Support notifications with custom content

ui/message_center/views/custom_notification_view.cc

+// Copyright 2016 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/message_center/views/custom_notification_view.h"
+
+#include <algorithm>
+
+#include "ui/gfx/geometry/size.h"
+#include "ui/message_center/message_center_style.h"
+#include "ui/views/background.h"
+#include "ui/views/controls/button/image_button.h"
+#include "ui/views/controls/image_view.h"
+
+namespace message_center {
+
+CustomNotificationView::CustomNotificationView(
+    MessageCenterController* controller,
+    const Notification& notification)
+    : MessageView(controller, notification) {
+  DCHECK_EQ(NOTIFICATION_TYPE_CUSTOM, notification.type());
+
+  contents_view_ = notification.delegate()->CreateCustomContent().release();
+  DCHECK(contents_view_);
+  AddChildView(contents_view_);
+
+  if (contents_view_->background()) {
+    background_view()->background()->SetNativeControlColor(
+        contents_view_->background()->get_color());
+  }
+
+  AddChildView(small_image());
+
+  CreateOrUpdateCloseButtonView(notification);
+
+  // Use a layer for close button so that custom content does not eclipse it.
+  if (close_button())
+    close_button()->SetPaintToLayer(true);
+}
+
+CustomNotificationView::~CustomNotificationView() {}
+
+void CustomNotificationView::SetDrawBackgroundAsActive(bool active) {
+  // Do nothing if |contents_view_| has a background.
+  if (contents_view_->background()) {

[yoshiki, 2016/05/16 03:31:09]

nit: no need for braces.

[xiyuan, 2016/05/16 16:15:37]

Done.

+    return;
+  }
+
+  MessageView::SetDrawBackgroundAsActive(active);
+}
+
+gfx::Size CustomNotificationView::GetPreferredSize() const {
+  const gfx::Insets insets = GetInsets();
+  const int contents_width = kNotificationWidth - insets.width();
+  const int contents_height = contents_view_->GetHeightForWidth(contents_width);
+
+  const int kMaxHeight = 240;
+  const int kMinHeight = 100;
+  return gfx::Size(
+      kNotificationWidth,
+      std::max(kMinHeight,
+               std::min(kMaxHeight, contents_height + insets.height())));
+}
+
+void CustomNotificationView::Layout() {
+  MessageView::Layout();
+
+  contents_view_->SetBoundsRect(GetContentsBounds());
+}
+
+}  // namespace message_center