mirror of
https://github.com/jquery/jquery-ui.git
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248 lines
6.7 KiB
JavaScript
248 lines
6.7 KiB
JavaScript
/*
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* jQuery UI Menu @VERSION
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*
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* Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*
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* http://docs.jquery.com/UI/Menu
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*
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* Depends:
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* jquery.ui.core.js
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* jquery.ui.widget.js
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*/
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(function($) {
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var idIncrement = 0;
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$.widget("ui.menu", {
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_create: function() {
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var self = this;
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this.menuId = this.element.attr( "id" ) || "ui-menu-" + idIncrement++;
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this.element
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.addClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
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.attr({
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id: this.menuId,
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role: "listbox"
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})
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.bind( "click.menu", function( event ) {
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if ( self.options.disabled ) {
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return false;
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}
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if ( !$( event.target ).closest( ".ui-menu-item a" ).length ) {
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return;
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}
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// temporary
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event.preventDefault();
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self.select( event );
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})
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.bind( "mouseover.menu", function( event ) {
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if ( self.options.disabled ) {
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return;
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}
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var target = $( event.target ).closest( ".ui-menu-item" );
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if ( target.length && target.parent()[0] === self.element[0] ) {
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self.activate( event, target );
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}
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})
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.bind("mouseout.menu", function( event ) {
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if ( self.options.disabled ) {
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return;
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}
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var target = $( event.target ).closest( ".ui-menu-item" );
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if ( target.length && target.parent()[0] === self.element[0] ) {
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self.deactivate( event );
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}
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});
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this.refresh();
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if ( !this.options.input ) {
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this.options.input = this.element.attr( "tabIndex", 0 );
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}
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this.options.input.bind( "keydown.menu", function( event ) {
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if ( self.options.disabled ) {
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return;
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}
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switch ( event.keyCode ) {
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case $.ui.keyCode.PAGE_UP:
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self.previousPage();
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.PAGE_DOWN:
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self.nextPage();
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.UP:
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self.previous();
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.DOWN:
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self.next();
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.ENTER:
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self.select();
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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}
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});
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},
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_destroy: function() {
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this.element
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.removeClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
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.removeAttr( "tabIndex" )
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.removeAttr( "role" )
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.removeAttr( "aria-activedescendant" );
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this.element.children( ".ui-menu-item" )
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.removeClass( "ui-menu-item" )
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.removeAttr( "role" )
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.children( "a" )
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.removeClass( "ui-corner-all" )
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.removeAttr( "tabIndex" )
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.unbind( ".menu" );
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},
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refresh: function() {
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// don't refresh list items that are already adapted
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var items = this.element.children( "li:not(.ui-menu-item):has(a)" )
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.addClass( "ui-menu-item" )
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.attr( "role", "menuitem" );
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items.children( "a" )
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.addClass( "ui-corner-all" )
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.attr( "tabIndex", -1 );
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},
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activate: function( event, item ) {
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var self = this;
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this.deactivate();
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if ( this._hasScroll() ) {
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var borderTop = parseFloat( $.curCSS( this.element[0], "borderTopWidth", true) ) || 0,
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paddingtop = parseFloat( $.curCSS( this.element[0], "paddingTop", true) ) || 0,
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offset = item.offset().top - this.element.offset().top - borderTop - paddingtop,
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scroll = this.element.attr( "scrollTop" ),
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elementHeight = this.element.height(),
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itemHeight = item.height();
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if ( offset < 0 ) {
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this.element.attr( "scrollTop", scroll + offset );
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} else if ( offset + itemHeight > elementHeight ) {
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this.element.attr( "scrollTop", scroll + offset - elementHeight + itemHeight );
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}
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}
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this.active = item.first()
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.children( "a" )
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.addClass( "ui-state-hover" )
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.attr( "id", function(index, id) {
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return (self.itemId = id || self.menuId + "-activedescendant");
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})
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.end();
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// need to remove the attribute before adding it for the screenreader to pick up the change
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// see http://groups.google.com/group/jquery-a11y/msg/929e0c1e8c5efc8f
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this.element.removeAttr("aria-activedescenant").attr("aria-activedescenant", self.itemId);
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this._trigger( "focus", event, { item: item } );
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},
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deactivate: function(event) {
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if (!this.active) {
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return;
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}
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var self = this;
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this.active.children( "a" ).removeClass( "ui-state-hover" );
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// remove only generated id
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$( "#" + self.menuId + "-activedescendant" ).removeAttr( "id" );
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this.element.removeAttr( "aria-activedescenant" );
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this._trigger( "blur", event );
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this.active = null;
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},
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next: function(event) {
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this._move( "next", ".ui-menu-item", "first", event );
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},
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previous: function(event) {
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this._move( "prev", ".ui-menu-item", "last", event );
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},
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first: function() {
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return this.active && !this.active.prevAll( ".ui-menu-item" ).length;
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},
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last: function() {
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return this.active && !this.active.nextAll( ".ui-menu-item" ).length;
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},
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_move: function(direction, edge, filter, event) {
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if ( !this.active ) {
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this.activate( event, this.element.children(edge)[filter]() );
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return;
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}
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var next = this.active[ direction + "All" ]( ".ui-menu-item" ).eq( 0 );
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if ( next.length ) {
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this.activate( event, next );
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} else {
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this.activate( event, this.element.children(edge)[filter]() );
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}
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},
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nextPage: function( event ) {
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if ( this._hasScroll() ) {
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if ( !this.active || this.last() ) {
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this.activate( event, this.element.children( ".ui-menu-item" ).first() );
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return;
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}
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var base = this.active.offset().top,
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height = this.element.height(),
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result;
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this.active.nextAll( ".ui-menu-item" ).each( function() {
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result = $( this );
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return $( this ).offset().top - base - height < 0;
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});
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this.activate( event, result );
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} else {
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this.activate( event, this.element.children( ".ui-menu-item" )
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[ !this.active || this.last() ? "first" : "last" ]() );
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}
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},
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previousPage: function( event ) {
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if ( this._hasScroll() ) {
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if ( !this.active || this.first() ) {
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this.activate( event, this.element.children( ".ui-menu-item" ).last() );
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return;
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}
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var base = this.active.offset().top,
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height = this.element.height(),
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result;
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this.active.prevAll( ".ui-menu-item" ).each( function() {
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result = $( this );
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return $(this).offset().top - base + height > 0;
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});
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this.activate( event, result );
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} else {
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this.activate( event, this.element.children( ".ui-menu-item" )
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[ !this.active || this.first() ? ":last" : ":first" ]() );
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}
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},
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_hasScroll: function() {
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return this.element.height() < this.element.attr( "scrollHeight" );
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},
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select: function( event ) {
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this._trigger( "select", event, { item: this.active } );
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}
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});
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}( jQuery ));
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