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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 PPAPI_CPP_DEV_FILE_CHOOSER_DEV_H_
#define PPAPI_CPP_DEV_FILE_CHOOSER_DEV_H_
#include "ppapi/c/dev/ppb_file_chooser_dev.h"
#include "ppapi/cpp/resource.h"
namespace pp {
class CompletionCallback;
class FileRef;
class Instance;
class Var;
class FileChooser_Dev : public Resource {
public:
/// Creates an is_null() FileChooser object.
FileChooser_Dev() {}
/// This function creates a file chooser dialog resource. The chooser is
/// associated with a particular instance, so that it may be positioned on the
/// screen relative to the tab containing the instance. Returns 0 if passed
/// an invalid instance.
///
/// @param mode A PPB_FileChooser_Dev instance can be used to select a single
/// file (PP_FILECHOOSERMODE_OPEN) or multiple files
/// (PP_FILECHOOSERMODE_OPENMULTIPLE). Unlike the HTML5 <input type="file">
/// tag, a PPB_FileChooser_Dev instance cannot be used to select a directory.
/// In order to get the list of files in a directory, the
/// PPB_DirectoryReader_Dev interface must be used.
///
/// @param accept_mime_types A comma-separated list of MIME types such as
/// "audio/ *,text/plain" (note there should be no space between the '/' and
/// the '*', but one is added to avoid confusing C++ comments). The dialog
/// may restrict selectable files to the specified MIME types. An empty string
/// or an undefined var may be given to indicate that all types should be
/// accepted.
///
/// TODO(darin): What if the mime type is unknown to the system? The plugin
/// may wish to describe the mime type and provide a matching file extension.
/// It is more webby to use mime types here instead of file extensions.
FileChooser_Dev(const Instance* instance,
PP_FileChooserMode_Dev mode,
const Var& accept_mime_types);
FileChooser_Dev(const FileChooser_Dev& other);
/// This function displays a previously created file chooser resource as a
/// dialog box, prompting the user to choose a file or files. The callback is
/// called with PP_OK on successful completion with a file (or files) selected
/// or PP_ERROR_USERCANCEL if the user selected no file.
///
/// @return PP_OK_COMPLETIONPENDING if request to show the dialog was
/// successful, another error code from pp_errors.h on failure.
virtual int32_t Show(const CompletionCallback& cc);
/// After a successful completion callback call from Show, this method may be
/// used to query the chosen files. It should be called in a loop until it
/// returns an is_null() FileRef. Depending on the PP_ChooseFileMode
/// requested when the FileChooser was created, the file refs will either
/// be readable or writable. Their file system type will be
/// PP_FileSystemType_External. If the user chose no files or cancelled the
/// dialog, then this method will simply return an is_null() FileRef the
/// first time it is called.
virtual FileRef GetNextChosenFile() const;
};
} // namespace pp
#endif // PPAPI_CPP_DEV_FILE_CHOOSER_DEV_H_
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