3 Copyright 2012 Yahoo! Inc. All rights reserved.
4 Licensed under the BSD License.
5 http://yuilibrary.com/license/
7 YUI.add('widget-modality', function(Y) {
10 * Provides modality support for Widgets, though an extension
12 * @module widget-modality
15 var WIDGET = 'widget',
16 RENDER_UI = 'renderUI',
19 BOUNDING_BOX = 'boundingBox',
20 CONTENT_BOX = 'contentBox',
24 isBoolean = Y.Lang.isBoolean,
25 getCN = Y.ClassNameManager.getClassName,
26 MaskShow = "maskShow",
27 MaskHide = "maskHide",
28 ClickOutside = "clickoutside",
29 FocusOutside = "focusoutside",
31 supportsPosFixed = (function(){
33 /*! IS_POSITION_FIXED_SUPPORTED - Juriy Zaytsev (kangax) - http://yura.thinkweb2.com/cft/ */
35 var doc = Y.config.doc,
39 if (doc.createElement) {
40 el = doc.createElement('div');
42 el.style.position = 'fixed';
43 el.style.top = '10px';
45 if (root && root.appendChild && root.removeChild) {
47 isSupported = (el.offsetTop === 10);
57 * Widget extension, which can be used to add modality support to the base Widget class,
58 * through the Base.create method.
60 * @class WidgetModality
61 * @param {Object} config User configuration object
63 function WidgetModal(config) {}
68 modal : getCN(WIDGET, MODAL),
69 mask : getCN(WIDGET, MASK)
73 * Static property used to define the default attribute
74 * configuration introduced by WidgetModality.
85 * @description Returns a Y.Node instance of the node being used as the mask.
88 getter : '_getMaskNode',
97 * @description Whether the widget should be modal or not.
108 * @description An array of objects corresponding to the nodes and events that will trigger a re-focus back on the widget.
109 * The implementer can supply an array of objects, with each object having the following properties:
110 * <p>eventName: (string, required): The eventName to listen to.</p>
111 * <p>node: (Y.Node, optional): The Y.Node that will fire the event (defaults to the boundingBox of the widget)</p>
112 * <p>By default, this attribute consists of two objects which will cause the widget to re-focus if anything
113 * outside the widget is clicked on or focussed upon.</p>
116 valueFn: function() {
119 // node: this.get(BOUNDING_BOX),
120 eventName: ClickOutside
123 //node: this.get(BOUNDING_BOX),
124 eventName: FocusOutside
129 validator: Y.Lang.isArray
135 WidgetModal.CLASSES = MODAL_CLASSES;
139 * Returns the mask if it exists on the page - otherwise creates a mask. There's only
140 * one mask on a page at a given time.
142 * This method in invoked internally by the getter of the maskNode ATTR.
147 WidgetModal._GET_MASK = function() {
149 var mask = Y.one(".yui3-widget-mask") || null,
150 win = Y.one('window');
157 mask = Y.Node.create('<div></div>');
158 mask.addClass(MODAL_CLASSES.mask);
159 if (supportsPosFixed) {
171 position : 'absolute',
172 width : win.get('winWidth') +'px',
173 height : win.get('winHeight') + 'px',
188 * A stack of Y.Widget objects representing the current hierarchy of modal widgets presently displayed on the screen
191 WidgetModal.STACK = [];
194 WidgetModal.prototype = {
196 initializer: function () {
197 Y.after(this._renderUIModal, this, RENDER_UI);
198 Y.after(this._syncUIModal, this, SYNC_UI);
199 Y.after(this._bindUIModal, this, BIND_UI);
202 destructor: function () {
203 // Hack to remove this thing from the STACK.
204 this._uiSetHostVisibleModal(false);
207 // *** Instance Members *** //
209 _uiHandlesModal: null,
213 * Adds modal class to the bounding box of the widget
215 * This method in invoked after renderUI is invoked for the Widget class
216 * using YUI's aop infrastructure.
218 * @method _renderUIModal
221 _renderUIModal : function () {
223 var bb = this.get(BOUNDING_BOX);
224 //cb = this.get(CONTENT_BOX);
226 //this makes the content box content appear over the mask
231 this._repositionMask(this);
232 bb.addClass(MODAL_CLASSES.modal);
238 * Hooks up methods to be executed when the widget's visibility or z-index changes
240 * This method in invoked after bindUI is invoked for the Widget class
241 * using YUI's aop infrastructure.
243 * @method _bindUIModal
246 _bindUIModal : function () {
248 this.after(VISIBLE+CHANGE, this._afterHostVisibleChangeModal);
249 this.after(Z_INDEX+CHANGE, this._afterHostZIndexChangeModal);
250 this.after("focusOnChange", this._afterFocusOnChange);
252 // Re-align the mask in the viewport if `position: fixed;` is not
253 // supported. iOS < 5 and Android < 3 don't actually support it even
254 // though they both pass the feature test; the UA sniff is here to
255 // account for that. Ideally this should be replaced with a better
257 if (!supportsPosFixed ||
258 (Y.UA.ios && Y.UA.ios < 5) ||
259 (Y.UA.android && Y.UA.android < 3)) {
261 Y.one('win').on('scroll', this._resyncMask, this);
266 * Syncs the mask with the widget's current state, namely the visibility and z-index of the widget
268 * This method in invoked after syncUI is invoked for the Widget class
269 * using YUI's aop infrastructure.
271 * @method _syncUIModal
274 _syncUIModal : function () {
276 //var host = this.get(HOST);
278 this._uiSetHostVisibleModal(this.get(VISIBLE));
279 this._uiSetHostZIndexModal(this.get(Z_INDEX));
284 * Provides mouse and tab focus to the widget's bounding box.
288 _focus : function (e) {
290 var bb = this.get(BOUNDING_BOX),
291 oldTI = bb.get('tabIndex');
293 bb.set('tabIndex', oldTI >= 0 ? oldTI : 0);
301 _blur : function () {
307 * Returns the Y.Node instance of the maskNode
309 * @method _getMaskNode
310 * @return {Node} The Y.Node instance of the mask, as returned from WidgetModal._GET_MASK
312 _getMaskNode : function () {
314 return WidgetModal._GET_MASK();
318 * Performs events attaching/detaching, stack shifting and mask repositioning based on the visibility of the widget
320 * @method _uiSetHostVisibleModal
321 * @param {boolean} Whether the widget is visible or not
323 _uiSetHostVisibleModal : function (visible) {
324 var stack = WidgetModal.STACK,
325 maskNode = this.get('maskNode'),
326 isModal = this.get('modal'),
331 Y.Array.each(stack, function(modal){
332 modal._detachUIHandlesModal();
336 // push on top of stack
339 this._repositionMask(this);
340 this._uiSetHostZIndexModal(this.get(Z_INDEX));
344 Y.later(1, this, '_attachUIHandlesModal');
351 index = Y.Array.indexOf(stack, this);
353 // Remove modal widget from global stack.
354 stack.splice(index, 1);
357 this._detachUIHandlesModal();
362 this._repositionMask(topModal);
363 //topModal._attachUIHandlesModal();
364 topModal._uiSetHostZIndexModal(topModal.get(Z_INDEX));
366 if (topModal.get('modal')) {
367 //topModal._attachUIHandlesModal();
368 Y.later(1, topModal, '_attachUIHandlesModal');
374 if (maskNode.getStyle('display') === 'block') {
384 * Sets the z-index of the mask node.
386 * @method _uiSetHostZIndexModal
387 * @param {Number} Z-Index of the widget
389 _uiSetHostZIndexModal : function (zIndex) {
391 if (this.get('modal')) {
392 this.get('maskNode').setStyle(Z_INDEX, zIndex || 0);
398 * Attaches UI Listeners for "clickoutside" and "focusoutside" on the
399 * widget. When these events occur, and the widget is modal, focus is
400 * shifted back onto the widget.
402 * @method _attachUIHandlesModal
404 _attachUIHandlesModal : function () {
406 if (this._uiHandlesModal || WidgetModal.STACK[0] !== this) {
407 // Quit early if we have ui handles, or if we not at the top
408 // of the global stack.
412 var bb = this.get(BOUNDING_BOX),
413 maskNode = this.get('maskNode'),
414 focusOn = this.get('focusOn'),
415 focus = Y.bind(this._focus, this),
419 for (i = 0, len = focusOn.length; i < len; i++) {
422 o.node = focusOn[i].node;
423 o.ev = focusOn[i].eventName;
424 o.keyCode = focusOn[i].keyCode;
426 //no keycode or node defined
427 if (!o.node && !o.keyCode && o.ev) {
428 uiHandles.push(bb.on(o.ev, focus));
431 //node defined, no keycode (not a keypress)
432 else if (o.node && !o.keyCode && o.ev) {
433 uiHandles.push(o.node.on(o.ev, focus));
436 //node defined, keycode defined, event defined (its a key press)
437 else if (o.node && o.keyCode && o.ev) {
438 uiHandles.push(o.node.on(o.ev, focus, o.keyCode));
442 Y.Log('focusOn ATTR Error: The event with name "'+o.ev+'" could not be attached.');
447 if ( ! supportsPosFixed) {
448 uiHandles.push(Y.one('win').on('scroll', Y.bind(function(e){
449 maskNode.setStyle('top', maskNode.get('docScrollY'));
453 this._uiHandlesModal = uiHandles;
457 * Detaches all UI Listeners that were set in _attachUIHandlesModal from the widget.
459 * @method _detachUIHandlesModal
461 _detachUIHandlesModal : function () {
462 Y.each(this._uiHandlesModal, function(h){
465 this._uiHandlesModal = null;
469 * Default function that is called when visibility is changed on the widget.
471 * @method _afterHostVisibleChangeModal
472 * @param {EventFacade} e The event facade of the change
474 _afterHostVisibleChangeModal : function (e) {
476 this._uiSetHostVisibleModal(e.newVal);
480 * Default function that is called when z-index is changed on the widget.
482 * @method _afterHostZIndexChangeModal
483 * @param {EventFacade} e The event facade of the change
485 _afterHostZIndexChangeModal : function (e) {
487 this._uiSetHostZIndexModal(e.newVal);
491 * Returns a boolean representing whether the current widget is in a "nested modality" state.
492 * This is done by checking the number of widgets currently on the stack.
497 isNested: function() {
498 var length = WidgetModal.STACK.length,
499 retval = (length > 1) ? true : false;
504 * Repositions the mask in the DOM for nested modality cases.
506 * @method _repositionMask
507 * @param {Widget} nextElem The Y.Widget instance that will be visible in the stack once the current widget is closed.
509 _repositionMask: function(nextElem) {
511 var currentModal = this.get('modal'),
512 nextModal = nextElem.get('modal'),
513 maskNode = this.get('maskNode'),
516 //if this is modal and host is not modal
517 if (currentModal && !nextModal) {
518 //leave the mask where it is, since the host is not modal.
523 //if the main widget is not modal but the host is modal, or both of them are modal
524 else if ((!currentModal && nextModal) || (currentModal && nextModal)) {
526 //then remove the mask off DOM, reposition it, and reinsert it into the DOM
529 bb = nextElem.get(BOUNDING_BOX);
530 bbParent = bb.get('parentNode') || Y.one('body');
531 bbParent.insert(maskNode, bbParent.get('firstChild'));
538 * Resyncs the mask in the viewport for browsers that don't support fixed positioning
540 * @method _resyncMask
541 * @param {Y.Widget} nextElem The Y.Widget instance that will be visible in the stack once the current widget is closed.
544 _resyncMask: function (e) {
545 var o = e.currentTarget,
546 offsetX = o.get('docScrollX'),
547 offsetY = o.get('docScrollY'),
548 w = o.get('innerWidth') || o.get('winWidth'),
549 h = o.get('innerHeight') || o.get('winHeight'),
550 mask = this.get('maskNode');
553 "top": offsetY + "px",
554 "left": offsetX + "px",
561 * Default function called when focusOn Attribute is changed. Remove existing listeners and create new listeners.
563 * @method _afterFocusOnChange
565 _afterFocusOnChange : function(e) {
566 this._detachUIHandlesModal();
568 if (this.get(VISIBLE)) {
569 this._attachUIHandlesModal();
574 Y.WidgetModality = WidgetModal;
578 }, '3.5.1' ,{requires:['base-build', 'event-outside', 'widget'], skinnable:true});