fix(desktop): remove titlebar inset in fullscreen (#38793)

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 +473,16 @@ function wireZoom(win: BrowserWindow) {
   })
 }
 
+function wireFullscreen(win: BrowserWindow) {
+  const send = (fullscreen: boolean) => {
+    if (win.isDestroyed() || win.webContents.isDestroyed()) return
+    win.webContents.send("window-fullscreen-changed", fullscreen)
+  }
+
+  win.on("enter-full-screen", () => send(true))
+  win.on("leave-full-screen", () => send(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

@@ -25,6 +25,7 @@ import { initI18n, t } from "./i18n"
 import { initializationData, initializationReady } from "./initialization"
 import { DesktopFirstLaunchOnboarding } from "./onboarding"
 import { resetZoom, setPinchZoomEnabled, webviewZoom, zoomIn, zoomOut } from "./webview-zoom"
+import { windowFullscreen } from "./window-fullscreen"
 import { availableStartupServer, readyWslConnections } from "./wsl/connections"
 import "./styles.css"
 import { Splash } from "@opencode-ai/ui/logo"
@@ -294,6 +295,8 @@ const createPlatform = (windowState: DesktopWindowState): Platform => {
 
     webviewZoom,
 
+    windowFullscreen,
+
     getPinchZoomEnabled: () => window.api.getPinchZoomEnabled(),
 
     setPinchZoomEnabled,

packages/desktop/src/renderer/window-fullscreen.ts

@@ -0,0 +1,8 @@
+import { createSignal } from "solid-js"
+
+const [windowFullscreen, setWindowFullscreen] = createSignal(false)
+
+window.api.onWindowFullscreenChanged(setWindowFullscreen)
+void window.api.getWindowFullscreen().then(setWindowFullscreen)
+
+export { windowFullscreen }