1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/extensions/app_icon_loader_impl.h"
6
7#include "base/stl_util.h"
8#include "chrome/browser/extensions/extension_service.h"
9#include "chrome/browser/extensions/extension_util.h"
10#include "chrome/browser/profiles/profile.h"
11#include "chrome/common/extensions/extension_constants.h"
12#include "extensions/browser/extension_system.h"
13#include "extensions/common/extension.h"
14#include "extensions/common/manifest_handlers/icons_handler.h"
15#include "ui/gfx/color_utils.h"
16#include "ui/gfx/image/image_skia_operations.h"
17
18namespace {
19
20const extensions::Extension* GetExtensionByID(Profile* profile,
21                                              const std::string& id) {
22  ExtensionService* service =
23      extensions::ExtensionSystem::Get(profile)->extension_service();
24  if (!service)
25    return NULL;
26  return service->GetInstalledExtension(id);
27}
28
29}  // namespace
30
31namespace extensions {
32
33AppIconLoaderImpl::AppIconLoaderImpl(
34    Profile* profile,
35    int icon_size,
36    AppIconLoader::Delegate* delegate)
37    : profile_(profile),
38      delegate_(delegate),
39      icon_size_(icon_size) {
40
41}
42
43AppIconLoaderImpl::~AppIconLoaderImpl() {
44  STLDeleteContainerPairFirstPointers(map_.begin(), map_.end());
45}
46
47void AppIconLoaderImpl::FetchImage(const std::string& id) {
48  for (ImageToExtensionIDMap::const_iterator i = map_.begin();
49       i != map_.end(); ++i) {
50    if (i->second == id)
51      return;  // Already loading the image.
52  }
53
54  const extensions::Extension* extension = GetExtensionByID(profile_, id);
55  if (!extension)
56    return;
57
58  extensions::IconImage* image = new extensions::IconImage(
59      profile_,
60      extension,
61      extensions::IconsInfo::GetIcons(extension),
62      icon_size_,
63      extensions::util::GetDefaultAppIcon(),
64      this);
65  // |map_| takes ownership of |image|.
66  map_[image] = id;
67
68  // Triggers image loading now instead of depending on paint message. This
69  // makes the temp blank image be shown for shorter time and improves user
70  // experience. See http://crbug.com/146114.
71  image->image_skia().EnsureRepsForSupportedScales();
72}
73
74void AppIconLoaderImpl::ClearImage(const std::string& id) {
75  for (ImageToExtensionIDMap::iterator i = map_.begin();
76       i != map_.end(); ++i) {
77    if (i->second == id) {
78      delete i->first;
79      map_.erase(i);
80      break;
81    }
82  }
83}
84
85void AppIconLoaderImpl::UpdateImage(const std::string& id) {
86  for (ImageToExtensionIDMap::iterator i = map_.begin();
87       i != map_.end(); ++i) {
88    if (i->second == id) {
89      BuildImage(i->second, i->first->image_skia());
90      break;
91    }
92  }
93}
94
95void AppIconLoaderImpl::OnExtensionIconImageChanged(
96    extensions::IconImage* image) {
97  ImageToExtensionIDMap::iterator i = map_.find(image);
98  if (i == map_.end())
99    return;  // The image has been removed, do nothing.
100
101  BuildImage(i->second, i->first->image_skia());
102}
103
104void AppIconLoaderImpl::BuildImage(const std::string& id,
105                                   const gfx::ImageSkia& icon) {
106  gfx::ImageSkia image = icon;
107
108  if (!util::IsAppLaunchable(id, profile_)) {
109    const color_utils::HSL shift = {-1, 0, 0.6};
110    image = gfx::ImageSkiaOperations::CreateHSLShiftedImage(image, shift);
111  }
112
113  delegate_->SetAppImage(id, image);
114}
115
116}  // namespace extensions
117