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* Copyright 2019 Adobe. All rights reserved.
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import {BaseComponent} from '../../../coral-base-component';
import '../../../coral-component-button';
import '../../../coral-component-anchorbutton';
import '../../../coral-component-popover';
import '../../../coral-component-list';
import {transform, validate, commons} from '../../../coral-utils';
import {Decorator} from '../../../coral-decorator';
/**
Enumeration for {@link SplitButton} variants.
@typedef {Object} SplitButtonVariantEnum
@property {String} DEFAULT
The default button look and feel.
@property {String} CTA
A button that is meant to grab the user's attention.
@property {String} SECONDARY
A button that indicates that the button's action is the secondary action.
*/
const variant = {
DEFAULT: 'default',
CTA: 'cta',
SECONDARY: 'secondary'
};
const CLASSNAME = '_coral-SplitButton';
/**
@class Coral.SplitButton
@classdesc A Split Button component composed of an action and a trigger {@link AnchorButton} or {@link Button}.
These elements should be marked with following attributes:
- <code>[coral-splitbutton-action]</code> for the main action button.
- <code>[coral-splitbutton-trigger]</code> for the trigger button.
@htmltag coral-splitbutton
@extends {HTMLElement}
@extends {BaseComponent}
*/
const SplitButton = Decorator(class extends BaseComponent(HTMLElement) {
/** @ignore */
constructor() {
super();
// Watch for inner button changes
this._observer = new MutationObserver(() => {
this._updateLeftVariant();
this._updateInnerButtons();
this._updateInnerButtonsVariant(this.variant);
});
this._observer.observe(this, {
subtree: true,
childList: true
});
}
/**
The button's variant. See {@link SplitButtonVariantEnum}.
@type {String}
@default SplitButtonVariantEnum.DEFAULT
@htmlattribute variant
@htmlattributereflected
*/
get variant() {
return this._variant || variant.DEFAULT;
}
set variant(value) {
value = transform.string(value).toLowerCase();
this._variant = validate.enumeration(variant)(value) && value || variant.DEFAULT;
this._reflectAttribute('variant', this._variant);
this._updateInnerButtonsVariant(this._variant);
}
_getInnerButtons() {
const action = this.querySelector('[coral-splitbutton-action]');
const trigger = this.querySelector('[coral-splitbutton-trigger]');
return {action, trigger};
}
_updateLeftVariant() {
for (let i = 0 ; i < this.children.length ; i++) {
const child = this.children[i];
if (child.hasAttribute('coral-splitbutton-trigger')) {
this.classList.add('_coral-SplitButton--left');
return;
} else if (child.hasAttribute('coral-splitbutton-action')) {
this.classList.remove('_coral-SplitButton--left');
return;
}
}
}
_updateInnerButtonsVariant(variant) {
const {action, trigger} = this._getInnerButtons();
if (action) {
action.setAttribute('variant', variant);
}
if (triggerE) {
trigger.setAttribute('variant', variant);
}
}
_updateInnerButtons() {
const {action, trigger} = this._getInnerButtons();
if (action) {
action.classList.add('_coral-SplitButton-action');
}
if (trigger) {
trigger.classList.add('_coral-SplitButton-trigger');
// a11y assume a popover is targeting the trigger
trigger.setAttribute('aria-haspopup', 'true');
if (action) {
action.id = action.id || commons.getUID();
trigger.setAttribute('aria-labelledby', action.id);
}
}
}
/**
Returns {@link SplitButton} variants.
@return {SplitButtonVariantEnum}
*/
static get variant() {
return variant;
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat(['variant']);
}
/** @ignore */
render() {
super.render();
this.classList.add(CLASSNAME);
// a11y
this.setAttribute('role', 'group');
// Default reflected attributes
if (!this._variant) {
this.variant = variant.DEFAULT;
}
// Update styles
this._updateLeftVariant();
this._updateInnerButtons();
}
});
export default SplitButton;
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