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   1  /*!
   2   * jQuery UI Mouse 1.9.2
   3   * http://jqueryui.com
   4   *
   5   * Copyright 2012 jQuery Foundation and other contributors
   6   * Released under the MIT license.
   7   * http://jquery.org/license
   8   *
   9   * http://api.jqueryui.com/mouse/
  10   *
  11   * Depends:
  12   *    jquery.ui.widget.js
  13   */
  14  (function( $, undefined ) {
  15  
  16  var mouseHandled = false;
  17  $( document ).mouseup( function( e ) {
  18      mouseHandled = false;
  19  });
  20  
  21  $.widget("ui.mouse", {
  22      version: "1.9.2",
  23      options: {
  24          cancel: 'input,textarea,button,select,option',
  25          distance: 1,
  26          delay: 0
  27      },
  28      _mouseInit: function() {
  29          var that = this;
  30  
  31          this.element
  32              .bind('mousedown.'+this.widgetName, function(event) {
  33                  return that._mouseDown(event);
  34              })
  35              .bind('click.'+this.widgetName, function(event) {
  36                  if (true === $.data(event.target, that.widgetName + '.preventClickEvent')) {
  37                      $.removeData(event.target, that.widgetName + '.preventClickEvent');
  38                      event.stopImmediatePropagation();
  39                      return false;
  40                  }
  41              });
  42  
  43          this.started = false;
  44      },
  45  
  46      // TODO: make sure destroying one instance of mouse doesn't mess with
  47      // other instances of mouse
  48      _mouseDestroy: function() {
  49          this.element.unbind('.'+this.widgetName);
  50          if ( this._mouseMoveDelegate ) {
  51              $(document)
  52                  .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
  53                  .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
  54          }
  55      },
  56  
  57      _mouseDown: function(event) {
  58          // don't let more than one widget handle mouseStart
  59          if( mouseHandled ) { return; }
  60  
  61          // we may have missed mouseup (out of window)
  62          (this._mouseStarted && this._mouseUp(event));
  63  
  64          this._mouseDownEvent = event;
  65  
  66          var that = this,
  67              btnIsLeft = (event.which === 1),
  68              // event.target.nodeName works around a bug in IE 8 with
  69              // disabled inputs (#7620)
  70              elIsCancel = (typeof this.options.cancel === "string" && event.target.nodeName ? $(event.target).closest(this.options.cancel).length : false);
  71          if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
  72              return true;
  73          }
  74  
  75          this.mouseDelayMet = !this.options.delay;
  76          if (!this.mouseDelayMet) {
  77              this._mouseDelayTimer = setTimeout(function() {
  78                  that.mouseDelayMet = true;
  79              }, this.options.delay);
  80          }
  81  
  82          if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
  83              this._mouseStarted = (this._mouseStart(event) !== false);
  84              if (!this._mouseStarted) {
  85                  event.preventDefault();
  86                  return true;
  87              }
  88          }
  89  
  90          // Click event may never have fired (Gecko & Opera)
  91          if (true === $.data(event.target, this.widgetName + '.preventClickEvent')) {
  92              $.removeData(event.target, this.widgetName + '.preventClickEvent');
  93          }
  94  
  95          // these delegates are required to keep context
  96          this._mouseMoveDelegate = function(event) {
  97              return that._mouseMove(event);
  98          };
  99          this._mouseUpDelegate = function(event) {
 100              return that._mouseUp(event);
 101          };
 102          $(document)
 103              .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 104              .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 105  
 106          event.preventDefault();
 107  
 108          mouseHandled = true;
 109          return true;
 110      },
 111  
 112      _mouseMove: function(event) {
 113          // IE mouseup check - mouseup happened when mouse was out of window
 114          if ($.ui.ie && !(document.documentMode >= 9) && !event.button) {
 115              return this._mouseUp(event);
 116          }
 117  
 118          if (this._mouseStarted) {
 119              this._mouseDrag(event);
 120              return event.preventDefault();
 121          }
 122  
 123          if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
 124              this._mouseStarted =
 125                  (this._mouseStart(this._mouseDownEvent, event) !== false);
 126              (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
 127          }
 128  
 129          return !this._mouseStarted;
 130      },
 131  
 132      _mouseUp: function(event) {
 133          $(document)
 134              .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 135              .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 136  
 137          if (this._mouseStarted) {
 138              this._mouseStarted = false;
 139  
 140              if (event.target === this._mouseDownEvent.target) {
 141                  $.data(event.target, this.widgetName + '.preventClickEvent', true);
 142              }
 143  
 144              this._mouseStop(event);
 145          }
 146  
 147          return false;
 148      },
 149  
 150      _mouseDistanceMet: function(event) {
 151          return (Math.max(
 152                  Math.abs(this._mouseDownEvent.pageX - event.pageX),
 153                  Math.abs(this._mouseDownEvent.pageY - event.pageY)
 154              ) >= this.options.distance
 155          );
 156      },
 157  
 158      _mouseDelayMet: function(event) {
 159          return this.mouseDelayMet;
 160      },
 161  
 162      // These are placeholder methods, to be overriden by extending plugin
 163      _mouseStart: function(event) {},
 164      _mouseDrag: function(event) {},
 165      _mouseStop: function(event) {},
 166      _mouseCapture: function(event) { return true; }
 167  });
 168  
 169  })(jQuery);