Allow javascript change the virtual keyboard window size and position freely in FLOATING mode

ui/keyboard/keyboard_controller.cc

 // Copyright (c) 2013 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 "ui/keyboard/keyboard_controller.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 423 matching lines @@
     const ui::InputMethod* input_method) {
   DCHECK_EQ(input_method_, input_method);
   input_method_ = NULL;
 }
 
 void KeyboardController::OnShowImeIfNeeded() {
   ShowKeyboardInternal();
 }
 
 bool KeyboardController::ShouldEnableInsets(aura::Window* window) {
-  aura::Window *keyboard_window = proxy_->GetKeyboardWindow();
+  aura::Window* keyboard_window = proxy_->GetKeyboardWindow();
   return (keyboard_window->GetRootWindow() == window->GetRootWindow() &&
           keyboard::IsKeyboardOverscrollEnabled() &&
-          proxy_->GetKeyboardWindow()->IsVisible() &&
-          keyboard_visible_);
+          keyboard_window->IsVisible() && keyboard_visible_);
 }
 
 void KeyboardController::UpdateWindowInsets(aura::Window* window) {
-  aura::Window *keyboard_window = proxy_->GetKeyboardWindow();
+  aura::Window* keyboard_window = proxy_->GetKeyboardWindow();
   if (window == keyboard_window)
     return;
 
   scoped_ptr<content::RenderWidgetHostIterator> widgets(
       content::RenderWidgetHost::GetRenderWidgetHosts());
   while (content::RenderWidgetHost* widget = widgets->GetNextHost()) {
     content::RenderWidgetHostView* view = widget->GetView();
     if (view && window->Contains(view->GetNativeView())) {
       gfx::Rect window_bounds = view->GetNativeView()->GetBoundsInScreen();
-      gfx::Rect intersect = gfx::IntersectRects(window_bounds,
-          proxy_->GetKeyboardWindow()->bounds());
+      gfx::Rect intersect =
+          gfx::IntersectRects(window_bounds, keyboard_window->bounds());
       int overlap = ShouldEnableInsets(window) ? intersect.height() : 0;
       if (overlap > 0 && overlap < window_bounds.height())
         view->SetInsets(gfx::Insets(0, 0, overlap, 0));
       else
         view->SetInsets(gfx::Insets());
       return;
     }
   }
 }
 
+void KeyboardController::OnRootWindowResized(const gfx::Rect& bounds) {
+  // Keep the same height when window resize. It gets called when screen rotate.
+  if (!keyboard_container_initialized() || !proxy_->GetKeyboardWindow())
+    return;
+
+  int container_height = container_->bounds().height();
+  if (keyboard_mode_ == FULL_WIDTH) {
+    container_->SetBounds(gfx::Rect(bounds.x(),
+                                    bounds.bottom() - container_height,
+                                    bounds.width(), container_height));
+  } else if (keyboard_mode_ == FLOATING) {
+    // When screen rotate, horizontally center floating virtual keyboard window
+    // and vertically align it to the bottom.
+    int container_width = container_->bounds().width();
+    container_->SetBounds(gfx::Rect(
+        bounds.x() + (bounds.width() - container_width) / 2,
+        bounds.bottom() - container_height, container_width, container_height));
+  }
+}
+
 void KeyboardController::ShowKeyboardInternal() {
   if (!container_.get())
     return;
 
   if (container_->children().empty()) {
     keyboard::MarkKeyboardLoadStarted();
     aura::Window* keyboard = proxy_->GetKeyboardWindow();
     keyboard->Show();
     container_->AddChild(keyboard);
     keyboard->set_owned_by_parent(false);
@@ skipping 73 matching lines @@
   window_bounds_observer_->RemoveAllObservedWindows();
 }
 
 bool KeyboardController::WillHideKeyboard() const {
   return weak_factory_.HasWeakPtrs();
 }
 
 void KeyboardController::ShowAnimationFinished() {
   // Notify observers after animation finished to prevent reveal desktop
   // background during animation.
-  NotifyKeyboardBoundsChanging(proxy_->GetKeyboardWindow()->bounds());
+  NotifyKeyboardBoundsChanging(container_->bounds());
   proxy_->EnsureCaretInWorkArea();
 }
 
 void KeyboardController::HideAnimationFinished() {
   proxy_->HideKeyboardContainer(container_.get());
 }
 
 void KeyboardController::AddBoundsChangedObserver(aura::Window* window) {
   aura::Window* target_window = window ? window->GetToplevelWindow() : nullptr;
   if (target_window)
     window_bounds_observer_->AddObservedWindow(target_window);
 }
 
 }  // namespace keyboard