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Diffstat (limited to 'root/js/dragdrop.js')
| -rw-r--r-- | root/js/dragdrop.js | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/root/js/dragdrop.js b/root/js/dragdrop.js new file mode 100644 index 0000000..7ca95f6 --- /dev/null +++ b/root/js/dragdrop.js @@ -0,0 +1,519 @@ +// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) +// +// Element.Class part Copyright (c) 2005 by Rick Olson +// +// See scriptaculous.js for full license. + +/*--------------------------------------------------------------------------*/ + +var Droppables = { + drops: [], + + remove: function(element) { + this.drops = this.drops.reject(function(d) { return d.element==element }); + }, + + add: function(element) { + element = $(element); + var options = Object.extend({ + greedy: true, + hoverclass: null + }, arguments[1] || {}); + + // cache containers + if(options.containment) { + options._containers = []; + var containment = options.containment; + if((typeof containment == 'object') && + (containment.constructor == Array)) { + containment.each( function(c) { options._containers.push($(c)) }); + } else { + options._containers.push($(containment)); + } + } + + Element.makePositioned(element); // fix IE + options.element = element; + + this.drops.push(options); + }, + + isContained: function(element, drop) { + var parentNode = element.parentNode; + return drop._containers.detect(function(c) { return parentNode == c }); + }, + + isAffected: function(pX, pY, element, drop) { + return ( + (drop.element!=element) && + ((!drop._containers) || + this.isContained(element, drop)) && + ((!drop.accept) || + (Element.Class.has_any(element, drop.accept))) && + Position.within(drop.element, pX, pY) ); + }, + + deactivate: function(drop) { + if(drop.hoverclass) + Element.Class.remove(drop.element, drop.hoverclass); + this.last_active = null; + }, + + activate: function(drop) { + if(this.last_active) this.deactivate(this.last_active); + if(drop.hoverclass) + Element.Class.add(drop.element, drop.hoverclass); + this.last_active = drop; + }, + + show: function(event, element) { + if(!this.drops.length) return; + var pX = Event.pointerX(event); + var pY = Event.pointerY(event); + Position.prepare(); + + var i = this.drops.length-1; do { + var drop = this.drops[i]; + if(this.isAffected(pX, pY, element, drop)) { + if(drop.onHover) + drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); + if(drop.greedy) { + this.activate(drop); + return; + } + } + } while (i--); + + if(this.last_active) this.deactivate(this.last_active); + }, + + fire: function(event, element) { + if(!this.last_active) return; + Position.prepare(); + + if (this.isAffected(Event.pointerX(event), Event.pointerY(event), element, this.last_active)) + if (this.last_active.onDrop) + this.last_active.onDrop(element, this.last_active.element, event); + }, + + reset: function() { + if(this.last_active) + this.deactivate(this.last_active); + } +} + +var Draggables = { + observers: [], + addObserver: function(observer) { + this.observers.push(observer); + }, + removeObserver: function(element) { // element instead of obsever fixes mem leaks + this.observers = this.observers.reject( function(o) { return o.element==element }); + }, + notify: function(eventName, draggable) { // 'onStart', 'onEnd' + this.observers.invoke(eventName, draggable); + } +} + +/*--------------------------------------------------------------------------*/ + +var Draggable = Class.create(); +Draggable.prototype = { + initialize: function(element) { + var options = Object.extend({ + handle: false, + starteffect: function(element) { + new Effect.Opacity(element, {duration:0.2, from:1.0, to:0.7}); + }, + reverteffect: function(element, top_offset, left_offset) { + var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; + new Effect.MoveBy(element, -top_offset, -left_offset, {duration:dur}); + }, + endeffect: function(element) { + new Effect.Opacity(element, {duration:0.2, from:0.7, to:1.0}); + }, + zindex: 1000, + revert: false + }, arguments[1] || {}); + + this.element = $(element); + if(options.handle && (typeof options.handle == 'string')) + this.handle = Element.Class.childrenWith(this.element, options.handle)[0]; + + if(!this.handle) this.handle = $(options.handle); + if(!this.handle) this.handle = this.element; + + Element.makePositioned(this.element); // fix IE + + this.offsetX = 0; + this.offsetY = 0; + this.originalLeft = this.currentLeft(); + this.originalTop = this.currentTop(); + this.originalX = this.element.offsetLeft; + this.originalY = this.element.offsetTop; + + this.options = options; + + this.active = false; + this.dragging = false; + + this.eventMouseDown = this.startDrag.bindAsEventListener(this); + this.eventMouseUp = this.endDrag.bindAsEventListener(this); + this.eventMouseMove = this.update.bindAsEventListener(this); + this.eventKeypress = this.keyPress.bindAsEventListener(this); + + this.registerEvents(); + }, + destroy: function() { + Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); + this.unregisterEvents(); + }, + registerEvents: function() { + Event.observe(document, "mouseup", this.eventMouseUp); + Event.observe(document, "mousemove", this.eventMouseMove); + Event.observe(document, "keypress", this.eventKeypress); + Event.observe(this.handle, "mousedown", this.eventMouseDown); + }, + unregisterEvents: function() { + //if(!this.active) return; + //Event.stopObserving(document, "mouseup", this.eventMouseUp); + //Event.stopObserving(document, "mousemove", this.eventMouseMove); + //Event.stopObserving(document, "keypress", this.eventKeypress); + }, + currentLeft: function() { + return parseInt(this.element.style.left || '0'); + }, + currentTop: function() { + return parseInt(this.element.style.top || '0') + }, + startDrag: function(event) { + if(Event.isLeftClick(event)) { + + // abort on form elements, fixes a Firefox issue + var src = Event.element(event); + if(src.tagName && ( + src.tagName=='INPUT' || + src.tagName=='SELECT' || + src.tagName=='BUTTON' || + src.tagName=='TEXTAREA')) return; + + // this.registerEvents(); + this.active = true; + var pointer = [Event.pointerX(event), Event.pointerY(event)]; + var offsets = Position.cumulativeOffset(this.element); + this.offsetX = (pointer[0] - offsets[0]); + this.offsetY = (pointer[1] - offsets[1]); + Event.stop(event); + } + }, + finishDrag: function(event, success) { + // this.unregisterEvents(); + + this.active = false; + this.dragging = false; + + if(this.options.ghosting) { + Position.relativize(this.element); + Element.remove(this._clone); + this._clone = null; + } + + if(success) Droppables.fire(event, this.element); + Draggables.notify('onEnd', this); + + var revert = this.options.revert; + if(revert && typeof revert == 'function') revert = revert(this.element); + + if(revert && this.options.reverteffect) { + this.options.reverteffect(this.element, + this.currentTop()-this.originalTop, + this.currentLeft()-this.originalLeft); + } else { + this.originalLeft = this.currentLeft(); + this.originalTop = this.currentTop(); + } + + if(this.options.zindex) + this.element.style.zIndex = this.originalZ; + + if(this.options.endeffect) + this.options.endeffect(this.element); + + + Droppables.reset(); + }, + keyPress: function(event) { + if(this.active) { + if(event.keyCode==Event.KEY_ESC) { + this.finishDrag(event, false); + Event.stop(event); + } + } + }, + endDrag: function(event) { + if(this.active && this.dragging) { + this.finishDrag(event, true); + Event.stop(event); + } + this.active = false; + this.dragging = false; + }, + draw: function(event) { + var pointer = [Event.pointerX(event), Event.pointerY(event)]; + var offsets = Position.cumulativeOffset(this.element); + offsets[0] -= this.currentLeft(); + offsets[1] -= this.currentTop(); + var style = this.element.style; + if((!this.options.constraint) || (this.options.constraint=='horizontal')) + style.left = (pointer[0] - offsets[0] - this.offsetX) + "px"; + if((!this.options.constraint) || (this.options.constraint=='vertical')) + style.top = (pointer[1] - offsets[1] - this.offsetY) + "px"; + if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering + }, + update: function(event) { + if(this.active) { + if(!this.dragging) { + var style = this.element.style; + this.dragging = true; + + if(Element.getStyle(this.element,'position')=='') + style.position = "relative"; + + if(this.options.zindex) { + this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0); + style.zIndex = this.options.zindex; + } + + if(this.options.ghosting) { + this._clone = this.element.cloneNode(true); + Position.absolutize(this.element); + this.element.parentNode.insertBefore(this._clone, this.element); + } + + Draggables.notify('onStart', this); + if(this.options.starteffect) this.options.starteffect(this.element); + } + + Droppables.show(event, this.element); + this.draw(event); + if(this.options.change) this.options.change(this); + + // fix AppleWebKit rendering + if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0); + + Event.stop(event); + } + } +} + +/*--------------------------------------------------------------------------*/ + +var SortableObserver = Class.create(); +SortableObserver.prototype = { + initialize: function(element, observer) { + this.element = $(element); + this.observer = observer; + this.lastValue = Sortable.serialize(this.element); + }, + onStart: function() { + this.lastValue = Sortable.serialize(this.element); + }, + onEnd: function() { + Sortable.unmark(); + if(this.lastValue != Sortable.serialize(this.element)) + this.observer(this.element) + } +} + +var Sortable = { + sortables: new Array(), + options: function(element){ + element = $(element); + return this.sortables.detect(function(s) { return s.element == element }); + }, + destroy: function(element){ + element = $(element); + this.sortables.findAll(function(s) { return s.element == element }).each(function(s){ + Draggables.removeObserver(s.element); + s.droppables.each(function(d){ Droppables.remove(d) }); + s.draggables.invoke('destroy'); + }); + this.sortables = this.sortables.reject(function(s) { return s.element == element }); + }, + create: function(element) { + element = $(element); + var options = Object.extend({ + element: element, + tag: 'li', // assumes li children, override with tag: 'tagname' + dropOnEmpty: false, + tree: false, // fixme: unimplemented + overlap: 'vertical', // one of 'vertical', 'horizontal' + constraint: 'vertical', // one of 'vertical', 'horizontal', false + containment: element, // also takes array of elements (or id's); or false + handle: false, // or a CSS class + only: false, + hoverclass: null, + ghosting: false, + format: null, + onChange: Prototype.emptyFunction, + onUpdate: Prototype.emptyFunction + }, arguments[1] || {}); + + // clear any old sortable with same element + this.destroy(element); + + // build options for the draggables + var options_for_draggable = { + revert: true, + ghosting: options.ghosting, + constraint: options.constraint, + handle: options.handle }; + + if(options.starteffect) + options_for_draggable.starteffect = options.starteffect; + + if(options.reverteffect) + options_for_draggable.reverteffect = options.reverteffect; + else + if(options.ghosting) options_for_draggable.reverteffect = function(element) { + element.style.top = 0; + element.style.left = 0; + }; + + if(options.endeffect) + options_for_draggable.endeffect = options.endeffect; + + if(options.zindex) + options_for_draggable.zindex = options.zindex; + + // build options for the droppables + var options_for_droppable = { + overlap: options.overlap, + containment: options.containment, + hoverclass: options.hoverclass, + onHover: Sortable.onHover, + greedy: !options.dropOnEmpty + } + + // fix for gecko engine + Element.cleanWhitespace(element); + + options.draggables = []; + options.droppables = []; + + // make it so + + // drop on empty handling + if(options.dropOnEmpty) { + Droppables.add(element, + {containment: options.containment, onHover: Sortable.onEmptyHover, greedy: false}); + options.droppables.push(element); + } + + (this.findElements(element, options) || []).each( function(e) { + // handles are per-draggable + var handle = options.handle ? + Element.Class.childrenWith(e, options.handle)[0] : e; + options.draggables.push( + new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); + Droppables.add(e, options_for_droppable); + options.droppables.push(e); + }); + + // keep reference + this.sortables.push(options); + + // for onupdate + Draggables.addObserver(new SortableObserver(element, options.onUpdate)); + + }, + + // return all suitable-for-sortable elements in a guaranteed order + findElements: function(element, options) { + if(!element.hasChildNodes()) return null; + var elements = []; + $A(element.childNodes).each( function(e) { + if(e.tagName && e.tagName==options.tag.toUpperCase() && + (!options.only || (Element.Class.has(e, options.only)))) + elements.push(e); + if(options.tree) { + var grandchildren = this.findElements(e, options); + if(grandchildren) elements.push(grandchildren); + } + }); + + return (elements.length>0 ? elements.flatten() : null); + }, + + onHover: function(element, dropon, overlap) { + if(overlap>0.5) { + Sortable.mark(dropon, 'before'); + if(dropon.previousSibling != element) { + var oldParentNode = element.parentNode; + element.style.visibility = "hidden"; // fix gecko rendering + dropon.parentNode.insertBefore(element, dropon); + if(dropon.parentNode!=oldParentNode) + Sortable.options(oldParentNode).onChange(element); + Sortable.options(dropon.parentNode).onChange(element); + } + } else { + Sortable.mark(dropon, 'after'); + var nextElement = dropon.nextSibling || null; + if(nextElement != element) { + var oldParentNode = element.parentNode; + element.style.visibility = "hidden"; // fix gecko rendering + dropon.parentNode.insertBefore(element, nextElement); + if(dropon.parentNode!=oldParentNode) + Sortable.options(oldParentNode).onChange(element); + Sortable.options(dropon.parentNode).onChange(element); + } + } + }, + + onEmptyHover: function(element, dropon) { + if(element.parentNode!=dropon) { + var oldParentNode = element.parentNode; + dropon.appendChild(element); + Sortable.options(oldParentNode).onChange(element); + Sortable.options(dropon).onChange(element); + } + }, + + unmark: function() { + if(Sortable._marker) Element.hide(Sortable._marker); + }, + + mark: function(dropon, position) { + // mark on ghosting only + var sortable = Sortable.options(dropon.parentNode); + if(sortable && !sortable.ghosting) return; + + if(!Sortable._marker) { + Sortable._marker = $('dropmarker') || document.createElement('DIV'); + Element.hide(Sortable._marker); + Element.Class.add(Sortable._marker, 'dropmarker'); + Sortable._marker.style.position = 'absolute'; + document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); + } + var offsets = Position.cumulativeOffset(dropon); + Sortable._marker.style.top = offsets[1] + 'px'; + if(position=='after') Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px'; + Sortable._marker.style.left = offsets[0] + 'px'; + Element.show(Sortable._marker); + }, + + serialize: function(element) { + element = $(element); + var sortableOptions = this.options(element); + var options = Object.extend({ + tag: sortableOptions.tag, + only: sortableOptions.only, + name: element.id, + format: sortableOptions.format || /^[^_]*_(.*)$/ + }, arguments[1] || {}); + return $(this.findElements(element, options) || []).collect( function(item) { + return (encodeURIComponent(options.name) + "[]=" + + encodeURIComponent(item.id.match(options.format) ? item.id.match(options.format)[1] : '')); + }).join("&"); + } +}
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