feat: use panel width event instead of ResizeObserver

app/assets/javascripts/components/AutocompleteTagInput.tsx

@@ -10,7 +10,7 @@ import { AppState } from '@/ui_models/app_state';
 type Props = {
   application: WebApplication;
   appState: AppState;
-  tagsRef: RefObject<HTMLButtonElement[]>
+  tagsRef: RefObject<HTMLButtonElement[]>;
 };
 
 export const AutocompleteTagInput: FunctionalComponent<Props> = ({
@@ -25,7 +25,7 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
   const [hintVisible, setHintVisible] = useState(true);
 
   const getActiveNoteTagResults = (query: string) => {
-    const { activeNote } = appState.notes;
+    const { activeNote } = appState.activeNote;
     return application.searchTags(query, activeNote);
   };
 
@@ -41,10 +41,13 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
     setTagResults(getActiveNoteTagResults(''));
   };
 
-  const [closeOnBlur, setLockCloseOnBlur] = useCloseOnBlur(dropdownRef, (visible: boolean) => {
-    setDropdownVisible(visible);
-    clearResults();
-  });
+  const [closeOnBlur, setLockCloseOnBlur] = useCloseOnBlur(
+    dropdownRef,
+    (visible: boolean) => {
+      setDropdownVisible(visible);
+      clearResults();
+    }
+  );
 
   const showDropdown = () => {
     const { clientHeight } = document.documentElement;
@@ -61,7 +64,7 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
 
   const onTagOptionClick = async (tag: SNTag) => {
     setLockCloseOnBlur(true);
-    await appState.notes.addTagToActiveNote(tag);
+    await appState.activeNote.addTagToActiveNote(tag);
     inputRef.current.focus();
     setTagResults(getActiveNoteTagResults(searchQuery));
     setLockCloseOnBlur(false);
@@ -69,7 +72,7 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
 
   const createAndAddNewTag = async () => {
     const newTag = await application.findOrCreateTag(searchQuery);
-    await appState.notes.addTagToActiveNote(newTag);
+    await appState.activeNote.addTagToActiveNote(newTag);
     clearResults();
     inputRef.current.focus();
   };
@@ -84,7 +87,9 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
   };
 
   useEffect(() => {
-    setHintVisible(searchQuery !== '' && !tagResults.some((tag) => tag.title === searchQuery));
+    setHintVisible(
+      searchQuery !== '' && !tagResults.some((tag) => tag.title === searchQuery)
+    );
   }, [tagResults, searchQuery]);
 
   return (
@@ -100,7 +105,12 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
           onBlur={closeOnBlur}
           onFocus={showDropdown}
           onKeyUp={(event) => {
-            if (event.key === 'Backspace' && searchQuery === '' && tagsRef.current && tagsRef.current.length > 1) {
+            if (
+              event.key === 'Backspace' &&
+              searchQuery === '' &&
+              tagsRef.current &&
+              tagsRef.current.length > 1
+            ) {
               tagsRef.current[tagsRef.current.length - 1].focus();
             }
           }}
@@ -128,7 +138,8 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
                         <span
                           key={index}
                           className={
-                            substring.toLowerCase() === searchQuery.toLowerCase()
+                            substring.toLowerCase() ===
+                            searchQuery.toLowerCase()
                               ? 'font-bold whitespace-pre-wrap'
                               : 'whitespace-pre-wrap'
                           }
@@ -151,13 +162,12 @@ export const AutocompleteTagInput: FunctionalComponent<Props> = ({
                   onClick={onTagHintClick}
                   onBlur={closeOnBlur}
                 >
-                  <span>
-                    Create new tag:
-                  </span>
-                  <span
-                    className="bg-contrast rounded text-xs color-text p-1 flex ml-2"
-                  >
-                    <Icon type="hashtag" className="sn-icon--small color-neutral mr-1" />
+                  <span>Create new tag:</span>
+                  <span className="bg-contrast rounded text-xs color-text p-1 flex ml-2">
+                    <Icon
+                      type="hashtag"
+                      className="sn-icon--small color-neutral mr-1"
+                    />
                     {searchQuery}
                   </span>
                 </button>

app/assets/javascripts/components/NoteTags.tsx

@@ -4,7 +4,7 @@ import { toDirective } from './utils';
 import { Icon } from './Icon';
 import { AutocompleteTagInput } from './AutocompleteTagInput';
 import { WebApplication } from '@/ui_models/application';
-import { useCallback, useEffect, useRef, useState } from 'preact/hooks';
+import { useEffect, useRef, useState } from 'preact/hooks';
 import { SNTag } from '@standardnotes/snjs';
 
 type Props = {
@@ -13,14 +13,14 @@ type Props = {
 };
 
 const TAGS_ROW_RIGHT_MARGIN = 92;
-const TAGS_ROW_HEIGHT = 32;
+const TAGS_ROW_HEIGHT = 36;
 const MIN_OVERFLOW_TOP = 76;
-const TAG_RIGHT_MARGIN = 8;
+const TAGS_RIGHT_MARGIN = 8;
 
 const NoteTags = observer(({ application, appState }: Props) => {
-  const { activeNoteTags } = appState.notes;
-  const [tagsContainerMaxWidth, setTagsContainerMaxWidth] =
-    useState<number | 'auto'>('auto');
+  const { tags, tagsContainerPosition, tagsContainerMaxWidth } =
+    appState.activeNote;
+
   const [overflowedTagsCount, setOverflowedTagsCount] = useState(0);
   const [overflowCountPosition, setOverflowCountPosition] = useState(0);
   const [tagsContainerCollapsed, setTagsContainerCollapsed] = useState(true);
@@ -32,23 +32,28 @@ const NoteTags = observer(({ application, appState }: Props) => {
   tagsRef.current = [];
 
   const onTagBackspacePress = async (tag: SNTag) => {
-    await appState.notes.removeTagFromActiveNote(tag);
+    await appState.activeNote.removeTagFromActiveNote(tag);
 
     if (tagsRef.current.length > 1) {
       tagsRef.current[tagsRef.current.length - 1].focus();
     }
   };
 
-  const reloadOverflowCount = useCallback(() => {
-    const editorElement = document.getElementById('editor-column');
+  const expandTags = () => {
+    setContainerHeight(tagsContainerRef.current.scrollHeight);
+    setTagsContainerCollapsed(false);
+  };
+
+  useEffect(() => {
+    appState.activeNote.reloadTagsContainerLayout();
     let overflowCount = 0;
     for (const [index, tagElement] of tagsRef.current.entries()) {
       if (tagElement.getBoundingClientRect().top >= MIN_OVERFLOW_TOP) {
         if (overflowCount === 0) {
           setOverflowCountPosition(
             tagsRef.current[index - 1].getBoundingClientRect().right -
-              (editorElement ? editorElement.getBoundingClientRect().left : 0) +
-              TAG_RIGHT_MARGIN
+              (tagsContainerPosition ?? 0) +
+              TAGS_RIGHT_MARGIN
           );
         }
         overflowCount += 1;
@@ -59,34 +64,12 @@ const NoteTags = observer(({ application, appState }: Props) => {
     if (!tagsContainerCollapsed) {
       setContainerHeight(tagsContainerRef.current.scrollHeight);
     }
-  }, [tagsContainerCollapsed]);
-
-  const expandTags = () => {
-    setContainerHeight(tagsContainerRef.current.scrollHeight);
-    setTagsContainerCollapsed(false);
-  };
-
-  useEffect(() => {
-    const editorElement = document.getElementById('editor-column');
-    const resizeObserver = new ResizeObserver((entries) => {
-      const entry = entries[0];
-      const { width } = entry.contentRect;
-      setTagsContainerMaxWidth(width);
-      reloadOverflowCount();
-    });
-
-    if (editorElement) {
-      resizeObserver.observe(editorElement);
-    }
-
-    return () => {
-      resizeObserver.disconnect();
-    };
-  }, [reloadOverflowCount]);
-
-  useEffect(() => {
-    reloadOverflowCount();
-  }, [activeNoteTags, reloadOverflowCount]);
+  }, [
+    appState.activeNote,
+    tags,
+    tagsContainerCollapsed,
+    tagsContainerPosition,
+  ]);
 
   const tagClass = `bg-contrast border-0 rounded text-xs color-text py-1 pr-2 flex items-center 
     mt-2 mr-2 cursor-pointer hover:bg-secondary-contrast focus:bg-secondary-contrast`;
@@ -99,7 +82,7 @@ const NoteTags = observer(({ application, appState }: Props) => {
     >
       <div
         ref={tagsContainerRef}
-        className={`absolute flex flex-wrap ${
+        className={`absolute flex flex-wrap pl-1 -ml-1 ${
           tagsContainerCollapsed ? 'overflow-hidden' : ''
         }`}
         style={{
@@ -108,7 +91,7 @@ const NoteTags = observer(({ application, appState }: Props) => {
           marginRight: TAGS_ROW_RIGHT_MARGIN,
         }}
       >
-        {activeNoteTags.map((tag, index) => (
+        {tags.map((tag: SNTag, index: number) => (
           <button
             className={`${tagClass} pl-1`}
             style={{ maxWidth: tagsContainerMaxWidth }}

app/assets/javascripts/directives/views/panelResizer.ts

@@ -38,6 +38,7 @@ interface PanelResizerScope {
   index: number
   minWidth: number
   onResizeFinish: () => ResizeFinishCallback
+  onWidthEvent?: () => void
   panelId: string
   property: PanelSide
 }
@@ -53,6 +54,7 @@ class PanelResizerCtrl implements PanelResizerScope {
   index!: number
   minWidth!: number
   onResizeFinish!: () => ResizeFinishCallback
+  onWidthEvent?: () => () => void
   panelId!: string
   property!: PanelSide
 
@@ -102,6 +104,7 @@ class PanelResizerCtrl implements PanelResizerScope {
 
   $onDestroy() {
     (this.onResizeFinish as any) = undefined;
+    (this.onWidthEvent as any) = undefined;
     (this.control as any) = undefined;
     window.removeEventListener(WINDOW_EVENT_RESIZE, this.handleResize);
     document.removeEventListener(MouseEventType.Move, this.onMouseMove);
@@ -246,6 +249,9 @@ class PanelResizerCtrl implements PanelResizerScope {
       this.handleLeftEvent(event);
     } else {
       this.handleWidthEvent(event);
+      if (this.onWidthEvent) {
+        this.onWidthEvent()();
+      }
     }
   }
 
@@ -387,6 +393,7 @@ export class PanelResizer extends WebDirective {
       index: '=',
       minWidth: '=',
       onResizeFinish: '&',
+      onWidthEvent: '&',
       panelId: '=',
       property: '='
     };

app/assets/javascripts/ui_models/app_state/active_note_state.ts

@@ -0,0 +1,100 @@
+import {
+  SNNote,
+  ContentType,
+  SNTag,
+} from '@standardnotes/snjs';
+import {
+  action,
+  makeObservable,
+  observable,
+} from 'mobx';
+import { WebApplication } from '../application';
+import { AppState } from './app_state';
+
+export class ActiveNoteState {
+  tags: SNTag[] = [];
+  tagsContainerPosition? = 0;
+  tagsContainerMaxWidth: number | 'auto' = 'auto';
+
+  constructor(
+    private application: WebApplication,
+    private appState: AppState,
+    appEventListeners: (() => void)[]
+  ) {
+    makeObservable(this, {
+      tags: observable,
+      tagsContainerPosition: observable,
+      tagsContainerMaxWidth: observable,
+      
+      setTagsContainerPosition: action,
+      setTagsContainerMaxWidth: action,
+      reloadTags: action,
+    });
+
+    this.tagsContainerPosition = document
+      .getElementById('editor-column')
+      ?.getBoundingClientRect().left;
+
+    appEventListeners.push(
+      application.streamItems(
+        ContentType.Tag,
+        () => {
+          this.reloadTags();
+        }
+      )
+    );
+  }
+
+  get activeNote(): SNNote | undefined {
+    return this.appState.notes.activeEditor?.note;
+  }
+
+  setTagsContainerPosition(position: number): void {
+    this.tagsContainerPosition = position;
+  }
+
+  setTagsContainerMaxWidth(width: number): void {
+    this.tagsContainerMaxWidth = width;
+  }
+
+  reloadTags(): void {
+    const { activeNote } = this;
+    if (activeNote) {
+      this.tags = this.application.getSortedTagsForNote(activeNote);
+    } 
+  }
+
+  reloadTagsContainerLayout(): void {
+    const editorElementId = 'editor-column';
+    const { clientWidth } = document.documentElement;
+    const editorPosition =
+      document.getElementById(editorElementId)?.getBoundingClientRect()
+        .left ?? 0;
+    this.appState.activeNote.setTagsContainerPosition(editorPosition);
+    this.appState.activeNote.setTagsContainerMaxWidth(
+      clientWidth - editorPosition
+    );
+  }
+
+  async addTagToActiveNote(tag: SNTag): Promise<void> {
+    const { activeNote } = this;
+    if (activeNote) {
+      await this.application.changeItem(tag.uuid, (mutator) => {
+        mutator.addItemAsRelationship(activeNote);
+      });
+      this.application.sync();
+      this.reloadTags();
+    }
+  }
+
+  async removeTagFromActiveNote(tag: SNTag): Promise<void> {
+    const { activeNote } = this;
+    if (activeNote) {
+      await this.application.changeItem(tag.uuid, (mutator) => {
+        mutator.removeItemAsRelationship(activeNote);
+      });
+      this.application.sync();
+      this.reloadTags();
+    }
+  }
+}

app/assets/javascripts/ui_models/app_state/app_state.ts

@@ -16,6 +16,7 @@ import { Bridge } from '@/services/bridge';
 import { storage, StorageKey } from '@/services/localStorage';
 import { AccountMenuState } from './account_menu_state';
 import { ActionsMenuState } from './actions_menu_state';
+import { ActiveNoteState } from './active_note_state';
 import { NoAccountWarningState } from './no_account_warning_state';
 import { SyncState } from './sync_state';
 import { SearchOptionsState } from './search_options_state';
@@ -62,6 +63,7 @@ export class AppState {
   showBetaWarning: boolean;
   readonly accountMenu = new AccountMenuState();
   readonly actionsMenu = new ActionsMenuState();
+  readonly activeNote: ActiveNoteState;
   readonly noAccountWarning: NoAccountWarningState;
   readonly sync = new SyncState();
   readonly searchOptions: SearchOptionsState;
@@ -81,8 +83,14 @@ export class AppState {
     this.$timeout = $timeout;
     this.$rootScope = $rootScope;
     this.application = application;
+    this.activeNote = new ActiveNoteState(
+      application,
+      this,
+      this.appEventObserverRemovers
+    );
     this.notes = new NotesState(
-      this.application,
+      application,
+      this,
       async () => {
         await this.notifyEvent(AppStateEvent.ActiveEditorChanged);
       },

app/assets/javascripts/ui_models/app_state/notes_state.ts

@@ -18,6 +18,7 @@ import {
 } from 'mobx';
 import { WebApplication } from '../application';
 import { Editor } from '../editor';
+import { AppState } from './app_state';
 
 export class NotesState {
   lastSelectedNote: SNNote | undefined;
@@ -29,10 +30,10 @@ export class NotesState {
   };
   contextMenuMaxHeight: number | 'auto' = 'auto';
   showProtectedWarning = false;
-  activeNoteTags: SNTag[] = [];
 
   constructor(
     private application: WebApplication,
+    private appState: AppState,
     private onActiveEditorChanged: () => Promise<void>,
     appEventListeners: (() => void)[]
   ) {
@@ -41,12 +42,10 @@ export class NotesState {
       contextMenuOpen: observable,
       contextMenuPosition: observable,
       showProtectedWarning: observable,
-      activeNoteTags: observable,
 
       selectedNotesCount: computed,
       trashedNotesCount: computed,
 
-      reloadActiveNoteTags: action,
       setContextMenuOpen: action,
       setContextMenuPosition: action,
       setContextMenuMaxHeight: action,
@@ -65,24 +64,12 @@ export class NotesState {
         });
       })
     );
-    appEventListeners.push(
-      application.streamItems(
-        ContentType.Tag,
-        () => {
-          this.reloadActiveNoteTags();
-        }
-      )
-    );
   }
 
   get activeEditor(): Editor | undefined {
     return this.application.editorGroup.editors[0];
   }
 
-  get activeNote(): SNNote | undefined {
-    return this.activeEditor?.note;
-  }
-
   get selectedNotesCount(): number {
     return Object.keys(this.selectedNotes).length;
   }
@@ -163,13 +150,6 @@ export class NotesState {
     }
   }
 
-  reloadActiveNoteTags(): void {
-    const { activeNote } = this;
-    if (activeNote) {
-      this.activeNoteTags = this.application.getSortedTagsForNote(activeNote);
-    } 
-  }
-
   private async openEditor(noteUuid: string): Promise<void> {
     if (this.activeEditor?.note?.uuid === noteUuid) {
       return;
@@ -187,7 +167,7 @@ export class NotesState {
       this.activeEditor.setNote(note);
     }
     
-    this.reloadActiveNoteTags();
+    this.appState.activeNote.reloadTags();
     await this.onActiveEditorChanged();
 
     if (note.waitingForKey) {
@@ -368,36 +348,12 @@ export class NotesState {
   isTagInSelectedNotes(tag: SNTag): boolean {
     const selectedNotes = Object.values(this.selectedNotes);
     return selectedNotes.every((note) =>
-      this.application
-        .getAppState()
+      this.appState
         .getNoteTags(note)
         .find((noteTag) => noteTag.uuid === tag.uuid)
     );
   }
 
-  async addTagToActiveNote(tag: SNTag): Promise<void> {
-    const { activeNote } = this;
-    if (activeNote) {
-      await this.application.changeItem(tag.uuid, (mutator) => {
-        mutator.addItemAsRelationship(activeNote);
-      });
-      this.application.sync();
-      this.reloadActiveNoteTags();
-    }
-  }
-
-  async removeTagFromActiveNote(tag: SNTag): Promise<void> {
-    const { activeNote } = this;
-    if (activeNote) {
-      await this.application.changeItem(tag.uuid, (mutator) => {
-        mutator.removeItemAsRelationship(activeNote);
-      });
-      this.application.sync();
-      this.reloadActiveNoteTags();
-    }
-  }
-
-
   setShowProtectedWarning(show: boolean): void {
     this.showProtectedWarning = show;
   }

app/assets/javascripts/views/notes/notes-view.pug

@@ -169,5 +169,6 @@
     default-width="300"
     hoverable="true"
     on-resize-finish="self.onPanelResize"
+    on-width-event="self.onPanelWidthEvent"
     panel-id="'notes-column'"
     )

app/assets/javascripts/views/notes/notes_view.ts

@@ -93,6 +93,7 @@ class NotesViewCtrl extends PureViewCtrl<unknown, NotesCtrlState> {
     };
     this.onWindowResize = this.onWindowResize.bind(this);
     this.onPanelResize = this.onPanelResize.bind(this);
+    this.onPanelWidthEvent = this.onPanelWidthEvent.bind(this);
     window.addEventListener('resize', this.onWindowResize, true);
     this.registerKeyboardShortcuts();
     this.autorun(async () => {
@@ -133,6 +134,7 @@ class NotesViewCtrl extends PureViewCtrl<unknown, NotesCtrlState> {
     window.removeEventListener('resize', this.onWindowResize, true);
     (this.onWindowResize as any) = undefined;
     (this.onPanelResize as any) = undefined;
+    (this.onPanelWidthEvent as any) = undefined;
     this.newNoteKeyObserver();
     this.nextNoteKeyObserver();
     this.previousNoteKeyObserver();
@@ -408,7 +410,7 @@ class NotesViewCtrl extends PureViewCtrl<unknown, NotesCtrlState> {
     await this.appState.createEditor(title);
     await this.flushUI();
     await this.reloadNotes();
-    await this.appState.notes.reloadActiveNoteTags();
+    await this.appState.activeNote.reloadTags();
   }
 
   async handleTagChange(tag: SNTag) {
@@ -643,7 +645,7 @@ class NotesViewCtrl extends PureViewCtrl<unknown, NotesCtrlState> {
 
   onPanelResize(
     newWidth: number,
-    _: number,
+    newLeft: number,
     __: boolean,
     isCollapsed: boolean
   ) {
@@ -657,6 +659,10 @@ class NotesViewCtrl extends PureViewCtrl<unknown, NotesCtrlState> {
     );
   }
 
+  onPanelWidthEvent(): void {
+    this.appState.activeNote.reloadTagsContainerLayout();
+  }
+
   paginate() {
     this.notesToDisplay += this.pageSize;
     this.reloadNotes();

app/assets/stylesheets/_sn.scss

@@ -61,6 +61,10 @@
   margin-right: 0.25rem;
 }
 
+.-ml-1 {
+  margin-left: -0.25rem;
+}
+
 .py-1 {
   padding-top: 0.25rem;
   padding-bottom: 0.25rem;