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phab/webroot/rsrc/js/application/differential/behavior-keyboard-nav.js
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behavior-keyboard-nav.js
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/**
* @provides javelin-behavior-differential-keyboard-navigation
* @requires javelin-behavior
* javelin-dom
* javelin-stratcom
* phabricator-keyboard-shortcut
*/
JX.behavior('differential-keyboard-navigation', function(config) {
var cursor = -1;
var changesets;
var selection_begin = null;
var selection_end = null;
var refreshFocus = function() {};
function init() {
if (changesets) {
return;
}
changesets = JX.DOM.scry(document.body, 'div', 'differential-changeset');
}
function getBlocks(cursor) {
// TODO: This might not be terribly fast; we can't currently memoize it
// because it can change as ajax requests come in (e.g., content loads).
var rows = JX.DOM.scry(changesets[cursor], 'tr');
var blocks = [[changesets[cursor], changesets[cursor]]];
var start = null;
var type;
var ii;
// Don't show code blocks inside a collapsed file.
var diff = JX.DOM.scry(changesets[cursor], 'table', 'differential-diff');
if (diff.length == 1 && JX.Stratcom.getData(diff[0]).hidden) {
return blocks;
}
function push() {
if (start) {
blocks.push([start, rows[ii - 1]]);
}
start = null;
}
for (ii = 0; ii < rows.length; ii++) {
type = getRowType(rows[ii]);
if (type == 'comment') {
// If we see these types of rows, make a block for each one.
push();
}
if (!type) {
push();
} else if (type && !start) {
start = rows[ii];
}
}
push();
return blocks;
}
function getRowType(row) {
// NOTE: Being somewhat over-general here to allow other types of objects
// to be easily focused in the future (inline comments, 'show more..').
if (row.className.indexOf('inline') !== -1) {
return 'comment';
}
if (row.className.indexOf('differential-changeset') !== -1) {
return 'file';
}
var cells = JX.DOM.scry(row, 'td');
for (var ii = 0; ii < cells.length; ii++) {
// NOTE: The semantic use of classnames here is for performance; don't
// emulate this elsewhere since it's super terrible.
if (cells[ii].className.indexOf('old') !== -1 ||
cells[ii].className.indexOf('new') !== -1) {
return 'change';
}
}
return null;
}
function jump(manager, delta, jump_to_type) {
init();
if (cursor < 0) {
if (delta < 0) {
// If the user goes "back" without a selection, just reject the action.
return;
} else {
cursor = 0;
}
}
while (true) {
var blocks = getBlocks(cursor);
var focus;
if (delta < 0) {
focus = blocks.length;
} else {
focus = -1;
}
for (var ii = 0; ii < blocks.length; ii++) {
if (blocks[ii][0] == selection_begin) {
focus = ii;
break;
}
}
while (true) {
focus += delta;
if (blocks[focus]) {
var row_type = getRowType(blocks[focus][0]);
if (jump_to_type && row_type != jump_to_type) {
continue;
}
selection_begin = blocks[focus][0];
selection_end = blocks[focus][1];
manager.scrollTo(selection_begin);
refreshFocus = function() {
manager.focusOn(selection_begin, selection_end);
};
refreshFocus();
return;
} else {
var adjusted = (cursor + delta);
if (adjusted < 0 || adjusted >= changesets.length) {
// Stop cursor movement when the user reaches either end.
return;
}
cursor = adjusted;
// Break the inner loop and go to the next file.
break;
}
}
}
}
// When inline comments are updated, wipe out our cache of blocks since
// comments may have been added or deleted.
JX.Stratcom.listen(
null,
'differential-inline-comment-update',
function() {
changesets = null;
});
// Same thing when a file is hidden or shown; don't want to highlight
// invisible code.
JX.Stratcom.listen(
'differential-toggle-file-toggled',
null,
function() {
changesets = null;
init();
refreshFocus();
});
var haunt_mode = 0;
function haunt() {
haunt_mode = (haunt_mode + 1) % 3;
var el = JX.$(config.haunt);
for (var ii = 1; ii <= 2; ii++) {
JX.DOM.alterClass(el, 'differential-haunt-mode-'+ii, (haunt_mode == ii));
}
}
new JX.KeyboardShortcut('j', 'Jump to next change.')
.setHandler(function(manager) {
jump(manager, 1);
})
.register();
new JX.KeyboardShortcut('k', 'Jump to previous change.')
.setHandler(function(manager) {
jump(manager, -1);
})
.register();
new JX.KeyboardShortcut('J', 'Jump to next file.')
.setHandler(function(manager) {
jump(manager, 1, 'file');
})
.register();
new JX.KeyboardShortcut('K', 'Jump to previous file.')
.setHandler(function(manager) {
jump(manager, -1, 'file');
})
.register();
new JX.KeyboardShortcut('n', 'Jump to next inline comment.')
.setHandler(function(manager) {
jump(manager, 1, 'comment');
})
.register();
new JX.KeyboardShortcut('p', 'Jump to previous inline comment.')
.setHandler(function(manager) {
jump(manager, -1, 'comment');
})
.register();
new JX.KeyboardShortcut('t', 'Jump to the table of contents.')
.setHandler(function(manager) {
var toc = JX.$('toc');
manager.scrollTo(toc);
})
.register();
new JX.KeyboardShortcut(
'h',
'Collapse or expand the file display (after jump).')
.setHandler(function() {
if (!changesets || !changesets[cursor]) {
return;
}
JX.Stratcom.invoke('differential-toggle-file', null, {
diff: JX.DOM.scry(changesets[cursor], 'table', 'differential-diff')
});
})
.register();
function inline_op(node, op) {
if (!JX.DOM.scry(node, 'a', 'differential-inline-' + op)) {
// No link for this operation, e.g. editing a comment you can't edit.
return;
}
var data = {
node: JX.DOM.find(node, 'div', 'differential-inline-comment'),
op: op
};
JX.Stratcom.invoke('differential-inline-action', null, data);
}
new JX.KeyboardShortcut('r', 'Reply to selected inline comment.')
.setHandler(function() {
inline_op(selection_begin, 'reply');
})
.register();
new JX.KeyboardShortcut('e', 'Edit selected inline comment.')
.setHandler(function() {
inline_op(selection_begin, 'edit');
})
.register();
if (config.haunt) {
new JX.KeyboardShortcut('z', 'Cycle comment panel haunting modes.')
.setHandler(haunt)
.register();
}
});
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