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2005576036
* keep track of state for whether the block or bubble would be deleted for use with drag enter exit * Check if block and bubble is deletable in IDeleteArea * Add to jsdoc of IDeleteArea
69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
/**
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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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* @fileoverview The abstract class for a component that can delete a block or
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* bubble that is dropped on top of it.
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* @author kozbial@google.com (Monica Kozbial)
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*/
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'use strict';
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goog.provide('Blockly.DeleteArea');
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goog.require('Blockly.DragTarget');
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goog.require('Blockly.IDeleteArea');
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/**
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* Abstract class for a component that can delete a block or bubble that is
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* dropped on top of it.
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* @extends {Blockly.DragTarget}
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* @implements {Blockly.IDeleteArea}
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* @constructor
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*/
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Blockly.DeleteArea = function() {
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Blockly.DeleteArea.superClass_.constructor.call(this);
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/**
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* Whether the current block or bubble dragged over this delete area would be
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* deleted if dropped on this component.
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* @type {boolean}
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* @protected
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*/
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this.wouldDelete_ = false;
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};
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Blockly.utils.object.inherits(Blockly.DeleteArea, Blockly.DragTarget);
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/**
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* Returns whether the provided block would be deleted if dropped on this area.
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* This method should check if the block is deletable and is always called
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* before onDragEnter/onDragOver/onDragExit.
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* @param {!Blockly.BlockSvg} block The block.
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* @param {boolean} couldConnect Whether the block could could connect to
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* another.
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* @return {boolean} Whether the block provided would be deleted if dropped on
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* this area.
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*/
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Blockly.DeleteArea.prototype.wouldDeleteBlock = function(block, couldConnect) {
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var couldDeleteBlock = !block.getParent() && block.isDeletable();
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this.wouldDelete_ = couldDeleteBlock && !couldConnect;
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return this.wouldDelete_;
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};
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/**
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* Returns whether the provided bubble would be deleted if dropped on this area.
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* This method should check if the bubble is deletable and is always called
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* before onDragEnter/onDragOver/onDragExit.
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* @param {!Blockly.IBubble} bubble The bubble.
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* @return {boolean} Whether the bubble provided would be deleted if dropped on
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* this area.
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*/
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Blockly.DeleteArea.prototype.wouldDeleteBubble = function(bubble) {
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this.wouldDelete_ = bubble.isDeletable();
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return this.wouldDelete_;
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};
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