@smui/icon-button
Version:
Svelte Material UI - Icon Button
94 lines • 3.78 kB
JavaScript
/**
* @license
* Copyright 2018 Google Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import { MDCFoundation } from '@smui/common/base/foundation';
import { cssClasses, strings } from './constants';
/** MDC Icon Button Toggle Foundation */
export class MDCIconButtonToggleFoundation extends MDCFoundation {
static get cssClasses() {
return cssClasses;
}
static get strings() {
return strings;
}
static get defaultAdapter() {
return {
addClass: () => undefined,
hasClass: () => false,
notifyChange: () => undefined,
removeClass: () => undefined,
getAttr: () => null,
setAttr: () => undefined,
};
}
constructor(adapter) {
super(Object.assign(Object.assign({}, MDCIconButtonToggleFoundation.defaultAdapter), adapter));
/**
* Whether the icon button has an aria-label that changes depending on
* toggled state.
*/
this.hasToggledAriaLabel = false;
}
init() {
const ariaLabelOn = this.adapter.getAttr(strings.DATA_ARIA_LABEL_ON);
const ariaLabelOff = this.adapter.getAttr(strings.DATA_ARIA_LABEL_OFF);
if (ariaLabelOn && ariaLabelOff) {
if (this.adapter.getAttr(strings.ARIA_PRESSED) !== null) {
throw new Error('MDCIconButtonToggleFoundation: Button should not set ' +
'`aria-pressed` if it has a toggled ARIA label.');
}
this.hasToggledAriaLabel = true;
}
else {
this.adapter.setAttr(strings.ARIA_PRESSED, String(this.isOn()));
}
}
handleClick() {
this.toggle();
this.adapter.notifyChange({ isOn: this.isOn() });
}
isOn() {
return this.adapter.hasClass(cssClasses.ICON_BUTTON_ON);
}
toggle(isOn = !this.isOn()) {
// Toggle UI based on state.
if (isOn) {
this.adapter.addClass(cssClasses.ICON_BUTTON_ON);
}
else {
this.adapter.removeClass(cssClasses.ICON_BUTTON_ON);
}
// Toggle aria attributes based on state.
if (this.hasToggledAriaLabel) {
const ariaLabel = isOn
? this.adapter.getAttr(strings.DATA_ARIA_LABEL_ON)
: this.adapter.getAttr(strings.DATA_ARIA_LABEL_OFF);
this.adapter.setAttr(strings.ARIA_LABEL, ariaLabel || '');
}
else {
this.adapter.setAttr(strings.ARIA_PRESSED, `${isOn}`);
}
}
}
// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.
export default MDCIconButtonToggleFoundation;
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