1 // script.aculo.us dragdrop.js v1.6.4, Wed Sep 06 11:30:58 CEST 2006 |
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2 |
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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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5 // |
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6 // See scriptaculous.js for full license. |
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7 |
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8 /*--------------------------------------------------------------------------*/ |
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9 |
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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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12 |
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13 var Droppables = { |
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14 drops: [], |
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15 |
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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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18 }, |
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19 |
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20 add: function(element) { |
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21 element = $(element); |
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22 var options = Object.extend({ |
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23 greedy: true, |
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24 hoverclass: null, |
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25 tree: false |
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26 }, arguments[1] || {}); |
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27 |
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28 // cache containers |
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29 if(options.containment) { |
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30 options._containers = []; |
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31 var containment = options.containment; |
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32 if((typeof containment == 'object') && |
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33 (containment.constructor == Array)) { |
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34 containment.each( function(c) { options._containers.push($(c)) }); |
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35 } else { |
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36 options._containers.push($(containment)); |
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37 } |
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38 } |
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39 |
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40 if(options.accept) options.accept = [options.accept].flatten(); |
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41 |
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42 Element.makePositioned(element); // fix IE |
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43 options.element = element; |
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44 |
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45 this.drops.push(options); |
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46 }, |
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47 |
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48 findDeepestChild: function(drops) { |
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49 deepest = drops[0]; |
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50 |
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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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53 deepest = drops[i]; |
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54 |
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55 return deepest; |
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56 }, |
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57 |
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58 isContained: function(element, drop) { |
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59 var containmentNode; |
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60 if(drop.tree) { |
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61 containmentNode = element.treeNode; |
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62 } else { |
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63 containmentNode = element.parentNode; |
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64 } |
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65 return drop._containers.detect(function(c) { return containmentNode == c }); |
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66 }, |
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67 |
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68 isAffected: function(point, element, drop) { |
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69 return ( |
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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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73 ((!drop.accept) || |
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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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77 }, |
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78 |
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79 deactivate: function(drop) { |
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80 if(drop.hoverclass) |
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81 Element.removeClassName(drop.element, drop.hoverclass); |
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82 this.last_active = null; |
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83 }, |
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84 |
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85 activate: function(drop) { |
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86 if(drop.hoverclass) |
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87 Element.addClassName(drop.element, drop.hoverclass); |
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88 this.last_active = drop; |
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89 }, |
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90 |
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91 show: function(point, element) { |
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92 if(!this.drops.length) return; |
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93 var affected = []; |
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94 |
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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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99 }); |
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100 |
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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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104 if(drop.onHover) |
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105 drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element)); |
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106 |
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107 Droppables.activate(drop); |
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108 } |
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109 }, |
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110 |
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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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114 |
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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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118 }, |
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119 |
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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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123 } |
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124 } |
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125 |
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126 var Draggables = { |
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127 drags: [], |
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128 observers: [], |
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129 |
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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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135 |
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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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139 } |
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140 this.drags.push(draggable); |
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141 }, |
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142 |
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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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149 } |
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150 }, |
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151 |
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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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156 window.focus(); |
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157 Draggables.activeDraggable = draggable; |
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158 }.bind(this), draggable.options.delay); |
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159 } else { |
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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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162 } |
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163 }, |
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164 |
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165 deactivate: function() { |
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166 this.activeDraggable = null; |
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167 }, |
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168 |
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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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176 |
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177 this.activeDraggable.updateDrag(event, pointer); |
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178 }, |
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179 |
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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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184 } |
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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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189 }, |
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190 |
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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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194 }, |
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195 |
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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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199 }, |
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200 |
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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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204 }, |
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205 |
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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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210 }); |
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211 if(draggable.options[eventName]) draggable.options[eventName](draggable, event); |
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212 }, |
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213 |
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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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218 ).length; |
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219 }); |
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220 } |
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221 } |
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222 |
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223 /*--------------------------------------------------------------------------*/ |
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224 |
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225 var Draggable = Class.create(); |
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226 Draggable._dragging = {}; |
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227 |
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228 Draggable.prototype = { |
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229 initialize: function(element) { |
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230 var defaults = { |
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231 handle: false, |
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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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236 }); |
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237 }, |
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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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244 } |
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245 }); |
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246 }, |
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247 zindex: 1000, |
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248 revert: false, |
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249 scroll: false, |
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250 scrollSensitivity: 20, |
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251 scrollSpeed: 15, |
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252 snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] } |
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253 delay: 0 |
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254 }; |
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255 |
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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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262 } |
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263 }); |
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264 |
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265 var options = Object.extend(defaults, arguments[1] || {}); |
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266 |
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267 this.element = $(element); |
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268 |
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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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272 } |
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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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275 |
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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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279 } |
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280 |
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281 Element.makePositioned(this.element); // fix IE |
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282 |
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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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286 |
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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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289 |
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290 Draggables.register(this); |
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291 }, |
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292 |
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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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296 }, |
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297 |
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298 currentDelta: function() { |
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299 return([ |
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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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302 }, |
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303 |
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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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316 |
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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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320 |
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321 Draggables.activate(this); |
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322 Event.stop(event); |
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323 } |
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324 }, |
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325 |
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326 startDrag: function(event) { |
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327 this.dragging = true; |
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328 |
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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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332 } |
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333 |
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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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338 } |
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339 |
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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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345 } else { |
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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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348 } |
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349 } |
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350 |
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351 Draggables.notify('onStart', this, event); |
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352 |
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353 if(this.options.starteffect) this.options.starteffect(this.element); |
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354 }, |
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355 |
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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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361 |
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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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364 |
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365 if(this.options.scroll) { |
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366 this.stopScrolling(); |
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367 |
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368 var p; |
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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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371 } else { |
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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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375 |
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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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378 |
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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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381 } |
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382 var speed = [0,0]; |
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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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388 } |
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389 |
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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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392 |
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393 Event.stop(event); |
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394 }, |
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395 |
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396 finishDrag: function(event, success) { |
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397 this.dragging = false; |
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398 |
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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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403 } |
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404 |
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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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407 |
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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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410 |
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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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415 } else { |
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416 this.delta = d; |
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417 } |
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418 |
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419 if(this.options.zindex) |
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420 this.element.style.zIndex = this.originalZ; |
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421 |
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422 if(this.options.endeffect) |
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423 this.options.endeffect(this.element); |
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424 |
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425 Draggables.deactivate(this); |
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426 Droppables.reset(); |
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427 }, |
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428 |
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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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432 Event.stop(event); |
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433 }, |
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434 |
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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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439 Event.stop(event); |
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440 }, |
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441 |
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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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448 } |
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449 |
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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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452 |
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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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456 } |
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457 |
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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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460 }.bind(this)); |
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461 |
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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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465 } else { |
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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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469 } else { |
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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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472 } |
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473 }} |
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474 |
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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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480 |
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481 if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering |
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482 }, |
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483 |
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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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489 } |
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490 }, |
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491 |
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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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497 }, |
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498 |
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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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508 } |
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509 } |
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510 } else { |
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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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513 } |
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514 |
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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) |
|
525 Draggables._lastScrollPointer[1] = 0; |
|
526 this.draw(Draggables._lastScrollPointer); |
|
527 } |
|
528 |
|
529 if(this.options.change) this.options.change(this); |
|
530 }, |
|
531 |
|
532 _getWindowScroll: function(w) { |
|
533 var T, L, W, H; |
|
534 with (w.document) { |
|
535 if (w.document.documentElement && documentElement.scrollTop) { |
|
536 T = documentElement.scrollTop; |
|
537 L = documentElement.scrollLeft; |
|
538 } else if (w.document.body) { |
|
539 T = body.scrollTop; |
|
540 L = body.scrollLeft; |
|
541 } |
|
542 if (w.innerWidth) { |
|
543 W = w.innerWidth; |
|
544 H = w.innerHeight; |
|
545 } else if (w.document.documentElement && documentElement.clientWidth) { |
|
546 W = documentElement.clientWidth; |
|
547 H = documentElement.clientHeight; |
|
548 } else { |
|
549 W = body.offsetWidth; |
|
550 H = body.offsetHeight |
|
551 } |
|
552 } |
|
553 return { top: T, left: L, width: W, height: H }; |
|
554 } |
|
555 } |
|
556 |
|
557 /*--------------------------------------------------------------------------*/ |
|
558 |
|
559 var SortableObserver = Class.create(); |
|
560 SortableObserver.prototype = { |
|
561 initialize: function(element, observer) { |
|
562 this.element = $(element); |
|
563 this.observer = observer; |
|
564 this.lastValue = Sortable.serialize(this.element); |
|
565 }, |
|
566 |
|
567 onStart: function() { |
|
568 this.lastValue = Sortable.serialize(this.element); |
|
569 }, |
|
570 |
|
571 onEnd: function() { |
|
572 Sortable.unmark(); |
|
573 if(this.lastValue != Sortable.serialize(this.element)) |
|
574 this.observer(this.element) |
|
575 } |
|
576 } |
|
577 |
|
578 var Sortable = { |
|
579 SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/, |
|
580 |
|
581 sortables: {}, |
|
582 |
|
583 _findRootElement: function(element) { |
|
584 while (element.tagName != "BODY") { |
|
585 if(element.id && Sortable.sortables[element.id]) return element; |
|
586 element = element.parentNode; |
|
587 } |
|
588 }, |
|
589 |
|
590 options: function(element) { |
|
591 element = Sortable._findRootElement($(element)); |
|
592 if(!element) return; |
|
593 return Sortable.sortables[element.id]; |
|
594 }, |
|
595 |
|
596 destroy: function(element){ |
|
597 var s = Sortable.options(element); |
|
598 |
|
599 if(s) { |
|
600 Draggables.removeObserver(s.element); |
|
601 s.droppables.each(function(d){ Droppables.remove(d) }); |
|
602 s.draggables.invoke('destroy'); |
|
603 |
|
604 delete Sortable.sortables[s.element.id]; |
|
605 } |
|
606 }, |
|
607 |
|
608 create: function(element) { |
|
609 element = $(element); |
|
610 var options = Object.extend({ |
|
611 element: element, |
|
612 tag: 'li', // assumes li children, override with tag: 'tagname' |
|
613 dropOnEmpty: false, |
|
614 tree: false, |
|
615 treeTag: 'ul', |
|
616 overlap: 'vertical', // one of 'vertical', 'horizontal' |
|
617 constraint: 'vertical', // one of 'vertical', 'horizontal', false |
|
618 containment: element, // also takes array of elements (or id's); or false |
|
619 handle: false, // or a CSS class |
|
620 only: false, |
|
621 delay: 0, |
|
622 hoverclass: null, |
|
623 ghosting: false, |
|
624 scroll: false, |
|
625 scrollSensitivity: 20, |
|
626 scrollSpeed: 15, |
|
627 format: this.SERIALIZE_RULE, |
|
628 onChange: Prototype.emptyFunction, |
|
629 onUpdate: Prototype.emptyFunction |
|
630 }, arguments[1] || {}); |
|
631 |
|
632 // clear any old sortable with same element |
|
633 this.destroy(element); |
|
634 |
|
635 // build options for the draggables |
|
636 var options_for_draggable = { |
|
637 revert: true, |
|
638 scroll: options.scroll, |
|
639 scrollSpeed: options.scrollSpeed, |
|
640 scrollSensitivity: options.scrollSensitivity, |
|
641 delay: options.delay, |
|
642 ghosting: options.ghosting, |
|
643 constraint: options.constraint, |
|
644 handle: options.handle }; |
|
645 |
|
646 if(options.starteffect) |
|
647 options_for_draggable.starteffect = options.starteffect; |
|
648 |
|
649 if(options.reverteffect) |
|
650 options_for_draggable.reverteffect = options.reverteffect; |
|
651 else |
|
652 if(options.ghosting) options_for_draggable.reverteffect = function(element) { |
|
653 element.style.top = 0; |
|
654 element.style.left = 0; |
|
655 }; |
|
656 |
|
657 if(options.endeffect) |
|
658 options_for_draggable.endeffect = options.endeffect; |
|
659 |
|
660 if(options.zindex) |
|
661 options_for_draggable.zindex = options.zindex; |
|
662 |
|
663 // build options for the droppables |
|
664 var options_for_droppable = { |
|
665 overlap: options.overlap, |
|
666 containment: options.containment, |
|
667 tree: options.tree, |
|
668 hoverclass: options.hoverclass, |
|
669 onHover: Sortable.onHover |
|
670 //greedy: !options.dropOnEmpty |
|
671 } |
|
672 |
|
673 var options_for_tree = { |
|
674 onHover: Sortable.onEmptyHover, |
|
675 overlap: options.overlap, |
|
676 containment: options.containment, |
|
677 hoverclass: options.hoverclass |
|
678 } |
|
679 |
|
680 // fix for gecko engine |
|
681 Element.cleanWhitespace(element); |
|
682 |
|
683 options.draggables = []; |
|
684 options.droppables = []; |
|
685 |
|
686 // drop on empty handling |
|
687 if(options.dropOnEmpty || options.tree) { |
|
688 Droppables.add(element, options_for_tree); |
|
689 options.droppables.push(element); |
|
690 } |
|
691 |
|
692 (this.findElements(element, options) || []).each( function(e) { |
|
693 // handles are per-draggable |
|
694 var handle = options.handle ? |
|
695 Element.childrenWithClassName(e, options.handle)[0] : e; |
|
696 options.draggables.push( |
|
697 new Draggable(e, Object.extend(options_for_draggable, { handle: handle }))); |
|
698 Droppables.add(e, options_for_droppable); |
|
699 if(options.tree) e.treeNode = element; |
|
700 options.droppables.push(e); |
|
701 }); |
|
702 |
|
703 if(options.tree) { |
|
704 (Sortable.findTreeElements(element, options) || []).each( function(e) { |
|
705 Droppables.add(e, options_for_tree); |
|
706 e.treeNode = element; |
|
707 options.droppables.push(e); |
|
708 }); |
|
709 } |
|
710 |
|
711 // keep reference |
|
712 this.sortables[element.id] = options; |
|
713 |
|
714 // for onupdate |
|
715 Draggables.addObserver(new SortableObserver(element, options.onUpdate)); |
|
716 |
|
717 }, |
|
718 |
|
719 // return all suitable-for-sortable elements in a guaranteed order |
|
720 findElements: function(element, options) { |
|
721 return Element.findChildren( |
|
722 element, options.only, options.tree ? true : false, options.tag); |
|
723 }, |
|
724 |
|
725 findTreeElements: function(element, options) { |
|
726 return Element.findChildren( |
|
727 element, options.only, options.tree ? true : false, options.treeTag); |
|
728 }, |
|
729 |
|
730 onHover: function(element, dropon, overlap) { |
|
731 if(Element.isParent(dropon, element)) return; |
|
732 |
|
733 if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) { |
|
734 return; |
|
735 } else if(overlap>0.5) { |
|
736 Sortable.mark(dropon, 'before'); |
|
737 if(dropon.previousSibling != element) { |
|
738 var oldParentNode = element.parentNode; |
|
739 element.style.visibility = "hidden"; // fix gecko rendering |
|
740 dropon.parentNode.insertBefore(element, dropon); |
|
741 if(dropon.parentNode!=oldParentNode) |
|
742 Sortable.options(oldParentNode).onChange(element); |
|
743 Sortable.options(dropon.parentNode).onChange(element); |
|
744 } |
|
745 } else { |
|
746 Sortable.mark(dropon, 'after'); |
|
747 var nextElement = dropon.nextSibling || null; |
|
748 if(nextElement != element) { |
|
749 var oldParentNode = element.parentNode; |
|
750 element.style.visibility = "hidden"; // fix gecko rendering |
|
751 dropon.parentNode.insertBefore(element, nextElement); |
|
752 if(dropon.parentNode!=oldParentNode) |
|
753 Sortable.options(oldParentNode).onChange(element); |
|
754 Sortable.options(dropon.parentNode).onChange(element); |
|
755 } |
|
756 } |
|
757 }, |
|
758 |
|
759 onEmptyHover: function(element, dropon, overlap) { |
|
760 var oldParentNode = element.parentNode; |
|
761 var droponOptions = Sortable.options(dropon); |
|
762 |
|
763 if(!Element.isParent(dropon, element)) { |
|
764 var index; |
|
765 |
|
766 var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only}); |
|
767 var child = null; |
|
768 |
|
769 if(children) { |
|
770 var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap); |
|
771 |
|
772 for (index = 0; index < children.length; index += 1) { |
|
773 if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) { |
|
774 offset -= Element.offsetSize (children[index], droponOptions.overlap); |
|
775 } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) { |
|
776 child = index + 1 < children.length ? children[index + 1] : null; |
|
777 break; |
|
778 } else { |
|
779 child = children[index]; |
|
780 break; |
|
781 } |
|
782 } |
|
783 } |
|
784 |
|
785 dropon.insertBefore(element, child); |
|
786 |
|
787 Sortable.options(oldParentNode).onChange(element); |
|
788 droponOptions.onChange(element); |
|
789 } |
|
790 }, |
|
791 |
|
792 unmark: function() { |
|
793 if(Sortable._marker) Element.hide(Sortable._marker); |
|
794 }, |
|
795 |
|
796 mark: function(dropon, position) { |
|
797 // mark on ghosting only |
|
798 var sortable = Sortable.options(dropon.parentNode); |
|
799 if(sortable && !sortable.ghosting) return; |
|
800 |
|
801 if(!Sortable._marker) { |
|
802 Sortable._marker = $('dropmarker') || document.createElement('DIV'); |
|
803 Element.hide(Sortable._marker); |
|
804 Element.addClassName(Sortable._marker, 'dropmarker'); |
|
805 Sortable._marker.style.position = 'absolute'; |
|
806 document.getElementsByTagName("body").item(0).appendChild(Sortable._marker); |
|
807 } |
|
808 var offsets = Position.cumulativeOffset(dropon); |
|
809 Sortable._marker.style.left = offsets[0] + 'px'; |
|
810 Sortable._marker.style.top = offsets[1] + 'px'; |
|
811 |
|
812 if(position=='after') |
|
813 if(sortable.overlap == 'horizontal') |
|
814 Sortable._marker.style.left = (offsets[0]+dropon.clientWidth) + 'px'; |
|
815 else |
|
816 Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px'; |
|
817 |
|
818 Element.show(Sortable._marker); |
|
819 }, |
|
820 |
|
821 _tree: function(element, options, parent) { |
|
822 var children = Sortable.findElements(element, options) || []; |
|
823 |
|
824 for (var i = 0; i < children.length; ++i) { |
|
825 var match = children[i].id.match(options.format); |
|
826 |
|
827 if (!match) continue; |
|
828 |
|
829 var child = { |
|
830 id: encodeURIComponent(match ? match[1] : null), |
|
831 element: element, |
|
832 parent: parent, |
|
833 children: new Array, |
|
834 position: parent.children.length, |
|
835 container: Sortable._findChildrenElement(children[i], options.treeTag.toUpperCase()) |
|
836 } |
|
837 |
|
838 /* Get the element containing the children and recurse over it */ |
|
839 if (child.container) |
|
840 this._tree(child.container, options, child) |
|
841 |
|
842 parent.children.push (child); |
|
843 } |
|
844 |
|
845 return parent; |
|
846 }, |
|
847 |
|
848 /* Finds the first element of the given tag type within a parent element. |
|
849 Used for finding the first LI[ST] within a L[IST]I[TEM].*/ |
|
850 _findChildrenElement: function (element, containerTag) { |
|
851 if (element && element.hasChildNodes) |
|
852 for (var i = 0; i < element.childNodes.length; ++i) |
|
853 if (element.childNodes[i].tagName == containerTag) |
|
854 return element.childNodes[i]; |
|
855 |
|
856 return null; |
|
857 }, |
|
858 |
|
859 tree: function(element) { |
|
860 element = $(element); |
|
861 var sortableOptions = this.options(element); |
|
862 var options = Object.extend({ |
|
863 tag: sortableOptions.tag, |
|
864 treeTag: sortableOptions.treeTag, |
|
865 only: sortableOptions.only, |
|
866 name: element.id, |
|
867 format: sortableOptions.format |
|
868 }, arguments[1] || {}); |
|
869 |
|
870 var root = { |
|
871 id: null, |
|
872 parent: null, |
|
873 children: new Array, |
|
874 container: element, |
|
875 position: 0 |
|
876 } |
|
877 |
|
878 return Sortable._tree (element, options, root); |
|
879 }, |
|
880 |
|
881 /* Construct a [i] index for a particular node */ |
|
882 _constructIndex: function(node) { |
|
883 var index = ''; |
|
884 do { |
|
885 if (node.id) index = '[' + node.position + ']' + index; |
|
886 } while ((node = node.parent) != null); |
|
887 return index; |
|
888 }, |
|
889 |
|
890 sequence: function(element) { |
|
891 element = $(element); |
|
892 var options = Object.extend(this.options(element), arguments[1] || {}); |
|
893 |
|
894 return $(this.findElements(element, options) || []).map( function(item) { |
|
895 return item.id.match(options.format) ? item.id.match(options.format)[1] : ''; |
|
896 }); |
|
897 }, |
|
898 |
|
899 setSequence: function(element, new_sequence) { |
|
900 element = $(element); |
|
901 var options = Object.extend(this.options(element), arguments[2] || {}); |
|
902 |
|
903 var nodeMap = {}; |
|
904 this.findElements(element, options).each( function(n) { |
|
905 if (n.id.match(options.format)) |
|
906 nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode]; |
|
907 n.parentNode.removeChild(n); |
|
908 }); |
|
909 |
|
910 new_sequence.each(function(ident) { |
|
911 var n = nodeMap[ident]; |
|
912 if (n) { |
|
913 n[1].appendChild(n[0]); |
|
914 delete nodeMap[ident]; |
|
915 } |
|
916 }); |
|
917 }, |
|
918 |
|
919 serialize: function(element) { |
|
920 element = $(element); |
|
921 var options = Object.extend(Sortable.options(element), arguments[1] || {}); |
|
922 var name = encodeURIComponent( |
|
923 (arguments[1] && arguments[1].name) ? arguments[1].name : element.id); |
|
924 |
|
925 if (options.tree) { |
|
926 return Sortable.tree(element, arguments[1]).children.map( function (item) { |
|
927 return [name + Sortable._constructIndex(item) + "[id]=" + |
|
928 encodeURIComponent(item.id)].concat(item.children.map(arguments.callee)); |
|
929 }).flatten().join('&'); |
|
930 } else { |
|
931 return Sortable.sequence(element, arguments[1]).map( function(item) { |
|
932 return name + "[]=" + encodeURIComponent(item); |
|
933 }).join('&'); |
|
934 } |
|
935 } |
|
936 } |
|
937 |
|
938 /* Returns true if child is contained within element */ |
|
939 Element.isParent = function(child, element) { |
|
940 if (!child.parentNode || child == element) return false; |
|
941 |
|
942 if (child.parentNode == element) return true; |
|
943 |
|
944 return Element.isParent(child.parentNode, element); |
|
945 } |
|
946 |
|
947 Element.findChildren = function(element, only, recursive, tagName) { |
|
948 if(!element.hasChildNodes()) return null; |
|
949 tagName = tagName.toUpperCase(); |
|
950 if(only) only = [only].flatten(); |
|
951 var elements = []; |
|
952 $A(element.childNodes).each( function(e) { |
|
953 if(e.tagName && e.tagName.toUpperCase()==tagName && |
|
954 (!only || (Element.classNames(e).detect(function(v) { return only.include(v) })))) |
|
955 elements.push(e); |
|
956 if(recursive) { |
|
957 var grandchildren = Element.findChildren(e, only, recursive, tagName); |
|
958 if(grandchildren) elements.push(grandchildren); |
|
959 } |
|
960 }); |
|
961 |
|
962 return (elements.length>0 ? elements.flatten() : []); |
|
963 } |
|
964 |
|
965 Element.offsetSize = function (element, type) { |
|
966 if (type == 'vertical' || type == 'height') |
|
967 return element.offsetHeight; |
|
968 else |
|
969 return element.offsetWidth; |
|
970 } |
|