android_webview/browser/aw_browser_main_parts.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 "android_webview/browser/aw_browser_main_parts.h"
   6
   7 #include "android_webview/browser/aw_browser_context.h"
   8 #include "android_webview/browser/aw_result_codes.h"
   9 #include "android_webview/native/public/aw_assets.h"
  10 #include "base/android/build_info.h"
  11 #include "base/android/locale_utils.h"
  12 #include "base/android/memory_pressure_listener_android.h"
  13 #include "base/files/file_path.h"
  14 #include "base/path_service.h"
  15 #include "content/public/browser/render_process_host.h"
  16 #include "content/public/common/content_client.h"
  17 #include "content/public/common/content_switches.h"
  18 #include "content/public/common/result_codes.h"
  19 #include "content/public/common/url_utils.h"
  20 #include "net/android/network_change_notifier_factory_android.h"
  21 #include "net/base/network_change_notifier.h"
  22 #include "ui/base/l10n/l10n_util.h"
  23 #include "ui/base/layout.h"
  24 #include "ui/base/resource/resource_bundle.h"
  25 #include "ui/base/ui_base_paths.h"
  26
  27 namespace android_webview {
  28
  29 AwBrowserMainParts::AwBrowserMainParts(AwBrowserContext* browser_context)
  30     : browser_context_(browser_context) {
  31 }
  32
  33 AwBrowserMainParts::~AwBrowserMainParts() {
  34 }
  35
  36 void AwBrowserMainParts::PreEarlyInitialization() {
  37   net::NetworkChangeNotifier::SetFactory(
  38       new net::NetworkChangeNotifierFactoryAndroid());
  39
  40   // Android WebView does not use default MessageLoop. It has its own
  41   // Android specific MessageLoop. Also see MainMessageLoopRun.
  42   DCHECK(!main_message_loop_.get());
  43   main_message_loop_.reset(new base::MessageLoopForUI);
  44   base::MessageLoopForUI::current()->Start();
  45 }
  46
  47 int AwBrowserMainParts::PreCreateThreads() {
  48   int pak_fd = 0;
  49   int64 pak_off = 0;
  50   int64 pak_len = 0;
  51
  52   // TODO(primiano, mkosiba): GetApplicationLocale requires a ResourceBundle
  53   // instance to be present to work correctly so we call this (knowing it will
  54   // fail) just to create the ResourceBundle instance. We should refactor
  55   // ResourceBundle/GetApplicationLocale to not require an instance to be
  56   // initialized.
  57   ui::ResourceBundle::InitSharedInstanceWithLocale(
  58       base::android::GetDefaultLocale(),
  59       NULL,
  60       ui::ResourceBundle::DO_NOT_LOAD_COMMON_RESOURCES);
  61   std::string locale = l10n_util::GetApplicationLocale(std::string()) + ".pak";
  62   if (AwAssets::OpenAsset(locale, &pak_fd, &pak_off, &pak_len)) {
  63     ui::ResourceBundle::CleanupSharedInstance();
  64     ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(
  65         base::File(pak_fd), base::MemoryMappedFile::Region(pak_off, pak_len));
  66   } else {
  67     LOG(WARNING) << "Failed to load " << locale << ".pak from the apk too. "
  68                     "Bringing up WebView without any locale";
  69   }
  70
  71   // Try to directly mmap the webviewchromium.pak from the apk. Fall back to
  72   // load from file, using PATH_SERVICE, otherwise.
  73   if (AwAssets::OpenAsset("webviewchromium.pak", &pak_fd, &pak_off, &pak_len)) {
  74     ui::ResourceBundle::GetSharedInstance().AddDataPackFromFileRegion(
  75         base::File(pak_fd),
  76         base::MemoryMappedFile::Region(pak_off, pak_len),
  77         ui::SCALE_FACTOR_NONE);
  78   } else {
  79     base::FilePath pak_path;
  80     PathService::Get(ui::DIR_RESOURCE_PAKS_ANDROID, &pak_path);
  81     LOG(WARNING) << "Cannot load webviewchromium.pak assets from the apk. "
  82                     "Falling back loading it from " << pak_path.MaybeAsASCII();
  83     ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
  84         pak_path.AppendASCII("webviewchromium.pak"), ui::SCALE_FACTOR_NONE);
  85   }
  86
  87   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(
  88       base::android::AttachCurrentThread());
  89
  90   return content::RESULT_CODE_NORMAL_EXIT;
  91 }
  92
  93 void AwBrowserMainParts::PreMainMessageLoopRun() {
  94   browser_context_->PreMainMessageLoopRun();
  95   // This is needed for WebView Classic backwards compatibility
  96   // See crbug.com/298495
  97   content::SetMaxURLChars(20 * 1024 * 1024);
  98 }
  99
 100 bool AwBrowserMainParts::MainMessageLoopRun(int* result_code) {
 101   // Android WebView does not use default MessageLoop. It has its own
 102   // Android specific MessageLoop.
 103   return true;
 104 }
 105
 106 }  // namespace android_webview