Refactor extension app icon.

chrome/browser/extensions/extension_app_icon_loader.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 "chrome/browser/extensions/extension_app_icon_loader.h"
-
-#include "base/stl_util.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_util.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/common/extensions/extension_constants.h"
-#include "extensions/browser/extension_system.h"
-#include "extensions/common/extension.h"
-#include "extensions/common/manifest_handlers/icons_handler.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/image/image_skia_operations.h"
-
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/extensions/gfx_utils.h"
-#endif
-
-namespace {
-
-const extensions::Extension* GetExtensionByID(Profile* profile,
-                                              const std::string& id) {
-  ExtensionService* service =
-      extensions::ExtensionSystem::Get(profile)->extension_service();
-  if (!service)
-    return nullptr;
-  return service->GetInstalledExtension(id);
-}
-
-}  // namespace
-
-namespace extensions {
-
-ExtensionAppIconLoader::ExtensionAppIconLoader(
-    Profile* profile,
-    int icon_size,
-    AppIconLoaderDelegate* delegate)
-    : AppIconLoader(profile, icon_size, delegate) {
-}
-
-ExtensionAppIconLoader::~ExtensionAppIconLoader() {
-}
-
-bool ExtensionAppIconLoader::CanLoadImageForApp(const std::string& id) {
-  if (map_.find(id) != map_.end())
-    return true;
-  return GetExtensionByID(profile(), id) != nullptr;
-}
-
-void ExtensionAppIconLoader::FetchImage(const std::string& id) {
-  if (map_.find(id) != map_.end())
-    return;  // Already loading the image.
-
-  const extensions::Extension* extension = GetExtensionByID(profile(), id);
-  if (!extension)
-    return;
-
-  std::unique_ptr<extensions::IconImage> image(new extensions::IconImage(
-      profile(), extension, extensions::IconsInfo::GetIcons(extension),
-      icon_size(), extensions::util::GetDefaultAppIcon(), this));
-
-  // Triggers image loading now instead of depending on paint message. This
-  // makes the temp blank image be shown for shorter time and improves user
-  // experience. See http://crbug.com/146114.
-  image->image_skia().EnsureRepsForSupportedScales();
-  map_[id] = std::move(image);
-}
-
-void ExtensionAppIconLoader::ClearImage(const std::string& id) {
-  map_.erase(id);
-}
-
-void ExtensionAppIconLoader::UpdateImage(const std::string& id) {
-  ExtensionIDToImageMap::iterator it = map_.find(id);
-  if (it == map_.end())
-    return;
-
-  BuildImage(it->first, it->second->image_skia());
-}
-
-void ExtensionAppIconLoader::OnExtensionIconImageChanged(
-    extensions::IconImage* image) {
-  for (const auto& pair : map_) {
-    if (pair.second.get() == image) {
-      BuildImage(pair.first, pair.second->image_skia());
-      return;
-    }
-  }
-  // The image has been removed, do nothing.
-}
-
-void ExtensionAppIconLoader::BuildImage(const std::string& id,
-                                        const gfx::ImageSkia& icon) {
-  gfx::ImageSkia image = icon;
-
-#if defined(OS_CHROMEOS)
-  util::MaybeApplyChromeBadge(profile(), id, &image);
-#endif
-
-  if (!util::IsAppLaunchable(id, profile())) {
-    const color_utils::HSL shift = {-1, 0, 0.6};
-    image = gfx::ImageSkiaOperations::CreateHSLShiftedImage(image, shift);
-  }
-
-  delegate()->OnAppImageUpdated(id, image);
-}
-
-}  // namespace extensions