/*!
 * jQuery UI Selectable 1.13.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Selectable
//>>group: Interactions
//>>description: Allows groups of elements to be selected with the mouse.
//>>docs: http://api.jqueryui.com/selectable/
//>>demos: http://jqueryui.com/selectable/
//>>css.structure: ../../themes/base/selectable.css

( function( factory ) {
"use strict";

if ( typeof define === "function" && define.amd ) {

// AMD. Register as an anonymous module.
define( [
"jquery",
"./mouse",
"./core"
], factory );
} else {

// Browser globals
factory( jQuery );
}
} )( function( $ ) {
"use strict";

return $.widget( "ui.selectable", $.ui.mouse, {
version: "1.13.1",
options: {
appendTo: "body",
autoRefresh: true,
distance: 0,
filter: "*",
tolerance: "touch",

// Callbacks
selected: null,
selecting: null,
start: null,
stop: null,
unselected: null,
unselecting: null
},
_create: function() {
var that = this;

this._addClass( "ui-selectable" );

this.dragged = false;

// Cache selectee children based on filter
this.refresh = function() {
that.elementPos = $( that.element[ 0 ] ).offset();
that.selectees = $( that.options.filter, that.element[ 0 ] );
that._addClass( that.selectees, "ui-selectee" );
that.selectees.each( function() {
var $this = $( this ),
selecteeOffset = $this.offset(),
pos = {
left: selecteeOffset.left - that.elementPos.left,
top: selecteeOffset.top - that.elementPos.top
};
$.data( this, "selectable-item", {
element: this,
$element: $this,
left: pos.left,
top: pos.top,
right: pos.left + $this.outerWidth(),
bottom: pos.top + $this.outerHeight(),
startselected: false,
selected: $this.hasClass( "ui-selected" ),
selecting: $this.hasClass( "ui-selecting" ),
unselecting: $this.hasClass( "ui-unselecting" )
} );
} );
};
this.refresh();

this._mouseInit();

this.helper = $( "<div>" );
this._addClass( this.helper, "ui-selectable-helper" );
},

_destroy: function() {
this.selectees.removeData( "selectable-item" );
this._mouseDestroy();
},

_mouseStart: function( event ) {
var that = this,
options = this.options;

this.opos = [ event.pageX, event.pageY ];
this.elementPos = $( this.element[ 0 ] ).offset();

if ( this.options.disabled ) {
return;
}

this.selectees = $( options.filter, this.element[ 0 ] );

this._trigger( "start", event );

$( options.appendTo ).append( this.helper );

// position helper (lasso)
this.helper.css( {
"left": event.pageX,
"top": event.pageY,
"width": 0,
"height": 0
} );

if ( options.autoRefresh ) {
this.refresh();
}

this.selectees.filter( ".ui-selected" ).each( function() {
var selectee = $.data( this, "selectable-item" );
selectee.startselected = true;
if ( !event.metaKey && !event.ctrlKey ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;
that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;

// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
} );

$( event.target ).parents().addBack().each( function() {
var doSelect,
selectee = $.data( this, "selectable-item" );
if ( selectee ) {
doSelect = ( !event.metaKey && !event.ctrlKey ) ||
!selectee.$element.hasClass( "ui-selected" );
that._removeClass( selectee.$element, doSelect ? "ui-unselecting" : "ui-selected" )
._addClass( selectee.$element, doSelect ? "ui-selecting" : "ui-unselecting" );
selectee.unselecting = !doSelect;
selectee.selecting = doSelect;
selectee.selected = doSelect;

// selectable (UN)SELECTING callback
if ( doSelect ) {
that._trigger( "selecting", event, {
selecting: selectee.element
} );
} else {
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
return false;
}
} );

},

_mouseDrag: function( event ) {

this.dragged = true;

if ( this.options.disabled ) {
return;
}

var tmp,
that = this,
options = this.options,
x1 = this.opos[ 0 ],
y1 = this.opos[ 1 ],
x2 = event.pageX,
y2 = event.pageY;

if ( x1 > x2 ) {
tmp = x2; x2 = x1; x1 = tmp;
}
if ( y1 > y2 ) {
tmp = y2; y2 = y1; y1 = tmp;
}
this.helper.css( { left: x1, top: y1, width: x2 - x1, height: y2 - y1 } );

this.selectees.each( function() {
var selectee = $.data( this, "selectable-item" ),
hit = false,
offset = {};

//prevent helper from being selected if appendTo: selectable
if ( !selectee || selectee.element === that.element[ 0 ] ) {
return;
}

offset.left   = selectee.left   + that.elementPos.left;
offset.right  = selectee.right  + that.elementPos.left;
offset.top    = selectee.top    + that.elementPos.top;
offset.bottom = selectee.bottom + that.elementPos.top;

if ( options.tolerance === "touch" ) {
hit = ( !( offset.left > x2 || offset.right < x1 || offset.top > y2 ||
offset.bottom < y1 ) );
} else if ( options.tolerance === "fit" ) {
hit = ( offset.left > x1 && offset.right < x2 && offset.top > y1 &&
offset.bottom < y2 );
}

if ( hit ) {

// SELECT
if ( selectee.selected ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;
}
if ( selectee.unselecting ) {
that._removeClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = false;
}
if ( !selectee.selecting ) {
that._addClass( selectee.$element, "ui-selecting" );
selectee.selecting = true;

// selectable SELECTING callback
that._trigger( "selecting", event, {
selecting: selectee.element
} );
}
} else {

// UNSELECT
if ( selectee.selecting ) {
if ( ( event.metaKey || event.ctrlKey ) && selectee.startselected ) {
that._removeClass( selectee.$element, "ui-selecting" );
selectee.selecting = false;
that._addClass( selectee.$element, "ui-selected" );
selectee.selected = true;
} else {
that._removeClass( selectee.$element, "ui-selecting" );
selectee.selecting = false;
if ( selectee.startselected ) {
that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;
}

// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
}
if ( selectee.selected ) {
if ( !event.metaKey && !event.ctrlKey && !selectee.startselected ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;

that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;

// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
}
}
} );

return false;
},

_mouseStop: function( event ) {
var that = this;

this.dragged = false;

$( ".ui-unselecting", this.element[ 0 ] ).each( function() {
var selectee = $.data( this, "selectable-item" );
that._removeClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = false;
selectee.startselected = false;
that._trigger( "unselected", event, {
unselected: selectee.element
} );
} );
$( ".ui-selecting", this.element[ 0 ] ).each( function() {
var selectee = $.data( this, "selectable-item" );
that._removeClass( selectee.$element, "ui-selecting" )
._addClass( selectee.$element, "ui-selected" );
selectee.selecting = false;
selectee.selected = true;
selectee.startselected = true;
that._trigger( "selected", event, {
selected: selectee.element
} );
} );
this._trigger( "stop", event );

this.helper.remove();

return false;
}

} );

} );