From 0d83581ab08e1a92c5c55c99965e9f054b3f43e6 Mon Sep 17 00:00:00 2001
From: Henrik Giesel <hengiesel@gmail.com>
Date: Fri, 25 Feb 2022 01:59:06 +0100
Subject: [PATCH] Fix insert media always insert at the start (on Windows)
 (#1684)

* Move Trigger into its own file

* Try implement HandlerList

* Implement new input handler and handler-list

* Use new refocus HandlerList in TextColorButton

* Fix TextColorButton on windows

* Move ColorPicker to editor-toolbar

* Change trigger behavior of overwriteSurround

* Fix mathjax-overlay flushCaret

* Insert image via bridgeCommand return value

* Fix invoking color picker with F8

* Have remove format work even when collapsed

* Satisfy formatter

* Insert media via callback resolved from python

* Replace print with web.eval

* Fix python formatting

* remove unused function (dae)
---
 qt/aqt/editor.py                              |   9 +-
 .../AppIcon.appiconset/Contents.json          | 112 +++++------
 .../mac/icon/Assets.xcassets/Contents.json    |   8 +-
 ts/editable/ContentEditable.svelte            |  16 +-
 ts/editable/content-editable.ts               | 124 +++++++-----
 ts/editor/NoteEditor.svelte                   |  10 +-
 .../editor-toolbar}/ColorPicker.svelte        |  13 +-
 .../HighlightColorButton.svelte               |   8 +-
 .../editor-toolbar/TemplateButtons.svelte     |  49 ++++-
 .../editor-toolbar/TextColorButton.svelte     |  15 +-
 .../editor-toolbar/WithColorHelper.svelte     |   3 +-
 .../mathjax-overlay/MathjaxHandle.svelte      |   4 +-
 .../plain-text-input/PlainTextInput.svelte    |   6 +-
 .../rich-text-input/RichTextInput.svelte      |  49 ++---
 ts/editor/surround.ts                         |  59 +++++-
 ts/lib/runtime-require.ts                     |   1 +
 ts/lib/typing.ts                              |   2 +
 ts/sveltelib/{mirror-dom.ts => dom-mirror.ts} |   4 +-
 ts/sveltelib/export-runtime.ts                |   2 +
 ts/sveltelib/handler-list.ts                  | 165 ++++++++++++++++
 ts/sveltelib/input-handler.ts                 | 112 +++++++++++
 ts/sveltelib/input-manager.ts                 | 176 ------------------
 22 files changed, 574 insertions(+), 373 deletions(-)
 rename ts/{components => editor/editor-toolbar}/ColorPicker.svelte (56%)
 rename ts/sveltelib/{mirror-dom.ts => dom-mirror.ts} (98%)
 create mode 100644 ts/sveltelib/handler-list.ts
 create mode 100644 ts/sveltelib/input-handler.ts
 delete mode 100644 ts/sveltelib/input-manager.ts

diff --git a/qt/aqt/editor.py b/qt/aqt/editor.py
index 493c4d8f7..1eac002a4 100644
--- a/qt/aqt/editor.py
+++ b/qt/aqt/editor.py
@@ -460,7 +460,7 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
                 self._save_current_note()
 
         elif cmd in self._links:
-            self._links[cmd](self)
+            return self._links[cmd](self)
 
         else:
             print("uncaught cmd", cmd)
@@ -703,16 +703,21 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
             filter=filter,
             key="media",
         )
+
         self.parentWindow.activateWindow()
 
     def addMedia(self, path: str, canDelete: bool = False) -> None:
         """canDelete is a legacy arg and is ignored."""
+
         try:
             html = self._addMedia(path)
         except Exception as e:
             showWarning(str(e))
             return
-        self.web.eval(f"setFormat('inserthtml', {json.dumps(html)});")
+
+        self.web.eval(
+            f'require("anki/TemplateButtons").mediaResolve({json.dumps(html)})'
+        )
 
     def _addMedia(self, path: str, canDelete: bool = False) -> str:
         """Add to media folder and return local img or sound tag."""
diff --git a/qt/bundle/mac/icon/Assets.xcassets/AppIcon.appiconset/Contents.json b/qt/bundle/mac/icon/Assets.xcassets/AppIcon.appiconset/Contents.json
index d0600b28d..6d1e95f9c 100644
--- a/qt/bundle/mac/icon/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/qt/bundle/mac/icon/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -1,59 +1,59 @@
 {
-  "images" : [
-    {
-      "idiom" : "mac",
-      "scale" : "1x",
-      "size" : "16x16"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "2x",
-      "size" : "16x16"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "1x",
-      "size" : "32x32"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "2x",
-      "size" : "32x32"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "1x",
-      "size" : "128x128"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "2x",
-      "size" : "128x128"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "1x",
-      "size" : "256x256"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "2x",
-      "size" : "256x256"
-    },
-    {
-      "filename" : "round-1024-512.png",
-      "idiom" : "mac",
-      "scale" : "1x",
-      "size" : "512x512"
-    },
-    {
-      "idiom" : "mac",
-      "scale" : "2x",
-      "size" : "512x512"
+    "images": [
+        {
+            "idiom": "mac",
+            "scale": "1x",
+            "size": "16x16"
+        },
+        {
+            "idiom": "mac",
+            "scale": "2x",
+            "size": "16x16"
+        },
+        {
+            "idiom": "mac",
+            "scale": "1x",
+            "size": "32x32"
+        },
+        {
+            "idiom": "mac",
+            "scale": "2x",
+            "size": "32x32"
+        },
+        {
+            "idiom": "mac",
+            "scale": "1x",
+            "size": "128x128"
+        },
+        {
+            "idiom": "mac",
+            "scale": "2x",
+            "size": "128x128"
+        },
+        {
+            "idiom": "mac",
+            "scale": "1x",
+            "size": "256x256"
+        },
+        {
+            "idiom": "mac",
+            "scale": "2x",
+            "size": "256x256"
+        },
+        {
+            "filename": "round-1024-512.png",
+            "idiom": "mac",
+            "scale": "1x",
+            "size": "512x512"
+        },
+        {
+            "idiom": "mac",
+            "scale": "2x",
+            "size": "512x512"
+        }
+    ],
+    "info": {
+        "author": "xcode",
+        "version": 1
     }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
 }
diff --git a/qt/bundle/mac/icon/Assets.xcassets/Contents.json b/qt/bundle/mac/icon/Assets.xcassets/Contents.json
index 73c00596a..dd65c04e8 100644
--- a/qt/bundle/mac/icon/Assets.xcassets/Contents.json
+++ b/qt/bundle/mac/icon/Assets.xcassets/Contents.json
@@ -1,6 +1,6 @@
 {
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
+    "info": {
+        "author": "xcode",
+        "version": 1
+    }
 }
diff --git a/ts/editable/ContentEditable.svelte b/ts/editable/ContentEditable.svelte
index a3bd7ba57..dd0a9bdad 100644
--- a/ts/editable/ContentEditable.svelte
+++ b/ts/editable/ContentEditable.svelte
@@ -11,10 +11,10 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     import { updateAllState } from "../components/WithState.svelte";
     import actionList from "../sveltelib/action-list";
-    import type { InputManagerAction } from "../sveltelib/input-manager";
-    import type { MirrorAction } from "../sveltelib/mirror-dom";
+    import type { MirrorAction } from "../sveltelib/dom-mirror";
+    import type { SetupInputHandlerAction } from "../sveltelib/input-handler";
     import type { ContentEditableAPI } from "./content-editable";
-    import { customFocusHandling, preventBuiltinShortcuts } from "./content-editable";
+    import { preventBuiltinShortcuts, useFocusHandler } from "./content-editable";
 
     export let resolve: (editable: HTMLElement) => void;
 
@@ -24,15 +24,15 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     const mirrorAction = actionList(mirrors);
     const mirrorOptions = { store: nodes };
 
-    export let managers: InputManagerAction[];
+    export let inputHandlers: SetupInputHandlerAction[];
 
-    const managerAction = actionList(managers);
+    const inputHandlerAction = actionList(inputHandlers);
 
     export let api: Partial<ContentEditableAPI>;
 
-    const { setupFocusHandling, flushCaret } = customFocusHandling();
+    const [focusHandler, setupFocusHandling] = useFocusHandler();
 
-    Object.assign(api, { flushCaret });
+    Object.assign(api, { focusHandler });
 </script>
 
 <anki-editable
@@ -41,7 +41,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     use:setupFocusHandling
     use:preventBuiltinShortcuts
     use:mirrorAction={mirrorOptions}
-    use:managerAction={{}}
+    use:inputHandlerAction={{}}
     on:focus
     on:blur
     on:click={updateAllState}
diff --git a/ts/editable/content-editable.ts b/ts/editable/content-editable.ts
index 803bb4f09..4dd28a279 100644
--- a/ts/editable/content-editable.ts
+++ b/ts/editable/content-editable.ts
@@ -8,55 +8,87 @@ import { bridgeCommand } from "../lib/bridgecommand";
 import { on, preventDefault } from "../lib/events";
 import { isApplePlatform } from "../lib/platform";
 import { registerShortcut } from "../lib/shortcuts";
+import type { Callback } from "../lib/typing";
+import { HandlerList } from "../sveltelib/handler-list";
 
+/**
+ * Workaround: If you try to invoke an IME after calling
+ * `placeCaretAfterContent` on a cE element, the IME will immediately
+ * end and the input character will be duplicated
+ */
 function safePlaceCaretAfterContent(editable: HTMLElement): void {
-    /**
-     * Workaround: If you try to invoke an IME after calling
-     * `placeCaretAfterContent` on a cE element, the IME will immediately
-     * end and the input character will be duplicated
-     */
     placeCaretAfterContent(editable);
     restoreSelection(editable, saveSelection(editable)!);
 }
 
-function onFocus(location: SelectionLocation | null): () => void {
-    return function (this: HTMLElement): void {
-        if (!location) {
-            safePlaceCaretAfterContent(this);
-            return;
-        }
-
-        try {
-            restoreSelection(this, location);
-        } catch {
-            safePlaceCaretAfterContent(this);
-        }
-    };
-}
-
-interface CustomFocusHandlingAPI {
-    setupFocusHandling(element: HTMLElement): { destroy(): void };
-    flushCaret(): void;
-}
-
-export function customFocusHandling(): CustomFocusHandlingAPI {
-    const focusHandlingEvents: (() => void)[] = [];
-
-    function flushEvents(): void {
-        let removeEvent: (() => void) | undefined;
-
-        while ((removeEvent = focusHandlingEvents.pop())) {
-            removeEvent();
-        }
+function restoreCaret(element: HTMLElement, location: SelectionLocation | null): void {
+    if (!location) {
+        return safePlaceCaretAfterContent(element);
     }
 
+    try {
+        restoreSelection(element, location);
+    } catch {
+        safePlaceCaretAfterContent(element);
+    }
+}
+
+type SetupFocusHandlerAction = (element: HTMLElement) => { destroy(): void };
+
+export interface FocusHandlerAPI {
+    /**
+     * Prevent the automatic caret restoration, that happens upon field focus
+     */
+    flushCaret(): void;
+    /**
+     * Executed upon focus event of editable.
+     */
+    focus: HandlerList<{ event: FocusEvent }>;
+}
+
+export function useFocusHandler(): [FocusHandlerAPI, SetupFocusHandlerAction] {
+    let latestLocation: SelectionLocation | null = null;
+    let offFocus: Callback | null;
+    let offPointerDown: Callback | null;
+    let flush = false;
+
+    function flushCaret(): void {
+        flush = true;
+    }
+
+    const focus = new HandlerList<{ event: FocusEvent }>();
+
     function prepareFocusHandling(
         editable: HTMLElement,
-        latestLocation: SelectionLocation | null = null,
+        location: SelectionLocation | null = null,
     ): void {
-        const off = on(editable, "focus", onFocus(latestLocation), { once: true });
+        latestLocation = location;
 
-        focusHandlingEvents.push(off, on(editable, "pointerdown", off, { once: true }));
+        offFocus?.();
+        offFocus = on(
+            editable,
+            "focus",
+            (event: FocusEvent): void => {
+                if (flush) {
+                    flush = false;
+                } else {
+                    restoreCaret(event.currentTarget as HTMLElement, latestLocation);
+                }
+
+                focus.dispatch({ event });
+            },
+            { once: true },
+        );
+        offPointerDown?.();
+        offPointerDown = on(
+            editable,
+            "pointerdown",
+            () => {
+                offFocus?.();
+                offFocus = null;
+            },
+            { once: true },
+        );
     }
 
     /**
@@ -66,22 +98,26 @@ export function customFocusHandling(): CustomFocusHandlingAPI {
         prepareFocusHandling(this, saveSelection(this));
     }
 
-    function setupFocusHandling(editable: HTMLElement): { destroy(): void } {
+    function setupFocusHandler(editable: HTMLElement): { destroy(): void } {
         prepareFocusHandling(editable);
         const off = on(editable, "blur", onBlur);
 
         return {
             destroy() {
-                flushEvents();
                 off();
+                offFocus?.();
+                offPointerDown?.();
             },
         };
     }
 
-    return {
-        setupFocusHandling,
-        flushCaret: flushEvents,
-    };
+    return [
+        {
+            flushCaret,
+            focus,
+        },
+        setupFocusHandler,
+    ];
 }
 
 if (isApplePlatform()) {
@@ -102,5 +138,5 @@ export interface ContentEditableAPI {
      * the ContentEditable. Can be used when you want to set the caret
      * yourself.
      */
-    flushCaret(): void;
+    focusHandler: FocusHandlerAPI;
 }
diff --git a/ts/editor/NoteEditor.svelte b/ts/editor/NoteEditor.svelte
index 19e7b1ba2..929cce275 100644
--- a/ts/editor/NoteEditor.svelte
+++ b/ts/editor/NoteEditor.svelte
@@ -326,12 +326,9 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
                         <svelte:fragment slot="editing-inputs">
                             <RichTextInput
                                 hidden={richTextsHidden[index]}
-                                on:focusin={() => {
-                                    $focusedInput = richTextInputs[index].api;
-                                }}
                                 on:focusout={() => {
-                                    $focusedInput = null;
                                     saveFieldNow();
+                                    $focusedInput = null;
                                 }}
                                 bind:this={richTextInputs[index]}
                             >
@@ -341,12 +338,9 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
                             <PlainTextInput
                                 hidden={plainTextsHidden[index]}
-                                on:focusin={() => {
-                                    $focusedInput = plainTextInputs[index].api;
-                                }}
                                 on:focusout={() => {
-                                    $focusedInput = null;
                                     saveFieldNow();
+                                    $focusedInput = null;
                                 }}
                                 bind:this={plainTextInputs[index]}
                             />
diff --git a/ts/components/ColorPicker.svelte b/ts/editor/editor-toolbar/ColorPicker.svelte
similarity index 56%
rename from ts/components/ColorPicker.svelte
rename to ts/editor/editor-toolbar/ColorPicker.svelte
index 4434589c1..0a70390b6 100644
--- a/ts/components/ColorPicker.svelte
+++ b/ts/editor/editor-toolbar/ColorPicker.svelte
@@ -3,15 +3,18 @@ Copyright: Ankitects Pty Ltd and contributors
 License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 -->
 <script lang="ts">
-    import { createEventDispatcher, onMount } from "svelte";
+    import Shortcut from "../../components/Shortcut.svelte";
+
+    export let keyCombination: string | null = null;
 
     let inputRef: HTMLInputElement;
-
-    const dispatch = createEventDispatcher();
-    onMount(() => dispatch("mount", { input: inputRef }));
 </script>
 
-<input tabindex="-1" bind:this={inputRef} type="color" on:change />
+<input bind:this={inputRef} tabindex="-1" type="color" on:input on:change />
+
+{#if keyCombination}
+    <Shortcut {keyCombination} on:action={() => inputRef.click()} />
+{/if}
 
 <style lang="scss">
     input {
diff --git a/ts/editor/editor-toolbar/HighlightColorButton.svelte b/ts/editor/editor-toolbar/HighlightColorButton.svelte
index eb09fbca9..661e96ac2 100644
--- a/ts/editor/editor-toolbar/HighlightColorButton.svelte
+++ b/ts/editor/editor-toolbar/HighlightColorButton.svelte
@@ -3,7 +3,6 @@ Copyright: Ankitects Pty Ltd and contributors
 License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 -->
 <script lang="ts">
-    import ColorPicker from "../../components/ColorPicker.svelte";
     import IconButton from "../../components/IconButton.svelte";
     import type {
         FormattingNode,
@@ -15,6 +14,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import { context as noteEditorContext } from "../NoteEditor.svelte";
     import { editingInputIsRichText } from "../rich-text-input";
     import { removeEmptyStyle, Surrounder } from "../surround";
+    import ColorPicker from "./ColorPicker.svelte";
     import type { RemoveFormat } from "./EditorToolbar.svelte";
     import { context as editorToolbarContext } from "./EditorToolbar.svelte";
     import { arrowIcon, highlightColorIcon } from "./icons";
@@ -128,11 +128,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     >
         {@html arrowIcon}
         <ColorPicker
-            on:change={(event) => {
+            on:input={(event) => {
                 color = setColor(event);
-                bridgeCommand(`lastHighlightColor:${color}`);
-                setTextColor();
+                bridgeCommand(`lastTextColor:${color}`);
             }}
+            on:change={() => setTextColor()}
         />
     </IconButton>
 </WithColorHelper>
diff --git a/ts/editor/editor-toolbar/TemplateButtons.svelte b/ts/editor/editor-toolbar/TemplateButtons.svelte
index 58a80b576..f0ed0de75 100644
--- a/ts/editor/editor-toolbar/TemplateButtons.svelte
+++ b/ts/editor/editor-toolbar/TemplateButtons.svelte
@@ -14,8 +14,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import Shortcut from "../../components/Shortcut.svelte";
     import { bridgeCommand } from "../../lib/bridgecommand";
     import * as tr from "../../lib/ftl";
+    import { promiseWithResolver } from "../../lib/promise";
+    import { registerPackage } from "../../lib/runtime-require";
     import { getPlatformString } from "../../lib/shortcuts";
     import { context } from "../NoteEditor.svelte";
+    import { setFormat } from "../old-editor-adapter";
     import { editingInputIsRichText } from "../rich-text-input";
     import ClozeButton from "./ClozeButton.svelte";
     import { micIcon, paperclipIcon } from "./icons";
@@ -23,13 +26,44 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     const { focusedInput } = context.get();
 
-    const attachmentKeyCombination = "F3";
+    const attachmentCombination = "F3";
+
+    let mediaPromise: Promise<string>;
+    let resolve: (media: string) => void;
+
+    function mediaResolve(media: string): void {
+        resolve(media);
+    }
+
+    registerPackage("anki/TemplateButtons", { mediaResolve });
+
     function onAttachment(): void {
+        if (!editingInputIsRichText($focusedInput)) {
+            return;
+        }
+
+        [mediaPromise, resolve] = promiseWithResolver<string>();
+        $focusedInput.focusHandler.focus.on(
+            async () => setFormat("inserthtml", await mediaPromise),
+            { once: true },
+        );
+
         bridgeCommand("attach");
     }
 
-    const recordKeyCombination = "F5";
+    const recordCombination = "F5";
+
     function onRecord(): void {
+        if (!editingInputIsRichText($focusedInput)) {
+            return;
+        }
+
+        [mediaPromise, resolve] = promiseWithResolver<string>();
+        $focusedInput.focusHandler.focus.on(
+            async () => setFormat("inserthtml", await mediaPromise),
+            { once: true },
+        );
+
         bridgeCommand("record");
     }
 
@@ -49,7 +83,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         <ButtonGroupItem>
             <IconButton
                 tooltip="{tr.editingAttachPicturesaudiovideo()} ({getPlatformString(
-                    attachmentKeyCombination,
+                    attachmentCombination,
                 )})"
                 iconSize={70}
                 {disabled}
@@ -57,16 +91,13 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
             >
                 {@html paperclipIcon}
             </IconButton>
-            <Shortcut
-                keyCombination={attachmentKeyCombination}
-                on:action={onAttachment}
-            />
+            <Shortcut keyCombination={attachmentCombination} on:action={onAttachment} />
         </ButtonGroupItem>
 
         <ButtonGroupItem>
             <IconButton
                 tooltip="{tr.editingRecordAudio()} ({getPlatformString(
-                    recordKeyCombination,
+                    recordCombination,
                 )})"
                 iconSize={70}
                 {disabled}
@@ -74,7 +105,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
             >
                 {@html micIcon}
             </IconButton>
-            <Shortcut keyCombination={recordKeyCombination} on:action={onRecord} />
+            <Shortcut keyCombination={recordCombination} on:action={onRecord} />
         </ButtonGroupItem>
 
         <ButtonGroupItem id="cloze">
diff --git a/ts/editor/editor-toolbar/TextColorButton.svelte b/ts/editor/editor-toolbar/TextColorButton.svelte
index 7d5bf2c48..a1f42e7e2 100644
--- a/ts/editor/editor-toolbar/TextColorButton.svelte
+++ b/ts/editor/editor-toolbar/TextColorButton.svelte
@@ -3,7 +3,6 @@ Copyright: Ankitects Pty Ltd and contributors
 License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 -->
 <script lang="ts">
-    import ColorPicker from "../../components/ColorPicker.svelte";
     import IconButton from "../../components/IconButton.svelte";
     import Shortcut from "../../components/Shortcut.svelte";
     import type {
@@ -18,6 +17,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import { context as noteEditorContext } from "../NoteEditor.svelte";
     import { editingInputIsRichText } from "../rich-text-input";
     import { removeEmptyStyle, Surrounder } from "../surround";
+    import ColorPicker from "./ColorPicker.svelte";
     import type { RemoveFormat } from "./EditorToolbar.svelte";
     import { context as editorToolbarContext } from "./EditorToolbar.svelte";
     import { arrowIcon, textColorIcon } from "./icons";
@@ -146,19 +146,12 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     >
         {@html arrowIcon}
         <ColorPicker
-            on:change={(event) => {
+            keyCombination={pickCombination}
+            on:input={(event) => {
                 color = setColor(event);
                 bridgeCommand(`lastTextColor:${color}`);
-                setTextColor();
             }}
+            on:change={() => setTextColor()}
         />
     </IconButton>
-    <Shortcut
-        keyCombination={pickCombination}
-        on:action={(event) => {
-            color = setColor(event);
-            bridgeCommand(`lastTextColor:${color}`);
-            setTextColor();
-        }}
-    />
 </WithColorHelper>
diff --git a/ts/editor/editor-toolbar/WithColorHelper.svelte b/ts/editor/editor-toolbar/WithColorHelper.svelte
index 074448fc3..01ccbf88d 100644
--- a/ts/editor/editor-toolbar/WithColorHelper.svelte
+++ b/ts/editor/editor-toolbar/WithColorHelper.svelte
@@ -8,7 +8,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     export let color: string;
 
     function setColor({ currentTarget }: Event): string {
-        return (color = (currentTarget! as HTMLInputElement).value);
+        color = (currentTarget! as HTMLInputElement).value;
+        return color;
     }
 </script>
 
diff --git a/ts/editor/mathjax-overlay/MathjaxHandle.svelte b/ts/editor/mathjax-overlay/MathjaxHandle.svelte
index ffed5611b..54c6125b6 100644
--- a/ts/editor/mathjax-overlay/MathjaxHandle.svelte
+++ b/ts/editor/mathjax-overlay/MathjaxHandle.svelte
@@ -17,7 +17,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import MathjaxMenu from "./MathjaxMenu.svelte";
 
     const { container, api } = context.get();
-    const { flushCaret, preventResubscription } = api;
+    const { focusHandler, preventResubscription } = api;
 
     const code = writable("");
 
@@ -41,7 +41,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     let selectAll = false;
 
     function placeHandle(after: boolean): void {
-        flushCaret();
+        focusHandler.flushCaret();
 
         if (after) {
             (mathjaxElement as any).placeCaretAfter();
diff --git a/ts/editor/plain-text-input/PlainTextInput.svelte b/ts/editor/plain-text-input/PlainTextInput.svelte
index 0d9fbee9d..23e9dba8f 100644
--- a/ts/editor/plain-text-input/PlainTextInput.svelte
+++ b/ts/editor/plain-text-input/PlainTextInput.svelte
@@ -26,6 +26,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import CodeMirror from "../CodeMirror.svelte";
     import { context as decoratedElementsContext } from "../DecoratedElements.svelte";
     import { context as editingAreaContext } from "../EditingArea.svelte";
+    import { context as noteEditorContext } from "../NoteEditor.svelte";
 
     export let hidden = false;
 
@@ -35,6 +36,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         ...gutterOptions,
     };
 
+    const { focusedInput } = noteEditorContext.get();
+
     const { editingInputs, content } = editingAreaContext.get();
     const decoratedElements = decoratedElementsContext.get();
     const code = writable($content);
@@ -158,8 +161,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     class="plain-text-input"
     class:light-theme={!$pageTheme.isDark}
     class:hidden
-    on:focusin
-    on:focusout
+    on:focusin={() => ($focusedInput = api)}
 >
     <CodeMirror
         {configuration}
diff --git a/ts/editor/rich-text-input/RichTextInput.svelte b/ts/editor/rich-text-input/RichTextInput.svelte
index 42e687c80..8385a4f7d 100644
--- a/ts/editor/rich-text-input/RichTextInput.svelte
+++ b/ts/editor/rich-text-input/RichTextInput.svelte
@@ -3,13 +3,12 @@ Copyright: Ankitects Pty Ltd and contributors
 License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 -->
 <script context="module" lang="ts">
+    import type { FocusHandlerAPI } from "../../editable/content-editable";
     import type { ContentEditableAPI } from "../../editable/ContentEditable.svelte";
-    import contextProperty from "../../sveltelib/context-property";
-    import type {
-        OnInputCallback,
-        OnInsertCallback,
-        Trigger,
-    } from "../../sveltelib/input-manager";
+    import useContextProperty from "../../sveltelib/context-property";
+    import useDOMMirror from "../../sveltelib/dom-mirror";
+    import type { InputHandlerAPI } from "../../sveltelib/input-handler";
+    import useInputHandler from "../../sveltelib/input-handler";
     import { pageTheme } from "../../sveltelib/theme";
     import type { EditingInputAPI } from "../EditingArea.svelte";
     import type CustomStyles from "./CustomStyles.svelte";
@@ -21,9 +20,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         moveCaretToEnd(): void;
         toggle(): boolean;
         preventResubscription(): () => void;
-        getTriggerOnNextInsert(): Trigger<OnInsertCallback>;
-        getTriggerOnInput(): Trigger<OnInputCallback>;
-        getTriggerAfterInput(): Trigger<OnInputCallback>;
+        inputHandler: InputHandlerAPI;
+        focusHandler: FocusHandlerAPI;
     }
 
     export function editingInputIsRichText(
@@ -39,19 +37,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     }
 
     const key = Symbol("richText");
-    const [context, setContextProperty] = contextProperty<RichTextInputContextAPI>(key);
+    const [context, setContextProperty] =
+        useContextProperty<RichTextInputContextAPI>(key);
+    const [globalInputHandler, setupGlobalInputHandler] = useInputHandler();
 
-    import getInputManager from "../../sveltelib/input-manager";
-    import getDOMMirror from "../../sveltelib/mirror-dom";
-
-    const {
-        manager: globalInputManager,
-        getTriggerAfterInput,
-        getTriggerOnInput,
-        getTriggerOnNextInsert,
-    } = getInputManager();
-
-    export { context, getTriggerAfterInput, getTriggerOnInput, getTriggerOnNextInsert };
+    export { context, globalInputHandler as inputHandler };
 </script>
 
 <script lang="ts">
@@ -71,11 +61,14 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import { nodeStore } from "../../sveltelib/node-store";
     import { context as decoratedElementsContext } from "../DecoratedElements.svelte";
     import { context as editingAreaContext } from "../EditingArea.svelte";
+    import { context as noteEditorContext } from "../NoteEditor.svelte";
     import RichTextStyles from "./RichTextStyles.svelte";
     import SetContext from "./SetContext.svelte";
 
     export let hidden: boolean;
 
+    const { focusedInput } = noteEditorContext.get();
+
     const { content, editingInputs } = editingAreaContext.get();
     const decoratedElements = decoratedElementsContext.get();
 
@@ -175,8 +168,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         };
     }
 
-    const { mirror, preventResubscription } = getDOMMirror();
-    const localInputManager = getInputManager();
+    const { mirror, preventResubscription } = useDOMMirror();
+    const [inputHandler, setupInputHandler] = useInputHandler();
 
     function moveCaretToEnd() {
         richTextPromise.then(placeCaretAfterContent);
@@ -205,9 +198,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         },
         moveCaretToEnd,
         preventResubscription,
-        getTriggerOnNextInsert: localInputManager.getTriggerOnNextInsert,
-        getTriggerOnInput: localInputManager.getTriggerOnInput,
-        getTriggerAfterInput: localInputManager.getTriggerAfterInput,
+        inputHandler,
     } as RichTextInputAPI;
 
     const allContexts = getAllContexts();
@@ -216,12 +207,12 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         stylesDidLoad.then(
             () =>
                 new ContentEditable({
-                    target: element.shadowRoot!,
+                    target: element.shadowRoot,
                     props: {
                         nodes,
                         resolve,
                         mirrors: [mirror],
-                        managers: [globalInputManager, localInputManager.manager],
+                        inputHandlers: [setupInputHandler, setupGlobalInputHandler],
                         api,
                     },
                     context: allContexts,
@@ -253,7 +244,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     });
 </script>
 
-<div class="rich-text-input">
+<div class="rich-text-input" on:focusin={() => ($focusedInput = api)}>
     <RichTextStyles
         color={$pageTheme.isDark ? "white" : "black"}
         let:attachToShadow={attachStyles}
diff --git a/ts/editor/surround.ts b/ts/editor/surround.ts
index 66c35da5f..e09aeffd3 100644
--- a/ts/editor/surround.ts
+++ b/ts/editor/surround.ts
@@ -9,7 +9,7 @@ import type { SurroundFormat } from "../domlib/surround";
 import { boolMatcher, reformat, surround, unsurround } from "../domlib/surround";
 import { getRange, getSelection } from "../lib/cross-browser";
 import { registerPackage } from "../lib/runtime-require";
-import type { OnInsertCallback, Trigger } from "../sveltelib/input-manager";
+import type { TriggerItem } from "../sveltelib/handler-list";
 import type { RichTextInputAPI } from "./rich-text-input";
 
 function isSurroundedInner(
@@ -63,11 +63,11 @@ export class Surrounder {
     }
 
     private api: RichTextInputAPI | null = null;
-    private trigger: Trigger<OnInsertCallback> | null = null;
+    private trigger: TriggerItem<{ event: InputEvent; text: Text }> | null = null;
 
     set richText(api: RichTextInputAPI) {
         this.api = api;
-        this.trigger = api.getTriggerOnNextInsert();
+        this.trigger = api.inputHandler.insertText.trigger({ once: true });
     }
 
     /**
@@ -76,6 +76,7 @@ export class Surrounder {
      */
     disable(): void {
         this.api = null;
+        this.trigger?.off();
         this.trigger = null;
     }
 
@@ -95,13 +96,13 @@ export class Surrounder {
         exclusive: SurroundFormat<T>[] = [],
     ): void {
         if (get(this.trigger!.active)) {
-            this.trigger!.remove();
+            this.trigger!.off();
         } else {
-            this.trigger!.add(async ({ node }: { node: Node }) => {
+            this.trigger!.on(async ({ text }) => {
                 const range = new Range();
-                range.selectNode(node);
+                range.selectNode(text);
 
-                const matches = Boolean(findClosest(node, base, matcher));
+                const matches = Boolean(findClosest(text, base, matcher));
                 const clearedRange = removeFormats(range, base, exclusive);
                 surroundAndSelect(matches, clearedRange, base, format, selection);
                 selection.collapseToEnd();
@@ -109,6 +110,41 @@ export class Surrounder {
         }
     }
 
+    private _toggleTriggerOverwrite<T>(
+        base: HTMLElement,
+        selection: Selection,
+        format: SurroundFormat<T>,
+        exclusive: SurroundFormat<T>[] = [],
+    ): void {
+        this.trigger!.on(async ({ text }) => {
+            const range = new Range();
+            range.selectNode(text);
+
+            const clearedRange = removeFormats(range, base, exclusive);
+            const surroundedRange = surround(clearedRange, base, format);
+            selection.removeAllRanges();
+            selection.addRange(surroundedRange);
+            selection.collapseToEnd();
+        });
+    }
+
+    private _toggleTriggerRemove<T>(
+        base: HTMLElement,
+        selection: Selection,
+        remove: SurroundFormat<T>[],
+        reformat: SurroundFormat<T>[] = [],
+    ): void {
+        this.trigger!.on(async ({ text }) => {
+            const range = new Range();
+            range.selectNode(text);
+
+            const clearedRange = removeFormats(range, base, remove, reformat);
+            selection.removeAllRanges();
+            selection.addRange(clearedRange);
+            selection.collapseToEnd();
+        });
+    }
+
     /**
      * Use the surround command on the current range of the RichTextInput.
      * If the range is already surrounded, it will unsurround instead.
@@ -148,14 +184,13 @@ export class Surrounder {
         const base = await this._assert_base();
         const selection = getSelection(base)!;
         const range = getRange(selection);
-        const matcher = boolMatcher(format);
 
         if (!range) {
             return;
         }
 
         if (range.collapsed) {
-            return this._toggleTrigger(base, selection, matcher, format, exclusive);
+            return this._toggleTriggerOverwrite(base, selection, format, exclusive);
         }
 
         const clearedRange = removeFormats(range, base, exclusive);
@@ -194,10 +229,14 @@ export class Surrounder {
         const selection = getSelection(base)!;
         const range = getRange(selection);
 
-        if (!range || range.collapsed) {
+        if (!range) {
             return;
         }
 
+        if (range.collapsed) {
+            return this._toggleTriggerRemove(base, selection, formats, reformats);
+        }
+
         const surroundedRange = removeFormats(range, base, formats, reformats);
         selection.removeAllRanges();
         selection.addRange(surroundedRange);
diff --git a/ts/lib/runtime-require.ts b/ts/lib/runtime-require.ts
index aa99b2776..f19589fd1 100644
--- a/ts/lib/runtime-require.ts
+++ b/ts/lib/runtime-require.ts
@@ -16,6 +16,7 @@
  */
 type AnkiPackages =
     | "anki/NoteEditor"
+    | "anki/TemplateButtons"
     | "anki/packages"
     | "anki/bridgecommand"
     | "anki/shortcuts"
diff --git a/ts/lib/typing.ts b/ts/lib/typing.ts
index 205930ff3..0c645f676 100644
--- a/ts/lib/typing.ts
+++ b/ts/lib/typing.ts
@@ -4,3 +4,5 @@
 export function assertUnreachable(x: never): never {
     throw new Error(`unreachable: ${x}`);
 }
+
+export type Callback = () => void;
diff --git a/ts/sveltelib/mirror-dom.ts b/ts/sveltelib/dom-mirror.ts
similarity index 98%
rename from ts/sveltelib/mirror-dom.ts
rename to ts/sveltelib/dom-mirror.ts
index 4ac35d361..1e4ec2a90 100644
--- a/ts/sveltelib/mirror-dom.ts
+++ b/ts/sveltelib/dom-mirror.ts
@@ -41,7 +41,7 @@ function cloneNode(node: Node): DocumentFragment {
  * While the element has focus, this connection is tethered.
  * In practice, this will sync changes from PlainTextInput to RichTextInput.
  */
-function getDOMMirror(): DOMMirrorAPI {
+function useDOMMirror(): DOMMirrorAPI {
     const allowResubscription = writable(true);
 
     function preventResubscription() {
@@ -128,4 +128,4 @@ function getDOMMirror(): DOMMirrorAPI {
     };
 }
 
-export default getDOMMirror;
+export default useDOMMirror;
diff --git a/ts/sveltelib/export-runtime.ts b/ts/sveltelib/export-runtime.ts
index 5af6c485d..7826c969f 100644
--- a/ts/sveltelib/export-runtime.ts
+++ b/ts/sveltelib/export-runtime.ts
@@ -6,7 +6,9 @@
 // would not work.
 
 import * as svelteRuntime from "svelte/internal";
+import * as svelteStore from "svelte/store";
 
 import { registerPackageRaw } from "../lib/runtime-require";
 
 registerPackageRaw("svelte/internal", svelteRuntime);
+registerPackageRaw("svelte/store", svelteStore);
diff --git a/ts/sveltelib/handler-list.ts b/ts/sveltelib/handler-list.ts
new file mode 100644
index 000000000..9b598e6d6
--- /dev/null
+++ b/ts/sveltelib/handler-list.ts
@@ -0,0 +1,165 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+import type { Readable, Writable } from "svelte/store";
+import { writable } from "svelte/store";
+
+import type { Callback } from "../lib/typing";
+
+type Handler<T> = (args: T) => Promise<void>;
+
+interface HandlerAccess<T> {
+    callback: Handler<T>;
+    clear(): void;
+}
+
+class TriggerItem<T> {
+    #active: Writable<boolean>;
+
+    constructor(
+        private setter: (handler: Handler<T>, clear: Callback) => void,
+        private clear: Callback,
+    ) {
+        this.#active = writable(false);
+    }
+
+    /**
+     * A store which indicates whether the trigger is currently turned on.
+     */
+    get active(): Readable<boolean> {
+        return this.#active;
+    }
+
+    /**
+     * Deactivate the trigger. Can be safely called multiple times.
+     */
+    off(): void {
+        this.#active.set(false);
+        this.clear();
+    }
+
+    on(handler: Handler<T>): void {
+        this.setter(handler, () => this.off());
+        this.#active.set(true);
+    }
+}
+
+interface HandlerOptions {
+    once: boolean;
+}
+
+export class HandlerList<T> {
+    #list: HandlerAccess<T>[] = [];
+
+    trigger(options?: Partial<HandlerOptions>): TriggerItem<T> {
+        const once = options?.once ?? false;
+        let handler: Handler<T> | null = null;
+
+        return new TriggerItem(
+            (callback: Handler<T>, doClear: Callback): void => {
+                const handlerAccess = {
+                    callback(args: T): Promise<void> {
+                        const result = callback(args);
+                        if (once) {
+                            doClear();
+                        }
+                        return result;
+                    },
+                    clear(): void {
+                        if (once) {
+                            doClear();
+                        }
+                    },
+                };
+
+                this.#list.push(handlerAccess);
+                handler = handlerAccess.callback;
+            },
+            () => {
+                if (handler) {
+                    this.off(handler);
+                    handler = null;
+                }
+            },
+        );
+    }
+
+    on(handler: Handler<T>, options?: Partial<HandlerOptions>): Callback {
+        const once = options?.once ?? false;
+        let offHandler: Handler<T> | null = null;
+
+        const off = (): void => {
+            if (offHandler) {
+                this.off(offHandler);
+                offHandler = null;
+            }
+        };
+
+        const handlerAccess = {
+            callback: (args: T): Promise<void> => {
+                const result = handler(args);
+                if (once) {
+                    off();
+                }
+                return result;
+            },
+            clear(): void {
+                if (once) {
+                    off();
+                }
+            },
+        };
+
+        offHandler = handlerAccess.callback;
+
+        this.#list.push(handlerAccess);
+        return off;
+    }
+
+    private off(handler: Handler<T>): void {
+        const index = this.#list.findIndex(
+            (value: HandlerAccess<T>): boolean => value.callback === handler,
+        );
+
+        if (index >= 0) {
+            this.#list.splice(index, 1);
+        }
+    }
+
+    get length(): number {
+        return this.#list.length;
+    }
+
+    dispatch(args: T): Promise<void> {
+        const promises: Promise<void>[] = [];
+
+        for (const { callback } of [...this]) {
+            promises.push(callback(args));
+        }
+
+        return Promise.all(promises) as unknown as Promise<void>;
+    }
+
+    clear(): void {
+        for (const { clear } of [...this]) {
+            clear();
+        }
+    }
+
+    [Symbol.iterator](): Iterator<HandlerAccess<T>, null, unknown> {
+        const list = this.#list;
+        let step = 0;
+
+        return {
+            next(): IteratorResult<HandlerAccess<T>, null> {
+                if (step >= list.length) {
+                    return { value: null, done: true };
+                }
+
+                return { value: list[step++], done: false };
+            },
+        };
+    }
+}
+
+export type { TriggerItem };
diff --git a/ts/sveltelib/input-handler.ts b/ts/sveltelib/input-handler.ts
new file mode 100644
index 000000000..c91bc286f
--- /dev/null
+++ b/ts/sveltelib/input-handler.ts
@@ -0,0 +1,112 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+import { getRange, getSelection } from "../lib/cross-browser";
+import { on } from "../lib/events";
+import { keyboardEventIsPrintableKey } from "../lib/keys";
+import { HandlerList } from "./handler-list";
+
+const nbsp = "\xa0";
+
+export type SetupInputHandlerAction = (element: HTMLElement) => { destroy(): void };
+
+export interface InputEventParams {
+    event: InputEvent;
+}
+export interface InsertTextParams {
+    event: InputEvent;
+    text: Text;
+}
+
+export interface InputHandlerAPI {
+    readonly beforeInput: HandlerList<InputEventParams>;
+    readonly insertText: HandlerList<InsertTextParams>;
+}
+
+/**
+ * An interface that allows Svelte components to attach event listeners via triggers.
+ * They will be attached to the component(s) that install the manager.
+ * Prevents that too many event listeners are attached and allows for some
+ * coordination between them.
+ */
+function useInputHandler(): [InputHandlerAPI, SetupInputHandlerAction] {
+    const beforeInput = new HandlerList<InputEventParams>();
+    const insertText = new HandlerList<InsertTextParams>();
+
+    async function onBeforeInput(this: Element, event: InputEvent): Promise<void> {
+        const selection = getSelection(this)!;
+        const range = getRange(selection);
+
+        await beforeInput.dispatch({ event });
+
+        if (!range || event.inputType !== "insertText" || insertText.length === 0) {
+            return;
+        }
+
+        event.preventDefault();
+
+        const content = !event.data || event.data === " " ? nbsp : event.data;
+        const text = new Text(content);
+
+        range.deleteContents();
+        range.insertNode(text);
+        range.selectNode(text);
+        range.collapse(false);
+
+        await insertText.dispatch({ event, text });
+
+        range.commonAncestorContainer.normalize();
+    }
+
+    function clearInsertText(): void {
+        insertText.clear();
+    }
+
+    function onKeydown(event: KeyboardEvent): void {
+        /* using arrow keys should cancel */
+        if (!keyboardEventIsPrintableKey(event)) {
+            clearInsertText();
+        }
+    }
+
+    function onInput(this: HTMLElement, event: InputEvent): void {
+        // prevent unwanted <div> from being left behind when clearing field contents
+        if (
+            !event.data &&
+            this.children.length === 1 &&
+            this.children.item(0) instanceof HTMLDivElement &&
+            /^\n?$/.test(this.innerText)
+        ) {
+            this.innerHTML = "";
+        }
+    }
+
+    function setupHandler(element: HTMLElement): { destroy(): void } {
+        const beforeInputOff = on(element, "beforeinput", onBeforeInput);
+        const inputOff = on(element, "input" as "beforeinput", onInput);
+
+        const blurOff = on(element, "blur", clearInsertText);
+        const pointerDownOff = on(element, "pointerdown", clearInsertText);
+        const keyDownOff = on(element, "keydown", onKeydown);
+
+        return {
+            destroy() {
+                beforeInputOff();
+                inputOff();
+                blurOff();
+                pointerDownOff();
+                keyDownOff();
+            },
+        };
+    }
+
+    return [
+        {
+            beforeInput,
+            insertText,
+        },
+        setupHandler,
+    ];
+}
+
+export default useInputHandler;
diff --git a/ts/sveltelib/input-manager.ts b/ts/sveltelib/input-manager.ts
deleted file mode 100644
index 0252e8e4d..000000000
--- a/ts/sveltelib/input-manager.ts
+++ /dev/null
@@ -1,176 +0,0 @@
-// Copyright: Ankitects Pty Ltd and contributors
-// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-
-import type { Writable } from "svelte/store";
-import { writable } from "svelte/store";
-
-import { getSelection } from "../lib/cross-browser";
-import { on } from "../lib/events";
-import { id } from "../lib/functional";
-import { keyboardEventIsPrintableKey } from "../lib/keys";
-
-export type OnInsertCallback = ({
-    node,
-    event,
-}: {
-    node: Node;
-    event: InputEvent;
-}) => Promise<void>;
-
-export type OnInputCallback = ({ event }: { event: InputEvent }) => Promise<void>;
-
-export interface Trigger<C> {
-    add(callback: C): void;
-    remove(): void;
-    active: Writable<boolean>;
-}
-
-export type Managed<C> = Pick<Trigger<C>, "remove"> & { callback: C };
-
-export type InputManagerAction = (element: HTMLElement) => { destroy(): void };
-
-interface InputManager {
-    manager: InputManagerAction;
-    getTriggerOnNextInsert(): Trigger<OnInsertCallback>;
-    getTriggerOnInput(): Trigger<OnInputCallback>;
-    getTriggerAfterInput(): Trigger<OnInputCallback>;
-}
-
-function trigger<C>(list: Managed<C>[]) {
-    return function getTrigger(): Trigger<C> {
-        const index = list.length++;
-        const active = writable(false);
-
-        function remove() {
-            delete list[index];
-            active.set(false);
-        }
-
-        function add(callback: C): void {
-            list[index] = { callback, remove };
-            active.set(true);
-        }
-
-        return {
-            add,
-            remove,
-            active,
-        };
-    };
-}
-
-const nbsp = "\xa0";
-
-/**
- * An interface that allows Svelte components to attach event listeners via triggers.
- * They will be attached to the component(s) that install the manager.
- * Prevents that too many event listeners are attached and allows for some
- * coordination between them.
- */
-function getInputManager(): InputManager {
-    const beforeInput: Managed<OnInputCallback>[] = [];
-    const beforeInsertText: Managed<OnInsertCallback>[] = [];
-
-    async function onBeforeInput(event: InputEvent): Promise<void> {
-        const selection = getSelection(event.target! as Node)!;
-        const range = selection.getRangeAt(0);
-
-        for (const { callback } of beforeInput.filter(id)) {
-            await callback({ event });
-        }
-
-        const filteredBeforeInsertText = beforeInsertText.filter(id);
-
-        if (event.inputType === "insertText" && filteredBeforeInsertText.length > 0) {
-            event.preventDefault();
-            const textContent = event.data === " " ? nbsp : event.data ?? nbsp;
-            const node = new Text(textContent);
-
-            range.deleteContents();
-            range.insertNode(node);
-            range.selectNode(node);
-            range.collapse(false);
-
-            for (const { callback, remove } of filteredBeforeInsertText) {
-                await callback({ node, event });
-                remove();
-            }
-
-            /* we call explicitly because we prevented default */
-            callAfterInputHooks(event);
-        }
-    }
-
-    const afterInput: Managed<OnInputCallback>[] = [];
-
-    async function callAfterInputHooks(event: InputEvent): Promise<void> {
-        for (const { callback } of afterInput.filter(id)) {
-            await callback({ event });
-        }
-    }
-
-    function clearInsertText(): void {
-        for (const { remove } of beforeInsertText.filter(id)) {
-            remove();
-        }
-    }
-
-    function clearInsertTextIfUnprintableKey(event: KeyboardEvent): void {
-        /* using arrow keys should cancel */
-        if (!keyboardEventIsPrintableKey(event)) {
-            clearInsertText();
-        }
-    }
-
-    function onInput(event: Event): void {
-        if (
-            !(event instanceof InputEvent) ||
-            !(event.currentTarget instanceof HTMLElement)
-        ) {
-            return;
-        }
-
-        // prevent unwanted <div> from being left behind when clearing field contents
-        if (
-            (event.data === null || event.data === "") &&
-            event.currentTarget.children.length === 1 &&
-            event.currentTarget.children.item(0) instanceof HTMLDivElement &&
-            /^\n?$/.test(event.currentTarget.innerText)
-        ) {
-            event.currentTarget.innerHTML = "";
-        }
-    }
-
-    function manager(element: HTMLElement): { destroy(): void } {
-        const removeBeforeInput = on(element, "beforeinput", onBeforeInput);
-        const removeInput = on(
-            element,
-            "input",
-            onInput as unknown as (event: Event) => void,
-        );
-
-        const removeBlur = on(element, "blur", clearInsertText);
-        const removePointerDown = on(element, "pointerdown", clearInsertText);
-        const removeKeyDown = on(element, "keydown", clearInsertTextIfUnprintableKey);
-
-        return {
-            destroy() {
-                removeInput();
-                removeBeforeInput();
-                removeBlur();
-                removePointerDown();
-                removeKeyDown();
-                removeInput();
-            },
-        };
-    }
-
-    return {
-        manager,
-        getTriggerOnNextInsert: trigger(beforeInsertText),
-        getTriggerOnInput: trigger(beforeInput),
-        getTriggerAfterInput: trigger(afterInput),
-    };
-}
-
-export default getInputManager;