mirror of
https://github.com/google/blockly.git
synced 2026-01-08 01:20:12 +01:00
4c40378b9a
* Use goog.requireType when importing I* interfaces Interfaces have no code, so should never be referred to outside of (JSDoc) comments, and so the modules that define only interfaces never need to be goog.require'd - goog.requireType is always sufficient. This commit fixes imports of all modules whose name matches /(.*\.)?I[A-Z]*/ - i.e., the hungarian-notation named ones in core/interfaces/. * Use goog.requireType when only using import for type specifications Where a module is imported only to used in JSDoc comments it can (and should) be goog.requireType'd instead of goog.require'd. * Remove spurious eslint-disable no-unused-vars There were a few cases where modules were being imported with goog.require (because they are referred to in code, not just JSDoc comments) but were prefaced by a spurious eslint suppress. Remove these, restoring the invariant that an import gets an eslint if and only if it is a requireType. * Remove obsolete Closure Compiler error group stricterMissingRequire has been superceded by missingRequire, and now causes a Java null pointer exception if supplied.
80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
/**
|
|
* @license
|
|
* Copyright 2021 Google LLC
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @fileoverview The abstract class for a component that can delete a block or
|
|
* bubble that is dropped on top of it.
|
|
* @author kozbial@google.com (Monica Kozbial)
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
goog.module('Blockly.DeleteArea');
|
|
goog.module.declareLegacyNamespace();
|
|
|
|
const BlockSvg = goog.require('Blockly.BlockSvg');
|
|
const DragTarget = goog.require('Blockly.DragTarget');
|
|
/* eslint-disable-next-line no-unused-vars */
|
|
const IDeleteArea = goog.requireType('Blockly.IDeleteArea');
|
|
/* eslint-disable-next-line no-unused-vars */
|
|
const IDraggable = goog.requireType('Blockly.IDraggable');
|
|
const object = goog.require('Blockly.utils.object');
|
|
|
|
/**
|
|
* Abstract class for a component that can delete a block or bubble that is
|
|
* dropped on top of it.
|
|
* @extends {DragTarget}
|
|
* @implements {IDeleteArea}
|
|
* @constructor
|
|
*/
|
|
const DeleteArea = function() {
|
|
DeleteArea.superClass_.constructor.call(this);
|
|
|
|
/**
|
|
* Whether the last block or bubble dragged over this delete area would be
|
|
* deleted if dropped on this component.
|
|
* This property is not updated after the block or bubble is deleted.
|
|
* @type {boolean}
|
|
* @protected
|
|
*/
|
|
this.wouldDelete_ = false;
|
|
};
|
|
object.inherits(DeleteArea, DragTarget);
|
|
|
|
/**
|
|
* Returns whether the provided block or bubble would be deleted if dropped on
|
|
* this area.
|
|
* This method should check if the element is deletable and is always called
|
|
* before onDragEnter/onDragOver/onDragExit.
|
|
* @param {!IDraggable} element The block or bubble currently being
|
|
* dragged.
|
|
* @param {boolean} couldConnect Whether the element could could connect to
|
|
* another.
|
|
* @return {boolean} Whether the element provided would be deleted if dropped on
|
|
* this area.
|
|
*/
|
|
DeleteArea.prototype.wouldDelete = function(element, couldConnect) {
|
|
if (element instanceof BlockSvg) {
|
|
const block = /** @type {BlockSvg} */ (element);
|
|
const couldDeleteBlock = !block.getParent() && block.isDeletable();
|
|
this.updateWouldDelete_(couldDeleteBlock && !couldConnect);
|
|
} else {
|
|
this.updateWouldDelete_(element.isDeletable());
|
|
}
|
|
return this.wouldDelete_;
|
|
};
|
|
|
|
/**
|
|
* Updates the internal wouldDelete_ state.
|
|
* @param {boolean} wouldDelete The new value for the wouldDelete state.
|
|
* @protected
|
|
*/
|
|
DeleteArea.prototype.updateWouldDelete_ = function(wouldDelete) {
|
|
this.wouldDelete_ = wouldDelete;
|
|
};
|
|
|
|
exports = DeleteArea;
|