refactor: move related apis into one file

packages/common/src/constants.ts

@@ -6,32 +6,6 @@ import type { AppProps, AppState } from "@excalidraw/excalidraw/types";
 
 import { COLOR_PALETTE } from "./colors";
 
-export const isDarwin = /Mac|iPod|iPhone|iPad/.test(navigator.platform);
-export const isWindows = /^Win/.test(navigator.platform);
-export const isAndroid = /\b(android)\b/i.test(navigator.userAgent);
-export const isFirefox =
-  typeof window !== "undefined" &&
-  "netscape" in window &&
-  navigator.userAgent.indexOf("rv:") > 1 &&
-  navigator.userAgent.indexOf("Gecko") > 1;
-export const isChrome = navigator.userAgent.indexOf("Chrome") !== -1;
-export const isSafari =
-  !isChrome && navigator.userAgent.indexOf("Safari") !== -1;
-export const isIOS =
-  /iPad|iPhone/i.test(navigator.platform) ||
-  // iPadOS 13+
-  (navigator.userAgent.includes("Mac") && "ontouchend" in document);
-// keeping function so it can be mocked in test
-export const isBrave = () =>
-  (navigator as any).brave?.isBrave?.name === "isBrave";
-
-export const isMobile =
-  isIOS ||
-  /android|webos|ipod|blackberry|iemobile|opera mini/i.test(
-    navigator.userAgent,
-  ) ||
-  /android|ios|ipod|blackberry|windows phone/i.test(navigator.platform);
-
 export const supportsResizeObserver =
   typeof window !== "undefined" && "ResizeObserver" in window;
 

packages/common/src/editorInterface.ts

@@ -0,0 +1,152 @@
+export type StylesPanelMode = "compact" | "full" | "mobile";
+
+export type EditorInterface = Readonly<{
+  formFactor: "phone" | "tablet" | "desktop";
+  desktopUIMode: "compact" | "full";
+  userAgent: Readonly<{
+    raw: string;
+    isMobileDevice: boolean;
+    platform: "ios" | "android" | "other" | "unknown";
+  }>;
+  isTouchScreen: boolean;
+  canFitSidebar: boolean;
+  isLandscape: boolean;
+}>;
+
+export const DESKTOP_UI_MODE_STORAGE_KEY = "excalidraw.desktopUIMode";
+
+export const isDarwin = /Mac|iPod|iPhone|iPad/.test(navigator.platform);
+export const isWindows = /^Win/.test(navigator.platform);
+export const isAndroid = /\b(android)\b/i.test(navigator.userAgent);
+export const isFirefox =
+  typeof window !== "undefined" &&
+  "netscape" in window &&
+  navigator.userAgent.indexOf("rv:") > 1 &&
+  navigator.userAgent.indexOf("Gecko") > 1;
+export const isChrome = navigator.userAgent.indexOf("Chrome") !== -1;
+export const isSafari =
+  !isChrome && navigator.userAgent.indexOf("Safari") !== -1;
+export const isIOS =
+  /iPad|iPhone/i.test(navigator.platform) ||
+  // iPadOS 13+
+  (navigator.userAgent.includes("Mac") && "ontouchend" in document);
+// keeping function so it can be mocked in test
+export const isBrave = () =>
+  (navigator as any).brave?.isBrave?.name === "isBrave";
+
+export const isMobile =
+  isIOS ||
+  /android|webos|ipod|blackberry|iemobile|opera mini/i.test(
+    navigator.userAgent,
+  ) ||
+  /android|ios|ipod|blackberry|windows phone/i.test(navigator.platform);
+
+export const isMobileOrTablet = (): boolean => {
+  const ua = navigator.userAgent || "";
+  const platform = navigator.platform || "";
+  const uaData = (navigator as any).userAgentData as
+    | { mobile?: boolean; platform?: string }
+    | undefined;
+
+  // --- 1) chromium: prefer ua client hints -------------------------------
+  if (uaData) {
+    const plat = (uaData.platform || "").toLowerCase();
+    const isDesktopOS =
+      plat === "windows" ||
+      plat === "macos" ||
+      plat === "linux" ||
+      plat === "chrome os";
+    if (uaData.mobile === true) {
+      return true;
+    }
+    if (uaData.mobile === false && plat === "android") {
+      const looksTouchTablet =
+        matchMedia?.("(hover: none)").matches &&
+        matchMedia?.("(pointer: coarse)").matches;
+      return looksTouchTablet;
+    }
+    if (isDesktopOS) {
+      return false;
+    }
+  }
+
+  // --- 2) ios (includes ipad) --------------------------------------------
+  if (isIOS) {
+    return true;
+  }
+
+  // --- 3) android legacy ua fallback -------------------------------------
+  if (isAndroid) {
+    const isAndroidPhone = /Mobile/i.test(ua);
+    const isAndroidTablet = !isAndroidPhone;
+    if (isAndroidPhone || isAndroidTablet) {
+      const looksTouchTablet =
+        matchMedia?.("(hover: none)").matches &&
+        matchMedia?.("(pointer: coarse)").matches;
+      return looksTouchTablet;
+    }
+  }
+
+  // --- 4) last resort desktop exclusion ----------------------------------
+  const looksDesktopPlatform =
+    /Win|Linux|CrOS|Mac/.test(platform) ||
+    /Windows NT|X11|CrOS|Macintosh/.test(ua);
+  if (looksDesktopPlatform) {
+    return false;
+  }
+  return false;
+};
+
+export const deriveFormFactor = (
+  editorWidth: number,
+  editorHeight: number,
+  breakpoints: {
+    isMobile: (width: number, height: number) => boolean;
+    isTablet: (width: number, height: number) => boolean;
+  },
+): EditorInterface["formFactor"] => {
+  if (breakpoints.isMobile(editorWidth, editorHeight)) {
+    return "phone";
+  }
+
+  if (breakpoints.isTablet(editorWidth, editorHeight)) {
+    return "tablet";
+  }
+
+  return "desktop";
+};
+
+export const deriveStylesPanelMode = (
+  editorInterface: EditorInterface,
+): StylesPanelMode => {
+  if (editorInterface.formFactor === "phone") {
+    return "mobile";
+  }
+
+  if (editorInterface.formFactor === "tablet") {
+    return "compact";
+  }
+
+  return editorInterface.desktopUIMode;
+};
+
+export const createUserAgentDescriptor = (
+  userAgentString: string,
+): EditorInterface["userAgent"] => {
+  const normalizedUA = userAgentString ?? "";
+  let platform: EditorInterface["userAgent"]["platform"] = "unknown";
+
+  if (isIOS) {
+    platform = "ios";
+  } else if (isAndroid) {
+    platform = "android";
+  } else if (normalizedUA) {
+    platform = "other";
+  }
+
+  return {
+    raw: normalizedUA,
+    isMobileDevice: isMobileOrTablet(),
+    platform,
+  } as const;
+};

packages/common/src/index.ts

@@ -10,3 +10,4 @@ export * from "./random";
 export * from "./url";
 export * from "./utils";
 export * from "./emitter";
+export * from "./editorInterface";

packages/common/src/keys.ts

@@ -1,4 +1,4 @@
-import { isDarwin } from "./constants";
+import { isDarwin } from "./editorInterface";
 
 import type { ValueOf } from "./utility-types";
 

packages/common/src/utils.ts

@@ -20,12 +20,11 @@ import {
   ENV,
   FONT_FAMILY,
   getFontFamilyFallbacks,
-  isDarwin,
-  isAndroid,
-  isIOS,
   WINDOWS_EMOJI_FALLBACK_FONT,
 } from "./constants";
 
+import { isDarwin } from "./editorInterface";
+
 import type { MaybePromise, ResolutionType } from "./utility-types";
 
 import type { EVENT } from "./constants";
@@ -1286,59 +1285,3 @@ export const reduceToCommonValue = <T, R = T>(
 
   return commonValue;
 };
-
-export const isMobileOrTablet = (): boolean => {
-  const ua = navigator.userAgent || "";
-  const platform = navigator.platform || "";
-  const uaData = (navigator as any).userAgentData as
-    | { mobile?: boolean; platform?: string }
-    | undefined;
-
-  // --- 1) chromium: prefer ua client hints -------------------------------
-  if (uaData) {
-    const plat = (uaData.platform || "").toLowerCase();
-    const isDesktopOS =
-      plat === "windows" ||
-      plat === "macos" ||
-      plat === "linux" ||
-      plat === "chrome os";
-    if (uaData.mobile === true) {
-      return true;
-    }
-    if (uaData.mobile === false && plat === "android") {
-      const looksTouchTablet =
-        matchMedia?.("(hover: none)").matches &&
-        matchMedia?.("(pointer: coarse)").matches;
-      return looksTouchTablet;
-    }
-    if (isDesktopOS) {
-      return false;
-    }
-  }
-
-  // --- 2) ios (includes ipad) --------------------------------------------
-  if (isIOS) {
-    return true;
-  }
-
-  // --- 3) android legacy ua fallback -------------------------------------
-  if (isAndroid) {
-    const isAndroidPhone = /Mobile/i.test(ua);
-    const isAndroidTablet = !isAndroidPhone;
-    if (isAndroidPhone || isAndroidTablet) {
-      const looksTouchTablet =
-        matchMedia?.("(hover: none)").matches &&
-        matchMedia?.("(pointer: coarse)").matches;
-      return looksTouchTablet;
-    }
-  }
-
-  // --- 4) last resort desktop exclusion ----------------------------------
-  const looksDesktopPlatform =
-    /Win|Linux|CrOS|Mac/.test(platform) ||
-    /Windows NT|X11|CrOS|Macintosh/.test(ua);
-  if (looksDesktopPlatform) {
-    return false;
-  }
-  return false;
-};