1 // script.aculo.us dragdrop.js v1.6.4, Wed Sep 06 11:30:58 CEST 2006
3 // Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
4 // (c) 2005 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz)
6 // See scriptaculous.js for full license.
8 /*--------------------------------------------------------------------------*/
10 if(typeof Effect == 'undefined')
11 throw("dragdrop.js requires including script.aculo.us' effects.js library");
16 remove: function(element) {
17 this.drops = this.drops.reject(function(d) { return d.element==$(element) });
20 add: function(element) {
22 var options = Object.extend({
26 }, arguments[1] || {});
29 if(options.containment) {
30 options._containers = [];
31 var containment = options.containment;
32 if((typeof containment == 'object') &&
33 (containment.constructor == Array)) {
34 containment.each( function(c) { options._containers.push($(c)) });
36 options._containers.push($(containment));
40 if(options.accept) options.accept = [options.accept].flatten();
42 Element.makePositioned(element); // fix IE
43 options.element = element;
45 this.drops.push(options);
48 findDeepestChild: function(drops) {
51 for (i = 1; i < drops.length; ++i)
52 if (Element.isParent(drops[i].element, deepest.element))
58 isContained: function(element, drop) {
61 containmentNode = element.treeNode;
63 containmentNode = element.parentNode;
65 return drop._containers.detect(function(c) { return containmentNode == c });
68 isAffected: function(point, element, drop) {
70 (drop.element!=element) &&
71 ((!drop._containers) ||
72 this.isContained(element, drop)) &&
74 (Element.classNames(element).detect(
75 function(v) { return drop.accept.include(v) } ) )) &&
76 Position.within(drop.element, point[0], point[1]) );
79 deactivate: function(drop) {
81 Element.removeClassName(drop.element, drop.hoverclass);
82 this.last_active = null;
85 activate: function(drop) {
87 Element.addClassName(drop.element, drop.hoverclass);
88 this.last_active = drop;
91 show: function(point, element) {
92 if(!this.drops.length) return;
95 if(this.last_active) this.deactivate(this.last_active);
96 this.drops.each( function(drop) {
97 if(Droppables.isAffected(point, element, drop))
101 if(affected.length>0) {
102 drop = Droppables.findDeepestChild(affected);
103 Position.within(drop.element, point[0], point[1]);
105 drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
107 Droppables.activate(drop);
111 fire: function(event, element) {
112 if(!this.last_active) return;
115 if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
116 if (this.last_active.onDrop)
117 this.last_active.onDrop(element, this.last_active.element, event);
122 this.deactivate(this.last_active);
130 register: function(draggable) {
131 if(this.drags.length == 0) {
132 this.eventMouseUp = this.endDrag.bindAsEventListener(this);
133 this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
134 this.eventKeypress = this.keyPress.bindAsEventListener(this);
136 Event.observe(document, "mouseup", this.eventMouseUp);
137 Event.observe(document, "mousemove", this.eventMouseMove);
138 Event.observe(document, "keypress", this.eventKeypress);
140 this.drags.push(draggable);
143 unregister: function(draggable) {
144 this.drags = this.drags.reject(function(d) { return d==draggable });
145 if(this.drags.length == 0) {
146 Event.stopObserving(document, "mouseup", this.eventMouseUp);
147 Event.stopObserving(document, "mousemove", this.eventMouseMove);
148 Event.stopObserving(document, "keypress", this.eventKeypress);
152 activate: function(draggable) {
153 if(draggable.options.delay) {
154 this._timeout = setTimeout(function() {
155 Draggables._timeout = null;
157 Draggables.activeDraggable = draggable;
158 }.bind(this), draggable.options.delay);
160 window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
161 this.activeDraggable = draggable;
165 deactivate: function() {
166 this.activeDraggable = null;
169 updateDrag: function(event) {
170 if(!this.activeDraggable) return;
171 var pointer = [Event.pointerX(event), Event.pointerY(event)];
172 // Mozilla-based browsers fire successive mousemove events with
173 // the same coordinates, prevent needless redrawing (moz bug?)
174 if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
175 this._lastPointer = pointer;
177 this.activeDraggable.updateDrag(event, pointer);
180 endDrag: function(event) {
182 clearTimeout(this._timeout);
183 this._timeout = null;
185 if(!this.activeDraggable) return;
186 this._lastPointer = null;
187 this.activeDraggable.endDrag(event);
188 this.activeDraggable = null;
191 keyPress: function(event) {
192 if(this.activeDraggable)
193 this.activeDraggable.keyPress(event);
196 addObserver: function(observer) {
197 this.observers.push(observer);
198 this._cacheObserverCallbacks();
201 removeObserver: function(element) { // element instead of observer fixes mem leaks
202 this.observers = this.observers.reject( function(o) { return o.element==element });
203 this._cacheObserverCallbacks();
206 notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag'
207 if(this[eventName+'Count'] > 0)
208 this.observers.each( function(o) {
209 if(o[eventName]) o[eventName](eventName, draggable, event);
211 if(draggable.options[eventName]) draggable.options[eventName](draggable, event);
214 _cacheObserverCallbacks: function() {
215 ['onStart','onEnd','onDrag'].each( function(eventName) {
216 Draggables[eventName+'Count'] = Draggables.observers.select(
217 function(o) { return o[eventName]; }
223 /*--------------------------------------------------------------------------*/
225 var Draggable = Class.create();
226 Draggable._dragging = {};
228 Draggable.prototype = {
229 initialize: function(element) {
232 reverteffect: function(element, top_offset, left_offset) {
233 var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
234 new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur,
235 queue: {scope:'_draggable', position:'end'}
238 endeffect: function(element) {
239 var toOpacity = typeof element._opacity == 'number' ? element._opacity : 1.0;
240 new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity,
241 queue: {scope:'_draggable', position:'end'},
242 afterFinish: function(){
243 Draggable._dragging[element] = false
250 scrollSensitivity: 20,
252 snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] }
256 if(arguments[1] && typeof arguments[1].endeffect == 'undefined')
257 Object.extend(defaults, {
258 starteffect: function(element) {
259 element._opacity = Element.getOpacity(element);
260 Draggable._dragging[element] = true;
261 new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7});
265 var options = Object.extend(defaults, arguments[1] || {});
267 this.element = $(element);
269 if(options.handle && (typeof options.handle == 'string')) {
270 var h = Element.childrenWithClassName(this.element, options.handle, true);
271 if(h.length>0) this.handle = h[0];
273 if(!this.handle) this.handle = $(options.handle);
274 if(!this.handle) this.handle = this.element;
276 if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) {
277 options.scroll = $(options.scroll);
278 this._isScrollChild = Element.childOf(this.element, options.scroll);
281 Element.makePositioned(this.element); // fix IE
283 this.delta = this.currentDelta();
284 this.options = options;
285 this.dragging = false;
287 this.eventMouseDown = this.initDrag.bindAsEventListener(this);
288 Event.observe(this.handle, "mousedown", this.eventMouseDown);
290 Draggables.register(this);
293 destroy: function() {
294 Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
295 Draggables.unregister(this);
298 currentDelta: function() {
300 parseInt(Element.getStyle(this.element,'left') || '0'),
301 parseInt(Element.getStyle(this.element,'top') || '0')]);
304 initDrag: function(event) {
305 if(typeof Draggable._dragging[this.element] != 'undefined' &&
306 Draggable._dragging[this.element]) return;
307 if(Event.isLeftClick(event)) {
308 // abort on form elements, fixes a Firefox issue
309 var src = Event.element(event);
311 src.tagName=='INPUT' ||
312 src.tagName=='SELECT' ||
313 src.tagName=='OPTION' ||
314 src.tagName=='BUTTON' ||
315 src.tagName=='TEXTAREA')) return;
317 var pointer = [Event.pointerX(event), Event.pointerY(event)];
318 var pos = Position.cumulativeOffset(this.element);
319 this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
321 Draggables.activate(this);
326 startDrag: function(event) {
327 this.dragging = true;
329 if(this.options.zindex) {
330 this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
331 this.element.style.zIndex = this.options.zindex;
334 if(this.options.ghosting) {
335 this._clone = this.element.cloneNode(true);
336 Position.absolutize(this.element);
337 this.element.parentNode.insertBefore(this._clone, this.element);
340 if(this.options.scroll) {
341 if (this.options.scroll == window) {
342 var where = this._getWindowScroll(this.options.scroll);
343 this.originalScrollLeft = where.left;
344 this.originalScrollTop = where.top;
346 this.originalScrollLeft = this.options.scroll.scrollLeft;
347 this.originalScrollTop = this.options.scroll.scrollTop;
351 Draggables.notify('onStart', this, event);
353 if(this.options.starteffect) this.options.starteffect(this.element);
356 updateDrag: function(event, pointer) {
357 if(!this.dragging) this.startDrag(event);
359 Droppables.show(pointer, this.element);
360 Draggables.notify('onDrag', this, event);
363 if(this.options.change) this.options.change(this);
365 if(this.options.scroll) {
366 this.stopScrolling();
369 if (this.options.scroll == window) {
370 with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
372 p = Position.page(this.options.scroll);
373 p[0] += this.options.scroll.scrollLeft;
374 p[1] += this.options.scroll.scrollTop;
376 p[0] += (window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0);
377 p[1] += (window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0);
379 p.push(p[0]+this.options.scroll.offsetWidth);
380 p.push(p[1]+this.options.scroll.offsetHeight);
383 if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
384 if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
385 if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
386 if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
387 this.startScrolling(speed);
390 // fix AppleWebKit rendering
391 if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
396 finishDrag: function(event, success) {
397 this.dragging = false;
399 if(this.options.ghosting) {
400 Position.relativize(this.element);
401 Element.remove(this._clone);
405 if(success) Droppables.fire(event, this.element);
406 Draggables.notify('onEnd', this, event);
408 var revert = this.options.revert;
409 if(revert && typeof revert == 'function') revert = revert(this.element);
411 var d = this.currentDelta();
412 if(revert && this.options.reverteffect) {
413 this.options.reverteffect(this.element,
414 d[1]-this.delta[1], d[0]-this.delta[0]);
419 if(this.options.zindex)
420 this.element.style.zIndex = this.originalZ;
422 if(this.options.endeffect)
423 this.options.endeffect(this.element);
425 Draggables.deactivate(this);
429 keyPress: function(event) {
430 if(event.keyCode!=Event.KEY_ESC) return;
431 this.finishDrag(event, false);
435 endDrag: function(event) {
436 if(!this.dragging) return;
437 this.stopScrolling();
438 this.finishDrag(event, true);
442 draw: function(point) {
443 var pos = Position.cumulativeOffset(this.element);
444 if(this.options.ghosting) {
445 var r = Position.realOffset(this.element);
446 window.status = r.inspect();
447 pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY;
450 var d = this.currentDelta();
451 pos[0] -= d[0]; pos[1] -= d[1];
453 if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) {
454 pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
455 pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
458 var p = [0,1].map(function(i){
459 return (point[i]-pos[i]-this.offset[i])
462 if(this.options.snap) {
463 if(typeof this.options.snap == 'function') {
464 p = this.options.snap(p[0],p[1],this);
466 if(this.options.snap instanceof Array) {
467 p = p.map( function(v, i) {
468 return Math.round(v/this.options.snap[i])*this.options.snap[i] }.bind(this))
470 p = p.map( function(v) {
471 return Math.round(v/this.options.snap)*this.options.snap }.bind(this))
475 var style = this.element.style;
476 if((!this.options.constraint) || (this.options.constraint=='horizontal'))
477 style.left = p[0] + "px";
478 if((!this.options.constraint) || (this.options.constraint=='vertical'))
479 style.top = p[1] + "px";
481 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
484 stopScrolling: function() {
485 if(this.scrollInterval) {
486 clearInterval(this.scrollInterval);
487 this.scrollInterval = null;
488 Draggables._lastScrollPointer = null;
492 startScrolling: function(speed) {
493 if(!(speed[0] || speed[1])) return;
494 this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
495 this.lastScrolled = new Date();
496 this.scrollInterval = setInterval(this.scroll.bind(this), 10);
500 var current = new Date();
501 var delta = current - this.lastScrolled;
502 this.lastScrolled = current;
503 if(this.options.scroll == window) {
504 with (this._getWindowScroll(this.options.scroll)) {
505 if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
506 var d = delta / 1000;
507 this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
511 this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
512 this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000;
516 Droppables.show(Draggables._lastPointer, this.element);
517 Draggables.notify('onDrag', this);
518 if (this._isScrollChild) {
519 Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
520 Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
521 Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
522 if (Draggables._lastScrollPointer[0] < 0)
523 Draggables._lastScrollPointer[0] = 0;
524 if (Draggables._lastScrollPointer[1] < 0)
525 Draggables._lastScrollPointer[1] = 0;
526 this.draw(Draggables._lastScrollPointer);
529 if(this.options.change) this.options.change(this);
532 _getWindowScroll: function(w) {
535 if (w.document.documentElement && documentElement.scrollTop) {
536 T = documentElement.scrollTop;
537 L = documentElement.scrollLeft;
538 } else if (w.document.body) {
545 } else if (w.document.documentElement && documentElement.clientWidth) {
546 W = documentElement.clientWidth;
547 H = documentElement.clientHeight;
549 W = body.offsetWidth;
550 H = body.offsetHeight
553 return { top: T, left: L, width: W, height: H };
557 /*--------------------------------------------------------------------------*/
559 var SortableObserver = Class.create();
560 SortableObserver.prototype = {
561 initialize: function(element, observer) {
562 this.element = $(element);
563 this.observer = observer;
564 this.lastValue = Sortable.serialize(this.element);
567 onStart: function() {
568 this.lastValue = Sortable.serialize(this.element);
573 if(this.lastValue != Sortable.serialize(this.element))
574 this.observer(this.element)
579 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,
583 _findRootElement: function(element) {
584 while (element.tagName != "BODY") {
585 if(element.id && Sortable.sortables[element.id]) return element;
586 element = element.parentNode;
590 options: function(element) {
591 element = Sortable._findRootElement($(element));
593 return Sortable.sortables[element.id];
596 destroy: function(element){
597 var s = Sortable.options(element);
600 Draggables.removeObserver(s.element);
601 s.droppables.each(function(d){ Droppables.remove(d) });
602 s.draggables.invoke('destroy');
604 delete Sortable.sortables[s.element.id];
608 create: function(element) {
609 element = $(element);
610 var options = Object.extend({
612 tag: 'li', // assumes li children, override with tag: 'tagname'
616 overlap: 'vertical', // one of 'vertical', 'horizontal'
617 constraint: 'vertical', // one of 'vertical', 'horizontal', false
618 containment: element, // also takes array of elements (or id's); or false
619 handle: false, // or a CSS class
625 scrollSensitivity: 20,
627 format: this.SERIALIZE_RULE,
628 onChange: Prototype.emptyFunction,
629 onUpdate: Prototype.emptyFunction
630 }, arguments[1] || {});
632 // clear any old sortable with same element
633 this.destroy(element);
635 // build options for the draggables
636 var options_for_draggable = {
638 scroll: options.scroll,
639 scrollSpeed: options.scrollSpeed,
640 scrollSensitivity: options.scrollSensitivity,
641 delay: options.delay,
642 ghosting: options.ghosting,
643 constraint: options.constraint,
644 handle: options.handle };
646 if(options.starteffect)
647 options_for_draggable.starteffect = options.starteffect;
649 if(options.reverteffect)
650 options_for_draggable.reverteffect = options.reverteffect;
652 if(options.ghosting) options_for_draggable.reverteffect = function(element) {
653 element.style.top = 0;
654 element.style.left = 0;
657 if(options.endeffect)
658 options_for_draggable.endeffect = options.endeffect;
661 options_for_draggable.zindex = options.zindex;
663 // build options for the droppables
664 var options_for_droppable = {
665 overlap: options.overlap,
666 containment: options.containment,
668 hoverclass: options.hoverclass,
669 onHover: Sortable.onHover
670 //greedy: !options.dropOnEmpty
673 var options_for_tree = {
674 onHover: Sortable.onEmptyHover,
675 overlap: options.overlap,
676 containment: options.containment,
677 hoverclass: options.hoverclass
680 // fix for gecko engine
681 Element.cleanWhitespace(element);
683 options.draggables = [];
684 options.droppables = [];
686 // drop on empty handling
687 if(options.dropOnEmpty || options.tree) {
688 Droppables.add(element, options_for_tree);
689 options.droppables.push(element);
692 (this.findElements(element, options) || []).each( function(e) {
693 // handles are per-draggable
694 var handle = options.handle ?
695 Element.childrenWithClassName(e, options.handle)[0] : e;
696 options.draggables.push(
697 new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
698 Droppables.add(e, options_for_droppable);
699 if(options.tree) e.treeNode = element;
700 options.droppables.push(e);
704 (Sortable.findTreeElements(element, options) || []).each( function(e) {
705 Droppables.add(e, options_for_tree);
706 e.treeNode = element;
707 options.droppables.push(e);
712 this.sortables[element.id] = options;
715 Draggables.addObserver(new SortableObserver(element, options.onUpdate));
719 // return all suitable-for-sortable elements in a guaranteed order
720 findElements: function(element, options) {
721 return Element.findChildren(
722 element, options.only, options.tree ? true : false, options.tag);
725 findTreeElements: function(element, options) {
726 return Element.findChildren(
727 element, options.only, options.tree ? true : false, options.treeTag);
730 onHover: function(element, dropon, overlap) {
731 if(Element.isParent(dropon, element)) return;
733 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
735 } else if(overlap>0.5) {
736 Sortable.mark(dropon, 'before');
737 if(dropon.previousSibling != element) {
738 var oldParentNode = element.parentNode;
739 element.style.visibility = "hidden"; // fix gecko rendering
740 dropon.parentNode.insertBefore(element, dropon);
741 if(dropon.parentNode!=oldParentNode)
742 Sortable.options(oldParentNode).onChange(element);
743 Sortable.options(dropon.parentNode).onChange(element);
746 Sortable.mark(dropon, 'after');
747 var nextElement = dropon.nextSibling || null;
748 if(nextElement != element) {
749 var oldParentNode = element.parentNode;
750 element.style.visibility = "hidden"; // fix gecko rendering
751 dropon.parentNode.insertBefore(element, nextElement);
752 if(dropon.parentNode!=oldParentNode)
753 Sortable.options(oldParentNode).onChange(element);
754 Sortable.options(dropon.parentNode).onChange(element);
759 onEmptyHover: function(element, dropon, overlap) {
760 var oldParentNode = element.parentNode;
761 var droponOptions = Sortable.options(dropon);
763 if(!Element.isParent(dropon, element)) {
766 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only});
770 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);
772 for (index = 0; index < children.length; index += 1) {
773 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
774 offset -= Element.offsetSize (children[index], droponOptions.overlap);
775 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
776 child = index + 1 < children.length ? children[index + 1] : null;
779 child = children[index];
785 dropon.insertBefore(element, child);
787 Sortable.options(oldParentNode).onChange(element);
788 droponOptions.onChange(element);
793 if(Sortable._marker) Element.hide(Sortable._marker);
796 mark: function(dropon, position) {
797 // mark on ghosting only
798 var sortable = Sortable.options(dropon.parentNode);
799 if(sortable && !sortable.ghosting) return;
801 if(!Sortable._marker) {
802 Sortable._marker = $('dropmarker') || document.createElement('DIV');
803 Element.hide(Sortable._marker);
804 Element.addClassName(Sortable._marker, 'dropmarker');
805 Sortable._marker.style.position = 'absolute';
806 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
808 var offsets = Position.cumulativeOffset(dropon);
809 Sortable._marker.style.left = offsets[0] + 'px';
810 Sortable._marker.style.top = offsets[1] + 'px';
812 if(position=='after')
813 if(sortable.overlap == 'horizontal')
814 Sortable._marker.style.left = (offsets[0]+dropon.clientWidth) + 'px';
816 Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px';
818 Element.show(Sortable._marker);
821 _tree: function(element, options, parent) {
822 var children = Sortable.findElements(element, options) || [];
824 for (var i = 0; i < children.length; ++i) {
825 var match = children[i].id.match(options.format);
827 if (!match) continue;
830 id: encodeURIComponent(match ? match[1] : null),
834 position: parent.children.length,
835 container: Sortable._findChildrenElement(children[i], options.treeTag.toUpperCase())
838 /* Get the element containing the children and recurse over it */
840 this._tree(child.container, options, child)
842 parent.children.push (child);
848 /* Finds the first element of the given tag type within a parent element.
849 Used for finding the first LI[ST] within a L[IST]I[TEM].*/
850 _findChildrenElement: function (element, containerTag) {
851 if (element && element.hasChildNodes)
852 for (var i = 0; i < element.childNodes.length; ++i)
853 if (element.childNodes[i].tagName == containerTag)
854 return element.childNodes[i];
859 tree: function(element) {
860 element = $(element);
861 var sortableOptions = this.options(element);
862 var options = Object.extend({
863 tag: sortableOptions.tag,
864 treeTag: sortableOptions.treeTag,
865 only: sortableOptions.only,
867 format: sortableOptions.format
868 }, arguments[1] || {});
878 return Sortable._tree (element, options, root);
881 /* Construct a [i] index for a particular node */
882 _constructIndex: function(node) {
885 if (node.id) index = '[' + node.position + ']' + index;
886 } while ((node = node.parent) != null);
890 sequence: function(element) {
891 element = $(element);
892 var options = Object.extend(this.options(element), arguments[1] || {});
894 return $(this.findElements(element, options) || []).map( function(item) {
895 return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
899 setSequence: function(element, new_sequence) {
900 element = $(element);
901 var options = Object.extend(this.options(element), arguments[2] || {});
904 this.findElements(element, options).each( function(n) {
905 if (n.id.match(options.format))
906 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
907 n.parentNode.removeChild(n);
910 new_sequence.each(function(ident) {
911 var n = nodeMap[ident];
913 n[1].appendChild(n[0]);
914 delete nodeMap[ident];
919 serialize: function(element) {
920 element = $(element);
921 var options = Object.extend(Sortable.options(element), arguments[1] || {});
922 var name = encodeURIComponent(
923 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);
926 return Sortable.tree(element, arguments[1]).children.map( function (item) {
927 return [name + Sortable._constructIndex(item) + "[id]=" +
928 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
929 }).flatten().join('&');
931 return Sortable.sequence(element, arguments[1]).map( function(item) {
932 return name + "[]=" + encodeURIComponent(item);
938 /* Returns true if child is contained within element */
939 Element.isParent = function(child, element) {
940 if (!child.parentNode || child == element) return false;
942 if (child.parentNode == element) return true;
944 return Element.isParent(child.parentNode, element);
947 Element.findChildren = function(element, only, recursive, tagName) {
948 if(!element.hasChildNodes()) return null;
949 tagName = tagName.toUpperCase();
950 if(only) only = [only].flatten();
952 $A(element.childNodes).each( function(e) {
953 if(e.tagName && e.tagName.toUpperCase()==tagName &&
954 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
957 var grandchildren = Element.findChildren(e, only, recursive, tagName);
958 if(grandchildren) elements.push(grandchildren);
962 return (elements.length>0 ? elements.flatten() : []);
965 Element.offsetSize = function (element, type) {
966 if (type == 'vertical' || type == 'height')
967 return element.offsetHeight;
969 return element.offsetWidth;