Fix focus loss on partial lock.

ash/wm/workspace/workspace_animations.cc

Index: ash/wm/workspace/workspace_animations.cc
diff --git a/ash/wm/workspace/workspace_animations.cc b/ash/wm/workspace/workspace_animations.cc
index 2bffbd57503ef29c359f9ecf3522f64f60bf86bc..5de57aa51410185f63fecea69f736f61e97e3831 100644
--- a/ash/wm/workspace/workspace_animations.cc
+++ b/ash/wm/workspace/workspace_animations.cc
@@ -5,6 +5,8 @@
 #include "ash/wm/workspace/workspace_animations.h"
 
 #include "ash/ash_switches.h"
+#include "base/bind.h"
+#include "base/callback.h"
 #include "base/command_line.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
@@ -49,6 +51,13 @@ base::TimeDelta DurationForWorkspaceShowOrHide(
       details.duration;
 }
 
+void HideWindow(aura::Window* window) {
+  ui::ScopedLayerAnimationSettings settings(window->layer()->GetAnimator());
+  settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
+  settings.SetTransitionDuration(base::TimeDelta());
+  window->Hide();
+}
+
 }  // namespace
 
 WorkspaceAnimationDetails::WorkspaceAnimationDetails()
@@ -140,14 +149,22 @@ void HideWorkspace(aura::Window* window,
     window->layer()->SetTransform(gfx::Transform());
   }
 
-  // NOTE: Hide() must be before SetOpacity(), else
-  // VisibilityController::UpdateLayerVisibility doesn't pass the false to the
-  // layer so that the layer and window end up out of sync and confused.
-  window->Hide();
+  window->layer()->SetVisible(false);

[Daniel Erat, 2012/11/27 19:03:27]

does this get balanced out by a call to SetVisible(true) if the animation is
aborted?

[sky, 2012/11/27 21:19:29]

I don't like that this leaves the workspace window thinking it's visible now.
Seems like we only want this logic for the lock screen. Could we pass in a
boolean indicating if we want this?

[Denis Kuznetsov (DE-MUC), 2012/11/28 15:41:46]

Animation is aborted only by other animation that animates visibility property
of the layer (Callback is created only for VISIBILITY property).

 
   if (details.animate_opacity)
     window->layer()->SetOpacity(0.0f);
 
+  // We need window-Hide() to be called to handle focus loss and other stuff
+  // correctly. However, this animation can be aborted in some cases
+  // (e.g. during lock), and window should only be hidden if animation
+  // completes.
+  base::Closure hide_window_callback = base::Bind(&HideWindow, window);
+  window->layer()->GetAnimator()->SetCompletionCallbackForProperties(
+      hide_window_callback,
+      ui::LayerAnimationElement::VISIBILITY,
+      -1
+  );

[Daniel Erat, 2012/11/27 19:03:27]

nit: move this to the end of the previous line

[Denis Kuznetsov (DE-MUC), 2012/11/28 15:41:46]

Done.

+
   // After the animation completes snap the transform back to the identity,
   // otherwise any one that asks for screen bounds gets a slightly scaled
   // version.