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// 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/service/service_utility_process_host.h"
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
#include "base/scoped_temp_dir.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/utility_messages.h"
#include "ipc/ipc_switches.h"
#include "printing/page_range.h"
#include "ui/base/ui_base_switches.h"
#include "ui/gfx/rect.h"
#if defined(OS_WIN)
#include "base/scoped_ptr.h"
#include "base/win/scoped_handle.h"
#include "printing/emf_win.h"
#endif
ServiceUtilityProcessHost::ServiceUtilityProcessHost(
Client* client, base::MessageLoopProxy* client_message_loop_proxy)
: ServiceChildProcessHost(ChildProcessInfo::UTILITY_PROCESS),
client_(client),
client_message_loop_proxy_(client_message_loop_proxy),
waiting_for_reply_(false) {
}
ServiceUtilityProcessHost::~ServiceUtilityProcessHost() {
}
bool ServiceUtilityProcessHost::StartRenderPDFPagesToMetafile(
const FilePath& pdf_path,
const gfx::Rect& render_area,
int render_dpi,
const std::vector<printing::PageRange>& page_ranges) {
#if !defined(OS_WIN)
// This is only implemented on Windows (because currently it is only needed
// on Windows). Will add implementations on other platforms when needed.
NOTIMPLEMENTED();
return false;
#else // !defined(OS_WIN)
scratch_metafile_dir_.reset(new ScopedTempDir);
if (!scratch_metafile_dir_->CreateUniqueTempDir())
return false;
if (!file_util::CreateTemporaryFileInDir(scratch_metafile_dir_->path(),
&metafile_path_)) {
return false;
}
if (!StartProcess(false, scratch_metafile_dir_->path()))
return false;
base::win::ScopedHandle pdf_file(
::CreateFile(pdf_path.value().c_str(),
GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL));
if (pdf_file == INVALID_HANDLE_VALUE)
return false;
HANDLE pdf_file_in_utility_process = NULL;
::DuplicateHandle(::GetCurrentProcess(), pdf_file, handle(),
&pdf_file_in_utility_process, 0, false,
DUPLICATE_SAME_ACCESS);
if (!pdf_file_in_utility_process)
return false;
waiting_for_reply_ = true;
return Send(
new UtilityMsg_RenderPDFPagesToMetafile(pdf_file_in_utility_process,
metafile_path_,
render_area,
render_dpi,
page_ranges));
#endif // !defined(OS_WIN)
}
bool ServiceUtilityProcessHost::StartGetPrinterCapsAndDefaults(
const std::string& printer_name) {
FilePath exposed_path;
if (!StartProcess(true, exposed_path))
return false;
waiting_for_reply_ = true;
return Send(new UtilityMsg_GetPrinterCapsAndDefaults(printer_name));
}
bool ServiceUtilityProcessHost::StartProcess(bool no_sandbox,
const FilePath& exposed_dir) {
// Name must be set or metrics_service will crash in any test which
// launches a UtilityProcessHost.
set_name(L"utility process");
if (!CreateChannel())
return false;
FilePath exe_path = GetUtilityProcessCmd();
if (exe_path.empty()) {
NOTREACHED() << "Unable to get utility process binary name.";
return false;
}
CommandLine cmd_line(exe_path);
cmd_line.AppendSwitchASCII(switches::kProcessType, switches::kUtilityProcess);
cmd_line.AppendSwitchASCII(switches::kProcessChannelID, channel_id());
cmd_line.AppendSwitch(switches::kLang);
return Launch(&cmd_line, no_sandbox, exposed_dir);
}
FilePath ServiceUtilityProcessHost::GetUtilityProcessCmd() {
return GetChildPath(true);
}
bool ServiceUtilityProcessHost::CanShutdown() {
return true;
}
void ServiceUtilityProcessHost::OnChildDied() {
if (waiting_for_reply_) {
// If we are yet to receive a reply then notify the client that the
// child died.
client_message_loop_proxy_->PostTask(
FROM_HERE,
NewRunnableMethod(client_.get(), &Client::OnChildDied));
}
// The base class implementation will delete |this|.
ServiceChildProcessHost::OnChildDied();
}
bool ServiceUtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
bool msg_is_ok = false;
IPC_BEGIN_MESSAGE_MAP_EX(ServiceUtilityProcessHost, message, msg_is_ok)
#if defined(OS_WIN) // This hack is Windows-specific.
IPC_MESSAGE_HANDLER(UtilityHostMsg_PreCacheFont, OnPreCacheFont)
#endif
IPC_MESSAGE_HANDLER(UtilityHostMsg_RenderPDFPagesToMetafile_Succeeded,
OnRenderPDFPagesToMetafileSucceeded)
IPC_MESSAGE_UNHANDLED(msg_is_ok__ = MessageForClient(message))
IPC_END_MESSAGE_MAP_EX()
return true;
}
bool ServiceUtilityProcessHost::MessageForClient(const IPC::Message& message) {
DCHECK(waiting_for_reply_);
bool ret = client_message_loop_proxy_->PostTask(
FROM_HERE,
NewRunnableMethod(client_.get(), &Client::OnMessageReceived,
message));
waiting_for_reply_ = false;
return ret;
}
#if defined(OS_WIN) // This hack is Windows-specific.
void ServiceUtilityProcessHost::OnPreCacheFont(LOGFONT font) {
PreCacheFont(font);
}
#endif // OS_WIN
void ServiceUtilityProcessHost::OnRenderPDFPagesToMetafileSucceeded(
int highest_rendered_page_number) {
DCHECK(waiting_for_reply_);
// If the metafile was successfully created, we need to take our hands off the
// scratch metafile directory. The client will delete it when it is done with
// metafile.
scratch_metafile_dir_->Take();
client_message_loop_proxy_->PostTask(
FROM_HERE,
NewRunnableMethod(client_.get(),
&Client::MetafileAvailable,
metafile_path_,
highest_rendered_page_number));
waiting_for_reply_ = false;
}
bool ServiceUtilityProcessHost::Client::OnMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(ServiceUtilityProcessHost, message)
IPC_MESSAGE_HANDLER(UtilityHostMsg_RenderPDFPagesToMetafile_Failed,
Client::OnRenderPDFPagesToMetafileFailed)
IPC_MESSAGE_HANDLER(UtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded,
Client::OnGetPrinterCapsAndDefaultsSucceeded)
IPC_MESSAGE_HANDLER(UtilityHostMsg_GetPrinterCapsAndDefaults_Failed,
Client::OnGetPrinterCapsAndDefaultsFailed)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP_EX()
return handled;
}
void ServiceUtilityProcessHost::Client::MetafileAvailable(
const FilePath& metafile_path,
int highest_rendered_page_number) {
// The metafile was created in a temp folder which needs to get deleted after
// we have processed it.
ScopedTempDir scratch_metafile_dir;
if (!scratch_metafile_dir.Set(metafile_path.DirName()))
LOG(WARNING) << "Unable to set scratch metafile directory";
#if defined(OS_WIN)
// It's important that metafile is declared after scratch_metafile_dir so
// that the metafile destructor closes the file before the ScopedTempDir
// destructor tries to remove the directory.
printing::Emf metafile;
if (!metafile.InitFromFile(metafile_path)) {
OnRenderPDFPagesToMetafileFailed();
} else {
OnRenderPDFPagesToMetafileSucceeded(metafile,
highest_rendered_page_number);
}
#endif // defined(OS_WIN)
}
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