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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/focus_cycler.h"
#include "ash/shell.h"
#include "ash/wm/window_cycle_controller.h"
#include "ui/aura/client/activation_client.h"
#include "ui/aura/window.h"
#include "ui/views/accessible_pane_view.h"
#include "ui/views/focus/focus_search.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace {
bool HasFocusableWindow() {
return !WindowCycleController::BuildWindowList(NULL, false).empty();
}
} // namespace
namespace internal {
FocusCycler::FocusCycler() : widget_activating_(NULL) {
}
FocusCycler::~FocusCycler() {
}
void FocusCycler::AddWidget(views::Widget* widget) {
widgets_.push_back(widget);
}
void FocusCycler::RotateFocus(Direction direction) {
const bool has_window = HasFocusableWindow();
int index = 0;
int count = static_cast<int>(widgets_.size());
int browser_index = has_window ? count : -1;
for (; index < count; ++index) {
if (widgets_[index]->IsActive())
break;
}
int start_index = index;
if (has_window)
++count;
for (;;) {
if (direction == FORWARD)
index = (index + 1) % count;
else
index = ((index - 1) + count) % count;
// Ensure that we don't loop more than once.
if (index == start_index)
break;
if (index == browser_index) {
// Activate the first window.
WindowCycleController::Direction window_direction =
direction == FORWARD ? WindowCycleController::FORWARD :
WindowCycleController::BACKWARD;
ash::Shell::GetInstance()->window_cycle_controller()->HandleCycleWindow(
window_direction, false);
break;
} else {
if (FocusWidget(widgets_[index]))
break;
}
}
}
bool FocusCycler::FocusWidget(views::Widget* widget) {
// Note: It is not necessary to set the focus directly to the pane since that
// will be taken care of by the widget activation.
widget_activating_ = widget;
widget->Activate();
widget_activating_ = NULL;
return widget->IsActive();
}
} // namespace internal
} // namespace ash
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