Move UtilityProcessHost to content and move the message sending/dispatching to the clients. This...

chrome/utility/utility_thread.cc

Index: chrome/utility/utility_thread.cc
===================================================================
--- chrome/utility/utility_thread.cc	(revision 88135)
+++ chrome/utility/utility_thread.cc	(working copy)
@@ -1,388 +0,0 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/utility/utility_thread.h"
-
-#include <stddef.h>
-#include <vector>
-
-#include "base/base64.h"
-#include "base/file_path.h"
-#include "base/json/json_reader.h"
-#include "base/logging.h"
-#include "base/memory/ref_counted.h"
-#include "base/values.h"
-#include "build/build_config.h"
-#include "chrome/common/chrome_paths.h"
-#include "chrome/common/extensions/extension_unpacker.h"
-#include "chrome/common/extensions/update_manifest.h"
-#include "chrome/common/utility_messages.h"
-#include "chrome/common/web_resource/web_resource_unpacker.h"
-#include "content/common/child_process.h"
-#include "content/common/indexed_db_key.h"
-#include "content/common/serialized_script_value.h"
-#include "ipc/ipc_message_macros.h"
-#include "printing/backend/print_backend.h"
-#include "printing/page_range.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBKey.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebSerializedScriptValue.h"
-#include "ui/gfx/rect.h"
-#include "webkit/glue/idb_bindings.h"
-#include "webkit/glue/image_decoder.h"
-
-#if defined(OS_WIN)
-#include "app/win/iat_patch_function.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/path_service.h"
-#include "base/win/scoped_handle.h"
-#include "printing/emf_win.h"
-#endif
-
-namespace {
-
-template<typename SRC, typename DEST>
-void ConvertVector(const SRC& src, DEST* dest) {
-  dest->reserve(src.size());
-  for (typename SRC::const_iterator i = src.begin(); i != src.end(); ++i)
-    dest->push_back(typename DEST::value_type(*i));
-}
-
-}  // namespace
-
-
-UtilityThread::UtilityThread()
-    : batch_mode_(false) {
-  ChildProcess::current()->AddRefProcess();
-}
-
-UtilityThread::~UtilityThread() {
-}
-
-bool UtilityThread::OnControlMessageReceived(const IPC::Message& msg) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(UtilityThread, msg)
-    IPC_MESSAGE_HANDLER(UtilityMsg_UnpackExtension, OnUnpackExtension)
-    IPC_MESSAGE_HANDLER(UtilityMsg_UnpackWebResource, OnUnpackWebResource)
-    IPC_MESSAGE_HANDLER(UtilityMsg_ParseUpdateManifest, OnParseUpdateManifest)
-    IPC_MESSAGE_HANDLER(UtilityMsg_DecodeImage, OnDecodeImage)
-    IPC_MESSAGE_HANDLER(UtilityMsg_DecodeImageBase64, OnDecodeImageBase64)
-    IPC_MESSAGE_HANDLER(UtilityMsg_RenderPDFPagesToMetafile,
-                        OnRenderPDFPagesToMetafile)
-    IPC_MESSAGE_HANDLER(UtilityMsg_IDBKeysFromValuesAndKeyPath,
-                        OnIDBKeysFromValuesAndKeyPath)
-    IPC_MESSAGE_HANDLER(UtilityMsg_InjectIDBKey,
-                        OnInjectIDBKey)
-    IPC_MESSAGE_HANDLER(UtilityMsg_ParseJSON, OnParseJSON)
-    IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Started, OnBatchModeStarted)
-    IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Finished, OnBatchModeFinished)
-    IPC_MESSAGE_HANDLER(UtilityMsg_GetPrinterCapsAndDefaults,
-                        OnGetPrinterCapsAndDefaults)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void UtilityThread::OnUnpackExtension(const FilePath& extension_path) {
-  ExtensionUnpacker unpacker(extension_path);
-  if (unpacker.Run() && unpacker.DumpImagesToFile() &&
-      unpacker.DumpMessageCatalogsToFile()) {
-    Send(new UtilityHostMsg_UnpackExtension_Succeeded(
-       *unpacker.parsed_manifest()));
-  } else {
-    Send(new UtilityHostMsg_UnpackExtension_Failed(unpacker.error_message()));
-  }
-
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnUnpackWebResource(const std::string& resource_data) {
-  // Parse json data.
-  // TODO(mrc): Add the possibility of a template that controls parsing, and
-  // the ability to download and verify images.
-  WebResourceUnpacker unpacker(resource_data);
-  if (unpacker.Run()) {
-    Send(new UtilityHostMsg_UnpackWebResource_Succeeded(
-        *unpacker.parsed_json()));
-  } else {
-    Send(new UtilityHostMsg_UnpackWebResource_Failed(
-        unpacker.error_message()));
-  }
-
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnParseUpdateManifest(const std::string& xml) {
-  UpdateManifest manifest;
-  if (!manifest.Parse(xml)) {
-    Send(new UtilityHostMsg_ParseUpdateManifest_Failed(manifest.errors()));
-  } else {
-    Send(new UtilityHostMsg_ParseUpdateManifest_Succeeded(manifest.results()));
-  }
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnDecodeImage(
-    const std::vector<unsigned char>& encoded_data) {
-  webkit_glue::ImageDecoder decoder;
-  const SkBitmap& decoded_image = decoder.Decode(&encoded_data[0],
-                                                 encoded_data.size());
-  if (decoded_image.empty()) {
-    Send(new UtilityHostMsg_DecodeImage_Failed());
-  } else {
-    Send(new UtilityHostMsg_DecodeImage_Succeeded(decoded_image));
-  }
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnDecodeImageBase64(
-    const std::string& encoded_string) {
-  std::string decoded_string;
-
-  if (!base::Base64Decode(encoded_string, &decoded_string)) {
-    Send(new UtilityHostMsg_DecodeImage_Failed());
-    return;
-  }
-
-  std::vector<unsigned char> decoded_vector(decoded_string.size());
-  for (size_t i = 0; i < decoded_string.size(); ++i) {
-    decoded_vector[i] = static_cast<unsigned char>(decoded_string[i]);
-  }
-
-  OnDecodeImage(decoded_vector);
-}
-
-void UtilityThread::OnRenderPDFPagesToMetafile(
-    base::PlatformFile pdf_file,
-    const FilePath& metafile_path,
-    const gfx::Rect& render_area,
-    int render_dpi,
-    const std::vector<printing::PageRange>& page_ranges) {
-  bool succeeded = false;
-#if defined(OS_WIN)
-  int highest_rendered_page_number = 0;
-  succeeded = RenderPDFToWinMetafile(pdf_file,
-                                     metafile_path,
-                                     render_area,
-                                     render_dpi,
-                                     page_ranges,
-                                     &highest_rendered_page_number);
-  if (succeeded) {
-    Send(new UtilityHostMsg_RenderPDFPagesToMetafile_Succeeded(
-        highest_rendered_page_number));
-  }
-#endif  // defined(OS_WIN)
-  if (!succeeded) {
-    Send(new UtilityHostMsg_RenderPDFPagesToMetafile_Failed());
-  }
-  ReleaseProcessIfNeeded();
-}
-
-#if defined(OS_WIN)
-// Exported by pdf.dll
-typedef bool (*RenderPDFPageToDCProc)(
-    const unsigned char* pdf_buffer, int buffer_size, int page_number, HDC dc,
-    int dpi_x, int dpi_y, int bounds_origin_x, int bounds_origin_y,
-    int bounds_width, int bounds_height, bool fit_to_bounds,
-    bool stretch_to_bounds, bool keep_aspect_ratio, bool center_in_bounds);
-
-typedef bool (*GetPDFDocInfoProc)(const unsigned char* pdf_buffer,
-                                  int buffer_size, int* page_count,
-                                  double* max_page_width);
-
-// The 2 below IAT patch functions are almost identical to the code in
-// render_process_impl.cc. This is needed to work around specific Windows APIs
-// used by the Chrome PDF plugin that will fail in the sandbox.
-static app::win::IATPatchFunction g_iat_patch_createdca;
-HDC WINAPI UtilityProcess_CreateDCAPatch(LPCSTR driver_name,
-                                         LPCSTR device_name,
-                                         LPCSTR output,
-                                         const DEVMODEA* init_data) {
-  if (driver_name &&
-      (std::string("DISPLAY") == std::string(driver_name)))
-  // CreateDC fails behind the sandbox, but not CreateCompatibleDC.
-    return CreateCompatibleDC(NULL);
-
-  NOTREACHED();
-  return CreateDCA(driver_name, device_name, output, init_data);
-}
-
-static app::win::IATPatchFunction g_iat_patch_get_font_data;
-DWORD WINAPI UtilityProcess_GetFontDataPatch(
-    HDC hdc, DWORD table, DWORD offset, LPVOID buffer, DWORD length) {
-  int rv = GetFontData(hdc, table, offset, buffer, length);
-  if (rv == GDI_ERROR && hdc) {
-    HFONT font = static_cast<HFONT>(GetCurrentObject(hdc, OBJ_FONT));
-
-    LOGFONT logfont;
-    if (GetObject(font, sizeof(LOGFONT), &logfont)) {
-      std::vector<char> font_data;
-      if (UtilityThread::current()->Send(
-              new UtilityHostMsg_PreCacheFont(logfont)))
-        rv = GetFontData(hdc, table, offset, buffer, length);
-    }
-  }
-  return rv;
-}
-
-bool UtilityThread::RenderPDFToWinMetafile(
-    base::PlatformFile pdf_file,
-    const FilePath& metafile_path,
-    const gfx::Rect& render_area,
-    int render_dpi,
-    const std::vector<printing::PageRange>& page_ranges,
-    int* highest_rendered_page_number) {
-  *highest_rendered_page_number = -1;
-  base::win::ScopedHandle file(pdf_file);
-  FilePath pdf_module_path;
-  PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_module_path);
-  HMODULE pdf_module = GetModuleHandle(pdf_module_path.value().c_str());
-  if (!pdf_module)
-    return false;
-
-  RenderPDFPageToDCProc render_proc =
-      reinterpret_cast<RenderPDFPageToDCProc>(
-          GetProcAddress(pdf_module, "RenderPDFPageToDC"));
-  if (!render_proc)
-    return false;
-
-  GetPDFDocInfoProc get_info_proc = reinterpret_cast<GetPDFDocInfoProc>(
-          GetProcAddress(pdf_module, "GetPDFDocInfo"));
-  if (!get_info_proc)
-    return false;
-
-  // Patch the IAT for handling specific APIs known to fail in the sandbox.
-  if (!g_iat_patch_createdca.is_patched())
-    g_iat_patch_createdca.Patch(pdf_module_path.value().c_str(),
-                                "gdi32.dll", "CreateDCA",
-                                UtilityProcess_CreateDCAPatch);
-
-  if (!g_iat_patch_get_font_data.is_patched())
-    g_iat_patch_get_font_data.Patch(pdf_module_path.value().c_str(),
-                                    "gdi32.dll", "GetFontData",
-                                    UtilityProcess_GetFontDataPatch);
-
-  // TODO(sanjeevr): Add a method to the PDF DLL that takes in a file handle
-  // and a page range array. That way we don't need to read the entire PDF into
-  // memory.
-  DWORD length = ::GetFileSize(file, NULL);
-  if (length == INVALID_FILE_SIZE)
-    return false;
-
-  std::vector<uint8> buffer;
-  buffer.resize(length);
-  DWORD bytes_read = 0;
-  if (!ReadFile(pdf_file, &buffer.front(), length, &bytes_read, NULL) ||
-      (bytes_read != length))
-    return false;
-
-  int total_page_count = 0;
-  if (!get_info_proc(&buffer.front(), buffer.size(), &total_page_count, NULL))
-    return false;
-
-  printing::Emf metafile;
-  metafile.InitToFile(metafile_path);
-  // Since we created the metafile using the screen DPI (but we actually want
-  // the PDF DLL to print using the passed in render_dpi, we apply the following
-  // transformation.
-  SetGraphicsMode(metafile.context(), GM_ADVANCED);
-  XFORM xform = {0};
-  int screen_dpi = GetDeviceCaps(GetDC(NULL), LOGPIXELSX);
-  xform.eM11 = xform.eM22 =
-      static_cast<float>(screen_dpi) / static_cast<float>(render_dpi);
-  ModifyWorldTransform(metafile.context(), &xform, MWT_LEFTMULTIPLY);
-
-  bool ret = false;
-  std::vector<printing::PageRange>::const_iterator iter;
-  for (iter = page_ranges.begin(); iter != page_ranges.end(); ++iter) {
-    for (int page_number = iter->from; page_number <= iter->to; ++page_number) {
-      if (page_number >= total_page_count)
-        break;
-      // The underlying metafile is of type Emf and ignores the arguments passed
-      // to StartPage.
-      metafile.StartPage(gfx::Size(), gfx::Rect(), 1);
-      if (render_proc(&buffer.front(), buffer.size(), page_number,
-                      metafile.context(), render_dpi, render_dpi,
-                      render_area.x(), render_area.y(), render_area.width(),
-                      render_area.height(), true, false, true, true))
-        if (*highest_rendered_page_number < page_number)
-          *highest_rendered_page_number = page_number;
-        ret = true;
-      metafile.FinishPage();
-    }
-  }
-  metafile.FinishDocument();
-  return ret;
-}
-#endif  // defined(OS_WIN)
-
-void UtilityThread::OnIDBKeysFromValuesAndKeyPath(
-    int id,
-    const std::vector<SerializedScriptValue>& serialized_script_values,
-    const string16& idb_key_path) {
-  std::vector<WebKit::WebSerializedScriptValue> web_values;
-  ConvertVector(serialized_script_values, &web_values);
-  std::vector<WebKit::WebIDBKey> web_keys;
-  bool error = webkit_glue::IDBKeysFromValuesAndKeyPath(
-      web_values, idb_key_path, &web_keys);
-  if (error) {
-    Send(new UtilityHostMsg_IDBKeysFromValuesAndKeyPath_Failed(id));
-    return;
-  }
-  std::vector<IndexedDBKey> keys;
-  ConvertVector(web_keys, &keys);
-  Send(new UtilityHostMsg_IDBKeysFromValuesAndKeyPath_Succeeded(id, keys));
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnInjectIDBKey(const IndexedDBKey& key,
-                                   const SerializedScriptValue& value,
-                                   const string16& key_path) {
-  SerializedScriptValue new_value(webkit_glue::InjectIDBKey(key, value,
-                                                              key_path));
-  Send(new UtilityHostMsg_InjectIDBKey_Finished(new_value));
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnParseJSON(const std::string& json) {
-  int error_code;
-  std::string error;
-  Value* value =
-      base::JSONReader::ReadAndReturnError(json, false, &error_code, &error);
-  if (value) {
-    ListValue wrapper;
-    wrapper.Append(value);
-    Send(new UtilityHostMsg_ParseJSON_Succeeded(wrapper));
-  } else {
-    Send(new UtilityHostMsg_ParseJSON_Failed(error));
-  }
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::OnBatchModeStarted() {
-  batch_mode_ = true;
-}
-
-void UtilityThread::OnBatchModeFinished() {
-  ChildProcess::current()->ReleaseProcess();
-}
-
-void UtilityThread::OnGetPrinterCapsAndDefaults(
-    const std::string& printer_name) {
-  scoped_refptr<printing::PrintBackend> print_backend =
-      printing::PrintBackend::CreateInstance(NULL);
-  printing::PrinterCapsAndDefaults printer_info;
-  if (print_backend->GetPrinterCapsAndDefaults(printer_name, &printer_info)) {
-    Send(new UtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded(printer_name,
-                                                                printer_info));
-  } else {
-    Send(new UtilityHostMsg_GetPrinterCapsAndDefaults_Failed(printer_name));
-  }
-  ReleaseProcessIfNeeded();
-}
-
-void UtilityThread::ReleaseProcessIfNeeded() {
-  if (!batch_mode_)
-    ChildProcess::current()->ReleaseProcess();
-}