fix(desktop): remove titlebar inset in fullscreen

packages/app/src/components/titlebar-padding.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, test } from "bun:test"
+import { macTitlebarLeftPadding } from "./titlebar-padding"
+
+describe("macOS titlebar padding", () => {
+  test("reserves traffic light space while windowed", () => {
+    expect(macTitlebarLeftPadding(1, false)).toBe("84px")
+    expect(macTitlebarLeftPadding(2, false)).toBe("42px")
+  })
+
+  test("does not reserve traffic light space in fullscreen", () => {
+    expect(macTitlebarLeftPadding(1, true)).toBe("0px")
+  })
+})

packages/app/src/components/titlebar-padding.ts

@@ -0,0 +1,6 @@
+const macTrafficLightsWidth = 84
+
+export function macTitlebarLeftPadding(zoom: number, fullscreen: boolean) {
+  if (fullscreen) return "0px"
+  return `${macTrafficLightsWidth / zoom}px`
+}

packages/app/src/components/titlebar.tsx

@@ -5,7 +5,6 @@ import { IconButton } from "@opencode-ai/ui/icon-button"
 import { Icon } from "@opencode-ai/ui/icon"
 import { Button } from "@opencode-ai/ui/button"
 import { Tooltip, TooltipKeybind } from "@opencode-ai/ui/tooltip"
-import { useTheme } from "@opencode-ai/ui/theme/context"
 import { IconButtonV2 } from "@opencode-ai/ui/v2/icon-button-v2"
 import { Icon as IconV2 } from "@opencode-ai/ui/v2/icon"
 import { KeybindV2 } from "@opencode-ai/ui/v2/keybind-v2"
@@ -29,28 +28,8 @@ import type { PromptSession } from "@/context/prompt"
 import "./titlebar.css"
 import { newTabTooltipKeybind } from "./command-tooltip-keybind"
 import { normalizeSessionInfo } from "@/utils/session"
+import { macTitlebarLeftPadding } from "./titlebar-padding"
 
-type TauriDesktopWindow = {
-  startDragging?: () => Promise<void>
-  toggleMaximize?: () => Promise<void>
-}
-
-type TauriThemeWindow = {
-  setTheme?: (theme?: "light" | "dark" | null) => Promise<void>
-}
-
-type TauriApi = {
-  window?: {
-    getCurrentWindow?: () => TauriDesktopWindow
-  }
-  webviewWindow?: {
-    getCurrentWebviewWindow?: () => TauriThemeWindow
-  }
-}
-
-const tauriApi = () => (window as unknown as { __TAURI__?: TauriApi }).__TAURI__
-const currentDesktopWindow = () => tauriApi()?.window?.getCurrentWindow?.()
-const currentThemeWindow = () => tauriApi()?.webviewWindow?.getCurrentWebviewWindow?.()
 const legacyTitlebarHeight = 40
 const v2TitlebarHeight = 36
 const minTitlebarZoom = 0.25
@@ -74,7 +53,6 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
   const command = useCommand()
   const language = useLanguage()
   const settings = useSettings()
-  const theme = useTheme()
   const server = useServer()
   const navigate = useNavigate()
   const location = useLocation()
@@ -85,7 +63,6 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
 
   const mac = createMemo(() => platform.platform === "desktop" && platform.os === "macos")
   const windows = createMemo(() => platform.platform === "desktop" && platform.os === "windows")
-  const electronWindows = createMemo(() => windows() && !tauriApi())
   const linux = createMemo(() => platform.platform === "desktop" && platform.os === "linux")
   const web = createMemo(() => platform.platform === "web")
   const zoom = () => platform.webviewZoom?.() ?? 1
@@ -176,56 +153,6 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
     },
   ])
 
-  const getWin = () => {
-    if (platform.platform !== "desktop") return
-    return currentDesktopWindow()
-  }
-
-  createEffect(() => {
-    if (platform.platform !== "desktop") return
-
-    const scheme = theme.colorScheme()
-    const value = scheme === "system" ? null : scheme
-
-    const win = currentThemeWindow()
-    if (!win?.setTheme) return
-
-    void win.setTheme(value).catch(() => undefined)
-  })
-
-  const interactive = (target: EventTarget | null) => {
-    if (!(target instanceof Element)) return false
-
-    const selector =
-      "button, a, input, textarea, select, option, [role='button'], [role='menuitem'], [contenteditable='true'], [contenteditable='']"
-
-    return !!target.closest(selector)
-  }
-
-  const drag = (e: MouseEvent) => {
-    if (platform.platform !== "desktop") return
-    if (e.buttons !== 1) return
-    if (interactive(e.target)) return
-
-    const win = getWin()
-    if (!win?.startDragging) return
-
-    e.preventDefault()
-    void win.startDragging().catch(() => undefined)
-  }
-
-  const maximize = (e: MouseEvent) => {
-    if (platform.platform !== "desktop") return
-    if (interactive(e.target)) return
-    if (e.target instanceof Element && e.target.closest("[data-tauri-decorum-tb]")) return
-
-    const win = getWin()
-    if (!win?.toggleMaximize) return
-
-    e.preventDefault()
-    void win.toggleMaximize().catch(() => undefined)
-  }
-
   return (
     <header
       data-slot={useV2Titlebar() ? "titlebar-v2" : undefined}
@@ -237,17 +164,13 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
       }}
       style={{
         "min-height": minHeight(),
-        // Keep native macOS traffic lights clear even when the desktop window is narrow.
-        "padding-left": mac() ? `${84 / zoom()}px` : 0,
-        width: electronWindows() ? `env(titlebar-area-width, calc(100vw - ${windowsControlsWidth()}))` : undefined,
-        "max-width": electronWindows()
-          ? `env(titlebar-area-width, calc(100vw - ${windowsControlsWidth()}))`
-          : undefined,
-        "align-self": electronWindows() ? "flex-start" : undefined,
+        // Keep visible native macOS traffic lights clear even when the desktop window is narrow.
+        "padding-left": mac() ? macTitlebarLeftPadding(zoom(), platform.windowFullscreen?.() ?? false) : 0,
+        width: windows() ? `env(titlebar-area-width, calc(100vw - ${windowsControlsWidth()}))` : undefined,
+        "max-width": windows() ? `env(titlebar-area-width, calc(100vw - ${windowsControlsWidth()}))` : undefined,
+        "align-self": windows() ? "flex-start" : undefined,
       }}
       data-tauri-drag-region
-      onMouseDown={drag}
-      onDblClick={maximize}
     >
       <Switch>
         <Match when={useV2Titlebar()}>
@@ -528,9 +451,6 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
                 </Show>
                 <div class="flex-1" />
                 <TitlebarV2Right state={v2RightState()} />
-                <Show when={windows() && !electronWindows()}>
-                  <div data-tauri-decorum-tb class="flex flex-row" />
-                </Show>
               </div>
             )
           }}
@@ -550,7 +470,6 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
                 <WindowsAppMenu command={command} platform={platform} />
               </Show>
               <Show when={mac()}>
-                {/*<div class="h-full shrink-0" style={{ width: `${72 / zoom()}px` }} />*/}
                 <div class="xl:hidden w-10 shrink-0 flex items-center justify-center">
                   <IconButton
                     icon="menu"
@@ -680,12 +599,10 @@ export function Titlebar(props: { update?: TitlebarUpdate; debugTools?: { visibl
                 "pr-2": !windows(),
               }}
               data-tauri-drag-region
-              onMouseDown={drag}
             >
               <div id="opencode-titlebar-right" class="flex items-center gap-1 shrink-0 justify-end" />
               <Show when={windows()}>
-                {!tauriApi() && <div class="shrink-0" style={{ width: windowsControlsWidth() }} />}
-                <div data-tauri-decorum-tb class="flex flex-row" />
+                <div class="shrink-0" style={{ width: windowsControlsWidth() }} />
               </Show>
             </div>
           </div>

packages/app/src/context/platform.tsx

@@ -97,6 +97,9 @@ type PlatformBase = {
   /** Webview zoom level (desktop only) */
   webviewZoom?: Accessor<number>
 
+  /** Whether the native desktop window is fullscreen */
+  windowFullscreen?: Accessor<boolean>
+
   /** Get whether native pinch/Ctrl-scroll zoom gestures are enabled (desktop only) */
   getPinchZoomEnabled?(): Promise<boolean> | boolean
 

packages/desktop/src/main/ipc.ts

@@ -227,6 +227,11 @@ export function registerIpcHandlers(deps: Deps) {
     return win?.isFocused() ?? false
   })
 
+  ipcMain.handle("get-window-fullscreen", (event: IpcMainInvokeEvent) => {
+    const win = BrowserWindow.fromWebContents(event.sender)
+    return win?.isFullScreen() ?? false
+  })
+
   ipcMain.handle("set-window-focus", (event: IpcMainInvokeEvent) => {
     const win = BrowserWindow.fromWebContents(event.sender)
     win?.focus()

packages/desktop/src/main/windows.ts

@@ -219,6 +219,7 @@ export function createMainWindow(id: string = randomUUID()) {
 
   state.manage(win)
   registerWindow(win, id)
+  wireFullscreen(win)
   loadWindow(win, "index.html")
   wireZoom(win)
 
@@ -472,6 +473,11 @@ function wireZoom(win: BrowserWindow) {
   })
 }
 
+function wireFullscreen(win: BrowserWindow) {
+  win.on("enter-full-screen", () => win.webContents.send("window-fullscreen-changed", true))
+  win.on("leave-full-screen", () => win.webContents.send("window-fullscreen-changed", false))
+}
+
 function clampZoom(value: number) {
   return Math.min(Math.max(value, minZoomLevel), maxZoomLevel)
 }

packages/desktop/src/preload/index.ts

@@ -100,6 +100,12 @@ const api: ElectronAPI = {
   readClipboardImage: () => ipcRenderer.invoke("read-clipboard-image"),
   showNotification: (title, body) => ipcRenderer.send("show-notification", title, body),
   getWindowFocused: () => ipcRenderer.invoke("get-window-focused"),
+  getWindowFullscreen: () => ipcRenderer.invoke("get-window-fullscreen"),
+  onWindowFullscreenChanged: (cb) => {
+    const handler = (_: unknown, fullscreen: boolean) => cb(fullscreen)
+    ipcRenderer.on("window-fullscreen-changed", handler)
+    return () => ipcRenderer.removeListener("window-fullscreen-changed", handler)
+  },
   setWindowFocus: () => ipcRenderer.invoke("set-window-focus"),
   showWindow: () => ipcRenderer.invoke("show-window"),
   relaunch: () => ipcRenderer.send("relaunch"),

packages/desktop/src/preload/types.ts

@@ -91,6 +91,8 @@ export type ElectronAPI = {
   readClipboardImage: () => Promise<{ buffer: ArrayBuffer; width: number; height: number } | null>
   showNotification: (title: string, body?: string) => void
   getWindowFocused: () => Promise<boolean>
+  getWindowFullscreen: () => Promise<boolean>
+  onWindowFullscreenChanged: (cb: (fullscreen: boolean) => void) => () => void
   setWindowFocus: () => Promise<void>
   showWindow: () => Promise<void>
   relaunch: () => void

packages/desktop/src/renderer/index.tsx

@@ -30,6 +30,10 @@ import "./styles.css"
 import { Splash } from "@opencode-ai/ui/logo"
 import { useTheme } from "@opencode-ai/ui/theme/context"
 
+const [windowFullscreen, setWindowFullscreen] = createSignal(false)
+window.api.onWindowFullscreenChanged(setWindowFullscreen)
+void window.api.getWindowFullscreen().then(setWindowFullscreen)
+
 const root = document.getElementById("root")
 if (import.meta.env.DEV && !(root instanceof HTMLElement)) {
   throw new Error(t("error.dev.rootNotFound"))
@@ -294,6 +298,8 @@ const createPlatform = (windowState: DesktopWindowState): Platform => {
 
     webviewZoom,
 
+    windowFullscreen,
+
     getPinchZoomEnabled: () => window.api.getPinchZoomEnabled(),
 
     setPinchZoomEnabled,