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/**
* EventUtils.js
*
* Copyright, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/*jshint loopfunc:true*/
/*eslint no-loop-func:0 */
/**
* This class wraps the browsers native event logic with more convenient methods.
*
* @class tinymce.dom.EventUtils
*/
define("tinymce/dom/EventUtils", [], function() {
"use strict";
var eventExpandoPrefix = "mce-data-";
var mouseEventRe = /^(?:mouse|contextmenu)|click/;
var deprecated = {keyLocation: 1, layerX: 1, layerY: 1, returnValue: 1};
/**
* Binds a native event to a callback on the speified target.
*/
function addEvent(target, name, callback, capture) {
if (target.addEventListener) {
target.addEventListener(name, callback, capture || false);
} else if (target.attachEvent) {
target.attachEvent('on' + name, callback);
}
}
/**
* Unbinds a native event callback on the specified target.
*/
function removeEvent(target, name, callback, capture) {
if (target.removeEventListener) {
target.removeEventListener(name, callback, capture || false);
} else if (target.detachEvent) {
target.detachEvent('on' + name, callback);
}
}
/**
* Normalizes a native event object or just adds the event specific methods on a custom event.
*/
function fix(originalEvent, data) {
var name, event = data || {}, undef;
// Dummy function that gets replaced on the delegation state functions
function returnFalse() {
return false;
}
// Dummy function that gets replaced on the delegation state functions
function returnTrue() {
return true;
}
// Copy all properties from the original event
for (name in originalEvent) {
// layerX/layerY is deprecated in Chrome and produces a warning
if (!deprecated[name]) {
event[name] = originalEvent[name];
}
}
// Normalize target IE uses srcElement
if (!event.target) {
event.target = event.srcElement || document;
}
// Calculate pageX/Y if missing and clientX/Y available
if (originalEvent && mouseEventRe.test(originalEvent.type) && originalEvent.pageX === undef && originalEvent.clientX !== undef) {
var eventDoc = event.target.ownerDocument || document;
var doc = eventDoc.documentElement;
var body = eventDoc.body;
event.pageX = originalEvent.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) -
(doc && doc.clientLeft || body && body.clientLeft || 0);
event.pageY = originalEvent.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) -
(doc && doc.clientTop || body && body.clientTop || 0);
}
// Add preventDefault method
event.preventDefault = function() {
event.isDefaultPrevented = returnTrue;
// Execute preventDefault on the original event object
if (originalEvent) {
if (originalEvent.preventDefault) {
originalEvent.preventDefault();
} else {
originalEvent.returnValue = false; // IE
}
}
};
// Add stopPropagation
event.stopPropagation = function() {
event.isPropagationStopped = returnTrue;
// Execute stopPropagation on the original event object
if (originalEvent) {
if (originalEvent.stopPropagation) {
originalEvent.stopPropagation();
} else {
originalEvent.cancelBubble = true; // IE
}
}
};
// Add stopImmediatePropagation
event.stopImmediatePropagation = function() {
event.isImmediatePropagationStopped = returnTrue;
event.stopPropagation();
};
// Add event delegation states
if (!event.isDefaultPrevented) {
event.isDefaultPrevented = returnFalse;
event.isPropagationStopped = returnFalse;
event.isImmediatePropagationStopped = returnFalse;
}
return event;
}
/**
* Bind a DOMContentLoaded event across browsers and executes the callback once the page DOM is initialized.
* It will also set/check the domLoaded state of the event_utils instance so ready isn't called multiple times.
*/
function bindOnReady(win, callback, eventUtils) {
var doc = win.document, event = {type: 'ready'};
if (eventUtils.domLoaded) {
callback(event);
return;
}
// Gets called when the DOM is ready
function readyHandler() {
if (!eventUtils.domLoaded) {
eventUtils.domLoaded = true;
callback(event);
}
}
function waitForDomLoaded() {
// Check complete or interactive state if there is a body
// element on some iframes IE 8 will produce a null body
if (doc.readyState === "complete" || (doc.readyState === "interactive" && doc.body)) {
removeEvent(doc, "readystatechange", waitForDomLoaded);
readyHandler();
}
}
function tryScroll() {
try {
// If IE is used, use the trick by Diego Perini licensed under MIT by request to the author.
// http://javascript.nwbox.com/IEContentLoaded/
doc.documentElement.doScroll("left");
} catch (ex) {
setTimeout(tryScroll, 0);
return;
}
readyHandler();
}
// Use W3C method
if (doc.addEventListener) {
if (doc.readyState === "complete") {
readyHandler();
} else {
addEvent(win, 'DOMContentLoaded', readyHandler);
}
} else {
// Use IE method
addEvent(doc, "readystatechange", waitForDomLoaded);
// Wait until we can scroll, when we can the DOM is initialized
if (doc.documentElement.doScroll && win.self === win.top) {
tryScroll();
}
}
// Fallback if any of the above methods should fail for some odd reason
addEvent(win, 'load', readyHandler);
}
/**
* This class enables you to bind/unbind native events to elements and normalize it's behavior across browsers.
*/
function EventUtils() {
var self = this, events = {}, count, expando, hasFocusIn, hasMouseEnterLeave, mouseEnterLeave;
expando = eventExpandoPrefix + (+new Date()).toString(32);
hasMouseEnterLeave = "onmouseenter" in document.documentElement;
hasFocusIn = "onfocusin" in document.documentElement;
mouseEnterLeave = {mouseenter: 'mouseover', mouseleave: 'mouseout'};
count = 1;
// State if the DOMContentLoaded was executed or not
self.domLoaded = false;
self.events = events;
/**
* Executes all event handler callbacks for a specific event.
*
* @private
* @param {Event} evt Event object.
* @param {String} id Expando id value to look for.
*/
function executeHandlers(evt, id) {
var callbackList, i, l, callback, container = events[id];
callbackList = container && container[evt.type];
if (callbackList) {
for (i = 0, l = callbackList.length; i < l; i++) {
callback = callbackList[i];
// Check if callback exists might be removed if a unbind is called inside the callback
if (callback && callback.func.call(callback.scope, evt) === false) {
evt.preventDefault();
}
// Should we stop propagation to immediate listeners
if (evt.isImmediatePropagationStopped()) {
return;
}
}
}
}
/**
* Binds a callback to an event on the specified target.
*
* @method bind
* @param {Object} target Target node/window or custom object.
* @param {String} names Name of the event to bind.
* @param {function} callback Callback function to execute when the event occurs.
* @param {Object} scope Scope to call the callback function on, defaults to target.
* @return {function} Callback function that got bound.
*/
self.bind = function(target, names, callback, scope) {
var id, callbackList, i, name, fakeName, nativeHandler, capture, win = window;
// Native event handler function patches the event and executes the callbacks for the expando
function defaultNativeHandler(evt) {
executeHandlers(fix(evt || win.event), id);
}
// Don't bind to text nodes or comments
if (!target || target.nodeType === 3 || target.nodeType === 8) {
return;
}
// Create or get events id for the target
if (!target[expando]) {
id = count++;
target[expando] = id;
events[id] = {};
} else {
id = target[expando];
}
// Setup the specified scope or use the target as a default
scope = scope || target;
// Split names and bind each event, enables you to bind multiple events with one call
names = names.split(' ');
i = names.length;
while (i--) {
name = names[i];
nativeHandler = defaultNativeHandler;
fakeName = capture = false;
// Use ready instead of DOMContentLoaded
if (name === "DOMContentLoaded") {
name = "ready";
}
// DOM is already ready
if (self.domLoaded && name === "ready" && target.readyState == 'complete') {
callback.call(scope, fix({type: name}));
continue;
}
// Handle mouseenter/mouseleaver
if (!hasMouseEnterLeave) {
fakeName = mouseEnterLeave[name];
if (fakeName) {
nativeHandler = function(evt) {
var current, related;
current = evt.currentTarget;
related = evt.relatedTarget;
// Check if related is inside the current target if it's not then the event should
// be ignored since it's a mouseover/mouseout inside the element
if (related && current.contains) {
// Use contains for performance
related = current.contains(related);
} else {
while (related && related !== current) {
related = related.parentNode;
}
}
// Fire fake event
if (!related) {
evt = fix(evt || win.event);
evt.type = evt.type === 'mouseout' ? 'mouseleave' : 'mouseenter';
evt.target = current;
executeHandlers(evt, id);
}
};
}
}
// Fake bubbeling of focusin/focusout
if (!hasFocusIn && (name === "focusin" || name === "focusout")) {
capture = true;
fakeName = name === "focusin" ? "focus" : "blur";
nativeHandler = function(evt) {
evt = fix(evt || win.event);
evt.type = evt.type === 'focus' ? 'focusin' : 'focusout';
executeHandlers(evt, id);
};
}
// Setup callback list and bind native event
callbackList = events[id][name];
if (!callbackList) {
events[id][name] = callbackList = [{func: callback, scope: scope}];
callbackList.fakeName = fakeName;
callbackList.capture = capture;
//callbackList.callback = callback;
// Add the nativeHandler to the callback list so that we can later unbind it
callbackList.nativeHandler = nativeHandler;
// Check if the target has native events support
if (name === "ready") {
bindOnReady(target, nativeHandler, self);
} else {
addEvent(target, fakeName || name, nativeHandler, capture);
}
} else {
if (name === "ready" && self.domLoaded) {
callback({type: name});
} else {
// If it already has an native handler then just push the callback
callbackList.push({func: callback, scope: scope});
}
}
}
target = callbackList = 0; // Clean memory for IE
return callback;
};
/**
* Unbinds the specified event by name, name and callback or all events on the target.
*
* @method unbind
* @param {Object} target Target node/window or custom object.
* @param {String} names Optional event name to unbind.
* @param {function} callback Optional callback function to unbind.
* @return {EventUtils} Event utils instance.
*/
self.unbind = function(target, names, callback) {
var id, callbackList, i, ci, name, eventMap;
// Don't bind to text nodes or comments
if (!target || target.nodeType === 3 || target.nodeType === 8) {
return self;
}
// Unbind event or events if the target has the expando
id = target[expando];
if (id) {
eventMap = events[id];
// Specific callback
if (names) {
names = names.split(' ');
i = names.length;
while (i--) {
name = names[i];
callbackList = eventMap[name];
// Unbind the event if it exists in the map
if (callbackList) {
// Remove specified callback
if (callback) {
ci = callbackList.length;
while (ci--) {
if (callbackList[ci].func === callback) {
var nativeHandler = callbackList.nativeHandler;
var fakeName = callbackList.fakeName, capture = callbackList.capture;
// Clone callbackList since unbind inside a callback would otherwise break the handlers loop
callbackList = callbackList.slice(0, ci).concat(callbackList.slice(ci + 1));
callbackList.nativeHandler = nativeHandler;
callbackList.fakeName = fakeName;
callbackList.capture = capture;
eventMap[name] = callbackList;
}
}
}
// Remove all callbacks if there isn't a specified callback or there is no callbacks left
if (!callback || callbackList.length === 0) {
delete eventMap[name];
removeEvent(target, callbackList.fakeName || name, callbackList.nativeHandler, callbackList.capture);
}
}
}
} else {
// All events for a specific element
for (name in eventMap) {
callbackList = eventMap[name];
removeEvent(target, callbackList.fakeName || name, callbackList.nativeHandler, callbackList.capture);
}
eventMap = {};
}
// Check if object is empty, if it isn't then we won't remove the expando map
for (name in eventMap) {
return self;
}
// Delete event object
delete events[id];
// Remove expando from target
try {
// IE will fail here since it can't delete properties from window
delete target[expando];
} catch (ex) {
// IE will set it to null
target[expando] = null;
}
}
return self;
};
/**
* Fires the specified event on the specified target.
*
* @method fire
* @param {Object} target Target node/window or custom object.
* @param {String} name Event name to fire.
* @param {Object} args Optional arguments to send to the observers.
* @return {EventUtils} Event utils instance.
*/
self.fire = function(target, name, args) {
var id;
// Don't bind to text nodes or comments
if (!target || target.nodeType === 3 || target.nodeType === 8) {
return self;
}
// Build event object by patching the args
args = fix(null, args);
args.type = name;
args.target = target;
do {
// Found an expando that means there is listeners to execute
id = target[expando];
if (id) {
executeHandlers(args, id);
}
// Walk up the DOM
target = target.parentNode || target.ownerDocument || target.defaultView || target.parentWindow;
} while (target && !args.isPropagationStopped());
return self;
};
/**
* Removes all bound event listeners for the specified target. This will also remove any bound
* listeners to child nodes within that target.
*
* @method clean
* @param {Object} target Target node/window object.
* @return {EventUtils} Event utils instance.
*/
self.clean = function(target) {
var i, children, unbind = self.unbind;
// Don't bind to text nodes or comments
if (!target || target.nodeType === 3 || target.nodeType === 8) {
return self;
}
// Unbind any element on the specificed target
if (target[expando]) {
unbind(target);
}
// Target doesn't have getElementsByTagName it's probably a window object then use it's document to find the children
if (!target.getElementsByTagName) {
target = target.document;
}
// Remove events from each child element
if (target && target.getElementsByTagName) {
unbind(target);
children = target.getElementsByTagName('*');
i = children.length;
while (i--) {
target = children[i];
if (target[expando]) {
unbind(target);
}
}
}
return self;
};
/**
* Destroys the event object. Call this on IE to remove memory leaks.
*/
self.destroy = function() {
events = {};
};
// Legacy function for canceling events
self.cancel = function(e) {
if (e) {
e.preventDefault();
e.stopImmediatePropagation();
}
return false;
};
}
EventUtils.Event = new EventUtils();
EventUtils.Event.bind(window, 'ready', function() {});
return EventUtils;
});