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