/*!
 * jQuery UI Mouse 1.8.4
 *
 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Mouse
 *
 * Depends:
 *  jquery.ui.widget.js
 */
(function( $, undefined ) {

$.widget("ui.mouse", {
  options: {
    cancel: ':input,option',
    distance: 1,
    delay: 0
  },
  _mouseInit: function() {
    var self = this;

    this.element
      .bind('mousedown.'+this.widgetName, function(event) {
        return self._mouseDown(event);
      })
      .bind('click.'+this.widgetName, function(event) {
        if(self._preventClickEvent) {
          self._preventClickEvent = false;
          event.stopImmediatePropagation();
          return false;
        }
      });

    this.started = false;
  },

  // TODO: make sure destroying one instance of mouse doesn't mess with
  // other instances of mouse
  _mouseDestroy: function() {
    this.element.unbind('.'+this.widgetName);
  },

  _mouseDown: function(event) {
    // don't let more than one widget handle mouseStart
    // TODO: figure out why we have to use originalEvent
    event.originalEvent = event.originalEvent || {};
    if (event.originalEvent.mouseHandled) { return; }

    // we may have missed mouseup (out of window)
    (this._mouseStarted && this._mouseUp(event));

    this._mouseDownEvent = event;

    var self = this,
      btnIsLeft = (event.which == 1),
      elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
    if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
      return true;
    }

    this.mouseDelayMet = !this.options.delay;
    if (!this.mouseDelayMet) {
      this._mouseDelayTimer = setTimeout(function() {
        self.mouseDelayMet = true;
      }, this.options.delay);
    }

    if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
      this._mouseStarted = (this._mouseStart(event) !== false);
      if (!this._mouseStarted) {
        event.preventDefault();
        return true;
      }
    }

    // these delegates are required to keep context
    this._mouseMoveDelegate = function(event) {
      return self._mouseMove(event);
    };
    this._mouseUpDelegate = function(event) {
      return self._mouseUp(event);
    };
    $(document)
      .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
      .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);

    // preventDefault() is used to prevent the selection of text here -
    // however, in Safari, this causes select boxes not to be selectable
    // anymore, so this fix is needed
    ($.browser.safari || event.preventDefault());

    event.originalEvent.mouseHandled = true;
    return true;
  },

  _mouseMove: function(event) {
    // IE mouseup check - mouseup happened when mouse was out of window
    if ($.browser.msie && !event.button) {
      return this._mouseUp(event);
    }

    if (this._mouseStarted) {
      this._mouseDrag(event);
      return event.preventDefault();
    }

    if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
      this._mouseStarted =
        (this._mouseStart(this._mouseDownEvent, event) !== false);
      (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
    }

    return !this._mouseStarted;
  },

  _mouseUp: function(event) {
    $(document)
      .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
      .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);

    if (this._mouseStarted) {
      this._mouseStarted = false;
      this._preventClickEvent = (event.target == this._mouseDownEvent.target);
      this._mouseStop(event);
    }

    return false;
  },

  _mouseDistanceMet: function(event) {
    return (Math.max(
        Math.abs(this._mouseDownEvent.pageX - event.pageX),
        Math.abs(this._mouseDownEvent.pageY - event.pageY)
      ) >= this.options.distance
    );
  },

  _mouseDelayMet: function(event) {
    return this.mouseDelayMet;
  },

  // These are placeholder methods, to be overriden by extending plugin
  _mouseStart: function(event) {},
  _mouseDrag: function(event) {},
  _mouseStop: function(event) {},
  _mouseCapture: function(event) { return true; }
});

})(jQuery);