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R3600/modules/websearch/lib/websearch_hotkeys.js
ab315b00989dmaint-2.0

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websearch_hotkeys.js
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/*
* This file is part of Invenio.
* Copyright (C) 2012 CERN.
*
* Invenio is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* Invenio is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Invenio; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
/* A file contatining fuctions treating the hotkey shortcuts. */
!function( $ ){
"use strict"
var Hotkeys = function(options) {
/* make sure we call new operator first */
if (!(this instanceof Hotkeys))
return new Hotkeys(options)
this.options = $.extend({}, this.defaults, options)
this.init()
}
Hotkeys.fn = Hotkeys.prototype = {
constructor: Hotkeys
, defaults: {
timeout: 500 // how long should we keep buffer before reseting it?
}
, init: function() {
/*
* Initialize hotkeys.
*/
var that = this
this.setTimer()
this.clearBuffer()
this.data = {}
$('[data-hotkey-action="click"]').each(function(index, object) {
var key = $(object).attr('data-hotkey-value')
that.data[key] = $(object)
})
$(document).bind('keydown.esc', function(event) {
that.clearTimer()
that.clearBuffer()
})
$(document).bind('keydown', function(event) {
// Don't fire in text-accepting inputs that we didn't directly bind to
// important to note that $.fn.prop is only available on jquery 1.6+
if ( this !== event.target && (/textarea|select/i.test( event.target.nodeName ) ||
event.target.type === "text" || $(event.target).prop('contenteditable') == 'true' )) {
return;
}
var character = String.fromCharCode( event.which ).toLowerCase()
that.addCharacter(character)
that.action()
that.setTimer()
})
} // end init function
, clearTimer: function() {
if (this.timer)
clearTimeout(this.timer)
}
, setTimer: function() {
this.clearTimer()
var that = this
, c = function() {
that.clearBuffer()
}
this.timer = setTimeout(c, this.options['timeout'])
}
, clearBuffer: function() {
this.buffer = ''
}
, addCharacter: function(c) {
this.buffer += c
}
, isDefined: function() {
var key = String(this.buffer)
return (key in this.data)
}
, getCurrentObject: function() {
return this.data[this.buffer]
}
, action: function() {
if (this.isDefined()) {
window.location.href = this.getCurrentObject().attr('href')
/* should not be called becase of redirection */
this.clearBuffer()
this.clearTimer()
}
}
}
window.Hotkeys = Hotkeys
}( window.jQuery )
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