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// Copyright 2013 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/accelerators/exit_warning_handler.h"
#include "ash/metrics/user_metrics_recorder.h"
#include "ash/shell.h"
#include "ash/shell_delegate.h"
#include "ash/shell_window_ids.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "grit/ash_strings.h"
#include "ui/aura/window.h"
#include "ui/base/accessibility/accessible_view_state.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font.h"
#include "ui/views/controls/label.h"
#include "ui/views/layout/fill_layout.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_delegate.h"
namespace ash {
namespace {
const int64 kTimeOutMilliseconds = 2000;
// Color of the text of the warning message.
const SkColor kTextColor = SK_ColorWHITE;
// Color of the window background.
const SkColor kWindowBackgroundColor = SkColorSetARGB(0xC0, 0x0, 0x0, 0x0);
// Radius of the rounded corners of the window.
const int kWindowCornerRadius = 2;
const int kHorizontalMarginAroundText = 100;
const int kVerticalMarginAroundText = 100;
class ExitWarningLabel : public views::Label {
public:
ExitWarningLabel() {}
virtual ~ExitWarningLabel() {}
private:
virtual void PaintText(gfx::Canvas* canvas,
const string16& text,
const gfx::Rect& text_bounds,
int flags) OVERRIDE {
// Turn off subpixel rendering.
views::Label::PaintText(canvas,
text,
text_bounds,
flags | gfx::Canvas::NO_SUBPIXEL_RENDERING);
}
DISALLOW_COPY_AND_ASSIGN(ExitWarningLabel);
};
class ExitWarningWidgetDelegateView : public views::WidgetDelegateView {
public:
ExitWarningWidgetDelegateView() : text_width_(0), width_(0), height_(0) {
text_ = l10n_util::GetStringUTF16(IDS_ASH_EXIT_WARNING_POPUP_TEXT);
accessible_name_ =
l10n_util::GetStringUTF16(IDS_ASH_EXIT_WARNING_POPUP_TEXT_ACCESSIBLE);
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
font_ = rb.GetFont(ui::ResourceBundle::LargeFont);
text_width_ = font_.GetStringWidth(text_);
width_ = text_width_ + kHorizontalMarginAroundText;
height_ = font_.GetHeight() + kVerticalMarginAroundText;
views::Label* label = new ExitWarningLabel;
label->SetText(text_);
label->SetHorizontalAlignment(gfx::ALIGN_CENTER);
label->SetFont(font_);
label->SetEnabledColor(kTextColor);
label->SetDisabledColor(kTextColor);
label->SetAutoColorReadabilityEnabled(false);
AddChildView(label);
SetLayoutManager(new views::FillLayout);
}
virtual gfx::Size GetPreferredSize() OVERRIDE {
return gfx::Size(width_, height_);
}
virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(kWindowBackgroundColor);
canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, paint);
views::WidgetDelegateView::OnPaint(canvas);
}
virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE {
state->name = accessible_name_;
state->role = ui::AccessibilityTypes::ROLE_ALERT;
}
private:
base::string16 text_;
base::string16 accessible_name_;
gfx::Font font_;
int text_width_;
int width_;
int height_;
DISALLOW_COPY_AND_ASSIGN(ExitWarningWidgetDelegateView);
};
} // namespace
ExitWarningHandler::ExitWarningHandler()
: state_(IDLE),
stub_timer_for_test_(false) {
}
ExitWarningHandler::~ExitWarningHandler() {
// Note: If a timer is outstanding, it is stopped in its destructor.
Hide();
}
void ExitWarningHandler::HandleAccelerator() {
ShellDelegate* shell_delegate = Shell::GetInstance()->delegate();
switch (state_) {
case IDLE:
state_ = WAIT_FOR_DOUBLE_PRESS;
Show();
StartTimer();
Shell::GetInstance()->
metrics()->RecordUserMetricsAction(UMA_ACCEL_EXIT_FIRST_Q);
break;
case WAIT_FOR_DOUBLE_PRESS:
state_ = EXITING;
CancelTimer();
Hide();
Shell::GetInstance()->
metrics()->RecordUserMetricsAction(UMA_ACCEL_EXIT_SECOND_Q);
shell_delegate->Exit();
break;
case EXITING:
break;
default:
NOTREACHED();
break;
}
}
void ExitWarningHandler::TimerAction() {
Hide();
if (state_ == WAIT_FOR_DOUBLE_PRESS)
state_ = IDLE;
}
void ExitWarningHandler::StartTimer() {
if (stub_timer_for_test_)
return;
timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(kTimeOutMilliseconds),
this,
&ExitWarningHandler::TimerAction);
}
void ExitWarningHandler::CancelTimer() {
timer_.Stop();
}
void ExitWarningHandler::Show() {
if (widget_)
return;
aura::Window* root_window = Shell::GetTargetRootWindow();
ExitWarningWidgetDelegateView* delegate = new ExitWarningWidgetDelegateView;
gfx::Size rs = root_window->bounds().size();
gfx::Size ps = delegate->GetPreferredSize();
gfx::Rect bounds((rs.width() - ps.width()) / 2,
(rs.height() - ps.height()) / 3,
ps.width(), ps.height());
views::Widget::InitParams params;
params.type = views::Widget::InitParams::TYPE_POPUP;
params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
params.accept_events = false;
params.can_activate = false;
params.keep_on_top = true;
params.remove_standard_frame = true;
params.delegate = delegate;
params.bounds = bounds;
params.parent = Shell::GetContainer(
root_window,
internal::kShellWindowId_SettingBubbleContainer);
widget_.reset(new views::Widget);
widget_->Init(params);
widget_->SetContentsView(delegate);
widget_->GetNativeView()->SetName("ExitWarningWindow");
widget_->Show();
delegate->NotifyAccessibilityEvent(ui::AccessibilityTypes::EVENT_ALERT, true);
}
void ExitWarningHandler::Hide() {
widget_.reset();
}
} // namespace ash
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