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b0a7c004a9
* fix(build): Restore erroneously-deleted filter function This was deleted in PR #7406 as it was mainly being used to filter core/ vs. test/mocha/ deps into separate deps files - but it turns out also to be used for filtering error messages too. Oops. * refactor(tests): Migrate advanced compilation test to ES Modules * refactor(build): Migrate main.js to TypeScript This turns out to be pretty straight forward, even if it would cause crashing if one actually tried to import this module instead of just feeding it to Closure Compiler. * chore(build): Remove goog.declareModuleId calls Replace goog.declareModuleId calls with a comment recording the former module ID for posterity (or at least until we decide how to reformat the renamings file. * chore(tests): Delete closure/goog/* For the moment we still need something to serve as base.js for the benefit of closure-make-deps, so we keep a vestigial base.js around, containing only the @provideGoog declaration. * refactor(build): Remove vestigial base.js By changing slightly the command line arguments to closure-make-deps and closure-calculate-chunks the need to have any base.js is eliminated. * chore: Typo fix for PR #7415
94 lines
2.6 KiB
TypeScript
94 lines
2.6 KiB
TypeScript
/**
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* @license
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* Copyright 2021 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* The abstract class for a component with custom behaviour when a
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* block or bubble is dragged over or dropped on top of it.
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*
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* @class
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*/
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// Former goog.module ID: Blockly.DragTarget
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import type {IDragTarget} from './interfaces/i_drag_target.js';
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import type {IDraggable} from './interfaces/i_draggable.js';
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import type {Rect} from './utils/rect.js';
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/**
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* Abstract class for a component with custom behaviour when a block or bubble
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* is dragged over or dropped on top of it.
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*/
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export class DragTarget implements IDragTarget {
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/**
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* The unique id for this component that is used to register with the
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* ComponentManager.
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*/
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// TODO(b/109816955): remove '!', see go/strict-prop-init-fix.
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id!: string;
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/**
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* Constructor for DragTarget. It exists to add the id property and should not
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* be called directly, only by a subclass.
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*/
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constructor() {}
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/**
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* Handles when a cursor with a block or bubble enters this drag target.
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*
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* @param _dragElement The block or bubble currently being dragged.
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*/
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onDragEnter(_dragElement: IDraggable) {}
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// no-op
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/**
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* Handles when a cursor with a block or bubble is dragged over this drag
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* target.
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*
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* @param _dragElement The block or bubble currently being dragged.
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*/
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onDragOver(_dragElement: IDraggable) {}
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// no-op
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/**
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* Handles when a cursor with a block or bubble exits this drag target.
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*
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* @param _dragElement The block or bubble currently being dragged.
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*/
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onDragExit(_dragElement: IDraggable) {}
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// no-op
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/**
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* Handles when a block or bubble is dropped on this component.
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* Should not handle delete here.
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*
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* @param _dragElement The block or bubble currently being dragged.
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*/
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onDrop(_dragElement: IDraggable) {}
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// no-op
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/**
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* Returns the bounding rectangle of the drag target area in pixel units
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* relative to the Blockly injection div.
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*
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* @returns The component's bounding box. Null if drag target area should be
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* ignored.
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*/
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getClientRect(): Rect | null {
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return null;
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}
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/**
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* Returns whether the provided block or bubble should not be moved after
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* being dropped on this component. If true, the element will return to where
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* it was when the drag started.
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*
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* @param _dragElement The block or bubble currently being dragged.
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* @returns Whether the block or bubble provided should be returned to drag
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* start.
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*/
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shouldPreventMove(_dragElement: IDraggable): boolean {
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return false;
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}
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}
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