mirror of
https://github.com/jquery/jquery-ui.git
synced 2024-10-05 01:44:18 +00:00
531 lines
14 KiB
JavaScript
531 lines
14 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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version: "@VERSION",
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defaultElement: "<ul>",
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delay: 300,
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options: {
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menus: "ul",
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position: {
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my: "left top",
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at: "right top"
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}
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},
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_create: function() {
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this.activeMenu = this.element;
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this.menuId = this.element.attr( "id" ) || "ui-menu-" + idIncrement++;
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if ( this.element.find( ".ui-icon" ).length ) {
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this.element.addClass( "ui-menu-icons" );
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}
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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: "menu"
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})
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// need to catch all clicks on disabled menu
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// not possible through _bind
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.bind( "click.menu", $.proxy( function( event ) {
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if ( this.options.disabled ) {
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event.preventDefault();
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}
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}, this));
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if ( this.options.disabled ) {
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this.element.addClass( "ui-state-disabled" );
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}
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this._bind({
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// Prevent focus from sticking to links inside menu after clicking
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// them (focus should always stay on UL during navigation).
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"mousedown .ui-menu-item > a": function( event ) {
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event.preventDefault();
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},
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"click .ui-menu-item:has(a)": function( event ) {
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event.stopImmediatePropagation();
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//Don't select disabled menu items
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if ( !$( event.target ).closest( ".ui-menu-item" ).is( ".ui-state-disabled" ) ) {
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this.select( event );
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// Redirect focus to the menu with a delay for firefox
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this._delay( function() {
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if ( !this.element.is(":focus") ) {
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this.element.focus();
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}
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}, 20);
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}
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},
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"mouseover .ui-menu-item": function( event ) {
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event.stopImmediatePropagation();
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var target = $( event.currentTarget );
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// 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
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target.siblings().children( ".ui-state-active" ).removeClass( "ui-state-active" );
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this.focus( event, target );
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},
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"mouseleave": "collapseAll",
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"mouseleave .ui-menu": "collapseAll",
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"focus": function( event ) {
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var firstItem = this.element.children( ".ui-menu-item" ).not( ".ui-state-disabled" ).eq( 0 );
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if ( this._hasScroll() && !this.active ) {
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var menu = this.element;
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menu.children().each( function() {
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var currentItem = $( this );
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if ( currentItem.offset().top - menu.offset().top >= 0 ) {
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firstItem = currentItem;
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return false;
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}
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});
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} else if ( this.active ) {
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firstItem = this.active;
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}
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this.focus( event, firstItem );
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},
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blur: function( event ) {
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this._delay( function() {
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if ( ! $.contains( this.element[0], this.document[0].activeElement ) ) {
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this.collapseAll( event );
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}
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}, 0);
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}
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});
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this.refresh();
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this.element.attr( "tabIndex", 0 );
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this._bind({
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"keydown": function( event ) {
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switch ( event.keyCode ) {
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case $.ui.keyCode.PAGE_UP:
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this.previousPage( event );
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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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this.nextPage( event );
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.HOME:
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this._move( "first", "first", event );
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.END:
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this._move( "last", "last", event );
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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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this.previous( event );
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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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this.next( event );
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event.preventDefault();
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event.stopImmediatePropagation();
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break;
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case $.ui.keyCode.LEFT:
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if (this.collapse( event )) {
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event.stopImmediatePropagation();
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}
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event.preventDefault();
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break;
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case $.ui.keyCode.RIGHT:
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if (this.expand( event )) {
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event.stopImmediatePropagation();
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}
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event.preventDefault();
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break;
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case $.ui.keyCode.ENTER:
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if ( this.active.children( "a[aria-haspopup='true']" ).length ) {
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if ( this.expand( event ) ) {
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event.stopImmediatePropagation();
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}
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}
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else {
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this.select( event );
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event.stopImmediatePropagation();
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}
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event.preventDefault();
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break;
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case $.ui.keyCode.ESCAPE:
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if ( this.collapse( event ) ) {
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event.stopImmediatePropagation();
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}
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event.preventDefault();
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break;
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default:
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event.stopPropagation();
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clearTimeout( this.filterTimer );
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var match,
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prev = this.previousFilter || "",
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character = String.fromCharCode( event.keyCode ),
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skip = false;
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if (character == prev) {
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skip = true;
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} else {
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character = prev + character;
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}
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function escape( value ) {
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return value.replace( /[-[\]{}()*+?.,\\^$|#\s]/g , "\\$&" );
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}
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match = this.activeMenu.children( ".ui-menu-item" ).filter( function() {
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return new RegExp("^" + escape(character), "i")
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.test( $( this ).children( "a" ).text() );
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});
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match = skip && match.index(this.active.next()) != -1 ? this.active.nextAll(".ui-menu-item") : match;
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if ( !match.length ) {
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character = String.fromCharCode(event.keyCode);
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match = this.activeMenu.children(".ui-menu-item").filter( function() {
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return new RegExp("^" + escape(character), "i")
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.test( $( this ).children( "a" ).text() );
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});
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}
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if ( match.length ) {
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this.focus( event, match );
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if (match.length > 1) {
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this.previousFilter = character;
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this.filterTimer = this._delay( function() {
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delete this.previousFilter;
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}, 1000 );
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} else {
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delete this.previousFilter;
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}
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} else {
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delete this.previousFilter;
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}
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}
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}
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});
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this._bind( this.document, {
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click: function( event ) {
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if ( !$( event.target ).closest( ".ui-menu" ).length ) {
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this.collapseAll( event );
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}
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}
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});
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},
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_destroy: function() {
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//destroy (sub)menus
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this.element
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.removeAttr( "aria-activedescendant" )
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.find( ".ui-menu" )
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.andSelf()
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.removeClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
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.removeAttr( "role" )
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.removeAttr( "tabIndex" )
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.removeAttr( "aria-labelledby" )
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.removeAttr( "aria-expanded" )
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.removeAttr( "aria-hidden" )
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.show();
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//destroy menu items
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this.element.find( ".ui-menu-item" )
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.unbind( ".menu" )
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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 ui-state-hover" )
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.removeAttr( "tabIndex" )
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.removeAttr( "role" )
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.removeAttr( "aria-haspopup" )
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.removeAttr( "id" )
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.children( ".ui-icon" )
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.remove();
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},
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refresh: function() {
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// initialize nested menus
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var submenus = this.element.find( this.options.menus + ":not( .ui-menu )" )
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.addClass( "ui-menu ui-widget ui-widget-content ui-corner-all" )
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.attr( "role", "menu" )
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.hide()
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.attr( "aria-hidden", "true" )
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.attr( "aria-expanded", "false" );
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// don't refresh list items that are already adapted
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var menuId = this.menuId;
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submenus.add( this.element ).children( ":not( .ui-menu-item ):has( a )" )
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.addClass( "ui-menu-item" )
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.attr( "role", "presentation" )
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.children( "a" )
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.addClass( "ui-corner-all" )
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.attr( "tabIndex", -1 )
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.attr( "role", "menuitem" )
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.attr( "id", function( i ) {
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return menuId + "-" + i;
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});
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submenus.each( function() {
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var menu = $( this ),
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item = menu.prev( "a" );
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item.attr( "aria-haspopup", "true" )
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.prepend( '<span class="ui-menu-icon ui-icon ui-icon-carat-1-e"></span>' );
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menu.attr( "aria-labelledby", item.attr( "id" ) );
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});
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},
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focus: function( event, item ) {
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this.blur( event );
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if ( this._hasScroll() ) {
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var borderTop = parseFloat( $.css( this.activeMenu[0], "borderTopWidth" ) ) || 0,
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paddingTop = parseFloat( $.css( this.activeMenu[0], "paddingTop" ) ) || 0,
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offset = item.offset().top - this.activeMenu.offset().top - borderTop - paddingTop,
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scroll = this.activeMenu.scrollTop(),
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elementHeight = this.activeMenu.height(),
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itemHeight = item.height();
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if ( offset < 0 ) {
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this.activeMenu.scrollTop( scroll + offset );
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} else if ( offset + itemHeight > elementHeight ) {
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this.activeMenu.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-focus" )
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.end();
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this.element.attr( "aria-activedescendant", this.active.children( "a" ).attr( "id" ) );
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// highlight active parent menu item, if any
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this.active.parent().closest( ".ui-menu-item" ).children( "a:first" ).addClass( "ui-state-active" );
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this.timer = this._delay( function() {
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this._close();
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}, this.delay );
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var nested = $( "> .ui-menu", item );
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if ( nested.length && ( /^mouse/.test( event.type ) ) ) {
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this._startOpening(nested);
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}
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this.activeMenu = item.parent();
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this._trigger( "focus", event, { item: item } );
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},
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blur: function( event ) {
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clearTimeout( this.timer );
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if ( !this.active ) {
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return;
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}
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this.active.children( "a" ).removeClass( "ui-state-focus" );
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this.active = null;
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this._trigger( "blur", event, { item: this.active } );
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},
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_startOpening: function( submenu ) {
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clearTimeout( this.timer );
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// Don't open if already open fixes a Firefox bug that caused a .5 pixel
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// shift in the submenu position when mousing over the carat icon
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if ( submenu.attr( "aria-hidden" ) !== "true" ) {
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return;
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}
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this.timer = this._delay( function() {
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this._close();
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this._open( submenu );
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}, this.delay );
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},
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_open: function( submenu ) {
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clearTimeout( this.timer );
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this.element
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.find( ".ui-menu" )
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.not( submenu.parents() )
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.hide()
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.attr( "aria-hidden", "true" );
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var position = $.extend({}, {
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of: this.active
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}, $.type(this.options.position) == "function"
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? this.options.position(this.active)
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: this.options.position
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);
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submenu.show()
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.removeAttr( "aria-hidden" )
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.attr( "aria-expanded", "true" )
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.position( position );
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},
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collapseAll: function( event, all ) {
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clearTimeout( this.timer );
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this.timer = this._delay( function() {
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// if we were passed an event, look for the submenu that contains the event
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var currentMenu = all ? this.element :
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$( event && event.target ).closest( this.element.find( ".ui-menu" ) );
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// if we found no valid submenu ancestor, use the main menu to close all sub menus anyway
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if ( !currentMenu.length ) {
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currentMenu = this.element;
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}
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this._close( currentMenu );
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this.blur( event );
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this.activeMenu = currentMenu;
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}, this.delay);
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},
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// With no arguments, closes the currently active menu - if nothing is active
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// it closes all menus. If passed an argument, it will search for menus BELOW
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_close: function( startMenu ) {
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if ( !startMenu ) {
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startMenu = this.active ? this.active.parent() : this.element;
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}
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startMenu
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.find( ".ui-menu" )
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.hide()
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.attr( "aria-hidden", "true" )
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.attr( "aria-expanded", "false" )
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.end()
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.find( "a.ui-state-active" )
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.removeClass( "ui-state-active" );
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},
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collapse: function( event ) {
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var newItem = this.active && this.active.parent().closest( ".ui-menu-item", this.element );
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if ( newItem && newItem.length ) {
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this._close();
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this.focus( event, newItem );
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return true;
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}
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},
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expand: function( event ) {
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var newItem = this.active && this.active.children( ".ui-menu " ).children( ".ui-menu-item" ).not( ".ui-state-disabled" ).first();
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if ( newItem && newItem.length ) {
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this._open( newItem.parent() );
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//timeout so Firefox will not hide activedescendant change in expanding submenu from AT
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this._delay( function() {
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this.focus( event, newItem );
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}, 20 );
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return true;
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}
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},
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next: function( event ) {
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this._move( "next", "first", event );
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},
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previous: function( event ) {
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this._move( "prev", "last", event );
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},
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isFirstItem: function() {
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return this.active && !this.active.prevAll( ".ui-menu-item" ).length;
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},
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isLastItem: 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, filter, event ) {
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var next;
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if ( this.active ) {
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if ( direction === "first" || direction === "last" ) {
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next = this.active[ direction === "first" ? "prevAll" : "nextAll" ]( ".ui-menu-item" ).not( ".ui-state-disabled" ).eq( -1 );
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} else {
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next = this.active[ direction + "All" ]( ".ui-menu-item" ).not( ".ui-state-disabled" ).eq( 0 );
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}
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}
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if ( !next || !next.length || !this.active ) {
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next = this.activeMenu.children( ".ui-menu-item" )[ filter ]();
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}
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this.focus( event, next );
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if ( next.is( ".ui-state-disabled" ) ) {
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this._move( direction, filter, event );
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}
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},
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nextPage: function( event ) {
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if ( !this.active ) {
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this._move( "next", "first", event );
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return;
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}
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if ( this.isLastItem() ) {
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return;
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}
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if ( this._hasScroll() ) {
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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" ).not( ".ui-state-disabled" ).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.focus( event, result );
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} else {
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this.focus( event, this.activeMenu.children( ".ui-menu-item" ).not( ".ui-state-disabled" )
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[ !this.active ? "first" : "last" ]() );
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}
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},
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previousPage: function( event ) {
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if ( !this.active ) {
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this._move( "next", "first", event );
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return;
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}
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if ( this.isFirstItem() ) {
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return;
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}
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if ( this._hasScroll() ) {
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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" ).not( ".ui-state-disabled" ).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.focus( event, result );
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} else {
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this.focus( event, this.activeMenu.children( ".ui-menu-item" ).not( ".ui-state-disabled" ).first() );
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}
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},
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_hasScroll: function() {
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return this.element.outerHeight() < this.element.prop( "scrollHeight" );
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},
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select: function( event ) {
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// save active reference before collapseAll triggers blur
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var ui = {
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item: this.active
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};
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this.collapseAll( event, true );
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this._trigger( "select", event, ui );
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}
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});
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}( jQuery ));
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