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// Copyright 2014 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/browser/chrome_select_file_dialog_factory_win.h"
#include <Windows.h>
#include <commdlg.h>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/field_trial.h"
#include "base/strings/string16.h"
#include "base/synchronization/waitable_event.h"
#include "base/win/metro.h"
#include "chrome/common/chrome_utility_messages.h"
#include "content/public/browser/utility_process_host.h"
#include "content/public/browser/utility_process_host_client.h"
#include "ipc/ipc_message_macros.h"
#include "ui/base/win/open_file_name_win.h"
#include "ui/shell_dialogs/select_file_dialog_win.h"
namespace {
// Receives the GetOpenFileName result from the utility process.
class GetOpenFileNameClient : public content::UtilityProcessHostClient {
public:
GetOpenFileNameClient();
// Blocks until the GetOpenFileName result is received (including failure to
// launch or a crash of the utility process).
void WaitForCompletion();
// Returns the selected directory.
const base::FilePath& directory() const { return directory_; }
// Returns the list of selected filenames. Each should be interpreted as a
// child of directory().
const std::vector<base::FilePath>& filenames() const { return filenames_; }
// UtilityProcessHostClient implementation
virtual void OnProcessCrashed(int exit_code) OVERRIDE;
virtual void OnProcessLaunchFailed() OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
protected:
virtual ~GetOpenFileNameClient();
private:
void OnResult(const base::FilePath& directory,
const std::vector<base::FilePath>& filenames);
void OnFailure();
base::FilePath directory_;
std::vector<base::FilePath> filenames_;
base::WaitableEvent event_;
DISALLOW_COPY_AND_ASSIGN(GetOpenFileNameClient);
};
GetOpenFileNameClient::GetOpenFileNameClient() : event_(true, false) {
}
void GetOpenFileNameClient::WaitForCompletion() {
event_.Wait();
}
void GetOpenFileNameClient::OnProcessCrashed(int exit_code) {
event_.Signal();
}
void GetOpenFileNameClient::OnProcessLaunchFailed() {
event_.Signal();
}
bool GetOpenFileNameClient::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(GetOpenFileNameClient, message)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GetOpenFileName_Failed,
OnFailure)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GetOpenFileName_Result,
OnResult)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
GetOpenFileNameClient::~GetOpenFileNameClient() {}
void GetOpenFileNameClient::OnResult(
const base::FilePath& directory,
const std::vector<base::FilePath>& filenames) {
directory_ = directory;
filenames_ = filenames;
event_.Signal();
}
void GetOpenFileNameClient::OnFailure() {
event_.Signal();
}
// Initiates IPC with a new utility process using |client|. Instructs the
// utility process to call GetOpenFileName with |ofn|. |current_task_runner|
// must be the currently executing task runner.
void DoInvokeGetOpenFileName(
OPENFILENAME* ofn,
scoped_refptr<GetOpenFileNameClient> client,
const scoped_refptr<base::SequencedTaskRunner>& current_task_runner) {
DCHECK(current_task_runner->RunsTasksOnCurrentThread());
base::WeakPtr<content::UtilityProcessHost> utility_process_host(
content::UtilityProcessHost::Create(client, current_task_runner)
->AsWeakPtr());
utility_process_host->DisableSandbox();
utility_process_host->Send(new ChromeUtilityMsg_GetOpenFileName(
ofn->hwndOwner,
ofn->Flags,
ui::win::OpenFileName::GetFilters(ofn),
base::FilePath(ofn->lpstrInitialDir ? ofn->lpstrInitialDir
: base::string16()),
base::FilePath(ofn->lpstrFile)));
}
// Invokes GetOpenFileName in a utility process. Blocks until the result is
// received. Uses |blocking_task_runner| for IPC.
bool GetOpenFileNameInUtilityProcess(
const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner,
OPENFILENAME* ofn) {
scoped_refptr<GetOpenFileNameClient> client(new GetOpenFileNameClient);
blocking_task_runner->PostTask(
FROM_HERE,
base::Bind(&DoInvokeGetOpenFileName,
base::Unretained(ofn), client, blocking_task_runner));
client->WaitForCompletion();
if (!client->filenames().size())
return false;
ui::win::OpenFileName::SetResult(
client->directory(), client->filenames(), ofn);
return true;
}
// Implements GetOpenFileName for CreateWinSelectFileDialog by delegating either
// to Metro or a utility process.
bool GetOpenFileNameImpl(
const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner,
OPENFILENAME* ofn) {
HMODULE metro_module = base::win::GetMetroModule();
if (metro_module != NULL) {
typedef BOOL (*MetroGetOpenFileName)(OPENFILENAME*);
MetroGetOpenFileName metro_get_open_file_name =
reinterpret_cast<MetroGetOpenFileName>(
::GetProcAddress(metro_module, "MetroGetOpenFileName"));
if (metro_get_open_file_name == NULL) {
NOTREACHED();
return false;
}
return metro_get_open_file_name(ofn) == TRUE;
}
if (base::FieldTrialList::FindFullName("IsolateShellOperations") ==
"Enabled") {
return GetOpenFileNameInUtilityProcess(blocking_task_runner, ofn);
}
return ::GetOpenFileName(ofn) == TRUE;
}
} // namespace
ChromeSelectFileDialogFactory::ChromeSelectFileDialogFactory(
const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner)
: blocking_task_runner_(blocking_task_runner) {
}
ChromeSelectFileDialogFactory::~ChromeSelectFileDialogFactory() {}
ui::SelectFileDialog* ChromeSelectFileDialogFactory::Create(
ui::SelectFileDialog::Listener* listener,
ui::SelectFilePolicy* policy) {
return ui::CreateWinSelectFileDialog(
listener,
policy,
base::Bind(GetOpenFileNameImpl, blocking_task_runner_));
}
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