chore: rename all JS files to TS files (#6297)

core/interfaces/i_drag_target.ts

@@ -0,0 +1,88 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview The interface for a component that has a handler for when a
+ * block is dropped on top of it.
+ */
+
+'use strict';
+
+/**
+ * The interface for a component that has a handler for when a
+ * block is dropped on top of it.
+ * @namespace Blockly.IDragTarget
+ */
+goog.module('Blockly.IDragTarget');
+
+/* eslint-disable-next-line no-unused-vars */
+const {IComponent} = goog.require('Blockly.IComponent');
+/* eslint-disable-next-line no-unused-vars */
+const {IDraggable} = goog.requireType('Blockly.IDraggable');
+/* eslint-disable-next-line no-unused-vars */
+const {Rect} = goog.requireType('Blockly.utils.Rect');
+
+
+/**
+ * Interface for a component with custom behaviour when a block or bubble is
+ * dragged over or dropped on top of it.
+ * @extends {IComponent}
+ * @interface
+ * @alias Blockly.IDragTarget
+ */
+const IDragTarget = function() {};
+
+/**
+ * Returns the bounding rectangle of the drag target area in pixel units
+ * relative to viewport.
+ * @return {?Rect} The component's bounding box. Null if drag
+ *   target area should be ignored.
+ */
+IDragTarget.prototype.getClientRect;
+
+/**
+ * Handles when a cursor with a block or bubble enters this drag target.
+ * @param {!IDraggable} dragElement The block or bubble currently being
+ *   dragged.
+ */
+IDragTarget.prototype.onDragEnter;
+
+/**
+ * Handles when a cursor with a block or bubble is dragged over this drag
+ * target.
+ * @param {!IDraggable} dragElement The block or bubble currently being
+ *   dragged.
+ */
+IDragTarget.prototype.onDragOver;
+
+
+/**
+ * Handles when a cursor with a block or bubble exits this drag target.
+ * @param {!IDraggable} dragElement The block or bubble currently being
+ *   dragged.
+ */
+IDragTarget.prototype.onDragExit;
+
+/**
+ * Handles when a block or bubble is dropped on this component.
+ * Should not handle delete here.
+ * @param {!IDraggable} dragElement The block or bubble currently being
+ *   dragged.
+ */
+IDragTarget.prototype.onDrop;
+
+/**
+ * Returns whether the provided block or bubble should not be moved after being
+ * dropped on this component. If true, the element will return to where it was
+ * when the drag started.
+ * @param {!IDraggable} dragElement The block or bubble currently being
+ *   dragged.
+ * @return {boolean} Whether the block or bubble provided should be returned to
+ *     drag start.
+ */
+IDragTarget.prototype.shouldPreventMove;
+
+exports.IDragTarget = IDragTarget;