carbon-components
Version:
The Carbon Design System is IBM’s open-source design system for products and experiences.
98 lines (85 loc) • 3.05 kB
JavaScript
/**
* Copyright IBM Corp. 2016, 2018
*
* This source code is licensed under the Apache-2.0 license found in the
* LICENSE file in the root directory of this source tree.
*/
import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import handles from '../../globals/js/mixins/handles';
class CodeSnippet extends mixin(
createComponent,
initComponentBySearch,
handles
) {
/**
* CodeSnippet UI.
* @extends CreateComponent
* @extends InitComponentBySearch
* @extends Handles
* @param {HTMLElement} element The element working as a CodeSnippet UI.
*/
constructor(element, options) {
super(element, options);
this._initCodeSnippet();
this.element
.querySelector(this.options.classExpandBtn)
.addEventListener('click', (evt) => this._handleClick(evt));
}
_handleClick() {
const expandBtn = this.element.querySelector(this.options.classExpandText);
this.element.classList.toggle(this.options.classExpanded);
if (this.element.classList.contains(this.options.classExpanded)) {
expandBtn.textContent = expandBtn.getAttribute(
this.options.attribShowLessText
);
} else {
expandBtn.textContent = expandBtn.getAttribute(
this.options.attribShowMoreText
);
}
}
_initCodeSnippet() {
const expandBtn = this.element.querySelector(this.options.classExpandText);
if (!expandBtn) {
throw new TypeError('Cannot find the expand button.');
}
expandBtn.textContent = expandBtn.getAttribute(
this.options.attribShowMoreText
);
if (this.element.offsetHeight < this.options.minHeight) {
this.element.classList.add(this.options.classHideExpand);
}
}
/**
* The map associating DOM element and code snippet UI instance.
* @member CodeSnippet.components
* @type {WeakMap}
*/
static components /* #__PURE_CLASS_PROPERTY__ */ = new WeakMap();
/**
* The component options.
* If `options` is specified in the constructor, {@linkcode CodeSnippet.create .create()},
* or {@linkcode CodeSnippet.init .init()},
* properties in this object are overridden for the instance being create and how {@linkcode CodeSnippet.init .init()} works.
* @member CodeSnippet.options
* @type {object}
* @property {string} selectorInit The data attribute to find code snippet UIs.
*/
static get options() {
const { prefix } = settings;
return {
selectorInit: '[data-code-snippet]',
attribShowMoreText: 'data-show-more-text',
attribShowLessText: 'data-show-less-text',
minHeight: 288,
classExpanded: `${prefix}--snippet--expand`,
classExpandBtn: `.${prefix}--snippet-btn--expand`,
classExpandText: `.${prefix}--snippet-btn--text`,
classHideExpand: `${prefix}--snippet-btn--expand--hide`,
};
}
}
export default CodeSnippet;