Unify and change logout/sleep/lock shortcuts

ash/accelerators/exit_warning_handler.cc

+// 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/shell.h"
+#include "ash/shell_delegate.h"
+#include "ash/shell_window_ids.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/time.h"
+#include "base/timer.h"
+#include "grit/ash_strings.h"
+#include "ui/aura/root_window.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 kDoublePressTimeOutMilliseconds = 300;
+const int64 kHoldTimeOutMilliseconds = 1700;
+const SkColor kForegroundColor = 0xFFFFFFFF;
+const SkColor kBackgroundColor = 0xE0808080;
+const int kHorizontalMarginAroundText = 100;
+const int kVerticalMarginAroundText = 100;
+
+class ExitWarningWidgetDelegateView : public views::WidgetDelegateView {
+ public:
+  ExitWarningWidgetDelegateView() : text_width_(0), width_(0), height_(0) {
+    text_ = l10n_util::GetStringUTF16(IDS_ASH_EXIT_WARNING_POPUP_TEXT);
+    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 views::Label;
+    label->SetText(text_);
+    label->SetHorizontalAlignment(gfx::ALIGN_CENTER);
+    label->SetFont(font_);
+    label->SetEnabledColor(kForegroundColor);
+    label->SetDisabledColor(kForegroundColor);
+    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 {
+    canvas->FillRect(GetLocalBounds(), kBackgroundColor);
+    views::WidgetDelegateView::OnPaint(canvas);
+  }
+
+ private:
+  base::string16 text_;
+  gfx::Font font_;
+  int text_width_;
+  int width_;
+  int height_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExitWarningWidgetDelegateView);
+};
+
+} // namespace
+
+ExitWarningHandler::ExitWarningHandler()
+  : state_(IDLE),
+    widget_(NULL),
+    stub_timers_for_test_(false) {
+}
+
+ExitWarningHandler::~ExitWarningHandler() {
+  // Note: If a timer is outstanding, it is stopped in its destructor.
+  Hide();
+}
+
+void ExitWarningHandler::HandleExitKey(bool press) {
+  switch (state_) {
+    case IDLE:
+      if (press) {
+        state_ = WAIT_FOR_QUICK_RELEASE;
+        Show();
+        StartTimers();
+      }
+      break;
+    case WAIT_FOR_QUICK_RELEASE:
+      if (!press)
+        state_ = WAIT_FOR_DOUBLE_PRESS;
+      break;
+    case WAIT_FOR_DOUBLE_PRESS:
+      if (press) {
+        state_ = EXITING;
+        CancelTimers();
+        Hide();
+        Shell::GetInstance()->delegate()->Exit();
+      }
+      break;
+    case WAIT_FOR_LONG_HOLD:
+      if (!press)
+        state_ = CANCELED;
+      break;
+    case CANCELED:
+    case EXITING:
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+}
+
+void ExitWarningHandler::Timer1Action() {
+  if (state_ == WAIT_FOR_QUICK_RELEASE)
+    state_ = WAIT_FOR_LONG_HOLD;
+  else if (state_ == WAIT_FOR_DOUBLE_PRESS)
+    state_ = CANCELED;
+}
+
+void ExitWarningHandler::Timer2Action() {
+  if (state_ == CANCELED) {
+    state_ = IDLE;
+    Hide();
+  }
+  else if (state_ == WAIT_FOR_LONG_HOLD) {
+    state_ = EXITING;
+    Hide();
+    Shell::GetInstance()->delegate()->Exit();
+  }
+}
+
+void ExitWarningHandler::StartTimers() {
+  if (stub_timers_for_test_)
+    return;
+  timer1_.Start(FROM_HERE,
+                base::TimeDelta::FromMilliseconds(
+                    kDoublePressTimeOutMilliseconds),
+                this,
+                &ExitWarningHandler::Timer1Action);
+  timer2_.Start(FROM_HERE,
+                base::TimeDelta::FromMilliseconds(kHoldTimeOutMilliseconds),
+                this,
+                &ExitWarningHandler::Timer2Action);
+}
+
+void ExitWarningHandler::CancelTimers() {
+  timer1_.Stop();
+  timer2_.Stop();
+}
+
+void ExitWarningHandler::Show() {
+  if (widget_)
+    return;
+  aura::RootWindow* root_window = Shell::GetActiveRootWindow();
+  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.transient = true;
+  params.transparent = true;
+  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_ = new views::Widget;
+  widget_->Init(params);
+  widget_->SetContentsView(delegate);
+  widget_->GetNativeView()->SetName("ExitWarningWindow");
+  widget_->Show();
+}
+
+void ExitWarningHandler::Hide() {
+  if (!widget_)
+    return;
+  widget_->Close();
+  widget_ = NULL;
+}
+
+}  // namespace ash