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https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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135 lines
3 KiB
JavaScript
135 lines
3 KiB
JavaScript
/*!
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* VisualEditor UserInterface ButtonWidget class.
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*
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* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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/**
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* Creates an ve.ui.ButtonWidget object.
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*
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* @class
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* @abstract
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* @extends ve.ui.Widget
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* @mixins ve.ui.FlaggableElement
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* @mixins ve.ui.LabeledElement
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*
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* @constructor
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* @param {Object} [config] Configuration options
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* @cfg {number} [tabIndex] Button's tab index
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* @cfg {string} [title=''] Title text
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* @cfg {string} [href] Hyperlink to visit when clicked
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* @cfg {string} [target] Target to open hyperlink in
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*/
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ve.ui.ButtonWidget = function VeUiButtonWidget( config ) {
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// Configuration initialization
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config = ve.extendObject( { 'target': '_blank' }, config );
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// Parent constructor
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ve.ui.Widget.call( this, config );
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// Mixin constructors
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ve.ui.FlaggableElement.call( this, config );
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ve.ui.LabeledElement.call( this, this.$$( '<span>' ), config );
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// Properties
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this.$button = this.$$( '<a>' );
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this.isHyperlink = typeof config.href === 'string';
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this.tabIndex = null;
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// Events
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this.$button.on( {
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'mousedown': ve.bind( this.onMouseDown, this ),
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'mouseup': ve.bind( this.onMouseUp, this ),
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'click': ve.bind( this.onClick, this ),
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'keypress': ve.bind( this.onKeyPress, this )
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} );
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// Initialization
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this.$button
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.addClass( 've-ui-buttonWidget-button' )
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.append( this.$label )
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.attr( {
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'role': 'button',
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'title': config.title,
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'href': config.href,
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'target': config.target
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} )
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.prop( 'tabIndex', config.tabIndex || 0 );
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this.$
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.addClass( 've-ui-buttonWidget' )
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.append( this.$button );
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};
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/* Inheritance */
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OO.inheritClass( ve.ui.ButtonWidget, ve.ui.Widget );
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OO.mixinClass( ve.ui.ButtonWidget, ve.ui.FlaggableElement );
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OO.mixinClass( ve.ui.ButtonWidget, ve.ui.LabeledElement );
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/* Events */
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/**
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* @event click
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*/
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/* Methods */
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/**
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* Handles mouse down events.
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*
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* @method
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* @param {jQuery.Event} e Mouse down event
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*/
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ve.ui.ButtonWidget.prototype.onMouseDown = function () {
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this.tabIndex = this.$button.attr( 'tabIndex' );
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// Remove the tab-index while the button is down to prevent the button from stealing focus
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this.$button.removeAttr( 'tabIndex' );
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};
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/**
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* Handles mouse up events.
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*
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* @method
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* @param {jQuery.Event} e Mouse up event
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*/
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ve.ui.ButtonWidget.prototype.onMouseUp = function () {
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// Restore the tab-index after the button is up to restore the button's accesssibility
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this.$button.attr( 'tabIndex', this.tabIndex );
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};
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/**
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* Handles mouse click events.
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*
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* @method
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* @param {jQuery.Event} e Mouse click event
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* @emits click
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*/
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ve.ui.ButtonWidget.prototype.onClick = function () {
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if ( !this.disabled ) {
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this.emit( 'click' );
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if ( this.isHyperlink ) {
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return true;
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}
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}
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return false;
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};
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/**
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* Handles keypress events.
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*
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* @method
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* @param {jQuery.Event} e Keypress event
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* @emits click
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*/
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ve.ui.ButtonWidget.prototype.onKeyPress = function ( e ) {
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if ( !this.disabled && e.which === ve.Keys.SPACE ) {
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if ( this.isHyperlink ) {
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this.onClick();
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return true;
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}
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}
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return false;
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};
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