Message center re-organized

chrome/browser/ui/views/message_center/message_center_widget_delegate.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 "chrome/browser/ui/views/message_center/message_center_widget_delegate.h"
+
+#include <complex>
+
+#include "chrome/browser/ui/views/message_center/message_center_frame_view.h"
+#include "content/public/browser/user_metrics.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "ui/gfx/screen.h"
+#include "ui/message_center/message_center_style.h"
+#include "ui/message_center/message_center_util.h"
+#include "ui/message_center/views/message_center_view.h"
+#include "ui/native_theme/native_theme.h"
+#include "ui/views/border.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/widget/widget.h"
+
+#if defined(OS_WIN)
+#include "ui/views/win/hwnd_util.h"
+#endif
+
+namespace message_center {
+
+MessageCenterWidgetDelegate::MessageCenterWidgetDelegate(
+    WebNotificationTray* tray,
+    MessageCenterTray* mc_tray,
+    bool initially_settings_visible,
+    const PositionInfo& pos_info)
+    : MessageCenterView(tray->message_center(),
+                        mc_tray,
+                        pos_info.max_height,
+                        initially_settings_visible,
+                        pos_info.message_center_alignment &
+                            ALIGNMENT_TOP),  // Show buttons on top if message
+                                             // center is top aligned
+      pos_info_(pos_info),
+      tray_(tray) {
+  // A WidgetDelegate should be deleted on DeleteDelegate.
+  set_owned_by_client();
+
+  views::BoxLayout* layout =
+      new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0);
+  layout->set_spread_blank_space(true);
+  SetLayoutManager(layout);
+
+  AddAccelerator(ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE));
+
+  if (get_use_acceleration_when_possible()) {
+    SetPaintToLayer(true);
+    SetFillsBoundsOpaquely(true);
+  }
+
+  InitWidget();
+}
+
+MessageCenterWidgetDelegate::~MessageCenterWidgetDelegate() {
+  views::Widget* widget = GetWidget();
+  if (widget) {
+    widget->RemoveObserver(this);
+  }
+}
+
+views::View* MessageCenterWidgetDelegate::GetContentsView() {
+  return this;
+}
+
+views::NonClientFrameView*
+MessageCenterWidgetDelegate::CreateNonClientFrameView(views::Widget* widget) {
+  MessageCenterFrameView* frame_view = new MessageCenterFrameView();
+  border_insets_ = frame_view->GetInsets();
+  return frame_view;
+}
+
+void MessageCenterWidgetDelegate::DeleteDelegate() {
+  delete this;
+}
+
+views::Widget* MessageCenterWidgetDelegate::GetWidget() {
+  return View::GetWidget();
+}
+
+const views::Widget* MessageCenterWidgetDelegate::GetWidget() const {
+  return View::GetWidget();
+}
+
+void MessageCenterWidgetDelegate::OnWidgetActivationChanged(
+    views::Widget* widget,
+    bool active) {
+  if (!active) {
+    tray_->SendHideMessageCenter();
+  }
+}
+
+void MessageCenterWidgetDelegate::OnWidgetClosing(views::Widget* widget) {
+  tray_->MarkMessageCenterHidden();
+}
+
+void MessageCenterWidgetDelegate::PreferredSizeChanged() {
+  GetWidget()->SetBounds(GetMessageCenterBounds());
+  views::View::PreferredSizeChanged();
+}
+
+gfx::Size MessageCenterWidgetDelegate::GetPreferredSize() {
+  int preferred_width = kNotificationWidth + 2 * kMarginBetweenItems;
+  return gfx::Size(preferred_width, GetHeightForWidth(preferred_width));
+}
+
+gfx::Size MessageCenterWidgetDelegate::GetMaximumSize() {
+  gfx::Size size = GetPreferredSize();
+  return size;
+}
+
+int MessageCenterWidgetDelegate::GetHeightForWidth(int width) {
+  int height = MessageCenterView::GetHeightForWidth(width);
+  return (pos_info_.max_height != 0) ? std::min(height, pos_info_.max_height)
+                                     : height;
+}
+
+bool MessageCenterWidgetDelegate::AcceleratorPressed(
+    const ui::Accelerator& accelerator) {
+  if (accelerator.key_code() != ui::VKEY_ESCAPE)
+    return false;
+  tray_->SendHideMessageCenter();
+  return true;
+}
+
+void MessageCenterWidgetDelegate::InitWidget() {
+  views::Widget* widget = new views::Widget();
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_BUBBLE);
+  params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
+  params.delegate = this;
+  params.keep_on_top = true;
+  params.top_level = true;
+  widget->Init(params);
+
+#if defined(OS_WIN)
+  // Remove the Message Center from taskbar and alt-tab rotation.
+  HWND hwnd = views::HWNDForWidget(widget);
+  LONG_PTR ex_styles = ::GetWindowLongPtr(hwnd, GWL_EXSTYLE);
+  ex_styles |= WS_EX_TOOLWINDOW;
+  ::SetWindowLongPtr(hwnd, GWL_EXSTYLE, ex_styles);
+#endif
+
+  widget->AddObserver(this);
+  widget->StackAtTop();
+  widget->SetAlwaysOnTop(true);
+
+  const NotificationList::Notifications& notifications =
+      tray_->message_center()->GetNotifications();
+  SetNotifications(notifications);
+
+  widget->SetBounds(GetMessageCenterBounds());
+  widget->Show();
+  widget->Activate();
+}
+
+gfx::Point MessageCenterWidgetDelegate::GetCorrectedAnchor(
+    gfx::Size calculated_size) {
+  gfx::Point corrected_anchor = pos_info_.inital_anchor_point;
+
+  // Inset the width slightly so that the click point is not exactly on the edge
+  // of the message center but somewhere within the middle 60 %.
+  int insetted_width = (calculated_size.width() * 4) / 5;
+
+  if (pos_info_.taskbar_alignment == ALIGNMENT_TOP ||
+      pos_info_.taskbar_alignment == ALIGNMENT_BOTTOM) {
+    int click_point_x = tray_->mouse_click_point().x();
+
+    if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT) {
+      int opposite_x_corner =
+          pos_info_.inital_anchor_point.x() - insetted_width;
+
+      // If the click point is outside the x axis length of the message center,
+      // push the message center towards the left to align with the click point.
+      if (opposite_x_corner > click_point_x)
+        corrected_anchor.set_x(pos_info_.inital_anchor_point.x() -
+                               (opposite_x_corner - click_point_x));
+    } else {
+      int opposite_x_corner =
+          pos_info_.inital_anchor_point.x() + insetted_width;
+
+      if (opposite_x_corner < click_point_x)
+        corrected_anchor.set_x(pos_info_.inital_anchor_point.x() +
+                               (click_point_x - opposite_x_corner));
+    }
+  } else if (pos_info_.taskbar_alignment == ALIGNMENT_LEFT ||
+             pos_info_.taskbar_alignment == ALIGNMENT_RIGHT) {
+    int click_point_y = tray_->mouse_click_point().y();
+
+    if (pos_info_.message_center_alignment & ALIGNMENT_BOTTOM) {
+      int opposite_y_corner =
+          pos_info_.inital_anchor_point.y() - insetted_width;
+
+      // If the click point is outside the y axis length of the message center,
+      // push the message center upwards to align with the click point.
+      if (opposite_y_corner > click_point_y)
+        corrected_anchor.set_y(pos_info_.inital_anchor_point.y() -
+                               (opposite_y_corner - click_point_y));
+    } else {
+      int opposite_y_corner =
+          pos_info_.inital_anchor_point.y() + insetted_width;
+
+      if (opposite_y_corner < click_point_y)
+        corrected_anchor.set_y(pos_info_.inital_anchor_point.y() +
+                               (click_point_y - opposite_y_corner));
+    }
+  }
+  return corrected_anchor;
+}
+
+gfx::Rect MessageCenterWidgetDelegate::GetMessageCenterBounds() {
+  gfx::Size size = GetPreferredSize();
+
+  // Make space for borders on sides.
+  size.Enlarge(border_insets_.width(), border_insets_.height());
+  gfx::Rect bounds(size);
+
+  gfx::Point corrected_anchor = GetCorrectedAnchor(size);
+
+  if (pos_info_.message_center_alignment & ALIGNMENT_TOP)
+    bounds.set_y(corrected_anchor.y());
+  if (pos_info_.message_center_alignment & ALIGNMENT_BOTTOM)
+    bounds.set_y(corrected_anchor.y() - size.height());
+  if (pos_info_.message_center_alignment & ALIGNMENT_LEFT)
+    bounds.set_x(corrected_anchor.x());
+  if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT)
+    bounds.set_x(corrected_anchor.x() - size.width());
+
+  return bounds;
+}
+
+}  // namespace message_center