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();

[cbentzel, 2011/04/19 17:42:41]

Should this be done inside of SetBounds?

[mmenke, 2011/04/19 20:00:01]

We need the original view to do get those bounds, and I don't think it's worth
the effort to keep track of it.

I don't believe SetBounds() will be called at any other time, but I'm not
completely positive of that.  I suppose we could just ignore SetBounds() and do
everything here, if we really wanted.

I'm not completely sure of just when these bounds are used, either.  The code
mentions popups, but not sure if there more general uses.  One of many things I
want to look into (Including the Windows/Linux equivalents of these, which I
believe are calculated from the native view, so they won't work).

I'll go ahead and file a bug for looking into these issues.

+  root_window_rect_ = view->GetRootWindowRect();
+#endif  // defined(OS_MACOSX)
+  SetBounds(view->GetViewBounds());
+
+  // PrerenderRenderWidgetHostViews are always hidden.  This has reduces the

[cbentzel, 2011/04/19 17:42:41]

nit: This reduces the

[mmenke, 2011/04/19 20:00:01]

Fixed.

+  // 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() {

[cbentzel, 2011/04/19 17:42:41]

What happens if a prerender is triggered while Chrome is in full screen mode?

[mmenke, 2011/04/19 20:00:01]

It seems to work fine.  There's no is_fullscreen() function to cause issues -
just need the right bounds, which we have.

+  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();

[cbentzel, 2011/04/19 17:42:41]

Why is this NOTREACHED() with stuff below it? Where is this called?

[mmenke, 2011/04/19 20:00:01]

On at least some platforms, compositing calls in to this.  This won't be called
in that particular case, as the compositing functions are also part of RWHV;
however, I could see a future where something else, other than plugins, does so
as well (And does so directly).  I'd rather not break if that happens for the
first time in a release build.

I could just get rid of the NOTREACHED, but I think it would be best if we
noticed if anything new doesn't work with prerendering.

+  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