Add CefBrowserHost::WasHidden() method for notifying a windowless browser that it has been hidden or shown (issue #909).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1180 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/capi/cef_browser_capi.h

@@ -339,6 +339,13 @@ typedef struct _cef_browser_host_t {
   ///
   void (CEF_CALLBACK *was_resized)(struct _cef_browser_host_t* self);
 
+  ///
+  // Notify the browser that it has been hidden or shown. Layouting and
+  // cef_render_handler_t::OnPaint notification will stop when the browser is
+  // hidden. This function is only used when window rendering is disabled.
+  ///
+  void (CEF_CALLBACK *was_hidden)(struct _cef_browser_host_t* self, int hidden);
+
   ///
   // Invalidate the |dirtyRect| region of the view. The browser will call
   // cef_render_handler_t::OnPaint asynchronously with the updated regions. This

include/cef_browser.h

@@ -380,6 +380,14 @@ class CefBrowserHost : public virtual CefBase {
   /*--cef()--*/
   virtual void WasResized() =0;
 
+  ///
+  // Notify the browser that it has been hidden or shown. Layouting and
+  // CefRenderHandler::OnPaint notification will stop when the browser is
+  // hidden. This method is only used when window rendering is disabled.
+  ///
+  /*--cef()--*/
+  virtual void WasHidden(bool hidden) =0;
+
   ///
   // Invalidate the |dirtyRect| region of the view. The browser will call
   // CefRenderHandler::OnPaint asynchronously with the updated regions. This

libcef/browser/browser_host_impl.cc

@@ -641,6 +641,32 @@ void CefBrowserHostImpl::WasResized() {
     widget->WasResized();
 }
 
+void CefBrowserHostImpl::WasHidden(bool hidden) {
+  if (!IsWindowRenderingDisabled()) {
+    NOTREACHED() << "Window rendering is not disabled";
+    return;
+  }
+
+  if (!CEF_CURRENTLY_ON_UIT()) {
+    CEF_POST_TASK(CEF_UIT,
+        base::Bind(&CefBrowserHostImpl::WasHidden, this, hidden));
+    return;
+  }
+
+  if (!web_contents())
+    return;
+
+  content::RenderWidgetHostImpl* widget =
+      content::RenderWidgetHostImpl::From(web_contents()->GetRenderViewHost());
+  if (!widget)
+    return;
+
+  if (hidden) 
+    widget->WasHidden();
+  else
+    widget->WasShown();
+}
+
 void CefBrowserHostImpl::Invalidate(const CefRect& dirtyRect,
                                     PaintElementType type) {
   if (!IsWindowRenderingDisabled()) {
@@ -848,6 +874,7 @@ void CefBrowserHostImpl::SendFocusEvent(bool setFocus) {
     widget->Blur();
   }
 }
+
 void CefBrowserHostImpl::SendCaptureLostEvent() {
   if (!CEF_CURRENTLY_ON_UIT()) {
     CEF_POST_TASK(CEF_UIT,

libcef/browser/browser_host_impl.h

@@ -129,6 +129,7 @@ class CefBrowserHostImpl : public CefBrowserHost,
   virtual bool IsMouseCursorChangeDisabled() OVERRIDE;
   virtual bool IsWindowRenderingDisabled() OVERRIDE;
   virtual void WasResized() OVERRIDE;
+  virtual void WasHidden(bool hidden) OVERRIDE;
   virtual void Invalidate(const CefRect& dirtyRect,
                           PaintElementType type) OVERRIDE;
   virtual void SendKeyEvent(const CefKeyEvent& event) OVERRIDE;

libcef_dll/cpptoc/browser_host_cpptoc.cc

@@ -335,6 +335,19 @@ void CEF_CALLBACK browser_host_was_resized(struct _cef_browser_host_t* self) {
   CefBrowserHostCppToC::Get(self)->WasResized();
 }
 
+void CEF_CALLBACK browser_host_was_hidden(struct _cef_browser_host_t* self,
+    int hidden) {
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return;
+
+  // Execute
+  CefBrowserHostCppToC::Get(self)->WasHidden(
+      hidden?true:false);
+}
+
 void CEF_CALLBACK browser_host_invalidate(struct _cef_browser_host_t* self,
     const cef_rect_t* dirtyRect, enum cef_paint_element_type_t type) {
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
@@ -504,6 +517,7 @@ CefBrowserHostCppToC::CefBrowserHostCppToC(CefBrowserHost* cls)
   struct_.struct_.is_window_rendering_disabled =
       browser_host_is_window_rendering_disabled;
   struct_.struct_.was_resized = browser_host_was_resized;
+  struct_.struct_.was_hidden = browser_host_was_hidden;
   struct_.struct_.invalidate = browser_host_invalidate;
   struct_.struct_.send_key_event = browser_host_send_key_event;
   struct_.struct_.send_mouse_click_event = browser_host_send_mouse_click_event;

libcef_dll/ctocpp/browser_host_ctocpp.cc

@@ -279,6 +279,17 @@ void CefBrowserHostCToCpp::WasResized() {
   struct_->was_resized(struct_);
 }
 
+void CefBrowserHostCToCpp::WasHidden(bool hidden) {
+  if (CEF_MEMBER_MISSING(struct_, was_hidden))
+    return;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  struct_->was_hidden(struct_,
+      hidden);
+}
+
 void CefBrowserHostCToCpp::Invalidate(const CefRect& dirtyRect,
     PaintElementType type) {
   if (CEF_MEMBER_MISSING(struct_, invalidate))

libcef_dll/ctocpp/browser_host_ctocpp.h

@@ -56,6 +56,7 @@ class CefBrowserHostCToCpp
   virtual bool IsMouseCursorChangeDisabled() OVERRIDE;
   virtual bool IsWindowRenderingDisabled() OVERRIDE;
   virtual void WasResized() OVERRIDE;
+  virtual void WasHidden(bool hidden) OVERRIDE;
   virtual void Invalidate(const CefRect& dirtyRect,
       PaintElementType type) OVERRIDE;
   virtual void SendKeyEvent(const CefKeyEvent& event) OVERRIDE;