Add window_set_fullscreen Window API

webview.h

@@ -33,6 +33,7 @@ extern "C" {
 #endif
 
 typedef void *webview_t;
+typedef void *window_t;
 
 // Creates a new webview instance. If debug is non-zero - developer tools will
 // be enabled (if the platform supports them). Window parameter can be a
@@ -107,6 +108,9 @@ WEBVIEW_API void webview_bind(webview_t w, const char *name,
 WEBVIEW_API void webview_return(webview_t w, const char *seq, int status,
                                 const char *result);
 
+// TODO doc
+WEBVIEW_API void window_set_fullscreen(void *window, int fullscreen);
+
 #ifdef __cplusplus
 }
 #endif
@@ -480,7 +484,7 @@ class gtk_webkit_engine {
 
     gtk_widget_show_all(m_window);
   }
-  void *window() { return (void *)m_window; }
+  window_t window() { return &m_window; }
   void run() { gtk_main(); }
   void terminate() { gtk_main_quit(); }
   void dispatch(std::function<void()> f) {
@@ -541,6 +545,26 @@ using browser_engine = gtk_webkit_engine;
 
 } // namespace webview
 
+namespace window {
+class linux_window {
+public:
+  linux_window(void *wnd) { m_window = static_cast<GtkWidget *>(wnd); }
+
+  void set_fullscreen(bool fullscreen) {
+    if (fullscreen) {
+      gtk_window_fullscreen(GTK_WINDOW(m_window));
+    } else {
+      gtk_window_unfullscreen(GTK_WINDOW(m_window));
+    }
+  }
+
+private:
+  GtkWidget *m_window;
+};
+
+using native_window = linux_window;
+} // namespace window
+
 #elif defined(WEBVIEW_COCOA)
 
 //
@@ -563,6 +587,7 @@ using browser_engine = gtk_webkit_engine;
 #define NSWindowStyleMaskMiniaturizable 4
 #define NSWindowStyleMaskTitled 1
 #define NSWindowStyleMaskClosable 2
+#define NSWindowStyleMaskFullScreen (1 << 14)
 
 #define NSApplicationActivationPolicyRegular 0
 
@@ -651,7 +676,7 @@ class cocoa_wkwebview_engine {
     objc_msgSend(m_window, "makeKeyAndOrderFront:"_sel, nullptr);
   }
   ~cocoa_wkwebview_engine() { close(); }
-  void *window() { return (void *)m_window; }
+  window_t window() { return &m_window; }
   void terminate() {
     close();
     objc_msgSend("NSApp"_cls, "terminate:"_sel, nullptr);
@@ -729,6 +754,31 @@ using browser_engine = cocoa_wkwebview_engine;
 
 } // namespace webview
 
+namespace window {
+class mac_window {
+public:
+  mac_window(void *wnd) { m_window = (id)wnd; }
+
+  void set_fullscreen(bool fullscreen) {
+    auto windowStyleMask =
+        (unsigned long)objc_msgSend(m_window, sel_registerName("styleMask"));
+
+    auto b = ((windowStyleMask & NSWindowStyleMaskFullScreen) ==
+              NSWindowStyleMaskFullScreen)
+                 ? true
+                 : false;
+    if (b != fullscreen) {
+      objc_msgSend(m_window, sel_registerName("toggleFullScreen:"), NULL);
+    }
+  }
+
+private:
+  id m_window;
+};
+
+using native_window = mac_window;
+} // namespace window
+
 #elif defined(WEBVIEW_EDGE)
 
 //
@@ -1082,7 +1132,7 @@ class win32_edge_engine {
       }
     }
   }
-  void *window() { return (void *)m_window; }
+  window_t window() { return &m_window; }
   void terminate() { PostQuitMessage(0); }
   void dispatch(dispatch_fn_t f) {
     PostThreadMessage(m_main_thread, WM_APP, 0, (LPARAM) new dispatch_fn_t(f));
@@ -1138,6 +1188,54 @@ class win32_edge_engine {
 using browser_engine = win32_edge_engine;
 } // namespace webview
 
+namespace window {
+class windows_window {
+public:
+  windows_window(void *wnd) { m_window = *(static_cast<HWND *>(wnd)); }
+
+  void set_fullscreen(bool fullscreen) {
+    saved_style = GetWindowLong(m_window, GWL_STYLE);
+    saved_ex_style = GetWindowLong(m_window, GWL_EXSTYLE);
+    GetWindowRect(m_window, &saved_rect);
+    if (fullscreen) {
+      MONITORINFO monitor_info;
+      SetWindowLong(m_window, GWL_STYLE,
+                    saved_style & ~(WS_CAPTION | WS_THICKFRAME));
+      SetWindowLong(m_window, GWL_EXSTYLE,
+                    saved_ex_style & ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE |
+                                       WS_EX_CLIENTEDGE | WS_EX_STATICEDGE));
+      monitor_info.cbSize = sizeof(monitor_info);
+      GetMonitorInfo(MonitorFromWindow(m_window, MONITOR_DEFAULTTONEAREST),
+                     &monitor_info);
+      RECT r;
+      r.left = monitor_info.rcMonitor.left;
+      r.top = monitor_info.rcMonitor.top;
+      r.right = monitor_info.rcMonitor.right;
+      r.bottom = monitor_info.rcMonitor.bottom;
+      SetWindowPos(m_window, NULL, r.left, r.top, r.right - r.left,
+                   r.bottom - r.top,
+                   SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED);
+    } else {
+      SetWindowLong(m_window, GWL_STYLE, saved_style);
+      SetWindowLong(m_window, GWL_EXSTYLE, saved_ex_style);
+      SetWindowPos(m_window, NULL, saved_rect.left, saved_rect.top,
+                   saved_rect.right - saved_rect.left,
+                   saved_rect.bottom - saved_rect.top,
+                   SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED);
+    }
+  }
+
+private:
+  HWND m_window;
+  bool is_fullscreen = false;
+  DWORD saved_style = 0;
+  DWORD saved_ex_style = 0;
+  RECT saved_rect;
+};
+
+using native_window = windows_window;
+} // namespace window
+
 #endif /* WEBVIEW_GTK, WEBVIEW_COCOA, WEBVIEW_EDGE */
 
 namespace webview {
@@ -1227,6 +1325,13 @@ class webview : public browser_engine {
 };
 } // namespace webview
 
+namespace window {
+class window : public native_window {
+public:
+  window(void *wnd) : native_window(wnd) {}
+};
+} // namespace window
+
 WEBVIEW_API webview_t webview_create(int debug, void *wnd) {
   return new webview::webview(debug, wnd);
 }
@@ -1290,6 +1395,10 @@ WEBVIEW_API void webview_return(webview_t w, const char *seq, int status,
   static_cast<webview::webview *>(w)->resolve(seq, status, result);
 }
 
+WEBVIEW_API void window_set_fullscreen(webview_t wnd, int fullscreen) {
+  static_cast<window::window *>(wnd)->set_fullscreen(fullscreen);
+}
+
 #endif /* WEBVIEW_HEADER */
 
 #endif /* WEBVIEW_H */

webview_test.cc

@@ -37,6 +37,8 @@ static void test_c_api() {
   webview_navigate(w, "https://github.com/zserge/webview");
   webview_dispatch(w, cb_assert_arg, (void *)"arg");
   webview_dispatch(w, cb_terminate, nullptr);
+  window_t wnd = webview_get_window(w);
+  window_set_fullscreen(wnd, 1);
   webview_run(w);
   webview_destroy(w);
 }