feat: profile support

package.json

@@ -53,6 +53,7 @@
     "@tauri-apps/api": "^1.6.0",
     "@tauri-apps/cli": "^1.6.0",
     "@types/dom-view-transitions": "^1.0.6",
+    "@types/semver": "^7.7.0",
     "@types/w3c-web-serial": "^1.0.8",
     "@types/w3c-web-usb": "^1.0.10",
     "@types/wicg-file-system-access": "^2023.10.5",

pnpm-lock.yaml

@@ -65,6 +65,9 @@ importers:
       '@types/dom-view-transitions':
         specifier: ^1.0.6
         version: 1.0.6
+      '@types/semver':
+        specifier: ^7.7.0
+        version: 7.7.0
       '@types/w3c-web-serial':
         specifier: ^1.0.8
         version: 1.0.8
@@ -1488,6 +1491,9 @@ packages:
   '@types/retry@0.12.0':
     resolution: {integrity: sha512-wWKOClTTiizcZhXnPY4wikVAwmdYHp8q6DmC+EJUzAMsycb7HB32Kh9RN4+0gExjmPmZSAQjgURXIGATPegAvA==}
 
+  '@types/semver@7.7.0':
+    resolution: {integrity: sha512-k107IF4+Xr7UHjwDc7Cfd6PRQfbdkiRabXGRjo07b4WyPahFBZCZ1sE+BNxYIJPPg73UkfOsVOLwqVc/6ETrIA==}
+
   '@types/sinonjs__fake-timers@8.1.1':
     resolution: {integrity: sha512-0kSuKjAS0TrGLJ0M/+8MaFkGsQhZpB6pxOmvS3K8FYI72K//YmdfoW9X2qPsAKh1mkwxGD5zib9s1FIFed6E8g==}
 
@@ -5669,6 +5675,8 @@ snapshots:
 
   '@types/retry@0.12.0': {}
 
+  '@types/semver@7.7.0': {}
+
   '@types/sinonjs__fake-timers@8.1.1': {}
 
   '@types/sizzle@2.3.8': {}

src/i18n/de/index.ts

@@ -21,7 +21,7 @@ const de = {
     AUTO_BACKUP: "Auto-backup",
     DISCLAIMER:
       "Das Backup in diesem Browser gespeichert und bleibt nur auf diesem Computer.",
-    DOWNLOAD: "Alles",
+    DOWNLOAD: "Komplettes Profil",
     RESTORE: "Wiederherstellen",
   },
   modal: {

src/i18n/en/index.ts

@@ -17,7 +17,7 @@ const en = {
     AUTO_BACKUP: "Auto-backup",
     DISCLAIMER:
       "Whenever you connect this device to browser, a backup is made locally and kept only on your computer.",
-    DOWNLOAD: "Everything",
+    DOWNLOAD: "Full profile",
     RESTORE: "Restore",
   },
   sync: {

src/lib/backup/backup.ts

@@ -14,7 +14,7 @@ import {
   settings,
 } from "$lib/undo-redo.js";
 import { get } from "svelte/store";
-import { serialPort } from "../serial/connection";
+import { activeProfile, serialPort } from "../serial/connection";
 import { csvLayoutToJson, isCsvLayout } from "$lib/backup/compat/legacy-layout";
 import { isCsvChords, csvChordsToJson } from "./compat/legacy-chords";
 
@@ -50,11 +50,9 @@ export function createLayoutBackup(): CharaLayoutFile {
     charaVersion: 1,
     type: "layout",
     device: get(serialPort)?.device,
-    layout: get(layout).map((it) => it.map((it) => it.action)) as [
+    layout: (get(layout)[get(activeProfile)]?.map((it) =>
-      number[],
+      it.map((it) => it.action),
-      number[],
+    ) ?? []) as [number[], number[], number[]],
-      number[],
-    ],
   };
 }
 
@@ -70,7 +68,7 @@ export function createSettingsBackup(): CharaSettingsFile {
   return {
     charaVersion: 1,
     type: "settings",
-    settings: get(settings).map((it) => it.value),
+    settings: get(settings)[get(activeProfile)]?.map((it) => it.value) ?? [],
   };
 }
 
@@ -97,9 +95,11 @@ export function restoreFromFile(
       const recent = file.history[0];
       if (!recent) return;
       let backupDevice = recent[1].device;
-      if (backupDevice === "TWO") backupDevice = "ONE";
+      if (backupDevice === "TWO" || backupDevice === "M4G")
+        backupDevice = "ONE";
       let currentDevice = get(serialPort)?.device;
-      if (currentDevice === "TWO") currentDevice = "ONE";
+      if (currentDevice === "TWO" || backupDevice === "M4G")
+        currentDevice = "ONE";
 
       if (backupDevice !== currentDevice) {
         alert("Backup is incompatible with this device");
@@ -167,12 +167,13 @@ export function getChangesFromChordFile(file: CharaChordFile) {
 export function getChangesFromSettingsFile(file: CharaSettingsFile) {
   const changes: Change[] = [];
   for (const [id, value] of file.settings.entries()) {
-    const setting = get(settings)[id];
+    const setting = get(settings)[get(activeProfile)]?.[id];
     if (setting !== undefined && setting.value !== value) {
       changes.push({
         type: ChangeType.Setting,
         id,
         setting: value,
+        profile: get(activeProfile),
       });
     }
   }
@@ -183,12 +184,13 @@ export function getChangesFromLayoutFile(file: CharaLayoutFile) {
   const changes: Change[] = [];
   for (const [layer, keys] of file.layout.entries()) {
     for (const [id, action] of keys.entries()) {
-      if (get(layout)[layer]?.[id]?.action !== action) {
+      if (get(layout)[get(activeProfile)]?.[layer]?.[id]?.action !== action) {
         changes.push({
           type: ChangeType.Layout,
           layer,
           id,
           action,
+          profile: get(activeProfile),
         });
       }
     }

src/lib/components/layout/GenericLayout.svelte

@@ -8,17 +8,16 @@
   import { dev } from "$app/environment";
   import ActionSelector from "$lib/components/layout/ActionSelector.svelte";
   import { get } from "svelte/store";
-  import type { Writable } from "svelte/store";
   import KeyboardKey from "$lib/components/layout/KeyboardKey.svelte";
   import { getContext, mount, unmount } from "svelte";
   import type { VisualLayoutConfig } from "./visual-layout.js";
   import { changes, ChangeType, layout } from "$lib/undo-redo";
   import { fly } from "svelte/transition";
   import { expoOut } from "svelte/easing";
+  import { activeLayer, activeProfile } from "$lib/serial/connection";
 
   const { scale, margin, strokeWidth, fontSize, iconFontSize } =
     getContext<VisualLayoutConfig>("visual-layout-config");
-  const activeLayer = getContext<Writable<number>>("active-layer");
 
   if (dev) {
     // you have absolutely no idea what a difference this makes for performance
@@ -125,8 +124,10 @@
     const keyInfo = layoutInfo.keys[index];
     if (!keyInfo) return;
     const clickedGroup = groupParent.children.item(index) as SVGGElement;
-    const nextAction = get(layout)[get(activeLayer)]?.[keyInfo.id];
+    const nextAction =
-    const currentAction = get(deviceLayout)[get(activeLayer)]?.[keyInfo.id];
+      get(layout)[get(activeProfile)][get(activeLayer)]?.[keyInfo.id];
+    const currentAction =
+      get(deviceLayout)[get(activeProfile)][get(activeLayer)]?.[keyInfo.id];
     const component = mount(ActionSelector, {
       target: document.body,
       props: {

src/lib/components/layout/KeyText.svelte

@@ -1,5 +1,4 @@
 <script lang="ts">
-  import { getContext } from "svelte";
   import type { Writable } from "svelte/store";
   import type { VisualLayoutConfig } from "$lib/components/layout/visual-layout";
   import type { CompiledLayoutKey } from "$lib/serialization/visual-layout";
@@ -7,10 +6,11 @@
   import { osLayout } from "$lib/os-layout.js";
   import { KEYMAP_CODES } from "$lib/serial/keymap-codes";
   import { action } from "$lib/title";
+  import { activeProfile, activeLayer } from "$lib/serial/connection";
+  import { getContext } from "svelte";
 
   const { fontSize, margin, inactiveOpacity, inactiveScale, iconFontSize } =
     getContext<VisualLayoutConfig>("visual-layout-config");
-  const activeLayer = getContext<Writable<number>>("active-layer");
   const currentAction = getContext<Writable<Set<number>> | undefined>(
     "highlight-action",
   );
@@ -33,7 +33,9 @@
 </script>
 
 {#each positions as position, layer}
-  {@const { action: actionId, isApplied } = $layout[layer]?.[key.id] ?? {
+  {@const { action: actionId, isApplied } = $layout[$activeProfile]?.[layer]?.[
+    key.id
+  ] ?? {
     action: 0,
     isApplied: true,
   }}

src/lib/components/layout/Layout.svelte

@@ -2,21 +2,11 @@
   import { deviceMeta, serialPort } from "$lib/serial/connection";
   import { action } from "$lib/title";
   import GenericLayout from "$lib/components/layout/GenericLayout.svelte";
-  import { getContext } from "svelte";
+  import { activeProfile, activeLayer } from "$lib/serial/connection";
-  import type { Writable } from "svelte/store";
   import type { VisualLayout } from "$lib/serialization/visual-layout";
   import { fade, fly } from "svelte/transition";
   import { restoreFromFile } from "$lib/backup/backup";
 
-  let device = $derived($serialPort?.device);
-  const activeLayer = getContext<Writable<number>>("active-layer");
-
-  const layers = [
-    ["Numeric Layer", "123", 1],
-    ["Primary Layer", "abc", 0],
-    ["Function Layer", "function", 2],
-  ] as const;
-
   const layouts = {
     ONE: () =>
       import("$lib/assets/layouts/one.yml").then(
@@ -46,19 +36,25 @@
 </script>
 
 <div class="container">
-  {#if device}
+  {#if $serialPort}
-    {#await layouts[device]() then visualLayout}
+    {#await layouts[$serialPort.device]() then visualLayout}
       <fieldset transition:fade>
-        {#each layers as [title, icon, value]}
+        <div class="layers">
-          <button
+          {#each Array.from({ length: $serialPort.layerCount }, (_, i) => i) as layer}
-            class="icon"
+            <label>
-            use:action={{ title, shortcut: `alt+${value + 1}` }}
+              <input
-            onclick={() => ($activeLayer = value)}
+                type="radio"
-            class:active={$activeLayer === value}
+                onclick={() => ($activeLayer = layer)}
-          >
+                name="layer"
-            {icon}
+                value={layer}
-          </button>
+                checked={$activeLayer === layer}
+              />
+              {String.fromCodePoint(
+                "A".codePointAt(0)! + $activeProfile,
+              )}{layer + 1}
+            </label>
           {/each}
+        </div>
         {#if $deviceMeta?.factoryDefaults?.layout}
           <button
             use:action={{ title: "Reset Layout" }}
@@ -100,60 +96,13 @@
     border: none;
   }
 
-  button.icon {
+  .layers {
-    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
 
-    z-index: 1;
+    margin-inline: auto;
 
-    font-size: 24px;
+    gap: 2px;
-    color: var(--md-sys-color-on-surface-variant);
-
-    background: var(--md-sys-color-surface-variant);
-    border: none;
-
-    transition: all 250ms ease;
-
-    &:nth-child(2) {
-      z-index: 2;
-
-      aspect-ratio: 1;
-
-      font-size: 32px;
-
-      border-radius: 50%;
-    }
-
-    &:first-child,
-    &:nth-child(3) {
-      aspect-ratio: unset;
-      height: unset;
-    }
-
-    &:first-child {
-      margin-inline-end: -8px;
-      padding-inline: 4px 24px;
-      border-radius: 16px 0 0 16px;
-    }
-
-    &:nth-child(3) {
-      margin-inline-start: -8px;
-      padding-inline: 24px 4px;
-      border-radius: 0 16px 16px 0;
-    }
-
-    &.reset-layout {
-      position: absolute;
-      top: 50%;
-      right: 0;
-      transform: translate(100%, -50%);
-      background: none;
-      font-size: 24px;
-    }
-
-    &.active {
-      font-weight: 900;
-      color: var(--md-sys-color-on-tertiary);
-      background: var(--md-sys-color-tertiary);
-    }
   }
 </style>

src/lib/serial/connection.ts

@@ -29,21 +29,24 @@ export const deviceChords = persistentWritable<Chord[]>(
 /**
  * Layout as read from the device
  */
-export const deviceLayout = persistentWritable<CharaLayout>(
+export const deviceLayout = persistentWritable<CharaLayout[]>(
-  "layout",
+  "layout-profiles",
-  [[], [], []],
+  [],
   () => get(userPreferences).backup,
 );
 
 /**
  * Settings as read from the device
  */
-export const deviceSettings = persistentWritable<number[]>(
+export const deviceSettings = persistentWritable<number[][]>(
-  "device-settings",
+  "settings-profiles",
   [],
   () => get(userPreferences).backup,
 );
 
+export const activeProfile = persistentWritable<number>("active-profile", 0);
+export const activeLayer = persistentWritable<number>("active-profile", 0);
+
 export const syncStatus: Writable<
   "done" | "error" | "downloading" | "uploading"
 > = writable("done");
@@ -80,32 +83,51 @@ export async function sync() {
     .map((it) => it.items.length)
     .reduce((a, b) => a + b, 0);
 
-  const max = maxSettings + device.keyCount * 3 + chordCount;
+  const max =
+    (maxSettings + device.keyCount * device.layerCount) * device.profileCount +
+    chordCount;
   let current = 0;
+  activeProfile.update((it) => Math.min(it, device.profileCount - 1));
+  activeLayer.update((it) => Math.min(it, device.layerCount - 1));
   syncProgress.set({ max, current });
   function progressTick() {
     current++;
     syncProgress.set({ max, current });
   }
 
-  const parsedSettings: number[] = [];
+  const parsedSettings: number[][] = Array.from(
+    { length: device.profileCount },
+    () => [],
+  );
+  for (const [profile, settings] of parsedSettings.entries()) {
     for (const category of meta.settings) {
       for (const setting of category.items) {
         try {
-        parsedSettings[setting.id] = await device.getSetting(setting.id);
+          settings[setting.id] = await device.getSetting(profile, setting.id);
         } catch {}
       }
       progressTick();
     }
+  }
   deviceSettings.set(parsedSettings);
 
-  const parsedLayout: CharaLayout = [[], [], []];
+  const parsedLayout: CharaLayout[] = Array.from(
-  for (let layer = 1; layer <= 3; layer++) {
+    { length: device.profileCount },
-    for (let i = 0; i < device.keyCount; i++) {
+    () =>
-      parsedLayout[layer - 1]![i] = await device.getLayoutKey(layer, i);
+      Array.from({ length: device.layerCount }, () =>
+        Array.from({ length: device.keyCount }, () => 0),
+      ),
+  );
+  for (const [profile, layout] of parsedLayout.entries()) {
+    for (const [layer, keys] of layout.entries()) {
+      for (let i = 0; i < keys.length; i++) {
+        try {
+          keys[i] = await device.getLayoutKey(profile, layer + 1, i);
+        } catch {}
         progressTick();
       }
     }
+  }
   deviceLayout.set(parsedLayout);
 
   const chordInfo = [];

src/lib/serial/device.ts

@@ -1,7 +1,6 @@
 import { LineBreakTransformer } from "$lib/serial/line-break-transformer";
 import { serialLog } from "$lib/serial/connection";
 import type { Chord } from "$lib/serial/chord";
-import { SemVer } from "$lib/serial/sem-ver";
 import {
   parseChordActions,
   parsePhrase,
@@ -10,6 +9,7 @@ import {
 } from "$lib/serial/chord";
 import { browser } from "$app/environment";
 import { showConnectionFailedDialog } from "$lib/dialogs/connection-failed-dialog";
+import semverGte from "semver/functions/gte";
 
 const PORT_FILTERS: Map<string, SerialPortFilter> = new Map([
   ["ONE M0", { usbProductId: 32783, usbVendorId: 9114 }],
@@ -100,11 +100,13 @@ export class CharaDevice {
   private readonly suspendDebounce = 100;
   private suspendDebounceId?: number;
 
-  version!: SemVer;
+  version!: string;
   company!: "CHARACHORDER" | "FORGE";
   device!: "ONE" | "TWO" | "LITE" | "X" | "M4G";
   chipset!: "M0" | "S2" | "S3";
   keyCount!: 90 | 67 | 256;
+  layerCount = 3;
+  profileCount = 1;
 
   get portInfo() {
     return this.port.getInfo();
@@ -135,9 +137,13 @@ export class CharaDevice {
       });
       await this.port.close();
 
-      this.version = new SemVer(
+      this.version = await this.send(1, ["VERSION"]).then(
-        await this.send(1, ["VERSION"]).then(([version]) => version),
+        ([version]) => version,
       );
+      // TODO: beta.3
+      if (semverGte(this.version, "2.2.0-beta.3")) {
+        this.profileCount = 3;
+      }
       const [company, device, chipset] = await this.send(3, ["ID"]);
       this.company = company as typeof this.company;
       this.device = device as typeof this.device;
@@ -369,11 +375,16 @@ export class CharaDevice {
    * @param id id of the key, refer to the individual device for where each key is
    * @param action the assigned action id
    */
-  async setLayoutKey(layer: number, id: number, action: number) {
+  async setLayoutKey(
+    profile: number,
+    layer: number,
+    id: number,
+    action: number,
+  ) {
     const [status] = await this.send(1, [
       "VAR",
       "B4",
-      `A${layer}`,
+      `${String.fromCodePoint("A".codePointAt(0)! + profile)}${layer}`,
       id.toString(),
       action.toString(),
     ]);
@@ -386,11 +397,11 @@ export class CharaDevice {
    * @param id id of the key, refer to the individual device for where each key is
    * @returns the assigned action id
    */
-  async getLayoutKey(layer: number, id: number) {
+  async getLayoutKey(profile: number, layer: number, id: number) {
     const [position, status] = await this.send(2, [
       "VAR",
       "B3",
-      `A${layer}`,
+      `${String.fromCodePoint("A".codePointAt(0)! + profile)}${layer}`,
       id.toString(),
     ]);
     if (status !== "0") throw new Error(`Failed with status ${status}`);
@@ -415,11 +426,11 @@ export class CharaDevice {
    * Settings are applied until the next reboot or loss of power.
    * To permanently store the settings, you *must* call commit.
    */
-  async setSetting(id: number, value: number) {
+  async setSetting(profile: number, id: number, value: number) {
     const [status] = await this.send(1, [
       "VAR",
       "B2",
-      id.toString(16).toUpperCase(),
+      (id + profile * 0x100).toString(16).toUpperCase(),
       value.toString(),
     ]);
     if (status !== "0") throw new Error(`Failed with status ${status}`);
@@ -428,11 +439,11 @@ export class CharaDevice {
   /**
    * Retrieves a setting from the device
    */
-  async getSetting(id: number): Promise<number> {
+  async getSetting(profile: number, id: number): Promise<number> {
     const [value, status] = await this.send(2, [
       "VAR",
       "B1",
-      id.toString(16).toUpperCase(),
+      (id + profile * 0x100).toString(16).toUpperCase(),
     ]);
     if (status !== "0")
       throw new Error(

src/lib/serial/sem-ver.ts

@@ -1,32 +0,0 @@
-export class SemVer {
-  major = 0;
-  minor = 0;
-  patch = 0;
-  preRelease?: string;
-  meta?: string;
-
-  constructor(versionString: string) {
-    const result =
-      /^([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+([0-9A-Za-z-]+))?$/.exec(
-        versionString,
-      );
-    if (!result) {
-      console.error("Invalid version string:", versionString);
-    } else {
-      const [, major, minor, patch, preRelease, meta] = result;
-      this.major = Number.parseInt(major ?? "NaN");
-      this.minor = Number.parseInt(minor ?? "NaN");
-      this.patch = Number.parseInt(patch ?? "NaN");
-      if (preRelease) this.preRelease = preRelease;
-      if (meta) this.meta = meta;
-    }
-  }
-
-  toString() {
-    return (
-      `${this.major}.${this.minor}.${this.patch}` +
-      (this.preRelease ? `-${this.preRelease}` : "") +
-      (this.meta ? `+${this.meta}` : "")
-    );
-  }
-}

src/lib/serialization/layout.ts

@@ -4,13 +4,10 @@ import { fromBase64, toBase64 } from "$lib/serialization/base64";
 export interface NewCharaLayout {
   charaLayoutVersion: 1;
   device: "one" | "lite" | string;
-  /**
+  layers: number[][];
-   * Layers A1-A3, with numeric action codes on each
-   */
-  layers: [number[], number[], number[]];
 }
 
-export type CharaLayout = [number[], number[], number[]];
+export type CharaLayout = number[][];
 
 /**
  * Serialize a layout into a micro package

src/lib/setting.ts

@@ -1,5 +1,8 @@
 import type { Action } from "svelte/action";
 import { changes, ChangeType, settings } from "$lib/undo-redo";
+import { activeProfile } from "./serial/connection";
+import { combineLatest, map } from "rxjs";
+import { fromReadable } from "./util/from-readable";
 
 /**
  * https://gist.github.com/mjackson/5311256
@@ -103,7 +106,12 @@ export const setting: Action<
     ? Number(node.getAttribute("max"))
     : undefined;
 
-  const unsubscribe = settings.subscribe(async (settings) => {
+  const subscription = combineLatest([
+    fromReadable(settings),
+    fromReadable(activeProfile),
+  ])
+    .pipe(map(([settings, profile]) => settings[profile]!))
+    .subscribe(async (settings) => {
       if (id in settings) {
         const { value, isApplied } = settings[id]!;
         if (isNumeric) {
@@ -186,7 +194,7 @@ export const setting: Action<
   return {
     destroy() {
       node.removeEventListener("change", listener);
-      unsubscribe();
+      subscription.unsubscribe();
     },
   };
 };

src/lib/style/form/_radio.scss

@@ -0,0 +1,36 @@
+label:has(input[type="radio"]) {
+  cursor: pointer;
+
+  z-index: 1;
+
+  aspect-ratio: unset;
+  height: 1.5em;
+  padding-inline: 12px;
+  border: none;
+  border-radius: 0;
+
+  font-size: 16px;
+  color: var(--md-sys-color-on-surface-variant);
+
+  background: var(--md-sys-color-surface-variant);
+
+  transition: all 250ms ease;
+
+  > input[type="radio"] {
+    display: none;
+  }
+
+  &:first-child {
+    border-radius: 16px 0 0 16px;
+  }
+
+  &:last-child {
+    border-radius: 0 16px 16px 0;
+  }
+
+  &:has(:checked) {
+    font-weight: 900;
+    color: var(--md-sys-color-on-tertiary);
+    background: var(--md-sys-color-tertiary);
+  }
+}

src/lib/style/theme.scss

@@ -2,6 +2,7 @@
 
 @use "form/button";
 @use "form/toggle";
+@use "form/radio";
 
 @use "kbd";
 @use "print";

src/lib/undo-redo.ts

@@ -19,6 +19,7 @@ export interface LayoutChange {
   id: number;
   layer: number;
   action: number;
+  profile?: number;
 }
 
 export interface ChordChange {
@@ -33,6 +34,7 @@ export interface SettingChange {
   type: ChangeType.Setting;
   id: number;
   setting: number;
+  profile?: number;
 }
 
 export interface ChangeInfo {
@@ -45,23 +47,29 @@ export type Change = LayoutChange | ChordChange | SettingChange;
 export const changes = persistentWritable<Change[][]>("changes", []);
 
 export interface Overlay {
-  layout: [Map<number, number>, Map<number, number>, Map<number, number>];
+  layout: Array<Array<Map<number, number> | undefined> | undefined>;
   chords: Map<string, Chord & { deleted: boolean }>;
-  settings: Map<number, number>;
+  settings: Array<Map<number, number> | undefined>;
 }
 
 export const overlay = derived(changes, (changes) => {
   const overlay: Overlay = {
-    layout: [new Map(), new Map(), new Map()],
+    layout: [],
     chords: new Map(),
-    settings: new Map(),
+    settings: [],
   };
 
   for (const changeset of changes) {
     for (const change of changeset) {
       switch (change.type) {
         case ChangeType.Layout:
-          overlay.layout[change.layer]?.set(change.id, change.action);
+          change.profile ??= 0;
+          overlay.layout[change.profile] ??= [];
+          overlay.layout[change.profile]![change.layer] ??= new Map();
+          overlay.layout[change.profile]![change.layer]!.set(
+            change.id,
+            change.action,
+          );
           break;
         case ChangeType.Chord:
           overlay.chords.set(JSON.stringify(change.id), {
@@ -71,7 +79,9 @@ export const overlay = derived(changes, (changes) => {
           });
           break;
         case ChangeType.Setting:
-          overlay.settings.set(change.id, change.setting);
+          change.profile ??= 0;
+          overlay.settings[change.profile] ??= new Map();
+          overlay.settings[change.profile]!.set(change.id, change.setting);
           break;
       }
     }
@@ -82,22 +92,26 @@ export const overlay = derived(changes, (changes) => {
 
 export const settings = derived(
   [overlay, deviceSettings],
-  ([overlay, settings]) =>
+  ([overlay, profiles]) =>
+    profiles.map((settings, profile) =>
       settings.map<{ value: number } & ChangeInfo>((value, id) => ({
-      value: overlay.settings.get(id) ?? value,
+        value: overlay.settings[profile]?.get(id) ?? value,
-      isApplied: !overlay.settings.has(id),
+        isApplied: !overlay.settings[profile]?.has(id),
       })),
+    ),
 );
 
 export type KeyInfo = { action: number } & ChangeInfo;
-export const layout = derived([overlay, deviceLayout], ([overlay, layout]) =>
+export const layout = derived([overlay, deviceLayout], ([overlay, profiles]) =>
+  profiles.map((layout, profile) =>
     layout.map(
       (actions, layer) =>
         actions.map<KeyInfo>((action, id) => ({
-        action: overlay.layout[layer]?.get(id) ?? action,
+          action: overlay.layout[profile]?.[layer]?.get(id) ?? action,
-        isApplied: !overlay.layout[layer]?.has(id),
+          isApplied: !overlay.layout[profile]?.[layer]?.has(id),
         })) as [KeyInfo, KeyInfo, KeyInfo],
     ),
+  ),
 );
 
 export type ChordInfo = Chord &

src/lib/util/from-readable.ts

@@ -0,0 +1,10 @@
+import { Observable } from "rxjs";
+import type { Readable } from "svelte/store";
+
+export function fromReadable<T>(store: Readable<T>): Observable<T> {
+  return new Observable((subscriber) =>
+    store.subscribe((value) => {
+      subscriber.next(value);
+    }),
+  );
+}

src/routes/(app)/config/EditActions.svelte

@@ -48,10 +48,14 @@
       $syncStatus = "uploading";
 
       const layoutChanges = $overlay.layout.reduce(
-        (acc, layer) => acc + layer.size,
+        (acc, profile) =>
+          acc + profile.reduce((acc, layer) => acc + layer.size, 0),
+        0,
+      );
+      const settingChanges = $overlay.settings.reduce(
+        (acc, profile) => acc + profile.size,
         0,
       );
-      const settingChanges = $overlay.settings.size;
       const chordChanges = $overlay.chords.size;
       const needsCommit = settingChanges > 0 || layoutChanges > 0;
       const progressMax = layoutChanges + settingChanges + chordChanges;
@@ -63,6 +67,8 @@
         current: progressCurrent,
       });
 
+      console.log($overlay);
+
       for (const [id, chord] of $overlay.chords) {
         if (!chord.deleted) {
           if (id !== JSON.stringify(chord.actions)) {
@@ -105,23 +111,32 @@
         });
       }
 
-      for (const [layer, actions] of $overlay.layout.entries()) {
+      for (const [profile, layout] of $overlay.layout.entries()) {
+        if (layout === undefined) continue;
+        for (const [layer, actions] of layout.entries()) {
+          if (actions === undefined) continue;
           for (const [id, action] of actions) {
-          await port.setLayoutKey(layer + 1, id, action);
+            if (action === undefined) continue;
+            await port.setLayoutKey(profile, layer + 1, id, action);
             syncProgress.set({
               max: progressMax,
               current: progressCurrent++,
             });
           }
         }
+      }
 
-      for (const [id, setting] of $overlay.settings) {
+      for (const [profile, settings] of $overlay.settings.entries()) {
-        await port.setSetting(id, setting);
+        if (settings === undefined) continue;
+        for (const [id, setting] of settings.entries()) {
+          if (setting === undefined) continue;
+          await port.setSetting(profile, id, setting);
           syncProgress.set({
             max: progressMax,
             current: progressCurrent++,
           });
         }
+      }
 
       // Yes, this is a completely arbitrary and unnecessary delay.
       // The only purpose of it is to create a sense of weight,
@@ -134,13 +149,15 @@
         await port.commit();
       }
 
-      $deviceLayout = $layout.map((layer) =>
+      $deviceLayout = $layout.map((profile) =>
-        layer.map<number>(({ action }) => action),
+        profile.map((layer) => layer.map<number>(({ action }) => action)),
-      ) as [number[], number[], number[]];
+      );
       $deviceChords = $chords
         .filter(({ deleted }) => !deleted)
         .map(({ actions, phrase }) => ({ actions, phrase }));
-      $deviceSettings = $settings.map(({ value }) => value);
+      $deviceSettings = $settings.map((profile) =>
+        profile.map(({ value }) => value),
+      );
       $changes = [];
     } catch (e) {
       alert(e);

src/routes/(app)/config/Navigation.svelte

@@ -2,6 +2,7 @@
   import { fly } from "svelte/transition";
   import { canShare, triggerShare } from "$lib/share";
   import { action } from "$lib/title";
+  import { activeProfile, serialPort } from "$lib/serial/connection";
   import LL from "$i18n/i18n-svelte";
   import EditActions from "./EditActions.svelte";
 </script>
@@ -11,6 +12,23 @@
     <EditActions />
   </div>
 
+  <div class="profiles">
+    {#if $serialPort}
+      {#if $serialPort.profileCount > 1}
+        {#each Array.from({ length: $serialPort.profileCount }, (_, i) => i) as profile}
+          <label
+            ><input
+              type="radio"
+              name="profile"
+              checked={profile == $activeProfile}
+              onclick={() => ($activeProfile = profile)}
+            />{String.fromCodePoint("A".codePointAt(0)! + profile)}</label
+          >
+        {/each}
+      {/if}
+    {/if}
+  </div>
+
   <div class="actions">
     {#if $canShare}
       <button
@@ -37,7 +55,7 @@
 <style lang="scss">
   nav {
     display: grid;
-    grid-template-columns: 1fr 1fr;
+    grid-template-columns: 1fr auto 1fr;
 
     width: calc(min(100%, 28cm));
     margin-block: 8px;
@@ -76,6 +94,13 @@
     }
   }
 
+  .profiles {
+    display: flex;
+    gap: 2px;
+    align-items: center;
+    justify-content: center;
+  }
+
   :disabled {
     pointer-events: none;
     opacity: 0.5;

src/routes/(app)/config/layout/+page.svelte

@@ -6,7 +6,6 @@
   import { charaFileToUriComponent } from "$lib/share/share-url";
   import SharePopup from "../SharePopup.svelte";
   import type { VisualLayoutConfig } from "$lib/components/layout/visual-layout";
-  import { writable } from "svelte/store";
   import { layout } from "$lib/undo-redo";
 
   async function shareLayout(event: Event) {
@@ -49,8 +48,6 @@
     fontSize: 9,
     iconFontSize: 14,
   });
-
-  setContext("active-layer", writable(0));
 </script>
 
 <svelte:head>