jquery-ui/ui/jquery.ui.menu.js

505 lines
13 KiB
JavaScript

/*
* jQuery UI Menu @VERSION
*
* Copyright 2011, 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/Menu
*
* Depends:
* jquery.ui.core.js
* jquery.ui.widget.js
*/
(function($) {
var idIncrement = 0;
$.widget( "ui.menu", {
version: "@VERSION",
defaultElement: "<ul>",
delay: 150,
options: {
position: {
my: "left top",
at: "right top"
}
},
_create: function() {
this.activeMenu = this.element;
this.menuId = this.element.attr( "id" ) || "ui-menu-" + idIncrement++;
if ( this.element.find( ".ui-icon" ).length ) {
this.element.addClass( "ui-menu-icons" );
}
this.element
.addClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
.attr({
id: this.menuId,
role: "menu"
})
// need to catch all clicks on disabled menu
// not possible through _bind
.bind( "click.menu", $.proxy( function( event ) {
if ( this.options.disabled ) {
event.preventDefault();
}
}, this));
this._bind({
"click .ui-menu-item:has(a)": function( event ) {
event.stopImmediatePropagation();
var target = $( event.currentTarget );
// it's possible to click an item without hovering it (#7085)
if ( !this.active || ( this.active[ 0 ] !== target[ 0 ] ) ) {
this.focus( event, target );
}
this.select( event );
},
"mouseover .ui-menu-item": function( event ) {
event.stopImmediatePropagation();
var target = $( event.currentTarget );
// Remove ui-state-active class from siblings of the newly focused menu item to avoid a jump caused by adjacent elements both having a class with a border
target.siblings().children( ".ui-state-active" ).removeClass( "ui-state-active" );
this.focus( event, target );
},
"mouseleave": "_mouseleave",
"mouseleave .ui-menu": "_mouseleave",
"mouseout .ui-menu-item": "blur",
"focus": function( event ) {
this.focus( event, $( event.target ).children( ".ui-menu-item:first" ) );
},
"blur": "collapseAll"
});
this.refresh();
this.element.attr( "tabIndex", 0 );
this._bind({
"keydown": function( event ) {
switch ( event.keyCode ) {
case $.ui.keyCode.PAGE_UP:
this.previousPage( event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.PAGE_DOWN:
this.nextPage( event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.HOME:
this._move( "first", "first", event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.END:
this._move( "last", "last", event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.UP:
this.previous( event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.DOWN:
this.next( event );
event.preventDefault();
event.stopImmediatePropagation();
break;
case $.ui.keyCode.LEFT:
if (this.collapse( event )) {
event.stopImmediatePropagation();
}
event.preventDefault();
break;
case $.ui.keyCode.RIGHT:
if (this.expand( event )) {
event.stopImmediatePropagation();
}
event.preventDefault();
break;
case $.ui.keyCode.ENTER:
if ( this.active.children( "a[aria-haspopup='true']" ).length ) {
if ( this.expand( event ) ) {
event.stopImmediatePropagation();
}
}
else {
this.select( event );
event.stopImmediatePropagation();
}
event.preventDefault();
break;
case $.ui.keyCode.ESCAPE:
if ( this.collapse( event ) ) {
event.stopImmediatePropagation();
}
event.preventDefault();
break;
default:
event.stopPropagation();
clearTimeout( this.filterTimer );
var match,
prev = this.previousFilter || "",
character = String.fromCharCode( event.keyCode ),
skip = false;
if (character == prev) {
skip = true;
} else {
character = prev + character;
}
function escape( value ) {
return value.replace( /[-[\]{}()*+?.,\\^$|#\s]/g , "\\$&" );
}
match = this.activeMenu.children( ".ui-menu-item" ).filter( function() {
return new RegExp("^" + escape(character), "i")
.test( $( this ).children( "a" ).text() );
});
match = skip && match.index(this.active.next()) != -1 ? this.active.nextAll(".ui-menu-item") : match;
if ( !match.length ) {
character = String.fromCharCode(event.keyCode);
match = this.activeMenu.children(".ui-menu-item").filter( function() {
return new RegExp("^" + escape(character), "i")
.test( $( this ).children( "a" ).text() );
});
}
if ( match.length ) {
this.focus( event, match );
if (match.length > 1) {
this.previousFilter = character;
this.filterTimer = this._delay( function() {
delete this.previousFilter;
}, 1000 );
} else {
delete this.previousFilter;
}
} else {
delete this.previousFilter;
}
}
}
});
this._bind( document, {
click: function( event ) {
if ( !$( event.target ).closest( ".ui-menu" ).length ) {
this.collapseAll( event );
}
}
});
},
_destroy: function() {
//destroy (sub)menus
this.element
.removeAttr( "aria-activedescendant" )
.find( "ul" )
.andSelf()
.removeClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
.removeAttr( "role" )
.removeAttr( "tabIndex" )
.removeAttr( "aria-labelledby" )
.removeAttr( "aria-expanded" )
.removeAttr( "aria-hidden" )
.show();
//destroy menu items
this.element.find( ".ui-menu-item" )
.unbind( ".menu" )
.removeClass( "ui-menu-item" )
.removeAttr( "role" )
.children( "a" )
.removeClass( "ui-corner-all ui-state-hover" )
.removeAttr( "tabIndex" )
.removeAttr( "role" )
.removeAttr( "aria-haspopup" )
.removeAttr( "id" )
.children( ".ui-icon" )
.remove();
},
refresh: function() {
// initialize nested menus
var submenus = this.element.find( "ul:not(.ui-menu)" )
.addClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
.attr( "role", "menu" )
.hide()
.attr( "aria-hidden", "true" )
.attr( "aria-expanded", "false" );
// don't refresh list items that are already adapted
var menuId = this.menuId;
submenus.add( this.element ).children( "li:not(.ui-menu-item):has(a)" )
.addClass( "ui-menu-item" )
.attr( "role", "presentation" )
.children( "a" )
.addClass( "ui-corner-all" )
.attr( "tabIndex", -1 )
.attr( "role", "menuitem" )
.attr( "id", function( i ) {
return menuId + "-" + i;
});
submenus.each( function() {
var menu = $( this ),
item = menu.prev( "a" );
item.attr( "aria-haspopup", "true" )
.prepend( '<span class="ui-menu-icon ui-icon ui-icon-carat-1-e"></span>' );
menu.attr( "aria-labelledby", item.attr( "id" ) );
});
},
focus: function( event, item ) {
this.blur( event );
if ( this._hasScroll() ) {
var borderTop = parseFloat( $.curCSS( this.activeMenu[0], "borderTopWidth", true ) ) || 0,
paddingTop = parseFloat( $.curCSS( this.activeMenu[0], "paddingTop", true ) ) || 0,
offset = item.offset().top - this.activeMenu.offset().top - borderTop - paddingTop,
scroll = this.activeMenu.scrollTop(),
elementHeight = this.activeMenu.height(),
itemHeight = item.height();
if ( offset < 0 ) {
this.activeMenu.scrollTop( scroll + offset );
} else if ( offset + itemHeight > elementHeight ) {
this.activeMenu.scrollTop( scroll + offset - elementHeight + itemHeight );
}
}
this.active = item.first()
.children( "a" )
.addClass( "ui-state-focus" )
.end();
this.element.attr( "aria-activedescendant", this.active.children("a").attr("id") );
// highlight active parent menu item, if any
this.active.parent().closest(".ui-menu-item").children("a:first").addClass("ui-state-active");
this.timer = this._delay( function() {
this._close();
}, this.delay );
var nested = $( ">ul", item );
if ( nested.length && ( /^mouse/.test( event.type ) ) ) {
this._startOpening(nested);
}
this.activeMenu = item.parent();
this._trigger( "focus", event, { item: item } );
},
blur: function( event ) {
if ( !this.active ) {
return;
}
clearTimeout( this.timer );
this.active.children( "a" ).removeClass( "ui-state-focus" );
this.active = null;
this._trigger( "blur", event, { item: this.active } );
},
_startOpening: function( submenu ) {
clearTimeout( this.timer );
// Don't open if already open fixes a Firefox bug that caused a .5 pixel
// shift in the submenu position when mousing over the carat icon
if ( submenu.attr( "aria-hidden" ) !== "true" ) {
return;
}
this.timer = this._delay( function() {
this._close();
this._open( submenu );
}, this.delay );
},
_open: function( submenu ) {
clearTimeout( this.timer );
this.element
.find( ".ui-menu" )
.not( submenu.parents() )
.hide()
.attr( "aria-hidden", "true" );
var position = $.extend({}, {
of: this.active
}, $.type(this.options.position) == "function"
? this.options.position(this.active)
: this.options.position
);
submenu.show()
.removeAttr( "aria-hidden" )
.attr( "aria-expanded", "true" )
.position( position );
},
collapseAll: function( event ) {
var currentMenu = false;
if ( event ) {
var target = $( event.target );
if ( target.is( "ui.menu" ) ) {
currentMenu = target;
} else if ( target.closest( ".ui-menu" ).length ) {
currentMenu = target.closest( ".ui-menu" );
}
}
this._close( currentMenu );
if( !currentMenu ) {
this.blur( event );
this.activeMenu = this.element;
}
},
_close: function( startMenu ) {
if( !startMenu ) {
startMenu = this.active ? this.active.parent() : this.element;
}
startMenu
.find( "ul" )
.hide()
.attr( "aria-hidden", "true" )
.attr( "aria-expanded", "false" )
.end()
.find( "a.ui-state-active" )
.removeClass( "ui-state-active" );
},
collapse: function( event ) {
var newItem = this.active && this.active.parents("li:not(.ui-menubar-item)").first();
if ( newItem && newItem.length ) {
this._close();
this.focus( event, newItem );
return true;
}
},
expand: function( event ) {
var newItem = this.active && this.active.children("ul").children("li").first();
if ( newItem && newItem.length ) {
this._open( newItem.parent() );
//timeout so Firefox will not hide activedescendant change in expanding submenu from AT
this._delay( function() {
this.focus( event, newItem );
}, 20 );
return true;
}
},
next: function(event) {
this._move( "next", "first", event );
},
previous: function(event) {
this._move( "prev", "last", event );
},
first: function() {
return this.active && !this.active.prevAll( ".ui-menu-item" ).length;
},
last: function() {
return this.active && !this.active.nextAll( ".ui-menu-item" ).length;
},
_move: function( direction, filter, event ) {
if ( !this.active ) {
this.focus( event, this.activeMenu.children( ".ui-menu-item" )[ filter ]() );
return;
}
var next;
if ( direction === "first" || direction === "last" ) {
next = this.active[ direction === "first" ? "prevAll" : "nextAll" ]( ".ui-menu-item" ).eq( -1 );
} else {
next = this.active[ direction + "All" ]( ".ui-menu-item" ).eq( 0 );
}
if ( next.length ) {
this.focus( event, next );
} else {
this.focus( event, this.activeMenu.children( ".ui-menu-item" )[ filter ]() );
}
},
nextPage: function( event ) {
if ( this._hasScroll() ) {
if ( !this.active ) {
this.focus( event, this.activeMenu.children( ".ui-menu-item" ).first() );
return;
}
if ( this.last() ) {
return;
}
var base = this.active.offset().top,
height = this.element.height(),
result;
this.active.nextAll( ".ui-menu-item" ).each( function() {
result = $( this );
return $( this ).offset().top - base - height < 0;
});
this.focus( event, result );
} else {
this.focus( event, this.activeMenu.children( ".ui-menu-item" )
[ !this.active ? "first" : "last" ]() );
}
},
previousPage: function( event ) {
if ( this._hasScroll() ) {
if ( !this.active ) {
this.focus( event, this.activeMenu.children( ".ui-menu-item" ).first() );
return;
}
if ( this.first() ) {
return;
}
var base = this.active.offset().top,
height = this.element.height(),
result;
this.active.prevAll( ".ui-menu-item" ).each( function() {
result = $( this );
return $(this).offset().top - base + height > 0;
});
this.focus( event, result );
} else {
this.focus( event, this.activeMenu.children( ".ui-menu-item" ).first() );
}
},
_hasScroll: function() {
return this.element.height() < this.element.prop( "scrollHeight" );
},
_mouseleave: function( event ) {
this.collapseAll( event );
this.blur();
},
select: function( event ) {
// save active reference before collapseAll triggers blur
var ui = {
item: this.active
};
this.collapseAll( event );
this._trigger( "select", event, ui );
}
});
}( jQuery ));