[1] | 1 | // Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us) |
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| 2 | // |
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| 3 | // See scriptaculous.js for full license. |
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| 4 | |
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| 5 | /*--------------------------------------------------------------------------*/ |
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| 6 | |
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| 7 | var Droppables = { |
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| 8 | drops: [], |
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| 9 | |
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| 10 | remove: function(element) { |
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| 11 | this.drops = this.drops.reject(function(d) { return d.element==$(element) }); |
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| 12 | }, |
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| 13 | |
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| 14 | add: function(element) { |
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| 15 | element = $(element); |
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| 16 | var options = Object.extend({ |
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| 17 | greedy: true, |
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| 18 | hoverclass: null |
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| 19 | }, arguments[1] || {}); |
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| 20 | |
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| 21 | // cache containers |
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| 22 | if(options.containment) { |
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| 23 | options._containers = []; |
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| 24 | var containment = options.containment; |
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| 25 | if((typeof containment == 'object') && |
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| 26 | (containment.constructor == Array)) { |
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| 27 | containment.each( function(c) { options._containers.push($(c)) }); |
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| 28 | } else { |
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| 29 | options._containers.push($(containment)); |
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| 30 | } |
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| 31 | } |
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| 32 | |
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| 33 | if(options.accept) options.accept = [options.accept].flatten(); |
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| 34 | |
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| 35 | Element.makePositioned(element); // fix IE |
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| 36 | options.element = element; |
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| 37 | |
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| 38 | this.drops.push(options); |
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| 39 | }, |
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| 40 | |
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| 41 | isContained: function(element, drop) { |
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| 42 | var parentNode = element.parentNode; |
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| 43 | return drop._containers.detect(function(c) { return parentNode == c }); |
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| 44 | }, |
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| 45 | |
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| 46 | isAffected: function(pX, pY, element, drop) { |
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| 47 | return ( |
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| 48 | (drop.element!=element) && |
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| 49 | ((!drop._containers) || |
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| 50 | this.isContained(element, drop)) && |
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| 51 | ((!drop.accept) || |
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| 52 | (Element.classNames(element).detect( |
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| 53 | function(v) { return drop.accept.include(v) } ) )) && |
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| 54 | Position.within(drop.element, pX, pY) ); |
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| 55 | }, |
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| 56 | |
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| 57 | deactivate: function(drop) { |
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| 58 | if(drop.hoverclass) |
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| 59 | Element.removeClassName(drop.element, drop.hoverclass); |
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| 60 | this.last_active = null; |
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| 61 | }, |
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| 62 | |
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| 63 | activate: function(drop) { |
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| 64 | if(this.last_active) this.deactivate(this.last_active); |
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| 65 | if(drop.hoverclass) |
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| 66 | Element.addClassName(drop.element, drop.hoverclass); |
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| 67 | this.last_active = drop; |
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| 68 | }, |
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| 69 | |
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| 70 | show: function(event, element) { |
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| 71 | if(!this.drops.length) return; |
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| 72 | var pX = Event.pointerX(event); |
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| 73 | var pY = Event.pointerY(event); |
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| 74 | Position.prepare(); |
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| 75 | |
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| 76 | var i = this.drops.length-1; do { |
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| 77 | var drop = this.drops[i]; |
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| 78 | if(this.isAffected(pX, pY, element, drop)) { |
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| 79 | if(drop.onHover) |
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| 80 | drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); |
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| 81 | if(drop.greedy) { |
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| 82 | this.activate(drop); |
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| 83 | return; |
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| 84 | } |
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| 85 | } |
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| 86 | } while (i--); |
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| 87 | |
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| 88 | if(this.last_active) this.deactivate(this.last_active); |
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| 89 | }, |
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| 90 | |
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| 91 | fire: function(event, element) { |
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| 92 | if(!this.last_active) return; |
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| 93 | Position.prepare(); |
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| 94 | |
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| 95 | if (this.isAffected(Event.pointerX(event), Event.pointerY(event), element, this.last_active)) |
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| 96 | if (this.last_active.onDrop) |
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| 97 | this.last_active.onDrop(element, this.last_active.element, event); |
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| 98 | }, |
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| 99 | |
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| 100 | reset: function() { |
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| 101 | if(this.last_active) |
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| 102 | this.deactivate(this.last_active); |
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| 103 | } |
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| 104 | } |
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| 105 | |
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| 106 | var Draggables = { |
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| 107 | observers: [], |
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| 108 | addObserver: function(observer) { |
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| 109 | this.observers.push(observer); |
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| 110 | this._cacheObserverCallbacks(); |
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| 111 | }, |
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| 112 | removeObserver: function(element) { // element instead of observer fixes mem leaks |
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| 113 | this.observers = this.observers.reject( function(o) { return o.element==element }); |
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| 114 | this._cacheObserverCallbacks(); |
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| 115 | }, |
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| 116 | notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag' |
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| 117 | if(this[eventName+'Count'] > 0) |
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| 118 | this.observers.each( function(o) { |
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| 119 | if(o[eventName]) o[eventName](eventName, draggable, event); |
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| 120 | }); |
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| 121 | }, |
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| 122 | _cacheObserverCallbacks: function() { |
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| 123 | ['onStart','onEnd','onDrag'].each( function(eventName) { |
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| 124 | Draggables[eventName+'Count'] = Draggables.observers.select( |
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| 125 | function(o) { return o[eventName]; } |
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| 126 | ).length; |
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| 127 | }); |
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| 128 | } |
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| 129 | } |
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| 130 | |
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| 131 | /*--------------------------------------------------------------------------*/ |
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| 132 | |
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| 133 | var Draggable = Class.create(); |
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| 134 | Draggable.prototype = { |
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| 135 | initialize: function(element) { |
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| 136 | var options = Object.extend({ |
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| 137 | handle: false, |
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| 138 | starteffect: function(element) { |
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| 139 | new Effect.Opacity(element, {duration:0.2, from:1.0, to:0.7}); |
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| 140 | }, |
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| 141 | reverteffect: function(element, top_offset, left_offset) { |
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| 142 | var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; |
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| 143 | new Effect.MoveBy(element, -top_offset, -left_offset, {duration:dur}); |
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| 144 | }, |
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| 145 | endeffect: function(element) { |
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| 146 | new Effect.Opacity(element, {duration:0.2, from:0.7, to:1.0}); |
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| 147 | }, |
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| 148 | zindex: 1000, |
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| 149 | revert: false, |
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| 150 | snap: false // false, or xy or [x,y] or function(x,y){ return [x,y] } |
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| 151 | }, arguments[1] || {}); |
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| 152 | |
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| 153 | this.element = $(element); |
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| 154 | if(options.handle && (typeof options.handle == 'string')) |
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| 155 | this.handle = Element.childrenWithClassName(this.element, options.handle)[0]; |
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| 156 | |
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| 157 | if(!this.handle) this.handle = $(options.handle); |
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| 158 | if(!this.handle) this.handle = this.element; |
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| 159 | |
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| 160 | Element.makePositioned(this.element); // fix IE |
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| 161 | |
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| 162 | this.offsetX = 0; |
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| 163 | this.offsetY = 0; |
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| 164 | this.originalLeft = this.currentLeft(); |
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| 165 | this.originalTop = this.currentTop(); |
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| 166 | this.originalX = this.element.offsetLeft; |
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| 167 | this.originalY = this.element.offsetTop; |
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| 168 | |
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| 169 | this.options = options; |
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| 170 | |
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| 171 | this.active = false; |
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| 172 | this.dragging = false; |
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| 173 | |
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| 174 | this.eventMouseDown = this.startDrag.bindAsEventListener(this); |
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| 175 | this.eventMouseUp = this.endDrag.bindAsEventListener(this); |
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| 176 | this.eventMouseMove = this.update.bindAsEventListener(this); |
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| 177 | this.eventKeypress = this.keyPress.bindAsEventListener(this); |
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| 178 | |
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| 179 | this.registerEvents(); |
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| 180 | }, |
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| 181 | destroy: function() { |
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| 182 | Event.stopObserving(this.handle, "mousedown", this.eventMouseDown); |
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| 183 | this.unregisterEvents(); |
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| 184 | }, |
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| 185 | registerEvents: function() { |
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| 186 | Event.observe(document, "mouseup", this.eventMouseUp); |
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| 187 | Event.observe(document, "mousemove", this.eventMouseMove); |
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| 188 | Event.observe(document, "keypress", this.eventKeypress); |
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| 189 | Event.observe(this.handle, "mousedown", this.eventMouseDown); |
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| 190 | }, |
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| 191 | unregisterEvents: function() { |
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| 192 | //if(!this.active) return; |
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| 193 | //Event.stopObserving(document, "mouseup", this.eventMouseUp); |
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| 194 | //Event.stopObserving(document, "mousemove", this.eventMouseMove); |
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| 195 | //Event.stopObserving(document, "keypress", this.eventKeypress); |
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| 196 | }, |
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| 197 | currentLeft: function() { |
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| 198 | return parseInt(this.element.style.left || '0'); |
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| 199 | }, |
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| 200 | currentTop: function() { |
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| 201 | return parseInt(this.element.style.top || '0') |
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| 202 | }, |
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| 203 | startDrag: function(event) { |
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| 204 | if(Event.isLeftClick(event)) { |
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| 205 | |
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| 206 | // abort on form elements, fixes a Firefox issue |
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| 207 | var src = Event.element(event); |
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| 208 | if(src.tagName && ( |
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| 209 | src.tagName=='INPUT' || |
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| 210 | src.tagName=='SELECT' || |
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| 211 | src.tagName=='BUTTON' || |
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| 212 | src.tagName=='TEXTAREA')) return; |
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| 213 | |
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| 214 | // this.registerEvents(); |
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| 215 | this.active = true; |
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| 216 | var pointer = [Event.pointerX(event), Event.pointerY(event)]; |
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| 217 | var offsets = Position.cumulativeOffset(this.element); |
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| 218 | this.offsetX = (pointer[0] - offsets[0]); |
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| 219 | this.offsetY = (pointer[1] - offsets[1]); |
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| 220 | Event.stop(event); |
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| 221 | } |
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| 222 | }, |
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| 223 | finishDrag: function(event, success) { |
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| 224 | // this.unregisterEvents(); |
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| 225 | |
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| 226 | this.active = false; |
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| 227 | this.dragging = false; |
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| 228 | |
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| 229 | if(this.options.ghosting) { |
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| 230 | Position.relativize(this.element); |
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| 231 | Element.remove(this._clone); |
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| 232 | this._clone = null; |
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| 233 | } |
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| 234 | |
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| 235 | if(success) Droppables.fire(event, this.element); |
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| 236 | Draggables.notify('onEnd', this, event); |
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| 237 | |
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| 238 | var revert = this.options.revert; |
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| 239 | if(revert && typeof revert == 'function') revert = revert(this.element); |
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| 240 | |
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| 241 | if(revert && this.options.reverteffect) { |
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| 242 | this.options.reverteffect(this.element, |
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| 243 | this.currentTop()-this.originalTop, |
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| 244 | this.currentLeft()-this.originalLeft); |
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| 245 | } else { |
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| 246 | this.originalLeft = this.currentLeft(); |
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| 247 | this.originalTop = this.currentTop(); |
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| 248 | } |
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| 249 | |
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| 250 | if(this.options.zindex) |
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| 251 | this.element.style.zIndex = this.originalZ; |
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| 252 | |
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| 253 | if(this.options.endeffect) |
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| 254 | this.options.endeffect(this.element); |
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| 255 | |
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| 256 | |
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| 257 | Droppables.reset(); |
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| 258 | }, |
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| 259 | keyPress: function(event) { |
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| 260 | if(this.active) { |
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| 261 | if(event.keyCode==Event.KEY_ESC) { |
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| 262 | this.finishDrag(event, false); |
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| 263 | Event.stop(event); |
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| 264 | } |
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| 265 | } |
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| 266 | }, |
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| 267 | endDrag: function(event) { |
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| 268 | if(this.active && this.dragging) { |
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| 269 | this.finishDrag(event, true); |
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| 270 | Event.stop(event); |
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| 271 | } |
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| 272 | this.active = false; |
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| 273 | this.dragging = false; |
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| 274 | }, |
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| 275 | draw: function(event) { |
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| 276 | var pointer = [Event.pointerX(event), Event.pointerY(event)]; |
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| 277 | var offsets = Position.cumulativeOffset(this.element); |
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| 278 | offsets[0] -= this.currentLeft(); |
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| 279 | offsets[1] -= this.currentTop(); |
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| 280 | var style = this.element.style; |
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| 281 | |
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| 282 | var pos = [ |
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| 283 | (pointer[0] - offsets[0] - this.offsetX), |
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| 284 | (pointer[1] - offsets[1] - this.offsetY)]; |
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| 285 | |
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| 286 | if(this.options.snap) { |
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| 287 | if(typeof this.options.snap == 'function') { |
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| 288 | pos = this.options.snap(pos[0],pos[1]); |
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| 289 | } else { |
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| 290 | var draggable = this; |
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| 291 | if(this.options.snap instanceof Array) { |
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| 292 | pos = pos.collect( function(v, i) { |
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| 293 | return Math.round(v/draggable.options.snap[i])*draggable.options.snap[i] }) |
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| 294 | } else { |
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| 295 | pos = pos.collect( function(v) { |
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| 296 | return Math.round(v/draggable.options.snap)*draggable.options.snap }) |
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| 297 | } |
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| 298 | }} |
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| 299 | |
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| 300 | if((!this.options.constraint) || (this.options.constraint=='horizontal')) |
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| 301 | style.left = pos[0] + "px"; |
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| 302 | if((!this.options.constraint) || (this.options.constraint=='vertical')) |
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| 303 | style.top = pos[1] + "px"; |
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| 304 | if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering |
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| 305 | }, |
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| 306 | update: function(event) { |
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| 307 | if(this.active) { |
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| 308 | if(!this.dragging) { |
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| 309 | var style = this.element.style; |
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| 310 | this.dragging = true; |
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| 311 | |
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| 312 | if(Element.getStyle(this.element,'position')=='') |
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| 313 | style.position = "relative"; |
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| 314 | |
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| 315 | if(this.options.zindex) { |
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| 316 | this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0); |
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| 317 | style.zIndex = this.options.zindex; |
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| 318 | } |
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| 319 | |
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| 320 | if(this.options.ghosting) { |
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| 321 | this._clone = this.element.cloneNode(true); |
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| 322 | Position.absolutize(this.element); |
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| 323 | this.element.parentNode.insertBefore(this._clone, this.element); |
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| 324 | } |
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| 325 | |
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| 326 | Draggables.notify('onStart', this, event); |
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| 327 | if(this.options.starteffect) this.options.starteffect(this.element); |
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| 328 | } |
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| 329 | |
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| 330 | Droppables.show(event, this.element); |
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| 331 | Draggables.notify('onDrag', this, event); |
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| 332 | this.draw(event); |
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| 333 | if(this.options.change) this.options.change(this); |
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| 334 | |
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| 335 | // fix AppleWebKit rendering |
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| 336 | if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0); |
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| 337 | |
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| 338 | Event.stop(event); |
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| 339 | } |
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| 340 | } |
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| 341 | } |
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| 342 | |
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| 343 | /*--------------------------------------------------------------------------*/ |
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| 344 | |
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| 345 | var SortableObserver = Class.create(); |
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| 346 | SortableObserver.prototype = { |
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| 347 | initialize: function(element, observer) { |
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| 348 | this.element = $(element); |
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| 349 | this.observer = observer; |
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| 350 | this.lastValue = Sortable.serialize(this.element); |
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| 351 | }, |
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| 352 | onStart: function() { |
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| 353 | this.lastValue = Sortable.serialize(this.element); |
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| 354 | }, |
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| 355 | onEnd: function() { |
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| 356 | Sortable.unmark(); |
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| 357 | if(this.lastValue != Sortable.serialize(this.element)) |
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| 358 | this.observer(this.element) |
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| 359 | } |
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| 360 | } |
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| 361 | |
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| 362 | var Sortable = { |
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| 363 | sortables: new Array(), |
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| 364 | options: function(element){ |
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| 365 | element = $(element); |
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| 366 | return this.sortables.detect(function(s) { return s.element == element }); |
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| 367 | }, |
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| 368 | destroy: function(element){ |
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| 369 | element = $(element); |
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| 370 | this.sortables.findAll(function(s) { return s.element == element }).each(function(s){ |
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| 371 | Draggables.removeObserver(s.element); |
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| 372 | s.droppables.each(function(d){ Droppables.remove(d) }); |
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| 373 | s.draggables.invoke('destroy'); |
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| 374 | }); |
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| 375 | this.sortables = this.sortables.reject(function(s) { return s.element == element }); |
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| 376 | }, |
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| 377 | create: function(element) { |
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| 378 | element = $(element); |
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| 379 | var options = Object.extend({ |
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| 380 | element: element, |
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| 381 | tag: 'li', // assumes li children, override with tag: 'tagname' |
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| 382 | dropOnEmpty: false, |
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| 383 | tree: false, // fixme: unimplemented |
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| 384 | overlap: 'vertical', // one of 'vertical', 'horizontal' |
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| 385 | constraint: 'vertical', // one of 'vertical', 'horizontal', false |
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| 386 | containment: element, // also takes array of elements (or id's); or false |
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| 387 | handle: false, // or a CSS class |
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| 388 | only: false, |
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| 389 | hoverclass: null, |
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| 390 | ghosting: false, |
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| 391 | format: null, |
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| 392 | onChange: Prototype.emptyFunction, |
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| 393 | onUpdate: Prototype.emptyFunction |
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| 394 | }, arguments[1] || {}); |
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| 395 | |
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| 396 | // clear any old sortable with same element |
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| 397 | this.destroy(element); |
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| 398 | |
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| 399 | // build options for the draggables |
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| 400 | var options_for_draggable = { |
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| 401 | revert: true, |
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| 402 | ghosting: options.ghosting, |
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| 403 | constraint: options.constraint, |
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| 404 | handle: options.handle }; |
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| 405 | |
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| 406 | if(options.starteffect) |
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| 407 | options_for_draggable.starteffect = options.starteffect; |
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| 408 | |
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| 409 | if(options.reverteffect) |
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| 410 | options_for_draggable.reverteffect = options.reverteffect; |
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| 411 | else |
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| 412 | if(options.ghosting) options_for_draggable.reverteffect = function(element) { |
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| 413 | element.style.top = 0; |
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| 414 | element.style.left = 0; |
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| 415 | }; |
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| 416 | |
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| 417 | if(options.endeffect) |
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| 418 | options_for_draggable.endeffect = options.endeffect; |
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| 419 | |
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| 420 | if(options.zindex) |
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| 421 | options_for_draggable.zindex = options.zindex; |
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| 422 | |
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| 423 | // build options for the droppables |
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| 424 | var options_for_droppable = { |
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| 425 | overlap: options.overlap, |
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| 426 | containment: options.containment, |
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| 427 | hoverclass: options.hoverclass, |
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| 428 | onHover: Sortable.onHover, |
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| 429 | greedy: !options.dropOnEmpty |
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| 430 | } |
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| 431 | |
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| 432 | // fix for gecko engine |
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| 433 | Element.cleanWhitespace(element); |
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| 434 | |
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| 435 | options.draggables = []; |
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| 436 | options.droppables = []; |
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| 437 | |
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| 438 | // make it so |
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| 439 | |
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| 440 | // drop on empty handling |
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| 441 | if(options.dropOnEmpty) { |
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| 442 | Droppables.add(element, |
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| 443 | {containment: options.containment, onHover: Sortable.onEmptyHover, greedy: false}); |
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| 444 | options.droppables.push(element); |
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| 445 | } |
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| 446 | |
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| 447 | (this.findElements(element, options) || []).each( function(e) { |
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| 448 | // handles are per-draggable |
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| 449 | var handle = options.handle ? |
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| 450 | Element.childrenWithClassName(e, options.handle)[0] : e; |
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| 451 | options.draggables.push( |
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| 452 | new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); |
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| 453 | Droppables.add(e, options_for_droppable); |
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| 454 | options.droppables.push(e); |
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| 455 | }); |
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| 456 | |
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| 457 | // keep reference |
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| 458 | this.sortables.push(options); |
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| 459 | |
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| 460 | // for onupdate |
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| 461 | Draggables.addObserver(new SortableObserver(element, options.onUpdate)); |
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| 462 | |
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| 463 | }, |
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| 464 | |
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| 465 | // return all suitable-for-sortable elements in a guaranteed order |
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| 466 | findElements: function(element, options) { |
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| 467 | if(!element.hasChildNodes()) return null; |
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| 468 | var elements = []; |
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| 469 | $A(element.childNodes).each( function(e) { |
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| 470 | if(e.tagName && e.tagName==options.tag.toUpperCase() && |
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| 471 | (!options.only || (Element.hasClassName(e, options.only)))) |
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| 472 | elements.push(e); |
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| 473 | if(options.tree) { |
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| 474 | var grandchildren = this.findElements(e, options); |
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| 475 | if(grandchildren) elements.push(grandchildren); |
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| 476 | } |
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| 477 | }); |
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| 478 | |
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| 479 | return (elements.length>0 ? elements.flatten() : null); |
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| 480 | }, |
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| 481 | |
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| 482 | onHover: function(element, dropon, overlap) { |
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| 483 | if(overlap>0.5) { |
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| 484 | Sortable.mark(dropon, 'before'); |
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| 485 | if(dropon.previousSibling != element) { |
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| 486 | var oldParentNode = element.parentNode; |
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| 487 | element.style.visibility = "hidden"; // fix gecko rendering |
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| 488 | dropon.parentNode.insertBefore(element, dropon); |
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| 489 | if(dropon.parentNode!=oldParentNode) |
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| 490 | Sortable.options(oldParentNode).onChange(element); |
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| 491 | Sortable.options(dropon.parentNode).onChange(element); |
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| 492 | } |
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| 493 | } else { |
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| 494 | Sortable.mark(dropon, 'after'); |
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| 495 | var nextElement = dropon.nextSibling || null; |
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| 496 | if(nextElement != element) { |
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| 497 | var oldParentNode = element.parentNode; |
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| 498 | element.style.visibility = "hidden"; // fix gecko rendering |
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| 499 | dropon.parentNode.insertBefore(element, nextElement); |
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| 500 | if(dropon.parentNode!=oldParentNode) |
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| 501 | Sortable.options(oldParentNode).onChange(element); |
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| 502 | Sortable.options(dropon.parentNode).onChange(element); |
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| 503 | } |
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| 504 | } |
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| 505 | }, |
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| 506 | |
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| 507 | onEmptyHover: function(element, dropon) { |
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| 508 | if(element.parentNode!=dropon) { |
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| 509 | var oldParentNode = element.parentNode; |
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| 510 | dropon.appendChild(element); |
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| 511 | Sortable.options(oldParentNode).onChange(element); |
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| 512 | Sortable.options(dropon).onChange(element); |
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| 513 | } |
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| 514 | }, |
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| 515 | |
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| 516 | unmark: function() { |
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| 517 | if(Sortable._marker) Element.hide(Sortable._marker); |
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| 518 | }, |
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| 519 | |
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| 520 | mark: function(dropon, position) { |
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| 521 | // mark on ghosting only |
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| 522 | var sortable = Sortable.options(dropon.parentNode); |
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| 523 | if(sortable && !sortable.ghosting) return; |
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| 524 | |
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| 525 | if(!Sortable._marker) { |
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| 526 | Sortable._marker = $('dropmarker') || document.createElement('DIV'); |
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| 527 | Element.hide(Sortable._marker); |
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| 528 | Element.addClassName(Sortable._marker, 'dropmarker'); |
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| 529 | Sortable._marker.style.position = 'absolute'; |
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| 530 | document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); |
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| 531 | } |
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| 532 | var offsets = Position.cumulativeOffset(dropon); |
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| 533 | Sortable._marker.style.left = offsets[0] + 'px'; |
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| 534 | Sortable._marker.style.top = offsets[1] + 'px'; |
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| 535 | |
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| 536 | if(position=='after') |
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| 537 | if(sortable.overlap == 'horizontal') |
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| 538 | Sortable._marker.style.left = (offsets[0]+dropon.clientWidth) + 'px'; |
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| 539 | else |
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| 540 | Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px'; |
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| 541 | |
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| 542 | Element.show(Sortable._marker); |
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| 543 | }, |
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| 544 | |
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| 545 | serialize: function(element) { |
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| 546 | element = $(element); |
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| 547 | var sortableOptions = this.options(element); |
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| 548 | var options = Object.extend({ |
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| 549 | tag: sortableOptions.tag, |
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| 550 | only: sortableOptions.only, |
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| 551 | name: element.id, |
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| 552 | format: sortableOptions.format || /^[^_]*_(.*)$/ |
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| 553 | }, arguments[1] || {}); |
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| 554 | return $(this.findElements(element, options) || []).collect( function(item) { |
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| 555 | return (encodeURIComponent(options.name) + "[]=" + |
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| 556 | encodeURIComponent(item.id.match(options.format) ? item.id.match(options.format)[1] : '')); |
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| 557 | }).join("&"); |
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| 558 | } |
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| 559 | } |
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