Give prerendering RVH's RenderWidgetHostViews.

chrome/browser/prerender/prerender_render_widget_host_view.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/prerender/prerender_render_widget_host_view.h"
+
+#include "base/logging.h"
+#include "chrome/browser/prerender/prerender_contents.h"
+#include "chrome/browser/prerender/prerender_final_status.h"
+#include "content/browser/renderer_host/render_widget_host.h"
+
+namespace prerender {
+
+PrerenderRenderWidgetHostView::PrerenderRenderWidgetHostView(
+    RenderWidgetHost* render_widget_host,
+    PrerenderContents* prerender_contents)
+    : render_widget_host_(render_widget_host),
+      prerender_contents_(prerender_contents) {
+  render_widget_host_->set_view(this);
+}
+
+PrerenderRenderWidgetHostView::~PrerenderRenderWidgetHostView() {
+}
+
+void PrerenderRenderWidgetHostView::Init(RenderWidgetHostView* view) {
+#if defined(OS_MACOSX)
+  cocoa_view_bounds_ = view->GetViewBounds();
+  root_window_rect_ = view->GetRootWindowRect();
+#endif  // defined(OS_MACOSX)
+  SetBounds(view->GetViewBounds());
+
+  // PrerenderRenderWidgetHostViews are always hidden.  This reduces the
+  // process priority of the render process while prerendering, and prevents it
+  // from painting anything until the page is actually displayed.
+  WasHidden();
+}
+
+void PrerenderRenderWidgetHostView::InitAsPopup(
+    RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::InitAsFullscreen() {
+  NOTREACHED();
+}
+
+RenderWidgetHost* PrerenderRenderWidgetHostView::GetRenderWidgetHost() const {
+  return render_widget_host_;
+}
+
+void PrerenderRenderWidgetHostView::DidBecomeSelected() {
+  // The View won't be shown during prerendering.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::WasHidden() {
+  render_widget_host_->WasHidden();
+}
+
+void PrerenderRenderWidgetHostView::SetSize(const gfx::Size& size) {
+  SetBounds(gfx::Rect(GetViewBounds().origin(), size));
+}
+
+void PrerenderRenderWidgetHostView::SetBounds(const gfx::Rect& rect) {
+  bounds_ = rect;
+  if (render_widget_host_)
+    render_widget_host_->WasResized();
+}
+
+gfx::NativeView PrerenderRenderWidgetHostView::GetNativeView() {
+  return NULL;
+}
+
+void PrerenderRenderWidgetHostView::MovePluginWindows(
+    const std::vector<webkit::npapi::WebPluginGeometry>& moves) {
+  // Since a PrerenderRenderWidgetHostView is always hidden and plugins are not
+  // loaded during prerendering, this will never be called.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::Focus() {
+  // A PrerenderRenderWidgetHostView can never be focused, as it's always
+  // hidden.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::Blur() {
+}
+
+bool PrerenderRenderWidgetHostView::HasFocus() {
+  return false;
+}
+
+void PrerenderRenderWidgetHostView::Show() {
+  // A PrerenderRenderWidgetHostView can never be shown, as it is not yet
+  // associated with a tab.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::Hide() {
+  WasHidden();
+}
+
+bool PrerenderRenderWidgetHostView::IsShowing() {
+  return false;
+}
+
+gfx::Rect PrerenderRenderWidgetHostView::GetViewBounds() const {
+  return bounds_;
+}
+
+void PrerenderRenderWidgetHostView::UpdateCursor(const WebCursor& cursor) {
+  // The cursor should only be updated in response to a mouse event, which
+  // hidden RenderViews don't have.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::SetIsLoading(bool is_loading) {
+  // Do nothing.  PrerenderContents manages this flag.
+}
+
+void PrerenderRenderWidgetHostView::ImeUpdateTextInputState(
+    WebKit::WebTextInputType type,
+    const gfx::Rect& caret_rect) {
+  // Not called on hidden views.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::ImeCancelComposition() {
+  // Not called on hidden views.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::DidUpdateBackingStore(
+    const gfx::Rect& scroll_rect, int scroll_dx, int scroll_dy,
+    const std::vector<gfx::Rect>& copy_rects) {
+  // Since prerendering RenderViewsHosts are always hidden, this will not be
+  // be called.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::RenderViewGone(
+    base::TerminationStatus status, int error_code) {
+  // TODO(mmenke): This should result in the PrerenderContents cancelling the
+  //               prerender itself.
+  Destroy();
+}
+
+void PrerenderRenderWidgetHostView::WillDestroyRenderWidget(
+    RenderWidgetHost* rwh) {
+  if (rwh == render_widget_host_)
+    render_widget_host_ = NULL;
+}
+
+void PrerenderRenderWidgetHostView::Destroy() {
+  delete this;
+}
+
+void PrerenderRenderWidgetHostView::SetTooltipText(
+    const std::wstring& tooltip_text) {
+  // Since this is only set on mouse move and the View can't be focused, this
+  // will never be called.
+  NOTREACHED();
+}
+
+BackingStore* PrerenderRenderWidgetHostView::AllocBackingStore(
+    const gfx::Size& size) {
+  // Since prerendering RenderViewsHosts are always hidden, this will not be
+  // be called.
+  NOTREACHED();
+  return NULL;
+}
+
+#if defined(OS_MACOSX)
+void PrerenderRenderWidgetHostView::SetTakesFocusOnlyOnMouseDown(bool flag) {
+  // This is only used by on RenderWidgetHosts currently in a TabContents.
+  NOTREACHED();
+}
+
+gfx::Rect PrerenderRenderWidgetHostView::GetViewCocoaBounds() const {
+  return cocoa_view_bounds_;
+}
+
+gfx::Rect PrerenderRenderWidgetHostView::GetRootWindowRect() {
+  return root_window_rect_;
+}
+
+void PrerenderRenderWidgetHostView::SetActive(bool active) {
+  // This view can never be made visible.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::SetWindowVisibility(bool visible) {
+  // This view can never be made visible.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::WindowFrameChanged() {
+  // Since there's no frame, and nothing to notify |this| of its change, this
+  // will never get called.
+  NOTREACHED();
+}
+
+// Since plugins are not loaded until the prerendered page is displayed, none of
+// the following functions will be called.
+void PrerenderRenderWidgetHostView::PluginFocusChanged(bool focused,
+                                                       int plugin_id) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::StartPluginIme() {
+  NOTREACHED();
+}
+
+bool PrerenderRenderWidgetHostView::PostProcessEventForPluginIme(
+    const NativeWebKeyboardEvent& event) {
+  NOTREACHED();
+  return false;
+}
+
+gfx::PluginWindowHandle
+PrerenderRenderWidgetHostView::AllocateFakePluginWindowHandle(
+    bool opaque, bool root) {
+  NOTREACHED();
+  prerender_contents_->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+  return gfx::kNullPluginWindow;
+}
+
+void PrerenderRenderWidgetHostView::DestroyFakePluginWindowHandle(
+    gfx::PluginWindowHandle window) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::AcceleratedSurfaceSetIOSurface(
+    gfx::PluginWindowHandle window,
+    int32 width,
+    int32 height,
+    uint64 io_surface_identifier) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::AcceleratedSurfaceSetTransportDIB(
+    gfx::PluginWindowHandle window,
+    int32 width,
+    int32 height,
+    TransportDIB::Handle transport_dib) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::AcceleratedSurfaceBuffersSwapped(
+    gfx::PluginWindowHandle window,
+    uint64 surface_id,
+    int renderer_id,
+    int32 route_id,
+    int gpu_host_id,
+    uint64 swap_buffers_count) {
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::GpuRenderingStateDidChange() {
+  // This will not be called, since AcquireCompositingSurface returns a NULL
+  // window handle.
+  NOTREACHED();
+}
+#endif  // defined(OS_MACOSX)
+
+#if defined(TOOLKIT_USES_GTK)
+void PrerenderRenderWidgetHostView::CreatePluginContainer(
+    gfx::PluginWindowHandle id) {
+  // Since plugins are not loaded until the prerendered page is loaded, this
+  // should never be called.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::DestroyPluginContainer(
+    gfx::PluginWindowHandle id) {
+  // Since plugins are not loaded until the prerendered page is loaded, this
+  // should never be called.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::AcceleratedCompositingActivated(
+    bool activated) {
+  // This will not be called, since AcquireCompositingSurface returns a NULL
+  // window handle.
+  DCHECK(!activated);
+  if (activated)
+    prerender_contents_->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+}
+#endif  // defined(TOOLKIT_USES_GTK)
+
+#if defined(OS_WIN)
+void PrerenderRenderWidgetHostView::WillWmDestroy() {
+  // Will never be called for a view not in a TabContents.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::ShowCompositorHostWindow(bool show) {
+  // This will not be called, since AcquireCompositingSurface returns a NULL
+  // window handle.
+  DCHECK(!show);
+  if (show)
+    prerender_contents_->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+}
+#endif  // defined(OS_WIN)
+
+gfx::PluginWindowHandle
+PrerenderRenderWidgetHostView::AcquireCompositingSurface() {
+  // Cancel prerendering if try to use a compositing surface.
+  prerender_contents_->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+  return gfx::kNullPluginWindow;
+}
+
+void PrerenderRenderWidgetHostView::ReleaseCompositingSurface(
+    gfx::PluginWindowHandle surface) {
+  // This should not be called, since AcquireCompositingSurface returns a null
+  // window.
+  DCHECK_EQ(surface, gfx::kNullPluginWindow);
+}
+
+void PrerenderRenderWidgetHostView::SetVisuallyDeemphasized(
+    const SkColor* color, bool animate) {
+  // This will not be called until the RVH is swapped into a tab.
+  NOTREACHED();
+}
+
+void PrerenderRenderWidgetHostView::SetBackground(const SkBitmap& background) {
+  // This will not be called for HTTP RenderViews.
+  NOTREACHED();
+}
+
+bool PrerenderRenderWidgetHostView::ContainsNativeView(
+    gfx::NativeView native_view) const {
+  return false;
+}
+
+}  // namespace prerender