/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@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.
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**************************************************************************/

#include "qmljsindenter.h"

#include <qmljstools/qmljsqtstylecodeformatter.h>
#include <texteditor/tabsettings.h>

#include <QtCore/QChar>
#include <QtGui/QTextDocument>
#include <QtGui/QTextBlock>
#include <QtGui/QTextCursor>

using namespace QmlJSEditor;
using namespace Internal;

Indenter::Indenter()
{}

Indenter::~Indenter()
{}

bool Indenter::isElectricCharacter(const QChar &ch) const
{
    if (ch == QLatin1Char('{')
            || ch == QLatin1Char('}')
            || ch == QLatin1Char(']')
            || ch == QLatin1Char(':'))
        return true;
    return false;
}

void Indenter::indentBlock(QTextDocument *doc,
                           const QTextBlock &block,
                           const QChar &typedChar,
                           const TextEditor::TabSettings &tabSettings)
{
    Q_UNUSED(doc)

    QmlJSTools::CreatorCodeFormatter codeFormatter(tabSettings);

    codeFormatter.updateStateUntil(block);
    const int depth = codeFormatter.indentFor(block);
    if (depth == -1)
        return;

    if (isElectricCharacter(typedChar)) {
        // only reindent the current line when typing electric characters if the
        // indent is the same it would be if the line were empty
        const int newlineIndent = codeFormatter.indentForNewLineAfter(block.previous());
        if (tabSettings.indentationColumn(block.text()) != newlineIndent)
            return;
    }

    tabSettings.indentLine(block, depth);
}

void Indenter::invalidateCache(QTextDocument *doc)
{
    QmlJSTools::CreatorCodeFormatter codeFormatter;
    codeFormatter.invalidateCache(doc);
}