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