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root/public/javascripts/dragdrop.js @ 402c7e4f

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// Copyright (c) 2005-2008 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
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// (c) 2005-2008 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz)
//
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// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

if(Object.isUndefined(Effect))
throw("dragdrop.js requires including script.aculo.us' effects.js library");

var Droppables = {
drops: [],

remove: function(element) {
this.drops = this.drops.reject(function(d) { return d.element==$(element) });
},

add: function(element) {
element = $(element);
var options = Object.extend({
greedy: true,
hoverclass: null,
tree: false
}, arguments[1] || { });

// cache containers
if(options.containment) {
options._containers = [];
var containment = options.containment;
if(Object.isArray(containment)) {
containment.each( function(c) { options._containers.push($(c)) });
} else {
options._containers.push($(containment));
}
}
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if(options.accept) options.accept = [options.accept].flatten();

Element.makePositioned(element); // fix IE
options.element = element;

this.drops.push(options);
},
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findDeepestChild: function(drops) {
deepest = drops[0];
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for (i = 1; i < drops.length; ++i)
if (Element.isParent(drops[i].element, deepest.element))
deepest = drops[i];
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return deepest;
},

isContained: function(element, drop) {
var containmentNode;
if(drop.tree) {
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containmentNode = element.treeNode;
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} else {
containmentNode = element.parentNode;
}
return drop._containers.detect(function(c) { return containmentNode == c });
},
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isAffected: function(point, element, drop) {
return (
(drop.element!=element) &&
((!drop._containers) ||
this.isContained(element, drop)) &&
((!drop.accept) ||
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(Element.classNames(element).detect(
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function(v) { return drop.accept.include(v) } ) )) &&
Position.within(drop.element, point[0], point[1]) );
},

deactivate: function(drop) {
if(drop.hoverclass)
Element.removeClassName(drop.element, drop.hoverclass);
this.last_active = null;
},

activate: function(drop) {
if(drop.hoverclass)
Element.addClassName(drop.element, drop.hoverclass);
this.last_active = drop;
},

show: function(point, element) {
if(!this.drops.length) return;
var drop, affected = [];
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this.drops.each( function(drop) {
if(Droppables.isAffected(point, element, drop))
affected.push(drop);
});
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if(affected.length>0)
drop = Droppables.findDeepestChild(affected);

if(this.last_active && this.last_active != drop) this.deactivate(this.last_active);
if (drop) {
Position.within(drop.element, point[0], point[1]);
if(drop.onHover)
drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
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if (drop != this.last_active) Droppables.activate(drop);
}
},

fire: function(event, element) {
if(!this.last_active) return;
Position.prepare();

if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
if (this.last_active.onDrop) {
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this.last_active.onDrop(element, this.last_active.element, event);
return true;
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}
},

reset: function() {
if(this.last_active)
this.deactivate(this.last_active);
}
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};
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var Draggables = {
drags: [],
observers: [],
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register: function(draggable) {
if(this.drags.length == 0) {
this.eventMouseUp = this.endDrag.bindAsEventListener(this);
this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
this.eventKeypress = this.keyPress.bindAsEventListener(this);
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Event.observe(document, "mouseup", this.eventMouseUp);
Event.observe(document, "mousemove", this.eventMouseMove);
Event.observe(document, "keypress", this.eventKeypress);
}
this.drags.push(draggable);
},
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unregister: function(draggable) {
this.drags = this.drags.reject(function(d) { return d==draggable });
if(this.drags.length == 0) {
Event.stopObserving(document, "mouseup", this.eventMouseUp);
Event.stopObserving(document, "mousemove", this.eventMouseMove);
Event.stopObserving(document, "keypress", this.eventKeypress);
}
},
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activate: function(draggable) {
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if(draggable.options.delay) {
this._timeout = setTimeout(function() {
Draggables._timeout = null;
window.focus();
Draggables.activeDraggable = draggable;
}.bind(this), draggable.options.delay);
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} else {
window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
this.activeDraggable = draggable;
}
},
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deactivate: function() {
this.activeDraggable = null;
},
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updateDrag: function(event) {
if(!this.activeDraggable) return;
var pointer = [Event.pointerX(event), Event.pointerY(event)];
// Mozilla-based browsers fire successive mousemove events with
// the same coordinates, prevent needless redrawing (moz bug?)
if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
this._lastPointer = pointer;
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this.activeDraggable.updateDrag(event, pointer);
},
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endDrag: function(event) {
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if(this._timeout) {
clearTimeout(this._timeout);
this._timeout = null;
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}
if(!this.activeDraggable) return;
this._lastPointer = null;
this.activeDraggable.endDrag(event);
this.activeDraggable = null;
},
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keyPress: function(event) {
if(this.activeDraggable)
this.activeDraggable.keyPress(event);
},
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addObserver: function(observer) {
this.observers.push(observer);
this._cacheObserverCallbacks();
},
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removeObserver: function(element) { // element instead of observer fixes mem leaks
this.observers = this.observers.reject( function(o) { return o.element==element });
this._cacheObserverCallbacks();
},
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notify: function(eventName, draggable, event) { // 'onStart', 'onEnd', 'onDrag'
if(this[eventName+'Count'] > 0)
this.observers.each( function(o) {
if(o[eventName]) o[eventName](eventName, draggable, event);
});
if(draggable.options[eventName]) draggable.options[eventName](draggable, event);
},
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_cacheObserverCallbacks: function() {
['onStart','onEnd','onDrag'].each( function(eventName) {
Draggables[eventName+'Count'] = Draggables.observers.select(
function(o) { return o[eventName]; }
).length;
});
}
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};
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/*--------------------------------------------------------------------------*/

var Draggable = Class.create({
initialize: function(element) {
var defaults = {
handle: false,
reverteffect: function(element, top_offset, left_offset) {
var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur,
queue: {scope:'_draggable', position:'end'}
});
},
endeffect: function(element) {
var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0;
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new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity,
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queue: {scope:'_draggable', position:'end'},
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afterFinish: function(){
Draggable._dragging[element] = false
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}
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});
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},
zindex: 1000,
revert: false,
quiet: false,
scroll: false,
scrollSensitivity: 20,
scrollSpeed: 15,
snap: false, // false, or xy or [x,y] or function(x,y){ return [x,y] }
delay: 0
};
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if(!arguments[1] || Object.isUndefined(arguments[1].endeffect))
Object.extend(defaults, {
starteffect: function(element) {
element._opacity = Element.getOpacity(element);
Draggable._dragging[element] = true;
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new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7});
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}
});
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var options = Object.extend(defaults, arguments[1] || { });

this.element = $(element);
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if(options.handle && Object.isString(options.handle))
this.handle = this.element.down('.'+options.handle, 0);
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if(!this.handle) this.handle = $(options.handle);
if(!this.handle) this.handle = this.element;
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if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) {
options.scroll = $(options.scroll);
this._isScrollChild = Element.childOf(this.element, options.scroll);
}

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Element.makePositioned(this.element); // fix IE
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this.options = options;
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this.dragging = false;
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this.eventMouseDown = this.initDrag.bindAsEventListener(this);
Event.observe(this.handle, "mousedown", this.eventMouseDown);
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Draggables.register(this);
},
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destroy: function() {
Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
Draggables.unregister(this);
},
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currentDelta: function() {
return([
parseInt(Element.getStyle(this.element,'left') || '0'),
parseInt(Element.getStyle(this.element,'top') || '0')]);
},
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initDrag: function(event) {
if(!Object.isUndefined(Draggable._dragging[this.element]) &&
Draggable._dragging[this.element]) return;
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if(Event.isLeftClick(event)) {
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// abort on form elements, fixes a Firefox issue
var src = Event.element(event);
if((tag_name = src.tagName.toUpperCase()) && (
tag_name=='INPUT' ||
tag_name=='SELECT' ||
tag_name=='OPTION' ||
tag_name=='BUTTON' ||
tag_name=='TEXTAREA')) return;
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var pointer = [Event.pointerX(event), Event.pointerY(event)];
var pos = Position.cumulativeOffset(this.element);
this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
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Draggables.activate(this);
Event.stop(event);
}
},
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startDrag: function(event) {
this.dragging = true;
if(!this.delta)
this.delta = this.currentDelta();
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if(this.options.zindex) {
this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
this.element.style.zIndex = this.options.zindex;
}
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if(this.options.ghosting) {
this._clone = this.element.cloneNode(true);
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this._originallyAbsolute = (this.element.getStyle('position') == 'absolute');
if (!this._originallyAbsolute)
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Position.absolutize(this.element);
this.element.parentNode.insertBefore(this._clone, this.element);
}
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if(this.options.scroll) {
if (this.options.scroll == window) {
var where = this._getWindowScroll(this.options.scroll);
this.originalScrollLeft = where.left;
this.originalScrollTop = where.top;
} else {
this.originalScrollLeft = this.options.scroll.scrollLeft;
this.originalScrollTop = this.options.scroll.scrollTop;
}
}
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Draggables.notify('onStart', this, event);
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if(this.options.starteffect) this.options.starteffect(this.element);
},
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updateDrag: function(event, pointer) {
if(!this.dragging) this.startDrag(event);
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if(!this.options.quiet){
Position.prepare();
Droppables.show(pointer, this.element);
}
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Draggables.notify('onDrag', this, event);
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this.draw(pointer);
if(this.options.change) this.options.change(this);
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if(this.options.scroll) {
this.stopScrolling();
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var p;
if (this.options.scroll == window) {
with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
} else {
p = Position.page(this.options.scroll);
p[0] += this.options.scroll.scrollLeft + Position.deltaX;
p[1] += this.options.scroll.scrollTop + Position.deltaY;
p.push(p[0]+this.options.scroll.offsetWidth);
p.push(p[1]+this.options.scroll.offsetHeight);
}
var speed = [0,0];
if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
this.startScrolling(speed);
}
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// fix AppleWebKit rendering
if(Prototype.Browser.WebKit) window.scrollBy(0,0);
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Event.stop(event);
},
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finishDrag: function(event, success) {
this.dragging = false;
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if(this.options.quiet){
Position.prepare();
var pointer = [Event.pointerX(event), Event.pointerY(event)];
Droppables.show(pointer, this.element);
}

if(this.options.ghosting) {
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if (!this._originallyAbsolute)
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Position.relativize(this.element);
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delete this._originallyAbsolute;
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Element.remove(this._clone);
this._clone = null;
}

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var dropped = false;
if(success) {
dropped = Droppables.fire(event, this.element);
if (!dropped) dropped = false;
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}
if(dropped && this.options.onDropped) this.options.onDropped(this.element);
Draggables.notify('onEnd', this, event);

var revert = this.options.revert;
if(revert && Object.isFunction(revert)) revert = revert(this.element);
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var d = this.currentDelta();
if(revert && this.options.reverteffect) {
if (dropped == 0 || revert != 'failure')
this.options.reverteffect(this.element,
d[1]-this.delta[1], d[0]-this.delta[0]);
} else {
this.delta = d;
}

if(this.options.zindex)
this.element.style.zIndex = this.originalZ;

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if(this.options.endeffect)
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this.options.endeffect(this.element);
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Draggables.deactivate(this);
Droppables.reset();
},
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keyPress: function(event) {
if(event.keyCode!=Event.KEY_ESC) return;
this.finishDrag(event, false);
Event.stop(event);
},
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endDrag: function(event) {
if(!this.dragging) return;
this.stopScrolling();
this.finishDrag(event, true);
Event.stop(event);
},
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draw: function(point) {
var pos = Position.cumulativeOffset(this.element);
if(this.options.ghosting) {
var r = Position.realOffset(this.element);
pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY;
}
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var d = this.currentDelta();
pos[0] -= d[0]; pos[1] -= d[1];
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if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) {
pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
}
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var p = [0,1].map(function(i){
return (point[i]-pos[i]-this.offset[i])
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}.bind(this));
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if(this.options.snap) {
if(Object.isFunction(this.options.snap)) {
p = this.options.snap(p[0],p[1],this);
} else {
if(Object.isArray(this.options.snap)) {
p = p.map( function(v, i) {
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return (v/this.options.snap[i]).round()*this.options.snap[i] }.bind(this));
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} else {
p = p.map( function(v) {
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return (v/this.options.snap).round()*this.options.snap }.bind(this));
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}
}}
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var style = this.element.style;
if((!this.options.constraint) || (this.options.constraint=='horizontal'))
style.left = p[0] + "px";
if((!this.options.constraint) || (this.options.constraint=='vertical'))
style.top = p[1] + "px";
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if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
},
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stopScrolling: function() {
if(this.scrollInterval) {
clearInterval(this.scrollInterval);
this.scrollInterval = null;
Draggables._lastScrollPointer = null;
}
},
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startScrolling: function(speed) {
if(!(speed[0] || speed[1])) return;
this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
this.lastScrolled = new Date();
this.scrollInterval = setInterval(this.scroll.bind(this), 10);
},
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scroll: function() {
var current = new Date();
var delta = current - this.lastScrolled;
this.lastScrolled = current;
if(this.options.scroll == window) {
with (this._getWindowScroll(this.options.scroll)) {
if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
var d = delta / 1000;
this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
}
}
} else {
this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
this.options.scroll.scrollTop += this.scrollSpeed[1] * delta / 1000;
}
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Position.prepare();
Droppables.show(Draggables._lastPointer, this.element);
Draggables.notify('onDrag', this);
if (this._isScrollChild) {
Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
if (Draggables._lastScrollPointer[0] < 0)
Draggables._lastScrollPointer[0] = 0;
if (Draggables._lastScrollPointer[1] < 0)
Draggables._lastScrollPointer[1] = 0;
this.draw(Draggables._lastScrollPointer);
}
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
if(this.options.change) this.options.change(this);
},
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
_getWindowScroll: function(w) {
var T, L, W, H;
with (w.document) {
if (w.document.documentElement && documentElement.scrollTop) {
T = documentElement.scrollTop;
L = documentElement.scrollLeft;
} else if (w.document.body) {
T = body.scrollTop;
L = body.scrollLeft;
}
if (w.innerWidth) {
W = w.innerWidth;
H = w.innerHeight;
} else if (w.document.documentElement && documentElement.clientWidth) {
W = documentElement.clientWidth;
H = documentElement.clientHeight;
} else {
W = body.offsetWidth;
d86eb8c1 Marc Dequènes (Duck)
H = body.offsetHeight;
b689e231 Marc Dequènes (Duck)
}
}
return { top: T, left: L, width: W, height: H };
}
});

Draggable._dragging = { };

/*--------------------------------------------------------------------------*/

var SortableObserver = Class.create({
initialize: function(element, observer) {
this.element = $(element);
this.observer = observer;
this.lastValue = Sortable.serialize(this.element);
},
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b689e231 Marc Dequènes (Duck)
onStart: function() {
this.lastValue = Sortable.serialize(this.element);
},
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
onEnd: function() {
Sortable.unmark();
if(this.lastValue != Sortable.serialize(this.element))
this.observer(this.element)
}
});

var Sortable = {
SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,
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b689e231 Marc Dequènes (Duck)
sortables: { },
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
_findRootElement: function(element) {
d86eb8c1 Marc Dequènes (Duck)
while (element.tagName.toUpperCase() != "BODY") {
b689e231 Marc Dequènes (Duck)
if(element.id && Sortable.sortables[element.id]) return element;
element = element.parentNode;
}
},

options: function(element) {
element = Sortable._findRootElement($(element));
if(!element) return;
return Sortable.sortables[element.id];
},
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destroy: function(element){
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element = $(element);
var s = Sortable.sortables[element.id];

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if(s) {
Draggables.removeObserver(s.element);
s.droppables.each(function(d){ Droppables.remove(d) });
s.draggables.invoke('destroy');
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
delete Sortable.sortables[s.element.id];
}
},

create: function(element) {
element = $(element);
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var options = Object.extend({
b689e231 Marc Dequènes (Duck)
element: element,
tag: 'li', // assumes li children, override with tag: 'tagname'
dropOnEmpty: false,
tree: false,
treeTag: 'ul',
overlap: 'vertical', // one of 'vertical', 'horizontal'
constraint: 'vertical', // one of 'vertical', 'horizontal', false
containment: element, // also takes array of elements (or id's); or false
handle: false, // or a CSS class
only: false,
delay: 0,
hoverclass: null,
ghosting: false,
d86eb8c1 Marc Dequènes (Duck)
quiet: false,
b689e231 Marc Dequènes (Duck)
scroll: false,
scrollSensitivity: 20,
scrollSpeed: 15,
format: this.SERIALIZE_RULE,
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// these take arrays of elements or ids and can be
b689e231 Marc Dequènes (Duck)
// used for better initialization performance
elements: false,
handles: false,
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
onChange: Prototype.emptyFunction,
onUpdate: Prototype.emptyFunction
}, arguments[1] || { });

// clear any old sortable with same element
this.destroy(element);

// build options for the draggables
var options_for_draggable = {
revert: true,
quiet: options.quiet,
scroll: options.scroll,
scrollSpeed: options.scrollSpeed,
scrollSensitivity: options.scrollSensitivity,
delay: options.delay,
ghosting: options.ghosting,
constraint: options.constraint,
handle: options.handle };

if(options.starteffect)
options_for_draggable.starteffect = options.starteffect;

if(options.reverteffect)
options_for_draggable.reverteffect = options.reverteffect;
else
if(options.ghosting) options_for_draggable.reverteffect = function(element) {
element.style.top = 0;
element.style.left = 0;
};

if(options.endeffect)
options_for_draggable.endeffect = options.endeffect;

if(options.zindex)
options_for_draggable.zindex = options.zindex;

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// build options for the droppables
b689e231 Marc Dequènes (Duck)
var options_for_droppable = {
overlap: options.overlap,
containment: options.containment,
tree: options.tree,
hoverclass: options.hoverclass,
onHover: Sortable.onHover
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};

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var options_for_tree = {
onHover: Sortable.onEmptyHover,
overlap: options.overlap,
containment: options.containment,
hoverclass: options.hoverclass
d86eb8c1 Marc Dequènes (Duck)
};
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// fix for gecko engine
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Element.cleanWhitespace(element);
b689e231 Marc Dequènes (Duck)
options.draggables = [];
options.droppables = [];

// drop on empty handling
if(options.dropOnEmpty || options.tree) {
Droppables.add(element, options_for_tree);
options.droppables.push(element);
}

(options.elements || this.findElements(element, options) || []).each( function(e,i) {
var handle = options.handles ? $(options.handles[i]) :
d86eb8c1 Marc Dequènes (Duck)
(options.handle ? $(e).select('.' + options.handle)[0] : e);
b689e231 Marc Dequènes (Duck)
options.draggables.push(
new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
Droppables.add(e, options_for_droppable);
if(options.tree) e.treeNode = element;
d86eb8c1 Marc Dequènes (Duck)
options.droppables.push(e);
b689e231 Marc Dequènes (Duck)
});
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b689e231 Marc Dequènes (Duck)
if(options.tree) {
(Sortable.findTreeElements(element, options) || []).each( function(e) {
Droppables.add(e, options_for_tree);
e.treeNode = element;
options.droppables.push(e);
});
}

// keep reference
this.sortables[element.id] = options;

// for onupdate
Draggables.addObserver(new SortableObserver(element, options.onUpdate));

},

// return all suitable-for-sortable elements in a guaranteed order
findElements: function(element, options) {
return Element.findChildren(
element, options.only, options.tree ? true : false, options.tag);
},
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b689e231 Marc Dequènes (Duck)
findTreeElements: function(element, options) {
return Element.findChildren(
element, options.only, options.tree ? true : false, options.treeTag);
},

onHover: function(element, dropon, overlap) {
if(Element.isParent(dropon, element)) return;

if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
return;
} else if(overlap>0.5) {
Sortable.mark(dropon, 'before');
if(dropon.previousSibling != element) {
var oldParentNode = element.parentNode;
element.style.visibility = "hidden"; // fix gecko rendering
dropon.parentNode.insertBefore(element, dropon);
d86eb8c1 Marc Dequènes (Duck)
if(dropon.parentNode!=oldParentNode)
b689e231 Marc Dequènes (Duck)
Sortable.options(oldParentNode).onChange(element);
Sortable.options(dropon.parentNode).onChange(element);
}
} else {
Sortable.mark(dropon, 'after');
var nextElement = dropon.nextSibling || null;
if(nextElement != element) {
var oldParentNode = element.parentNode;
element.style.visibility = "hidden"; // fix gecko rendering
dropon.parentNode.insertBefore(element, nextElement);
d86eb8c1 Marc Dequènes (Duck)
if(dropon.parentNode!=oldParentNode)
b689e231 Marc Dequènes (Duck)
Sortable.options(oldParentNode).onChange(element);
Sortable.options(dropon.parentNode).onChange(element);
}
}
},
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onEmptyHover: function(element, dropon, overlap) {
var oldParentNode = element.parentNode;
var droponOptions = Sortable.options(dropon);
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
if(!Element.isParent(dropon, element)) {
var index;
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only});
var child = null;
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
if(children) {
var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
for (index = 0; index < children.length; index += 1) {
if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
offset -= Element.offsetSize (children[index], droponOptions.overlap);
} else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
child = index + 1 < children.length ? children[index + 1] : null;
break;
} else {
child = children[index];
break;
}
}
}
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
dropon.insertBefore(element, child);
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
Sortable.options(oldParentNode).onChange(element);
droponOptions.onChange(element);
}
},

unmark: function() {
if(Sortable._marker) Sortable._marker.hide();
},

mark: function(dropon, position) {
// mark on ghosting only
var sortable = Sortable.options(dropon.parentNode);
d86eb8c1 Marc Dequènes (Duck)
if(sortable && !sortable.ghosting) return;
b689e231 Marc Dequènes (Duck)
if(!Sortable._marker) {
d86eb8c1 Marc Dequènes (Duck)
Sortable._marker =
b689e231 Marc Dequènes (Duck)
($('dropmarker') || Element.extend(document.createElement('DIV'))).
hide().addClassName('dropmarker').setStyle({position:'absolute'});
document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
d86eb8c1 Marc Dequènes (Duck)
}
b689e231 Marc Dequènes (Duck)
var offsets = Position.cumulativeOffset(dropon);
Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'});
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
if(position=='after')
d86eb8c1 Marc Dequènes (Duck)
if(sortable.overlap == 'horizontal')
b689e231 Marc Dequènes (Duck)
Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'});
else
Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'});
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
Sortable._marker.show();
},
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
_tree: function(element, options, parent) {
var children = Sortable.findElements(element, options) || [];
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
for (var i = 0; i < children.length; ++i) {
var match = children[i].id.match(options.format);

if (!match) continue;
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
var child = {
id: encodeURIComponent(match ? match[1] : null),
element: element,
parent: parent,
children: [],
position: parent.children.length,
container: $(children[i]).down(options.treeTag)
d86eb8c1 Marc Dequènes (Duck)
};

b689e231 Marc Dequènes (Duck)
/* Get the element containing the children and recurse over it */
if (child.container)
d86eb8c1 Marc Dequènes (Duck)
this._tree(child.container, options, child);

b689e231 Marc Dequènes (Duck)
parent.children.push (child);
}

d86eb8c1 Marc Dequènes (Duck)
return parent;
b689e231 Marc Dequènes (Duck)
},

tree: function(element) {
element = $(element);
var sortableOptions = this.options(element);
var options = Object.extend({
tag: sortableOptions.tag,
treeTag: sortableOptions.treeTag,
only: sortableOptions.only,
name: element.id,
format: sortableOptions.format
}, arguments[1] || { });
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
var root = {
id: null,
parent: null,
children: [],
container: element,
position: 0
d86eb8c1 Marc Dequènes (Duck)
};

b689e231 Marc Dequènes (Duck)
return Sortable._tree(element, options, root);
},

/* Construct a [i] index for a particular node */
_constructIndex: function(node) {
var index = '';
do {
if (node.id) index = '[' + node.position + ']' + index;
} while ((node = node.parent) != null);
return index;
},

sequence: function(element) {
element = $(element);
var options = Object.extend(this.options(element), arguments[1] || { });
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
return $(this.findElements(element, options) || []).map( function(item) {
return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
});
},

setSequence: function(element, new_sequence) {
element = $(element);
var options = Object.extend(this.options(element), arguments[2] || { });
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
var nodeMap = { };
this.findElements(element, options).each( function(n) {
if (n.id.match(options.format))
nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
n.parentNode.removeChild(n);
});
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
new_sequence.each(function(ident) {
var n = nodeMap[ident];
if (n) {
n[1].appendChild(n[0]);
delete nodeMap[ident];
}
});
},
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
serialize: function(element) {
element = $(element);
var options = Object.extend(Sortable.options(element), arguments[1] || { });
var name = encodeURIComponent(
(arguments[1] && arguments[1].name) ? arguments[1].name : element.id);
d86eb8c1 Marc Dequènes (Duck)
b689e231 Marc Dequènes (Duck)
if (options.tree) {
return Sortable.tree(element, arguments[1]).children.map( function (item) {
d86eb8c1 Marc Dequènes (Duck)
return [name + Sortable._constructIndex(item) + "[id]=" +
b689e231 Marc Dequènes (Duck)
encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
}).flatten().join('&');
} else {
return Sortable.sequence(element, arguments[1]).map( function(item) {
return name + "[]=" + encodeURIComponent(item);
}).join('&');
}
}
d86eb8c1 Marc Dequènes (Duck)
};
b689e231 Marc Dequènes (Duck)
// Returns true if child is contained within element
Element.isParent = function(child, element) {
if (!child.parentNode || child == element) return false;
if (child.parentNode == element) return true;
return Element.isParent(child.parentNode, element);
d86eb8c1 Marc Dequènes (Duck)
};
b689e231 Marc Dequènes (Duck)
d86eb8c1 Marc Dequènes (Duck)
Element.findChildren = function(element, only, recursive, tagName) {
b689e231 Marc Dequènes (Duck)
if(!element.hasChildNodes()) return null;
tagName = tagName.toUpperCase();
if(only) only = [only].flatten();
var elements = [];
$A(element.childNodes).each( function(e) {
if(e.tagName && e.tagName.toUpperCase()==tagName &&
(!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
elements.push(e);
if(recursive) {
var grandchildren = Element.findChildren(e, only, recursive, tagName);
if(grandchildren) elements.push(grandchildren);
}
});

return (elements.length>0 ? elements.flatten() : []);
d86eb8c1 Marc Dequènes (Duck)
};
b689e231 Marc Dequènes (Duck)
Element.offsetSize = function (element, type) {
return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')];
d86eb8c1 Marc Dequènes (Duck)
};