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comparison: dom/tests/mochitest/ajax/scriptaculous/src/dragdrop.js

dom/tests/mochitest/ajax/scriptaculous/src/dragdrop.js

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1 // script.aculo.us dragdrop.js v1.7.1_beta2, Tue May 15 15:15:45 EDT 2007
2
3 // Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
4 // (c) 2005-2007 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz)
5 //
6 // script.aculo.us is freely distributable under the terms of an MIT-style license.
7 // For details, see the script.aculo.us web site: http://script.aculo.us/
8
9 if(typeof Effect == 'undefined')
10 throw("dragdrop.js requires including script.aculo.us' effects.js library");
11
12 var Droppables = {
13 drops: [],
14
15 remove: function(element) {
16 this.drops = this.drops.reject(function(d) { return d.element==$(element) });
17 },
18
19 add: function(element) {
20 element = $(element);
21 var options = Object.extend({
22 greedy: true,
23 hoverclass: null,
24 tree: false
25 }, arguments[1] || {});
26
27 // cache containers
28 if(options.containment) {
29 options._containers = [];
30 var containment = options.containment;
31 if((typeof containment == 'object') &&
32 (containment.constructor == Array)) {
33 containment.each( function(c) { options._containers.push($(c)) });
34 } else {
35 options._containers.push($(containment));
36 }
37 }
38
39 if(options.accept) options.accept = [options.accept].flatten();
40
41 Element.makePositioned(element); // fix IE
42 options.element = element;
43
44 this.drops.push(options);
45 },
46
47 findDeepestChild: function(drops) {
48 deepest = drops[0];
49
50 for (i = 1; i < drops.length; ++i)
51 if (Element.isParent(drops[i].element, deepest.element))
52 deepest = drops[i];
53
54 return deepest;
55 },
56
57 isContained: function(element, drop) {
58 var containmentNode;
59 if(drop.tree) {
60 containmentNode = element.treeNode;
61 } else {
62 containmentNode = element.parentNode;
63 }
64 return drop._containers.detect(function(c) { return containmentNode == c });
65 },
66
67 isAffected: function(point, element, drop) {
68 return (
69 (drop.element!=element) &&
70 ((!drop._containers) ||
71 this.isContained(element, drop)) &&
72 ((!drop.accept) ||
73 (Element.classNames(element).detect(
74 function(v) { return drop.accept.include(v) } ) )) &&
75 Position.within(drop.element, point[0], point[1]) );
76 },
77
78 deactivate: function(drop) {
79 if(drop.hoverclass)
80 Element.removeClassName(drop.element, drop.hoverclass);
81 this.last_active = null;
82 },
83
84 activate: function(drop) {
85 if(drop.hoverclass)
86 Element.addClassName(drop.element, drop.hoverclass);
87 this.last_active = drop;
88 },
89
90 show: function(point, element) {
91 if(!this.drops.length) return;
92 var affected = [];
93
94 if(this.last_active) this.deactivate(this.last_active);
95 this.drops.each( function(drop) {
96 if(Droppables.isAffected(point, element, drop))
97 affected.push(drop);
98 });
99
100 if(affected.length>0) {
101 drop = Droppables.findDeepestChild(affected);
102 Position.within(drop.element, point[0], point[1]);
103 if(drop.onHover)
104 drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
105
106 Droppables.activate(drop);
107 }
108 },
109
110 fire: function(event, element) {
111 if(!this.last_active) return;
112 Position.prepare();
113
114 if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
115 if (this.last_active.onDrop) {
116 this.last_active.onDrop(element, this.last_active.element, event);
117 return true;
118 }
119 },
120
121 reset: function() {
122 if(this.last_active)
123 this.deactivate(this.last_active);
124 }
125 }
126
127 var Draggables = {
128 drags: [],
129 observers: [],
130
131 register: function(draggable) {
132 if(this.drags.length == 0) {
133 this.eventMouseUp = this.endDrag.bindAsEventListener(this);
134 this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
135 this.eventKeypress = this.keyPress.bindAsEventListener(this);
136
137 Event.observe(document, "mouseup", this.eventMouseUp);
138 Event.observe(document, "mousemove", this.eventMouseMove);
139 Event.observe(document, "keypress", this.eventKeypress);
140 }
141 this.drags.push(draggable);
142 },
143
144 unregister: function(draggable) {
145 this.drags = this.drags.reject(function(d) { return d==draggable });
146 if(this.drags.length == 0) {
147 Event.stopObserving(document, "mouseup", this.eventMouseUp);
148 Event.stopObserving(document, "mousemove", this.eventMouseMove);
149 Event.stopObserving(document, "keypress", this.eventKeypress);
150 }
151 },
152
153 activate: function(draggable) {
154 if(draggable.options.delay) {
155 this._timeout = setTimeout(function() {
156 Draggables._timeout = null;
157 window.focus();
158 Draggables.activeDraggable = draggable;
159 }.bind(this), draggable.options.delay);
160 } else {
161 window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
162 this.activeDraggable = draggable;
163 }
164 },
165
166 deactivate: function() {
167 this.activeDraggable = null;
168 },
169
170 updateDrag: function(event) {
171 if(!this.activeDraggable) return;
172 var pointer = [Event.pointerX(event), Event.pointerY(event)];
173 // Mozilla-based browsers fire successive mousemove events with
174 // the same coordinates, prevent needless redrawing (moz bug?)
175 if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
176 this._lastPointer = pointer;
177
178 this.activeDraggable.updateDrag(event, pointer);
179 },
180
181 endDrag: function(event) {
182 if(this._timeout) {
183 clearTimeout(this._timeout);
184 this._timeout = null;
185 }
186 if(!this.activeDraggable) return;
187 this._lastPointer = null;
188 this.activeDraggable.endDrag(event);
189 this.activeDraggable = null;
190 },
191
192 keyPress: function(event) {
193 if(this.activeDraggable)
194 this.activeDraggable.keyPress(event);
195 },
196
197 addObserver: function(observer) {
198 this.observers.push(observer);
199 this._cacheObserverCallbacks();
200 },
201
202 removeObserver: function(element) { // element instead of observer fixes mem leaks
203 this.observers = this.observers.reject( function(o) { return o.element==element });
204 this._cacheObserverCallbacks();
205 },
206
207 notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag'
208 if(this[eventName+'Count'] > 0)
209 this.observers.each( function(o) {
210 if(o[eventName]) o[eventName](eventName, draggable, event);
211 });
212 if(draggable.options[eventName]) draggable.options[eventName](draggable, event);
213 },
214
215 _cacheObserverCallbacks: function() {
216 ['onStart','onEnd','onDrag'].each( function(eventName) {
217 Draggables[eventName+'Count'] = Draggables.observers.select(
218 function(o) { return o[eventName]; }
219 ).length;
220 });
221 }
222 }
223
224 /*--------------------------------------------------------------------------*/
225
226 var Draggable = Class.create();
227 Draggable._dragging = {};
228
229 Draggable.prototype = {
230 initialize: function(element) {
231 var defaults = {
232 handle: false,
233 reverteffect: function(element, top_offset, left_offset) {
234 var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
235 new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur,
236 queue: {scope:'_draggable', position:'end'}
237 });
238 },
239 endeffect: function(element) {
240 var toOpacity = typeof element._opacity == 'number' ? element._opacity : 1.0;
241 new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity,
242 queue: {scope:'_draggable', position:'end'},
243 afterFinish: function(){
244 Draggable._dragging[element] = false
245 }
246 });
247 },
248 zindex: 1000,
249 revert: false,
250 quiet: false,
251 scroll: false,
252 scrollSensitivity: 20,
253 scrollSpeed: 15,
254 snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] }
255 delay: 0
256 };
257
258 if(!arguments[1] || typeof arguments[1].endeffect == 'undefined')
259 Object.extend(defaults, {
260 starteffect: function(element) {
261 element._opacity = Element.getOpacity(element);
262 Draggable._dragging[element] = true;
263 new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7});
264 }
265 });
266
267 var options = Object.extend(defaults, arguments[1] || {});
268
269 this.element = $(element);
270
271 if(options.handle && (typeof options.handle == 'string'))
272 this.handle = this.element.down('.'+options.handle, 0);
273
274 if(!this.handle) this.handle = $(options.handle);
275 if(!this.handle) this.handle = this.element;
276
277 if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) {
278 options.scroll = $(options.scroll);
279 this._isScrollChild = Element.childOf(this.element, options.scroll);
280 }
281
282 Element.makePositioned(this.element); // fix IE
283
284 this.delta = this.currentDelta();
285 this.options = options;
286 this.dragging = false;
287
288 this.eventMouseDown = this.initDrag.bindAsEventListener(this);
289 Event.observe(this.handle, "mousedown", this.eventMouseDown);
290
291 Draggables.register(this);
292 },
293
294 destroy: function() {
295 Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
296 Draggables.unregister(this);
297 },
298
299 currentDelta: function() {
300 return([
301 parseInt(Element.getStyle(this.element,'left') || '0'),
302 parseInt(Element.getStyle(this.element,'top') || '0')]);
303 },
304
305 initDrag: function(event) {
306 if(typeof Draggable._dragging[this.element] != 'undefined' &&
307 Draggable._dragging[this.element]) return;
308 if(Event.isLeftClick(event)) {
309 // abort on form elements, fixes a Firefox issue
310 var src = Event.element(event);
311 if((tag_name = src.tagName.toUpperCase()) && (
312 tag_name=='INPUT' ||
313 tag_name=='SELECT' ||
314 tag_name=='OPTION' ||
315 tag_name=='BUTTON' ||
316 tag_name=='TEXTAREA')) return;
317
318 var pointer = [Event.pointerX(event), Event.pointerY(event)];
319 var pos = Position.cumulativeOffset(this.element);
320 this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
321
322 Draggables.activate(this);
323 Event.stop(event);
324 }
325 },
326
327 startDrag: function(event) {
328 this.dragging = true;
329
330 if(this.options.zindex) {
331 this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
332 this.element.style.zIndex = this.options.zindex;
333 }
334
335 if(this.options.ghosting) {
336 this._clone = this.element.cloneNode(true);
337 Position.absolutize(this.element);
338 this.element.parentNode.insertBefore(this._clone, this.element);
339 }
340
341 if(this.options.scroll) {
342 if (this.options.scroll == window) {
343 var where = this._getWindowScroll(this.options.scroll);
344 this.originalScrollLeft = where.left;
345 this.originalScrollTop = where.top;
346 } else {
347 this.originalScrollLeft = this.options.scroll.scrollLeft;
348 this.originalScrollTop = this.options.scroll.scrollTop;
349 }
350 }
351
352 Draggables.notify('onStart', this, event);
353
354 if(this.options.starteffect) this.options.starteffect(this.element);
355 },
356
357 updateDrag: function(event, pointer) {
358 if(!this.dragging) this.startDrag(event);
359
360 if(!this.options.quiet){
361 Position.prepare();
362 Droppables.show(pointer, this.element);
363 }
364
365 Draggables.notify('onDrag', this, event);
366
367 this.draw(pointer);
368 if(this.options.change) this.options.change(this);
369
370 if(this.options.scroll) {
371 this.stopScrolling();
372
373 var p;
374 if (this.options.scroll == window) {
375 with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
376 } else {
377 p = Position.page(this.options.scroll);
378 p[0] += this.options.scroll.scrollLeft + Position.deltaX;
379 p[1] += this.options.scroll.scrollTop + Position.deltaY;
380 p.push(p[0]+this.options.scroll.offsetWidth);
381 p.push(p[1]+this.options.scroll.offsetHeight);
382 }
383 var speed = [0,0];
384 if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
385 if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
386 if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
387 if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
388 this.startScrolling(speed);
389 }
390
391 // fix AppleWebKit rendering
392 if(Prototype.Browser.WebKit) window.scrollBy(0,0);
393
394 Event.stop(event);
395 },
396
397 finishDrag: function(event, success) {
398 this.dragging = false;
399
400 if(this.options.quiet){
401 Position.prepare();
402 var pointer = [Event.pointerX(event), Event.pointerY(event)];
403 Droppables.show(pointer, this.element);
404 }
405
406 if(this.options.ghosting) {
407 Position.relativize(this.element);
408 Element.remove(this._clone);
409 this._clone = null;
410 }
411
412 var dropped = false;
413 if(success) {
414 dropped = Droppables.fire(event, this.element);
415 if (!dropped) dropped = false;
416 }
417 if(dropped && this.options.onDropped) this.options.onDropped(this.element);
418 Draggables.notify('onEnd', this, event);
419
420 var revert = this.options.revert;
421 if(revert && typeof revert == 'function') revert = revert(this.element);
422
423 var d = this.currentDelta();
424 if(revert && this.options.reverteffect) {
425 if (dropped == 0 || revert != 'failure')
426 this.options.reverteffect(this.element,
427 d[1]-this.delta[1], d[0]-this.delta[0]);
428 } else {
429 this.delta = d;
430 }
431
432 if(this.options.zindex)
433 this.element.style.zIndex = this.originalZ;
434
435 if(this.options.endeffect)
436 this.options.endeffect(this.element);
437
438 Draggables.deactivate(this);
439 Droppables.reset();
440 },
441
442 keyPress: function(event) {
443 if(event.keyCode!=Event.KEY_ESC) return;
444 this.finishDrag(event, false);
445 Event.stop(event);
446 },
447
448 endDrag: function(event) {
449 if(!this.dragging) return;
450 this.stopScrolling();
451 this.finishDrag(event, true);
452 Event.stop(event);
453 },
454
455 draw: function(point) {
456 var pos = Position.cumulativeOffset(this.element);
457 if(this.options.ghosting) {
458 var r = Position.realOffset(this.element);
459 pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY;
460 }
461
462 var d = this.currentDelta();
463 pos[0] -= d[0]; pos[1] -= d[1];
464
465 if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) {
466 pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
467 pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
468 }
469
470 var p = [0,1].map(function(i){
471 return (point[i]-pos[i]-this.offset[i])
472 }.bind(this));
473
474 if(this.options.snap) {
475 if(typeof this.options.snap == 'function') {
476 p = this.options.snap(p[0],p[1],this);
477 } else {
478 if(this.options.snap instanceof Array) {
479 p = p.map( function(v, i) {
480 return Math.round(v/this.options.snap[i])*this.options.snap[i] }.bind(this))
481 } else {
482 p = p.map( function(v) {
483 return Math.round(v/this.options.snap)*this.options.snap }.bind(this))
484 }
485 }}
486
487 var style = this.element.style;
488 if((!this.options.constraint) || (this.options.constraint=='horizontal'))
489 style.left = p[0] + "px";
490 if((!this.options.constraint) || (this.options.constraint=='vertical'))
491 style.top = p[1] + "px";
492
493 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
494 },
495
496 stopScrolling: function() {
497 if(this.scrollInterval) {
498 clearInterval(this.scrollInterval);
499 this.scrollInterval = null;
500 Draggables._lastScrollPointer = null;
501 }
502 },
503
504 startScrolling: function(speed) {
505 if(!(speed[0] || speed[1])) return;
506 this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
507 this.lastScrolled = new Date();
508 this.scrollInterval = setInterval(this.scroll.bind(this), 10);
509 },
510
511 scroll: function() {
512 var current = new Date();
513 var delta = current - this.lastScrolled;
514 this.lastScrolled = current;
515 if(this.options.scroll == window) {
516 with (this._getWindowScroll(this.options.scroll)) {
517 if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
518 var d = delta / 1000;
519 this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
520 }
521 }
522 } else {
523 this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
524 this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000;
525 }
526
527 Position.prepare();
528 Droppables.show(Draggables._lastPointer, this.element);
529 Draggables.notify('onDrag', this);
530 if (this._isScrollChild) {
531 Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
532 Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
533 Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
534 if (Draggables._lastScrollPointer[0] < 0)
535 Draggables._lastScrollPointer[0] = 0;
536 if (Draggables._lastScrollPointer[1] < 0)
537 Draggables._lastScrollPointer[1] = 0;
538 this.draw(Draggables._lastScrollPointer);
539 }
540
541 if(this.options.change) this.options.change(this);
542 },
543
544 _getWindowScroll: function(w) {
545 var T, L, W, H;
546 with (w.document) {
547 if (w.document.documentElement && documentElement.scrollTop) {
548 T = documentElement.scrollTop;
549 L = documentElement.scrollLeft;
550 } else if (w.document.body) {
551 T = body.scrollTop;
552 L = body.scrollLeft;
553 }
554 if (w.innerWidth) {
555 W = w.innerWidth;
556 H = w.innerHeight;
557 } else if (w.document.documentElement && documentElement.clientWidth) {
558 W = documentElement.clientWidth;
559 H = documentElement.clientHeight;
560 } else {
561 W = body.offsetWidth;
562 H = body.offsetHeight
563 }
564 }
565 return { top: T, left: L, width: W, height: H };
566 }
567 }
568
569 /*--------------------------------------------------------------------------*/
570
571 var SortableObserver = Class.create();
572 SortableObserver.prototype = {
573 initialize: function(element, observer) {
574 this.element = $(element);
575 this.observer = observer;
576 this.lastValue = Sortable.serialize(this.element);
577 },
578
579 onStart: function() {
580 this.lastValue = Sortable.serialize(this.element);
581 },
582
583 onEnd: function() {
584 Sortable.unmark();
585 if(this.lastValue != Sortable.serialize(this.element))
586 this.observer(this.element)
587 }
588 }
589
590 var Sortable = {
591 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,
592
593 sortables: {},
594
595 _findRootElement: function(element) {
596 while (element.tagName.toUpperCase() != "BODY") {
597 if(element.id && Sortable.sortables[element.id]) return element;
598 element = element.parentNode;
599 }
600 },
601
602 options: function(element) {
603 element = Sortable._findRootElement($(element));
604 if(!element) return;
605 return Sortable.sortables[element.id];
606 },
607
608 destroy: function(element){
609 var s = Sortable.options(element);
610
611 if(s) {
612 Draggables.removeObserver(s.element);
613 s.droppables.each(function(d){ Droppables.remove(d) });
614 s.draggables.invoke('destroy');
615
616 delete Sortable.sortables[s.element.id];
617 }
618 },
619
620 create: function(element) {
621 element = $(element);
622 var options = Object.extend({
623 element: element,
624 tag: 'li', // assumes li children, override with tag: 'tagname'
625 dropOnEmpty: false,
626 tree: false,
627 treeTag: 'ul',
628 overlap: 'vertical', // one of 'vertical', 'horizontal'
629 constraint: 'vertical', // one of 'vertical', 'horizontal', false
630 containment: element, // also takes array of elements (or id's); or false
631 handle: false, // or a CSS class
632 only: false,
633 delay: 0,
634 hoverclass: null,
635 ghosting: false,
636 quiet: false,
637 scroll: false,
638 scrollSensitivity: 20,
639 scrollSpeed: 15,
640 format: this.SERIALIZE_RULE,
641
642 // these take arrays of elements or ids and can be
643 // used for better initialization performance
644 elements: false,
645 handles: false,
646
647 onChange: Prototype.emptyFunction,
648 onUpdate: Prototype.emptyFunction
649 }, arguments[1] || {});
650
651 // clear any old sortable with same element
652 this.destroy(element);
653
654 // build options for the draggables
655 var options_for_draggable = {
656 revert: true,
657 quiet: options.quiet,
658 scroll: options.scroll,
659 scrollSpeed: options.scrollSpeed,
660 scrollSensitivity: options.scrollSensitivity,
661 delay: options.delay,
662 ghosting: options.ghosting,
663 constraint: options.constraint,
664 handle: options.handle };
665
666 if(options.starteffect)
667 options_for_draggable.starteffect = options.starteffect;
668
669 if(options.reverteffect)
670 options_for_draggable.reverteffect = options.reverteffect;
671 else
672 if(options.ghosting) options_for_draggable.reverteffect = function(element) {
673 element.style.top = 0;
674 element.style.left = 0;
675 };
676
677 if(options.endeffect)
678 options_for_draggable.endeffect = options.endeffect;
679
680 if(options.zindex)
681 options_for_draggable.zindex = options.zindex;
682
683 // build options for the droppables
684 var options_for_droppable = {
685 overlap: options.overlap,
686 containment: options.containment,
687 tree: options.tree,
688 hoverclass: options.hoverclass,
689 onHover: Sortable.onHover
690 }
691
692 var options_for_tree = {
693 onHover: Sortable.onEmptyHover,
694 overlap: options.overlap,
695 containment: options.containment,
696 hoverclass: options.hoverclass
697 }
698
699 // fix for gecko engine
700 Element.cleanWhitespace(element);
701
702 options.draggables = [];
703 options.droppables = [];
704
705 // drop on empty handling
706 if(options.dropOnEmpty || options.tree) {
707 Droppables.add(element, options_for_tree);
708 options.droppables.push(element);
709 }
710
711 (options.elements || this.findElements(element, options) || []).each( function(e,i) {
712 var handle = options.handles ? $(options.handles[i]) :
713 (options.handle ? $(e).getElementsByClassName(options.handle)[0] : e);
714 options.draggables.push(
715 new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
716 Droppables.add(e, options_for_droppable);
717 if(options.tree) e.treeNode = element;
718 options.droppables.push(e);
719 });
720
721 if(options.tree) {
722 (Sortable.findTreeElements(element, options) || []).each( function(e) {
723 Droppables.add(e, options_for_tree);
724 e.treeNode = element;
725 options.droppables.push(e);
726 });
727 }
728
729 // keep reference
730 this.sortables[element.id] = options;
731
732 // for onupdate
733 Draggables.addObserver(new SortableObserver(element, options.onUpdate));
734
735 },
736
737 // return all suitable-for-sortable elements in a guaranteed order
738 findElements: function(element, options) {
739 return Element.findChildren(
740 element, options.only, options.tree ? true : false, options.tag);
741 },
742
743 findTreeElements: function(element, options) {
744 return Element.findChildren(
745 element, options.only, options.tree ? true : false, options.treeTag);
746 },
747
748 onHover: function(element, dropon, overlap) {
749 if(Element.isParent(dropon, element)) return;
750
751 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
752 return;
753 } else if(overlap>0.5) {
754 Sortable.mark(dropon, 'before');
755 if(dropon.previousSibling != element) {
756 var oldParentNode = element.parentNode;
757 element.style.visibility = "hidden"; // fix gecko rendering
758 dropon.parentNode.insertBefore(element, dropon);
759 if(dropon.parentNode!=oldParentNode)
760 Sortable.options(oldParentNode).onChange(element);
761 Sortable.options(dropon.parentNode).onChange(element);
762 }
763 } else {
764 Sortable.mark(dropon, 'after');
765 var nextElement = dropon.nextSibling || null;
766 if(nextElement != element) {
767 var oldParentNode = element.parentNode;
768 element.style.visibility = "hidden"; // fix gecko rendering
769 dropon.parentNode.insertBefore(element, nextElement);
770 if(dropon.parentNode!=oldParentNode)
771 Sortable.options(oldParentNode).onChange(element);
772 Sortable.options(dropon.parentNode).onChange(element);
773 }
774 }
775 },
776
777 onEmptyHover: function(element, dropon, overlap) {
778 var oldParentNode = element.parentNode;
779 var droponOptions = Sortable.options(dropon);
780
781 if(!Element.isParent(dropon, element)) {
782 var index;
783
784 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only});
785 var child = null;
786
787 if(children) {
788 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);
789
790 for (index = 0; index < children.length; index += 1) {
791 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
792 offset -= Element.offsetSize (children[index], droponOptions.overlap);
793 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
794 child = index + 1 < children.length ? children[index + 1] : null;
795 break;
796 } else {
797 child = children[index];
798 break;
799 }
800 }
801 }
802
803 dropon.insertBefore(element, child);
804
805 Sortable.options(oldParentNode).onChange(element);
806 droponOptions.onChange(element);
807 }
808 },
809
810 unmark: function() {
811 if(Sortable._marker) Sortable._marker.hide();
812 },
813
814 mark: function(dropon, position) {
815 // mark on ghosting only
816 var sortable = Sortable.options(dropon.parentNode);
817 if(sortable && !sortable.ghosting) return;
818
819 if(!Sortable._marker) {
820 Sortable._marker =
821 ($('dropmarker') || Element.extend(document.createElement('DIV'))).
822 hide().addClassName('dropmarker').setStyle({position:'absolute'});
823 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
824 }
825 var offsets = Position.cumulativeOffset(dropon);
826 Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'});
827
828 if(position=='after')
829 if(sortable.overlap == 'horizontal')
830 Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'});
831 else
832 Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'});
833
834 Sortable._marker.show();
835 },
836
837 _tree: function(element, options, parent) {
838 var children = Sortable.findElements(element, options) || [];
839
840 for (var i = 0; i < children.length; ++i) {
841 var match = children[i].id.match(options.format);
842
843 if (!match) continue;
844
845 var child = {
846 id: encodeURIComponent(match ? match[1] : null),
847 element: element,
848 parent: parent,
849 children: [],
850 position: parent.children.length,
851 container: $(children[i]).down(options.treeTag)
852 }
853
854 /* Get the element containing the children and recurse over it */
855 if (child.container)
856 this._tree(child.container, options, child)
857
858 parent.children.push (child);
859 }
860
861 return parent;
862 },
863
864 tree: function(element) {
865 element = $(element);
866 var sortableOptions = this.options(element);
867 var options = Object.extend({
868 tag: sortableOptions.tag,
869 treeTag: sortableOptions.treeTag,
870 only: sortableOptions.only,
871 name: element.id,
872 format: sortableOptions.format
873 }, arguments[1] || {});
874
875 var root = {
876 id: null,
877 parent: null,
878 children: [],
879 container: element,
880 position: 0
881 }
882
883 return Sortable._tree(element, options, root);
884 },
885
886 /* Construct a [i] index for a particular node */
887 _constructIndex: function(node) {
888 var index = '';
889 do {
890 if (node.id) index = '[' + node.position + ']' + index;
891 } while ((node = node.parent) != null);
892 return index;
893 },
894
895 sequence: function(element) {
896 element = $(element);
897 var options = Object.extend(this.options(element), arguments[1] || {});
898
899 return $(this.findElements(element, options) || []).map( function(item) {
900 return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
901 });
902 },
903
904 setSequence: function(element, new_sequence) {
905 element = $(element);
906 var options = Object.extend(this.options(element), arguments[2] || {});
907
908 var nodeMap = {};
909 this.findElements(element, options).each( function(n) {
910 if (n.id.match(options.format))
911 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
912 n.parentNode.removeChild(n);
913 });
914
915 new_sequence.each(function(ident) {
916 var n = nodeMap[ident];
917 if (n) {
918 n[1].appendChild(n[0]);
919 delete nodeMap[ident];
920 }
921 });
922 },
923
924 serialize: function(element) {
925 element = $(element);
926 var options = Object.extend(Sortable.options(element), arguments[1] || {});
927 var name = encodeURIComponent(
928 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);
929
930 if (options.tree) {
931 return Sortable.tree(element, arguments[1]).children.map( function (item) {
932 return [name + Sortable._constructIndex(item) + "[id]=" +
933 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
934 }).flatten().join('&');
935 } else {
936 return Sortable.sequence(element, arguments[1]).map( function(item) {
937 return name + "[]=" + encodeURIComponent(item);
938 }).join('&');
939 }
940 }
941 }
942
943 // Returns true if child is contained within element
944 Element.isParent = function(child, element) {
945 if (!child.parentNode || child == element) return false;
946 if (child.parentNode == element) return true;
947 return Element.isParent(child.parentNode, element);
948 }
949
950 Element.findChildren = function(element, only, recursive, tagName) {
951 if(!element.hasChildNodes()) return null;
952 tagName = tagName.toUpperCase();
953 if(only) only = [only].flatten();
954 var elements = [];
955 $A(element.childNodes).each( function(e) {
956 if(e.tagName && e.tagName.toUpperCase()==tagName &&
957 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
958 elements.push(e);
959 if(recursive) {
960 var grandchildren = Element.findChildren(e, only, recursive, tagName);
961 if(grandchildren) elements.push(grandchildren);
962 }
963 });
964
965 return (elements.length>0 ? elements.flatten() : []);
966 }
967
968 Element.offsetSize = function (element, type) {
969 return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')];
970 }

Mercurial Repository: The Tor Browser

Europalab SCM Repository Server

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