/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at info@qt.nokia.com.
**
**************************************************************************/

#include "normalindenter.h"
#include "tabsettings.h"
#include "basetexteditor.h"

#include <QtGui/QTextDocument>

using namespace TextEditor;

NormalIndenter::NormalIndenter()
{}

NormalIndenter::~NormalIndenter()
{}

// Indent a text block based on previous line.
// Simple text paragraph layout:
// aaaa aaaa
//
//   bbb bb
//   bbb bb
//
//  - list
//    list line2
//
//  - listn
//
// ccc
//
// @todo{Add formatting to wrap paragraphs. This requires some
// hoops as the current indentation routines are not prepared
// for additional block being inserted. It might be possible
// to do in 2 steps (indenting/wrapping)}
//
void NormalIndenter::indentBlock(QTextDocument *doc,
                                 const QTextBlock &block,
                                 const QChar &typedChar,
                                 BaseTextEditorWidget *editor)
{
    Q_UNUSED(typedChar)

    // At beginning: Leave as is.
    if (block == doc->begin())
        return;

    const QTextBlock previous = block.previous();
    const QString previousText = previous.text();
    // Empty line indicates a start of a new paragraph. Leave as is.
    if (previousText.isEmpty() || previousText.trimmed().isEmpty())
        return;

    // Just use previous line.
    // Skip blank characters when determining the indentation
    const TabSettings &ts = editor->tabSettings();
    int i = 0;
    while (i < previousText.size()) {
        if (!previousText.at(i).isSpace()) {
            ts.indentLine(block, ts.columnAt(previousText, i));
            break;
        }
        ++i;
    }
}