/* -*- 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 .

 */

#include "textundo.hxx"

#include "textund2.hxx"

#include <strings.hrc>

#include <sal/log.hxx>

#include <utility>

#include <vcl/texteng.hxx>

#include <vcl/textview.hxx>

#include <vcl/textdata.hxx>

#include "textdoc.hxx"

#include "textdat2.hxx"

#include <svdata.hxx>

namespace

{

// Shorten() -- inserts ellipsis (...) in the middle of a long text

void Shorten (OUString& rString)

{

    auto const nLen = rString.getLength();

    if (nLen <= 48)

        return;

    // If possible, we don't break a word, hence first we look for a space.

    // Space before the ellipsis:

    auto iFirst = rString.lastIndexOf(' ', 32);

    if (iFirst == -1 || iFirst < 16)

        iFirst = 24; // not possible

    // Space after the ellipsis:

    auto iLast = rString.indexOf(' ', nLen - 16);

    if (iLast == -1 || iLast > nLen - 4)

        iLast = nLen - 8; // not possible

    // finally:

    rString =

        OUString::Concat(rString.subView(0, iFirst + 1)) +

        "..." +

        rString.subView(iLast);

}

} // namespace

TextUndoManager::TextUndoManager( TextEngine* p )

{

    mpTextEngine = p;

}

TextUndoManager::~TextUndoManager()

{

}

bool TextUndoManager::Undo()

{

    if ( GetUndoActionCount() == 0 )

        return false;

    UndoRedoStart();

    mpTextEngine->SetIsInUndo( true );

    bool bDone = SfxUndoManager::Undo();

    mpTextEngine->SetIsInUndo( false );

    UndoRedoEnd();

    return bDone;

}

bool TextUndoManager::Redo()

{

    if ( GetRedoActionCount() == 0 )

        return false;

    UndoRedoStart();

    mpTextEngine->SetIsInUndo( true );

    bool bDone = SfxUndoManager::Redo();

    mpTextEngine->SetIsInUndo( false );

    UndoRedoEnd();

    return bDone;

}

void TextUndoManager::UndoRedoStart()

{

    SAL_WARN_IF( !GetView(), "vcl", "Undo/Redo: Active View?" );

}

void TextUndoManager::UndoRedoEnd()

{

    if ( GetView() )

    {

        TextSelection aNewSel( GetView()->GetSelection() );

        aNewSel.GetStart() = aNewSel.GetEnd();

        GetView()->ImpSetSelection( aNewSel );

    }

    mpTextEngine->FormatAndUpdate( GetView() );

}

TextUndo::TextUndo( TextEngine* p )

{

    mpTextEngine = p;

}

TextUndo::~TextUndo()

{

}

OUString TextUndo::GetComment() const

{

    return OUString();

}

void TextUndo::SetSelection( const TextSelection& rSel )

{

    if ( GetView() )

        GetView()->ImpSetSelection( rSel );

}

TextUndoDelPara::TextUndoDelPara( TextEngine* pTextEngine, TextNode* pNode, sal_uInt32 nPara )

    : TextUndo( pTextEngine )

    , mbDelObject( true)

    , mnPara( nPara )

    , mpNode( pNode )

{

}

TextUndoDelPara::~TextUndoDelPara()

{

    if ( mbDelObject )

        delete mpNode;

}

void TextUndoDelPara::Undo()

{

    GetTextEngine()->InsertContent( std::unique_ptr<TextNode>(mpNode), mnPara );

    mbDelObject = false;    // belongs again to the engine

    if ( GetView() )

    {

        TextSelection aSel( TextPaM( mnPara, 0 ), TextPaM( mnPara, mpNode->GetText().getLength() ) );

        SetSelection( aSel );

    }

}

void TextUndoDelPara::Redo()

{

    auto & rDocNodes = GetDoc()->GetNodes();

    // pNode is not valid anymore in case an Undo joined paragraphs

    mpNode = rDocNodes[ mnPara ].get();

    GetTEParaPortions()->Remove( mnPara );

    // do not delete Node because of Undo!

    auto it = ::std::find_if( rDocNodes.begin(), rDocNodes.end(),

                              [&] (std::unique_ptr<TextNode> const & p) { return p.get() == mpNode; } );

    assert(it != rDocNodes.end());

    // coverity[leaked_storage : FALSE] - ownership transferred to this with mbDelObject

    it->release();

    GetDoc()->GetNodes().erase( it );

    GetTextEngine()->ImpParagraphRemoved( mnPara );

    mbDelObject = true; // belongs again to the Undo

    const sal_uInt32 nParas = static_cast<sal_uInt32>(GetDoc()->GetNodes().size());

    const sal_uInt32 n = mnPara < nParas ? mnPara : nParas-1;

    TextNode* pN = GetDoc()->GetNodes()[ n ].get();

    TextPaM aPaM( n, pN->GetText().getLength() );

    SetSelection( aPaM );

}

OUString TextUndoDelPara::GetComment () const

{

    return VclResId(STR_TEXTUNDO_DELPARA);

}

TextUndoConnectParas::TextUndoConnectParas( TextEngine* pTextEngine, sal_uInt32 nPara, sal_Int32 nPos )

    : TextUndo( pTextEngine )

    , mnPara( nPara )

    , mnSepPos( nPos )

{

}

TextUndoConnectParas::~TextUndoConnectParas()

{

}

void TextUndoConnectParas::Undo()

{

    TextPaM aPaM = GetTextEngine()->SplitContent( mnPara, mnSepPos );

    SetSelection( aPaM );

}

void TextUndoConnectParas::Redo()

{

    TextPaM aPaM = GetTextEngine()->ConnectContents( mnPara );

    SetSelection( aPaM );

}

OUString TextUndoConnectParas::GetComment () const

{

    return VclResId(STR_TEXTUNDO_CONNECTPARAS);

}

TextUndoSplitPara::TextUndoSplitPara( TextEngine* pTextEngine, sal_uInt32 nPara, sal_Int32 nPos )

    : TextUndo( pTextEngine )

    , mnPara( nPara )

    , mnSepPos ( nPos )

{

}

TextUndoSplitPara::~TextUndoSplitPara()

{

}

void TextUndoSplitPara::Undo()

{

    TextPaM aPaM = GetTextEngine()->ConnectContents( mnPara );

    SetSelection( aPaM );

}

void TextUndoSplitPara::Redo()

{

    TextPaM aPaM = GetTextEngine()->SplitContent( mnPara, mnSepPos );

    SetSelection( aPaM );

}

OUString TextUndoSplitPara::GetComment () const

{

    return VclResId(STR_TEXTUNDO_SPLITPARA);

}

TextUndoInsertChars::TextUndoInsertChars( TextEngine* pTextEngine, const TextPaM& rTextPaM, OUString aStr )

                    : TextUndo( pTextEngine ),

                        maTextPaM( rTextPaM ), maText(std::move( aStr ))

{

}

void TextUndoInsertChars::Undo()

{

    TextSelection aSel( maTextPaM, maTextPaM );

    aSel.GetEnd().GetIndex() += maText.getLength();

    TextPaM aPaM = GetTextEngine()->ImpDeleteText( aSel );

    SetSelection( aPaM );

}

void TextUndoInsertChars::Redo()

{

    TextSelection aSel( maTextPaM, maTextPaM );

    GetTextEngine()->ImpInsertText( aSel, maText );

    TextPaM aNewPaM( maTextPaM );

    aNewPaM.GetIndex() += maText.getLength();

    SetSelection( TextSelection( aSel.GetStart(), aNewPaM ) );

}

bool TextUndoInsertChars::Merge( SfxUndoAction* pNextAction )

{

    TextUndoInsertChars* pNext = dynamic_cast<TextUndoInsertChars*>(pNextAction);

    if ( !pNext )

        return false;

    if ( maTextPaM.GetPara() != pNext->maTextPaM.GetPara() )

        return false;

    if ( ( maTextPaM.GetIndex() + maText.getLength() ) == pNext->maTextPaM.GetIndex() )

    {

        maText += pNext->maText;

        return true;

    }

    return false;

}

OUString TextUndoInsertChars::GetComment () const

{

    // multiple lines?

    OUString sText(maText);

    Shorten(sText);

    return VclResId(STR_TEXTUNDO_INSERTCHARS).replaceAll("$1", sText);

}

TextUndoRemoveChars::TextUndoRemoveChars( TextEngine* pTextEngine, const TextPaM& rTextPaM, OUString aStr )

                    : TextUndo( pTextEngine ),

                        maTextPaM( rTextPaM ), maText(std::move( aStr ))

{

}

void TextUndoRemoveChars::Undo()

{

    TextSelection aSel( maTextPaM, maTextPaM );

    GetTextEngine()->ImpInsertText( aSel, maText );

    aSel.GetEnd().GetIndex() += maText.getLength();

    SetSelection( aSel );

}

void TextUndoRemoveChars::Redo()

{

    TextSelection aSel( maTextPaM, maTextPaM );

    aSel.GetEnd().GetIndex() += maText.getLength();

    TextPaM aPaM = GetTextEngine()->ImpDeleteText( aSel );

    SetSelection( aPaM );

}

OUString TextUndoRemoveChars::GetComment () const

{

    // multiple lines?

    OUString sText(maText);

    Shorten(sText);

    return VclResId(STR_TEXTUNDO_REMOVECHARS).replaceAll("$1", sText);

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */