chrome/browser/extensions/extension_uninstall_dialog.cc

   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/extension_uninstall_dialog.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/browser/chrome_notification_types.h"
  12 #include "chrome/browser/extensions/extension_util.h"
  13 #include "chrome/browser/extensions/image_loader.h"
  14 #include "chrome/browser/profiles/profile.h"
  15 #include "chrome/browser/ui/browser.h"
  16 #include "content/public/browser/notification_service.h"
  17 #include "content/public/browser/notification_source.h"
  18 #include "extensions/common/constants.h"
  19 #include "extensions/common/extension.h"
  20 #include "extensions/common/extension_icon_set.h"
  21 #include "extensions/common/extension_resource.h"
  22 #include "extensions/common/manifest_handlers/icons_handler.h"
  23 #include "grit/generated_resources.h"
  24 #include "grit/theme_resources.h"
  25 #include "ui/base/l10n/l10n_util.h"
  26 #include "ui/base/resource/resource_bundle.h"
  27 #include "ui/gfx/image/image.h"
  28 #include "ui/gfx/image/image_skia.h"
  29
  30 namespace {
  31
  32 // Returns pixel size under maximal scale factor for the icon whose device
  33 // independent size is |size_in_dip|
  34 int GetSizeForMaxScaleFactor(int size_in_dip) {
  35   float max_scale_factor_scale = gfx::ImageSkia::GetMaxSupportedScale();
  36
  37   return static_cast<int>(size_in_dip * max_scale_factor_scale);
  38 }
  39
  40 // Returns bitmap for the default icon with size equal to the default icon's
  41 // pixel size under maximal supported scale factor.
  42 SkBitmap GetDefaultIconBitmapForMaxScaleFactor(bool is_app) {
  43   const gfx::ImageSkia& image = is_app ?
  44       extensions::util::GetDefaultAppIcon() :
  45       extensions::util::GetDefaultExtensionIcon();
  46   return image.GetRepresentation(
  47       gfx::ImageSkia::GetMaxSupportedScale()).sk_bitmap();
  48 }
  49
  50 }  // namespace
  51
  52 // Size of extension icon in top left of dialog.
  53 static const int kIconSize = 69;
  54
  55 ExtensionUninstallDialog::ExtensionUninstallDialog(
  56     Profile* profile,
  57     Browser* browser,
  58     ExtensionUninstallDialog::Delegate* delegate)
  59     : profile_(profile),
  60       browser_(browser),
  61       delegate_(delegate),
  62       extension_(NULL),
  63       triggering_extension_(NULL),
  64       state_(kImageIsLoading),
  65       ui_loop_(base::MessageLoop::current()) {
  66   if (browser) {
  67     registrar_.Add(this,
  68                    chrome::NOTIFICATION_BROWSER_CLOSED,
  69                    content::Source<Browser>(browser));
  70   }
  71 }
  72
  73 ExtensionUninstallDialog::~ExtensionUninstallDialog() {
  74 }
  75
  76 void ExtensionUninstallDialog::ConfirmProgrammaticUninstall(
  77     const extensions::Extension* extension,
  78     const extensions::Extension* triggering_extension) {
  79   triggering_extension_ = triggering_extension;
  80   ConfirmUninstall(extension);
  81 }
  82
  83 void ExtensionUninstallDialog::ConfirmUninstall(
  84     const extensions::Extension* extension) {
  85   DCHECK(ui_loop_ == base::MessageLoop::current());
  86   extension_ = extension;
  87   // Bookmark apps may not have 128x128 icons so accept 48x48 icons.
  88   const int icon_size = extension_->from_bookmark()
  89       ? extension_misc::EXTENSION_ICON_MEDIUM
  90       : extension_misc::EXTENSION_ICON_LARGE;
  91   extensions::ExtensionResource image = extensions::IconsInfo::GetIconResource(
  92       extension_,
  93       icon_size,
  94       ExtensionIconSet::MATCH_BIGGER);
  95   // Load the icon whose pixel size is large enough to be displayed under
  96   // maximal supported scale factor. UI code will scale the icon down if needed.
  97   int pixel_size = GetSizeForMaxScaleFactor(kIconSize);
  98
  99   // Load the image asynchronously. The response will be sent to OnImageLoaded.
 100   state_ = kImageIsLoading;
 101   extensions::ImageLoader* loader =
 102       extensions::ImageLoader::Get(profile_);
 103   loader->LoadImageAsync(extension_, image,
 104                          gfx::Size(pixel_size, pixel_size),
 105                          base::Bind(&ExtensionUninstallDialog::OnImageLoaded,
 106                                     AsWeakPtr()));
 107 }
 108
 109 void ExtensionUninstallDialog::SetIcon(const gfx::Image& image) {
 110   if (image.IsEmpty()) {
 111     // Let's set default icon bitmap whose size is equal to the default icon's
 112     // pixel size under maximal supported scale factor. If the bitmap is larger
 113     // than the one we need, it will be scaled down by the ui code.
 114     // TODO(tbarzic): We should use IconImage here and load the required bitmap
 115     //     lazily.
 116     icon_ = gfx::ImageSkia::CreateFrom1xBitmap(
 117         GetDefaultIconBitmapForMaxScaleFactor(extension_->is_app()));
 118   } else {
 119     icon_ = *image.ToImageSkia();
 120   }
 121 }
 122
 123 void ExtensionUninstallDialog::OnImageLoaded(const gfx::Image& image) {
 124   SetIcon(image);
 125
 126   // Show the dialog unless the browser has been closed while we were waiting
 127   // for the image.
 128   DCHECK(state_ == kImageIsLoading || state_ == kBrowserIsClosing);
 129   if (state_ == kImageIsLoading) {
 130     state_ = kDialogIsShowing;
 131     Show();
 132   }
 133 }
 134
 135 void ExtensionUninstallDialog::Observe(
 136     int type,
 137     const content::NotificationSource& source,
 138     const content::NotificationDetails& details) {
 139   DCHECK(type == chrome::NOTIFICATION_BROWSER_CLOSED);
 140
 141   browser_ = NULL;
 142   // If the browser is closed while waiting for the image, we need to send a
 143   // "cancel" event here, because there will not be another opportunity to
 144   // notify the delegate of the cancellation as we won't open the dialog.
 145   if (state_ == kImageIsLoading) {
 146     state_ = kBrowserIsClosing;
 147     delegate_->ExtensionUninstallCanceled();
 148   }
 149 }
 150
 151 std::string ExtensionUninstallDialog::GetHeadingText() {
 152   if (triggering_extension_) {
 153     return l10n_util::GetStringFUTF8(
 154         IDS_EXTENSION_PROGRAMMATIC_UNINSTALL_PROMPT_HEADING,
 155         base::UTF8ToUTF16(triggering_extension_->name()),
 156         base::UTF8ToUTF16(extension_->name()));
 157   }
 158   return l10n_util::GetStringFUTF8(IDS_EXTENSION_UNINSTALL_PROMPT_HEADING,
 159                                    base::UTF8ToUTF16(extension_->name()));
 160 }