jquery-ui/ui/ui.core.js

/*
 * jQuery UI @VERSION
 *
 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 */
;jQuery.ui || (function($) {

var _remove = $.fn.remove,
	isFF2 = $.browser.mozilla && (parseFloat($.browser.version) < 1.9);

//Helper functions and ui object
$.ui = {
	version: "@VERSION",

	// $.ui.plugin is deprecated.  Use the proxy pattern instead.
	plugin: {
		add: function(module, option, set) {
			var proto = $.ui[module].prototype;
			for(var i in set) {
				proto.plugins[i] = proto.plugins[i] || [];
				proto.plugins[i].push([option, set[i]]);
			}
		},
		call: function(instance, name, args) {
			var set = instance.plugins[name];
			if(!set || !instance.element[0].parentNode) { return; }

			for (var i = 0; i < set.length; i++) {
				if (instance.options[set[i][0]]) {
					set[i][1].apply(instance.element, args);
				}
			}
		}
	},

	contains: function(a, b) {
		return document.compareDocumentPosition
			? a.compareDocumentPosition(b) & 16
			: a !== b && a.contains(b);
	},

	hasScroll: function(el, a) {

		//If overflow is hidden, the element might have extra content, but the user wants to hide it
		if ($(el).css('overflow') == 'hidden') { return false; }

		var scroll = (a && a == 'left') ? 'scrollLeft' : 'scrollTop',
			has = false;

		if (el[scroll] > 0) { return true; }

		// TODO: determine which cases actually cause this to happen
		// if the element doesn't have the scroll set, see if it's possible to
		// set the scroll
		el[scroll] = 1;
		has = (el[scroll] > 0);
		el[scroll] = 0;
		return has;
	},

	isOverAxis: function(x, reference, size) {
		//Determines when x coordinate is over "b" element axis
		return (x > reference) && (x < (reference + size));
	},

	isOver: function(y, x, top, left, height, width) {
		//Determines when x, y coordinates is over "b" element
		return $.ui.isOverAxis(y, top, height) && $.ui.isOverAxis(x, left, width);
	},

	keyCode: {
		BACKSPACE: 8,
		CAPS_LOCK: 20,
		COMMA: 188,
		CONTROL: 17,
		DELETE: 46,
		DOWN: 40,
		END: 35,
		ENTER: 13,
		ESCAPE: 27,
		HOME: 36,
		INSERT: 45,
		LEFT: 37,
		NUMPAD_ADD: 107,
		NUMPAD_DECIMAL: 110,
		NUMPAD_DIVIDE: 111,
		NUMPAD_ENTER: 108,
		NUMPAD_MULTIPLY: 106,
		NUMPAD_SUBTRACT: 109,
		PAGE_DOWN: 34,
		PAGE_UP: 33,
		PERIOD: 190,
		RIGHT: 39,
		SHIFT: 16,
		SPACE: 32,
		TAB: 9,
		UP: 38
	}
};

// WAI-ARIA normalization
if (isFF2) {
	var attr = $.attr,
		removeAttr = $.fn.removeAttr,
		ariaNS = "http://www.w3.org/2005/07/aaa",
		ariaState = /^aria-/,
		ariaRole = /^wairole:/;

	$.attr = function(elem, name, value) {
		var set = value !== undefined;

		return (name == 'role'
			? (set
				? attr.call(this, elem, name, "wairole:" + value)
				: (attr.apply(this, arguments) || "").replace(ariaRole, ""))
			: (ariaState.test(name)
				? (set
					? elem.setAttributeNS(ariaNS,
						name.replace(ariaState, "aaa:"), value)
					: attr.call(this, elem, name.replace(ariaState, "aaa:")))
				: attr.apply(this, arguments)));
	};

	$.fn.removeAttr = function(name) {
		return (ariaState.test(name)
			? this.each(function() {
				this.removeAttributeNS(ariaNS, name.replace(ariaState, ""));
			}) : removeAttr.call(this, name));
	};
}

//jQuery plugins
$.fn.extend({
	_focus: $.fn.focus,
	focus: function(delay, fn) {
		return typeof delay === 'number'
			? this.each(function() {
				var elem = this;
				setTimeout(function() {
					$(elem).focus();
					(fn && fn.call(elem));
				}, delay);
			})
			: this._focus.apply(this, arguments);
	},
	
	remove: function() {
		// Safari has a native remove event which actually removes DOM elements,
		// so we have to use triggerHandler instead of trigger (#3037).
		$("*", this).add(this).each(function() {
			$(this).triggerHandler("remove");
		});
		return _remove.apply(this, arguments );
	},

	enableSelection: function() {
		return this
			.attr('unselectable', 'off')
			.css('MozUserSelect', '')
			.unbind('selectstart.ui');
	},

	disableSelection: function() {
		return this
			.attr('unselectable', 'on')
			.css('MozUserSelect', 'none')
			.bind('selectstart.ui', function() { return false; });
	},

	scrollParent: function() {
		var scrollParent;
		if(($.browser.msie && (/(static|relative)/).test(this.css('position'))) || (/absolute/).test(this.css('position'))) {
			scrollParent = this.parents().filter(function() {
				return (/(relative|absolute|fixed)/).test($.curCSS(this,'position',1)) && (/(auto|scroll)/).test($.curCSS(this,'overflow',1)+$.curCSS(this,'overflow-y',1)+$.curCSS(this,'overflow-x',1));
			}).eq(0);
		} else {
			scrollParent = this.parents().filter(function() {
				return (/(auto|scroll)/).test($.curCSS(this,'overflow',1)+$.curCSS(this,'overflow-y',1)+$.curCSS(this,'overflow-x',1));
			}).eq(0);
		}

		return (/fixed/).test(this.css('position')) || !scrollParent.length ? $(document) : scrollParent;
	},

	zIndex: function(zIndex) {
		if (zIndex !== undefined) {
			return this.css('zIndex', zIndex);
		}

		var elem = this[0];
		while (elem && elem.style) {
			// IE returns 0 when zIndex is not specified
			// other browsers return an empty string
			// we ignore the case of nested elements with an explicit value of 0
			// <div style="z-index: -10;"><div style="z-index: 0;"></div></div>
			if (elem.style.zIndex !== '' && elem.style.zIndex !== 0) {
				return +elem.style.zIndex;
			}
			elem = elem.parentNode;
		}

		return 0;
	}
});


//Additional selectors
$.extend($.expr[':'], {
	data: function(elem, i, match) {
		return !!$.data(elem, match[3]);
	},

	focusable: function(element) {
		var nodeName = element.nodeName.toLowerCase(),
			tabIndex = $.attr(element, 'tabindex');
		return (/input|select|textarea|button|object/.test(nodeName)
			? !element.disabled
			: 'a' == nodeName || 'area' == nodeName
				? element.href || !isNaN(tabIndex)
				: !isNaN(tabIndex))
			// the element and all of its ancestors must be visible
			// the browser may report that the area is hidden
			&& !$(element)['area' == nodeName ? 'parents' : 'closest'](':hidden').length;
	},

	tabbable: function(element) {
		var tabIndex = $.attr(element, 'tabindex');
		return (isNaN(tabIndex) || tabIndex >= 0) && $(element).is(':focusable');
	}
});


// $.widget is a factory to create jQuery plugins
// taking some boilerplate code out of the plugin code
$.widget = function(name, prototype) {
	var namespace = name.split(".")[0],
		fullName;
	name = name.split(".")[1];
	fullName = namespace + '-' + name;

	// create selector for plugin
	$.expr[':'][fullName] = function(elem) {
		return !!$.data(elem, name);
	};
	
	// create plugin method
	$.fn[name] = function(options) {
		var isMethodCall = (typeof options == 'string'),
			args = Array.prototype.slice.call(arguments, 1),
			returnValue = this;

		// allow multiple hashes to be passed on init
		options = !isMethodCall && args.length
			? $.extend.apply(null, [true, options].concat(args))
			: options;

		// prevent calls to internal methods
		if (isMethodCall && options.substring(0, 1) == '_') {
			return returnValue;
		}

		(isMethodCall
			? this.each(function() {
				var instance = $.data(this, name),
					methodValue = (instance && $.isFunction(instance[options])
						? instance[options].apply(instance, args)
						: instance);
				if (methodValue !== instance && methodValue !== undefined) {
					returnValue = methodValue;
					return false;
				}
			})
			: this.each(function() {
				($.data(this, name) ||
					$.data(this, name, new $[namespace][name](this, options))._init());
			}));

		return returnValue;
	};

	// create widget constructor
	$[namespace] = $[namespace] || {};
	$[namespace][name] = function(element, options) {
		var self = this;

		this.namespace = namespace;
		this.widgetName = name;
		this.widgetEventPrefix = $[namespace][name].eventPrefix || name;
		this.widgetBaseClass = fullName;

		this.options = $.extend(true, {},
			$.widget.defaults,
			$[namespace][name].defaults,
			$.metadata && $.metadata.get(element)[name],
			options);

		this.element = $(element)
			.bind('setData.' + name, function(event, key, value) {
				if (event.target == element) {
					return self._setData(key, value);
				}
			})
			.bind('getData.' + name, function(event, key) {
				if (event.target == element) {
					return self._getData(key);
				}
			})
			.bind('remove', function() {
				return self.destroy();
			});
	};

	// add widget prototype
	$[namespace][name].prototype = $.extend({}, $.widget.prototype, prototype);
};

$.widget.prototype = {
	_init: function() {},
	destroy: function() {
		this.element.removeData(this.widgetName)
			.removeClass(this.widgetBaseClass + '-disabled' + ' ' + this.namespace + '-state-disabled')
			.removeAttr('aria-disabled');

		return this;
	},

	option: function(key, value) {
		var options = key,
			self = this;

		if (typeof key == "string") {
			if (value === undefined) {
				return this._getData(key);
			}
			options = {};
			options[key] = value;
		}

		$.each(options, function(key, value) {
			self._setData(key, value);
		});

		return self;
	},
	_getData: function(key) {
		return this.options[key];
	},
	_setData: function(key, value) {
		this.options[key] = value;

		if (key == 'disabled') {
			this.element
				[value ? 'addClass' : 'removeClass'](
					this.widgetBaseClass + '-disabled' + ' ' +
					this.namespace + '-state-disabled')
				.attr("aria-disabled", value);
		}
	},

	enable: function() {
		this._setData('disabled', false);
		return this;
	},
	disable: function() {
		this._setData('disabled', true);
		return this;
	},

	_trigger: function(type, event, data) {
		var callback = this.options[type];

		event = $.Event(event);
		event.type = (type == this.widgetEventPrefix
				? type : this.widgetEventPrefix + type).toLowerCase();
		data = data || {};

		// copy original event properties over to the new event
		// this would happen if we could call $.event.fix instead of $.Event
		// but we don't have a way to force an event to be fixed multiple times
		if (event.originalEvent) {
			for (var i = $.event.props.length, prop; i;) {
				prop = $.event.props[--i];
				event[prop] = event.originalEvent[prop];
			}
		}

		this.element.trigger(event, data);

		return !($.isFunction(callback) && callback.call(this.element[0], event, data) === false
			|| event.isDefaultPrevented());
	}
};

$.widget.defaults = {
	disabled: false
};


/** Mouse Interaction Plugin **/

$.ui.mouse = {
	_mouseInit: function() {
		var self = this;

		this.element
			.bind('mousedown.'+this.widgetName, function(event) {
				return self._mouseDown(event);
			})
			.bind('click.'+this.widgetName, function(event) {
				if(self._preventClickEvent) {
					self._preventClickEvent = false;
					event.stopImmediatePropagation();
					return false;
				}
			});

		// Prevent text selection in IE
		if ($.browser.msie) {
			this._mouseUnselectable = this.element.attr('unselectable');
			this.element.attr('unselectable', 'on');
		}

		this.started = false;
	},

	// TODO: make sure destroying one instance of mouse doesn't mess with
	// other instances of mouse
	_mouseDestroy: function() {
		this.element.unbind('.'+this.widgetName);

		// Restore text selection in IE
		($.browser.msie
			&& this.element.attr('unselectable', this._mouseUnselectable));
	},

	_mouseDown: function(event) {
		// don't let more than one widget handle mouseStart
		// TODO: figure out why we have to use originalEvent
		event.originalEvent = event.originalEvent || {};
		if (event.originalEvent.mouseHandled) { return; }

		// we may have missed mouseup (out of window)
		(this._mouseStarted && this._mouseUp(event));

		this._mouseDownEvent = event;

		var self = this,
			btnIsLeft = (event.which == 1),
			elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
		if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
			return true;
		}

		this.mouseDelayMet = !this.options.delay;
		if (!this.mouseDelayMet) {
			this._mouseDelayTimer = setTimeout(function() {
				self.mouseDelayMet = true;
			}, this.options.delay);
		}

		if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
			this._mouseStarted = (this._mouseStart(event) !== false);
			if (!this._mouseStarted) {
				event.preventDefault();
				return true;
			}
		}

		// these delegates are required to keep context
		this._mouseMoveDelegate = function(event) {
			return self._mouseMove(event);
		};
		this._mouseUpDelegate = function(event) {
			return self._mouseUp(event);
		};
		$(document)
			.bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
			.bind('mouseup.'+this.widgetName, this._mouseUpDelegate);

		// preventDefault() is used to prevent the selection of text here -
		// however, in Safari, this causes select boxes not to be selectable
		// anymore, so this fix is needed
		($.browser.safari || event.preventDefault());

		event.originalEvent.mouseHandled = true;
		return true;
	},

	_mouseMove: function(event) {
		// IE mouseup check - mouseup happened when mouse was out of window
		if ($.browser.msie && !event.button) {
			return this._mouseUp(event);
		}

		if (this._mouseStarted) {
			this._mouseDrag(event);
			return event.preventDefault();
		}

		if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
			this._mouseStarted =
				(this._mouseStart(this._mouseDownEvent, event) !== false);
			(this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
		}

		return !this._mouseStarted;
	},

	_mouseUp: function(event) {
		$(document)
			.unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
			.unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);

		if (this._mouseStarted) {
			this._mouseStarted = false;
			this._preventClickEvent = (event.target == this._mouseDownEvent.target);
			this._mouseStop(event);
		}

		return false;
	},

	_mouseDistanceMet: function(event) {
		return (Math.max(
				Math.abs(this._mouseDownEvent.pageX - event.pageX),
				Math.abs(this._mouseDownEvent.pageY - event.pageY)
			) >= this.options.distance
		);
	},

	_mouseDelayMet: function(event) {
		return this.mouseDelayMet;
	},

	// These are placeholder methods, to be overriden by extending plugin
	_mouseStart: function(event) {},
	_mouseDrag: function(event) {},
	_mouseStop: function(event) {},
	_mouseCapture: function(event) { return true; }
};

$.ui.mouse.defaults = {
	cancel: ':input,option',
	distance: 1,
	delay: 0
};

})(jQuery);