Animated Rotation

chrome/browser/ui/touch/frame/touch_browser_frame_view.cc

Index: chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
diff --git a/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc b/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
index 836983b6c439fc7c0d9fb3b6c060764cbda4f09e..fc5a758973457a4ff2099cc0c2f08fc017285b66 100644
--- a/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
+++ b/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
@@ -23,6 +23,8 @@
 #include "ui/base/animation/slide_animation.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/transform.h"
+#include "views/animation/screen_rotation_setter.h"
+#include "views/desktop/desktop_window_view.h"
 #include "views/controls/button/image_button.h"
 #include "views/controls/textfield/textfield.h"
 #include "views/focus/focus_manager.h"
@@ -47,6 +49,37 @@ bool TabContentsHasFocus(const TabContents* contents) {
   return view->Contains(view->GetFocusManager()->GetFocusedView());
 }
 
+ui::Transform SideToTransform(sensors::ScreenOrientation::Side side,
+                              const ui::Transform& old_transform,
+                              const gfx::Size& size) {
+  gfx::Point origin;
+  gfx::Point bottom_right(size.width(), size.height());
+  old_transform.TransformPoint(origin);
+  old_transform.TransformPoint(bottom_right);
+  int original_width = abs(origin.x() - bottom_right.x());
+  int original_height = abs(origin.y() - bottom_right.y());
+  ui::Transform to_return;
+  switch (side) {
+    case sensors::ScreenOrientation::TOP: break;
+    case sensors::ScreenOrientation::RIGHT:
+      to_return.ConcatRotate(90);
+      to_return.ConcatTranslate(original_width, 0);
+      break;
+    case sensors::ScreenOrientation::LEFT:
+      to_return.ConcatRotate(-90);
+      to_return.ConcatTranslate(0, original_height);
+      break;
+    case sensors::ScreenOrientation::BOTTOM:
+      to_return.ConcatRotate(180);
+      to_return.ConcatTranslate(original_width, original_height);
+      break;
+    default:
+      to_return = old_transform;
+      break;
+  }
+  return to_return;
+}
+
 }  // namespace
 
 // static
@@ -93,10 +126,13 @@ TouchBrowserFrameView::TouchBrowserFrameView(BrowserFrame* frame,
       chromeos::input_method::InputMethodManager::GetInstance();
   manager->AddVirtualKeyboardObserver(this);
 #endif
+
+  sensors::Provider::GetInstance()->AddListener(this);
 }
 
 TouchBrowserFrameView::~TouchBrowserFrameView() {
   browser_view()->browser()->tabstrip_model()->RemoveObserver(this);
+  sensors::Provider::GetInstance()->RemoveListener(this);
 }
 
 int TouchBrowserFrameView::NonClientHitTest(const gfx::Point& point) {
@@ -369,6 +405,27 @@ void TouchBrowserFrameView::AnimationEnded(const ui::Animation* animation) {
   SchedulePaint();
 }
 
+void TouchBrowserFrameView::OnScreenOrientationChanged(
+    const sensors::ScreenOrientation& change) {
+  views::View* to_rotate =
+      views::desktop::DesktopWindowView::desktop_window_view;
+
+  if (!to_rotate) {
+    views::Widget* widget = GetWidget();
+    to_rotate = widget->GetRootView();
+  }
+
+  if (!setter_) {
+    setter_ = new views::ScreenRotationSetter(to_rotate);
+    to_rotate->SetLayerPropertySetter(setter_);
+  }
+
+  ui::Transform xform = SideToTransform(change.upward,
+                                        to_rotate->GetTransform(),
+                                        to_rotate->size());
+  to_rotate->SetTransform(xform);
+}
+
 #if defined(OS_CHROMEOS)
 void TouchBrowserFrameView::VirtualKeyboardChanged(
     chromeos::input_method::InputMethodManager* manager,