UNPKG

64.1 kBJavaScriptView Raw
1(function(namespace) {
2
3 var isIE = /MSIE/i.test(navigator.userAgent),
4 ieVer = null;
5
6 // Get Internet Explorer version
7 if (isIE) {
8 var re, result;
9 re = new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})");
10 result = re.exec(navigator.userAgent);
11 if (result !== null) {
12 ieVer = parseFloat(result[1]);
13 }
14 }
15
16 /**
17 * FontLoader detects when web fonts specified in the "fontFamiliesArray" array were loaded and rendered. Then it
18 * notifies the specified delegate object via "fontLoaded" and "fontsLoaded" methods when specific or all fonts were
19 * loaded respectively. The use of this functions implies that the insertion of specified web fonts into the
20 * document is done elsewhere.
21 *
22 * If timeout (default 3000ms) is reached before all fonts were loaded and rendered, then "fontsLoaded" delegate
23 * method is invoked with an error object as its single parameter. The error object has two fields: the "message"
24 * field holding the error description and the "notLoadedFontFamilies" field holding an array with all the
25 * font-families that weren't loaded. Otherwise the parameter is null.
26 *
27 * @param {Array} fontFamiliesArray Array of font-family strings.
28 * @param {Object} delegate Delegate object whose delegate methods will be invoked in its own context.
29 * @param {Function} [delegate.fontsLoaded] Delegate method invoked after all fonts are loaded or timeout is reached.
30 * @param {Function} [delegate.fontLoaded] Delegate method invoked for each loaded font with its font-family string as its single parameter.
31 * @param {Number} [timeout=3000] Timeout in milliseconds. Pass "null" to disable timeout.
32 * @constructor
33 */
34 function FontLoader(fontFamiliesArray, delegate, timeout) {
35 // Public
36 this.delegate = delegate;
37 this.timeout = (typeof timeout !== "undefined") ? timeout : 3000;
38
39 // Private
40 this._fontFamiliesArray = fontFamiliesArray.slice(0);
41 this._testContainer = null;
42 this._adobeBlankSizeWatcher = null;
43 this._timeoutId = null;
44 this._intervalId = null;
45 this._intervalDelay = 50;
46 this._numberOfLoadedFonts = 0;
47 this._numberOfFontFamilies = this._fontFamiliesArray.length;
48 this._fontsMap = {};
49 this._finished = false;
50 }
51
52 namespace.FontLoader = FontLoader;
53
54 FontLoader.testDiv = null;
55 FontLoader.useAdobeBlank = !isIE || ieVer >= 11.0;
56 FontLoader.useResizeEvent = isIE && ieVer < 11.0 && typeof document.attachEvent !== "undefined";
57 FontLoader.useIntervalChecking = window.opera || (isIE && ieVer < 11.0 && !FontLoader.useResizeEvent);
58 FontLoader.referenceText = " !\"\\#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~";
59 FontLoader.referenceFontFamilies = FontLoader.useAdobeBlank ? ["AdobeBlank"] : ["serif", "cursive"];
60 FontLoader.referenceFontFamiliesSizes = [];
61 FontLoader.adobeBlankFontFaceRule = "@font-face{ font-family:AdobeBlank; src:url('data:font/opentype;base64,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format('truetype'); }";
62
63 FontLoader.prototype = {
64 constructor: FontLoader,
65 loadFonts: function() {
66 var self = this;
67
68 if (this._numberOfFontFamilies === 0) {
69 this._finish();
70 return;
71 }
72
73 if (this.timeout !== null) {
74 this._timeoutId = window.setTimeout(function timeoutFire() {
75 self._finish();
76 }, this.timeout);
77 }
78
79 // Use constant line-height so there won't be changes in height because Adobe Blank uses zero width but not zero height.
80 this._testContainer = document.createElement("div");
81 this._testContainer.style.cssText = "position:absolute; left:-10000px; top:-10000px; white-space:nowrap; font-size:20px; line-height:20px; visibility:hidden;";
82
83 if (FontLoader.testDiv === null) {
84 this._runOnce();
85 } else {
86 this._loadFonts();
87 }
88 },
89 _runOnce: function() {
90 var self = this,
91 clonedDiv, j,
92 adobeBlankFontFaceStyle, adobeBlankDiv,
93 adobeBlankFallbackFont = "serif";
94
95 // Create testFiv template that will be cloned for each font
96 FontLoader.testDiv = document.createElement("div");
97 FontLoader.testDiv.style.position = "absolute";
98 FontLoader.testDiv.appendChild(document.createTextNode(FontLoader.referenceText));
99
100 if (!FontLoader.useAdobeBlank) {
101 // Get default dimensions
102 clonedDiv = FontLoader.testDiv.cloneNode(true);
103 this._testContainer.appendChild(clonedDiv);
104 document.body.appendChild(this._testContainer);
105
106 for (j = 0; j < FontLoader.referenceFontFamilies.length; j++) {
107 clonedDiv.style.fontFamily = FontLoader.referenceFontFamilies[j];
108 FontLoader.referenceFontFamiliesSizes.push(new Size(clonedDiv.offsetWidth, clonedDiv.offsetHeight));
109 }
110
111 this._testContainer.parentNode.removeChild(this._testContainer);
112 clonedDiv.parentNode.removeChild(clonedDiv);
113 this._loadFonts();
114 } else {
115 // Add AdobeBlank @font-face
116 adobeBlankFontFaceStyle = document.createElement("style");
117 adobeBlankFontFaceStyle.setAttribute("type", "text/css");
118 adobeBlankFontFaceStyle.appendChild(document.createTextNode(FontLoader.adobeBlankFontFaceRule));
119 document.getElementsByTagName("head")[0].appendChild(adobeBlankFontFaceStyle);
120
121 // Get default dimensions
122 adobeBlankDiv = /** @type HTMLElement */FontLoader.testDiv.cloneNode(true);
123 this._testContainer.appendChild(adobeBlankDiv);
124 document.body.appendChild(this._testContainer);
125
126 adobeBlankDiv.style.fontFamily = adobeBlankFallbackFont;
127
128 if (FontLoader.useIntervalChecking) {
129 this._testContainer.appendChild(adobeBlankDiv);
130 // Start polling element sizes but also do first synchronous check in case all fonts where already loaded.
131 this._intervalId = window.setInterval(function intervalFire() {
132 self._checkAdobeBlankSize();
133 }, this._intervalDelay);
134 this._checkAdobeBlankSize();
135 } else {
136 this._adobeBlankSizeWatcher = new SizeWatcher(adobeBlankDiv, {
137 container: this._testContainer,
138 delegate: this,
139 continuous: true,
140 direction: SizeWatcher.directions.decrease,
141 dimension: SizeWatcher.dimensions.horizontal
142 });
143 this._adobeBlankSizeWatcher.prepareForWatch();
144 this._adobeBlankSizeWatcher.beginWatching();
145 }
146
147 adobeBlankDiv.style.fontFamily = FontLoader.referenceFontFamilies[0] + ", " + adobeBlankFallbackFont;
148 }
149 },
150 _checkAdobeBlankSize: function() {
151 var adobeBlankDiv = this._testContainer.firstChild;
152 this._adobeBlankLoaded(adobeBlankDiv);
153 },
154 _adobeBlankLoaded: function(adobeBlankDiv) {
155 // Prevent false size change, for example if AdobeBlank height is higher than fallback font.
156 if (adobeBlankDiv.offsetWidth !== 0) {
157 return;
158 }
159
160 FontLoader.referenceFontFamiliesSizes.push(new Size(adobeBlankDiv.offsetWidth, adobeBlankDiv.offsetHeight));
161
162 if (this._adobeBlankSizeWatcher !== null) {
163 // SizeWatcher method
164 this._adobeBlankSizeWatcher.endWatching();
165 this._adobeBlankSizeWatcher.removeScrollWatchers();
166 this._adobeBlankSizeWatcher = null;
167 } else {
168 // Polling method (IE)
169 window.clearInterval(this._intervalId);
170 adobeBlankDiv.parentNode.removeChild(adobeBlankDiv);
171 }
172
173 this._testContainer.parentNode.removeChild(this._testContainer);
174
175 this._loadFonts();
176 },
177 _loadFonts: function() {
178 var i, j, clonedDiv, sizeWatcher, sizeWatchers = [],
179 self = this;
180
181 // Add div for each font-family
182 for (i = 0; i < this._numberOfFontFamilies; i++) {
183 this._fontsMap[this._fontFamiliesArray[i]] = true;
184
185 if (FontLoader.useResizeEvent) {
186 for (j = 0; j < FontLoader.referenceFontFamilies.length; j++) {
187 clonedDiv = FontLoader.testDiv.cloneNode(true);
188 clonedDiv.setAttribute("data-font-family", this._fontFamiliesArray[i]);
189 clonedDiv.setAttribute("data-ref-font-family-index", String(j));
190 clonedDiv.style.fontFamily = FontLoader.referenceFontFamilies[j];
191 this._testContainer.appendChild(clonedDiv);
192 }
193 } else if (FontLoader.useIntervalChecking) {
194 for (j = 0; j < FontLoader.referenceFontFamilies.length; j++) {
195 clonedDiv = FontLoader.testDiv.cloneNode(true);
196 clonedDiv.setAttribute("data-font-family", this._fontFamiliesArray[i]);
197 clonedDiv.setAttribute("data-ref-font-family-index", String(j));
198 clonedDiv.style.fontFamily = "'" + this._fontFamiliesArray[i] + "', " + FontLoader.referenceFontFamilies[j];
199 this._testContainer.appendChild(clonedDiv);
200 }
201 } else {
202 for (j = 0; j < FontLoader.referenceFontFamilies.length; j++) {
203 clonedDiv = FontLoader.testDiv.cloneNode(true);
204 clonedDiv.setAttribute("data-font-family", this._fontFamiliesArray[i]);
205 clonedDiv.setAttribute("data-ref-font-family-index", String(j));
206 clonedDiv.style.fontFamily = FontLoader.referenceFontFamilies[j];
207 sizeWatcher = new SizeWatcher(/** @type HTMLElement */clonedDiv, {
208 container: this._testContainer,
209 delegate: this,
210 size: FontLoader.referenceFontFamiliesSizes[j],
211 direction: SizeWatcher.directions.increase,
212 dimension: SizeWatcher.dimensions.horizontal
213 });
214 // The prepareForWatch() and beginWatching() methods will be invoked in separate iterations to
215 // reduce number of browser's CSS recalculations.
216 sizeWatchers.push(sizeWatcher);
217 }
218 }
219 }
220
221 // Append the testContainer after all test elements to minimize DOM insertions
222 document.body.appendChild(this._testContainer);
223
224 if (FontLoader.useResizeEvent) {
225 for (j = 0; j < this._testContainer.childNodes.length; j++) {
226 clonedDiv = this._testContainer.childNodes[j];
227 // "resize" event works only with attachEvent
228 clonedDiv.attachEvent("onresize", (function(self, clonedDiv) {
229 return function() {
230 self._elementSizeChanged(clonedDiv);
231 }
232 })(this, clonedDiv));
233 }
234 window.setTimeout(function() {
235 for (j = 0; j < self._testContainer.childNodes.length; j++) {
236 clonedDiv = self._testContainer.childNodes[j];
237 clonedDiv.style.fontFamily = "'" + clonedDiv.getAttribute("data-font-family") + "', " + FontLoader.referenceFontFamilies[clonedDiv.getAttribute("data-ref-font-family-index")];
238 }
239 }, 0);
240 } else if (FontLoader.useIntervalChecking) {
241 // Start polling element sizes but also do first synchronous check in case all fonts where already loaded.
242 this._intervalId = window.setInterval(function intervalFire() {
243 self._checkSizes();
244 }, this._intervalDelay);
245 this._checkSizes();
246 } else {
247 // We are dividing the prepareForWatch() and beginWatching() methods to optimize browser performance by
248 // removing CSS recalculation from each iteration to the end of iterations.
249 for (i = 0; i < this._numberOfFontFamilies * FontLoader.referenceFontFamilies.length; i++) {
250 sizeWatcher = sizeWatchers[i];
251 sizeWatcher.prepareForWatch();
252 }
253 for (i = 0; i < this._numberOfFontFamilies * FontLoader.referenceFontFamilies.length; i++) {
254 sizeWatcher = sizeWatchers[i];
255 sizeWatcher.beginWatching();
256 // Apply tested font-family
257 clonedDiv = sizeWatcher.getWatchedElement();
258 clonedDiv.style.fontFamily = "'" + clonedDiv.getAttribute("data-font-family") + "', " + FontLoader.referenceFontFamilies[clonedDiv.getAttribute("data-ref-font-family-index")];
259 }
260 }
261 },
262 _checkSizes: function() {
263 var i, testDiv, currSize, refSize;
264 for (i = this._testContainer.childNodes.length - 1; i >= 0; i--) {
265 testDiv = this._testContainer.childNodes[i];
266 currSize = new Size(testDiv.offsetWidth, testDiv.offsetHeight);
267 refSize = FontLoader.referenceFontFamiliesSizes[testDiv.getAttribute("data-ref-font-family-index")];
268 if (!refSize.isEqual(currSize)) {
269 // Element dimensions changed, this means its font loaded, remove it from testContainer div
270 testDiv.parentNode.removeChild(testDiv);
271 this._elementSizeChanged(testDiv);
272 }
273 }
274 },
275 _elementSizeChanged: function(element) {
276 var fontFamily = element.getAttribute("data-font-family");
277
278 if (this._finished) {
279 return;
280 }
281
282 // Check that the font of this element wasn't already marked as loaded by an element with different reference font family.
283 if (typeof this._fontsMap[fontFamily] === "undefined") {
284 return;
285 }
286
287 this._numberOfLoadedFonts++;
288 delete this._fontsMap[fontFamily];
289
290 if (this.delegate && typeof this.delegate.fontLoaded === "function") {
291 this.delegate.fontLoaded(fontFamily);
292 }
293
294 if (this._numberOfLoadedFonts === this._numberOfFontFamilies) {
295 this._finish();
296 }
297 },
298 _finish: function() {
299 var callbackParameter,
300 fontFamily,
301 notLoadedFontFamilies = [];
302
303 if (this._finished) {
304 return;
305 }
306
307 this._finished = true;
308
309 if (this._adobeBlankSizeWatcher !== null) {
310 this._adobeBlankSizeWatcher = null;
311 }
312
313 if (this._testContainer !== null) {
314 this._testContainer.parentNode.removeChild(this._testContainer);
315 }
316
317 if (this._timeoutId !== null) {
318 window.clearTimeout(this._timeoutId);
319 }
320
321 if (this._intervalId !== null) {
322 window.clearInterval(this._intervalId);
323 }
324
325 if (this._numberOfLoadedFonts < this._numberOfFontFamilies) {
326 for (fontFamily in this._fontsMap) {
327 if (this._fontsMap.hasOwnProperty(fontFamily)) {
328 notLoadedFontFamilies.push(fontFamily);
329 }
330 }
331 callbackParameter = {
332 message: "Not all fonts were loaded",
333 notLoadedFontFamilies: notLoadedFontFamilies
334 };
335 } else {
336 callbackParameter = null;
337 }
338 if (this.delegate && typeof this.delegate.fontsLoaded === "function") {
339 this.delegate.fontsLoaded(callbackParameter);
340 }
341 },
342 /**
343 * SizeWatcher delegate method
344 * @param {SizeWatcher} sizeWatcher
345 */
346 sizeWatcherChangedSize: function(sizeWatcher) {
347 var watchedElement = sizeWatcher.getWatchedElement();
348 if (sizeWatcher === this._adobeBlankSizeWatcher) {
349 this._adobeBlankLoaded(watchedElement);
350 } else {
351 this._elementSizeChanged(watchedElement);
352 }
353 }
354 };
355
356 /**
357 * Size object
358 *
359 * @param width
360 * @param height
361 * @constructor
362 */
363 function Size(width, height) {
364 this.width = width;
365 this.height = height;
366 }
367
368 /**
369 * Compares receiver object to passed in size object.
370 *
371 * @param otherSize
372 * @returns {boolean}
373 */
374 Size.prototype.isEqual = function(otherSize) {
375 return (this.width === otherSize.width && this.height === otherSize.height);
376 };
377
378 /**
379 * SizeWatcher observes size of an element and notifies when its size is changed. It doesn't use any timeouts
380 * to check the element size, when change in size occurs a callback method immediately invoked.
381 *
382 * To watch for element's size changes the element, and other required elements are appended to a container element
383 * you specify, and which must be added to the DOM tree before invoking prepareForWatch() method. Your container
384 * element should be positioned outside of client's visible area. Therefore you shouldn't use SizeWatcher to watch
385 * for size changes of elements used for UI.
386 * Such container element could be a simple <div> that is a child of the <body> element:
387 * <div style="position:absolute; left:-10000px; top:-10000px;"></div>
388 *
389 * You must invoke SizeWatcher's methods in a specific order to establish size change listeners:
390 *
391 * 1. Create SizeWatcher instance by invoke SizeWatcher constructor passing the element (size of which you want to
392 * observe), the container element, the delegate object and optional size parameter of type Size which should be
393 * the pre-calculated initial size of your element.
394 * 4. Invoke prepareForWatch() method. This method will calculate element size if you didn't passed it to the constructor.
395 * 5. Invoke beginWatching() method. This method will set event listeners and invoke your delegate's method once
396 * element size changes.
397 *
398 * Failing to invoke above methods in their predefined order will throw an exception.
399 *
400 * @param {HTMLElement} element An element, size of which will be observed for changes.
401 * @param {Object} options
402 * @param {HTMLElement} options.container An element to which special observing elements will be added. Must be in DOM tree
403 * when prepareForWatch() method is called.
404 * @param {Object} options.delegate A delegate object with a sizeWatcherChangedSize method which will be invoked, in
405 * context of the delegate object, when change in size occurs. This method is invoked with single
406 * parameter which is the current SizeWatcher instance.
407 * @param {Size} [options.size] The pre-calculated initial size of your element. When passed, the element is not
408 * asked for offsetWidth and offsetHeight, which may be useful to reduce browser's CSS
409 * recalculations. If you will not pass the size parameter then its size calculation will be
410 * deferred to prepareForWatch() method.
411 * @param {Boolean} [options.continuous=false] A boolean flag indicating if the SizeWatcher will watch only for
412 * the first size change (default) or will continuously watch for size changes.
413 * @param {Number} [options.direction=SizeWatcher.directions.both] The direction of size change that should be
414 * watched: SizeWatcher.directions.increase, SizeWatcher.directions.decrease or
415 * SizeWatcher.directions.both
416 * @param {Number} [options.dimension=SizeWatcher.dimensions.both] The dimension of size change that should be
417 * watched: SizeWatcher.dimensions.horizontal, SizeWatcher.dimensions.vertical or
418 * SizeWatcher.dimensions.both
419 * @constructor
420 */
421 function SizeWatcher(element, options) {
422 this._element = element;
423 this._delegate = options.delegate;
424 this._size = null;
425 this._continuous = !!options.continuous;
426 this._direction = options.direction ? options.direction : SizeWatcher.directions.both;
427 this._dimension = options.dimension ? options.dimension : SizeWatcher.dimensions.both;
428 this._sizeIncreaseWatcherContentElm = null;
429 this._sizeDecreaseWatcherElm = null;
430 this._sizeIncreaseWatcherElm = null;
431 this._state = SizeWatcher.states.initialized;
432
433 this._generateScrollWatchers(options.size);
434 this._appendScrollWatchersToElement(options.container);
435 }
436
437 SizeWatcher.states = {
438 initialized: 0,
439 generatedScrollWatchers: 1,
440 appendedScrollWatchers: 2,
441 preparedScrollWatchers: 3,
442 watchingForSizeChange: 4
443 };
444
445 SizeWatcher.directions = {
446 decrease: 1,
447 increase: 2,
448 both: 3
449 };
450
451 SizeWatcher.dimensions = {
452 horizontal: 1,
453 vertical: 2,
454 both: 3
455 };
456
457 //noinspection JSUnusedLocalSymbols
458 SizeWatcher.prototype = {
459 constructor: SizeWatcher,
460 getWatchedElement: function() {
461 return this._element;
462 },
463 setSize: function(size) {
464 this._size = size;
465 //noinspection JSBitwiseOperatorUsage
466 if (this._direction & SizeWatcher.directions.increase) {
467 this._sizeIncreaseWatcherContentElm.style.cssText = "width: " + (size.width + 1) + "px; height: " + (size.height + 1) + "px;";
468 }
469 //noinspection JSBitwiseOperatorUsage
470 if (this._direction & SizeWatcher.directions.decrease) {
471 this._sizeDecreaseWatcherElm.style.cssText = "position:absolute; left: 0px; top: 0px; overflow: hidden; width: " + (size.width - 1) + "px; height: " + (size.height - 1) + "px;";
472 }
473 },
474 _generateScrollWatchers: function(size) {
475
476 this._element.style.position = "absolute";
477
478 //noinspection JSBitwiseOperatorUsage
479 if (this._direction & SizeWatcher.directions.increase) {
480 this._sizeIncreaseWatcherContentElm = document.createElement("div");
481
482 this._sizeIncreaseWatcherElm = document.createElement("div");
483 this._sizeIncreaseWatcherElm.style.cssText = "position: absolute; left: 0; top: 0; width: 100%; height: 100%; overflow: hidden;";
484 this._sizeIncreaseWatcherElm.appendChild(this._sizeIncreaseWatcherContentElm);
485
486 this._element.appendChild(this._sizeIncreaseWatcherElm);
487 }
488
489 //noinspection JSBitwiseOperatorUsage
490 if (this._direction & SizeWatcher.directions.decrease) {
491 this._sizeDecreaseWatcherElm = document.createElement("div");
492 this._sizeDecreaseWatcherElm.appendChild(this._element);
493 }
494
495 if (size) {
496 this.setSize(size);
497 }
498
499 this._state = SizeWatcher.states.generatedScrollWatchers;
500 },
501 _appendScrollWatchersToElement: function(container) {
502 if (this._state !== SizeWatcher.states.generatedScrollWatchers) {
503 throw new Error("SizeWatcher._appendScrollWatchersToElement() was invoked before SizeWatcher._generateScrollWatchers()");
504 }
505
506 //noinspection JSBitwiseOperatorUsage
507 if (this._direction & SizeWatcher.directions.decrease) {
508 container.appendChild(this._sizeDecreaseWatcherElm);
509 } else {
510 container.appendChild(this._element);
511 }
512
513 this._state = SizeWatcher.states.appendedScrollWatchers;
514 },
515 removeScrollWatchers: function() {
516 //noinspection JSBitwiseOperatorUsage
517 if (this._direction & SizeWatcher.directions.decrease) {
518 if (this._sizeDecreaseWatcherElm.parentNode) {
519 this._sizeDecreaseWatcherElm.parentNode.removeChild(this._sizeDecreaseWatcherElm);
520 }
521 } else if (this._element.parentNode) {
522 this._element.parentNode.removeChild(this._element);
523 }
524 },
525 prepareForWatch: function() {
526 var parentNode,
527 sizeDecreaseWatcherElmScrolled = true,
528 sizeIncreaseWatcherElmScrolled = true;
529
530 if (this._state !== SizeWatcher.states.appendedScrollWatchers) {
531 throw new Error("SizeWatcher.prepareForWatch() invoked before SizeWatcher._appendScrollWatchersToElement()");
532 }
533
534 if (this._size === null) {
535 this.setSize(new Size(this._element.offsetWidth, this._element.offsetHeight));
536 }
537
538 //noinspection JSBitwiseOperatorUsage
539 if (this._direction & SizeWatcher.directions.decrease) {
540 sizeDecreaseWatcherElmScrolled = this._scrollElementToBottomRight(this._sizeDecreaseWatcherElm);
541 }
542 //noinspection JSBitwiseOperatorUsage
543 if (this._direction & SizeWatcher.directions.increase) {
544 sizeIncreaseWatcherElmScrolled = this._scrollElementToBottomRight(this._sizeIncreaseWatcherElm);
545 }
546
547 // Check if scroll positions updated.
548 if (!sizeDecreaseWatcherElmScrolled || !sizeIncreaseWatcherElmScrolled) {
549
550 // Traverse tree to the top node to see if element is in the DOM tree.
551 parentNode = this._element.parentNode;
552 while (parentNode !== window.document && parentNode !== null) {
553 parentNode = parentNode.parentNode;
554 }
555
556 if (parentNode === null) {
557 throw new Error("Can't set scroll position of scroll watchers. SizeWatcher is not in the DOM tree.");
558 } else if (console && typeof console.warn === "function") {
559 console.warn("SizeWatcher can't set scroll position of scroll watchers.");
560 }
561 }
562
563 this._state = SizeWatcher.states.preparedScrollWatchers;
564 },
565 _scrollElementToBottomRight: function(element) {
566 var elementScrolled = true;
567 //noinspection JSBitwiseOperatorUsage
568 if (this._dimension & SizeWatcher.dimensions.vertical) {
569 element.scrollTop = 1;
570 elementScrolled = elementScrolled && element.scrollTop === 1;
571 }
572 //noinspection JSBitwiseOperatorUsage
573 if (this._dimension & SizeWatcher.dimensions.horizontal) {
574 element.scrollLeft = 1;
575 elementScrolled = elementScrolled && element.scrollLeft === 1;
576 }
577 return elementScrolled;
578 },
579 beginWatching: function() {
580 if (this._state !== SizeWatcher.states.preparedScrollWatchers) {
581 throw new Error("SizeWatcher.beginWatching() invoked before SizeWatcher.prepareForWatch()");
582 }
583
584 //noinspection JSBitwiseOperatorUsage
585 if (this._direction & SizeWatcher.directions.decrease) {
586 //noinspection JSValidateTypes
587 this._sizeDecreaseWatcherElm.addEventListener("scroll", this, false);
588 }
589 //noinspection JSBitwiseOperatorUsage
590 if (this._direction & SizeWatcher.directions.increase) {
591 //noinspection JSValidateTypes
592 this._sizeIncreaseWatcherElm.addEventListener("scroll", this, false);
593 }
594
595 this._state = SizeWatcher.states.watchingForSizeChange;
596 },
597 endWatching: function() {
598 if (this._state !== SizeWatcher.states.watchingForSizeChange) {
599 throw new Error("SizeWatcher.endWatching() invoked before SizeWatcher.beginWatching()");
600 }
601
602 //noinspection JSBitwiseOperatorUsage
603 if (this._direction & SizeWatcher.directions.decrease) {
604 //noinspection JSValidateTypes
605 this._sizeDecreaseWatcherElm.removeEventListener("scroll", this, false);
606 }
607 //noinspection JSBitwiseOperatorUsage
608 if (this._direction & SizeWatcher.directions.increase) {
609 //noinspection JSValidateTypes
610 this._sizeIncreaseWatcherElm.removeEventListener("scroll", this, false);
611 }
612 this._state = SizeWatcher.states.appendedScrollWatchers;
613 },
614 /**
615 * @private
616 */
617 handleEvent: function(event) {
618 var newSize, oldSize;
619
620 // This is not suppose to happen because when we run endWatching() we remove scroll listeners.
621 // But some browsers will fire second scroll event which was pushed into event stack before listener was
622 // removed so do this check anyway.
623 if (this._state !== SizeWatcher.states.watchingForSizeChange) {
624 return;
625 }
626
627 newSize = new Size(this._element.offsetWidth, this._element.offsetHeight);
628 oldSize = this._size;
629
630 // Check if element size is changed. How come that element size isn't changed but scroll event fired?
631 // This can happen in two cases: when double scroll occurs or immediately after calling prepareForWatch()
632 // (event if scroll event listeners attached after it).
633 // The double scroll event happens when one size dimension (e.g.:width) is increased and another
634 // (e.g.:height) is decreased.
635 if (oldSize.isEqual(newSize)) {
636 return;
637 }
638
639 if (this._delegate && typeof this._delegate.sizeWatcherChangedSize === "function") {
640 this._delegate.sizeWatcherChangedSize(this);
641
642 // Check that endWatching() wasn't invoked from within the delegate.
643 if (this._state !== SizeWatcher.states.watchingForSizeChange) {
644 return;
645 }
646 }
647
648 if (!this._continuous) {
649 this.endWatching();
650 } else {
651 // Set the new size so in case of double scroll event we won't cause the delegate method to be executed twice
652 // and also to update to the new watched size.
653 this.setSize(newSize);
654 // change state so prepareFowWatch() won't throw exception about wrong order invocation.
655 this._state = SizeWatcher.states.appendedScrollWatchers;
656 // Run prepareForWatch to reset the scroll watchers, we have already set the size
657 this.prepareForWatch();
658 // Set state to listeningForSizeChange, there is no need to invoke beginWatching() method as scroll event
659 // listeners and callback are already set.
660 this._state = SizeWatcher.states.watchingForSizeChange;
661
662 }
663 }
664 };
665
666}(window));
\No newline at end of file