)(d.value)) : $$.isWithinCircle(that, $$.pointSelectR(d) * 1.5);
	}
	else if (that.nodeName === 'path') {
	isWithin = shape.classed(CLASS.bar) ? $$.isWithinBar(that) : true;
	}
	return isWithin;
	};


	c3_chart_internal_fn.getInterpolate = function (d) {
	var $$ = this;
	return $$.isSplineType(d) ? "cardinal" : $$.isStepType(d) ? $$.config.line_step_type : "linear";
	};

	c3_chart_internal_fn.initLine = function () {
	var $$ = this;
	$$.main.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartLines);
	};
	c3_chart_internal_fn.updateTargetsForLine = function (targets) {
	var $$ = this, config = $$.config,
	mainLineUpdate, mainLineEnter,
	classChartLine = $$.classChartLine.bind($$),
	classLines = $$.classLines.bind($$),
	classAreas = $$.classAreas.bind($$),
	classCircles = $$.classCircles.bind($$),
	classFocus = $$.classFocus.bind($$);
	mainLineUpdate = $$.main.select('.' + CLASS.chartLines).selectAll('.' + CLASS.chartLine)
	.data(targets)
	.attr('class', function (d) { return classChartLine(d) + classFocus(d); });
	mainLineEnter = mainLineUpdate.enter().append('g')
	.attr('class', classChartLine)
	.style('opacity', 0)
	.style("pointer-events", "none");
	// Lines for each data
	mainLineEnter.append('g')
	.attr("class", classLines);
	// Areas
	mainLineEnter.append('g')
	.attr('class', classAreas);
	// Circles for each data point on lines
	mainLineEnter.append('g')
	.attr("class", function (d) { return $$.generateClass(CLASS.selectedCircles, d.id); });
	mainLineEnter.append('g')
	.attr("class", classCircles)
	.style("cursor", function (d) { return config.data_selection_isselectable(d) ? "pointer" : null; });
	// Update date for selected circles
	targets.forEach(function (t) {
	$$.main.selectAll('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(t.id)).selectAll('.' + CLASS.selectedCircle).each(function (d) {
	d.value = t.values[d.index].value;
	});
	});
	// MEMO: can not keep same color...
	//mainLineUpdate.exit().remove();
	};
	c3_chart_internal_fn.updateLine = function (durationForExit) {
	var $$ = this;
	$$.mainLine = $$.main.selectAll('.' + CLASS.lines).selectAll('.' + CLASS.line)
	.data($$.lineData.bind($$));
	$$.mainLine.enter().append('path')
	.attr('class', $$.classLine.bind($$))
	.style("stroke", $$.color);
	$$.mainLine
	.style("opacity", $$.initialOpacity.bind($$))
	.style('shape-rendering', function (d) { return $$.isStepType(d) ? 'crispEdges' : ''; })
	.attr('transform', null);
	$$.mainLine.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawLine = function (drawLine, withTransition) {
	return [
	(withTransition ? this.mainLine.transition() : this.mainLine)
	.attr("d", drawLine)
	.style("stroke", this.color)
	.style("opacity", 1)
	];
	};
	c3_chart_internal_fn.generateDrawLine = function (lineIndices, isSub) {
	var $$ = this, config = $$.config,
	line = $$.d3.svg.line(),
	getPoints = $$.generateGetLinePoints(lineIndices, isSub),
	yScaleGetter = isSub ? $$.getSubYScale : $$.getYScale,
	xValue = function (d) { return (isSub ? $$.subxx : $$.xx).call($$, d); },
	yValue = function (d, i) {
	return config.data_groups.length > 0 ? getPoints(d, i)[0][1] : yScaleGetter.call($$, d.id)(d.value);
	};

	line = config.axis_rotated ? line.x(yValue).y(xValue) : line.x(xValue).y(yValue);
	if (!config.line_connectNull) { line = line.defined(function (d) { return d.value != null; }); }
	return function (d) {
	var values = config.line_connectNull ? $$.filterRemoveNull(d.values) : d.values,
	x = isSub ? $$.x : $$.subX, y = yScaleGetter.call($$, d.id), x0 = 0, y0 = 0, path;
	if ($$.isLineType(d)) {
	if (config.data_regions[d.id]) {
	path = $$.lineWithRegions(values, x, y, config.data_regions[d.id]);
	} else {
	if ($$.isStepType(d)) { values = $$.convertValuesToStep(values); }
	path = line.interpolate($$.getInterpolate(d))(values);
	}
	} else {
	if (values[0]) {
	x0 = x(values[0].x);
	y0 = y(values[0].value);
	}
	path = config.axis_rotated ? "M " + y0 + " " + x0 : "M " + x0 + " " + y0;
	}
	return path ? path : "M 0 0";
	};
	};
	c3_chart_internal_fn.generateGetLinePoints = function (lineIndices, isSub) { // partial duplication of generateGetBarPoints
	var $$ = this, config = $$.config,
	lineTargetsNum = lineIndices.__max__ + 1,
	x = $$.getShapeX(0, lineTargetsNum, lineIndices, !!isSub),
	y = $$.getShapeY(!!isSub),
	lineOffset = $$.getShapeOffset($$.isLineType, lineIndices, !!isSub),
	yScale = isSub ? $$.getSubYScale : $$.getYScale;
	return function (d, i) {
	var y0 = yScale.call($$, d.id)(0),
	offset = lineOffset(d, i) \|\| y0, // offset is for stacked area chart
	posX = x(d), posY = y(d);
	// fix posY not to overflow opposite quadrant
	if (config.axis_rotated) {
	if ((0 < d.value && posY < y0) \|\| (d.value < 0 && y0 < posY)) { posY = y0; }
	}
	// 1 point that marks the line position
	return [
	[posX, posY - (y0 - offset)],
	[posX, posY - (y0 - offset)], // needed for compatibility
	[posX, posY - (y0 - offset)], // needed for compatibility
	[posX, posY - (y0 - offset)] // needed for compatibility
	];
	};
	};


	c3_chart_internal_fn.lineWithRegions = function (d, x, y, _regions) {
	var $$ = this, config = $$.config,
	prev = -1, i, j,
	s = "M", sWithRegion,
	xp, yp, dx, dy, dd, diff, diffx2,
	xOffset = $$.isCategorized() ? 0.5 : 0,
	xValue, yValue,
	regions = [];

	function isWithinRegions(x, regions) {
	var i;
	for (i = 0; i < regions.length; i++) {
	if (regions[i].start < x && x <= regions[i].end) { return true; }
	}
	return false;
	}

	// Check start/end of regions
	if (isDefined(_regions)) {
	for (i = 0; i < _regions.length; i++) {
	regions[i] = {};
	if (isUndefined(_regions[i].start)) {
	regions[i].start = d[0].x;
	} else {
	regions[i].start = $$.isTimeSeries() ? $$.parseDate(_regions[i].start) : _regions[i].start;
	}
	if (isUndefined(_regions[i].end)) {
	regions[i].end = d[d.length - 1].x;
	} else {
	regions[i].end = $$.isTimeSeries() ? $$.parseDate(_regions[i].end) : _regions[i].end;
	}
	}
	}

	// Set scales
	xValue = config.axis_rotated ? function (d) { return y(d.value); } : function (d) { return x(d.x); };
	yValue = config.axis_rotated ? function (d) { return x(d.x); } : function (d) { return y(d.value); };

	// Define svg generator function for region
	function generateM(points) {
	return 'M' + points[0][0] + ' ' + points[0][1] + ' ' + points[1][0] + ' ' + points[1][1];
	}
	if ($$.isTimeSeries()) {
	sWithRegion = function (d0, d1, j, diff) {
	var x0 = d0.x.getTime(), x_diff = d1.x - d0.x,
	xv0 = new Date(x0 + x_diff * j),
	xv1 = new Date(x0 + x_diff * (j + diff)),
	points;
	if (config.axis_rotated) {
	points = [[y(yp(j)), x(xv0)], [y(yp(j + diff)), x(xv1)]];
	} else {
	points = [[x(xv0), y(yp(j))], [x(xv1), y(yp(j + diff))]];
	}
	return generateM(points);
	};
	} else {
	sWithRegion = function (d0, d1, j, diff) {
	var points;
	if (config.axis_rotated) {
	points = [[y(yp(j), true), x(xp(j))], [y(yp(j + diff), true), x(xp(j + diff))]];
	} else {
	points = [[x(xp(j), true), y(yp(j))], [x(xp(j + diff), true), y(yp(j + diff))]];
	}
	return generateM(points);
	};
	}

	// Generate
	for (i = 0; i < d.length; i++) {

	// Draw as normal
	if (isUndefined(regions) \|\| ! isWithinRegions(d[i].x, regions)) {
	s += " " + xValue(d[i]) + " " + yValue(d[i]);
	}
	// Draw with region // TODO: Fix for horizotal charts
	else {
	xp = $$.getScale(d[i - 1].x + xOffset, d[i].x + xOffset, $$.isTimeSeries());
	yp = $$.getScale(d[i - 1].value, d[i].value);

	dx = x(d[i].x) - x(d[i - 1].x);
	dy = y(d[i].value) - y(d[i - 1].value);
	dd = Math.sqrt(Math.pow(dx, 2) + Math.pow(dy, 2));
	diff = 2 / dd;
	diffx2 = diff * 2;

	for (j = diff; j <= 1; j += diffx2) {
	s += sWithRegion(d[i - 1], d[i], j, diff);
	}
	}
	prev = d[i].x;
	}

	return s;
	};


	c3_chart_internal_fn.updateArea = function (durationForExit) {
	var $$ = this, d3 = $$.d3;
	$$.mainArea = $$.main.selectAll('.' + CLASS.areas).selectAll('.' + CLASS.area)
	.data($$.lineData.bind($$));
	$$.mainArea.enter().append('path')
	.attr("class", $$.classArea.bind($$))
	.style("fill", $$.color)
	.style("opacity", function () { $$.orgAreaOpacity = +d3.select(this).style('opacity'); return 0; });
	$$.mainArea
	.style("opacity", $$.orgAreaOpacity);
	$$.mainArea.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawArea = function (drawArea, withTransition) {
	return [
	(withTransition ? this.mainArea.transition() : this.mainArea)
	.attr("d", drawArea)
	.style("fill", this.color)
	.style("opacity", this.orgAreaOpacity)
	];
	};
	c3_chart_internal_fn.generateDrawArea = function (areaIndices, isSub) {
	var $$ = this, config = $$.config, area = $$.d3.svg.area(),
	getPoints = $$.generateGetAreaPoints(areaIndices, isSub),
	yScaleGetter = isSub ? $$.getSubYScale : $$.getYScale,
	xValue = function (d) { return (isSub ? $$.subxx : $$.xx).call($$, d); },
	value0 = function (d, i) {
	return config.data_groups.length > 0 ? getPoints(d, i)[0][1] : yScaleGetter.call($$, d.id)($$.getAreaBaseValue(d.id));
	},
	value1 = function (d, i) {
	return config.data_groups.length > 0 ? getPoints(d, i)[1][1] : yScaleGetter.call($$, d.id)(d.value);
	};

	area = config.axis_rotated ? area.x0(value0).x1(value1).y(xValue) : area.x(xValue).y0(value0).y1(value1);
	if (!config.line_connectNull) {
	area = area.defined(function (d) { return d.value !== null; });
	}

	return function (d) {
	var values = config.line_connectNull ? $$.filterRemoveNull(d.values) : d.values,
	x0 = 0, y0 = 0, path;
	if ($$.isAreaType(d)) {
	if ($$.isStepType(d)) { values = $$.convertValuesToStep(values); }
	path = area.interpolate($$.getInterpolate(d))(values);
	} else {
	if (values[0]) {
	x0 = $$.x(values[0].x);
	y0 = $$.getYScale(d.id)(values[0].value);
	}
	path = config.axis_rotated ? "M " + y0 + " " + x0 : "M " + x0 + " " + y0;
	}
	return path ? path : "M 0 0";
	};
	};
	c3_chart_internal_fn.getAreaBaseValue = function () {
	return 0;
	};
	c3_chart_internal_fn.generateGetAreaPoints = function (areaIndices, isSub) { // partial duplication of generateGetBarPoints
	var $$ = this, config = $$.config,
	areaTargetsNum = areaIndices.__max__ + 1,
	x = $$.getShapeX(0, areaTargetsNum, areaIndices, !!isSub),
	y = $$.getShapeY(!!isSub),
	areaOffset = $$.getShapeOffset($$.isAreaType, areaIndices, !!isSub),
	yScale = isSub ? $$.getSubYScale : $$.getYScale;
	return function (d, i) {
	var y0 = yScale.call($$, d.id)(0),
	offset = areaOffset(d, i) \|\| y0, // offset is for stacked area chart
	posX = x(d), posY = y(d);
	// fix posY not to overflow opposite quadrant
	if (config.axis_rotated) {
	if ((0 < d.value && posY < y0) \|\| (d.value < 0 && y0 < posY)) { posY = y0; }
	}
	// 1 point that marks the area position
	return [
	[posX, offset],
	[posX, posY - (y0 - offset)],
	[posX, posY - (y0 - offset)], // needed for compatibility
	[posX, offset] // needed for compatibility
	];
	};
	};


	c3_chart_internal_fn.updateCircle = function () {
	var $$ = this;
	$$.mainCircle = $$.main.selectAll('.' + CLASS.circles).selectAll('.' + CLASS.circle)
	.data($$.lineOrScatterData.bind($$));
	$$.mainCircle.enter().append("circle")
	.attr("class", $$.classCircle.bind($$))
	.attr("r", $$.pointR.bind($$))
	.style("fill", $$.color);
	$$.mainCircle
	.style("opacity", $$.initialOpacityForCircle.bind($$));
	$$.mainCircle.exit().remove();
	};
	c3_chart_internal_fn.redrawCircle = function (cx, cy, withTransition) {
	var selectedCircles = this.main.selectAll('.' + CLASS.selectedCircle);
	return [
	(withTransition ? this.mainCircle.transition() : this.mainCircle)
	.style('opacity', this.opacityForCircle.bind(this))
	.style("fill", this.color)
	.attr("cx", cx)
	.attr("cy", cy),
	(withTransition ? selectedCircles.transition() : selectedCircles)
	.attr("cx", cx)
	.attr("cy", cy)
	];
	};
	c3_chart_internal_fn.circleX = function (d) {
	return d.x \|\| d.x === 0 ? this.x(d.x) : null;
	};
	c3_chart_internal_fn.updateCircleY = function () {
	var $$ = this, lineIndices, getPoints;
	if ($$.config.data_groups.length > 0) {
	lineIndices = $$.getShapeIndices($$.isLineType),
	getPoints = $$.generateGetLinePoints(lineIndices);
	$$.circleY = function (d, i) {
	return getPoints(d, i)[0][1];
	};
	} else {
	$$.circleY = function (d) {
	return $$.getYScale(d.id)(d.value);
	};
	}
	};
	c3_chart_internal_fn.getCircles = function (i, id) {
	var $$ = this;
	return (id ? $$.main.selectAll('.' + CLASS.circles + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.circle + (isValue(i) ? '-' + i : ''));
	};
	c3_chart_internal_fn.expandCircles = function (i, id, reset) {
	var $$ = this,
	r = $$.pointExpandedR.bind($$);
	if (reset) { $$.unexpandCircles(); }
	$$.getCircles(i, id)
	.classed(CLASS.EXPANDED, true)
	.attr('r', r);
	};
	c3_chart_internal_fn.unexpandCircles = function (i) {
	var $$ = this,
	r = $$.pointR.bind($$);
	$$.getCircles(i)
	.filter(function () { return $$.d3.select(this).classed(CLASS.EXPANDED); })
	.classed(CLASS.EXPANDED, false)
	.attr('r', r);
	};
	c3_chart_internal_fn.pointR = function (d) {
	var $$ = this, config = $$.config;
	return $$.isStepType(d) ? 0 : (isFunction(config.point_r) ? config.point_r(d) : config.point_r);
	};
	c3_chart_internal_fn.pointExpandedR = function (d) {
	var $$ = this, config = $$.config;
	return config.point_focus_expand_enabled ? (config.point_focus_expand_r ? config.point_focus_expand_r : $$.pointR(d) * 1.75) : $$.pointR(d);
	};
	c3_chart_internal_fn.pointSelectR = function (d) {
	var $$ = this, config = $$.config;
	return config.point_select_r ? config.point_select_r : $$.pointR(d) * 4;
	};
	c3_chart_internal_fn.isWithinCircle = function (that, r) {
	var d3 = this.d3,
	mouse = d3.mouse(that), d3_this = d3.select(that),
	cx = +d3_this.attr("cx"), cy = +d3_this.attr("cy");
	return Math.sqrt(Math.pow(cx - mouse[0], 2) + Math.pow(cy - mouse[1], 2)) < r;
	};
	c3_chart_internal_fn.isWithinStep = function (that, y) {
	return Math.abs(y - this.d3.mouse(that)[1]) < 30;
	};

	c3_chart_internal_fn.initBar = function () {
	var $$ = this;
	$$.main.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartBars);
	};
	c3_chart_internal_fn.updateTargetsForBar = function (targets) {
	var $$ = this, config = $$.config,
	mainBarUpdate, mainBarEnter,
	classChartBar = $$.classChartBar.bind($$),
	classBars = $$.classBars.bind($$),
	classFocus = $$.classFocus.bind($$);
	mainBarUpdate = $$.main.select('.' + CLASS.chartBars).selectAll('.' + CLASS.chartBar)
	.data(targets)
	.attr('class', function (d) { return classChartBar(d) + classFocus(d); });
	mainBarEnter = mainBarUpdate.enter().append('g')
	.attr('class', classChartBar)
	.style('opacity', 0)
	.style("pointer-events", "none");
	// Bars for each data
	mainBarEnter.append('g')
	.attr("class", classBars)
	.style("cursor", function (d) { return config.data_selection_isselectable(d) ? "pointer" : null; });

	};
	c3_chart_internal_fn.updateBar = function (durationForExit) {
	var $$ = this,
	barData = $$.barData.bind($$),
	classBar = $$.classBar.bind($$),
	initialOpacity = $$.initialOpacity.bind($$),
	color = function (d) { return $$.color(d.id); };
	$$.mainBar = $$.main.selectAll('.' + CLASS.bars).selectAll('.' + CLASS.bar)
	.data(barData);
	$$.mainBar.enter().append('path')
	.attr("class", classBar)
	.style("stroke", color)
	.style("fill", color);
	$$.mainBar
	.style("opacity", initialOpacity);
	$$.mainBar.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawBar = function (drawBar, withTransition) {
	return [
	(withTransition ? this.mainBar.transition() : this.mainBar)
	.attr('d', drawBar)
	.style("fill", this.color)
	.style("opacity", 1)
	];
	};
	c3_chart_internal_fn.getBarW = function (axis, barTargetsNum) {
	var $$ = this, config = $$.config,
	w = typeof config.bar_width === 'number' ? config.bar_width : barTargetsNum ? (axis.tickInterval() * config.bar_width_ratio) / barTargetsNum : 0;
	return config.bar_width_max && w > config.bar_width_max ? config.bar_width_max : w;
	};
	c3_chart_internal_fn.getBars = function (i, id) {
	var $$ = this;
	return (id ? $$.main.selectAll('.' + CLASS.bars + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.bar + (isValue(i) ? '-' + i : ''));
	};
	c3_chart_internal_fn.expandBars = function (i, id, reset) {
	var $$ = this;
	if (reset) { $$.unexpandBars(); }
	$$.getBars(i, id).classed(CLASS.EXPANDED, true);
	};
	c3_chart_internal_fn.unexpandBars = function (i) {
	var $$ = this;
	$$.getBars(i).classed(CLASS.EXPANDED, false);
	};
	c3_chart_internal_fn.generateDrawBar = function (barIndices, isSub) {
	var $$ = this, config = $$.config,
	getPoints = $$.generateGetBarPoints(barIndices, isSub);
	return function (d, i) {
	// 4 points that make a bar
	var points = getPoints(d, i);

	// switch points if axis is rotated, not applicable for sub chart
	var indexX = config.axis_rotated ? 1 : 0;
	var indexY = config.axis_rotated ? 0 : 1;

	var path = 'M ' + points[0][indexX] + ',' + points[0][indexY] + ' ' +
	'L' + points[1][indexX] + ',' + points[1][indexY] + ' ' +
	'L' + points[2][indexX] + ',' + points[2][indexY] + ' ' +
	'L' + points[3][indexX] + ',' + points[3][indexY] + ' ' +
	'z';

	return path;
	};
	};
	c3_chart_internal_fn.generateGetBarPoints = function (barIndices, isSub) {
	var $$ = this,
	axis = isSub ? $$.subXAxis : $$.xAxis,
	barTargetsNum = barIndices.__max__ + 1,
	barW = $$.getBarW(axis, barTargetsNum),
	barX = $$.getShapeX(barW, barTargetsNum, barIndices, !!isSub),
	barY = $$.getShapeY(!!isSub),
	barOffset = $$.getShapeOffset($$.isBarType, barIndices, !!isSub),
	yScale = isSub ? $$.getSubYScale : $$.getYScale;
	return function (d, i) {
	var y0 = yScale.call($$, d.id)(0),
	offset = barOffset(d, i) \|\| y0, // offset is for stacked bar chart
	posX = barX(d), posY = barY(d);
	// fix posY not to overflow opposite quadrant
	if ($$.config.axis_rotated) {
	if ((0 < d.value && posY < y0) \|\| (d.value < 0 && y0 < posY)) { posY = y0; }
	}
	// 4 points that make a bar
	return [
	[posX, offset],
	[posX, posY - (y0 - offset)],
	[posX + barW, posY - (y0 - offset)],
	[posX + barW, offset]
	];
	};
	};
	c3_chart_internal_fn.isWithinBar = function (that) {
	var mouse = this.d3.mouse(that), box = that.getBoundingClientRect(),
	seg0 = that.pathSegList.getItem(0), seg1 = that.pathSegList.getItem(1),
	x = Math.min(seg0.x, seg1.x), y = Math.min(seg0.y, seg1.y),
	w = box.width, h = box.height, offset = 2,
	sx = x - offset, ex = x + w + offset, sy = y + h + offset, ey = y - offset;
	return sx < mouse[0] && mouse[0] < ex && ey < mouse[1] && mouse[1] < sy;
	};

	c3_chart_internal_fn.initText = function () {
	var $$ = this;
	$$.main.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartTexts);
	$$.mainText = $$.d3.selectAll([]);
	};
	c3_chart_internal_fn.updateTargetsForText = function (targets) {
	var $$ = this, mainTextUpdate, mainTextEnter,
	classChartText = $$.classChartText.bind($$),
	classTexts = $$.classTexts.bind($$),
	classFocus = $$.classFocus.bind($$);
	mainTextUpdate = $$.main.select('.' + CLASS.chartTexts).selectAll('.' + CLASS.chartText)
	.data(targets)
	.attr('class', function (d) { return classChartText(d) + classFocus(d); });
	mainTextEnter = mainTextUpdate.enter().append('g')
	.attr('class', classChartText)
	.style('opacity', 0)
	.style("pointer-events", "none");
	mainTextEnter.append('g')
	.attr('class', classTexts);
	};
	c3_chart_internal_fn.updateText = function (durationForExit) {
	var $$ = this, config = $$.config,
	barOrLineData = $$.barOrLineData.bind($$),
	classText = $$.classText.bind($$);
	$$.mainText = $$.main.selectAll('.' + CLASS.texts).selectAll('.' + CLASS.text)
	.data(barOrLineData);
	$$.mainText.enter().append('text')
	.attr("class", classText)
	.attr('text-anchor', function (d) { return config.axis_rotated ? (d.value < 0 ? 'end' : 'start') : 'middle'; })
	.style("stroke", 'none')
	.style("fill", function (d) { return $$.color(d); })
	.style("fill-opacity", 0);
	$$.mainText
	.text(function (d, i, j) { return $$.dataLabelFormat(d.id)(d.value, d.id, i, j); });
	$$.mainText.exit()
	.transition().duration(durationForExit)
	.style('fill-opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawText = function (xForText, yForText, forFlow, withTransition) {
	return [
	(withTransition ? this.mainText.transition() : this.mainText)
	.attr('x', xForText)
	.attr('y', yForText)
	.style("fill", this.color)
	.style("fill-opacity", forFlow ? 0 : this.opacityForText.bind(this))
	];
	};
	c3_chart_internal_fn.getTextRect = function (text, cls) {
	var dummy = this.d3.select('body').append('div').classed('c3', true),
	svg = dummy.append("svg").style('visibility', 'hidden').style('position', 'fixed').style('top', 0).style('left', 0),
	rect;
	svg.selectAll('.dummy')
	.data([text])
	.enter().append('text')
	.classed(cls ? cls : "", true)
	.text(text)
	.each(function () { rect = this.getBoundingClientRect(); });
	dummy.remove();
	return rect;
	};
	c3_chart_internal_fn.generateXYForText = function (areaIndices, barIndices, lineIndices, forX) {
	var $$ = this,
	getAreaPoints = $$.generateGetAreaPoints(areaIndices, false),
	getBarPoints = $$.generateGetBarPoints(barIndices, false),
	getLinePoints = $$.generateGetLinePoints(lineIndices, false),
	getter = forX ? $$.getXForText : $$.getYForText;
	return function (d, i) {
	var getPoints = $$.isAreaType(d) ? getAreaPoints : $$.isBarType(d) ? getBarPoints : getLinePoints;
	return getter.call($$, getPoints(d, i), d, this);
	};
	};
	c3_chart_internal_fn.getXForText = function (points, d, textElement) {
	var $$ = this,
	box = textElement.getBoundingClientRect(), xPos, padding;
	if ($$.config.axis_rotated) {
	padding = $$.isBarType(d) ? 4 : 6;
	xPos = points[2][1] + padding * (d.value < 0 ? -1 : 1);
	} else {
	xPos = $$.hasType('bar') ? (points[2][0] + points[0][0]) / 2 : points[0][0];
	}
	// show labels regardless of the domain if value is null
	if (d.value === null) {
	if (xPos > $$.width) {
	xPos = $$.width - box.width;
	} else if (xPos < 0) {
	xPos = 4;
	}
	}
	return xPos;
	};
	c3_chart_internal_fn.getYForText = function (points, d, textElement) {
	var $$ = this,
	box = textElement.getBoundingClientRect(),
	yPos;
	if ($$.config.axis_rotated) {
	yPos = (points[0][0] + points[2][0] + box.height * 0.6) / 2;
	} else {
	yPos = points[2][1];
	if (d.value < 0) {
	yPos += box.height;
	if ($$.isBarType(d) && $$.isSafari()) {
	yPos -= 3;
	}
	else if (!$$.isBarType(d) && $$.isChrome()) {
	yPos += 3;
	}
	} else {
	yPos += $$.isBarType(d) ? -3 : -6;
	}
	}
	// show labels regardless of the domain if value is null
	if (d.value === null && !$$.config.axis_rotated) {
	if (yPos < box.height) {
	yPos = box.height;
	} else if (yPos > this.height) {
	yPos = this.height - 4;
	}
	}
	return yPos;
	};

	c3_chart_internal_fn.setTargetType = function (targetIds, type) {
	var $$ = this, config = $$.config;
	$$.mapToTargetIds(targetIds).forEach(function (id) {
	$$.withoutFadeIn[id] = (type === config.data_types[id]);
	config.data_types[id] = type;
	});
	if (!targetIds) {
	config.data_type = type;
	}
	};
	c3_chart_internal_fn.hasType = function (type, targets) {
	var $$ = this, types = $$.config.data_types, has = false;
	targets = targets \|\| $$.data.targets;
	if (targets && targets.length) {
	targets.forEach(function (target) {
	var t = types[target.id];
	if ((t && t.indexOf(type) >= 0) \|\| (!t && type === 'line')) {
	has = true;
	}
	});
	} else if (Object.keys(types).length) {
	Object.keys(types).forEach(function (id) {
	if (types[id] === type) { has = true; }
	});
	} else {
	has = $$.config.data_type === type;
	}
	return has;
	};
	c3_chart_internal_fn.hasArcType = function (targets) {
	return this.hasType('pie', targets) \|\| this.hasType('donut', targets) \|\| this.hasType('gauge', targets);
	};
	c3_chart_internal_fn.isLineType = function (d) {
	var config = this.config, id = isString(d) ? d : d.id;
	return !config.data_types[id] \|\| ['line', 'spline', 'area', 'area-spline', 'step', 'area-step'].indexOf(config.data_types[id]) >= 0;
	};
	c3_chart_internal_fn.isStepType = function (d) {
	var id = isString(d) ? d : d.id;
	return ['step', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
	};
	c3_chart_internal_fn.isSplineType = function (d) {
	var id = isString(d) ? d : d.id;
	return ['spline', 'area-spline'].indexOf(this.config.data_types[id]) >= 0;
	};
	c3_chart_internal_fn.isAreaType = function (d) {
	var id = isString(d) ? d : d.id;
	return ['area', 'area-spline', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
	};
	c3_chart_internal_fn.isBarType = function (d) {
	var id = isString(d) ? d : d.id;
	return this.config.data_types[id] === 'bar';
	};
	c3_chart_internal_fn.isScatterType = function (d) {
	var id = isString(d) ? d : d.id;
	return this.config.data_types[id] === 'scatter';
	};
	c3_chart_internal_fn.isPieType = function (d) {
	var id = isString(d) ? d : d.id;
	return this.config.data_types[id] === 'pie';
	};
	c3_chart_internal_fn.isGaugeType = function (d) {
	var id = isString(d) ? d : d.id;
	return this.config.data_types[id] === 'gauge';
	};
	c3_chart_internal_fn.isDonutType = function (d) {
	var id = isString(d) ? d : d.id;
	return this.config.data_types[id] === 'donut';
	};
	c3_chart_internal_fn.isArcType = function (d) {
	return this.isPieType(d) \|\| this.isDonutType(d) \|\| this.isGaugeType(d);
	};
	c3_chart_internal_fn.lineData = function (d) {
	return this.isLineType(d) ? [d] : [];
	};
	c3_chart_internal_fn.arcData = function (d) {
	return this.isArcType(d.data) ? [d] : [];
	};
	/* not used
	function scatterData(d) {
	return isScatterType(d) ? d.values : [];
	}
	*/
	c3_chart_internal_fn.barData = function (d) {
	return this.isBarType(d) ? d.values : [];
	};
	c3_chart_internal_fn.lineOrScatterData = function (d) {
	return this.isLineType(d) \|\| this.isScatterType(d) ? d.values : [];
	};
	c3_chart_internal_fn.barOrLineData = function (d) {
	return this.isBarType(d) \|\| this.isLineType(d) ? d.values : [];
	};

	c3_chart_internal_fn.initGrid = function () {
	var $$ = this, config = $$.config, d3 = $$.d3;
	$$.grid = $$.main.append('g')
	.attr("clip-path", $$.clipPathForGrid)
	.attr('class', CLASS.grid);
	if (config.grid_x_show) {
	$$.grid.append("g").attr("class", CLASS.xgrids);
	}
	if (config.grid_y_show) {
	$$.grid.append('g').attr('class', CLASS.ygrids);
	}
	if (config.grid_focus_show) {
	$$.grid.append('g')
	.attr("class", CLASS.xgridFocus)
	.append('line')
	.attr('class', CLASS.xgridFocus);
	}
	$$.xgrid = d3.selectAll([]);
	if (!config.grid_lines_front) { $$.initGridLines(); }
	};
	c3_chart_internal_fn.initGridLines = function () {
	var $$ = this, d3 = $$.d3;
	$$.gridLines = $$.main.append('g')
	.attr("clip-path", $$.clipPathForGrid)
	.attr('class', CLASS.grid + ' ' + CLASS.gridLines);
	$$.gridLines.append('g').attr("class", CLASS.xgridLines);
	$$.gridLines.append('g').attr('class', CLASS.ygridLines);
	$$.xgridLines = d3.selectAll([]);
	};
	c3_chart_internal_fn.updateXGrid = function (withoutUpdate) {
	var $$ = this, config = $$.config, d3 = $$.d3,
	xgridData = $$.generateGridData(config.grid_x_type, $$.x),
	tickOffset = $$.isCategorized() ? $$.xAxis.tickOffset() : 0;

	$$.xgridAttr = config.axis_rotated ? {
	'x1': 0,
	'x2': $$.width,
	'y1': function (d) { return $$.x(d) - tickOffset; },
	'y2': function (d) { return $$.x(d) - tickOffset; }
	} : {
	'x1': function (d) { return $$.x(d) + tickOffset; },
	'x2': function (d) { return $$.x(d) + tickOffset; },
	'y1': 0,
	'y2': $$.height
	};

	$$.xgrid = $$.main.select('.' + CLASS.xgrids).selectAll('.' + CLASS.xgrid)
	.data(xgridData);
	$$.xgrid.enter().append('line').attr("class", CLASS.xgrid);
	if (!withoutUpdate) {
	$$.xgrid.attr($$.xgridAttr)
	.style("opacity", function () { return +d3.select(this).attr(config.axis_rotated ? 'y1' : 'x1') === (config.axis_rotated ? $$.height : 0) ? 0 : 1; });
	}
	$$.xgrid.exit().remove();
	};

	c3_chart_internal_fn.updateYGrid = function () {
	var $$ = this, config = $$.config,
	gridValues = $$.yAxis.tickValues() \|\| $$.y.ticks(config.grid_y_ticks);
	$$.ygrid = $$.main.select('.' + CLASS.ygrids).selectAll('.' + CLASS.ygrid)
	.data(gridValues);
	$$.ygrid.enter().append('line')
	.attr('class', CLASS.ygrid);
	$$.ygrid.attr("x1", config.axis_rotated ? $$.y : 0)
	.attr("x2", config.axis_rotated ? $$.y : $$.width)
	.attr("y1", config.axis_rotated ? 0 : $$.y)
	.attr("y2", config.axis_rotated ? $$.height : $$.y);
	$$.ygrid.exit().remove();
	$$.smoothLines($$.ygrid, 'grid');
	};

	c3_chart_internal_fn.gridTextAnchor = function (d) {
	return d.position ? d.position : "end";
	};
	c3_chart_internal_fn.gridTextDx = function (d) {
	return d.position === 'start' ? 4 : d.position === 'middle' ? 0 : -4;
	};
	c3_chart_internal_fn.xGridTextX = function (d) {
	return d.position === 'start' ? -this.height : d.position === 'middle' ? -this.height / 2 : 0;
	};
	c3_chart_internal_fn.yGridTextX = function (d) {
	return d.position === 'start' ? 0 : d.position === 'middle' ? this.width / 2 : this.width;
	};
	c3_chart_internal_fn.updateGrid = function (duration) {
	var $$ = this, main = $$.main, config = $$.config,
	xgridLine, ygridLine, yv;

	// hide if arc type
	$$.grid.style('visibility', $$.hasArcType() ? 'hidden' : 'visible');

	main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
	if (config.grid_x_show) {
	$$.updateXGrid();
	}
	$$.xgridLines = main.select('.' + CLASS.xgridLines).selectAll('.' + CLASS.xgridLine)
	.data(config.grid_x_lines);
	// enter
	xgridLine = $$.xgridLines.enter().append('g')
	.attr("class", function (d) { return CLASS.xgridLine + (d['class'] ? ' ' + d['class'] : ''); });
	xgridLine.append('line')
	.style("opacity", 0);
	xgridLine.append('text')
	.attr("text-anchor", $$.gridTextAnchor)
	.attr("transform", config.axis_rotated ? "" : "rotate(-90)")
	.attr('dx', $$.gridTextDx)
	.attr('dy', -5)
	.style("opacity", 0);
	// udpate
	// done in d3.transition() of the end of this function
	// exit
	$$.xgridLines.exit().transition().duration(duration)
	.style("opacity", 0)
	.remove();

	// Y-Grid
	if (config.grid_y_show) {
	$$.updateYGrid();
	}
	$$.ygridLines = main.select('.' + CLASS.ygridLines).selectAll('.' + CLASS.ygridLine)
	.data(config.grid_y_lines);
	// enter
	ygridLine = $$.ygridLines.enter().append('g')
	.attr("class", function (d) { return CLASS.ygridLine + (d['class'] ? ' ' + d['class'] : ''); });
	ygridLine.append('line')
	.style("opacity", 0);
	ygridLine.append('text')
	.attr("text-anchor", $$.gridTextAnchor)
	.attr("transform", config.axis_rotated ? "rotate(-90)" : "")
	.attr('dx', $$.gridTextDx)
	.attr('dy', -5)
	.style("opacity", 0);
	// update
	yv = $$.yv.bind($$);
	$$.ygridLines.select('line')
	.transition().duration(duration)
	.attr("x1", config.axis_rotated ? yv : 0)
	.attr("x2", config.axis_rotated ? yv : $$.width)
	.attr("y1", config.axis_rotated ? 0 : yv)
	.attr("y2", config.axis_rotated ? $$.height : yv)
	.style("opacity", 1);
	$$.ygridLines.select('text')
	.transition().duration(duration)
	.attr("x", config.axis_rotated ? $$.xGridTextX.bind($$) : $$.yGridTextX.bind($$))
	.attr("y", yv)
	.text(function (d) { return d.text; })
	.style("opacity", 1);
	// exit
	$$.ygridLines.exit().transition().duration(duration)
	.style("opacity", 0)
	.remove();
	};
	c3_chart_internal_fn.redrawGrid = function (withTransition) {
	var $$ = this, config = $$.config, xv = $$.xv.bind($$),
	lines = $$.xgridLines.select('line'),
	texts = $$.xgridLines.select('text');
	return [
	(withTransition ? lines.transition() : lines)
	.attr("x1", config.axis_rotated ? 0 : xv)
	.attr("x2", config.axis_rotated ? $$.width : xv)
	.attr("y1", config.axis_rotated ? xv : 0)
	.attr("y2", config.axis_rotated ? xv : $$.height)
	.style("opacity", 1),
	(withTransition ? texts.transition() : texts)
	.attr("x", config.axis_rotated ? $$.yGridTextX.bind($$) : $$.xGridTextX.bind($$))
	.attr("y", xv)
	.text(function (d) { return d.text; })
	.style("opacity", 1)
	];
	};
	c3_chart_internal_fn.showXGridFocus = function (selectedData) {
	var $$ = this, config = $$.config,
	dataToShow = selectedData.filter(function (d) { return d && isValue(d.value); }),
	focusEl = $$.main.selectAll('line.' + CLASS.xgridFocus),
	xx = $$.xx.bind($$);
	if (! config.tooltip_show) { return; }
	// Hide when scatter plot exists
	if ($$.hasType('scatter') \|\| $$.hasArcType()) { return; }
	focusEl
	.style("visibility", "visible")
	.data([dataToShow[0]])
	.attr(config.axis_rotated ? 'y1' : 'x1', xx)
	.attr(config.axis_rotated ? 'y2' : 'x2', xx);
	$$.smoothLines(focusEl, 'grid');
	};
	c3_chart_internal_fn.hideXGridFocus = function () {
	this.main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
	};
	c3_chart_internal_fn.updateXgridFocus = function () {
	var $$ = this, config = $$.config;
	$$.main.select('line.' + CLASS.xgridFocus)
	.attr("x1", config.axis_rotated ? 0 : -10)
	.attr("x2", config.axis_rotated ? $$.width : -10)
	.attr("y1", config.axis_rotated ? -10 : 0)
	.attr("y2", config.axis_rotated ? -10 : $$.height);
	};
	c3_chart_internal_fn.generateGridData = function (type, scale) {
	var $$ = this,
	gridData = [], xDomain, firstYear, lastYear, i,
	tickNum = $$.main.select("." + CLASS.axisX).selectAll('.tick').size();
	if (type === 'year') {
	xDomain = $$.getXDomain();
	firstYear = xDomain[0].getFullYear();
	lastYear = xDomain[1].getFullYear();
	for (i = firstYear; i <= lastYear; i++) {
	gridData.push(new Date(i + '-01-01 00:00:00'));
	}
	} else {
	gridData = scale.ticks(10);
	if (gridData.length > tickNum) { // use only int
	gridData = gridData.filter(function (d) { return ("" + d).indexOf('.') < 0; });
	}
	}
	return gridData;
	};
	c3_chart_internal_fn.getGridFilterToRemove = function (params) {
	return params ? function (line) {
	var found = false;
	[].concat(params).forEach(function (param) {
	if ((('value' in param && line.value === param.value) \|\| ('class' in param && line['class'] === param['class']))) {
	found = true;
	}
	});
	return found;
	} : function () { return true; };
	};
	c3_chart_internal_fn.removeGridLines = function (params, forX) {
	var $$ = this, config = $$.config,
	toRemove = $$.getGridFilterToRemove(params),
	toShow = function (line) { return !toRemove(line); },
	classLines = forX ? CLASS.xgridLines : CLASS.ygridLines,
	classLine = forX ? CLASS.xgridLine : CLASS.ygridLine;
	$$.main.select('.' + classLines).selectAll('.' + classLine).filter(toRemove)
	.transition().duration(config.transition_duration)
	.style('opacity', 0).remove();
	if (forX) {
	config.grid_x_lines = config.grid_x_lines.filter(toShow);
	} else {
	config.grid_y_lines = config.grid_y_lines.filter(toShow);
	}
	};

	c3_chart_internal_fn.initTooltip = function () {
	var $$ = this, config = $$.config, i;
	$$.tooltip = $$.selectChart
	.style("position", "relative")
	.append("div")
	.attr('class', CLASS.tooltipContainer)
	.style("position", "absolute")
	.style("pointer-events", "none")
	.style("display", "none");
	// Show tooltip if needed
	if (config.tooltip_init_show) {
	if ($$.isTimeSeries() && isString(config.tooltip_init_x)) {
	config.tooltip_init_x = $$.parseDate(config.tooltip_init_x);
	for (i = 0; i < $$.data.targets[0].values.length; i++) {
	if (($$.data.targets[0].values[i].x - config.tooltip_init_x) === 0) { break; }
	}
	config.tooltip_init_x = i;
	}
	$$.tooltip.html(config.tooltip_contents.call($$, $$.data.targets.map(function (d) {
	return $$.addName(d.values[config.tooltip_init_x]);
	}), $$.axis.getXAxisTickFormat(), $$.getYFormat($$.hasArcType()), $$.color));
	$$.tooltip.style("top", config.tooltip_init_position.top)
	.style("left", config.tooltip_init_position.left)
	.style("display", "block");
	}
	};
	c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
	var $$ = this, config = $$.config,
	titleFormat = config.tooltip_format_title \|\| defaultTitleFormat,
	nameFormat = config.tooltip_format_name \|\| function (name) { return name; },
	valueFormat = config.tooltip_format_value \|\| defaultValueFormat,
	text, i, title, value, name, bgcolor;
	for (i = 0; i < d.length; i++) {
	if (! (d[i] && (d[i].value \|\| d[i].value === 0))) { continue; }

	if (! text) {
	title = titleFormat ? titleFormat(d[i].x) : d[i].x;
	text = "<table class='" + CLASS.tooltip + "'>" + (title \|\| title === 0 ? "<tr><th colspan='2'>" + title + "</th></tr>" : "");
	}

	value = valueFormat(d[i].value, d[i].ratio, d[i].id, d[i].index);
	if (value !== undefined) {
	name = nameFormat(d[i].name, d[i].ratio, d[i].id, d[i].index);
	bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);

	text += "<tr class='" + CLASS.tooltipName + "-" + d[i].id + "'>";
	text += "<td class='name'><span style='background-color:" + bgcolor + "'></span>" + name + "</td>";
	text += "<td class='value'>" + value + "</td>";
	text += "</tr>";
	}
	}
	return text + "</table>";
	};
	c3_chart_internal_fn.tooltipPosition = function (dataToShow, tWidth, tHeight, element) {
	var $$ = this, config = $$.config, d3 = $$.d3;
	var svgLeft, tooltipLeft, tooltipRight, tooltipTop, chartRight;
	var forArc = $$.hasArcType(),
	mouse = d3.mouse(element);
	// Determin tooltip position
	if (forArc) {
	tooltipLeft = (($$.width - ($$.isLegendRight ? $$.getLegendWidth() : 0)) / 2) + mouse[0];
	tooltipTop = ($$.height / 2) + mouse[1] + 20;
	} else {
	svgLeft = $$.getSvgLeft(true);
	if (config.axis_rotated) {
	tooltipLeft = svgLeft + mouse[0] + 100;
	tooltipRight = tooltipLeft + tWidth;
	chartRight = $$.currentWidth - $$.getCurrentPaddingRight();
	tooltipTop = $$.x(dataToShow[0].x) + 20;
	} else {
	tooltipLeft = svgLeft + $$.getCurrentPaddingLeft(true) + $$.x(dataToShow[0].x) + 20;
	tooltipRight = tooltipLeft + tWidth;
	chartRight = svgLeft + $$.currentWidth - $$.getCurrentPaddingRight();
	tooltipTop = mouse[1] + 15;
	}

	if (tooltipRight > chartRight) {
	// 20 is needed for Firefox to keep tooletip width
	tooltipLeft -= tooltipRight - chartRight + 20;
	}
	if (tooltipTop + tHeight > $$.currentHeight) {
	tooltipTop -= tHeight + 30;
	}
	}
	if (tooltipTop < 0) {
	tooltipTop = 0;
	}
	return {top: tooltipTop, left: tooltipLeft};
	};
	c3_chart_internal_fn.showTooltip = function (selectedData, element) {
	var $$ = this, config = $$.config;
	var tWidth, tHeight, position;
	var forArc = $$.hasArcType(),
	dataToShow = selectedData.filter(function (d) { return d && isValue(d.value); }),
	positionFunction = config.tooltip_position \|\| c3_chart_internal_fn.tooltipPosition;
	if (dataToShow.length === 0 \|\| !config.tooltip_show) {
	return;
	}
	$$.tooltip.html(config.tooltip_contents.call($$, selectedData, $$.axis.getXAxisTickFormat(), $$.getYFormat(forArc), $$.color)).style("display", "block");

	// Get tooltip dimensions
	tWidth = $$.tooltip.property('offsetWidth');
	tHeight = $$.tooltip.property('offsetHeight');

	position = positionFunction.call(this, dataToShow, tWidth, tHeight, element);
	// Set tooltip
	$$.tooltip
	.style("top", position.top + "px")
	.style("left", position.left + 'px');
	};
	c3_chart_internal_fn.hideTooltip = function () {
	this.tooltip.style("display", "none");
	};

	c3_chart_internal_fn.initLegend = function () {
	var $$ = this;
	$$.legendItemTextBox = {};
	$$.legendHasRendered = false;
	$$.legend = $$.svg.append("g").attr("transform", $$.getTranslate('legend'));
	if (!$$.config.legend_show) {
	$$.legend.style('visibility', 'hidden');
	$$.hiddenLegendIds = $$.mapToIds($$.data.targets);
	return;
	}
	// MEMO: call here to update legend box and tranlate for all
	// MEMO: translate will be upated by this, so transform not needed in updateLegend()
	$$.updateLegendWithDefaults();
	};
	c3_chart_internal_fn.updateLegendWithDefaults = function () {
	var $$ = this;
	$$.updateLegend($$.mapToIds($$.data.targets), {withTransform: false, withTransitionForTransform: false, withTransition: false});
	};
	c3_chart_internal_fn.updateSizeForLegend = function (legendHeight, legendWidth) {
	var $$ = this, config = $$.config, insetLegendPosition = {
	top: $$.isLegendTop ? $$.getCurrentPaddingTop() + config.legend_inset_y + 5.5 : $$.currentHeight - legendHeight - $$.getCurrentPaddingBottom() - config.legend_inset_y,
	left: $$.isLegendLeft ? $$.getCurrentPaddingLeft() + config.legend_inset_x + 0.5 : $$.currentWidth - legendWidth - $$.getCurrentPaddingRight() - config.legend_inset_x + 0.5
	};

	$$.margin3 = {
	top: $$.isLegendRight ? 0 : $$.isLegendInset ? insetLegendPosition.top : $$.currentHeight - legendHeight,
	right: NaN,
	bottom: 0,
	left: $$.isLegendRight ? $$.currentWidth - legendWidth : $$.isLegendInset ? insetLegendPosition.left : 0
	};
	};
	c3_chart_internal_fn.transformLegend = function (withTransition) {
	var $$ = this;
	(withTransition ? $$.legend.transition() : $$.legend).attr("transform", $$.getTranslate('legend'));
	};
	c3_chart_internal_fn.updateLegendStep = function (step) {
	this.legendStep = step;
	};
	c3_chart_internal_fn.updateLegendItemWidth = function (w) {
	this.legendItemWidth = w;
	};
	c3_chart_internal_fn.updateLegendItemHeight = function (h) {
	this.legendItemHeight = h;
	};
	c3_chart_internal_fn.getLegendWidth = function () {
	var $$ = this;
	return $$.config.legend_show ? $$.isLegendRight \|\| $$.isLegendInset ? $$.legendItemWidth * ($$.legendStep + 1) : $$.currentWidth : 0;
	};
	c3_chart_internal_fn.getLegendHeight = function () {
	var $$ = this, h = 0;
	if ($$.config.legend_show) {
	if ($$.isLegendRight) {
	h = $$.currentHeight;
	} else {
	h = Math.max(20, $$.legendItemHeight) * ($$.legendStep + 1);
	}
	}
	return h;
	};
	c3_chart_internal_fn.opacityForLegend = function (legendItem) {
	return legendItem.classed(CLASS.legendItemHidden) ? null : 1;
	};
	c3_chart_internal_fn.opacityForUnfocusedLegend = function (legendItem) {
	return legendItem.classed(CLASS.legendItemHidden) ? null : 0.3;
	};
	c3_chart_internal_fn.toggleFocusLegend = function (targetIds, focus) {
	var $$ = this;
	targetIds = $$.mapToTargetIds(targetIds);
	$$.legend.selectAll('.' + CLASS.legendItem)
	.filter(function (id) { return targetIds.indexOf(id) >= 0; })
	.classed(CLASS.legendItemFocused, focus)
	.transition().duration(100)
	.style('opacity', function () {
	var opacity = focus ? $$.opacityForLegend : $$.opacityForUnfocusedLegend;
	return opacity.call($$, $$.d3.select(this));
	});
	};
	c3_chart_internal_fn.revertLegend = function () {
	var $$ = this, d3 = $$.d3;
	$$.legend.selectAll('.' + CLASS.legendItem)
	.classed(CLASS.legendItemFocused, false)
	.transition().duration(100)
	.style('opacity', function () { return $$.opacityForLegend(d3.select(this)); });
	};
	c3_chart_internal_fn.showLegend = function (targetIds) {
	var $$ = this, config = $$.config;
	if (!config.legend_show) {
	config.legend_show = true;
	$$.legend.style('visibility', 'visible');
	if (!$$.legendHasRendered) {
	$$.updateLegendWithDefaults();
	}
	}
	$$.removeHiddenLegendIds(targetIds);
	$$.legend.selectAll($$.selectorLegends(targetIds))
	.style('visibility', 'visible')
	.transition()
	.style('opacity', function () { return $$.opacityForLegend($$.d3.select(this)); });
	};
	c3_chart_internal_fn.hideLegend = function (targetIds) {
	var $$ = this, config = $$.config;
	if (config.legend_show && isEmpty(targetIds)) {
	config.legend_show = false;
	$$.legend.style('visibility', 'hidden');
	}
	$$.addHiddenLegendIds(targetIds);
	$$.legend.selectAll($$.selectorLegends(targetIds))
	.style('opacity', 0)
	.style('visibility', 'hidden');
	};
	c3_chart_internal_fn.clearLegendItemTextBoxCache = function () {
	this.legendItemTextBox = {};
	};
	c3_chart_internal_fn.updateLegend = function (targetIds, options, transitions) {
	var $$ = this, config = $$.config;
	var xForLegend, xForLegendText, xForLegendRect, yForLegend, yForLegendText, yForLegendRect;
	var paddingTop = 4, paddingRight = 10, maxWidth = 0, maxHeight = 0, posMin = 10, tileWidth = 15;
	var l, totalLength = 0, offsets = {}, widths = {}, heights = {}, margins = [0], steps = {}, step = 0;
	var withTransition, withTransitionForTransform;
	var texts, rects, tiles, background;

	options = options \|\| {};
	withTransition = getOption(options, "withTransition", true);
	withTransitionForTransform = getOption(options, "withTransitionForTransform", true);

	function getTextBox(textElement, id) {
	if (!$$.legendItemTextBox[id]) {
	$$.legendItemTextBox[id] = $$.getTextRect(textElement.textContent, CLASS.legendItem);
	}
	return $$.legendItemTextBox[id];
	}

	function updatePositions(textElement, id, index) {
	var reset = index === 0, isLast = index === targetIds.length - 1,
	box = getTextBox(textElement, id),
	itemWidth = box.width + tileWidth + (isLast && !($$.isLegendRight \|\| $$.isLegendInset) ? 0 : paddingRight),
	itemHeight = box.height + paddingTop,
	itemLength = $$.isLegendRight \|\| $$.isLegendInset ? itemHeight : itemWidth,
	areaLength = $$.isLegendRight \|\| $$.isLegendInset ? $$.getLegendHeight() : $$.getLegendWidth(),
	margin, maxLength;

	// MEMO: care about condifion of step, totalLength
	function updateValues(id, withoutStep) {
	if (!withoutStep) {
	margin = (areaLength - totalLength - itemLength) / 2;
	if (margin < posMin) {
	margin = (areaLength - itemLength) / 2;
	totalLength = 0;
	step++;
	}
	}
	steps[id] = step;
	margins[step] = $$.isLegendInset ? 10 : margin;
	offsets[id] = totalLength;
	totalLength += itemLength;
	}

	if (reset) {
	totalLength = 0;
	step = 0;
	maxWidth = 0;
	maxHeight = 0;
	}

	if (config.legend_show && !$$.isLegendToShow(id)) {
	widths[id] = heights[id] = steps[id] = offsets[id] = 0;
	return;
	}

	widths[id] = itemWidth;
	heights[id] = itemHeight;

	if (!maxWidth \|\| itemWidth >= maxWidth) { maxWidth = itemWidth; }
	if (!maxHeight \|\| itemHeight >= maxHeight) { maxHeight = itemHeight; }
	maxLength = $$.isLegendRight \|\| $$.isLegendInset ? maxHeight : maxWidth;

	if (config.legend_equally) {
	Object.keys(widths).forEach(function (id) { widths[id] = maxWidth; });
	Object.keys(heights).forEach(function (id) { heights[id] = maxHeight; });
	margin = (areaLength - maxLength * targetIds.length) / 2;
	if (margin < posMin) {
	totalLength = 0;
	step = 0;
	targetIds.forEach(function (id) { updateValues(id); });
	}
	else {
	updateValues(id, true);
	}
	} else {
	updateValues(id);
	}
	}

	if ($$.isLegendInset) {
	step = config.legend_inset_step ? config.legend_inset_step : targetIds.length;
	$$.updateLegendStep(step);
	}

	if ($$.isLegendRight) {
	xForLegend = function (id) { return maxWidth * steps[id]; };
	yForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
	} else if ($$.isLegendInset) {
	xForLegend = function (id) { return maxWidth * steps[id] + 10; };
	yForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
	} else {
	xForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
	yForLegend = function (id) { return maxHeight * steps[id]; };
	}
	xForLegendText = function (id, i) { return xForLegend(id, i) + 14; };
	yForLegendText = function (id, i) { return yForLegend(id, i) + 9; };
	xForLegendRect = function (id, i) { return xForLegend(id, i); };
	yForLegendRect = function (id, i) { return yForLegend(id, i) - 5; };

	// Define g for legend area
	l = $$.legend.selectAll('.' + CLASS.legendItem)
	.data(targetIds)
	.enter().append('g')
	.attr('class', function (id) { return $$.generateClass(CLASS.legendItem, id); })
	.style('visibility', function (id) { return $$.isLegendToShow(id) ? 'visible' : 'hidden'; })
	.style('cursor', 'pointer')
	.on('click', function (id) {
	if (config.legend_item_onclick) {
	config.legend_item_onclick.call($$, id);
	} else {
	if ($$.d3.event.altKey) {
	$$.api.hide();
	$$.api.show(id);
	} else {
	$$.api.toggle(id);
	$$.isTargetToShow(id) ? $$.api.focus(id) : $$.api.revert();
	}
	}
	})
	.on('mouseover', function (id) {
	$$.d3.select(this).classed(CLASS.legendItemFocused, true);
	if (!$$.transiting && $$.isTargetToShow(id)) {
	$$.api.focus(id);
	}
	if (config.legend_item_onmouseover) {
	config.legend_item_onmouseover.call($$, id);
	}
	})
	.on('mouseout', function (id) {
	$$.d3.select(this).classed(CLASS.legendItemFocused, false);
	$$.api.revert();
	if (config.legend_item_onmouseout) {
	config.legend_item_onmouseout.call($$, id);
	}
	});
	l.append('text')
	.text(function (id) { return isDefined(config.data_names[id]) ? config.data_names[id] : id; })
	.each(function (id, i) { updatePositions(this, id, i); })
	.style("pointer-events", "none")
	.attr('x', $$.isLegendRight \|\| $$.isLegendInset ? xForLegendText : -200)
	.attr('y', $$.isLegendRight \|\| $$.isLegendInset ? -200 : yForLegendText);
	l.append('rect')
	.attr("class", CLASS.legendItemEvent)
	.style('fill-opacity', 0)
	.attr('x', $$.isLegendRight \|\| $$.isLegendInset ? xForLegendRect : -200)
	.attr('y', $$.isLegendRight \|\| $$.isLegendInset ? -200 : yForLegendRect);
	l.append('rect')
	.attr("class", CLASS.legendItemTile)
	.style("pointer-events", "none")
	.style('fill', $$.color)
	.attr('x', $$.isLegendRight \|\| $$.isLegendInset ? xForLegendText : -200)
	.attr('y', $$.isLegendRight \|\| $$.isLegendInset ? -200 : yForLegend)
	.attr('width', 10)
	.attr('height', 10);

	// Set background for inset legend
	background = $$.legend.select('.' + CLASS.legendBackground + ' rect');
	if ($$.isLegendInset && maxWidth > 0 && background.size() === 0) {
	background = $$.legend.insert('g', '.' + CLASS.legendItem)
	.attr("class", CLASS.legendBackground)
	.append('rect');
	}

	texts = $$.legend.selectAll('text')
	.data(targetIds)
	.text(function (id) { return isDefined(config.data_names[id]) ? config.data_names[id] : id; }) // MEMO: needed for update
	.each(function (id, i) { updatePositions(this, id, i); });
	(withTransition ? texts.transition() : texts)
	.attr('x', xForLegendText)
	.attr('y', yForLegendText);

	rects = $$.legend.selectAll('rect.' + CLASS.legendItemEvent)
	.data(targetIds);
	(withTransition ? rects.transition() : rects)
	.attr('width', function (id) { return widths[id]; })
	.attr('height', function (id) { return heights[id]; })
	.attr('x', xForLegendRect)
	.attr('y', yForLegendRect);

	tiles = $$.legend.selectAll('rect.' + CLASS.legendItemTile)
	.data(targetIds);
	(withTransition ? tiles.transition() : tiles)
	.style('fill', $$.color)
	.attr('x', xForLegend)
	.attr('y', yForLegend);

	if (background) {
	(withTransition ? background.transition() : background)
	.attr('height', $$.getLegendHeight() - 12)
	.attr('width', maxWidth * (step + 1) + 10);
	}

	// toggle legend state
	$$.legend.selectAll('.' + CLASS.legendItem)
	.classed(CLASS.legendItemHidden, function (id) { return !$$.isTargetToShow(id); });

	// Update all to reflect change of legend
	$$.updateLegendItemWidth(maxWidth);
	$$.updateLegendItemHeight(maxHeight);
	$$.updateLegendStep(step);
	// Update size and scale
	$$.updateSizes();
	$$.updateScales();
	$$.updateSvgSize();
	// Update g positions
	$$.transformAll(withTransitionForTransform, transitions);
	$$.legendHasRendered = true;
	};

	function Axis(owner) {
	API.call(this, owner);
	}

	inherit(API, Axis);

	Axis.prototype.init = function init() {

	var $$ = this.owner, config = $$.config, main = $$.main;
	$$.axes.x = main.append("g")
	.attr("class", CLASS.axis + ' ' + CLASS.axisX)
	.attr("clip-path", $$.clipPathForXAxis)
	.attr("transform", $$.getTranslate('x'))
	.style("visibility", config.axis_x_show ? 'visible' : 'hidden');
	$$.axes.x.append("text")
	.attr("class", CLASS.axisXLabel)
	.attr("transform", config.axis_rotated ? "rotate(-90)" : "")
	.style("text-anchor", this.textAnchorForXAxisLabel.bind(this));
	$$.axes.y = main.append("g")
	.attr("class", CLASS.axis + ' ' + CLASS.axisY)
	.attr("clip-path", config.axis_y_inner ? "" : $$.clipPathForYAxis)
	.attr("transform", $$.getTranslate('y'))
	.style("visibility", config.axis_y_show ? 'visible' : 'hidden');
	$$.axes.y.append("text")
	.attr("class", CLASS.axisYLabel)
	.attr("transform", config.axis_rotated ? "" : "rotate(-90)")
	.style("text-anchor", this.textAnchorForYAxisLabel.bind(this));

	$$.axes.y2 = main.append("g")
	.attr("class", CLASS.axis + ' ' + CLASS.axisY2)
	// clip-path?
	.attr("transform", $$.getTranslate('y2'))
	.style("visibility", config.axis_y2_show ? 'visible' : 'hidden');
	$$.axes.y2.append("text")
	.attr("class", CLASS.axisY2Label)
	.attr("transform", config.axis_rotated ? "" : "rotate(-90)")
	.style("text-anchor", this.textAnchorForY2AxisLabel.bind(this));
	};
	Axis.prototype.getXAxis = function getXAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
	var $$ = this.owner, config = $$.config,
	axisParams = {
	isCategory: $$.isCategorized(),
	withOuterTick: withOuterTick,
	tickMultiline: config.axis_x_tick_multiline,
	tickWidth: config.axis_x_tick_width,
	tickTextRotate: withoutRotateTickText ? 0 : config.axis_x_tick_rotate,
	withoutTransition: withoutTransition,
	},
	axis = c3_axis($$.d3, axisParams).scale(scale).orient(orient);

	if ($$.isTimeSeries() && tickValues) {
	tickValues = tickValues.map(function (v) { return $$.parseDate(v); });
	}

	// Set tick
	axis.tickFormat(tickFormat).tickValues(tickValues);
	if ($$.isCategorized()) {
	axis.tickCentered(config.axis_x_tick_centered);
	if (isEmpty(config.axis_x_tick_culling)) {
	config.axis_x_tick_culling = false;
	}
	}

	return axis;
	};
	Axis.prototype.updateXAxisTickValues = function updateXAxisTickValues(targets, axis) {
	var $$ = this.owner, config = $$.config, tickValues;
	if (config.axis_x_tick_fit \|\| config.axis_x_tick_count) {
	tickValues = this.generateTickValues($$.mapTargetsToUniqueXs(targets), config.axis_x_tick_count, $$.isTimeSeries());
	}
	if (axis) {
	axis.tickValues(tickValues);
	} else {
	$$.xAxis.tickValues(tickValues);
	$$.subXAxis.tickValues(tickValues);
	}
	return tickValues;
	};
	Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition) {
	var axisParams = {
	withOuterTick: withOuterTick,
	withoutTransition: withoutTransition,
	},
	$$ = this.owner,
	d3 = $$.d3,
	config = $$.config,
	axis = c3_axis(d3, axisParams).scale(scale).orient(orient).tickFormat(tickFormat);
	if ($$.isTimeSeriesY()) {
	axis.ticks(d3.time[config.axis_y_tick_time_value], config.axis_y_tick_time_interval);
	} else {
	axis.tickValues(tickValues);
	}
	return axis;
	};
	Axis.prototype.getId = function getId(id) {
	var config = this.owner.config;
	return id in config.data_axes ? config.data_axes[id] : 'y';
	};
	Axis.prototype.getXAxisTickFormat = function getXAxisTickFormat() {
	var $$ = this.owner, config = $$.config,
	format = $$.isTimeSeries() ? $$.defaultAxisTimeFormat : $$.isCategorized() ? $$.categoryName : function (v) { return v < 0 ? v.toFixed(0) : v; };
	if (config.axis_x_tick_format) {
	if (isFunction(config.axis_x_tick_format)) {
	format = config.axis_x_tick_format;
	} else if ($$.isTimeSeries()) {
	format = function (date) {
	return date ? $$.axisTimeFormat(config.axis_x_tick_format)(date) : "";
	};
	}
	}
	return isFunction(format) ? function (v) { return format.call($$, v); } : format;
	};
	Axis.prototype.getTickValues = function getTickValues(tickValues, axis) {
	return tickValues ? tickValues : axis ? axis.tickValues() : undefined;
	};
	Axis.prototype.getXAxisTickValues = function getXAxisTickValues() {
	return this.getTickValues(this.owner.config.axis_x_tick_values, this.owner.xAxis);
	};
	Axis.prototype.getYAxisTickValues = function getYAxisTickValues() {
	return this.getTickValues(this.owner.config.axis_y_tick_values, this.owner.yAxis);
	};
	Axis.prototype.getY2AxisTickValues = function getY2AxisTickValues() {
	return this.getTickValues(this.owner.config.axis_y2_tick_values, this.owner.y2Axis);
	};
	Axis.prototype.getLabelOptionByAxisId = function getLabelOptionByAxisId(axisId) {
	var $$ = this.owner, config = $$.config, option;
	if (axisId === 'y') {
	option = config.axis_y_label;
	} else if (axisId === 'y2') {
	option = config.axis_y2_label;
	} else if (axisId === 'x') {
	option = config.axis_x_label;
	}
	return option;
	};
	Axis.prototype.getLabelText = function getLabelText(axisId) {
	var option = this.getLabelOptionByAxisId(axisId);
	return isString(option) ? option : option ? option.text : null;
	};
	Axis.prototype.setLabelText = function setLabelText(axisId, text) {
	var $$ = this.owner, config = $$.config,
	option = this.getLabelOptionByAxisId(axisId);
	if (isString(option)) {
	if (axisId === 'y') {
	config.axis_y_label = text;
	} else if (axisId === 'y2') {
	config.axis_y2_label = text;
	} else if (axisId === 'x') {
	config.axis_x_label = text;
	}
	} else if (option) {
	option.text = text;
	}
	};
	Axis.prototype.getLabelPosition = function getLabelPosition(axisId, defaultPosition) {
	var option = this.getLabelOptionByAxisId(axisId),
	position = (option && typeof option === 'object' && option.position) ? option.position : defaultPosition;
	return {
	isInner: position.indexOf('inner') >= 0,
	isOuter: position.indexOf('outer') >= 0,
	isLeft: position.indexOf('left') >= 0,
	isCenter: position.indexOf('center') >= 0,
	isRight: position.indexOf('right') >= 0,
	isTop: position.indexOf('top') >= 0,
	isMiddle: position.indexOf('middle') >= 0,
	isBottom: position.indexOf('bottom') >= 0
	};
	};
	Axis.prototype.getXAxisLabelPosition = function getXAxisLabelPosition() {
	return this.getLabelPosition('x', this.owner.config.axis_rotated ? 'inner-top' : 'inner-right');
	};
	Axis.prototype.getYAxisLabelPosition = function getYAxisLabelPosition() {
	return this.getLabelPosition('y', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
	};
	Axis.prototype.getY2AxisLabelPosition = function getY2AxisLabelPosition() {
	return this.getLabelPosition('y2', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
	};
	Axis.prototype.getLabelPositionById = function getLabelPositionById(id) {
	return id === 'y2' ? this.getY2AxisLabelPosition() : id === 'y' ? this.getYAxisLabelPosition() : this.getXAxisLabelPosition();
	};
	Axis.prototype.textForXAxisLabel = function textForXAxisLabel() {
	return this.getLabelText('x');
	};
	Axis.prototype.textForYAxisLabel = function textForYAxisLabel() {
	return this.getLabelText('y');
	};
	Axis.prototype.textForY2AxisLabel = function textForY2AxisLabel() {
	return this.getLabelText('y2');
	};
	Axis.prototype.xForAxisLabel = function xForAxisLabel(forHorizontal, position) {
	var $$ = this.owner;
	if (forHorizontal) {
	return position.isLeft ? 0 : position.isCenter ? $$.width / 2 : $$.width;
	} else {
	return position.isBottom ? -$$.height : position.isMiddle ? -$$.height / 2 : 0;
	}
	};
	Axis.prototype.dxForAxisLabel = function dxForAxisLabel(forHorizontal, position) {
	if (forHorizontal) {
	return position.isLeft ? "0.5em" : position.isRight ? "-0.5em" : "0";
	} else {
	return position.isTop ? "-0.5em" : position.isBottom ? "0.5em" : "0";
	}
	};
	Axis.prototype.textAnchorForAxisLabel = function textAnchorForAxisLabel(forHorizontal, position) {
	if (forHorizontal) {
	return position.isLeft ? 'start' : position.isCenter ? 'middle' : 'end';
	} else {
	return position.isBottom ? 'start' : position.isMiddle ? 'middle' : 'end';
	}
	};
	Axis.prototype.xForXAxisLabel = function xForXAxisLabel() {
	return this.xForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
	};
	Axis.prototype.xForYAxisLabel = function xForYAxisLabel() {
	return this.xForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
	};
	Axis.prototype.xForY2AxisLabel = function xForY2AxisLabel() {
	return this.xForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
	};
	Axis.prototype.dxForXAxisLabel = function dxForXAxisLabel() {
	return this.dxForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
	};
	Axis.prototype.dxForYAxisLabel = function dxForYAxisLabel() {
	return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
	};
	Axis.prototype.dxForY2AxisLabel = function dxForY2AxisLabel() {
	return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
	};
	Axis.prototype.dyForXAxisLabel = function dyForXAxisLabel() {
	var $$ = this.owner, config = $$.config,
	position = this.getXAxisLabelPosition();
	if (config.axis_rotated) {
	return position.isInner ? "1.2em" : -25 - this.getMaxTickWidth('x');
	} else {
	return position.isInner ? "-0.5em" : config.axis_x_height ? config.axis_x_height - 10 : "3em";
	}
	};
	Axis.prototype.dyForYAxisLabel = function dyForYAxisLabel() {
	var $$ = this.owner,
	position = this.getYAxisLabelPosition();
	if ($$.config.axis_rotated) {
	return position.isInner ? "-0.5em" : "3em";
	} else {
	return position.isInner ? "1.2em" : -10 - ($$.config.axis_y_inner ? 0 : (this.getMaxTickWidth('y') + 10));
	}
	};
	Axis.prototype.dyForY2AxisLabel = function dyForY2AxisLabel() {
	var $$ = this.owner,
	position = this.getY2AxisLabelPosition();
	if ($$.config.axis_rotated) {
	return position.isInner ? "1.2em" : "-2.2em";
	} else {
	return position.isInner ? "-0.5em" : 15 + ($$.config.axis_y2_inner ? 0 : (this.getMaxTickWidth('y2') + 15));
	}
	};
	Axis.prototype.textAnchorForXAxisLabel = function textAnchorForXAxisLabel() {
	var $$ = this.owner;
	return this.textAnchorForAxisLabel(!$$.config.axis_rotated, this.getXAxisLabelPosition());
	};
	Axis.prototype.textAnchorForYAxisLabel = function textAnchorForYAxisLabel() {
	var $$ = this.owner;
	return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getYAxisLabelPosition());
	};
	Axis.prototype.textAnchorForY2AxisLabel = function textAnchorForY2AxisLabel() {
	var $$ = this.owner;
	return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getY2AxisLabelPosition());
	};
	Axis.prototype.getMaxTickWidth = function getMaxTickWidth(id, withoutRecompute) {
	var $$ = this.owner, config = $$.config,
	maxWidth = 0, targetsToShow, scale, axis, dummy, svg;
	if (withoutRecompute && $$.currentMaxTickWidths[id]) {
	return $$.currentMaxTickWidths[id];
	}
	if ($$.svg) {
	targetsToShow = $$.filterTargetsToShow($$.data.targets);
	if (id === 'y') {
	scale = $$.y.copy().domain($$.getYDomain(targetsToShow, 'y'));
	axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true);
	} else if (id === 'y2') {
	scale = $$.y2.copy().domain($$.getYDomain(targetsToShow, 'y2'));
	axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true);
	} else {
	scale = $$.x.copy().domain($$.getXDomain(targetsToShow));
	axis = this.getXAxis(scale, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, false, true, true);
	this.updateXAxisTickValues(targetsToShow, axis);
	}
	dummy = $$.d3.select('body').append('div').classed('c3', true);
	svg = dummy.append("svg").style('visibility', 'hidden').style('position', 'fixed').style('top', 0).style('left', 0),
	svg.append('g').call(axis).each(function () {
	$$.d3.select(this).selectAll('text').each(function () {
	var box = this.getBoundingClientRect();
	if (maxWidth < box.width) { maxWidth = box.width; }
	});
	dummy.remove();
	});
	}
	$$.currentMaxTickWidths[id] = maxWidth <= 0 ? $$.currentMaxTickWidths[id] : maxWidth;
	return $$.currentMaxTickWidths[id];
	};

	Axis.prototype.updateLabels = function updateLabels(withTransition) {
	var $$ = this.owner;
	var axisXLabel = $$.main.select('.' + CLASS.axisX + ' .' + CLASS.axisXLabel),
	axisYLabel = $$.main.select('.' + CLASS.axisY + ' .' + CLASS.axisYLabel),
	axisY2Label = $$.main.select('.' + CLASS.axisY2 + ' .' + CLASS.axisY2Label);
	(withTransition ? axisXLabel.transition() : axisXLabel)
	.attr("x", this.xForXAxisLabel.bind(this))
	.attr("dx", this.dxForXAxisLabel.bind(this))
	.attr("dy", this.dyForXAxisLabel.bind(this))
	.text(this.textForXAxisLabel.bind(this));
	(withTransition ? axisYLabel.transition() : axisYLabel)
	.attr("x", this.xForYAxisLabel.bind(this))
	.attr("dx", this.dxForYAxisLabel.bind(this))
	.attr("dy", this.dyForYAxisLabel.bind(this))
	.text(this.textForYAxisLabel.bind(this));
	(withTransition ? axisY2Label.transition() : axisY2Label)
	.attr("x", this.xForY2AxisLabel.bind(this))
	.attr("dx", this.dxForY2AxisLabel.bind(this))
	.attr("dy", this.dyForY2AxisLabel.bind(this))
	.text(this.textForY2AxisLabel.bind(this));
	};
	Axis.prototype.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
	if (!isValue(padding[key])) {
	return defaultValue;
	}
	if (padding.unit === 'ratio') {
	return padding[key] * domainLength;
	}
	// assume padding is pixels if unit is not specified
	return this.convertPixelsToAxisPadding(padding[key], domainLength);
	};
	Axis.prototype.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
	var $$ = this.owner,
	length = $$.config.axis_rotated ? $$.width : $$.height;
	return domainLength * (pixels / length);
	};
	Axis.prototype.generateTickValues = function generateTickValues(values, tickCount, forTimeSeries) {
	var tickValues = values, targetCount, start, end, count, interval, i, tickValue;
	if (tickCount) {
	targetCount = isFunction(tickCount) ? tickCount() : tickCount;
	// compute ticks according to tickCount
	if (targetCount === 1) {
	tickValues = [values[0]];
	} else if (targetCount === 2) {
	tickValues = [values[0], values[values.length - 1]];
	} else if (targetCount > 2) {
	count = targetCount - 2;
	start = values[0];
	end = values[values.length - 1];
	interval = (end - start) / (count + 1);
	// re-construct unique values
	tickValues = [start];
	for (i = 0; i < count; i++) {
	tickValue = +start + interval * (i + 1);
	tickValues.push(forTimeSeries ? new Date(tickValue) : tickValue);
	}
	tickValues.push(end);
	}
	}
	if (!forTimeSeries) { tickValues = tickValues.sort(function (a, b) { return a - b; }); }
	return tickValues;
	};
	Axis.prototype.generateTransitions = function generateTransitions(duration) {
	var $$ = this.owner, axes = $$.axes;
	return {
	axisX: duration ? axes.x.transition().duration(duration) : axes.x,
	axisY: duration ? axes.y.transition().duration(duration) : axes.y,
	axisY2: duration ? axes.y2.transition().duration(duration) : axes.y2,
	axisSubX: duration ? axes.subx.transition().duration(duration) : axes.subx
	};
	};
	Axis.prototype.redraw = function redraw(transitions, isHidden) {
	var $$ = this.owner;
	$$.axes.x.style("opacity", isHidden ? 0 : 1);
	$$.axes.y.style("opacity", isHidden ? 0 : 1);
	$$.axes.y2.style("opacity", isHidden ? 0 : 1);
	$$.axes.subx.style("opacity", isHidden ? 0 : 1);
	transitions.axisX.call($$.xAxis);
	transitions.axisY.call($$.yAxis);
	transitions.axisY2.call($$.y2Axis);
	transitions.axisSubX.call($$.subXAxis);
	};

	c3_chart_internal_fn.getClipPath = function (id) {
	var isIE9 = window.navigator.appVersion.toLowerCase().indexOf("msie 9.") >= 0;
	return "url(" + (isIE9 ? "" : document.URL.split('#')[0]) + "#" + id + ")";
	};
	c3_chart_internal_fn.appendClip = function (parent, id) {
	return parent.append("clipPath").attr("id", id).append("rect");
	};
	c3_chart_internal_fn.getAxisClipX = function (forHorizontal) {
	// axis line width + padding for left
	var left = Math.max(30, this.margin.left);
	return forHorizontal ? -(1 + left) : -(left - 1);
	};
	c3_chart_internal_fn.getAxisClipY = function (forHorizontal) {
	return forHorizontal ? -20 : -this.margin.top;
	};
	c3_chart_internal_fn.getXAxisClipX = function () {
	var $$ = this;
	return $$.getAxisClipX(!$$.config.axis_rotated);
	};
	c3_chart_internal_fn.getXAxisClipY = function () {
	var $$ = this;
	return $$.getAxisClipY(!$$.config.axis_rotated);
	};
	c3_chart_internal_fn.getYAxisClipX = function () {
	var $$ = this;
	return $$.config.axis_y_inner ? -1 : $$.getAxisClipX($$.config.axis_rotated);
	};
	c3_chart_internal_fn.getYAxisClipY = function () {
	var $$ = this;
	return $$.getAxisClipY($$.config.axis_rotated);
	};
	c3_chart_internal_fn.getAxisClipWidth = function (forHorizontal) {
	var $$ = this,
	left = Math.max(30, $$.margin.left),
	right = Math.max(30, $$.margin.right);
	// width + axis line width + padding for left/right
	return forHorizontal ? $$.width + 2 + left + right : $$.margin.left + 20;
	};
	c3_chart_internal_fn.getAxisClipHeight = function (forHorizontal) {
	// less than 20 is not enough to show the axis label 'outer' without legend
	return (forHorizontal ? this.margin.bottom : (this.margin.top + this.height)) + 20;
	};
	c3_chart_internal_fn.getXAxisClipWidth = function () {
	var $$ = this;
	return $$.getAxisClipWidth(!$$.config.axis_rotated);
	};
	c3_chart_internal_fn.getXAxisClipHeight = function () {
	var $$ = this;
	return $$.getAxisClipHeight(!$$.config.axis_rotated);
	};
	c3_chart_internal_fn.getYAxisClipWidth = function () {
	var $$ = this;
	return $$.getAxisClipWidth($$.config.axis_rotated) + ($$.config.axis_y_inner ? 20 : 0);
	};
	c3_chart_internal_fn.getYAxisClipHeight = function () {
	var $$ = this;
	return $$.getAxisClipHeight($$.config.axis_rotated);
	};

	c3_chart_internal_fn.initPie = function () {
	var $$ = this, d3 = $$.d3, config = $$.config;
	$$.pie = d3.layout.pie().value(function (d) {
	return d.values.reduce(function (a, b) { return a + b.value; }, 0);
	});
	if (!config.data_order) {
	$$.pie.sort(null);
	}
	};

	c3_chart_internal_fn.updateRadius = function () {
	var $$ = this, config = $$.config,
	w = config.gauge_width \|\| config.donut_width;
	$$.radiusExpanded = Math.min($$.arcWidth, $$.arcHeight) / 2;
	$$.radius = $$.radiusExpanded * 0.95;
	$$.innerRadiusRatio = w ? ($$.radius - w) / $$.radius : 0.6;
	$$.innerRadius = $$.hasType('donut') \|\| $$.hasType('gauge') ? $$.radius * $$.innerRadiusRatio : 0;
	};

	c3_chart_internal_fn.updateArc = function () {
	var $$ = this;
	$$.svgArc = $$.getSvgArc();
	$$.svgArcExpanded = $$.getSvgArcExpanded();
	$$.svgArcExpandedSub = $$.getSvgArcExpanded(0.98);
	};

	c3_chart_internal_fn.updateAngle = function (d) {
	var $$ = this, config = $$.config,
	found = false, index = 0,
	gMin = config.gauge_min, gMax = config.gauge_max, gTic, gValue;
	$$.pie($$.filterTargetsToShow($$.data.targets)).forEach(function (t) {
	if (! found && t.data.id === d.data.id) {
	found = true;
	d = t;
	d.index = index;
	}
	index++;
	});
	if (isNaN(d.startAngle)) {
	d.startAngle = 0;
	}
	if (isNaN(d.endAngle)) {
	d.endAngle = d.startAngle;
	}
	if ($$.isGaugeType(d.data)) {
	gTic = (Math.PI) / (gMax - gMin);
	gValue = d.value < gMin ? 0 : d.value < gMax ? d.value - gMin : (gMax - gMin);
	d.startAngle = -1 * (Math.PI / 2);
	d.endAngle = d.startAngle + gTic * gValue;
	}
	return found ? d : null;
	};

	c3_chart_internal_fn.getSvgArc = function () {
	var $$ = this,
	arc = $$.d3.svg.arc().outerRadius($$.radius).innerRadius($$.innerRadius),
	newArc = function (d, withoutUpdate) {
	var updated;
	if (withoutUpdate) { return arc(d); } // for interpolate
	updated = $$.updateAngle(d);
	return updated ? arc(updated) : "M 0 0";
	};
	// TODO: extends all function
	newArc.centroid = arc.centroid;
	return newArc;
	};

	c3_chart_internal_fn.getSvgArcExpanded = function (rate) {
	var $$ = this,
	arc = $$.d3.svg.arc().outerRadius($$.radiusExpanded * (rate ? rate : 1)).innerRadius($$.innerRadius);
	return function (d) {
	var updated = $$.updateAngle(d);
	return updated ? arc(updated) : "M 0 0";
	};
	};

	c3_chart_internal_fn.getArc = function (d, withoutUpdate, force) {
	return force \|\| this.isArcType(d.data) ? this.svgArc(d, withoutUpdate) : "M 0 0";
	};


	c3_chart_internal_fn.transformForArcLabel = function (d) {
	var $$ = this,
	updated = $$.updateAngle(d), c, x, y, h, ratio, translate = "";
	if (updated && !$$.hasType('gauge')) {
	c = this.svgArc.centroid(updated);
	x = isNaN(c[0]) ? 0 : c[0];
	y = isNaN(c[1]) ? 0 : c[1];
	h = Math.sqrt(x * x + y * y);
	// TODO: ratio should be an option?
	ratio = $$.radius && h ? (36 / $$.radius > 0.375 ? 1.175 - 36 / $$.radius : 0.8) * $$.radius / h : 0;
	translate = "translate(" + (x * ratio) + ',' + (y * ratio) + ")";
	}
	return translate;
	};

	c3_chart_internal_fn.getArcRatio = function (d) {
	var $$ = this,
	whole = $$.hasType('gauge') ? Math.PI : (Math.PI * 2);
	return d ? (d.endAngle - d.startAngle) / whole : null;
	};

	c3_chart_internal_fn.convertToArcData = function (d) {
	return this.addName({
	id: d.data.id,
	value: d.value,
	ratio: this.getArcRatio(d),
	index: d.index
	});
	};

	c3_chart_internal_fn.textForArcLabel = function (d) {
	var $$ = this,
	updated, value, ratio, id, format;
	if (! $$.shouldShowArcLabel()) { return ""; }
	updated = $$.updateAngle(d);
	value = updated ? updated.value : null;
	ratio = $$.getArcRatio(updated);
	id = d.data.id;
	if (! $$.hasType('gauge') && ! $$.meetsArcLabelThreshold(ratio)) { return ""; }
	format = $$.getArcLabelFormat();
	return format ? format(value, ratio, id) : $$.defaultArcValueFormat(value, ratio);
	};

	c3_chart_internal_fn.expandArc = function (targetIds) {
	var $$ = this, interval;

	// MEMO: avoid to cancel transition
	if ($$.transiting) {
	interval = window.setInterval(function () {
	if (!$$.transiting) {
	window.clearInterval(interval);
	if ($$.legend.selectAll('.c3-legend-item-focused').size() > 0) {
	$$.expandArc(targetIds);
	}
	}
	}, 10);
	return;
	}

	targetIds = $$.mapToTargetIds(targetIds);

	$$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).each(function (d) {
	if (! $$.shouldExpand(d.data.id)) { return; }
	$$.d3.select(this).selectAll('path')
	.transition().duration(50)
	.attr("d", $$.svgArcExpanded)
	.transition().duration(100)
	.attr("d", $$.svgArcExpandedSub)
	.each(function (d) {
	if ($$.isDonutType(d.data)) {
	// callback here
	}
	});
	});
	};

	c3_chart_internal_fn.unexpandArc = function (targetIds) {
	var $$ = this;

	if ($$.transiting) { return; }

	targetIds = $$.mapToTargetIds(targetIds);

	$$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).selectAll('path')
	.transition().duration(50)
	.attr("d", $$.svgArc);
	$$.svg.selectAll('.' + CLASS.arc)
	.style("opacity", 1);
	};

	c3_chart_internal_fn.shouldExpand = function (id) {
	var $$ = this, config = $$.config;
	return ($$.isDonutType(id) && config.donut_expand) \|\| ($$.isGaugeType(id) && config.gauge_expand) \|\| ($$.isPieType(id) && config.pie_expand);
	};

	c3_chart_internal_fn.shouldShowArcLabel = function () {
	var $$ = this, config = $$.config, shouldShow = true;
	if ($$.hasType('donut')) {
	shouldShow = config.donut_label_show;
	} else if ($$.hasType('pie')) {
	shouldShow = config.pie_label_show;
	}
	// when gauge, always true
	return shouldShow;
	};

	c3_chart_internal_fn.meetsArcLabelThreshold = function (ratio) {
	var $$ = this, config = $$.config,
	threshold = $$.hasType('donut') ? config.donut_label_threshold : config.pie_label_threshold;
	return ratio >= threshold;
	};

	c3_chart_internal_fn.getArcLabelFormat = function () {
	var $$ = this, config = $$.config,
	format = config.pie_label_format;
	if ($$.hasType('gauge')) {
	format = config.gauge_label_format;
	} else if ($$.hasType('donut')) {
	format = config.donut_label_format;
	}
	return format;
	};

	c3_chart_internal_fn.getArcTitle = function () {
	var $$ = this;
	return $$.hasType('donut') ? $$.config.donut_title : "";
	};

	c3_chart_internal_fn.updateTargetsForArc = function (targets) {
	var $$ = this, main = $$.main,
	mainPieUpdate, mainPieEnter,
	classChartArc = $$.classChartArc.bind($$),
	classArcs = $$.classArcs.bind($$),
	classFocus = $$.classFocus.bind($$);
	mainPieUpdate = main.select('.' + CLASS.chartArcs).selectAll('.' + CLASS.chartArc)
	.data($$.pie(targets))
	.attr("class", function (d) { return classChartArc(d) + classFocus(d.data); });
	mainPieEnter = mainPieUpdate.enter().append("g")
	.attr("class", classChartArc);
	mainPieEnter.append('g')
	.attr('class', classArcs);
	mainPieEnter.append("text")
	.attr("dy", $$.hasType('gauge') ? "-.1em" : ".35em")
	.style("opacity", 0)
	.style("text-anchor", "middle")
	.style("pointer-events", "none");
	// MEMO: can not keep same color..., but not bad to update color in redraw
	//mainPieUpdate.exit().remove();
	};

	c3_chart_internal_fn.initArc = function () {
	var $$ = this;
	$$.arcs = $$.main.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartArcs)
	.attr("transform", $$.getTranslate('arc'));
	$$.arcs.append('text')
	.attr('class', CLASS.chartArcsTitle)
	.style("text-anchor", "middle")
	.text($$.getArcTitle());
	};

	c3_chart_internal_fn.redrawArc = function (duration, durationForExit, withTransform) {
	var $$ = this, d3 = $$.d3, config = $$.config, main = $$.main,
	mainArc;
	mainArc = main.selectAll('.' + CLASS.arcs).selectAll('.' + CLASS.arc)
	.data($$.arcData.bind($$));
	mainArc.enter().append('path')
	.attr("class", $$.classArc.bind($$))
	.style("fill", function (d) { return $$.color(d.data); })
	.style("cursor", function (d) { return config.interaction_enabled && config.data_selection_isselectable(d) ? "pointer" : null; })
	.style("opacity", 0)
	.each(function (d) {
	if ($$.isGaugeType(d.data)) {
	d.startAngle = d.endAngle = -1 * (Math.PI / 2);
	}
	this._current = d;
	});
	mainArc
	.attr("transform", function (d) { return !$$.isGaugeType(d.data) && withTransform ? "scale(0)" : ""; })
	.style("opacity", function (d) { return d === this._current ? 0 : 1; })
	.on('mouseover', config.interaction_enabled ? function (d) {
	var updated, arcData;
	if ($$.transiting) { // skip while transiting
	return;
	}
	updated = $$.updateAngle(d);
	arcData = $$.convertToArcData(updated);
	// transitions
	$$.expandArc(updated.data.id);
	$$.api.focus(updated.data.id);
	$$.toggleFocusLegend(updated.data.id, true);
	$$.config.data_onmouseover(arcData, this);
	} : null)
	.on('mousemove', config.interaction_enabled ? function (d) {
	var updated = $$.updateAngle(d),
	arcData = $$.convertToArcData(updated),
	selectedData = [arcData];
	$$.showTooltip(selectedData, this);
	} : null)
	.on('mouseout', config.interaction_enabled ? function (d) {
	var updated, arcData;
	if ($$.transiting) { // skip while transiting
	return;
	}
	updated = $$.updateAngle(d);
	arcData = $$.convertToArcData(updated);
	// transitions
	$$.unexpandArc(updated.data.id);
	$$.api.revert();
	$$.revertLegend();
	$$.hideTooltip();
	$$.config.data_onmouseout(arcData, this);
	} : null)
	.on('click', config.interaction_enabled ? function (d, i) {
	var updated = $$.updateAngle(d),
	arcData = $$.convertToArcData(updated);
	if ($$.toggleShape) { $$.toggleShape(this, arcData, i); }
	$$.config.data_onclick.call($$.api, arcData, this);
	} : null)
	.each(function () { $$.transiting = true; })
	.transition().duration(duration)
	.attrTween("d", function (d) {
	var updated = $$.updateAngle(d), interpolate;
	if (! updated) {
	return function () { return "M 0 0"; };
	}
	// if (this._current === d) {
	// this._current = {
	// startAngle: Math.PI*2,
	// endAngle: Math.PI*2,
	// };
	// }
	if (isNaN(this._current.startAngle)) {
	this._current.startAngle = 0;
	}
	if (isNaN(this._current.endAngle)) {
	this._current.endAngle = this._current.startAngle;
	}
	interpolate = d3.interpolate(this._current, updated);
	this._current = interpolate(0);
	return function (t) {
	var interpolated = interpolate(t);
	interpolated.data = d.data; // data.id will be updated by interporator
	return $$.getArc(interpolated, true);
	};
	})
	.attr("transform", withTransform ? "scale(1)" : "")
	.style("fill", function (d) {
	return $$.levelColor ? $$.levelColor(d.data.values[0].value) : $$.color(d.data.id);
	}) // Where gauge reading color would receive customization.
	.style("opacity", 1)
	.call($$.endall, function () {
	$$.transiting = false;
	});
	mainArc.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	main.selectAll('.' + CLASS.chartArc).select('text')
	.style("opacity", 0)
	.attr('class', function (d) { return $$.isGaugeType(d.data) ? CLASS.gaugeValue : ''; })
	.text($$.textForArcLabel.bind($$))
	.attr("transform", $$.transformForArcLabel.bind($$))
	.style('font-size', function (d) { return $$.isGaugeType(d.data) ? Math.round($$.radius / 5) + 'px' : ''; })
	.transition().duration(duration)
	.style("opacity", function (d) { return $$.isTargetToShow(d.data.id) && $$.isArcType(d.data) ? 1 : 0; });
	main.select('.' + CLASS.chartArcsTitle)
	.style("opacity", $$.hasType('donut') \|\| $$.hasType('gauge') ? 1 : 0);

	if ($$.hasType('gauge')) {
	$$.arcs.select('.' + CLASS.chartArcsBackground)
	.attr("d", function () {
	var d = {
	data: [{value: config.gauge_max}],
	startAngle: -1 * (Math.PI / 2),
	endAngle: Math.PI / 2
	};
	return $$.getArc(d, true, true);
	});
	$$.arcs.select('.' + CLASS.chartArcsGaugeUnit)
	.attr("dy", ".75em")
	.text(config.gauge_label_show ? config.gauge_units : '');
	$$.arcs.select('.' + CLASS.chartArcsGaugeMin)
	.attr("dx", -1 * ($$.innerRadius + (($$.radius - $$.innerRadius) / 2)) + "px")
	.attr("dy", "1.2em")
	.text(config.gauge_label_show ? config.gauge_min : '');
	$$.arcs.select('.' + CLASS.chartArcsGaugeMax)
	.attr("dx", $$.innerRadius + (($$.radius - $$.innerRadius) / 2) + "px")
	.attr("dy", "1.2em")
	.text(config.gauge_label_show ? config.gauge_max : '');
	}
	};
	c3_chart_internal_fn.initGauge = function () {
	var arcs = this.arcs;
	if (this.hasType('gauge')) {
	arcs.append('path')
	.attr("class", CLASS.chartArcsBackground);
	arcs.append("text")
	.attr("class", CLASS.chartArcsGaugeUnit)
	.style("text-anchor", "middle")
	.style("pointer-events", "none");
	arcs.append("text")
	.attr("class", CLASS.chartArcsGaugeMin)
	.style("text-anchor", "middle")
	.style("pointer-events", "none");
	arcs.append("text")
	.attr("class", CLASS.chartArcsGaugeMax)
	.style("text-anchor", "middle")
	.style("pointer-events", "none");
	}
	};
	c3_chart_internal_fn.getGaugeLabelHeight = function () {
	return this.config.gauge_label_show ? 20 : 0;
	};

	c3_chart_internal_fn.initRegion = function () {
	var $$ = this;
	$$.region = $$.main.append('g')
	.attr("clip-path", $$.clipPath)
	.attr("class", CLASS.regions);
	};
	c3_chart_internal_fn.updateRegion = function (duration) {
	var $$ = this, config = $$.config;

	// hide if arc type
	$$.region.style('visibility', $$.hasArcType() ? 'hidden' : 'visible');

	$$.mainRegion = $$.main.select('.' + CLASS.regions).selectAll('.' + CLASS.region)
	.data(config.regions);
	$$.mainRegion.enter().append('g')
	.attr('class', $$.classRegion.bind($$))
	.append('rect')
	.style("fill-opacity", 0);
	$$.mainRegion.exit().transition().duration(duration)
	.style("opacity", 0)
	.remove();
	};
	c3_chart_internal_fn.redrawRegion = function (withTransition) {
	var $$ = this,
	regions = $$.mainRegion.selectAll('rect'),
	x = $$.regionX.bind($$),
	y = $$.regionY.bind($$),
	w = $$.regionWidth.bind($$),
	h = $$.regionHeight.bind($$);
	return [
	(withTransition ? regions.transition() : regions)
	.attr("x", x)
	.attr("y", y)
	.attr("width", w)
	.attr("height", h)
	.style("fill-opacity", function (d) { return isValue(d.opacity) ? d.opacity : 0.1; })
	];
	};
	c3_chart_internal_fn.regionX = function (d) {
	var $$ = this, config = $$.config,
	xPos, yScale = d.axis === 'y' ? $$.y : $$.y2;
	if (d.axis === 'y' \|\| d.axis === 'y2') {
	xPos = config.axis_rotated ? ('start' in d ? yScale(d.start) : 0) : 0;
	} else {
	xPos = config.axis_rotated ? 0 : ('start' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.start) : d.start) : 0);
	}
	return xPos;
	};
	c3_chart_internal_fn.regionY = function (d) {
	var $$ = this, config = $$.config,
	yPos, yScale = d.axis === 'y' ? $$.y : $$.y2;
	if (d.axis === 'y' \|\| d.axis === 'y2') {
	yPos = config.axis_rotated ? 0 : ('end' in d ? yScale(d.end) : 0);
	} else {
	yPos = config.axis_rotated ? ('start' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.start) : d.start) : 0) : 0;
	}
	return yPos;
	};
	c3_chart_internal_fn.regionWidth = function (d) {
	var $$ = this, config = $$.config,
	start = $$.regionX(d), end, yScale = d.axis === 'y' ? $$.y : $$.y2;
	if (d.axis === 'y' \|\| d.axis === 'y2') {
	end = config.axis_rotated ? ('end' in d ? yScale(d.end) : $$.width) : $$.width;
	} else {
	end = config.axis_rotated ? $$.width : ('end' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.end) : d.end) : $$.width);
	}
	return end < start ? 0 : end - start;
	};
	c3_chart_internal_fn.regionHeight = function (d) {
	var $$ = this, config = $$.config,
	start = this.regionY(d), end, yScale = d.axis === 'y' ? $$.y : $$.y2;
	if (d.axis === 'y' \|\| d.axis === 'y2') {
	end = config.axis_rotated ? $$.height : ('start' in d ? yScale(d.start) : $$.height);
	} else {
	end = config.axis_rotated ? ('end' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.end) : d.end) : $$.height) : $$.height;
	}
	return end < start ? 0 : end - start;
	};
	c3_chart_internal_fn.isRegionOnX = function (d) {
	return !d.axis \|\| d.axis === 'x';
	};

	c3_chart_internal_fn.drag = function (mouse) {
	var $$ = this, config = $$.config, main = $$.main, d3 = $$.d3;
	var sx, sy, mx, my, minX, maxX, minY, maxY;

	if ($$.hasArcType()) { return; }
	if (! config.data_selection_enabled) { return; } // do nothing if not selectable
	if (config.zoom_enabled && ! $$.zoom.altDomain) { return; } // skip if zoomable because of conflict drag dehavior
	if (!config.data_selection_multiple) { return; } // skip when single selection because drag is used for multiple selection

	sx = $$.dragStart[0];
	sy = $$.dragStart[1];
	mx = mouse[0];
	my = mouse[1];
	minX = Math.min(sx, mx);
	maxX = Math.max(sx, mx);
	minY = (config.data_selection_grouped) ? $$.margin.top : Math.min(sy, my);
	maxY = (config.data_selection_grouped) ? $$.height : Math.max(sy, my);

	main.select('.' + CLASS.dragarea)
	.attr('x', minX)
	.attr('y', minY)
	.attr('width', maxX - minX)
	.attr('height', maxY - minY);
	// TODO: binary search when multiple xs
	main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape)
	.filter(function (d) { return config.data_selection_isselectable(d); })
	.each(function (d, i) {
	var shape = d3.select(this),
	isSelected = shape.classed(CLASS.SELECTED),
	isIncluded = shape.classed(CLASS.INCLUDED),
	_x, _y, _w, _h, toggle, isWithin = false, box;
	if (shape.classed(CLASS.circle)) {
	_x = shape.attr("cx") * 1;
	_y = shape.attr("cy") * 1;
	toggle = $$.togglePoint;
	isWithin = minX < _x && _x < maxX && minY < _y && _y < maxY;
	}
	else if (shape.classed(CLASS.bar)) {
	box = getPathBox(this);
	_x = box.x;
	_y = box.y;
	_w = box.width;
	_h = box.height;
	toggle = $$.togglePath;
	isWithin = !(maxX < _x \|\| _x + _w < minX) && !(maxY < _y \|\| _y + _h < minY);
	} else {
	// line/area selection not supported yet
	return;
	}
	if (isWithin ^ isIncluded) {
	shape.classed(CLASS.INCLUDED, !isIncluded);
	// TODO: included/unincluded callback here
	shape.classed(CLASS.SELECTED, !isSelected);
	toggle.call($$, !isSelected, shape, d, i);
	}
	});
	};

	c3_chart_internal_fn.dragstart = function (mouse) {
	var $$ = this, config = $$.config;
	if ($$.hasArcType()) { return; }
	if (! config.data_selection_enabled) { return; } // do nothing if not selectable
	$$.dragStart = mouse;
	$$.main.select('.' + CLASS.chart).append('rect')
	.attr('class', CLASS.dragarea)
	.style('opacity', 0.1);
	$$.dragging = true;
	};

	c3_chart_internal_fn.dragend = function () {
	var $$ = this, config = $$.config;
	if ($$.hasArcType()) { return; }
	if (! config.data_selection_enabled) { return; } // do nothing if not selectable
	$$.main.select('.' + CLASS.dragarea)
	.transition().duration(100)
	.style('opacity', 0)
	.remove();
	$$.main.selectAll('.' + CLASS.shape)
	.classed(CLASS.INCLUDED, false);
	$$.dragging = false;
	};

	c3_chart_internal_fn.selectPoint = function (target, d, i) {
	var $$ = this, config = $$.config,
	cx = (config.axis_rotated ? $$.circleY : $$.circleX).bind($$),
	cy = (config.axis_rotated ? $$.circleX : $$.circleY).bind($$),
	r = $$.pointSelectR.bind($$);
	config.data_onselected.call($$.api, d, target.node());
	// add selected-circle on low layer g
	$$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i)
	.data([d])
	.enter().append('circle')
	.attr("class", function () { return $$.generateClass(CLASS.selectedCircle, i); })
	.attr("cx", cx)
	.attr("cy", cy)
	.attr("stroke", function () { return $$.color(d); })
	.attr("r", function (d) { return $$.pointSelectR(d) * 1.4; })
	.transition().duration(100)
	.attr("r", r);
	};
	c3_chart_internal_fn.unselectPoint = function (target, d, i) {
	var $$ = this;
	$$.config.data_onunselected(d, target.node());
	// remove selected-circle from low layer g
	$$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i)
	.transition().duration(100).attr('r', 0)
	.remove();
	};
	c3_chart_internal_fn.togglePoint = function (selected, target, d, i) {
	selected ? this.selectPoint(target, d, i) : this.unselectPoint(target, d, i);
	};
	c3_chart_internal_fn.selectPath = function (target, d) {
	var $$ = this;
	$$.config.data_onselected.call($$, d, target.node());
	target.transition().duration(100)
	.style("fill", function () { return $$.d3.rgb($$.color(d)).brighter(0.75); });
	};
	c3_chart_internal_fn.unselectPath = function (target, d) {
	var $$ = this;
	$$.config.data_onunselected.call($$, d, target.node());
	target.transition().duration(100)
	.style("fill", function () { return $$.color(d); });
	};
	c3_chart_internal_fn.togglePath = function (selected, target, d, i) {
	selected ? this.selectPath(target, d, i) : this.unselectPath(target, d, i);
	};
	c3_chart_internal_fn.getToggle = function (that, d) {
	var $$ = this, toggle;
	if (that.nodeName === 'circle') {
	if ($$.isStepType(d)) {
	// circle is hidden in step chart, so treat as within the click area
	toggle = function () {}; // TODO: how to select step chart?
	} else {
	toggle = $$.togglePoint;
	}
	}
	else if (that.nodeName === 'path') {
	toggle = $$.togglePath;
	}
	return toggle;
	};
	c3_chart_internal_fn.toggleShape = function (that, d, i) {
	var $$ = this, d3 = $$.d3, config = $$.config,
	shape = d3.select(that), isSelected = shape.classed(CLASS.SELECTED),
	toggle = $$.getToggle(that, d).bind($$);

	if (config.data_selection_enabled && config.data_selection_isselectable(d)) {
	if (!config.data_selection_multiple) {
	$$.main.selectAll('.' + CLASS.shapes + (config.data_selection_grouped ? $$.getTargetSelectorSuffix(d.id) : "")).selectAll('.' + CLASS.shape).each(function (d, i) {
	var shape = d3.select(this);
	if (shape.classed(CLASS.SELECTED)) { toggle(false, shape.classed(CLASS.SELECTED, false), d, i); }
	});
	}
	shape.classed(CLASS.SELECTED, !isSelected);
	toggle(!isSelected, shape, d, i);
	}
	};

	c3_chart_internal_fn.initBrush = function () {
	var $$ = this, d3 = $$.d3;
	$$.brush = d3.svg.brush().on("brush", function () { $$.redrawForBrush(); });
	$$.brush.update = function () {
	if ($$.context) { $$.context.select('.' + CLASS.brush).call(this); }
	return this;
	};
	$$.brush.scale = function (scale) {
	return $$.config.axis_rotated ? this.y(scale) : this.x(scale);
	};
	};
	c3_chart_internal_fn.initSubchart = function () {
	var $$ = this, config = $$.config,
	context = $$.context = $$.svg.append("g").attr("transform", $$.getTranslate('context'));

	context.style('visibility', config.subchart_show ? 'visible' : 'hidden');

	// Define g for chart area
	context.append('g')
	.attr("clip-path", $$.clipPathForSubchart)
	.attr('class', CLASS.chart);

	// Define g for bar chart area
	context.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartBars);

	// Define g for line chart area
	context.select('.' + CLASS.chart).append("g")
	.attr("class", CLASS.chartLines);

	// Add extent rect for Brush
	context.append("g")
	.attr("clip-path", $$.clipPath)
	.attr("class", CLASS.brush)
	.call($$.brush);

	// ATTENTION: This must be called AFTER chart added
	// Add Axis
	$$.axes.subx = context.append("g")
	.attr("class", CLASS.axisX)
	.attr("transform", $$.getTranslate('subx'))
	.attr("clip-path", config.axis_rotated ? "" : $$.clipPathForXAxis);
	};
	c3_chart_internal_fn.updateTargetsForSubchart = function (targets) {
	var $$ = this, context = $$.context, config = $$.config,
	contextLineEnter, contextLineUpdate, contextBarEnter, contextBarUpdate,
	classChartBar = $$.classChartBar.bind($$),
	classBars = $$.classBars.bind($$),
	classChartLine = $$.classChartLine.bind($$),
	classLines = $$.classLines.bind($$),
	classAreas = $$.classAreas.bind($$);

	if (config.subchart_show) {
	//-- Bar --//
	contextBarUpdate = context.select('.' + CLASS.chartBars).selectAll('.' + CLASS.chartBar)
	.data(targets)
	.attr('class', classChartBar);
	contextBarEnter = contextBarUpdate.enter().append('g')
	.style('opacity', 0)
	.attr('class', classChartBar);
	// Bars for each data
	contextBarEnter.append('g')
	.attr("class", classBars);

	//-- Line --//
	contextLineUpdate = context.select('.' + CLASS.chartLines).selectAll('.' + CLASS.chartLine)
	.data(targets)
	.attr('class', classChartLine);
	contextLineEnter = contextLineUpdate.enter().append('g')
	.style('opacity', 0)
	.attr('class', classChartLine);
	// Lines for each data
	contextLineEnter.append("g")
	.attr("class", classLines);
	// Area
	contextLineEnter.append("g")
	.attr("class", classAreas);

	//-- Brush --//
	context.selectAll('.' + CLASS.brush + ' rect')
	.attr(config.axis_rotated ? "width" : "height", config.axis_rotated ? $$.width2 : $$.height2);
	}
	};
	c3_chart_internal_fn.updateBarForSubchart = function (durationForExit) {
	var $$ = this;
	$$.contextBar = $$.context.selectAll('.' + CLASS.bars).selectAll('.' + CLASS.bar)
	.data($$.barData.bind($$));
	$$.contextBar.enter().append('path')
	.attr("class", $$.classBar.bind($$))
	.style("stroke", 'none')
	.style("fill", $$.color);
	$$.contextBar
	.style("opacity", $$.initialOpacity.bind($$));
	$$.contextBar.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawBarForSubchart = function (drawBarOnSub, withTransition, duration) {
	(withTransition ? this.contextBar.transition().duration(duration) : this.contextBar)
	.attr('d', drawBarOnSub)
	.style('opacity', 1);
	};
	c3_chart_internal_fn.updateLineForSubchart = function (durationForExit) {
	var $$ = this;
	$$.contextLine = $$.context.selectAll('.' + CLASS.lines).selectAll('.' + CLASS.line)
	.data($$.lineData.bind($$));
	$$.contextLine.enter().append('path')
	.attr('class', $$.classLine.bind($$))
	.style('stroke', $$.color);
	$$.contextLine
	.style("opacity", $$.initialOpacity.bind($$));
	$$.contextLine.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawLineForSubchart = function (drawLineOnSub, withTransition, duration) {
	(withTransition ? this.contextLine.transition().duration(duration) : this.contextLine)
	.attr("d", drawLineOnSub)
	.style('opacity', 1);
	};
	c3_chart_internal_fn.updateAreaForSubchart = function (durationForExit) {
	var $$ = this, d3 = $$.d3;
	$$.contextArea = $$.context.selectAll('.' + CLASS.areas).selectAll('.' + CLASS.area)
	.data($$.lineData.bind($$));
	$$.contextArea.enter().append('path')
	.attr("class", $$.classArea.bind($$))
	.style("fill", $$.color)
	.style("opacity", function () { $$.orgAreaOpacity = +d3.select(this).style('opacity'); return 0; });
	$$.contextArea
	.style("opacity", 0);
	$$.contextArea.exit().transition().duration(durationForExit)
	.style('opacity', 0)
	.remove();
	};
	c3_chart_internal_fn.redrawAreaForSubchart = function (drawAreaOnSub, withTransition, duration) {
	(withTransition ? this.contextArea.transition().duration(duration) : this.contextArea)
	.attr("d", drawAreaOnSub)
	.style("fill", this.color)
	.style("opacity", this.orgAreaOpacity);
	};
	c3_chart_internal_fn.redrawSubchart = function (withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices) {
	var $$ = this, d3 = $$.d3, config = $$.config,
	drawAreaOnSub, drawBarOnSub, drawLineOnSub;

	$$.context.style('visibility', config.subchart_show ? 'visible' : 'hidden');

	// subchart
	if (config.subchart_show) {
	// reflect main chart to extent on subchart if zoomed
	if (d3.event && d3.event.type === 'zoom') {
	$$.brush.extent($$.x.orgDomain()).update();
	}
	// update subchart elements if needed
	if (withSubchart) {

	// extent rect
	if (!$$.brush.empty()) {
	$$.brush.extent($$.x.orgDomain()).update();
	}
	// setup drawer - MEMO: this must be called after axis updated
	drawAreaOnSub = $$.generateDrawArea(areaIndices, true);
	drawBarOnSub = $$.generateDrawBar(barIndices, true);
	drawLineOnSub = $$.generateDrawLine(lineIndices, true);

	$$.updateBarForSubchart(duration);
	$$.updateLineForSubchart(duration);
	$$.updateAreaForSubchart(duration);

	$$.redrawBarForSubchart(drawBarOnSub, duration, duration);
	$$.redrawLineForSubchart(drawLineOnSub, duration, duration);
	$$.redrawAreaForSubchart(drawAreaOnSub, duration, duration);
	}
	}
	};
	c3_chart_internal_fn.redrawForBrush = function () {
	var $$ = this, x = $$.x;
	$$.redraw({
	withTransition: false,
	withY: $$.config.zoom_rescale,
	withSubchart: false,
	withUpdateXDomain: true,
	withDimension: false
	});
	$$.config.subchart_onbrush.call($$.api, x.orgDomain());
	};
	c3_chart_internal_fn.transformContext = function (withTransition, transitions) {
	var $$ = this, subXAxis;
	if (transitions && transitions.axisSubX) {
	subXAxis = transitions.axisSubX;
	} else {
	subXAxis = $$.context.select('.' + CLASS.axisX);
	if (withTransition) { subXAxis = subXAxis.transition(); }
	}
	$$.context.attr("transform", $$.getTranslate('context'));
	subXAxis.attr("transform", $$.getTranslate('subx'));
	};
	c3_chart_internal_fn.getDefaultExtent = function () {
	var $$ = this, config = $$.config,
	extent = isFunction(config.axis_x_extent) ? config.axis_x_extent($$.getXDomain($$.data.targets)) : config.axis_x_extent;
	if ($$.isTimeSeries()) {
	extent = [$$.parseDate(extent[0]), $$.parseDate(extent[1])];
	}
	return extent;
	};

	c3_chart_internal_fn.initZoom = function () {
	var $$ = this, d3 = $$.d3, config = $$.config, startEvent;

	$$.zoom = d3.behavior.zoom()
	.on("zoomstart", function () {
	startEvent = d3.event.sourceEvent;
	$$.zoom.altDomain = d3.event.sourceEvent.altKey ? $$.x.orgDomain() : null;
	config.zoom_onzoomstart.call($$.api, d3.event.sourceEvent);
	})
	.on("zoom", function () {
	$$.redrawForZoom.call($$);
	})
	.on('zoomend', function () {
	var event = d3.event.sourceEvent;
	// if click, do nothing. otherwise, click interaction will be canceled.
	if (event && startEvent.clientX === event.clientX && startEvent.clientY === event.clientY) {
	return;
	}
	$$.redrawEventRect();
	$$.updateZoom();
	config.zoom_onzoomend.call($$.api, $$.x.orgDomain());
	});
	$$.zoom.scale = function (scale) {
	return config.axis_rotated ? this.y(scale) : this.x(scale);
	};
	$$.zoom.orgScaleExtent = function () {
	var extent = config.zoom_extent ? config.zoom_extent : [1, 10];
	return [extent[0], Math.max($$.getMaxDataCount() / extent[1], extent[1])];
	};
	$$.zoom.updateScaleExtent = function () {
	var ratio = diffDomain($$.x.orgDomain()) / diffDomain($$.orgXDomain),
	extent = this.orgScaleExtent();
	this.scaleExtent([extent[0] * ratio, extent[1] * ratio]);
	return this;
	};
	};
	c3_chart_internal_fn.updateZoom = function () {
	var $$ = this, z = $$.config.zoom_enabled ? $$.zoom : function () {};
	$$.main.select('.' + CLASS.zoomRect).call(z).on("dblclick.zoom", null);
	$$.main.selectAll('.' + CLASS.eventRect).call(z).on("dblclick.zoom", null);
	};
	c3_chart_internal_fn.redrawForZoom = function () {
	var $$ = this, d3 = $$.d3, config = $$.config, zoom = $$.zoom, x = $$.x;
	if (!config.zoom_enabled) {
	return;
	}
	if ($$.filterTargetsToShow($$.data.targets).length === 0) {
	return;
	}
	if (d3.event.sourceEvent.type === 'mousemove' && zoom.altDomain) {
	x.domain(zoom.altDomain);
	zoom.scale(x).updateScaleExtent();
	return;
	}
	if ($$.isCategorized() && x.orgDomain()[0] === $$.orgXDomain[0]) {
	x.domain([$$.orgXDomain[0] - 1e-10, x.orgDomain()[1]]);
	}
	$$.redraw({
	withTransition: false,
	withY: config.zoom_rescale,
	withSubchart: false,
	withEventRect: false,
	withDimension: false
	});
	if (d3.event.sourceEvent.type === 'mousemove') {
	$$.cancelClick = true;
	}
	config.zoom_onzoom.call($$.api, x.orgDomain());
	};

	c3_chart_internal_fn.generateColor = function () {
	var $$ = this, config = $$.config, d3 = $$.d3,
	colors = config.data_colors,
	pattern = notEmpty(config.color_pattern) ? config.color_pattern : d3.scale.category10().range(),
	callback = config.data_color,
	ids = [];

	return function (d) {
	var id = d.id \|\| (d.data && d.data.id) \|\| d, color;

	// if callback function is provided
	if (colors[id] instanceof Function) {
	color = colors[id](d);
	}
	// if specified, choose that color
	else if (colors[id]) {
	color = colors[id];
	}
	// if not specified, choose from pattern
	else {
	if (ids.indexOf(id) < 0) { ids.push(id); }
	color = pattern[ids.indexOf(id) % pattern.length];
	colors[id] = color;
	}
	return callback instanceof Function ? callback(color, d) : color;
	};
	};
	c3_chart_internal_fn.generateLevelColor = function () {
	var $$ = this, config = $$.config,
	colors = config.color_pattern,
	threshold = config.color_threshold,
	asValue = threshold.unit === 'value',
	values = threshold.values && threshold.values.length ? threshold.values : [],
	max = threshold.max \|\| 100;
	return notEmpty(config.color_threshold) ? function (value) {
	var i, v, color = colors[colors.length - 1];
	for (i = 0; i < values.length; i++) {
	v = asValue ? value : (value * 100 / max);
	if (v < values[i]) {
	color = colors[i];
	break;
	}
	}
	return color;
	} : null;
	};

	c3_chart_internal_fn.getYFormat = function (forArc) {
	var $$ = this,
	formatForY = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.yFormat,
	formatForY2 = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.y2Format;
	return function (v, ratio, id) {
	var format = $$.axis.getId(id) === 'y2' ? formatForY2 : formatForY;
	return format.call($$, v, ratio);
	};
	};
	c3_chart_internal_fn.yFormat = function (v) {
	var $$ = this, config = $$.config,
	format = config.axis_y_tick_format ? config.axis_y_tick_format : $$.defaultValueFormat;
	return format(v);
	};
	c3_chart_internal_fn.y2Format = function (v) {
	var $$ = this, config = $$.config,
	format = config.axis_y2_tick_format ? config.axis_y2_tick_format : $$.defaultValueFormat;
	return format(v);
	};
	c3_chart_internal_fn.defaultValueFormat = function (v) {
	return isValue(v) ? +v : "";
	};
	c3_chart_internal_fn.defaultArcValueFormat = function (v, ratio) {
	return (ratio * 100).toFixed(1) + '%';
	};
	c3_chart_internal_fn.dataLabelFormat = function (targetId) {
	var $$ = this, data_labels = $$.config.data_labels,
	format, defaultFormat = function (v) { return isValue(v) ? +v : ""; };
	// find format according to axis id
	if (typeof data_labels.format === 'function') {
	format = data_labels.format;
	} else if (typeof data_labels.format === 'object') {
	if (data_labels.format[targetId]) {
	format = data_labels.format[targetId] === true ? defaultFormat : data_labels.format[targetId];
	} else {
	format = function () { return ''; };
	}
	} else {
	format = defaultFormat;
	}
	return format;
	};

	c3_chart_internal_fn.hasCaches = function (ids) {
	for (var i = 0; i < ids.length; i++) {
	if (! (ids[i] in this.cache)) { return false; }
	}
	return true;
	};
	c3_chart_internal_fn.addCache = function (id, target) {
	this.cache[id] = this.cloneTarget(target);
	};
	c3_chart_internal_fn.getCaches = function (ids) {
	var targets = [], i;
	for (i = 0; i < ids.length; i++) {
	if (ids[i] in this.cache) { targets.push(this.cloneTarget(this.cache[ids[i]])); }
	}
	return targets;
	};

	var CLASS = c3_chart_internal_fn.CLASS = {
	target: 'c3-target',
	chart: 'c3-chart',
	chartLine: 'c3-chart-line',
	chartLines: 'c3-chart-lines',
	chartBar: 'c3-chart-bar',
	chartBars: 'c3-chart-bars',
	chartText: 'c3-chart-text',
	chartTexts: 'c3-chart-texts',
	chartArc: 'c3-chart-arc',
	chartArcs: 'c3-chart-arcs',
	chartArcsTitle: 'c3-chart-arcs-title',
	chartArcsBackground: 'c3-chart-arcs-background',
	chartArcsGaugeUnit: 'c3-chart-arcs-gauge-unit',
	chartArcsGaugeMax: 'c3-chart-arcs-gauge-max',
	chartArcsGaugeMin: 'c3-chart-arcs-gauge-min',
	selectedCircle: 'c3-selected-circle',
	selectedCircles: 'c3-selected-circles',
	eventRect: 'c3-event-rect',
	eventRects: 'c3-event-rects',
	eventRectsSingle: 'c3-event-rects-single',
	eventRectsMultiple: 'c3-event-rects-multiple',
	zoomRect: 'c3-zoom-rect',
	brush: 'c3-brush',
	focused: 'c3-focused',
	defocused: 'c3-defocused',
	region: 'c3-region',
	regions: 'c3-regions',
	tooltipContainer: 'c3-tooltip-container',
	tooltip: 'c3-tooltip',
	tooltipName: 'c3-tooltip-name',
	shape: 'c3-shape',
	shapes: 'c3-shapes',
	line: 'c3-line',
	lines: 'c3-lines',
	bar: 'c3-bar',
	bars: 'c3-bars',
	circle: 'c3-circle',
	circles: 'c3-circles',
	arc: 'c3-arc',
	arcs: 'c3-arcs',
	area: 'c3-area',
	areas: 'c3-areas',
	empty: 'c3-empty',
	text: 'c3-text',
	texts: 'c3-texts',
	gaugeValue: 'c3-gauge-value',
	grid: 'c3-grid',
	gridLines: 'c3-grid-lines',
	xgrid: 'c3-xgrid',
	xgrids: 'c3-xgrids',
	xgridLine: 'c3-xgrid-line',
	xgridLines: 'c3-xgrid-lines',
	xgridFocus: 'c3-xgrid-focus',
	ygrid: 'c3-ygrid',
	ygrids: 'c3-ygrids',
	ygridLine: 'c3-ygrid-line',
	ygridLines: 'c3-ygrid-lines',
	axis: 'c3-axis',
	axisX: 'c3-axis-x',
	axisXLabel: 'c3-axis-x-label',
	axisY: 'c3-axis-y',
	axisYLabel: 'c3-axis-y-label',
	axisY2: 'c3-axis-y2',
	axisY2Label: 'c3-axis-y2-label',
	legendBackground: 'c3-legend-background',
	legendItem: 'c3-legend-item',
	legendItemEvent: 'c3-legend-item-event',
	legendItemTile: 'c3-legend-item-tile',
	legendItemHidden: 'c3-legend-item-hidden',
	legendItemFocused: 'c3-legend-item-focused',
	dragarea: 'c3-dragarea',
	EXPANDED: '_expanded_',
	SELECTED: '_selected_',
	INCLUDED: '_included_'
	};
	c3_chart_internal_fn.generateClass = function (prefix, targetId) {
	return " " + prefix + " " + prefix + this.getTargetSelectorSuffix(targetId);
	};
	c3_chart_internal_fn.classText = function (d) {
	return this.generateClass(CLASS.text, d.index);
	};
	c3_chart_internal_fn.classTexts = function (d) {
	return this.generateClass(CLASS.texts, d.id);
	};
	c3_chart_internal_fn.classShape = function (d) {
	return this.generateClass(CLASS.shape, d.index);
	};
	c3_chart_internal_fn.classShapes = function (d) {
	return this.generateClass(CLASS.shapes, d.id);
	};
	c3_chart_internal_fn.classLine = function (d) {
	return this.classShape(d) + this.generateClass(CLASS.line, d.id);
	};
	c3_chart_internal_fn.classLines = function (d) {
	return this.classShapes(d) + this.generateClass(CLASS.lines, d.id);
	};
	c3_chart_internal_fn.classCircle = function (d) {
	return this.classShape(d) + this.generateClass(CLASS.circle, d.index);
	};
	c3_chart_internal_fn.classCircles = function (d) {
	return this.classShapes(d) + this.generateClass(CLASS.circles, d.id);
	};
	c3_chart_internal_fn.classBar = function (d) {
	return this.classShape(d) + this.generateClass(CLASS.bar, d.index);
	};
	c3_chart_internal_fn.classBars = function (d) {
	return this.classShapes(d) + this.generateClass(CLASS.bars, d.id);
	};
	c3_chart_internal_fn.classArc = function (d) {
	return this.classShape(d.data) + this.generateClass(CLASS.arc, d.data.id);
	};
	c3_chart_internal_fn.classArcs = function (d) {
	return this.classShapes(d.data) + this.generateClass(CLASS.arcs, d.data.id);
	};
	c3_chart_internal_fn.classArea = function (d) {
	return this.classShape(d) + this.generateClass(CLASS.area, d.id);
	};
	c3_chart_internal_fn.classAreas = function (d) {
	return this.classShapes(d) + this.generateClass(CLASS.areas, d.id);
	};
	c3_chart_internal_fn.classRegion = function (d, i) {
	return this.generateClass(CLASS.region, i) + ' ' + ('class' in d ? d['class'] : '');
	};
	c3_chart_internal_fn.classEvent = function (d) {
	return this.generateClass(CLASS.eventRect, d.index);
	};
	c3_chart_internal_fn.classTarget = function (id) {
	var $$ = this;
	var additionalClassSuffix = $$.config.data_classes[id], additionalClass = '';
	if (additionalClassSuffix) {
	additionalClass = ' ' + CLASS.target + '-' + additionalClassSuffix;
	}
	return $$.generateClass(CLASS.target, id) + additionalClass;
	};
	c3_chart_internal_fn.classFocus = function (d) {
	return this.classFocused(d) + this.classDefocused(d);
	};
	c3_chart_internal_fn.classFocused = function (d) {
	return ' ' + (this.focusedTargetIds.indexOf(d.id) >= 0 ? CLASS.focused : '');
	};
	c3_chart_internal_fn.classDefocused = function (d) {
	return ' ' + (this.defocusedTargetIds.indexOf(d.id) >= 0 ? CLASS.defocused : '');
	};
	c3_chart_internal_fn.classChartText = function (d) {
	return CLASS.chartText + this.classTarget(d.id);
	};
	c3_chart_internal_fn.classChartLine = function (d) {
	return CLASS.chartLine + this.classTarget(d.id);
	};
	c3_chart_internal_fn.classChartBar = function (d) {
	return CLASS.chartBar + this.classTarget(d.id);
	};
	c3_chart_internal_fn.classChartArc = function (d) {
	return CLASS.chartArc + this.classTarget(d.data.id);
	};
	c3_chart_internal_fn.getTargetSelectorSuffix = function (targetId) {
	return targetId \|\| targetId === 0 ? ('-' + targetId).replace(/[\s?!@#$%^&*()_=+,.<>'":;\[\]\/\|~`{}\\]/g, '-') : '';
	};
	c3_chart_internal_fn.selectorTarget = function (id, prefix) {
	return (prefix \|\| '') + '.' + CLASS.target + this.getTargetSelectorSuffix(id);
	};
	c3_chart_internal_fn.selectorTargets = function (ids, prefix) {
	var $$ = this;
	ids = ids \|\| [];
	return ids.length ? ids.map(function (id) { return $$.selectorTarget(id, prefix); }) : null;
	};
	c3_chart_internal_fn.selectorLegend = function (id) {
	return '.' + CLASS.legendItem + this.getTargetSelectorSuffix(id);
	};
	c3_chart_internal_fn.selectorLegends = function (ids) {
	var $$ = this;
	return ids && ids.length ? ids.map(function (id) { return $$.selectorLegend(id); }) : null;
	};

	var isValue = c3_chart_internal_fn.isValue = function (v) {
	return v \|\| v === 0;
	},
	isFunction = c3_chart_internal_fn.isFunction = function (o) {
	return typeof o === 'function';
	},
	isString = c3_chart_internal_fn.isString = function (o) {
	return typeof o === 'string';
	},
	isUndefined = c3_chart_internal_fn.isUndefined = function (v) {
	return typeof v === 'undefined';
	},
	isDefined = c3_chart_internal_fn.isDefined = function (v) {
	return typeof v !== 'undefined';
	},
	ceil10 = c3_chart_internal_fn.ceil10 = function (v) {
	return Math.ceil(v / 10) * 10;
	},
	asHalfPixel = c3_chart_internal_fn.asHalfPixel = function (n) {
	return Math.ceil(n) + 0.5;
	},
	diffDomain = c3_chart_internal_fn.diffDomain = function (d) {
	return d[1] - d[0];
	},
	isEmpty = c3_chart_internal_fn.isEmpty = function (o) {
	return !o \|\| (isString(o) && o.length === 0) \|\| (typeof o === 'object' && Object.keys(o).length === 0);
	},
	notEmpty = c3_chart_internal_fn.notEmpty = function (o) {
	return Object.keys(o).length > 0;
	},
	getOption = c3_chart_internal_fn.getOption = function (options, key, defaultValue) {
	return isDefined(options[key]) ? options[key] : defaultValue;
	},
	hasValue = c3_chart_internal_fn.hasValue = function (dict, value) {
	var found = false;
	Object.keys(dict).forEach(function (key) {
	if (dict[key] === value) { found = true; }
	});
	return found;
	},
	getPathBox = c3_chart_internal_fn.getPathBox = function (path) {
	var box = path.getBoundingClientRect(),
	items = [path.pathSegList.getItem(0), path.pathSegList.getItem(1)],
	minX = items[0].x, minY = Math.min(items[0].y, items[1].y);
	return {x: minX, y: minY, width: box.width, height: box.height};
	};

	c3_chart_fn.focus = function (targetIds) {
	var $$ = this.internal, candidates;

	targetIds = $$.mapToTargetIds(targetIds);
	candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))),

	this.revert();
	this.defocus();
	candidates.classed(CLASS.focused, true).classed(CLASS.defocused, false);
	if ($$.hasArcType()) {
	$$.expandArc(targetIds);
	}
	$$.toggleFocusLegend(targetIds, true);

	$$.focusedTargetIds = targetIds;
	$$.defocusedTargetIds = $$.defocusedTargetIds.filter(function (id) {
	return targetIds.indexOf(id) < 0;
	});
	};

	c3_chart_fn.defocus = function (targetIds) {
	var $$ = this.internal, candidates;

	targetIds = $$.mapToTargetIds(targetIds);
	candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))),

	candidates.classed(CLASS.focused, false).classed(CLASS.defocused, true);
	if ($$.hasArcType()) {
	$$.unexpandArc(targetIds);
	}
	$$.toggleFocusLegend(targetIds, false);

	$$.focusedTargetIds = $$.focusedTargetIds.filter(function (id) {
	return targetIds.indexOf(id) < 0;
	});
	$$.defocusedTargetIds = targetIds;
	};

	c3_chart_fn.revert = function (targetIds) {
	var $$ = this.internal, candidates;

	targetIds = $$.mapToTargetIds(targetIds);
	candidates = $$.svg.selectAll($$.selectorTargets(targetIds)); // should be for all targets

	candidates.classed(CLASS.focused, false).classed(CLASS.defocused, false);
	if ($$.hasArcType()) {
	$$.unexpandArc(targetIds);
	}
	if ($$.config.legend_show) {
	$$.showLegend(targetIds.filter($$.isLegendToShow.bind($$)));
	$$.legend.selectAll($$.selectorLegends(targetIds))
	.filter(function () {
	return $$.d3.select(this).classed(CLASS.legendItemFocused);
	})
	.classed(CLASS.legendItemFocused, false);
	}

	$$.focusedTargetIds = [];
	$$.defocusedTargetIds = [];
	};

	c3_chart_fn.show = function (targetIds, options) {
	var $$ = this.internal, targets;

	targetIds = $$.mapToTargetIds(targetIds);
	options = options \|\| {};

	$$.removeHiddenTargetIds(targetIds);
	targets = $$.svg.selectAll($$.selectorTargets(targetIds));

	targets.transition()
	.style('opacity', 1, 'important')
	.call($$.endall, function () {
	targets.style('opacity', null).style('opacity', 1);
	});

	if (options.withLegend) {
	$$.showLegend(targetIds);
	}

	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true});
	};

	c3_chart_fn.hide = function (targetIds, options) {
	var $$ = this.internal, targets;

	targetIds = $$.mapToTargetIds(targetIds);
	options = options \|\| {};

	$$.addHiddenTargetIds(targetIds);
	targets = $$.svg.selectAll($$.selectorTargets(targetIds));

	targets.transition()
	.style('opacity', 0, 'important')
	.call($$.endall, function () {
	targets.style('opacity', null).style('opacity', 0);
	});

	if (options.withLegend) {
	$$.hideLegend(targetIds);
	}

	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true});
	};

	c3_chart_fn.toggle = function (targetIds, options) {
	var that = this, $$ = this.internal;
	$$.mapToTargetIds(targetIds).forEach(function (targetId) {
	$$.isTargetToShow(targetId) ? that.hide(targetId, options) : that.show(targetId, options);
	});
	};

	c3_chart_fn.zoom = function (domain) {
	var $$ = this.internal;
	if (domain) {
	if ($$.isTimeSeries()) {
	domain = domain.map(function (x) { return $$.parseDate(x); });
	}
	$$.brush.extent(domain);
	$$.redraw({withUpdateXDomain: true, withY: $$.config.zoom_rescale});
	$$.config.zoom_onzoom.call(this, $$.x.orgDomain());
	}
	return $$.brush.extent();
	};
	c3_chart_fn.zoom.enable = function (enabled) {
	var $$ = this.internal;
	$$.config.zoom_enabled = enabled;
	$$.updateAndRedraw();
	};
	c3_chart_fn.unzoom = function () {
	var $$ = this.internal;
	$$.brush.clear().update();
	$$.redraw({withUpdateXDomain: true});
	};

	c3_chart_fn.load = function (args) {
	var $$ = this.internal, config = $$.config;
	// update xs if specified
	if (args.xs) {
	$$.addXs(args.xs);
	}
	// update classes if exists
	if ('classes' in args) {
	Object.keys(args.classes).forEach(function (id) {
	config.data_classes[id] = args.classes[id];
	});
	}
	// update categories if exists
	if ('categories' in args && $$.isCategorized()) {
	config.axis_x_categories = args.categories;
	}
	// update axes if exists
	if ('axes' in args) {
	Object.keys(args.axes).forEach(function (id) {
	config.data_axes[id] = args.axes[id];
	});
	}
	// update colors if exists
	if ('colors' in args) {
	Object.keys(args.colors).forEach(function (id) {
	config.data_colors[id] = args.colors[id];
	});
	}
	// use cache if exists
	if ('cacheIds' in args && $$.hasCaches(args.cacheIds)) {
	$$.load($$.getCaches(args.cacheIds), args.done);
	return;
	}
	// unload if needed
	if ('unload' in args) {
	// TODO: do not unload if target will load (included in url/rows/columns)
	$$.unload($$.mapToTargetIds((typeof args.unload === 'boolean' && args.unload) ? null : args.unload), function () {
	$$.loadFromArgs(args);
	});
	} else {
	$$.loadFromArgs(args);
	}
	};

	c3_chart_fn.unload = function (args) {
	var $$ = this.internal;
	args = args \|\| {};
	if (args instanceof Array) {
	args = {ids: args};
	} else if (typeof args === 'string') {
	args = {ids: [args]};
	}
	$$.unload($$.mapToTargetIds(args.ids), function () {
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true});
	if (args.done) { args.done(); }
	});
	};

	c3_chart_fn.flow = function (args) {
	var $$ = this.internal,
	targets, data, notfoundIds = [], orgDataCount = $$.getMaxDataCount(),
	dataCount, domain, baseTarget, baseValue, length = 0, tail = 0, diff, to;

	if (args.json) {
	data = $$.convertJsonToData(args.json, args.keys);
	}
	else if (args.rows) {
	data = $$.convertRowsToData(args.rows);
	}
	else if (args.columns) {
	data = $$.convertColumnsToData(args.columns);
	}
	else {
	return;
	}
	targets = $$.convertDataToTargets(data, true);

	// Update/Add data
	$$.data.targets.forEach(function (t) {
	var found = false, i, j;
	for (i = 0; i < targets.length; i++) {
	if (t.id === targets[i].id) {
	found = true;

	if (t.values[t.values.length - 1]) {
	tail = t.values[t.values.length - 1].index + 1;
	}
	length = targets[i].values.length;

	for (j = 0; j < length; j++) {
	targets[i].values[j].index = tail + j;
	if (!$$.isTimeSeries()) {
	targets[i].values[j].x = tail + j;
	}
	}
	t.values = t.values.concat(targets[i].values);

	targets.splice(i, 1);
	break;
	}
	}
	if (!found) { notfoundIds.push(t.id); }
	});

	// Append null for not found targets
	$$.data.targets.forEach(function (t) {
	var i, j;
	for (i = 0; i < notfoundIds.length; i++) {
	if (t.id === notfoundIds[i]) {
	tail = t.values[t.values.length - 1].index + 1;
	for (j = 0; j < length; j++) {
	t.values.push({
	id: t.id,
	index: tail + j,
	x: $$.isTimeSeries() ? $$.getOtherTargetX(tail + j) : tail + j,
	value: null
	});
	}
	}
	}
	});

	// Generate null values for new target
	if ($$.data.targets.length) {
	targets.forEach(function (t) {
	var i, missing = [];
	for (i = $$.data.targets[0].values[0].index; i < tail; i++) {
	missing.push({
	id: t.id,
	index: i,
	x: $$.isTimeSeries() ? $$.getOtherTargetX(i) : i,
	value: null
	});
	}
	t.values.forEach(function (v) {
	v.index += tail;
	if (!$$.isTimeSeries()) {
	v.x += tail;
	}
	});
	t.values = missing.concat(t.values);
	});
	}
	$$.data.targets = $$.data.targets.concat(targets); // add remained

	// check data count because behavior needs to change when it's only one
	dataCount = $$.getMaxDataCount();
	baseTarget = $$.data.targets[0];
	baseValue = baseTarget.values[0];

	// Update length to flow if needed
	if (isDefined(args.to)) {
	length = 0;
	to = $$.isTimeSeries() ? $$.parseDate(args.to) : args.to;
	baseTarget.values.forEach(function (v) {
	if (v.x < to) { length++; }
	});
	} else if (isDefined(args.length)) {
	length = args.length;
	}

	// If only one data, update the domain to flow from left edge of the chart
	if (!orgDataCount) {
	if ($$.isTimeSeries()) {
	if (baseTarget.values.length > 1) {
	diff = baseTarget.values[baseTarget.values.length - 1].x - baseValue.x;
	} else {
	diff = baseValue.x - $$.getXDomain($$.data.targets)[0];
	}
	} else {
	diff = 1;
	}
	domain = [baseValue.x - diff, baseValue.x];
	$$.updateXDomain(null, true, true, false, domain);
	} else if (orgDataCount === 1) {
	if ($$.isTimeSeries()) {
	diff = (baseTarget.values[baseTarget.values.length - 1].x - baseValue.x) / 2;
	domain = [new Date(+baseValue.x - diff), new Date(+baseValue.x + diff)];
	$$.updateXDomain(null, true, true, false, domain);
	}
	}

	// Set targets
	$$.updateTargets($$.data.targets);

	// Redraw with new targets
	$$.redraw({
	flow: {
	index: baseValue.index,
	length: length,
	duration: isValue(args.duration) ? args.duration : $$.config.transition_duration,
	done: args.done,
	orgDataCount: orgDataCount,
	},
	withLegend: true,
	withTransition: orgDataCount > 1,
	withTrimXDomain: false,
	withUpdateXAxis: true,
	});
	};

	c3_chart_internal_fn.generateFlow = function (args) {
	var $$ = this, config = $$.config, d3 = $$.d3;

	return function () {
	var targets = args.targets,
	flow = args.flow,
	drawBar = args.drawBar,
	drawLine = args.drawLine,
	drawArea = args.drawArea,
	cx = args.cx,
	cy = args.cy,
	xv = args.xv,
	xForText = args.xForText,
	yForText = args.yForText,
	duration = args.duration;

	var translateX, scaleX = 1, transform,
	flowIndex = flow.index,
	flowLength = flow.length,
	flowStart = $$.getValueOnIndex($$.data.targets[0].values, flowIndex),
	flowEnd = $$.getValueOnIndex($$.data.targets[0].values, flowIndex + flowLength),
	orgDomain = $$.x.domain(), domain,
	durationForFlow = flow.duration \|\| duration,
	done = flow.done \|\| function () {},
	wait = $$.generateWait();

	var xgrid = $$.xgrid \|\| d3.selectAll([]),
	xgridLines = $$.xgridLines \|\| d3.selectAll([]),
	mainRegion = $$.mainRegion \|\| d3.selectAll([]),
	mainText = $$.mainText \|\| d3.selectAll([]),
	mainBar = $$.mainBar \|\| d3.selectAll([]),
	mainLine = $$.mainLine \|\| d3.selectAll([]),
	mainArea = $$.mainArea \|\| d3.selectAll([]),
	mainCircle = $$.mainCircle \|\| d3.selectAll([]);

	// set flag
	$$.flowing = true;

	// remove head data after rendered
	$$.data.targets.forEach(function (d) {
	d.values.splice(0, flowLength);
	});

	// update x domain to generate axis elements for flow
	domain = $$.updateXDomain(targets, true, true);
	// update elements related to x scale
	if ($$.updateXGrid) { $$.updateXGrid(true); }

	// generate transform to flow
	if (!flow.orgDataCount) { // if empty
	if ($$.data.targets[0].values.length !== 1) {
	translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
	} else {
	if ($$.isTimeSeries()) {
	flowStart = $$.getValueOnIndex($$.data.targets[0].values, 0);
	flowEnd = $$.getValueOnIndex($$.data.targets[0].values, $$.data.targets[0].values.length - 1);
	translateX = $$.x(flowStart.x) - $$.x(flowEnd.x);
	} else {
	translateX = diffDomain(domain) / 2;
	}
	}
	} else if (flow.orgDataCount === 1 \|\| flowStart.x === flowEnd.x) {
	translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
	} else {
	if ($$.isTimeSeries()) {
	translateX = ($$.x(orgDomain[0]) - $$.x(domain[0]));
	} else {
	translateX = ($$.x(flowStart.x) - $$.x(flowEnd.x));
	}
	}
	scaleX = (diffDomain(orgDomain) / diffDomain(domain));
	transform = 'translate(' + translateX + ',0) scale(' + scaleX + ',1)';

	// hide tooltip
	$$.hideXGridFocus();
	$$.hideTooltip();

	d3.transition().ease('linear').duration(durationForFlow).each(function () {
	wait.add($$.axes.x.transition().call($$.xAxis));
	wait.add(mainBar.transition().attr('transform', transform));
	wait.add(mainLine.transition().attr('transform', transform));
	wait.add(mainArea.transition().attr('transform', transform));
	wait.add(mainCircle.transition().attr('transform', transform));
	wait.add(mainText.transition().attr('transform', transform));
	wait.add(mainRegion.filter($$.isRegionOnX).transition().attr('transform', transform));
	wait.add(xgrid.transition().attr('transform', transform));
	wait.add(xgridLines.transition().attr('transform', transform));
	})
	.call(wait, function () {
	var i, shapes = [], texts = [], eventRects = [];

	// remove flowed elements
	if (flowLength) {
	for (i = 0; i < flowLength; i++) {
	shapes.push('.' + CLASS.shape + '-' + (flowIndex + i));
	texts.push('.' + CLASS.text + '-' + (flowIndex + i));
	eventRects.push('.' + CLASS.eventRect + '-' + (flowIndex + i));
	}
	$$.svg.selectAll('.' + CLASS.shapes).selectAll(shapes).remove();
	$$.svg.selectAll('.' + CLASS.texts).selectAll(texts).remove();
	$$.svg.selectAll('.' + CLASS.eventRects).selectAll(eventRects).remove();
	$$.svg.select('.' + CLASS.xgrid).remove();
	}

	// draw again for removing flowed elements and reverting attr
	xgrid
	.attr('transform', null)
	.attr($$.xgridAttr);
	xgridLines
	.attr('transform', null);
	xgridLines.select('line')
	.attr("x1", config.axis_rotated ? 0 : xv)
	.attr("x2", config.axis_rotated ? $$.width : xv);
	xgridLines.select('text')
	.attr("x", config.axis_rotated ? $$.width : 0)
	.attr("y", xv);
	mainBar
	.attr('transform', null)
	.attr("d", drawBar);
	mainLine
	.attr('transform', null)
	.attr("d", drawLine);
	mainArea
	.attr('transform', null)
	.attr("d", drawArea);
	mainCircle
	.attr('transform', null)
	.attr("cx", cx)
	.attr("cy", cy);
	mainText
	.attr('transform', null)
	.attr('x', xForText)
	.attr('y', yForText)
	.style('fill-opacity', $$.opacityForText.bind($$));
	mainRegion
	.attr('transform', null);
	mainRegion.select('rect').filter($$.isRegionOnX)
	.attr("x", $$.regionX.bind($$))
	.attr("width", $$.regionWidth.bind($$));

	if (config.interaction_enabled) {
	$$.redrawEventRect();
	}

	// callback for end of flow
	done();

	$$.flowing = false;
	});
	};
	};

	c3_chart_fn.selected = function (targetId) {
	var $$ = this.internal, d3 = $$.d3;
	return d3.merge(
	$$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(targetId)).selectAll('.' + CLASS.shape)
	.filter(function () { return d3.select(this).classed(CLASS.SELECTED); })
	.map(function (d) { return d.map(function (d) { var data = d.__data__; return data.data ? data.data : data; }); })
	);
	};
	c3_chart_fn.select = function (ids, indices, resetOther) {
	var $$ = this.internal, d3 = $$.d3, config = $$.config;
	if (! config.data_selection_enabled) { return; }
	$$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
	var shape = d3.select(this), id = d.data ? d.data.id : d.id,
	toggle = $$.getToggle(this, d).bind($$),
	isTargetId = config.data_selection_grouped \|\| !ids \|\| ids.indexOf(id) >= 0,
	isTargetIndex = !indices \|\| indices.indexOf(i) >= 0,
	isSelected = shape.classed(CLASS.SELECTED);
	// line/area selection not supported yet
	if (shape.classed(CLASS.line) \|\| shape.classed(CLASS.area)) {
	return;
	}
	if (isTargetId && isTargetIndex) {
	if (config.data_selection_isselectable(d) && !isSelected) {
	toggle(true, shape.classed(CLASS.SELECTED, true), d, i);
	}
	} else if (isDefined(resetOther) && resetOther) {
	if (isSelected) {
	toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
	}
	}
	});
	};
	c3_chart_fn.unselect = function (ids, indices) {
	var $$ = this.internal, d3 = $$.d3, config = $$.config;
	if (! config.data_selection_enabled) { return; }
	$$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
	var shape = d3.select(this), id = d.data ? d.data.id : d.id,
	toggle = $$.getToggle(this, d).bind($$),
	isTargetId = config.data_selection_grouped \|\| !ids \|\| ids.indexOf(id) >= 0,
	isTargetIndex = !indices \|\| indices.indexOf(i) >= 0,
	isSelected = shape.classed(CLASS.SELECTED);
	// line/area selection not supported yet
	if (shape.classed(CLASS.line) \|\| shape.classed(CLASS.area)) {
	return;
	}
	if (isTargetId && isTargetIndex) {
	if (config.data_selection_isselectable(d)) {
	if (isSelected) {
	toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
	}
	}
	}
	});
	};

	c3_chart_fn.transform = function (type, targetIds) {
	var $$ = this.internal,
	options = ['pie', 'donut'].indexOf(type) >= 0 ? {withTransform: true} : null;
	$$.transformTo(targetIds, type, options);
	};

	c3_chart_internal_fn.transformTo = function (targetIds, type, optionsForRedraw) {
	var $$ = this,
	withTransitionForAxis = !$$.hasArcType(),
	options = optionsForRedraw \|\| {withTransitionForAxis: withTransitionForAxis};
	options.withTransitionForTransform = false;
	$$.transiting = false;
	$$.setTargetType(targetIds, type);
	$$.updateTargets($$.data.targets); // this is needed when transforming to arc
	$$.updateAndRedraw(options);
	};

	c3_chart_fn.groups = function (groups) {
	var $$ = this.internal, config = $$.config;
	if (isUndefined(groups)) { return config.data_groups; }
	config.data_groups = groups;
	$$.redraw();
	return config.data_groups;
	};

	c3_chart_fn.xgrids = function (grids) {
	var $$ = this.internal, config = $$.config;
	if (! grids) { return config.grid_x_lines; }
	config.grid_x_lines = grids;
	$$.redrawWithoutRescale();
	return config.grid_x_lines;
	};
	c3_chart_fn.xgrids.add = function (grids) {
	var $$ = this.internal;
	return this.xgrids($$.config.grid_x_lines.concat(grids ? grids : []));
	};
	c3_chart_fn.xgrids.remove = function (params) { // TODO: multiple
	var $$ = this.internal;
	$$.removeGridLines(params, true);
	};

	c3_chart_fn.ygrids = function (grids) {
	var $$ = this.internal, config = $$.config;
	if (! grids) { return config.grid_y_lines; }
	config.grid_y_lines = grids;
	$$.redrawWithoutRescale();
	return config.grid_y_lines;
	};
	c3_chart_fn.ygrids.add = function (grids) {
	var $$ = this.internal;
	return this.ygrids($$.config.grid_y_lines.concat(grids ? grids : []));
	};
	c3_chart_fn.ygrids.remove = function (params) { // TODO: multiple
	var $$ = this.internal;
	$$.removeGridLines(params, false);
	};

	c3_chart_fn.regions = function (regions) {
	var $$ = this.internal, config = $$.config;
	if (!regions) { return config.regions; }
	config.regions = regions;
	$$.redrawWithoutRescale();
	return config.regions;
	};
	c3_chart_fn.regions.add = function (regions) {
	var $$ = this.internal, config = $$.config;
	if (!regions) { return config.regions; }
	config.regions = config.regions.concat(regions);
	$$.redrawWithoutRescale();
	return config.regions;
	};
	c3_chart_fn.regions.remove = function (options) {
	var $$ = this.internal, config = $$.config,
	duration, classes, regions;

	options = options \|\| {};
	duration = $$.getOption(options, "duration", config.transition_duration);
	classes = $$.getOption(options, "classes", [CLASS.region]);

	regions = $$.main.select('.' + CLASS.regions).selectAll(classes.map(function (c) { return '.' + c; }));
	(duration ? regions.transition().duration(duration) : regions)
	.style('opacity', 0)
	.remove();

	config.regions = config.regions.filter(function (region) {
	var found = false;
	if (!region['class']) {
	return true;
	}
	region['class'].split(' ').forEach(function (c) {
	if (classes.indexOf(c) >= 0) { found = true; }
	});
	return !found;
	});

	return config.regions;
	};

	c3_chart_fn.data = function (targetIds) {
	var targets = this.internal.data.targets;
	return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
	return [].concat(targetIds).indexOf(t.id) >= 0;
	});
	};
	c3_chart_fn.data.shown = function (targetIds) {
	return this.internal.filterTargetsToShow(this.data(targetIds));
	};
	c3_chart_fn.data.values = function (targetId) {
	var targets, values = null;
	if (targetId) {
	targets = this.data(targetId);
	values = targets[0] ? targets[0].values.map(function (d) { return d.value; }) : null;
	}
	return values;
	};
	c3_chart_fn.data.names = function (names) {
	this.internal.clearLegendItemTextBoxCache();
	return this.internal.updateDataAttributes('names', names);
	};
	c3_chart_fn.data.colors = function (colors) {
	return this.internal.updateDataAttributes('colors', colors);
	};
	c3_chart_fn.data.axes = function (axes) {
	return this.internal.updateDataAttributes('axes', axes);
	};

	c3_chart_fn.category = function (i, category) {
	var $$ = this.internal, config = $$.config;
	if (arguments.length > 1) {
	config.axis_x_categories[i] = category;
	$$.redraw();
	}
	return config.axis_x_categories[i];
	};
	c3_chart_fn.categories = function (categories) {
	var $$ = this.internal, config = $$.config;
	if (!arguments.length) { return config.axis_x_categories; }
	config.axis_x_categories = categories;
	$$.redraw();
	return config.axis_x_categories;
	};

	// TODO: fix
	c3_chart_fn.color = function (id) {
	var $$ = this.internal;
	return $$.color(id); // more patterns
	};

	c3_chart_fn.x = function (x) {
	var $$ = this.internal;
	if (arguments.length) {
	$$.updateTargetX($$.data.targets, x);
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true});
	}
	return $$.data.xs;
	};
	c3_chart_fn.xs = function (xs) {
	var $$ = this.internal;
	if (arguments.length) {
	$$.updateTargetXs($$.data.targets, xs);
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true});
	}
	return $$.data.xs;
	};

	c3_chart_fn.axis = function () {};
	c3_chart_fn.axis.labels = function (labels) {
	var $$ = this.internal;
	if (arguments.length) {
	Object.keys(labels).forEach(function (axisId) {
	$$.axis.setLabelText(axisId, labels[axisId]);
	});
	$$.axis.updateLabels();
	}
	// TODO: return some values?
	};
	c3_chart_fn.axis.max = function (max) {
	var $$ = this.internal, config = $$.config;
	if (arguments.length) {
	if (typeof max === 'object') {
	if (isValue(max.x)) { config.axis_x_max = max.x; }
	if (isValue(max.y)) { config.axis_y_max = max.y; }
	if (isValue(max.y2)) { config.axis_y2_max = max.y2; }
	} else {
	config.axis_y_max = config.axis_y2_max = max;
	}
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true});
	} else {
	return {
	x: config.axis_x_max,
	y: config.axis_y_max,
	y2: config.axis_y2_max
	};
	}
	};
	c3_chart_fn.axis.min = function (min) {
	var $$ = this.internal, config = $$.config;
	if (arguments.length) {
	if (typeof min === 'object') {
	if (isValue(min.x)) { config.axis_x_min = min.x; }
	if (isValue(min.y)) { config.axis_y_min = min.y; }
	if (isValue(min.y2)) { config.axis_y2_min = min.y2; }
	} else {
	config.axis_y_min = config.axis_y2_min = min;
	}
	$$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true});
	} else {
	return {
	x: config.axis_x_min,
	y: config.axis_y_min,
	y2: config.axis_y2_min
	};
	}
	};
	c3_chart_fn.axis.range = function (range) {
	if (arguments.length) {
	if (isDefined(range.max)) { this.axis.max(range.max); }
	if (isDefined(range.min)) { this.axis.min(range.min); }
	} else {
	return {
	max: this.axis.max(),
	min: this.axis.min()
	};
	}
	};

	c3_chart_fn.legend = function () {};
	c3_chart_fn.legend.show = function (targetIds) {
	var $$ = this.internal;
	$$.showLegend($$.mapToTargetIds(targetIds));
	$$.updateAndRedraw({withLegend: true});
	};
	c3_chart_fn.legend.hide = function (targetIds) {
	var $$ = this.internal;
	$$.hideLegend($$.mapToTargetIds(targetIds));
	$$.updateAndRedraw({withLegend: true});
	};

	c3_chart_fn.resize = function (size) {
	var $$ = this.internal, config = $$.config;
	config.size_width = size ? size.width : null;
	config.size_height = size ? size.height : null;
	this.flush();
	};

	c3_chart_fn.flush = function () {
	var $$ = this.internal;
	$$.updateAndRedraw({withLegend: true, withTransition: false, withTransitionForTransform: false});
	};

	c3_chart_fn.destroy = function () {
	var $$ = this.internal;

	window.clearInterval($$.intervalForObserveInserted);
	window.onresize = null;

	$$.selectChart.classed('c3', false).html("");

	// MEMO: this is needed because the reference of some elements will not be released, then memory leak will happen.
	Object.keys($$).forEach(function (key) {
	$$[key] = null;
	});

	return null;
	};

	c3_chart_fn.tooltip = function () {};
	c3_chart_fn.tooltip.show = function (args) {
	var $$ = this.internal, index, mouse;

	// determine mouse position on the chart
	if (args.mouse) {
	mouse = args.mouse;
	}

	// determine focus data
	if (args.data) {
	if ($$.isMultipleX()) {
	// if multiple xs, target point will be determined by mouse
	mouse = [$$.x(args.data.x), $$.getYScale(args.data.id)(args.data.value)];
	index = null;
	} else {
	// TODO: when tooltip_grouped = false
	index = isValue(args.data.index) ? args.data.index : $$.getIndexByX(args.data.x);
	}
	}
	else if (typeof args.x !== 'undefined') {
	index = $$.getIndexByX(args.x);
	}
	else if (typeof args.index !== 'undefined') {
	index = args.index;
	}

	// emulate mouse events to show
	$$.dispatchEvent('mouseover', index, mouse);
	$$.dispatchEvent('mousemove', index, mouse);
	};
	c3_chart_fn.tooltip.hide = function () {
	// TODO: get target data by checking the state of focus
	this.internal.dispatchEvent('mouseout', 0);
	};

	// Features:
	// 1. category axis
	// 2. ceil values of translate/x/y to int for half pixel antialiasing
	// 3. multiline tick text
	var tickTextCharSize;
	function c3_axis(d3, params) {
	var scale = d3.scale.linear(), orient = "bottom", innerTickSize = 6, outerTickSize, tickPadding = 3, tickValues = null, tickFormat, tickArguments;

	var tickOffset = 0, tickCulling = true, tickCentered;

	params = params \|\| {};
	outerTickSize = params.withOuterTick ? 6 : 0;

	function axisX(selection, x) {
	selection.attr("transform", function (d) {
	return "translate(" + Math.ceil(x(d) + tickOffset) + ", 0)";
	});
	}
	function axisY(selection, y) {
	selection.attr("transform", function (d) {
	return "translate(0," + Math.ceil(y(d)) + ")";
	});
	}
	function scaleExtent(domain) {
	var start = domain[0], stop = domain[domain.length - 1];
	return start < stop ? [ start, stop ] : [ stop, start ];
	}
	function generateTicks(scale) {
	var i, domain, ticks = [];
	if (scale.ticks) {
	return scale.ticks.apply(scale, tickArguments);
	}
	domain = scale.domain();
	for (i = Math.ceil(domain[0]); i < domain[1]; i++) {
	ticks.push(i);
	}
	if (ticks.length > 0 && ticks[0] > 0) {
	ticks.unshift(ticks[0] - (ticks[1] - ticks[0]));
	}
	return ticks;
	}
	function copyScale() {
	var newScale = scale.copy(), domain;
	if (params.isCategory) {
	domain = scale.domain();
	newScale.domain([domain[0], domain[1] - 1]);
	}
	return newScale;
	}
	function textFormatted(v) {
	var formatted = tickFormat ? tickFormat(v) : v;
	return typeof formatted !== 'undefined' ? formatted : '';
	}
	function getSizeFor1Char(tick) {
	if (tickTextCharSize) {
	return tickTextCharSize;
	}
	var size = {
	h: 11.5,
	w: 5.5
	};
	tick.select('text').text(textFormatted).each(function (d) {
	var box = this.getBoundingClientRect(),
	text = textFormatted(d),
	h = box.height,
	w = text ? (box.width / text.length) : undefined;
	if (h && w) {
	size.h = h;
	size.w = w;
	}
	}).text('');
	tickTextCharSize = size;
	return size;
	}
	function transitionise(selection) {
	return params.withoutTransition ? selection : d3.transition(selection);
	}
	function axis(g) {
	g.each(function () {
	var g = axis.g = d3.select(this);

	var scale0 = this.__chart__ \|\| scale, scale1 = this.__chart__ = copyScale();

	var ticks = tickValues ? tickValues : generateTicks(scale1),
	tick = g.selectAll(".tick").data(ticks, scale1),
	tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", 1e-6),
	// MEMO: No exit transition. The reason is this transition affects max tick width calculation because old tick will be included in the ticks.
	tickExit = tick.exit().remove(),
	tickUpdate = transitionise(tick).style("opacity", 1),
	tickTransform, tickX, tickY;

	var range = scale.rangeExtent ? scale.rangeExtent() : scaleExtent(scale.range()),
	path = g.selectAll(".domain").data([ 0 ]),
	pathUpdate = (path.enter().append("path").attr("class", "domain"), transitionise(path));
	tickEnter.append("line");
	tickEnter.append("text");

	var lineEnter = tickEnter.select("line"),
	lineUpdate = tickUpdate.select("line"),
	textEnter = tickEnter.select("text"),
	textUpdate = tickUpdate.select("text");

	if (params.isCategory) {
	tickOffset = Math.ceil((scale1(1) - scale1(0)) / 2);
	tickX = tickCentered ? 0 : tickOffset;
	tickY = tickCentered ? tickOffset : 0;
	} else {
	tickOffset = tickX = 0;
	}

	var text, tspan, sizeFor1Char = getSizeFor1Char(g.select('.tick')), counts = [];
	var tickLength = Math.max(innerTickSize, 0) + tickPadding,
	isVertical = orient === 'left' \|\| orient === 'right';

	// this should be called only when category axis
	function splitTickText(d, maxWidth) {
	var tickText = textFormatted(d),
	subtext, spaceIndex, textWidth, splitted = [];

	if (Object.prototype.toString.call(tickText) === "[object Array]") {
	return tickText;
	}

	if (!maxWidth \|\| maxWidth <= 0) {
	maxWidth = isVertical ? 95 : params.isCategory ? (Math.ceil(scale1(ticks[1]) - scale1(ticks[0])) - 12) : 110;
	}

	function split(splitted, text) {
	spaceIndex = undefined;
	for (var i = 1; i < text.length; i++) {
	if (text.charAt(i) === ' ') {
	spaceIndex = i;
	}
	subtext = text.substr(0, i + 1);
	textWidth = sizeFor1Char.w * subtext.length;
	// if text width gets over tick width, split by space index or crrent index
	if (maxWidth < textWidth) {
	return split(
	splitted.concat(text.substr(0, spaceIndex ? spaceIndex : i)),
	text.slice(spaceIndex ? spaceIndex + 1 : i)
	);
	}
	}
	return splitted.concat(text);
	}

	return split(splitted, tickText + "");
	}

	function tspanDy(d, i) {
	var dy = sizeFor1Char.h;
	if (i === 0) {
	if (orient === 'left' \|\| orient === 'right') {
	dy = -((counts[d.index] - 1) * (sizeFor1Char.h / 2) - 3);
	} else {
	dy = ".71em";
	}
	}
	return dy;
	}

	function tickSize(d) {
	var tickPosition = scale(d) + (tickCentered ? 0 : tickOffset);
	return range[0] < tickPosition && tickPosition < range[1] ? innerTickSize : 0;
	}

	text = tick.select("text");
	tspan = text.selectAll('tspan')
	.data(function (d, i) {
	var splitted = params.tickMultiline ? splitTickText(d, params.tickWidth) : [].concat(textFormatted(d));
	counts[i] = splitted.length;
	return splitted.map(function (s) {
	return { index: i, splitted: s };
	});
	});
	tspan.enter().append('tspan');
	tspan.exit().remove();
	tspan.text(function (d) { return d.splitted; });

	var rotate = params.tickTextRotate;

	function textAnchorForText(rotate) {
	if (!rotate) {
	return 'middle';
	}
	return rotate > 0 ? "start" : "end";
	}
	function textTransform(rotate) {
	if (!rotate) {
	return '';
	}
	return "rotate(" + rotate + ")";
	}
	function dxForText(rotate) {
	if (!rotate) {
	return 0;
	}
	return 8 * Math.sin(Math.PI * (rotate / 180));
	}
	function yForText(rotate) {
	if (!rotate) {
	return tickLength;
	}
	return 11.5 - 2.5 * (rotate / 15) * (rotate > 0 ? 1 : -1);
	}

	switch (orient) {
	case "bottom":
	{
	tickTransform = axisX;
	lineEnter.attr("y2", innerTickSize);
	textEnter.attr("y", tickLength);
	lineUpdate.attr("x1", tickX).attr("x2", tickX).attr("y2", tickSize);
	textUpdate.attr("x", 0).attr("y", yForText(rotate))
	.style("text-anchor", textAnchorForText(rotate))
	.attr("transform", textTransform(rotate));
	tspan.attr('x', 0).attr("dy", tspanDy).attr('dx', dxForText(rotate));
	pathUpdate.attr("d", "M" + range[0] + "," + outerTickSize + "V0H" + range[1] + "V" + outerTickSize);
	break;
	}
	case "top":
	{
	// TODO: rotated tick text
	tickTransform = axisX;
	lineEnter.attr("y2", -innerTickSize);
	textEnter.attr("y", -tickLength);
	lineUpdate.attr("x2", 0).attr("y2", -innerTickSize);
	textUpdate.attr("x", 0).attr("y", -tickLength);
	text.style("text-anchor", "middle");
	tspan.attr('x', 0).attr("dy", "0em");
	pathUpdate.attr("d", "M" + range[0] + "," + -outerTickSize + "V0H" + range[1] + "V" + -outerTickSize);
	break;
	}
	case "left":
	{
	tickTransform = axisY;
	lineEnter.attr("x2", -innerTickSize);
	textEnter.attr("x", -tickLength);
	lineUpdate.attr("x2", -innerTickSize).attr("y1", tickY).attr("y2", tickY);
	textUpdate.attr("x", -tickLength).attr("y", tickOffset);
	text.style("text-anchor", "end");
	tspan.attr('x', -tickLength).attr("dy", tspanDy);
	pathUpdate.attr("d", "M" + -outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + -outerTickSize);
	break;
	}
	case "right":
	{
	tickTransform = axisY;
	lineEnter.attr("x2", innerTickSize);
	textEnter.attr("x", tickLength);
	lineUpdate.attr("x2", innerTickSize).attr("y2", 0);
	textUpdate.attr("x", tickLength).attr("y", 0);
	text.style("text-anchor", "start");
	tspan.attr('x', tickLength).attr("dy", tspanDy);
	pathUpdate.attr("d", "M" + outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + outerTickSize);
	break;
	}
	}
	if (scale1.rangeBand) {
	var x = scale1, dx = x.rangeBand() / 2;
	scale0 = scale1 = function (d) {
	return x(d) + dx;
	};
	} else if (scale0.rangeBand) {
	scale0 = scale1;
	} else {
	tickExit.call(tickTransform, scale1);
	}
	tickEnter.call(tickTransform, scale0);
	tickUpdate.call(tickTransform, scale1);
	});
	}
	axis.scale = function (x) {
	if (!arguments.length) { return scale; }
	scale = x;
	return axis;
	};
	axis.orient = function (x) {
	if (!arguments.length) { return orient; }
	orient = x in {top: 1, right: 1, bottom: 1, left: 1} ? x + "" : "bottom";
	return axis;
	};
	axis.tickFormat = function (format) {
	if (!arguments.length) { return tickFormat; }
	tickFormat = format;
	return axis;
	};
	axis.tickCentered = function (isCentered) {
	if (!arguments.length) { return tickCentered; }
	tickCentered = isCentered;
	return axis;
	};
	axis.tickOffset = function () {
	return tickOffset;
	};
	axis.tickInterval = function () {
	var interval, length;
	if (params.isCategory) {
	interval = tickOffset * 2;
	}
	else {
	length = axis.g.select('path.domain').node().getTotalLength() - outerTickSize * 2;
	interval = length / axis.g.selectAll('line').size();
	}
	return interval === Infinity ? 0 : interval;
	};
	axis.ticks = function () {
	if (!arguments.length) { return tickArguments; }
	tickArguments = arguments;
	return axis;
	};
	axis.tickCulling = function (culling) {
	if (!arguments.length) { return tickCulling; }
	tickCulling = culling;
	return axis;
	};
	axis.tickValues = function (x) {
	if (typeof x === 'function') {
	tickValues = function () {
	return x(scale.domain());
	};
	}
	else {
	if (!arguments.length) { return tickValues; }
	tickValues = x;
	}
	return axis;
	};
	return axis;
	}

	c3_chart_internal_fn.isSafari = function () {
	var ua = window.navigator.userAgent;
	return ua.indexOf('Safari') >= 0 && ua.indexOf('Chrome') < 0;
	};
	c3_chart_internal_fn.isChrome = function () {
	var ua = window.navigator.userAgent;
	return ua.indexOf('Chrome') >= 0;
	};

	// PhantomJS doesn't have support for Function.prototype.bind, which has caused confusion. Use
	// this polyfill to avoid the confusion.
	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind#Polyfill

	if (!Function.prototype.bind) {
	Function.prototype.bind = function(oThis) {
	if (typeof this !== 'function') {
	// closest thing possible to the ECMAScript 5
	// internal IsCallable function
	throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
	}

	var aArgs = Array.prototype.slice.call(arguments, 1),
	fToBind = this,
	fNOP = function() {},
	fBound = function() {
	return fToBind.apply(this instanceof fNOP ? this : oThis, aArgs.concat(Array.prototype.slice.call(arguments)));
	};

	fNOP.prototype = this.prototype;
	fBound.prototype = new fNOP();

	return fBound;
	};
	}

	if (typeof define === 'function' && define.amd) {
	define("c3", ["d3"], c3);
	} else if ('undefined' !== typeof exports && 'undefined' !== typeof module) {
	module.exports = c3;
	} else {
	window.c3 = c3;
	}

	})(window);

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