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// Copyright (c) 2011 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 CHROME_BROWSER_FILE_SELECT_HELPER_H_
#define CHROME_BROWSER_FILE_SELECT_HELPER_H_
#pragma once
#include <map>
#include <vector>
#include "base/compiler_specific.h"
#include "chrome/browser/ui/select_file_dialog.h"
#include "content/browser/tab_contents/tab_contents_observer.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "net/base/directory_lister.h"
class Profile;
class RenderViewHost;
namespace content {
struct FileChooserParams;
}
// This class handles file-selection requests coming from WebUI elements
// (via the ExtensionHost class). It implements both the initialisation
// and listener functions for file-selection dialogs.
class FileSelectHelper
: public base::RefCountedThreadSafe<FileSelectHelper>,
public SelectFileDialog::Listener,
public content::NotificationObserver {
public:
explicit FileSelectHelper(Profile* profile);
// Show the file chooser dialog.
void RunFileChooser(RenderViewHost* render_view_host,
TabContents* tab_contents,
const content::FileChooserParams& params);
// Enumerates all the files in directory.
void EnumerateDirectory(int request_id,
RenderViewHost* render_view_host,
const FilePath& path);
private:
friend class base::RefCountedThreadSafe<FileSelectHelper>;
virtual ~FileSelectHelper();
// Utility class which can listen for directory lister events and relay
// them to the main object with the correct tracking id.
class DirectoryListerDispatchDelegate
: public net::DirectoryLister::DirectoryListerDelegate {
public:
DirectoryListerDispatchDelegate(FileSelectHelper* parent, int id)
: parent_(parent),
id_(id) {}
virtual ~DirectoryListerDispatchDelegate() {}
virtual void OnListFile(
const net::DirectoryLister::DirectoryListerData& data) OVERRIDE {
parent_->OnListFile(id_, data);
}
virtual void OnListDone(int error) OVERRIDE {
parent_->OnListDone(id_, error);
}
private:
// This FileSelectHelper owns this object.
FileSelectHelper* parent_;
int id_;
DISALLOW_COPY_AND_ASSIGN(DirectoryListerDispatchDelegate);
};
void RunFileChooserOnFileThread(
const content::FileChooserParams& params);
void RunFileChooserOnUIThread(
const content::FileChooserParams& 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.
virtual void FileSelected(
const FilePath& path, int index, void* params) OVERRIDE;
virtual void MultiFilesSelected(const std::vector<FilePath>& files,
void* params) OVERRIDE;
virtual void FileSelectionCanceled(void* params) OVERRIDE;
// content::NotificationObserver overrides.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Kicks off a new directory enumeration.
void StartNewEnumeration(const FilePath& path,
int request_id,
RenderViewHost* render_view_host);
// Callbacks from directory enumeration.
virtual void OnListFile(
int id,
const net::DirectoryLister::DirectoryListerData& data);
virtual void OnListDone(int id, int error);
// Cleans up and releases this instance. This must be called after the last
// callback is received from the enumeration code.
void EnumerateDirectoryEnd();
// Helper method to get allowed extensions for select file dialog from
// the specified accept types as defined in the spec:
// http://whatwg.org/html/number-state.html#attr-input-accept
// |accept_types| contains only valid lowercased MIME types.
SelectFileDialog::FileTypeInfo* GetFileTypesFromAcceptType(
const std::vector<string16>& accept_types);
// Profile used to set/retrieve the last used directory.
Profile* profile_;
// The RenderViewHost and TabContents for the page showing a file dialog
// (may only be one such dialog).
RenderViewHost* render_view_host_;
TabContents* tab_contents_;
// Dialog box used for choosing files to upload from file form fields.
scoped_refptr<SelectFileDialog> select_file_dialog_;
scoped_ptr<SelectFileDialog::FileTypeInfo> select_file_types_;
// The type of file dialog last shown.
SelectFileDialog::Type dialog_type_;
// Maintain a list of active directory enumerations. These could come from
// the file select dialog or from drag-and-drop of directories, so there could
// be more than one going on at a time.
struct ActiveDirectoryEnumeration;
std::map<int, ActiveDirectoryEnumeration*> directory_enumerations_;
// Registrar for notifications regarding our RenderViewHost.
content::NotificationRegistrar notification_registrar_;
DISALLOW_COPY_AND_ASSIGN(FileSelectHelper);
};
#endif // CHROME_BROWSER_FILE_SELECT_HELPER_H_
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