mirror of
https://github.com/jquery/jquery-ui.git
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286 lines
9.2 KiB
JavaScript
286 lines
9.2 KiB
JavaScript
/*
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* jQuery UI Droppable @VERSION
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*
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* Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*
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* http://docs.jquery.com/UI/Droppables
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*
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* Depends:
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* jquery.ui.core.js
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* jquery.ui.widget.js
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* jquery.ui.mouse.js
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* jquery.ui.draggable.js
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*/
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(function( $, undefined ) {
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$.widget("ui.droppable", {
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widgetEventPrefix: "drop",
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options: {
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accept: '*',
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activeClass: false,
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addClasses: true,
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greedy: false,
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hoverClass: false,
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scope: 'default',
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tolerance: 'intersect'
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},
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_create: function() {
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var o = this.options, accept = o.accept;
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this.isover = 0; this.isout = 1;
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this.accept = $.isFunction(accept) ? accept : function(d) {
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return d.is(accept);
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};
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//Store the droppable's proportions
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this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
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// Add the reference and positions to the manager
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$.ui.ddmanager.droppables[o.scope] = $.ui.ddmanager.droppables[o.scope] || [];
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$.ui.ddmanager.droppables[o.scope].push(this);
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(o.addClasses && this.element.addClass("ui-droppable"));
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},
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destroy: function() {
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var drop = $.ui.ddmanager.droppables[this.options.scope];
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for ( var i = 0; i < drop.length; i++ )
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if ( drop[i] == this )
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drop.splice(i, 1);
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this.element
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.removeClass("ui-droppable ui-droppable-disabled")
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.removeData("droppable")
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.unbind(".droppable");
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return this;
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},
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_setOption: function(key, value) {
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if(key == 'accept') {
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this.accept = $.isFunction(value) ? value : function(d) {
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return d.is(value);
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};
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}
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$.Widget.prototype._setOption.apply(this, arguments);
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},
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_activate: function(event) {
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var draggable = $.ui.ddmanager.current;
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if(this.options.activeClass) this.element.addClass(this.options.activeClass);
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(draggable && this._trigger('activate', event, this.ui(draggable)));
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},
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_deactivate: function(event) {
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var draggable = $.ui.ddmanager.current;
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if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
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(draggable && this._trigger('deactivate', event, this.ui(draggable)));
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},
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_over: function(event) {
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var draggable = $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
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if (this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
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if(this.options.hoverClass) this.element.addClass(this.options.hoverClass);
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this._trigger('over', event, this.ui(draggable));
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}
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},
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_out: function(event) {
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var draggable = $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
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if (this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
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if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
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this._trigger('out', event, this.ui(draggable));
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}
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},
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_drop: function(event,custom) {
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var draggable = custom || $.ui.ddmanager.current;
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if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element
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var childrenIntersection = false;
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this.element.find(":data(droppable)").not(".ui-draggable-dragging").each(function() {
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var inst = $.data(this, 'droppable');
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if(
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inst.options.greedy
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&& !inst.options.disabled
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&& inst.options.scope == draggable.options.scope
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&& inst.accept.call(inst.element[0], (draggable.currentItem || draggable.element))
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&& $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)
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) { childrenIntersection = true; return false; }
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});
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if(childrenIntersection) return false;
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if(this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
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if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
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if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
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this._trigger('drop', event, this.ui(draggable));
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return this.element;
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}
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return false;
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},
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ui: function(c) {
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return {
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draggable: (c.currentItem || c.element),
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helper: c.helper,
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position: c.position,
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offset: c.positionAbs
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};
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}
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});
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$.extend($.ui.droppable, {
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version: "@VERSION"
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});
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$.ui.intersect = function(draggable, droppable, toleranceMode) {
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if (!droppable.offset) return false;
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var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
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y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
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var l = droppable.offset.left, r = l + droppable.proportions.width,
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t = droppable.offset.top, b = t + droppable.proportions.height;
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switch (toleranceMode) {
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case 'fit':
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return (l <= x1 && x2 <= r
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&& t <= y1 && y2 <= b);
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break;
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case 'intersect':
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return (l < x1 + (draggable.helperProportions.width / 2) // Right Half
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&& x2 - (draggable.helperProportions.width / 2) < r // Left Half
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&& t < y1 + (draggable.helperProportions.height / 2) // Bottom Half
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&& y2 - (draggable.helperProportions.height / 2) < b ); // Top Half
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break;
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case 'pointer':
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var draggableLeft = ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left),
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draggableTop = ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top),
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isOver = $.ui.isOver(draggableTop, draggableLeft, t, l, droppable.proportions.height, droppable.proportions.width);
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return isOver;
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break;
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case 'touch':
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return (
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(y1 >= t && y1 <= b) || // Top edge touching
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(y2 >= t && y2 <= b) || // Bottom edge touching
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(y1 < t && y2 > b) // Surrounded vertically
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) && (
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(x1 >= l && x1 <= r) || // Left edge touching
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(x2 >= l && x2 <= r) || // Right edge touching
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(x1 < l && x2 > r) // Surrounded horizontally
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);
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break;
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default:
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return false;
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break;
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}
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};
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/*
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This manager tracks offsets of draggables and droppables
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*/
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$.ui.ddmanager = {
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current: null,
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droppables: { 'default': [] },
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prepareOffsets: function(t, event) {
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var m = $.ui.ddmanager.droppables[t.options.scope] || [];
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var type = event ? event.type : null; // workaround for #2317
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var list = (t.currentItem || t.element).find(":data(droppable)").andSelf();
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droppablesLoop: for (var i = 0; i < m.length; i++) {
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if(m[i].options.disabled || (t && !m[i].accept.call(m[i].element[0],(t.currentItem || t.element)))) continue; //No disabled and non-accepted
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for (var j=0; j < list.length; j++) { if(list[j] == m[i].element[0]) { m[i].proportions.height = 0; continue droppablesLoop; } }; //Filter out elements in the current dragged item
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m[i].visible = m[i].element.css("display") != "none"; if(!m[i].visible) continue; //If the element is not visible, continue
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if(type == "mousedown") m[i]._activate.call(m[i], event); //Activate the droppable if used directly from draggables
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m[i].offset = m[i].element.offset();
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m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
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}
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},
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drop: function(draggable, event) {
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var dropped = false;
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$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
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if(!this.options) return;
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if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
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dropped = dropped || this._drop.call(this, event);
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if (!this.options.disabled && this.visible && this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
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this.isout = 1; this.isover = 0;
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this._deactivate.call(this, event);
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}
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});
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return dropped;
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},
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drag: function(draggable, event) {
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//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
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if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, event);
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//Run through all droppables and check their positions based on specific tolerance options
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$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
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if(this.options.disabled || this.greedyChild || !this.visible) return;
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var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
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var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
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if(!c) return;
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var parentInstance;
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if (this.options.greedy) {
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var parent = this.element.parents(':data(droppable):eq(0)');
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if (parent.length) {
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parentInstance = $.data(parent[0], 'droppable');
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parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
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}
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}
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// we just moved into a greedy child
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if (parentInstance && c == 'isover') {
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parentInstance['isover'] = 0;
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parentInstance['isout'] = 1;
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parentInstance._out.call(parentInstance, event);
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}
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this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
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this[c == "isover" ? "_over" : "_out"].call(this, event);
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// we just moved out of a greedy child
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if (parentInstance && c == 'isout') {
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parentInstance['isout'] = 0;
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parentInstance['isover'] = 1;
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parentInstance._over.call(parentInstance, event);
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}
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});
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}
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};
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})(jQuery);
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