/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
#ifndef INCLUDED_VCL_FILEVIEW_HXX
#define INCLUDED_VCL_FILEVIEW_HXX

#include <memory>
#include <com/sun/star/uno/Sequence.h>
#include <vcl/errinf.hxx>
#include <vcl/weld.hxx>
#include <rtl/ustring.hxx>

namespace com :: sun :: star :: ucb { class XContent; }

// class SvtFileView -----------------------------------------------------

class SvtFileView_Impl;
struct SvtContentEntry;

/// the result of an action in the FileView
enum FileViewResult
{
    eSuccess,
    eFailure,
    eTimeout,
    eStillRunning
};

enum FileViewMode
{
    eDetailedList,
    eIcon
};

/// describes parameters for doing an action on the FileView asynchronously
struct FileViewAsyncAction
{
    sal_uInt32  nMinTimeout;    /// minimum time to wait for a result, in milliseconds
    sal_uInt32  nMaxTimeout;    /// maximum time to wait for a result, in milliseconds, until eTimeout is returned
    Link<void*,void>  aFinishHandler; /// the handler to be called when the action is finished. Called in every case, no matter of the result

    FileViewAsyncAction() : nMinTimeout(0), nMaxTimeout (0)
    {
    }
};

class SvtFileView
{
private:
    std::unique_ptr<SvtFileView_Impl> mpImpl;
    css::uno::Sequence<OUString> maBlackList;

    DECL_LINK(HeaderSelect_Impl, int, void);

public:
    SvtFileView(weld::Window* pTopLevel,
                std::unique_ptr<weld::TreeView> xTreeView,
                std::unique_ptr<weld::IconView> xIconView,
                bool bOnlyFolder, bool bMultiSelection, bool bShowType = true);
    ~SvtFileView();

    void                    SetViewMode( FileViewMode eMode );

    const OUString&         GetViewURL() const;
    OUString                GetURL(const weld::TreeIter& rEntry) const;
    OUString                GetCurrentURL() const;

    bool                    GetParentURL( OUString& _rParentURL ) const;
    void                    CreatedFolder( const OUString& rUrl, const OUString& rNewFolder );

    void                    set_help_id(const OString& rHelpId);
    OString                 get_help_id() const;

    void                    grab_focus();
    bool                    has_focus() const;

    OUString                get_selected_text() const;

    weld::Widget*           identifier() const; // just to uniquely identify this widget

    /** initialize the view with the content of a folder given by URL, and apply an immediate filter

        @param rFolderURL
            the URL of the folder whose content is to be read
        @param rFilter
            the initial filter to be applied
        @param pAsyncDescriptor
            If not <NULL/>, this struct describes the parameters for doing the
            action asynchronously.
    */
    FileViewResult          Initialize(
                                const OUString& rFolderURL,
                                const OUString& rFilter,
                                const FileViewAsyncAction* pAsyncDescriptor,
                                const css::uno::Sequence< OUString >& rBlackList
                            );

    /** reads the current content of the current folder again, and applies the given filter to it

        Note 1: The folder is really read a second time. This implies that any new elements (which were
        not present when you called Initialize the last time) are now displayed.

        Note 2: This method must not be called when you previously initialized the view from a sequence
        of strings, or a UNO content object.

        @param rFilter
            the filter to be applied
        @param pAsyncDescriptor
            If not <NULL/>, this struct describes the parameters for doing the
            action asynchronously.
    */
    FileViewResult          ExecuteFilter(
                                const OUString& rFilter,
                                const FileViewAsyncAction* pAsyncDescriptor
                            );

    /** cancels a running async action (if any)

        @seealso Initialize
        @seealso ExecuteFilter
        @seealso FileViewAsyncAction
    */
    void                    CancelRunningAsyncAction();

    /** initializes the view with the parent folder of the current folder

        @param rNewURL
            the URL of the folder which we just navigated to
        @param pAsyncDescriptor
            If not <NULL/>, this struct describes the parameters for doing the
            action asynchronously.
    */
    FileViewResult          PreviousLevel(
                                const FileViewAsyncAction* pAsyncDescriptor
                            );

    void                    SetNoSelection();

    void                    SetSelectHdl( const Link<SvtFileView*,void>& rHdl );
    void                    SetDoubleClickHdl( const Link<SvtFileView*,bool>& rHdl );
    void                    SetOpenDoneHdl( const Link<SvtFileView*,void>& rHdl );

    sal_uInt32              GetSelectionCount() const;
    SvtContentEntry*        FirstSelected() const;

    void selected_foreach(const std::function<bool(weld::TreeIter&)>& func);

    void                    EnableDelete( bool bEnable );

                            // save and load column size and sort order
    OUString                GetConfigString() const;
    void                    SetConfigString( const OUString& rCfgStr );

    void                    EndInplaceEditing();

    ::std::vector< SvtContentEntry > GetContent();
};

// struct SvtContentEntry ------------------------------------------------

struct SvtContentEntry
{
    bool     mbIsFolder;
    OUString maURL;

    SvtContentEntry( const OUString& rURL, bool bIsFolder ) :
        mbIsFolder( bIsFolder ), maURL( rURL ) {}
};

#endif // INCLUDED_VCL_FILEVIEW_HXX

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