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cef/libcef/browser/file_dialog_manager.cc

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// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2012 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 "cef/libcef/browser/file_dialog_manager.h"
#include <utility>
#include "base/memory/raw_ptr.h"
#include "base/strings/utf_string_conversions.h"
#include "cef/include/cef_dialog_handler.h"
#include "cef/libcef/browser/browser_host_base.h"
#include "cef/libcef/browser/context.h"
#include "cef/libcef/browser/thread_util.h"
#include "chrome/browser/file_select_helper.h"
#include "content/public/browser/file_select_listener.h"
#include "content/public/browser/render_frame_host.h"
#include "ui/shell_dialogs/select_file_policy.h"
#include "ui/shell_dialogs/selected_file_info.h"
using blink::mojom::FileChooserParams;
namespace {
class CefFileDialogCallbackImpl : public CefFileDialogCallback {
public:
using CallbackType = CefFileDialogManager::RunFileChooserCallback;
explicit CefFileDialogCallbackImpl(CallbackType callback)
: callback_(std::move(callback)) {}
~CefFileDialogCallbackImpl() override {
if (!callback_.is_null()) {
// The callback is still pending. Cancel it now.
if (CEF_CURRENTLY_ON_UIT()) {
CancelNow(std::move(callback_));
} else {
CEF_POST_TASK(CEF_UIT,
base::BindOnce(&CefFileDialogCallbackImpl::CancelNow,
std::move(callback_)));
}
}
}
void Continue(const std::vector<CefString>& file_paths) override {
if (CEF_CURRENTLY_ON_UIT()) {
if (!callback_.is_null()) {
std::vector<base::FilePath> vec;
if (!file_paths.empty()) {
std::vector<CefString>::const_iterator it = file_paths.begin();
for (; it != file_paths.end(); ++it) {
vec.push_back(base::FilePath(*it));
}
}
std::move(callback_).Run(vec);
}
} else {
CEF_POST_TASK(CEF_UIT,
base::BindOnce(&CefFileDialogCallbackImpl::Continue, this,
file_paths));
}
}
void Cancel() override {
if (CEF_CURRENTLY_ON_UIT()) {
if (!callback_.is_null()) {
CancelNow(std::move(callback_));
}
} else {
CEF_POST_TASK(CEF_UIT,
base::BindOnce(&CefFileDialogCallbackImpl::Cancel, this));
}
}
[[nodiscard]] CallbackType Disconnect() { return std::move(callback_); }
private:
static void CancelNow(CallbackType callback) {
CEF_REQUIRE_UIT();
std::vector<base::FilePath> file_paths;
std::move(callback).Run(file_paths);
}
CallbackType callback_;
IMPLEMENT_REFCOUNTING(CefFileDialogCallbackImpl);
};
void RunFileDialogDismissed(CefRefPtr<CefRunFileDialogCallback> callback,
const std::vector<base::FilePath>& file_paths) {
std::vector<CefString> paths;
if (file_paths.size() > 0) {
for (const auto& file_path : file_paths) {
paths.push_back(file_path.value());
}
}
callback->OnFileDialogDismissed(paths);
}
// Based on net/base/filename_util_internal.cc FilePathToString16().
std::u16string FilePathTypeToString16(const base::FilePath::StringType& str) {
std::u16string result;
#if BUILDFLAG(IS_WIN)
result.assign(str.begin(), str.end());
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
if (!str.empty()) {
base::UTF8ToUTF16(str.c_str(), str.size(), &result);
}
#endif
return result;
}
FileChooserParams SelectFileToFileChooserParams(
ui::SelectFileDialog::Type type,
const std::u16string& title,
const base::FilePath& default_path,
const ui::SelectFileDialog::FileTypeInfo* file_types) {
FileChooserParams params;
std::optional<FileChooserParams::Mode> mode;
switch (type) {
case ui::SelectFileDialog::Type::SELECT_UPLOAD_FOLDER:
mode = FileChooserParams::Mode::kUploadFolder;
break;
case ui::SelectFileDialog::Type::SELECT_SAVEAS_FILE:
mode = FileChooserParams::Mode::kSave;
break;
case ui::SelectFileDialog::Type::SELECT_OPEN_FILE:
mode = FileChooserParams::Mode::kOpen;
break;
case ui::SelectFileDialog::Type::SELECT_OPEN_MULTI_FILE:
mode = FileChooserParams::Mode::kOpenMultiple;
break;
default:
NOTIMPLEMENTED();
return params;
}
params.mode = *mode;
params.title = title;
params.default_file_name = default_path;
if (file_types) {
// |file_types| comes from FileSelectHelper::GetFileTypesFromAcceptType.
// |extensions| is a list of allowed extensions. For example, it might be
// { { "htm", "html" }, { "txt" } }
for (size_t i = 0; i < file_types->extensions.size(); ++i) {
if (file_types->extension_mimetypes.size() > i &&
!file_types->extension_mimetypes[i].empty()) {
// Use the original mime type.
params.accept_types.push_back(file_types->extension_mimetypes[i]);
} else if (file_types->extensions[i].size() == 1) {
// Use the single file extension. We ignore the "Custom Files" filter
// which is the only instance of multiple file extensions.
params.accept_types.push_back(FilePathTypeToString16(
FILE_PATH_LITERAL(".") + file_types->extensions[i][0]));
}
}
}
return params;
}
class CefFileSelectListener : public content::FileSelectListener {
public:
using CallbackType = CefFileDialogManager::RunFileChooserCallback;
explicit CefFileSelectListener(CallbackType callback)
: callback_(std::move(callback)) {}
private:
~CefFileSelectListener() override = default;
void FileSelected(std::vector<blink::mojom::FileChooserFileInfoPtr> files,
const base::FilePath& base_dir,
FileChooserParams::Mode mode) override {
std::vector<base::FilePath> paths;
if (mode == FileChooserParams::Mode::kUploadFolder) {
if (!base_dir.empty()) {
paths.push_back(base_dir);
}
} else if (!files.empty()) {
for (auto& file : files) {
if (file->is_native_file()) {
paths.push_back(file->get_native_file()->file_path);
} else {
NOTIMPLEMENTED();
}
}
}
std::move(callback_).Run(paths);
}
void FileSelectionCanceled() override { std::move(callback_).Run({}); }
CallbackType callback_;
};
} // namespace
class CefSelectFileDialogListener : public ui::SelectFileDialog::Listener {
public:
CefSelectFileDialogListener(ui::SelectFileDialog::Listener* listener,
base::OnceClosure callback)
: listener_(listener), callback_(std::move(callback)) {}
CefSelectFileDialogListener(const CefSelectFileDialogListener&) = delete;
CefSelectFileDialogListener& operator=(const CefSelectFileDialogListener&) =
delete;
void Cancel(bool listener_destroyed) {
if (executing_) {
// We're likely still on the stack. Do nothing and wait for Destroy().
return;
}
if (listener_destroyed) {
// Don't execute the listener.
Destroy();
} else {
FileSelectionCanceled();
}
}
ui::SelectFileDialog::Listener* listener() const { return listener_; }
private:
~CefSelectFileDialogListener() override = default;
void FileSelected(const ui::SelectedFileInfo& file, int index) override {
executing_ = true;
listener_.ExtractAsDangling()->FileSelected(file, index);
Destroy();
}
void MultiFilesSelected(
const std::vector<ui::SelectedFileInfo>& files) override {
executing_ = true;
listener_.ExtractAsDangling()->MultiFilesSelected(files);
Destroy();
}
void FileSelectionCanceled() override {
executing_ = true;
listener_.ExtractAsDangling()->FileSelectionCanceled();
Destroy();
}
void Destroy() {
std::move(callback_).Run();
delete this;
}
raw_ptr<ui::SelectFileDialog::Listener> listener_;
base::OnceClosure callback_;
// Used to avoid re-entrancy from Cancel().
bool executing_ = false;
};
CefFileDialogManager::CefFileDialogManager(CefBrowserHostBase* browser)
: browser_(browser) {}
CefFileDialogManager::~CefFileDialogManager() = default;
void CefFileDialogManager::Destroy() {
if (dialog_listener_) {
// Cancel the listener and delete related objects.
SelectFileDoneByListenerCallback(/*listener=*/nullptr,
/*listener_destroyed=*/false);
}
DCHECK(!dialog_);
DCHECK(!dialog_listener_);
DCHECK(active_listeners_.empty());
}
void CefFileDialogManager::RunFileDialog(
cef_file_dialog_mode_t mode,
const CefString& title,
const CefString& default_file_path,
const std::vector<CefString>& accept_filters,
CefRefPtr<CefRunFileDialogCallback> callback) {
DCHECK(callback.get());
if (!callback.get()) {
return;
}
blink::mojom::FileChooserParams params;
switch (mode) {
case FILE_DIALOG_OPEN:
params.mode = blink::mojom::FileChooserParams::Mode::kOpen;
break;
case FILE_DIALOG_OPEN_MULTIPLE:
params.mode = blink::mojom::FileChooserParams::Mode::kOpenMultiple;
break;
case FILE_DIALOG_OPEN_FOLDER:
params.mode = blink::mojom::FileChooserParams::Mode::kUploadFolder;
break;
case FILE_DIALOG_SAVE:
params.mode = blink::mojom::FileChooserParams::Mode::kSave;
break;
}
params.title = title;
if (!default_file_path.empty()) {
params.default_file_name = base::FilePath(default_file_path);
}
if (!accept_filters.empty()) {
std::vector<CefString>::const_iterator it = accept_filters.begin();
for (; it != accept_filters.end(); ++it) {
params.accept_types.push_back(*it);
}
}
RunFileChooser(params, base::BindOnce(RunFileDialogDismissed, callback));
}
void CefFileDialogManager::RunFileChooser(
const blink::mojom::FileChooserParams& params,
RunFileChooserCallback callback) {
CEF_REQUIRE_UIT();
// Execute the delegate with the most exact version of |params|. If not
// handled here there will be another call to the delegate from RunSelectFile.
// It might be better to execute the delegate only the single time here, but
// we don't currently have sufficient state in RunSelectFile to know that the
// delegate has already been executed. Also, we haven't retrieved file
// extension data at this point.
callback = MaybeRunDelegate(params, Extensions(), Descriptions(),
std::move(callback));
if (callback.is_null()) {
// The delegate kept the callback.
return;
}
FileChooserParams new_params = params;
// Make sure we get native files in CefFileSelectListener.
new_params.need_local_path = true;
// Requirements of FileSelectHelper.
if (params.mode != FileChooserParams::Mode::kSave) {
new_params.default_file_name = base::FilePath();
} else {
new_params.default_file_name = new_params.default_file_name.BaseName();
}
// FileSelectHelper is usually only used for renderer-initiated dialogs via
// WebContentsDelegate::RunFileChooser. We choose to use it here instead of
// calling ui::SelectFileDialog::Create directly because it provides some nice
// functionality related to default dialog settings and filter list
// generation. We customize the behavior slightly for non-renderer-initiated
// dialogs by passing the |run_from_cef=true| flag. FileSelectHelper uses
// ui::SelectFileDialog::Create internally and that call will be intercepted
// by CefSelectFileDialogFactory, resulting in call to RunSelectFile below.
// See related comments on CefSelectFileDialogFactory.
FileSelectHelper::RunFileChooser(
browser_->GetWebContents()->GetPrimaryMainFrame(),
base::MakeRefCounted<CefFileSelectListener>(std::move(callback)),
new_params, /*run_from_cef=*/true);
}
void CefFileDialogManager::RunSelectFile(
ui::SelectFileDialog::Listener* listener,
std::unique_ptr<ui::SelectFilePolicy> policy,
ui::SelectFileDialog::Type type,
const std::u16string& title,
const base::FilePath& default_path,
const ui::SelectFileDialog::FileTypeInfo* file_types,
int file_type_index,
const base::FilePath::StringType& default_extension,
gfx::NativeWindow owning_window) {
CEF_REQUIRE_UIT();
active_listeners_.insert(listener);
auto chooser_params =
SelectFileToFileChooserParams(type, title, default_path, file_types);
auto callback = base::BindOnce(
&CefFileDialogManager::SelectFileDoneByDelegateCallback,
weak_ptr_factory_.GetWeakPtr(), base::UnsafeDangling(listener));
callback = MaybeRunDelegate(chooser_params, file_types->extensions,
file_types->extension_description_overrides,
std::move(callback));
if (callback.is_null()) {
// The delegate kept the callback.
return;
}
if (dialog_) {
LOG(ERROR) << "Multiple simultaneous dialogs are not supported; "
"canceling the file dialog";
std::move(callback).Run({});
return;
}
#if BUILDFLAG(IS_LINUX)
// We can't use GtkUi in combination with multi-threaded-message-loop because
// Chromium's GTK implementation doesn't use GDK threads.
if (!!CefContext::Get()->settings().multi_threaded_message_loop) {
LOG(ERROR) << "Default dialog implementation is not available; "
"canceling the file dialog";
std::move(callback).Run({});
return;
}
#endif
// |callback| is no longer used at this point.
callback.Reset();
DCHECK(!dialog_listener_);
// This object will delete itself.
dialog_listener_ = new CefSelectFileDialogListener(
listener,
base::BindOnce(&CefFileDialogManager::SelectFileDoneByListenerCallback,
weak_ptr_factory_.GetWeakPtr(),
base::UnsafeDangling(listener),
/*listener_destroyed=*/true));
// This call will not be intercepted by CefSelectFileDialogFactory due to the
// |run_from_cef=true| flag.
// See related comments on CefSelectFileDialogFactory.
dialog_ = ui::SelectFileDialog::Create(dialog_listener_, std::move(policy),
/*run_from_cef=*/true);
// With windowless rendering use the parent handle specified by the client.
if (browser_->IsWindowless()) {
DCHECK(!owning_window);
dialog_->set_owning_widget(browser_->GetWindowHandle());
}
dialog_->SelectFile(type, title, default_path, file_types, file_type_index,
default_extension, owning_window);
}
void CefFileDialogManager::SelectFileListenerDestroyed(
ui::SelectFileDialog::Listener* listener) {
CEF_REQUIRE_UIT();
DCHECK(listener);
// This notification will arrive from whomever owns |listener|, so we don't
// want to execute any |listener| methods after this point.
if (dialog_listener_) {
// Cancel the currently active dialog.
SelectFileDoneByListenerCallback(listener, /*listener_destroyed=*/true);
} else {
// Any future SelectFileDoneByDelegateCallback call for |listener| becomes a
// no-op.
active_listeners_.erase(listener);
}
}
CefFileDialogManager::RunFileChooserCallback
CefFileDialogManager::MaybeRunDelegate(
const blink::mojom::FileChooserParams& params,
const Extensions& extensions,
const Descriptions& descriptions,
RunFileChooserCallback callback) {
// |extensions| and |descriptions| may be empty, or may contain 1 additional
// entry for the "Custom Files" filter.
DCHECK(extensions.empty() || extensions.size() >= params.accept_types.size());
DCHECK(descriptions.empty() ||
descriptions.size() >= params.accept_types.size());
if (auto client = browser_->client()) {
if (auto handler = browser_->client()->GetDialogHandler()) {
int mode = FILE_DIALOG_OPEN;
switch (params.mode) {
case blink::mojom::FileChooserParams::Mode::kOpen:
mode = FILE_DIALOG_OPEN;
break;
case blink::mojom::FileChooserParams::Mode::kOpenMultiple:
mode = FILE_DIALOG_OPEN_MULTIPLE;
break;
case blink::mojom::FileChooserParams::Mode::kUploadFolder:
mode = FILE_DIALOG_OPEN_FOLDER;
break;
case blink::mojom::FileChooserParams::Mode::kSave:
mode = FILE_DIALOG_SAVE;
break;
default:
DCHECK(false);
break;
}
std::vector<CefString> accept_filters;
for (auto& accept_type : params.accept_types) {
accept_filters.push_back(accept_type);
}
std::vector<CefString> accept_extensions;
std::vector<CefString> accept_descriptions;
if (extensions.empty()) {
// We don't know the expansion of mime type values at this time,
// so only include the single file extensions.
for (auto& accept_type : params.accept_types) {
accept_extensions.push_back(
accept_type.ends_with(u"/*") ? std::u16string() : accept_type);
}
// Empty descriptions.
accept_descriptions.resize(params.accept_types.size());
} else {
// There may be 1 additional entry in |extensions| and |descriptions|
// that we want to ignore (for the "Custom Files" filter).
for (size_t i = 0; i < params.accept_types.size(); ++i) {
const auto& extension_list = extensions[i];
std::u16string ext_str;
for (auto& ext : extension_list) {
if (!ext_str.empty()) {
ext_str += u";";
}
ext_str += FilePathTypeToString16(FILE_PATH_LITERAL(".") + ext);
}
accept_extensions.push_back(ext_str);
accept_descriptions.push_back(descriptions[i]);
}
}
CefRefPtr<CefFileDialogCallbackImpl> callbackImpl(
new CefFileDialogCallbackImpl(std::move(callback)));
const bool handled = handler->OnFileDialog(
browser_.get(), static_cast<cef_file_dialog_mode_t>(mode),
params.title, params.default_file_name.value(), accept_filters,
accept_extensions, accept_descriptions, callbackImpl.get());
if (!handled) {
// May return nullptr if the client has already executed the callback.
callback = callbackImpl->Disconnect();
LOG_IF(ERROR, callback.is_null())
<< "Should return true from OnFileDialog when executing the "
"callback";
}
}
}
return callback;
}
void CefFileDialogManager::SelectFileDoneByDelegateCallback(
MayBeDangling<ui::SelectFileDialog::Listener> listener,
const std::vector<base::FilePath>& paths) {
CEF_REQUIRE_UIT();
// The listener may already be gone. This can occur if the client holds a
// RunFileChooserCallback past the call to SelectFileListenerDestroyed().
if (active_listeners_.find(listener) == active_listeners_.end()) {
return;
}
active_listeners_.erase(listener.get());
if (paths.empty()) {
listener->FileSelectionCanceled();
} else if (paths.size() == 1) {
listener->FileSelected(ui::SelectedFileInfo(paths[0]), /*index=*/0);
} else {
listener->MultiFilesSelected(ui::FilePathListToSelectedFileInfoList(paths));
}
// |listener| is likely deleted at this point.
}
void CefFileDialogManager::SelectFileDoneByListenerCallback(
MayBeDangling<ui::SelectFileDialog::Listener> listener,
bool listener_destroyed) {
CEF_REQUIRE_UIT();
// |listener| will be provided iff |listener_destroyed=true|, as
// |dialog_listener_->listener()| will return nullptr at this point.
DCHECK(!listener || listener_destroyed);
// Avoid re-entrancy of this method. CefSelectFileDialogListener callbacks to
// the delegated listener may result in an immediate call to
// SelectFileListenerDestroyed() while |dialog_listener_| is still on the
// stack, followed by another execution from
// CefSelectFileDialogListener::Destroy(). Similarly, the below call to
// Cancel() may trigger another execution from
// CefSelectFileDialogListener::Destroy().
if (!dialog_listener_) {
return;
}
DCHECK(dialog_);
DCHECK(dialog_listener_);
active_listeners_.erase(listener ? listener.get()
: dialog_listener_->listener());
// Clear |dialog_listener_| before calling Cancel() to avoid re-entrancy.
auto dialog_listener = dialog_listener_;
dialog_listener_ = nullptr;
dialog_listener->Cancel(listener_destroyed);
// There should be no further listener callbacks after this call.
dialog_->ListenerDestroyed();
dialog_ = nullptr;
}
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