Generalize commandIconButton functionality of setting active state

ts/editor-toolbar/CommandIconButton.svelte

@@ -5,19 +5,23 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 <script lang="typescript" context="module">
     import { writable } from "svelte/store";
 
-    const commandMap = writable(new Map<string, boolean>());
+    type UpdateMap = Map<string, (event: Event) => boolean>;
+    type ActiveMap = Map<string, boolean>;
 
-    function updateButton(key: string): void {
-        commandMap.update(
-            (map: Map<string, boolean>): Map<string, boolean> =>
-                new Map([...map, [key, document.queryCommandState(key)]])
+    const updateMap = new Map() as UpdateMap;
+    const activeMap = writable(new Map() as ActiveMap);
+
+    function updateButton(key: string, event: MouseEvent): void {
+        activeMap.update(
+            (map: ActiveMap): ActiveMap =>
+                new Map([...map, [key, updateMap.get(key)(event)]])
         );
     }
 
     function updateButtons(callback: (key: string) => boolean): void {
-        commandMap.update(
-            (map: Map<string, boolean>): Map<string, boolean> => {
-                const newMap = new Map<string, boolean>();
+        activeMap.update(
+            (map: ActiveMap): ActiveMap => {
+                const newMap = new Map() as ActiveMap;
 
                 for (const key of map.keys()) {
                     newMap.set(key, callback(key));
@@ -28,8 +32,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         );
     }
 
-    export function updateActiveButtons() {
-        updateButtons((key: string): boolean => document.queryCommandState(key));
+    export function updateActiveButtons(event: Event) {
+        updateButtons((key: string): boolean => updateMap.get(key)(event));
     }
 
     export function clearActiveButtons() {
@@ -43,28 +47,34 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     export let id: string;
     export let className = "";
     export let tooltip: string;
-
     export let icon: string;
+
     export let command: string;
+    export let onClick = () => {
+        document.execCommand(command);
+    };
+
+    function onClickWrapped(event: MouseEvent): void {
+        onClick(event);
+        updateButton(command, event);
+    }
+
     export let activatable = true;
-    export let disables = true;
-    export let dropdownToggle = false;
+    export let onUpdate = (_event: Event) => document.queryCommandState(command);
+
+    updateMap.set(command, onUpdate);
 
     let active = false;
 
     if (activatable) {
-        updateButton(command);
-
-        commandMap.subscribe((map: Map<string, boolean>): (() => void) => {
+        activeMap.subscribe((map: ActiveMap): (() => void) => {
             active = Boolean(map.get(command));
             return () => map.delete(command);
         });
     }
 
-    function onClick(): void {
-        document.execCommand(command);
-        updateButton(command);
-    }
+    export let disables = true;
+    export let dropdownToggle = false;
 </script>
 
 <SquareButton
@@ -74,7 +84,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     {active}
     {disables}
     {dropdownToggle}
-    {onClick}
+    onClick={onClickWrapped}
     on:mount>
     {@html icon}
 </SquareButton>

ts/editor-toolbar/formatBlock.ts

@@ -113,7 +113,11 @@ export function getFormatBlockGroup(): DynamicSvelteComponent<typeof ButtonGroup
     const paragraphButton = commandIconButton({
         icon: paragraphIcon,
         command: "formatBlock",
+        onClick: () => {
+            document.execCommand("formatBlock", false, "p");
+        },
         tooltip: tr.editingUnorderedList(),
+        activatable: false,
     });
 
     const ulButton = commandIconButton({
@@ -139,11 +143,6 @@ export function getFormatBlockGroup(): DynamicSvelteComponent<typeof ButtonGroup
 
     return buttonGroup({
         id: "blockFormatting",
-        buttons: [
-            paragraphButton,
-            ulButton,
-            olButton,
-            listFormatting,
-        ],
+        buttons: [paragraphButton, ulButton, olButton, listFormatting],
     });
 }

ts/editor/inputHandlers.ts

@@ -51,7 +51,11 @@ export function onKey(evt: KeyboardEvent): void {
     }
 
     // prefer <br> instead of <div></div>
-    if (evt.code === "Enter" && !getListItem(currentField) && !getParagraph(currentField)) {
+    if (
+        evt.code === "Enter" &&
+        !getListItem(currentField) &&
+        !getParagraph(currentField)
+    ) {
         evt.preventDefault();
         document.execCommand("insertLineBreak");
     }