Implement overscroll support for the virtual keyboard.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 34 matching lines @@
 #include "media/base/video_util.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/cursor_client_observer.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/client/screen_position_client.h"
+#include "ui/aura/client/virtual_keyboard_client.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_observer.h"
 #include "ui/aura/window_tracker.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/ime/input_method.h"
@@ skipping 1643 matching lines @@
   gl_helper->WaitSyncPoint(frame->gl_frame_data->sync_point);
 
   BuffersSwapped(frame->gl_frame_data->size,
                  frame->gl_frame_data->sub_buffer_rect,
                  frame->metadata.device_scale_factor,
                  frame->gl_frame_data->mailbox,
                  frame->metadata.latency_info,
                  ack_callback);
 }
 
+float RenderWidgetHostViewAura::GetOverdrawBottomHeight() const {
+  float overdraw = 0.f;
+#if defined(OS_CHROMEOS)
+  gfx::Rect window_bounds = window_->GetBoundsInScreen();
+  gfx::Rect intersect = gfx::IntersectRects(window_bounds,
+                                            virtual_keyboard_bounds_);
+  if (intersect.height() > 0 && intersect.height() < window_bounds.height())
+    overdraw = intersect.height();
+#endif
+  return overdraw;
+}
+
 #if defined(OS_WIN)
 void RenderWidgetHostViewAura::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
   if (GetBrowserAccessibilityManager()) {
     GetBrowserAccessibilityManager()->ToBrowserAccessibilityManagerWin()
         ->set_parent_iaccessible(accessible_parent);
   }
 }
 
 gfx::NativeViewId RenderWidgetHostViewAura::GetParentForWindowlessPlugin()
@@ skipping 1370 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, aura::client::CursorClientObserver implementation:
 
 void RenderWidgetHostViewAura::OnCursorVisibilityChanged(bool is_visible) {
   NotifyRendererOfCursorVisibilityState(is_visible);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// RenderWidgetHostViewAura, aura::client::VirtualKeyboardObserver
+// implementation:
+
+void RenderWidgetHostViewAura::OnKeyboardBoundsChanging(
+    const gfx::Rect& new_bounds) {
+#if defined(OS_CHROMEOS)
+  aura::client::VirtualKeyboardClient *keyboard_client =
+      aura::client::GetVirtualKeyboardClient(window_->GetRootWindow());
+  if (!keyboard_client || !keyboard_client->IsOverscrollEnabled())
+    return;
+  if (virtual_keyboard_bounds_ != new_bounds) {
+    virtual_keyboard_bounds_ = new_bounds;
+    host_->WasResized();
+  }
+#endif
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, aura::client::FocusChangeObserver implementation:
 
 void RenderWidgetHostViewAura::OnWindowFocused(aura::Window* gained_focus,
                                                aura::Window* lost_focus) {
   DCHECK(window_ == gained_focus || window_ == lost_focus);
   if (window_ == gained_focus) {
     // We need to honor input bypass if the associated tab is does not want
     // input. This gives the current focused window a chance to be the text
     // input client and handle events.
     if (host_->ignore_input_events())
@@ skipping 395 matching lines @@
 void RenderWidgetHostViewAura::AddedToRootWindow() {
   window_->GetHost()->AddObserver(this);
   UpdateScreenInfo(window_);
 
   aura::client::CursorClient* cursor_client =
       aura::client::GetCursorClient(window_->GetRootWindow());
   if (cursor_client) {
     cursor_client->AddObserver(this);
     NotifyRendererOfCursorVisibilityState(cursor_client->IsCursorVisible());
   }
+
+  aura::client::VirtualKeyboardClient* keyboard_client =
+      aura::client::GetVirtualKeyboardClient(window_->GetRootWindow());
+  if (keyboard_client)
+    keyboard_client->AddObserver(this);
+
   if (current_surface_.get())
     UpdateExternalTexture();
   if (HasFocus()) {
     ui::InputMethod* input_method = GetInputMethod();
     if (input_method)
       input_method->SetFocusedTextInputClient(this);
   }
 
 #if defined(OS_WIN)
   // The parent may have changed here. Ensure that the legacy window is
@@ skipping 10 matching lines @@
     vsync_manager_->AddObserver(this);
   }
 }
 
 void RenderWidgetHostViewAura::RemovingFromRootWindow() {
   aura::client::CursorClient* cursor_client =
       aura::client::GetCursorClient(window_->GetRootWindow());
   if (cursor_client)
     cursor_client->RemoveObserver(this);
 
+  aura::client::VirtualKeyboardClient* keyboard_client =
+      aura::client::GetVirtualKeyboardClient(window_->GetRootWindow());
+  if (keyboard_client)
+    keyboard_client->RemoveObserver(this);
+
   DetachFromInputMethod();
 
   window_->GetHost()->RemoveObserver(this);
   ui::Compositor* compositor = GetCompositor();
   if (current_surface_.get()) {
     // We can't get notification for commits after this point, which would
     // guarantee that the compositor isn't using an old texture any more, so
     // instead we force the layer to stop using any external resources which
     // synchronizes with the compositor thread, and makes it safe to run the
     // callback.
@@ skipping 52 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content