fix: Deleting in the code editor causes the instance on the canvas to be removed. (#4717)

## Description

Removed logic based on preventDefault

## Steps for reproduction

1. click button
2. expect xyz

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
0000)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env` file

apps/builder/app/builder/features/topbar/menu/menu.tsx

@@ -140,7 +140,9 @@ export const Menu = () => {
           </DropdownMenuItem>
 
           */}
-          <DropdownMenuItem onSelect={() => emitCommand("deleteInstance")}>
+          <DropdownMenuItem
+            onSelect={() => emitCommand("deleteInstanceBuilder")}
+          >
             Delete
             <DropdownMenuItemRightSlot>
               <Kbd value={["backspace"]} />

apps/builder/app/builder/shared/commands.ts

@@ -59,7 +59,6 @@ const makeBreakpointCommand = <CommandName extends string>(
 
 export const deleteSelectedInstance = () => {
   if ($isPreviewMode.get()) {
-    builderApi.toast.info("Deleting is not allowed in preview mode.");
     return;
   }
   const textEditingInstanceSelector = $textEditingInstanceSelector.get();
@@ -375,13 +374,11 @@ export const { emitCommand, subscribeCommands } = createCommandsEmitter({
     },
     */
 
-    // instances
-
     {
-      name: "deleteInstance",
+      name: "deleteInstanceBuilder",
       defaultHotkeys: ["backspace", "delete"],
-      // this disables hotkey for inputs on style panel
-      // but still work for input on canvas which call event.preventDefault() in keydown handler
+      // See "deleteInstanceCanvas" for details on why the command is separated for the canvas and builder.
+      disableHotkeyOutsideApp: true,
       disableOnInputLikeControls: true,
       handler: deleteSelectedInstance,
     },

apps/builder/app/canvas/shared/commands.ts

@@ -21,11 +21,21 @@ import {
 } from "../features/text-editor/toolbar-connector";
 import { selectInstance } from "~/shared/awareness";
 import { isDescendantOrSelf, type InstanceSelector } from "~/shared/tree-utils";
+import { deleteSelectedInstance } from "~/builder/shared/commands";
 
 export const { emitCommand, subscribeCommands } = createCommandsEmitter({
   source: "canvas",
   externalCommands: ["clickCanvas"],
   commands: [
+    {
+      name: "deleteInstanceCanvas",
+      defaultHotkeys: ["backspace", "delete"],
+      disableHotkeyOutsideApp: true,
+      // We are not disabling "Backspace" or "Delete" on the canvas. This is the main reason we have separate functions: deleteInstanceCanvas and deleteInstanceBuilder.
+      disableOnInputLikeControls: false,
+      handler: deleteSelectedInstance,
+    },
+
     {
       name: "editInstanceText",
       hidden: true,

apps/builder/app/shared/commands-emitter.ts

@@ -148,26 +148,22 @@ export const createCommandsEmitter = <CommandName extends string>({
         ) {
           continue;
         }
-        const element = event.target as HTMLElement;
-        const isOnInputLikeControl =
-          ["input", "select", "textarea"].includes(
-            element.tagName.toLowerCase()
-          ) ||
-          element.isContentEditable ||
-          // Detect Radix select, dropdown and co.
-          element.getAttribute("role") === "option";
+
         const { disableOnInputLikeControls } = commandMeta;
 
-        // in some cases hotkey override default behavior
-        // on form tags and contentEditable
-        // though still proceed when default behavior is prevented
-        // this hack makes hotkeys work on canvas instances of input etc.
-        if (
-          isOnInputLikeControl &&
-          disableOnInputLikeControls &&
-          event.defaultPrevented === false
-        ) {
-          continue;
+        if (disableOnInputLikeControls) {
+          const element = event.target as HTMLElement;
+          const isOnInputLikeControl =
+            ["input", "select", "textarea"].includes(
+              element.tagName.toLowerCase()
+            ) ||
+            element.isContentEditable ||
+            // Detect Radix select, dropdown and co.
+            element.getAttribute("role") === "option";
+
+          if (isOnInputLikeControl) {
+            continue;
+          }
         }
 
         emitted = true;