aura: Ask the WindowDelegate before a Window is Focus()ed.

. In aura, before a window is focused, ask the delegate if it can be focused.
. Make a popup RWHVA non-focusable.

This is to prevent the focus from moving from the main web-page to the combobox (which causes the combobox to get destroyed). This fixes an issue where comboboxes in the login screen could not be used properly.

BUG=105786
TEST=manually

Review URL: http://codereview.chromium.org/8770011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112909 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 10 insertions, 2 deletions

diff --git a/ui/aura/demo/demo_main.cc b/ui/aura/demo/demo_main.cc
index f8337ec..0795067 100644
--- a/ui/aura/demo/demo_main.cc
+++ b/ui/aura/demo/demo_main.cc
@@ -53,6 +53,7 @@ class DemoWindowDelegate : public aura::WindowDelegate {
   virtual ui::TouchStatus OnTouchEvent(aura::TouchEvent* event) OVERRIDE {
     return ui::TOUCH_STATUS_END;
   }
+  virtual bool CanFocus() OVERRIDE { return true; }
   virtual bool ShouldActivate(aura::Event* event) OVERRIDE { return true; }
   virtual void OnActivated() OVERRIDE {}
   virtual void OnLostActive() OVERRIDE {}
diff --git a/ui/aura/test/test_window_delegate.cc b/ui/aura/test/test_window_delegate.cc
index 4244879..4a4f778 100644
--- a/ui/aura/test/test_window_delegate.cc
+++ b/ui/aura/test/test_window_delegate.cc
@@ -56,6 +56,10 @@ ui::TouchStatus TestWindowDelegate::OnTouchEvent(TouchEvent* event) {
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
+bool TestWindowDelegate::CanFocus() {
+  return true;
+}
+
 bool TestWindowDelegate::ShouldActivate(Event* event) {
   return true;
 }
diff --git a/ui/aura/test/test_window_delegate.h b/ui/aura/test/test_window_delegate.h
index febe663..08f1d6f 100644
--- a/ui/aura/test/test_window_delegate.h
+++ b/ui/aura/test/test_window_delegate.h
@@ -30,6 +30,7 @@ class TestWindowDelegate : public WindowDelegate {
   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
   virtual bool OnMouseEvent(MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus OnTouchEvent(TouchEvent* event) OVERRIDE;
+  virtual bool CanFocus() OVERRIDE;
   virtual bool ShouldActivate(Event* event) OVERRIDE;
   virtual void OnActivated() OVERRIDE;
   virtual void OnLostActive() OVERRIDE;
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index d54a67e..c243997 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -368,8 +368,7 @@ bool Window::HasFocus() const {
 // propagation of events that would otherwise be targeted at windows behind it.
 // We then perform this same check on every window up to the root.
 bool Window::CanFocus() const {
-  // TODO(beng): Figure out how to consult the delegate wrt. focusability also.
-  if (!IsVisible() || !parent_)
+  if (!IsVisible() || !parent_ || (delegate_ && !delegate_->CanFocus()))
     return false;
 
   Windows::const_iterator i = std::find(parent_->children().begin(),
diff --git a/ui/aura/window_delegate.h b/ui/aura/window_delegate.h
index 034ad8e..f865511 100644
--- a/ui/aura/window_delegate.h
+++ b/ui/aura/window_delegate.h
@@ -52,6 +52,9 @@ class AURA_EXPORT WindowDelegate {
 
   virtual ui::TouchStatus OnTouchEvent(TouchEvent* event) = 0;
 
+  // Returns true of the window can be focused.
+  virtual bool CanFocus() = 0;
+
   // Returns true if the window should be activated. |event| is either the mouse
   // event supplied if the activation is the result of a mouse, or the touch
   // event if the activation is the result of a touch, or NULL if activation is