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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_SHELL_BROWSER_SHELL_FILE_SELECT_HELPER_H_
#define CONTENT_SHELL_BROWSER_SHELL_FILE_SELECT_HELPER_H_
#include <memory>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/file_select_listener.h"
#include "net/base/directory_lister.h"
#include "third_party/blink/public/mojom/choosers/file_chooser.mojom-forward.h"
#include "ui/shell_dialogs/select_file_dialog.h"
namespace ui {
struct SelectedFileInfo;
}
namespace content {
class FileSelectListener;
class RenderFrameHost;
class WebContents;
// This class handles file-selection requests coming from renderer processes.
// It implements both the initialisation and listener functions for
// file-selection dialogs.
//
// Since ShellFileSelectHelper listens to observations of a widget, it needs to
// live on and be destroyed on the UI thread. References to
// ShellFileSelectHelper may be passed on to other threads.
class ShellFileSelectHelper
: public base::RefCountedThreadSafe<ShellFileSelectHelper,
BrowserThread::DeleteOnUIThread>,
public ui::SelectFileDialog::Listener,
private net::DirectoryLister::DirectoryListerDelegate {
public:
ShellFileSelectHelper(const ShellFileSelectHelper&) = delete;
ShellFileSelectHelper& operator=(const ShellFileSelectHelper&) = delete;
// Show the file chooser dialog.
static void RunFileChooser(content::RenderFrameHost* render_frame_host,
scoped_refptr<FileSelectListener> listener,
const blink::mojom::FileChooserParams& params);
private:
friend class base::RefCountedThreadSafe<ShellFileSelectHelper>;
friend class base::DeleteHelper<ShellFileSelectHelper>;
friend struct content::BrowserThread::DeleteOnThread<BrowserThread::UI>;
ShellFileSelectHelper();
~ShellFileSelectHelper() override;
void RunFileChooser(content::RenderFrameHost* render_frame_host,
scoped_refptr<FileSelectListener> listener,
blink::mojom::FileChooserParamsPtr params);
// Cleans up and releases this instance. This must be called after the last
// callback is received from the file chooser dialog.
void RunFileChooserEnd();
// SelectFileDialog::Listener:
void FileSelected(const ui::SelectedFileInfo& file, int index) override;
void MultiFilesSelected(
const std::vector<ui::SelectedFileInfo>& files) override;
void FileSelectionCanceled() override;
// Kicks off a new directory enumeration.
void StartNewEnumeration(const base::FilePath& path);
// net::DirectoryLister::DirectoryListerDelegate overrides.
void OnListFile(
const net::DirectoryLister::DirectoryListerData& data) override;
void OnListDone(int error) override;
// This method is called after the user has chosen the file(s) in the UI in
// order to process and filter the list before returning the final result to
// the caller.
void ConvertToFileChooserFileInfoList(
const std::vector<ui::SelectedFileInfo>& files);
// The enumeration root directory for EnumerateDirectory() and
// RunFileChooser with kUploadFolder.
base::FilePath base_dir_;
// Maintain an active directory enumeration. These could come from the file
// select dialog or from drag-and-drop of directories. There could not be
// more than one going on at a time.
struct ActiveDirectoryEnumeration;
std::unique_ptr<ActiveDirectoryEnumeration> directory_enumeration_;
// A weak pointer to the WebContents of the RenderFrameHost, for life checks.
base::WeakPtr<WebContents> web_contents_;
// |listener_| receives the result of the ShellFileSelectHelper.
scoped_refptr<FileSelectListener> listener_;
// Dialog box used for choosing files to upload from file form fields.
scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
std::unique_ptr<ui::SelectFileDialog::FileTypeInfo> select_file_types_;
// The type of file dialog last shown.
ui::SelectFileDialog::Type dialog_type_ =
ui::SelectFileDialog::SELECT_OPEN_FILE;
// The mode of file dialog last shown.
blink::mojom::FileChooserParams::Mode dialog_mode_ =
blink::mojom::FileChooserParams::Mode::kOpen;
};
} // namespace content
#endif // CONTENT_SHELL_BROWSER_SHELL_FILE_SELECT_HELPER_H_
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