Fix memory leak of Route newly created notifications to notification provider API

chrome/browser/notifications/notification_conversion_helper.cc

Index: chrome/browser/notifications/notification_conversion_helper.cc
diff --git a/chrome/browser/notifications/notification_conversion_helper.cc b/chrome/browser/notifications/notification_conversion_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..800adc11c620a685ea9f8a419625689ed5fe9a3e
--- /dev/null
+++ b/chrome/browser/notifications/notification_conversion_helper.cc
@@ -0,0 +1,213 @@
+// Copyright 2014 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/notifications/notification_conversion_helper.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/common/extensions/api/notification_provider.h"
+#include "chrome/common/extensions/api/notifications/notification_style.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_skia_rep.h"
+#include "ui/gfx/skia_util.h"
+
+void NotificationConversionHelper::NotificationToNotificationOptions(
+    const Notification& notification,
+    extensions::api::notifications::NotificationOptions* options) {
+  // Extract required fields: type, title, message, and icon.
+  std::string type = MapTypeToString(notification.type());
+  options->type = extensions::api::notifications::ParseTemplateType(type);
+
+  if (!notification.icon().IsEmpty()) {
+    scoped_ptr<extensions::api::notifications::NotificationBitmap> icon(
+        new extensions::api::notifications::NotificationBitmap());
+    GfxImageToNotificationBitmap(&notification.icon(), icon.get());
+    options->icon_bitmap = icon.Pass();
+  }
+
+  options->title.reset(
+      new std::string(base::UTF16ToUTF8(notification.title())));
+  options->message.reset(
+      new std::string(base::UTF16ToUTF8(notification.message())));
+
+  // Handle optional data provided.
+  const message_center::RichNotificationData* rich_data =
+      &notification.rich_notification_data();
+
+  if (!rich_data->small_image.IsEmpty()) {
+    scoped_ptr<extensions::api::notifications::NotificationBitmap> icon_mask(
+        new extensions::api::notifications::NotificationBitmap());
+    GfxImageToNotificationBitmap(&rich_data->small_image, icon_mask.get());
+    options->app_icon_mask_bitmap = icon_mask.Pass();
+  }
+
+  options->priority.reset(new int(rich_data->priority));
+
+  options->is_clickable.reset(new bool(rich_data->clickable));
+
+  options->event_time.reset(new double(rich_data->timestamp.ToDoubleT()));
+
+  if (!rich_data->context_message.empty())
+    options->context_message.reset(
+        new std::string(base::UTF16ToUTF8(rich_data->context_message)));
+
+  if (!rich_data->buttons.empty()) {
+    scoped_ptr<std::vector<
+        linked_ptr<extensions::api::notifications::NotificationButton> > >
+        button_list(new std::vector<
+            linked_ptr<extensions::api::notifications::NotificationButton> >);
+    for (size_t i = 0; i < rich_data->buttons.size(); i++) {
+      linked_ptr<extensions::api::notifications::NotificationButton> button(
+          new extensions::api::notifications::NotificationButton);
+      button->title = base::UTF16ToUTF8(rich_data->buttons[i].title);
+
+      if (!rich_data->buttons[i].icon.IsEmpty()) {
+        scoped_ptr<extensions::api::notifications::NotificationBitmap> icon(
+            new extensions::api::notifications::NotificationBitmap());
+        GfxImageToNotificationBitmap(&rich_data->buttons[i].icon, icon.get());
+        button->icon_bitmap = icon.Pass();
+      }
+      button_list->push_back(button);
+    }
+    options->buttons = button_list.Pass();
+  }
+
+  // Only image type notifications should have images.
+  if (type == "image" && !rich_data->image.IsEmpty()) {
+    scoped_ptr<extensions::api::notifications::NotificationBitmap> image(
+        new extensions::api::notifications::NotificationBitmap());
+    GfxImageToNotificationBitmap(&notification.image(), image.get());
+    options->image_bitmap = image.Pass();
+  } else if (type != "image" && !rich_data->image.IsEmpty()) {
+    DVLOG(1) << "Only image type notifications should have images.";
+  }
+
+  // Only progress type notifications should have progress bars.
+  if (type == "progress")
+    options->progress.reset(new int(rich_data->progress));
+  else if (rich_data->progress != 0)
+    DVLOG(1) << "Only progress type notifications should have progress.";
+
+  // Only list type notifications should have lists.
+  if (type == "list" && !rich_data->items.empty()) {
+    scoped_ptr<std::vector<
+        linked_ptr<extensions::api::notifications::NotificationItem> > >
+        list(new std::vector<
+            linked_ptr<extensions::api::notifications::NotificationItem> >);
+    for (size_t j = 0; j < rich_data->items.size(); j++) {
+      linked_ptr<extensions::api::notifications::NotificationItem> item(
+          new extensions::api::notifications::NotificationItem);
+      item->title = base::UTF16ToUTF8(rich_data->items[j].title);
+      item->message = base::UTF16ToUTF8(rich_data->items[j].message);
+      list->push_back(item);
+    }
+    options->items = list.Pass();
+  } else if (type != "list" && !rich_data->items.empty()) {
+    DVLOG(1) << "Only list type notifications should have lists.";
+  }
+}
+
+void NotificationConversionHelper::GfxImageToNotificationBitmap(
+    const gfx::Image* gfx_image,
+    extensions::api::notifications::NotificationBitmap* notification_bitmap) {
+  SkBitmap sk_bitmap = gfx_image->AsBitmap();
+  sk_bitmap.lockPixels();
+
+  notification_bitmap->width = sk_bitmap.width();
+  notification_bitmap->height = sk_bitmap.height();
+  int pixel_count = sk_bitmap.width() * sk_bitmap.height();
+  const int BYTES_PER_PIXEL = 4;
+
+  uint32_t* bitmap_pixels = sk_bitmap.getAddr32(0, 0);
+  const unsigned char* bitmap =
+      reinterpret_cast<const unsigned char*>(bitmap_pixels);
+  scoped_ptr<unsigned char[]> rgba_bitmap_data(
+      new unsigned char[pixel_count * BYTES_PER_PIXEL]);
+
+  gfx::ConvertSkiaToRGBA(bitmap, pixel_count, rgba_bitmap_data.get());
+  sk_bitmap.unlockPixels();
+
+  notification_bitmap->data.reset(new std::string(
+      rgba_bitmap_data.get(),
+      (rgba_bitmap_data.get() + pixel_count * BYTES_PER_PIXEL)));
+  return;
+}
+
+bool NotificationConversionHelper::NotificationBitmapToGfxImage(
+    float max_scale,
+    const gfx::Size& target_size_dips,
+    extensions::api::notifications::NotificationBitmap* notification_bitmap,
+    gfx::Image* return_image) {
+  if (!notification_bitmap)
+    return false;
+
+  const int max_device_pixel_width = target_size_dips.width() * max_scale;
+  const int max_device_pixel_height = target_size_dips.height() * max_scale;
+
+  const int BYTES_PER_PIXEL = 4;
+
+  const int width = notification_bitmap->width;
+  const int height = notification_bitmap->height;
+
+  if (width < 0 || height < 0 || width > max_device_pixel_width ||
+      height > max_device_pixel_height)
+    return false;
+
+  // Ensure we have rgba data.
+  std::string* rgba_data = notification_bitmap->data.get();
+  if (!rgba_data)
+    return false;
+
+  const size_t rgba_data_length = rgba_data->length();
+  const size_t rgba_area = width * height;
+
+  if (rgba_data_length != rgba_area * BYTES_PER_PIXEL)
+    return false;
+
+  SkBitmap bitmap;
+  // Allocate the actual backing store with the sanitized dimensions.
+  if (!bitmap.allocN32Pixels(width, height))
+    return false;
+
+  // Ensure that our bitmap and our data now refer to the same number of pixels.
+  if (rgba_data_length != bitmap.getSafeSize())
+    return false;
+
+  uint32_t* pixels = bitmap.getAddr32(0, 0);
+  const char* c_rgba_data = rgba_data->data();
+
+  for (size_t t = 0; t < rgba_area; ++t) {
+    // |c_rgba_data| is RGBA, pixels is ARGB.
+    size_t rgba_index = t * BYTES_PER_PIXEL;
+    pixels[t] =
+        SkPreMultiplyColor(((c_rgba_data[rgba_index + 3] & 0xFF) << 24) |
+                           ((c_rgba_data[rgba_index + 0] & 0xFF) << 16) |
+                           ((c_rgba_data[rgba_index + 1] & 0xFF) << 8) |
+                           ((c_rgba_data[rgba_index + 2] & 0xFF) << 0));
+  }
+
+  // TODO(dewittj): Handle HiDPI images with more than one scale factor
+  // representation.
+  gfx::ImageSkia skia(gfx::ImageSkiaRep(bitmap, 1.0f));
+  *return_image = gfx::Image(skia);
+  return true;
+}
+
+std::string NotificationConversionHelper::MapTypeToString(
+    message_center::NotificationType type) {
+  switch (type) {
+    case message_center::NOTIFICATION_TYPE_BASE_FORMAT:
+      return "basic";
+    case message_center::NOTIFICATION_TYPE_IMAGE:
+      return "image";
+    case message_center::NOTIFICATION_TYPE_MULTIPLE:
+      return "list";
+    case message_center::NOTIFICATION_TYPE_PROGRESS:
+      return "progress";
+    default:
+      NOTREACHED();
+      return "";
+  }
+}