cros: allow aura window not considered activatable for pointer event

ui/wm/core/base_focus_rules.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 "ui/wm/core/base_focus_rules.h"
 
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/window.h"
 #include "ui/wm/core/window_modality_controller.h"
 #include "ui/wm/core/window_util.h"
 #include "ui/wm/public/activation_delegate.h"
 
 namespace wm {
 namespace {
 
 aura::Window* GetFocusedWindow(aura::Window* context) {
   aura::client::FocusClient* focus_client =
       aura::client::GetFocusClient(context);
-  return focus_client ? focus_client->GetFocusedWindow() : NULL;
+  return focus_client ? focus_client->GetFocusedWindow() : nullptr;
 }
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // BaseFocusRules, protected:
 
-BaseFocusRules::BaseFocusRules() {
-}
+BaseFocusRules::BaseFocusRules() = default;
 
-BaseFocusRules::~BaseFocusRules() {
-}
+BaseFocusRules::~BaseFocusRules() = default;
 
 bool BaseFocusRules::IsWindowConsideredVisibleForActivation(
     aura::Window* window) const {
   return window->IsVisible();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BaseFocusRules, FocusRules implementation:
 
 bool BaseFocusRules::IsToplevelWindow(aura::Window* window) const {
@@ skipping 29 matching lines @@
   // A window must be focusable to be activatable. We don't call
   // CanFocusWindow() from here because it will call back to us via
   // GetActivatableWindow().
   if (!window->CanFocus())
     return false;
 
   // The window cannot be blocked by a modal transient.
   return !GetModalTransient(window);
 }
 
-bool BaseFocusRules::CanFocusWindow(aura::Window* window) const {
+bool BaseFocusRules::CanFocusWindow(aura::Window* window,
+                                    const ui::Event* event) const {
   // It is possible to focus a NULL window, it is equivalent to clearing focus.
   if (!window)
     return true;
 
   // The focused window is always inside the active window, so windows that
   // aren't activatable can't contain the focused window.
   aura::Window* activatable = GetActivatableWindow(window);
   if (!activatable || !activatable->Contains(window))
     return false;
   return window->CanFocus();
 }
 
 aura::Window* BaseFocusRules::GetToplevelWindow(aura::Window* window) const {
   aura::Window* parent = window->parent();
   aura::Window* child = window;
   while (parent) {
     if (IsToplevelWindow(child))
       return child;
 
     parent = parent->parent();
     child = child->parent();
   }
-  return NULL;
+  return nullptr;
 }
 
 aura::Window* BaseFocusRules::GetActivatableWindow(aura::Window* window) const {
   aura::Window* parent = window->parent();
   aura::Window* child = window;
   while (parent) {
     if (CanActivateWindow(child))
       return child;
 
     // CanActivateWindow() above will return false if |child| is blocked by a
@@ skipping 11 matching lines @@
           GetModalTransient(wm::GetTransientParent(child));
       if (parent_modal_transient == child)
         return child;
 
       return GetActivatableWindow(wm::GetTransientParent(child));
     }
 
     parent = parent->parent();
     child = child->parent();
   }
-  return NULL;
+  return nullptr;
 }
 
 aura::Window* BaseFocusRules::GetFocusableWindow(aura::Window* window) const {
-  if (CanFocusWindow(window))
+  if (CanFocusWindow(window, nullptr))
     return window;
 
   // |window| may be in a hierarchy that is non-activatable, in which case we
   // need to cut over to the activatable hierarchy.
   aura::Window* activatable = GetActivatableWindow(window);
   if (!activatable) {
     // There may not be a related activatable hierarchy to cut over to, in which
     // case we try an unrelated one.
     aura::Window* toplevel = GetToplevelWindow(window);
     if (toplevel)
       activatable = GetNextActivatableWindow(toplevel);
     if (!activatable)
-      return NULL;
+      return nullptr;
   }
 
   if (!activatable->Contains(window)) {
     // If there's already a child window focused in the activatable hierarchy,
     // just use that (i.e. don't shift focus), otherwise we need to at least cut
     // over to the activatable hierarchy.
     aura::Window* focused = GetFocusedWindow(activatable);
     return activatable->Contains(focused) ? focused : activatable;
   }
 
-  while (window && !CanFocusWindow(window))
+  while (window && !CanFocusWindow(window, nullptr))
     window = window->parent();
   return window;
 }
 
 aura::Window* BaseFocusRules::GetNextActivatableWindow(
     aura::Window* ignore) const {
   DCHECK(ignore);
 
   // Can be called from the RootWindow's destruction, which has a NULL parent.
   if (!ignore->parent())
-    return NULL;
+    return nullptr;
 
   // In the basic scenarios handled by BasicFocusRules, the pool of activatable
   // windows is limited to the |ignore|'s siblings.
   const aura::Window::Windows& siblings = ignore->parent()->children();
   DCHECK(!siblings.empty());
 
   for (aura::Window::Windows::const_reverse_iterator rit = siblings.rbegin();
        rit != siblings.rend();
        ++rit) {
     aura::Window* cur = *rit;
     if (cur == ignore)
       continue;
     if (CanActivateWindow(cur))
       return cur;
   }
-  return NULL;
+  return nullptr;
 }
 
 }  // namespace wm