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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/shell_dialogs/select_file_dialog.h"
#include <stddef.h>
#include <algorithm>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/ptr_util.h"
#include "base/notreached.h"
#include "base/sequence_checker.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversion_utils.h"
#include "base/task/single_thread_task_runner.h"
#include "base/third_party/icu/icu_utf.h"
#include "build/build_config.h"
#include "ui/shell_dialogs/select_file_dialog_factory.h"
#include "ui/shell_dialogs/select_file_policy.h"
#include "ui/shell_dialogs/selected_file_info.h"
#include "url/gurl.h"
namespace {
// Optional dialog factory. Leaked.
ui::SelectFileDialogFactory* dialog_factory_ = nullptr;
void TruncateStringToSize(base::FilePath::StringType* string, size_t size) {
if (string->size() <= size)
return;
#if BUILDFLAG(IS_WIN)
const auto* c_str = base::as_u16cstr(string->c_str());
for (size_t i = 0; i < string->size(); ++i) {
base_icu::UChar32 codepoint;
size_t original_i = i;
if (!base::ReadUnicodeCharacter(c_str, size, &i, &codepoint) || i >= size) {
string->resize(original_i);
return;
}
}
#else
base::TruncateUTF8ToByteSize(*string, size, string);
#endif
}
} // namespace
namespace ui {
void SelectFileDialog::Listener::MultiFilesSelected(
const std::vector<SelectedFileInfo>& files) {
NOTREACHED();
}
SelectFileDialog::FileTypeInfo::FileTypeInfo() = default;
SelectFileDialog::FileTypeInfo::FileTypeInfo(const FileTypeInfo& other) =
default;
SelectFileDialog::FileTypeInfo::FileTypeInfo(FileExtensionList in_extensions)
: extensions({std::move(in_extensions)}) {}
SelectFileDialog::FileTypeInfo::FileTypeInfo(
std::vector<FileExtensionList> in_extensions)
: extensions(std::move(in_extensions)) {}
SelectFileDialog::FileTypeInfo::FileTypeInfo(
std::vector<FileExtensionList> in_extensions,
std::vector<std::u16string> in_descriptions)
: extensions(std::move(in_extensions)),
extension_description_overrides(std::move(in_descriptions)) {
CHECK(extension_description_overrides.empty() ||
extension_description_overrides.size() == extensions.size());
}
SelectFileDialog::FileTypeInfo::~FileTypeInfo() = default;
// static
void SelectFileDialog::SetFactory(
std::unique_ptr<ui::SelectFileDialogFactory> factory) {
delete dialog_factory_;
dialog_factory_ = factory.release();
}
// static
scoped_refptr<SelectFileDialog> SelectFileDialog::Create(
Listener* listener,
std::unique_ptr<ui::SelectFilePolicy> policy) {
if (dialog_factory_)
return dialog_factory_->Create(listener, std::move(policy));
return CreateSelectFileDialog(listener, std::move(policy));
}
base::FilePath SelectFileDialog::GetShortenedFilePath(
const base::FilePath& path) {
const size_t kMaxNameLength = 255;
if (path.BaseName().value().length() <= kMaxNameLength)
return path;
base::FilePath filename = path.BaseName();
base::FilePath::StringType extension = filename.FinalExtension();
filename = filename.RemoveFinalExtension();
base::FilePath::StringType file_string = filename.value();
// 1 for . plus 12 for longest known extension.
size_t max_extension_length = 13;
if (file_string.length() < kMaxNameLength) {
max_extension_length =
std::max(max_extension_length, kMaxNameLength - file_string.length());
}
// Take the first max_extension_length characters (this will be the
// leading '.' plus the next max_extension_length - 1).
TruncateStringToSize(&extension, max_extension_length);
TruncateStringToSize(&file_string, kMaxNameLength - extension.length());
return path.DirName().Append(file_string).AddExtension(extension);
}
#if BUILDFLAG(IS_ANDROID)
// These are overridden by Android's SelectFileDialog subclass.
void SelectFileDialog::SetAcceptTypes(std::vector<std::u16string> types) {}
void SelectFileDialog::SetUseMediaCapture(bool use_media_capture) {}
void SelectFileDialog::SetOpenWritable(bool open_writable) {}
#endif
void SelectFileDialog::SelectFile(
Type type,
const std::u16string& title,
const base::FilePath& default_path,
const FileTypeInfo* file_types,
int file_type_index,
const base::FilePath::StringType& default_extension,
gfx::NativeWindow owning_window,
const GURL* caller) {
DCHECK(listener_);
if (select_file_policy_.get() &&
!select_file_policy_->CanOpenSelectFileDialog()) {
select_file_policy_->SelectFileDenied();
// Inform the listener that no file was selected.
// Post a task rather than calling FileSelectionCanceled directly to ensure
// that the listener is called asynchronously.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&SelectFileDialog::CancelFileSelection, this));
return;
}
base::FilePath path = GetShortenedFilePath(default_path);
// Call the platform specific implementation of the file selection dialog.
SelectFileImpl(type, title, path, file_types, file_type_index,
default_extension, owning_window, caller);
}
bool SelectFileDialog::HasMultipleFileTypeChoices() {
return HasMultipleFileTypeChoicesImpl();
}
SelectFileDialog::SelectFileDialog(Listener* listener,
std::unique_ptr<ui::SelectFilePolicy> policy)
: listener_(listener), select_file_policy_(std::move(policy)) {
DCHECK(listener_);
}
SelectFileDialog::~SelectFileDialog() {}
void SelectFileDialog::CancelFileSelection() {
if (listener_)
listener_->FileSelectionCanceled();
}
} // namespace ui
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