jquery-ui/ui/widgets/mouse.js

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/*!
* jQuery UI Mouse @VERSION
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* http://jqueryui.com
*
* Copyright jQuery Foundation and other contributors
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* Released under the MIT license.
* http://jquery.org/license
*/
//>>label: Mouse
//>>group: UI Core
//>>description: Abstracts mouse-based interactions to assist in creating certain widgets.
//>>docs: http://api.jqueryui.com/mouse/
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( function( factory ) {
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
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define( [
"jquery",
"../ie",
"../version",
"../widget"
], factory );
} else {
// Browser globals
factory( jQuery );
}
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}( function( $ ) {
var mouseHandled = false;
$( document ).on( "mouseup", function() {
mouseHandled = false;
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} );
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return $.widget( "ui.mouse", {
version: "@VERSION",
options: {
cancel: "input, textarea, button, select, option",
distance: 1,
delay: 0
},
_mouseInit: function() {
var that = this;
this.element
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.on( "mousedown." + this.widgetName, function( event ) {
return that._mouseDown( event );
} )
.on( "click." + this.widgetName, function( event ) {
if ( true === $.data( event.target, that.widgetName + ".preventClickEvent" ) ) {
$.removeData( event.target, that.widgetName + ".preventClickEvent" );
event.stopImmediatePropagation();
return false;
}
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} );
this.started = false;
},
// TODO: make sure destroying one instance of mouse doesn't mess with
// other instances of mouse
_mouseDestroy: function() {
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this.element.off( "." + this.widgetName );
if ( this._mouseMoveDelegate ) {
this.document
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.off( "mousemove." + this.widgetName, this._mouseMoveDelegate )
.off( "mouseup." + this.widgetName, this._mouseUpDelegate );
}
},
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_mouseDown: function( event ) {
// don't let more than one widget handle mouseStart
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if ( mouseHandled ) {
return;
}
this._mouseMoved = false;
// We may have missed mouseup (out of window)
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( this._mouseStarted && this._mouseUp( event ) );
this._mouseDownEvent = event;
var that = this,
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btnIsLeft = ( event.which === 1 ),
// event.target.nodeName works around a bug in IE 8 with
// disabled inputs (#7620)
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elIsCancel = ( typeof this.options.cancel === "string" && event.target.nodeName ? $( event.target ).closest( this.options.cancel ).length : false );
if ( !btnIsLeft || elIsCancel || !this._mouseCapture( event ) ) {
return true;
}
this.mouseDelayMet = !this.options.delay;
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if ( !this.mouseDelayMet ) {
this._mouseDelayTimer = setTimeout( function() {
that.mouseDelayMet = true;
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}, this.options.delay );
}
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if ( this._mouseDistanceMet( event ) && this._mouseDelayMet( event ) ) {
this._mouseStarted = ( this._mouseStart( event ) !== false );
if ( !this._mouseStarted ) {
event.preventDefault();
return true;
}
}
// Click event may never have fired (Gecko & Opera)
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if ( true === $.data( event.target, this.widgetName + ".preventClickEvent" ) ) {
$.removeData( event.target, this.widgetName + ".preventClickEvent" );
}
// These delegates are required to keep context
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this._mouseMoveDelegate = function( event ) {
return that._mouseMove( event );
};
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this._mouseUpDelegate = function( event ) {
return that._mouseUp( event );
};
this.document
.on( "mousemove." + this.widgetName, this._mouseMoveDelegate )
.on( "mouseup." + this.widgetName, this._mouseUpDelegate );
event.preventDefault();
mouseHandled = true;
return true;
},
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_mouseMove: function( event ) {
// Only check for mouseups outside the document if you've moved inside the document
// at least once. This prevents the firing of mouseup in the case of IE<9, which will
// fire a mousemove event if content is placed under the cursor. See #7778
// Support: IE <9
if ( this._mouseMoved ) {
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// IE mouseup check - mouseup happened when mouse was out of window
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if ( $.ui.ie && ( !document.documentMode || document.documentMode < 9 ) && !event.button ) {
return this._mouseUp( event );
// Iframe mouseup check - mouseup occurred in another document
} else if ( !event.which ) {
return this._mouseUp( event );
}
}
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if ( event.which || event.button ) {
this._mouseMoved = true;
}
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if ( this._mouseStarted ) {
this._mouseDrag( event );
return event.preventDefault();
}
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if ( this._mouseDistanceMet( event ) && this._mouseDelayMet( event ) ) {
this._mouseStarted =
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( this._mouseStart( this._mouseDownEvent, event ) !== false );
( this._mouseStarted ? this._mouseDrag( event ) : this._mouseUp( event ) );
}
return !this._mouseStarted;
},
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_mouseUp: function( event ) {
this.document
.off( "mousemove." + this.widgetName, this._mouseMoveDelegate )
.off( "mouseup." + this.widgetName, this._mouseUpDelegate );
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if ( this._mouseStarted ) {
this._mouseStarted = false;
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if ( event.target === this._mouseDownEvent.target ) {
$.data( event.target, this.widgetName + ".preventClickEvent", true );
}
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this._mouseStop( event );
}
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if ( this._mouseDelayTimer ) {
clearTimeout( this._mouseDelayTimer );
delete this._mouseDelayTimer;
}
mouseHandled = false;
return false;
},
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_mouseDistanceMet: function( event ) {
return ( Math.max(
Math.abs( this._mouseDownEvent.pageX - event.pageX ),
Math.abs( this._mouseDownEvent.pageY - event.pageY )
) >= this.options.distance
);
},
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_mouseDelayMet: function( /* event */ ) {
return this.mouseDelayMet;
},
// These are placeholder methods, to be overriden by extending plugin
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_mouseStart: function( /* event */ ) {},
_mouseDrag: function( /* event */ ) {},
_mouseStop: function( /* event */ ) {},
_mouseCapture: function( /* event */ ) { return true; }
} );
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} ) );