- Fix initial state of the |is_showing_| flag in CefRenderWidgetHostViewOSR (issue #1363).

- Windows: Modify the cefclient OSR example to call WasHidden(true) when the app is minimized.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1818 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/render_widget_host_view_osr.cc

@@ -155,7 +155,7 @@ CefRenderWidgetHostViewOSR::CefRenderWidgetHostViewOSR(
       render_widget_host_(content::RenderWidgetHostImpl::From(widget)),
       parent_host_view_(NULL),
       popup_host_view_(NULL),
-      is_showing_(false),
+      is_showing_(true),
       is_destroyed_(false),
 #if defined(OS_MACOSX)
       text_input_context_osr_mac_(NULL),

tests/cefclient/cefclient.cpp

@@ -18,7 +18,13 @@
 #include "cefclient/string_util.h"
 
 CefRefPtr<ClientHandler> g_handler;
+
+namespace {
+
 CefRefPtr<CefCommandLine> g_command_line;
+int g_offscreen_state = 0;
+
+}  // namespace
 
 CefRefPtr<CefBrowser> AppGetBrowser() {
   if (!g_handler.get())
@@ -78,11 +84,15 @@ void AppGetBrowserSettings(CefBrowserSettings& settings) {
 }
 
 bool AppIsOffScreenRenderingEnabled() {
-  DCHECK(g_command_line.get());
-  if (!g_command_line.get())
-    return false;
+  if (g_offscreen_state == 0) {
+    // Store the value so it isn't queried multiple times.
+    DCHECK(g_command_line.get());
+    g_offscreen_state =
+        g_command_line->HasSwitch(cefclient::kOffScreenRenderingEnabled) ?
+            1 : 2;
+  }
 
-  return g_command_line->HasSwitch(cefclient::kOffScreenRenderingEnabled);
+  return (g_offscreen_state == 1);
 }
 
 void RunGetSourceTest(CefRefPtr<CefBrowser> browser) {

tests/cefclient/cefclient_osr_widget_win.cpp

@@ -192,6 +192,16 @@ void OSRWindow::Invalidate() {
                      kRenderDelay);
 }
 
+void OSRWindow::WasHidden(bool hidden) {
+  if (hidden == hidden_)
+    return;
+  CefRefPtr<CefBrowser> browser = browser_provider_->GetBrowser();
+  if (!browser)
+    return;
+  browser->GetHost()->WasHidden(hidden);
+  hidden_ = hidden;
+}
+
 CefBrowserHost::DragOperationsMask
     OSRWindow::OnDragEnter(CefRefPtr<CefDragData> drag_data,
                            CefMouseEvent ev,
@@ -226,9 +236,10 @@ OSRWindow::OSRWindow(OSRBrowserProvider* browser_provider, bool transparent)
       hWnd_(NULL),
       hDC_(NULL),
       hRC_(NULL),
+      current_drag_op_(DRAG_OPERATION_NONE),
       painting_popup_(false),
       render_task_pending_(false),
-      current_drag_op_(DRAG_OPERATION_NONE) {
+      hidden_(false) {
 }
 
 OSRWindow::~OSRWindow() {

tests/cefclient/cefclient_osr_widget_win.h

@@ -87,6 +87,7 @@ class OSRWindow : public ClientHandler::RenderHandler,
       CefBrowserHost::DragOperationsMask effect) OVERRIDE;
 
   void Invalidate();
+  void WasHidden(bool hidden);
 
   static int GetCefKeyboardModifiers(WPARAM wparam, LPARAM lparam);
   static int GetCefMouseModifiers(WPARAM wparam);
@@ -119,6 +120,7 @@ class OSRWindow : public ClientHandler::RenderHandler,
 
   bool painting_popup_;
   bool render_task_pending_;
+  bool hidden_;
 
   IMPLEMENT_REFCOUNTING(OSRWindow);
 };

tests/cefclient/cefclient_win.cpp

@@ -597,15 +597,26 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
       return 0;
 
     case WM_SIZE:
-      // Minimizing resizes the window to 0x0 which causes our layout to go all
-      // screwy, so we just ignore it.
-      if (wParam != SIZE_MINIMIZED && g_handler.get() &&
-          g_handler->GetBrowser()) {
+      if (!g_handler.get())
+        break;
+
+      // Mark the off-screen browser as hidden when the frame window is
+      // minimized to reduce resource usage.
+      if (AppIsOffScreenRenderingEnabled()) {
+        CefRefPtr<OSRWindow> osr_window =
+            static_cast<OSRWindow*>(g_handler->GetOSRHandler().get());
+        if (osr_window)
+          osr_window->WasHidden(wParam == SIZE_MINIMIZED);
+      }
+
+      // Don't resize the window if minimizing because the resulting size of 0x0
+      // causes the layout to go all screwy.
+      if (wParam != SIZE_MINIMIZED && g_handler->GetBrowser()) {
+        // Retrieve the window handle (parent window with off-screen rendering).
         CefWindowHandle hwnd =
             g_handler->GetBrowser()->GetHost()->GetWindowHandle();
         if (hwnd) {
-          // Resize the browser window and address bar to match the new frame
-          // window size
+          // Resize the window and address bar to match the new frame size.
           RECT rect;
           GetClientRect(hWnd, &rect);
           rect.top += URLBAR_HEIGHT;