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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 "ui/aura/focus_manager.h"
#include "ui/aura/client/activation_client.h"
#include "ui/aura/client/focus_change_observer.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window_delegate.h"
namespace aura {
////////////////////////////////////////////////////////////////////////////////
// FocusManager, public:
FocusManager::FocusManager() : focused_window_(NULL) {
}
FocusManager::~FocusManager() {
}
////////////////////////////////////////////////////////////////////////////////
// FocusManager, client::FocusClient implementation:
void FocusManager::AddObserver(client::FocusChangeObserver* observer) {
observers_.AddObserver(observer);
}
void FocusManager::RemoveObserver(client::FocusChangeObserver* observer) {
observers_.RemoveObserver(observer);
}
void FocusManager::FocusWindow(Window* focused_window, const ui::Event* event) {
if (focused_window == focused_window_)
return;
if (focused_window && !focused_window->CanFocus())
return;
// The NULL-check of |focused_window| is essential here before asking the
// activation client, since it is valid to clear the focus by calling
// SetFocusedWindow() to NULL.
if (focused_window) {
RootWindow* root = focused_window->GetRootWindow();
DCHECK(root);
if (client::GetActivationClient(root) &&
!client::GetActivationClient(root)->OnWillFocusWindow(
focused_window, event)) {
return;
}
}
Window* old_focused_window = focused_window_;
focused_window_ = focused_window;
FOR_EACH_OBSERVER(client::FocusChangeObserver, observers_,
OnWindowFocused(focused_window, old_focused_window));
client::FocusChangeObserver* observer =
client::GetFocusChangeObserver(old_focused_window);
if (observer)
observer->OnWindowFocused(focused_window_, old_focused_window);
observer = client::GetFocusChangeObserver(focused_window_);
if (observer)
observer->OnWindowFocused(focused_window_, old_focused_window);
}
Window* FocusManager::GetFocusedWindow() {
return focused_window_;
}
void FocusManager::OnWindowHiddenInRootWindow(
aura::Window* window,
aura::RootWindow* root_window,
bool destroyed) {
Window* focused_window =
client::GetFocusClient(root_window)->GetFocusedWindow();
if (window->Contains(focused_window)) {
Window* focus_to = window->transient_parent();
if (focus_to) {
// Has to be removed from the transient parent before focusing,
// otherwise |window| will be focused again.
if (destroyed)
focus_to->RemoveTransientChild(window);
} else {
// If the invisible view has no visible transient window, focus to the
// topmost visible parent window.
focus_to = window->parent();
}
if (focus_to &&
(!focus_to->IsVisible() ||
!focus_to->CanFocus() ||
(client::GetActivationClient(root_window) &&
!client::GetActivationClient(root_window)->OnWillFocusWindow(
focus_to, NULL)))) {
focus_to = NULL;
}
client::GetFocusClient(root_window)->FocusWindow(focus_to, NULL);
}
}
} // namespace aura
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