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// Copyright 2019 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.
#ifndef WEBLAYER_BROWSER_FILE_SELECT_HELPER_H_
#define WEBLAYER_BROWSER_FILE_SELECT_HELPER_H_
#include <memory>
#include <vector>
#include "base/macros.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/file_select_listener.h"
#include "content/public/browser/web_contents_observer.h"
#include "ui/shell_dialogs/select_file_dialog.h"
namespace content {
class FileSelectListener;
} // namespace content
namespace ui {
struct SelectedFileInfo;
}
namespace weblayer {
// This class handles file-selection requests coming from renderer processes.
// It implements both the initialisation and listener functions for
// file-selection dialogs.
//
// Since FileSelectHelper listens to observations of a widget, it needs to live
// on and be destroyed on the UI thread. References to FileSelectHelper may be
// passed on to other threads.
class FileSelectHelper : public base::RefCountedThreadSafe<
FileSelectHelper,
content::BrowserThread::DeleteOnUIThread>,
public ui::SelectFileDialog::Listener,
public content::WebContentsObserver {
public:
// Show the file chooser dialog.
static void RunFileChooser(
content::RenderFrameHost* render_frame_host,
std::unique_ptr<content::FileSelectListener> listener,
const blink::mojom::FileChooserParams& params);
private:
friend class base::RefCountedThreadSafe<FileSelectHelper>;
friend class base::DeleteHelper<FileSelectHelper>;
friend struct content::BrowserThread::DeleteOnThread<
content::BrowserThread::UI>;
FileSelectHelper();
~FileSelectHelper() override;
void RunFileChooser(content::RenderFrameHost* render_frame_host,
std::unique_ptr<content::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 overrides.
void FileSelected(const base::FilePath& path,
int index,
void* params) override;
void FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file,
int index,
void* params) override;
void MultiFilesSelected(const std::vector<base::FilePath>& files,
void* params) override;
void MultiFilesSelectedWithExtraInfo(
const std::vector<ui::SelectedFileInfo>& files,
void* params) override;
void FileSelectionCanceled(void* params) 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);
// Calls RunFileChooserEnd() if the webcontents was destroyed. Returns true
// if the file chooser operation shouldn't proceed.
bool AbortIfWebContentsDestroyed();
// |listener_| receives the result of the FileSelectHelper.
std::unique_ptr<content::FileSelectListener> listener_;
// Dialog box used for choosing files to upload from file form fields.
scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
// 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;
DISALLOW_COPY_AND_ASSIGN(FileSelectHelper);
};
} // namespace weblayer
#endif // WEBLAYER_BROWSER_FILE_SELECT_HELPER_H_
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