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**
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** GNU Lesser General Public License Usage
**
** Alternatively, 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
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#include "cpprefactoringchanges.h"

#include <cpptools/cppcodeformatter.h>
#include <texteditor/texteditorsettings.h>
#include <texteditor/tabsettings.h>

#include <QtGui/QTextBlock>

using namespace CppEditor;
using namespace CPlusPlus;

CppRefactoringChanges::CppRefactoringChanges(const Document::Ptr &thisDocument, const Snapshot &snapshot)
    : m_thisDocument(thisDocument)
    , m_snapshot(snapshot)
    , m_context(m_thisDocument, m_snapshot)
    , m_modelManager(CppTools::CppModelManagerInterface::instance())
{
    Q_ASSERT(m_modelManager);
    m_workingCopy = m_modelManager->workingCopy();
}

Document::Ptr CppRefactoringChanges::thisDocument() const
{
    return m_thisDocument;
}

const Snapshot &CppRefactoringChanges::snapshot() const
{
    return m_snapshot;
}

const LookupContext &CppRefactoringChanges::context() const
{
    return m_context;
}

QStringList CppRefactoringChanges::apply()
{
    const QStringList changedFiles = TextEditor::RefactoringChanges::apply();
    m_modelManager->updateSourceFiles(changedFiles);
    return changedFiles;
}

Document::Ptr CppRefactoringChanges::document(const QString &fileName) const
{
    QString source;
    unsigned editorRevision = 0;
    QDateTime lastModified;

    if (m_workingCopy.contains(fileName)) {
        const QPair<QString, unsigned> workingCopy = m_workingCopy.get(fileName);
        source = workingCopy.first;
        editorRevision = workingCopy.second;
    } else {
        QFile file(fileName);
        if (! file.open(QFile::ReadOnly))
            return Document::Ptr();

        lastModified = QFileInfo(file).lastModified();
        source = QTextStream(&file).readAll(); // ### FIXME read bytes, and remove the convert below
        file.close();
    }

    const QByteArray contents = m_snapshot.preprocessedCode(source, fileName);
    Document::Ptr doc = m_snapshot.documentFromSource(contents, fileName);

    if (lastModified.isValid())
        doc->setLastModified(lastModified);
    else
        doc->setEditorRevision(editorRevision);
    doc->check();

    return doc;
}

void CppRefactoringChanges::indentSelection(const QTextCursor &selection) const
{
    // ### shares code with CPPEditor::indent()
    QTextDocument *doc = selection.document();

    QTextBlock block = doc->findBlock(selection.selectionStart());
    const QTextBlock end = doc->findBlock(selection.selectionEnd()).next();

    const TextEditor::TabSettings &tabSettings(TextEditor::TextEditorSettings::instance()->tabSettings());
    CppTools::QtStyleCodeFormatter codeFormatter;
    codeFormatter.updateStateUntil(block);

    do {
        tabSettings.indentLine(block, codeFormatter.indentFor(block));
        codeFormatter.updateLineStateChange(block);
        block = block.next();
    } while (block.isValid() && block != end);
}