/
buttonview.ts
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/
buttonview.ts
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/**
* @license Copyright (c) 2003-2024, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module ui/button/buttonview
*/
import View from '../view.js';
import IconView from '../icon/iconview.js';
import type { TemplateDefinition } from '../template.js';
import type ViewCollection from '../viewcollection.js';
import type { default as Button, ButtonExecuteEvent } from './button.js';
import type ButtonLabel from './buttonlabel.js';
import ButtonLabelView from './buttonlabelview.js';
import {
env,
getEnvKeystrokeText,
uid,
delay,
type Locale,
type DelayedFunc
} from '@ckeditor/ckeditor5-utils';
import '../../theme/components/button/button.css';
/**
* The button view class.
*
* ```ts
* const view = new ButtonView();
*
* view.set( {
* label: 'A button',
* keystroke: 'Ctrl+B',
* tooltip: true,
* withText: true
* } );
*
* view.render();
*
* document.body.append( view.element );
* ```
*/
export default class ButtonView extends View<HTMLButtonElement> implements Button {
/**
* Collection of the child views inside of the button {@link #element}.
*/
public readonly children: ViewCollection;
/**
* Label of the button view. Its text is configurable using the {@link #label label attribute}.
*
* If not configured otherwise in the `constructor()`, by default the label is an instance
* of {@link module:ui/button/buttonlabelview~ButtonLabelView}.
*/
public readonly labelView: ButtonLabel;
/**
* The icon view of the button. Will be added to {@link #children} when the
* {@link #icon icon attribute} is defined.
*/
public readonly iconView: IconView;
/**
* A view displaying the keystroke of the button next to the {@link #labelView label}.
* Added to {@link #children} when the {@link #withKeystroke `withKeystroke` attribute}
* is defined.
*/
public readonly keystrokeView: View;
/**
* @inheritDoc
*/
declare public class: string | undefined;
/**
* @inheritDoc
*/
declare public labelStyle: string | undefined;
/**
* @inheritDoc
*/
declare public icon: string | undefined;
/**
* @inheritDoc
*/
declare public isEnabled: boolean;
/**
* @inheritDoc
*/
declare public isOn: boolean;
/**
* @inheritDoc
*/
declare public isVisible: boolean;
/**
* @inheritDoc
*/
declare public isToggleable: boolean;
/**
* @inheritDoc
*/
declare public keystroke: string | undefined;
/**
* @inheritDoc
*/
declare public label: string | undefined;
/**
* @inheritDoc
*/
declare public tabindex: number;
/**
* @inheritDoc
*/
declare public tooltip: Button[ 'tooltip' ];
/**
* @inheritDoc
*/
declare public tooltipPosition: Button[ 'tooltipPosition' ];
/**
* @inheritDoc
*/
declare public type: Button[ 'type' ];
/**
* @inheritDoc
*/
declare public withText: boolean;
/**
* @inheritDoc
*/
declare public withKeystroke: boolean;
/**
* @inheritDoc
*/
declare public role: string | undefined;
/**
* @inheritDoc
*/
declare public ariaChecked: boolean | undefined;
/**
* @inheritDoc
*/
declare public ariaLabel?: string | undefined;
/**
* @inheritDoc
*/
declare public ariaLabelledBy: string | undefined;
/**
* Tooltip of the button bound to the template.
*
* @see #tooltip
* @see module:ui/button/buttonview~ButtonView#_getTooltipString
* @internal
* @observable
*/
declare public _tooltipString: string;
/**
* Delayed focus function for focus handling in Safari.
*/
private _focusDelayed: DelayedFunc<() => void> | null = null;
/**
* Creates an instance of the button view class.
*
* @param locale The {@link module:core/editor/editor~Editor#locale} instance.
* @param labelView The instance of the button's label. If not provided, an instance of
* {@link module:ui/button/buttonlabelview~ButtonLabelView} is used.
*/
constructor( locale?: Locale, labelView: ButtonLabel = new ButtonLabelView() ) {
super( locale );
const bind = this.bindTemplate;
const ariaLabelUid = uid();
// Implement the Button interface.
this.set( 'ariaLabel', undefined );
this.set( 'ariaLabelledBy', `ck-editor__aria-label_${ ariaLabelUid }` );
this.set( 'class', undefined );
this.set( 'labelStyle', undefined );
this.set( 'icon', undefined );
this.set( 'isEnabled', true );
this.set( 'isOn', false );
this.set( 'isVisible', true );
this.set( 'isToggleable', false );
this.set( 'keystroke', undefined );
this.set( 'label', undefined );
this.set( 'role', undefined );
this.set( 'tabindex', -1 );
this.set( 'tooltip', false );
this.set( 'tooltipPosition', 's' );
this.set( 'type', 'button' );
this.set( 'withText', false );
this.set( 'withKeystroke', false );
this.children = this.createCollection();
this.labelView = this._setupLabelView( labelView );
this.iconView = new IconView();
this.iconView.extendTemplate( {
attributes: {
class: 'ck-button__icon'
}
} );
this.keystrokeView = this._createKeystrokeView();
this.bind( '_tooltipString' ).to(
this, 'tooltip',
this, 'label',
this, 'keystroke',
this._getTooltipString.bind( this )
);
const template: TemplateDefinition & { on: object } = {
tag: 'button',
attributes: {
class: [
'ck',
'ck-button',
bind.to( 'class' ),
bind.if( 'isEnabled', 'ck-disabled', value => !value ),
bind.if( 'isVisible', 'ck-hidden', value => !value ),
bind.to( 'isOn', value => value ? 'ck-on' : 'ck-off' ),
bind.if( 'withText', 'ck-button_with-text' ),
bind.if( 'withKeystroke', 'ck-button_with-keystroke' )
],
role: bind.to( 'role' ),
type: bind.to( 'type', value => value ? value : 'button' ),
tabindex: bind.to( 'tabindex' ),
'aria-checked': bind.to( 'ariaChecked' ),
'aria-label': bind.to( 'ariaLabel' ),
'aria-labelledby': bind.to( 'ariaLabelledBy' ),
'aria-disabled': bind.if( 'isEnabled', true, value => !value ),
'aria-pressed': bind.to( 'isOn', value => this.isToggleable ? String( !!value ) : false ),
'data-cke-tooltip-text': bind.to( '_tooltipString' ),
'data-cke-tooltip-position': bind.to( 'tooltipPosition' )
},
children: this.children,
on: {
click: bind.to( evt => {
// We can't make the button disabled using the disabled attribute, because it won't be focusable.
// Though, shouldn't this condition be moved to the button controller?
if ( this.isEnabled ) {
this.fire<ButtonExecuteEvent>( 'execute' );
} else {
// Prevent the default when button is disabled, to block e.g.
// automatic form submitting. See ckeditor/ckeditor5-link#74.
evt.preventDefault();
}
} )
}
};
// On Safari we have to force the focus on a button on click as it's the only browser
// that doesn't do that automatically. See #12115.
if ( env.isSafari ) {
if ( !this._focusDelayed ) {
this._focusDelayed = delay( () => this.focus(), 0 );
}
template.on.mousedown = bind.to( () => {
this._focusDelayed!();
} );
template.on.mouseup = bind.to( () => {
this._focusDelayed!.cancel();
} );
}
this.setTemplate( template );
}
/**
* @inheritDoc
*/
public override render(): void {
super.render();
if ( this.icon ) {
this.iconView.bind( 'content' ).to( this, 'icon' );
this.children.add( this.iconView );
}
this.children.add( this.labelView );
if ( this.withKeystroke && this.keystroke ) {
this.children.add( this.keystrokeView );
}
}
/**
* Focuses the {@link #element} of the button.
*/
public focus(): void {
this.element!.focus();
}
/**
* @inheritDoc
*/
public override destroy(): void {
if ( this._focusDelayed ) {
this._focusDelayed.cancel();
}
super.destroy();
}
/**
* Binds the label view instance it with button attributes.
*/
private _setupLabelView( labelView: ButtonLabelView ) {
labelView.bind( 'text', 'style', 'id' ).to( this, 'label', 'labelStyle', 'ariaLabelledBy' );
return labelView;
}
/**
* Creates a view that displays a keystroke next to a {@link #labelView label }
* and binds it with button attributes.
*/
private _createKeystrokeView() {
const keystrokeView = new View();
keystrokeView.setTemplate( {
tag: 'span',
attributes: {
class: [
'ck',
'ck-button__keystroke'
]
},
children: [
{
text: this.bindTemplate.to( 'keystroke', text => getEnvKeystrokeText( text! ) )
}
]
} );
return keystrokeView;
}
/**
* Gets the text for the tooltip from the combination of
* {@link #tooltip}, {@link #label} and {@link #keystroke} attributes.
*
* @see #tooltip
* @see #_tooltipString
* @param tooltip Button tooltip.
* @param label Button label.
* @param keystroke Button keystroke.
*/
private _getTooltipString(
tooltip: Button[ 'tooltip' ],
label: string | undefined,
keystroke: string | undefined
): string {
if ( tooltip ) {
if ( typeof tooltip == 'string' ) {
return tooltip;
} else {
if ( keystroke ) {
keystroke = getEnvKeystrokeText( keystroke );
}
if ( tooltip instanceof Function ) {
return tooltip( label!, keystroke );
} else {
return `${ label }${ keystroke ? ` (${ keystroke })` : '' }`;
}
}
}
return '';
}
}