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_dev_tools_discovery_provider.h"
   9 #include "android_webview/browser/aw_result_codes.h"
  10 #include "android_webview/native/public/aw_assets.h"
  11 #include "base/android/build_info.h"
  12 #include "base/android/locale_utils.h"
  13 #include "base/android/memory_pressure_listener_android.h"
  14 #include "base/files/file_path.h"
  15 #include "base/path_service.h"
  16 #include "components/devtools_discovery/devtools_discovery_manager.h"
  17 #include "content/public/browser/render_process_host.h"
  18 #include "content/public/common/content_client.h"
  19 #include "content/public/common/content_switches.h"
  20 #include "content/public/common/result_codes.h"
  21 #include "content/public/common/url_utils.h"
  22 #include "net/android/network_change_notifier_factory_android.h"
  23 #include "net/base/network_change_notifier.h"
  24 #include "ui/base/l10n/l10n_util.h"
  25 #include "ui/base/layout.h"
  26 #include "ui/base/resource/resource_bundle.h"
  27 #include "ui/base/ui_base_paths.h"
  28
  29 namespace android_webview {
  30
  31 AwBrowserMainParts::AwBrowserMainParts(AwBrowserContext* browser_context)
  32     : browser_context_(browser_context) {
  33 }
  34
  35 AwBrowserMainParts::~AwBrowserMainParts() {
  36 }
  37
  38 void AwBrowserMainParts::PreEarlyInitialization() {
  39   net::NetworkChangeNotifier::SetFactory(
  40       new net::NetworkChangeNotifierFactoryAndroid());
  41
  42   // Android WebView does not use default MessageLoop. It has its own
  43   // Android specific MessageLoop. Also see MainMessageLoopRun.
  44   DCHECK(!main_message_loop_.get());
  45   main_message_loop_.reset(new base::MessageLoopForUI);
  46   base::MessageLoopForUI::current()->Start();
  47 }
  48
  49 int AwBrowserMainParts::PreCreateThreads() {
  50   int pak_fd = 0;
  51   int64 pak_off = 0;
  52   int64 pak_len = 0;
  53
  54   // TODO(primiano, mkosiba): GetApplicationLocale requires a ResourceBundle
  55   // instance to be present to work correctly so we call this (knowing it will
  56   // fail) just to create the ResourceBundle instance. We should refactor
  57   // ResourceBundle/GetApplicationLocale to not require an instance to be
  58   // initialized.
  59   ui::ResourceBundle::InitSharedInstanceWithLocale(
  60       base::android::GetDefaultLocale(),
  61       NULL,
  62       ui::ResourceBundle::DO_NOT_LOAD_COMMON_RESOURCES);
  63   std::string locale = l10n_util::GetApplicationLocale(std::string()) + ".pak";
  64   if (AwAssets::OpenAsset(locale, &pak_fd, &pak_off, &pak_len)) {
  65     ui::ResourceBundle::CleanupSharedInstance();
  66     ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(
  67         base::File(pak_fd), base::MemoryMappedFile::Region(pak_off, pak_len));
  68   } else {
  69     LOG(WARNING) << "Failed to load " << locale << ".pak from the apk too. "
  70                     "Bringing up WebView without any locale";
  71   }
  72
  73   // Try to directly mmap the webviewchromium.pak from the apk. Fall back to
  74   // load from file, using PATH_SERVICE, otherwise.
  75   if (AwAssets::OpenAsset("webviewchromium.pak", &pak_fd, &pak_off, &pak_len)) {
  76     ui::ResourceBundle::GetSharedInstance().AddDataPackFromFileRegion(
  77         base::File(pak_fd),
  78         base::MemoryMappedFile::Region(pak_off, pak_len),
  79         ui::SCALE_FACTOR_NONE);
  80   } else {
  81     base::FilePath pak_path;
  82     PathService::Get(ui::DIR_RESOURCE_PAKS_ANDROID, &pak_path);
  83     LOG(WARNING) << "Cannot load webviewchromium.pak assets from the apk. "
  84                     "Falling back loading it from " << pak_path.MaybeAsASCII();
  85     ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
  86         pak_path.AppendASCII("webviewchromium.pak"), ui::SCALE_FACTOR_NONE);
  87   }
  88
  89   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(
  90       base::android::AttachCurrentThread());
  91
  92   return content::RESULT_CODE_NORMAL_EXIT;
  93 }
  94
  95 void AwBrowserMainParts::PreMainMessageLoopRun() {
  96   browser_context_->PreMainMessageLoopRun();
  97
  98   devtools_discovery::DevToolsDiscoveryManager* discovery_manager =
  99       devtools_discovery::DevToolsDiscoveryManager::GetInstance();
 100   discovery_manager->AddProvider(make_scoped_ptr(
 101       new AwDevToolsDiscoveryProvider()));
 102
 103   // This is needed for WebView Classic backwards compatibility
 104   // See crbug.com/298495
 105   content::SetMaxURLChars(20 * 1024 * 1024);
 106 }
 107
 108 bool AwBrowserMainParts::MainMessageLoopRun(int* result_code) {
 109   // Android WebView does not use default MessageLoop. It has its own
 110   // Android specific MessageLoop.
 111   return true;
 112 }
 113
 114 }  // namespace android_webview