frontend/pinch-to-zoom: fix "first" for whiteboard, missing import in latex actions

Author: haraldschilly

src/packages/frontend/frame-editors/frame-tree/pinch-to-zoom.ts

@@ -43,6 +43,7 @@ document.addEventListener("gestureend", handler);
 
 export interface Data {
   fontSize: number;
+  first?: boolean;
 }
 
 const pinchMax = 1000;
@@ -70,9 +71,9 @@ export default function usePinchToZoom({
 
   const saveThrottled = useMemo(() => {
     if (disabled) return () => {};
-    return throttle((fontSize, _first) => {
+    return throttle((fontSize, first) => {
       if (onZoom != null) {
-        onZoom({ fontSize });
+        onZoom({ fontSize, first });
         return;
       }
       actions.set_font_size(id, fontSize);

src/packages/frontend/frame-editors/latex-editor/actions.ts

@@ -87,6 +87,7 @@ import {
   ScrollIntoViewRecord,
 } from "./types";
 import { ensureTargetPathIsCorrect, pdf_path } from "./util";
+import * as tree_ops from "../frame-tree/tree-ops";
 
 interface LatexEditorState extends CodeEditorState {
   build_logs: BuildLogs;
@@ -1444,7 +1445,7 @@ export class Actions extends BaseActions<LatexEditorState> {
     const tree = this._get_tree();
     const leaf_ids = tree_ops.get_leaf_ids(tree);
 
-    for (const id of leaf_ids) {
+    for (const id in leaf_ids) {
       const node = tree_ops.get_node(tree, id);
       if (node && node.get("type") === type) {
         return id;

src/packages/frontend/frame-editors/whiteboard-editor/canvas.tsx

@@ -1277,7 +1277,7 @@ export default function Canvas({
     }
 
     if (selectedTool == "pen") {
-      // mousePath is used for the actual path when creating the elemnts,
+      // mousePath is used for the actual path when creating the elements,
       // and is in data coordinates:
       const point = getMousePos(e);
       if (point == null) return;