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110 lines
3.0 KiB
JavaScript
110 lines
3.0 KiB
JavaScript
import Component from 'flarum/Component';
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import icon from 'flarum/helpers/icon';
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import listItems from 'flarum/helpers/listItems';
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/**
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* The `Dropdown` component displays a button which, when clicked, shows a
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* dropdown menu beneath it.
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*
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* ### Props
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*
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* - `buttonClassName` A class name to apply to the dropdown toggle button.
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* - `menuClassName` A class name to apply to the dropdown menu.
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* - `icon` The name of an icon to show in the dropdown toggle button.
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* - `caretIcon` The name of an icon to show on the right of the button.
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* - `label` The label of the dropdown toggle button. Defaults to 'Controls'.
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* - `onhide`
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* - `onshow`
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*
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* The children will be displayed as a list inside of the dropdown menu.
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*/
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export default class Dropdown extends Component {
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static initProps(props) {
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super.initProps(props);
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props.className = props.className || '';
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props.buttonClassName = props.buttonClassName || '';
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props.menuClassName = props.menuClassName || '';
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props.label = props.label || '';
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props.caretIcon = typeof props.caretIcon !== 'undefined' ? props.caretIcon : 'caret-down';
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}
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view() {
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const items = this.props.children ? listItems(this.props.children) : [];
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return (
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<div className={'ButtonGroup Dropdown dropdown ' + this.props.className + ' itemCount' + items.length}>
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{this.getButton()}
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{this.getMenu(items)}
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</div>
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);
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}
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config(isInitialized) {
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if (isInitialized) return;
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// When opening the dropdown menu, work out if the menu goes beyond the
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// bottom of the viewport. If it does, we will apply class to make it show
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// above the toggle button instead of below it.
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this.$().on('shown.bs.dropdown', () => {
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const $menu = this.$('.Dropdown-menu').removeClass('Dropdown-menu--top');
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$menu.toggleClass(
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'Dropdown-menu--top',
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$menu.offset().top + $menu.height() > $(window).scrollTop() + $(window).height()
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);
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if (this.props.onshow) {
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this.props.onshow();
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m.redraw();
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}
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});
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this.$().on('hidden.bs.dropdown', () => {
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if (this.props.onhide) {
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this.props.onhide();
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m.redraw();
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}
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});
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}
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/**
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* Get the template for the button.
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*
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* @return {*}
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* @protected
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*/
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getButton() {
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return (
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<button
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className={'Dropdown-toggle ' + this.props.buttonClassName}
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data-toggle="dropdown"
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onclick={this.props.onclick}>
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{this.getButtonContent()}
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</button>
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);
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}
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/**
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* Get the template for the button's content.
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*
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* @return {*}
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* @protected
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*/
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getButtonContent() {
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return [
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this.props.icon ? icon(this.props.icon, {className: 'Button-icon'}) : '',
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<span className="Button-label">{this.props.label}</span>,
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this.props.caretIcon ? icon(this.props.caretIcon, {className: 'Button-caret'}) : ''
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];
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}
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getMenu(items) {
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return (
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<ul className={'Dropdown-menu dropdown-menu ' + this.props.menuClassName}>
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{items}
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</ul>
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);
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}
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}
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