content/utility/utility_thread_impl.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 "content/utility/utility_thread_impl.h"
   6
   7 #include <stddef.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/files/file_path.h"
  11 #include "base/memory/scoped_vector.h"
  12 #include "content/child/child_process.h"
  13 #include "content/child/webkitplatformsupport_impl.h"
  14 #include "content/common/child_process_messages.h"
  15 #include "content/common/plugin_list.h"
  16 #include "content/common/utility_messages.h"
  17 #include "content/public/common/content_switches.h"
  18 #include "content/public/utility/content_utility_client.h"
  19 #include "ipc/ipc_sync_channel.h"
  20 #include "third_party/WebKit/public/web/WebKit.h"
  21
  22 #if defined(TOOLKIT_GTK)
  23 #include <gtk/gtk.h>
  24
  25 #include "ui/gfx/gtk_util.h"
  26 #endif
  27
  28 namespace content {
  29
  30 namespace {
  31
  32 template<typename SRC, typename DEST>
  33 void ConvertVector(const SRC& src, DEST* dest) {
  34   dest->reserve(src.size());
  35   for (typename SRC::const_iterator i = src.begin(); i != src.end(); ++i)
  36     dest->push_back(typename DEST::value_type(*i));
  37 }
  38
  39 }  // namespace
  40
  41 UtilityThreadImpl::UtilityThreadImpl() : single_process_(false) {
  42   Init();
  43 }
  44
  45 UtilityThreadImpl::UtilityThreadImpl(const std::string& channel_name)
  46     : ChildThread(channel_name),
  47       single_process_(true) {
  48   Init();
  49 }
  50
  51 UtilityThreadImpl::~UtilityThreadImpl() {
  52 }
  53
  54 void UtilityThreadImpl::Shutdown() {
  55   ChildThread::Shutdown();
  56
  57   if (!single_process_)
  58     WebKit::shutdown();
  59 }
  60
  61 bool UtilityThreadImpl::Send(IPC::Message* msg) {
  62   return ChildThread::Send(msg);
  63 }
  64
  65 void UtilityThreadImpl::ReleaseProcessIfNeeded() {
  66   if (batch_mode_)
  67     return;
  68
  69   if (single_process_) {
  70     // Close the channel to cause UtilityProcessHostImpl to be deleted. We need
  71     // to take a different code path than the multi-process case because that
  72     // depends on the child process going away to close the channel, but that
  73     // can't happen when we're in single process mode.
  74     channel()->Close();
  75   } else {
  76     ChildProcess::current()->ReleaseProcess();
  77   }
  78 }
  79
  80 #if defined(OS_WIN)
  81
  82 void UtilityThreadImpl::PreCacheFont(const LOGFONT& log_font) {
  83   Send(new ChildProcessHostMsg_PreCacheFont(log_font));
  84 }
  85
  86 void UtilityThreadImpl::ReleaseCachedFonts() {
  87   Send(new ChildProcessHostMsg_ReleaseCachedFonts());
  88 }
  89
  90 #endif  // OS_WIN
  91
  92 void UtilityThreadImpl::Init() {
  93   batch_mode_ = false;
  94   ChildProcess::current()->AddRefProcess();
  95   if (!single_process_) {
  96     // We can only initialize WebKit on one thread, and in single process mode
  97     // we run the utility thread on separate thread. This means that if any code
  98     // needs WebKit initialized in the utility process, they need to have
  99     // another path to support single process mode.
 100     webkit_platform_support_.reset(new WebKitPlatformSupportImpl);
 101     WebKit::initialize(webkit_platform_support_.get());
 102   }
 103   GetContentClient()->utility()->UtilityThreadStarted();
 104 }
 105
 106 bool UtilityThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
 107   if (GetContentClient()->utility()->OnMessageReceived(msg))
 108     return true;
 109
 110   bool handled = true;
 111   IPC_BEGIN_MESSAGE_MAP(UtilityThreadImpl, msg)
 112     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Started, OnBatchModeStarted)
 113     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Finished, OnBatchModeFinished)
 114 #if defined(OS_POSIX)
 115     IPC_MESSAGE_HANDLER(UtilityMsg_LoadPlugins, OnLoadPlugins)
 116 #endif  // OS_POSIX
 117     IPC_MESSAGE_UNHANDLED(handled = false)
 118   IPC_END_MESSAGE_MAP()
 119   return handled;
 120 }
 121
 122 void UtilityThreadImpl::OnBatchModeStarted() {
 123   batch_mode_ = true;
 124 }
 125
 126 void UtilityThreadImpl::OnBatchModeFinished() {
 127   ChildProcess::current()->ReleaseProcess();
 128 }
 129
 130 #if defined(OS_POSIX)
 131 void UtilityThreadImpl::OnLoadPlugins(
 132     const std::vector<base::FilePath>& plugin_paths) {
 133   PluginList* plugin_list = PluginList::Singleton();
 134
 135   // On Linux, some plugins expect the browser to have loaded glib/gtk. Do that
 136   // before attempting to call into the plugin.
 137   // g_thread_init API is deprecated since glib 2.31.0, please see release note:
 138   // http://mail.gnome.org/archives/gnome-announce-list/2011-October/msg00041.html
 139 #if defined(TOOLKIT_GTK)
 140 #if !(GLIB_CHECK_VERSION(2, 31, 0))
 141   if (!g_thread_get_initialized()) {
 142     g_thread_init(NULL);
 143   }
 144 #endif
 145   gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
 146 #endif
 147
 148   std::vector<WebPluginInfo> plugins;
 149   // TODO(bauerb): If we restart loading plug-ins, we might mess up the logic in
 150   // PluginList::ShouldLoadPlugin due to missing the previously loaded plug-ins
 151   // in |plugin_groups|.
 152   for (size_t i = 0; i < plugin_paths.size(); ++i) {
 153     WebPluginInfo plugin;
 154     if (!plugin_list->LoadPluginIntoPluginList(
 155         plugin_paths[i], &plugins, &plugin))
 156       Send(new UtilityHostMsg_LoadPluginFailed(i, plugin_paths[i]));
 157     else
 158       Send(new UtilityHostMsg_LoadedPlugin(i, plugin));
 159   }
 160
 161   ReleaseProcessIfNeeded();
 162 }
 163 #endif
 164
 165 }  // namespace content