mirror of
https://github.com/google/blockly.git
synced 2026-05-13 07:30:10 +02:00
Beka Westberg
f678531389
* chore: remove AnyDuringMigration from events * chore: format * chore: lint * chore: fix tests * fix: correct types for JSON properties * chore: fix tests * refactor: replace exclamation markers with errors * chore: fix build and tests * chore: set event types as members, rather than in constructor * chore: update comment * chore: export new types * chore: format * chore: remove unnecessary override * chore: change how we're overriding isBlank * chore: remove unnecessary ? * chore: remove non-null assertion in block move event * chore: format * chore: revert changes to isNull * chore: format
119 lines
2.5 KiB
TypeScript
119 lines
2.5 KiB
TypeScript
/**
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* @license
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* Copyright 2018 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* Abstract class for events fired as a result of actions in
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* Blockly's editor.
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*
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* @class
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*/
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import * as goog from '../../closure/goog/goog.js';
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goog.declareModuleId('Blockly.Events.Abstract');
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import * as common from '../common.js';
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import type {Workspace} from '../workspace.js';
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import * as eventUtils from './utils.js';
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/**
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* Abstract class for an event.
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*
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* @alias Blockly.Events.Abstract
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*/
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export abstract class Abstract {
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/** Whether or not the event is blank (to be populated by fromJson). */
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abstract isBlank: boolean;
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/** The workspace identifier for this event. */
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workspaceId?: string = undefined;
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group: string;
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recordUndo: boolean;
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/** Whether or not the event is a UI event. */
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isUiEvent = false;
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/** Type of this event. */
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type = '';
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/** @alias Blockly.Events.Abstract */
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constructor() {
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/**
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* The event group ID for the group this event belongs to. Groups define
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* events that should be treated as an single action from the user's
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* perspective, and should be undone together.
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*/
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this.group = eventUtils.getGroup();
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/** Sets whether the event should be added to the undo stack. */
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this.recordUndo = eventUtils.getRecordUndo();
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}
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/**
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* Encode the event as JSON.
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*
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* @returns JSON representation.
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*/
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toJson(): AbstractEventJson {
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return {
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'type': this.type,
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'group': this.group,
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};
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}
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/**
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* Decode the JSON event.
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*
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* @param json JSON representation.
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*/
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fromJson(json: AbstractEventJson) {
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this.isBlank = false;
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this.group = json['group'] || '';
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}
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/**
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* Does this event record any change of state?
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*
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* @returns True if null, false if something changed.
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*/
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isNull(): boolean {
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return false;
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}
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/**
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* Run an event.
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*
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* @param _forward True if run forward, false if run backward (undo).
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*/
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run(_forward: boolean) {}
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// Defined by subclasses.
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/**
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* Get workspace the event belongs to.
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*
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* @returns The workspace the event belongs to.
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* @throws {Error} if workspace is null.
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* @internal
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*/
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getEventWorkspace_(): Workspace {
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let workspace;
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if (this.workspaceId) {
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workspace = common.getWorkspaceById(this.workspaceId);
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}
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if (!workspace) {
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throw Error(
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'Workspace is null. Event must have been generated from real' +
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' Blockly events.');
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}
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return workspace;
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}
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}
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export interface AbstractEventJson {
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type: string;
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group: string;
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}
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