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// 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 "ash/wm/ash_activation_controller.h"
#include "ash/launcher/launcher.h"
#include "ash/root_window_controller.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/shell_delegate.h"
#include "ash/wm/activation_controller.h"
#include "ash/wm/property_util.h"
#include "ash/wm/window_util.h"
#include "ash/wm/workspace_controller.h"
#include "ui/views/corewm/window_modality_controller.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// AshActivationController, public:
AshActivationController::AshActivationController() {
}
AshActivationController::~AshActivationController() {
}
////////////////////////////////////////////////////////////////////////////////
// AshActivationController, ActivationControllerDelegate implementation:
aura::Window* AshActivationController::WillActivateWindow(
aura::Window* window) {
aura::Window* window_modal_transient =
views::corewm::GetModalTransient(window);
if (window_modal_transient)
return window_modal_transient;
// Fallback to launcher
if (!window)
window = PrepareToActivateLauncher();
// Restore minimized window. This needs to be done before CanReceiveEvents()
// is called as that function checks window visibility.
if (window && wm::IsWindowMinimized(window))
window->Show();
// If the screen is locked, just bring the window to top so that
// it will be activated when the lock window is destroyed.
// TODO(beng): Call EventClient directly here, rather than conflating with
// window visibility.
if (window && !window->CanReceiveEvents())
return NULL;
// TODO(beng): could probably move to being a ActivationChangeObserver on
// Shell.
if (window) {
DCHECK(window->GetRootWindow());
Shell::GetInstance()->set_active_root_window(window->GetRootWindow());
}
return window;
}
aura::Window* AshActivationController::WillFocusWindow(
aura::Window* window) {
aura::Window* window_modal_transient =
views::corewm::GetModalTransient(window);
if (window_modal_transient)
return window_modal_transient;
return window;
}
aura::Window* AshActivationController::PrepareToActivateLauncher() {
// If workspace controller is not available, then it means that the root
// window is being destroyed. We can't activate any window then.
if (!GetRootWindowController(
Shell::GetActiveRootWindow())->workspace_controller()) {
return NULL;
}
// Fallback to a launcher only when Spoken feedback is enabled.
if (!Shell::GetInstance()->delegate()->IsSpokenFeedbackEnabled())
return NULL;
ShelfWidget* shelf = GetRootWindowController(
Shell::GetActiveRootWindow())->shelf();
// Launcher's window may be already destroyed in shutting down process.
if (!shelf)
return NULL;
// Notify launcher to allow activation via CanActivate().
shelf->WillActivateAsFallback();
return shelf->GetNativeWindow();
}
} // namespace internal
} // namespace ash
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