mirror of
https://github.com/google/blockly.git
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103 lines
2.7 KiB
TypeScript
103 lines
2.7 KiB
TypeScript
/**
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* @license
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* Copyright 2025 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import * as browserEvents from '../browser_events.js';
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import * as touch from '../touch.js';
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import * as dom from '../utils/dom.js';
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import {Svg} from '../utils/svg.js';
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import type {WorkspaceSvg} from '../workspace_svg.js';
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import {CommentBarButton} from './comment_bar_button.js';
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import type {CommentView} from './comment_view.js';
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/**
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* Magic string appended to the comment ID to create a unique ID for this button.
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*/
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export const COMMENT_COLLAPSE_BAR_BUTTON_FOCUS_IDENTIFIER =
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'_collapse_bar_button';
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/**
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* Button that toggles the collapsed state of a comment.
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*/
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export class CollapseCommentBarButton extends CommentBarButton {
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/**
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* Opaque ID used to unbind event handlers during disposal.
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*/
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private readonly bindId: browserEvents.Data;
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/**
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* SVG image displayed on this button.
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*/
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protected override readonly icon: SVGImageElement;
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/**
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* Creates a new CollapseCommentBarButton instance.
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*
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* @param id The ID of this button's parent comment.
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* @param workspace The workspace this button's parent comment is displayed on.
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* @param container An SVG group that this button should be a child of.
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*/
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constructor(
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protected readonly id: string,
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protected readonly workspace: WorkspaceSvg,
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protected readonly container: SVGGElement,
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protected readonly commentView: CommentView,
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) {
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super(id, workspace, container, commentView);
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this.icon = dom.createSvgElement(
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Svg.IMAGE,
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{
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'class': 'blocklyFoldoutIcon',
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'href': `${this.workspace.options.pathToMedia}foldout-icon.svg`,
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'id': `${this.id}${COMMENT_COLLAPSE_BAR_BUTTON_FOCUS_IDENTIFIER}`,
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},
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this.container,
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);
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this.bindId = browserEvents.conditionalBind(
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this.icon,
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'pointerdown',
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this,
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this.performAction.bind(this),
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);
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}
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/**
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* Disposes of this button.
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*/
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dispose() {
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browserEvents.unbind(this.bindId);
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}
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/**
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* Adjusts the positioning of this button within its container.
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*/
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override reposition() {
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const margin = this.getMargin();
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this.icon.setAttribute('y', `${margin}`);
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this.icon.setAttribute('x', `${margin}`);
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}
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/**
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* Toggles the collapsed state of the parent comment.
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*
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* @param e The event that triggered this action.
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*/
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override performAction(e?: Event) {
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touch.clearTouchIdentifier();
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this.getCommentView().bringToFront();
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if (e && e instanceof PointerEvent && browserEvents.isRightButton(e)) {
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e.stopPropagation();
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return;
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}
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this.getCommentView().setCollapsed(!this.getCommentView().isCollapsed());
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this.workspace.hideChaff();
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e?.stopPropagation();
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}
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}
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