Do not write to file or update code editor a ridiculous amount of times and update them both at the most appropriate moments.

e2e/playwright/testing-settings.spec.ts

@@ -344,14 +344,13 @@ test.describe('Testing settings', () => {
       await test.step('Refresh the application and see project setting applied', async () => {
         // Make sure we're done navigating before we reload
         await expect(settingsCloseButton).not.toBeVisible()
-        await page.reload({ waitUntil: 'domcontentloaded' })
 
+        await page.reload({ waitUntil: 'domcontentloaded' })
         await expect(logoLink).toHaveCSS('--primary-hue', projectThemeColor)
       })
 
       await test.step(`Navigate back to the home view and see user setting applied`, async () => {
         await logoLink.click()
-        await page.screenshot({ path: 'out.png' })
         await expect(logoLink).toHaveCSS('--primary-hue', userThemeColor)
       })
 

src/clientSideScene/ClientSideSceneComp.tsx

@@ -202,12 +202,20 @@ const Overlay = ({
   let xAlignment = overlay.angle < 0 ? '0%' : '-100%'
   let yAlignment = overlay.angle < -90 || overlay.angle >= 90 ? '0%' : '-100%'
 
+  // It's possible for the pathToNode to request a newer AST node
+  // than what's available in the AST at the moment of query.
+  // It eventually settles on being updated.
   const _node1 = getNodeFromPath<Node<CallExpression>>(
     kclManager.ast,
     overlay.pathToNode,
     'CallExpression'
   )
-  if (err(_node1)) return
+
+  // For that reason, to prevent console noise, we do not use err here.
+  if (_node1 instanceof Error) {
+    console.warn('ast older than pathToNode, not fatal, eventually settles', '')
+    return
+  }
   const callExpression = _node1.node
 
   const constraints = getConstraintInfo(
@@ -637,10 +645,16 @@ const ConstraintSymbol = ({
                 kclManager.ast,
                 kclManager.programMemory
               )
+
               if (!transform) return
               const { modifiedAst } = transform
-              // eslint-disable-next-line @typescript-eslint/no-floating-promises
-              kclManager.updateAst(modifiedAst, true)
+
+              await kclManager.updateAst(modifiedAst, true)
+
+              // Code editor will be updated in the modelingMachine.
+              const newCode = recast(modifiedAst)
+              if (err(newCode)) return
+              await codeManager.updateCodeEditor(newCode)
             } catch (e) {
               console.log('error', e)
             }

src/clientSideScene/sceneEntities.ts

@@ -453,6 +453,7 @@ export class SceneEntities {
         const { modifiedAst } = addStartProfileAtRes
 
         await kclManager.updateAst(modifiedAst, false)
+
         this.removeIntersectionPlane()
         this.scene.remove(draftPointGroup)
 
@@ -685,7 +686,7 @@ export class SceneEntities {
     })
     return nextAst
   }
-  setUpDraftSegment = async (
+  setupDraftSegment = async (
     sketchPathToNode: PathToNode,
     forward: [number, number, number],
     up: [number, number, number],
@@ -856,17 +857,20 @@ export class SceneEntities {
         }
 
         await kclManager.executeAstMock(modifiedAst)
+
         if (intersectsProfileStart) {
           sceneInfra.modelingSend({ type: 'CancelSketch' })
         } else {
-          await this.setUpDraftSegment(
+          await this.setupDraftSegment(
             sketchPathToNode,
             forward,
             up,
             origin,
             segmentName
           )
         }
+
+        await codeManager.updateEditorWithAstAndWriteToFile(modifiedAst)
       },
       onMove: (args) => {
         this.onDragSegment({
@@ -991,43 +995,51 @@ export class SceneEntities {
         if (trap(_node)) return
         const sketchInit = _node.node?.declarations?.[0]?.init
 
-        if (sketchInit.type === 'PipeExpression') {
-          updateRectangleSketch(sketchInit, x, y, tags[0])
+        if (sketchInit.type !== 'PipeExpression') {
+          return
+        }
 
-          let _recastAst = parse(recast(_ast))
-          if (trap(_recastAst)) return
-          _ast = _recastAst
+        updateRectangleSketch(sketchInit, x, y, tags[0])
 
-          // Update the primary AST and unequip the rectangle tool
-          await kclManager.executeAstMock(_ast)
-          sceneInfra.modelingSend({ type: 'Finish rectangle' })
+        const newCode = recast(_ast)
+        let _recastAst = parse(newCode)
+        if (trap(_recastAst)) return
+        _ast = _recastAst
 
-          const { execState } = await executeAst({
-            ast: _ast,
-            useFakeExecutor: true,
-            engineCommandManager: this.engineCommandManager,
-            programMemoryOverride,
-            idGenerator: kclManager.execState.idGenerator,
-          })
-          const programMemory = execState.memory
+        // Update the primary AST and unequip the rectangle tool
+        await kclManager.executeAstMock(_ast)
+        sceneInfra.modelingSend({ type: 'Finish rectangle' })
 
-          // Prepare to update the THREEjs scene
-          this.sceneProgramMemory = programMemory
-          const sketch = sketchFromKclValue(
-            programMemory.get(variableDeclarationName),
-            variableDeclarationName
-          )
-          if (err(sketch)) return
-          const sgPaths = sketch.paths
-          const orthoFactor = orthoScale(sceneInfra.camControls.camera)
+        // lee: I had this at the bottom of the function, but it's
+        // possible sketchFromKclValue "fails" when sketching on a face,
+        // and this couldn't wouldn't run.
+        await codeManager.updateEditorWithAstAndWriteToFile(_ast)
 
-          // Update the starting segment of the THREEjs scene
-          this.updateSegment(sketch.start, 0, 0, _ast, orthoFactor, sketch)
-          // Update the rest of the segments of the THREEjs scene
-          sgPaths.forEach((seg, index) =>
-            this.updateSegment(seg, index, 0, _ast, orthoFactor, sketch)
-          )
-        }
+        const { execState } = await executeAst({
+          ast: _ast,
+          useFakeExecutor: true,
+          engineCommandManager: this.engineCommandManager,
+          programMemoryOverride,
+          idGenerator: kclManager.execState.idGenerator,
+        })
+        const programMemory = execState.memory
+
+        // Prepare to update the THREEjs scene
+        this.sceneProgramMemory = programMemory
+        const sketch = sketchFromKclValue(
+          programMemory.get(variableDeclarationName),
+          variableDeclarationName
+        )
+        if (err(sketch)) return
+        const sgPaths = sketch.paths
+        const orthoFactor = orthoScale(sceneInfra.camControls.camera)
+
+        // Update the starting segment of the THREEjs scene
+        this.updateSegment(sketch.start, 0, 0, _ast, orthoFactor, sketch)
+        // Update the rest of the segments of the THREEjs scene
+        sgPaths.forEach((seg, index) =>
+          this.updateSegment(seg, index, 0, _ast, orthoFactor, sketch)
+        )
       },
     })
   }
@@ -1187,13 +1199,17 @@ export class SceneEntities {
           if (err(moddedResult)) return
           modded = moddedResult.modifiedAst
 
-          let _recastAst = parse(recast(modded))
+          const newCode = recast(modded)
+          if (err(newCode)) return
+          let _recastAst = parse(newCode)
           if (trap(_recastAst)) return Promise.reject(_recastAst)
           _ast = _recastAst
 
           // Update the primary AST and unequip the rectangle tool
           await kclManager.executeAstMock(_ast)
           sceneInfra.modelingSend({ type: 'Finish circle' })
+
+          await codeManager.updateEditorWithAstAndWriteToFile(_ast)
         }
       },
     })
@@ -1229,6 +1245,7 @@ export class SceneEntities {
             forward,
             position,
           })
+          await codeManager.writeToFile()
         }
       },
       onDrag: async ({

src/components/FileTree.tsx

@@ -22,6 +22,7 @@ import usePlatform from 'hooks/usePlatform'
 import { FileEntry } from 'lib/project'
 import { useFileSystemWatcher } from 'hooks/useFileSystemWatcher'
 import { normalizeLineEndings } from 'lib/codeEditor'
+import { reportRejection } from 'lib/trap'
 
 function getIndentationCSS(level: number) {
   return `calc(1rem * ${level + 1})`
@@ -189,15 +190,14 @@ const FileTreeItem = ({
   // the ReactNodes are destroyed, so is this listener :)
   useFileSystemWatcher(
     async (eventType, path) => {
-      // Don't try to read a file that was removed.
-      if (isCurrentFile && eventType !== 'unlink') {
-        // Prevents a cyclic read / write causing editor problems such as
-        // misplaced cursor positions.
-        if (codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher) {
-          codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher = false
-          return
-        }
+      // Prevents a cyclic read / write causing editor problems such as
+      // misplaced cursor positions.
+      if (codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher) {
+        codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher = false
+        return
+      }
 
+      if (isCurrentFile && eventType === 'change') {
         let code = await window.electron.readFile(path, { encoding: 'utf-8' })
         code = normalizeLineEndings(code)
         codeManager.updateCodeStateEditor(code)
@@ -242,11 +242,11 @@ const FileTreeItem = ({
       // Show the renaming form
       addCurrentItemToRenaming()
     } else if (e.code === 'Space') {
-      handleClick()
+      void handleClick().catch(reportRejection)
     }
   }
 
-  function handleClick() {
+  async function handleClick() {
     setTreeSelection(fileOrDir)
 
     if (fileOrDir.children !== null) return // Don't open directories
@@ -258,12 +258,10 @@ const FileTreeItem = ({
         `import("${fileOrDir.path.replace(project.path, '.')}")\n` +
           codeManager.code
       )
-      // eslint-disable-next-line @typescript-eslint/no-floating-promises
-      codeManager.writeToFile()
+      await codeManager.writeToFile()
 
       // Prevent seeing the model built one piece at a time when changing files
-      // eslint-disable-next-line @typescript-eslint/no-floating-promises
-      kclManager.executeCode(true)
+      await kclManager.executeCode(true)
     } else {
       // Let the lsp servers know we closed a file.
       onFileClose(currentFile?.path || null, project?.path || null)
@@ -295,7 +293,7 @@ const FileTreeItem = ({
               style={{ paddingInlineStart: getIndentationCSS(level) }}
               onClick={(e) => {
                 e.currentTarget.focus()
-                handleClick()
+                void handleClick().catch(reportRejection)
               }}
               onKeyUp={handleKeyUp}
             >
@@ -655,6 +653,13 @@ export const FileTreeInner = ({
       const isCurrentFile = loaderData.file?.path === path
       const hasChanged = eventType === 'change'
       if (isCurrentFile && hasChanged) return
+
+      // If it's a settings file we wrote to already from the app ignore it.
+      if (codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher) {
+        codeManager.writeCausedByAppCheckedInFileTreeFileSystemWatcher = false
+        return
+      }
+
       fileSend({ type: 'Refresh' })
     },
     [loaderData?.project?.path, fileContext.selectedDirectory.path].filter(

src/components/ModelingMachineProvider.tsx

@@ -304,6 +304,7 @@ export const ModelingMachineProvider = ({
             const dispatchSelection = (selection?: EditorSelection) => {
               if (!selection) return // TODO less of hack for the below please
               if (!editorManager.editorView) return
+
               setTimeout(() => {
                 if (!editorManager.editorView) return
                 editorManager.editorView.dispatch({
@@ -732,6 +733,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -768,6 +774,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -813,6 +824,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -846,6 +862,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -881,6 +902,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -917,6 +943,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -953,6 +984,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               pathToNodeMap,
               selectionRanges,
@@ -999,6 +1035,11 @@ export const ModelingMachineProvider = ({
                 sketchDetails.origin
               )
             if (err(updatedAst)) return Promise.reject(updatedAst)
+
+            await codeManager.updateEditorWithAstAndWriteToFile(
+              updatedAst.newAst
+            )
+
             const selection = updateSelections(
               { 0: pathToReplacedNode },
               selectionRanges,