From c5c0251aed87fda200cd7ee51632c8f940214163 Mon Sep 17 00:00:00 2001
From: Beka Westberg <bwestberg@google.com>
Date: Thu, 9 Nov 2023 19:36:15 +0000
Subject: [PATCH 1/2] feat: add connection highlighter interface

---
 core/interfaces/i_connection_highlighter.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 core/interfaces/i_connection_highlighter.ts

diff --git a/core/interfaces/i_connection_highlighter.ts b/core/interfaces/i_connection_highlighter.ts
new file mode 100644
index 00000000000..35fcf677663
--- /dev/null
+++ b/core/interfaces/i_connection_highlighter.ts
@@ -0,0 +1,21 @@
+/**
+ * @license
+ * Copyright 2023 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type {RenderedConnection} from '../rendered_connection';
+
+/**
+ * Visually highlights connections, usually to preview where a block will be
+ * connected if it is dropped.
+ *
+ * Often implemented by IPathObject classes.
+ */
+export interface IConnectionHighlighter {
+  /** Visually highlights the given connection. */
+  highlightConnection(conn: RenderedConnection): void;
+
+  /** Visually unhighlights the given connnection (if it was highlighted). */
+  unhighlightConnection(conn: RenderedConnection): void;
+}

From 0d0f377f2f4d1f9789975cc60f75778d2263457b Mon Sep 17 00:00:00 2001
From: Beka Westberg <bwestberg@google.com>
Date: Thu, 9 Nov 2023 19:36:38 +0000
Subject: [PATCH 2/2] fix: remove unnecessary method from the path object
 interface

---
 core/block_svg.ts                      |  9 +++++++--
 core/renderers/common/i_path_object.ts | 19 -------------------
 2 files changed, 7 insertions(+), 21 deletions(-)

diff --git a/core/block_svg.ts b/core/block_svg.ts
index 5ead73340d7..3ead87fb778 100644
--- a/core/block_svg.ts
+++ b/core/block_svg.ts
@@ -1715,7 +1715,8 @@ export class BlockSvg
    * @internal
    */
   fadeForReplacement(add: boolean) {
-    this.pathObject.updateReplacementFade(add);
+    // TODO (7204): Remove these internal methods.
+    (this.pathObject as AnyDuringMigration).updateReplacementFade(add);
   }
 
   /**
@@ -1727,6 +1728,10 @@ export class BlockSvg
    * @internal
    */
   highlightShapeForInput(conn: RenderedConnection, add: boolean) {
-    this.pathObject.updateShapeForInputHighlight(conn, add);
+    // TODO (7204): Remove these internal methods.
+    (this.pathObject as AnyDuringMigration).updateShapeForInputHighlight(
+      conn,
+      add,
+    );
   }
 }
diff --git a/core/renderers/common/i_path_object.ts b/core/renderers/common/i_path_object.ts
index 5f7189bab60..8bf57ddaa24 100644
--- a/core/renderers/common/i_path_object.ts
+++ b/core/renderers/common/i_path_object.ts
@@ -9,7 +9,6 @@
 import type {BlockStyle} from '../../theme.js';
 import type {BlockSvg} from '../../block_svg.js';
 import type {ConstantProvider} from './constants.js';
-import {RenderedConnection} from '../../rendered_connection.js';
 
 /**
  * An interface for a block's path object.
@@ -120,22 +119,4 @@ export interface IPathObject {
    * @param enable True if the block is movable, false otherwise.
    */
   updateMovable(enabled: boolean): void;
-
-  /**
-   * Add or remove styling that shows that if the dragging block is dropped,
-   * this block will be replaced.  If a shadow block, it will disappear.
-   * Otherwise it will bump.
-   *
-   * @param enable True if styling should be added.
-   */
-  updateReplacementFade(enabled: boolean): void;
-
-  /**
-   * Add or remove styling that shows that if the dragging block is dropped,
-   * this block will be connected to the input.
-   *
-   * @param conn The connection on the input to highlight.
-   * @param enable True if styling should be added.
-   */
-  updateShapeForInputHighlight(conn: RenderedConnection, enable: boolean): void;
 }