qt-creator/src/libs/cplusplus/ASTPath.cpp

/**************************************************************************
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** This file is part of Qt Creator
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** GNU Lesser General Public License Usage
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** 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
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#include "ASTPath.h"

#include <AST.h>
#include <TranslationUnit.h>

#ifdef DEBUG_AST_PATH
#  include <QtCore/QDebug>
#  include <typeinfo>
#endif // DEBUG_AST_PATH

using namespace CPlusPlus;

QList<AST *> ASTPath::operator()(int line, int column)
{
    _nodes.clear();
    _line = line + 1;
    _column = column + 1;

    if (_doc) {
        if (TranslationUnit *unit = _doc->translationUnit())
            accept(unit->ast());
    }

    return _nodes;
}

#ifdef DEBUG_AST_PATH
void ASTPath::dump(const QList<AST *> nodes)
{
    qDebug() << "ASTPath dump," << nodes.size() << "nodes:";
    for (int i = 0; i < nodes.size(); ++i)
        qDebug() << qPrintable(QString(i + 1, QLatin1Char('-'))) << typeid(*nodes.at(i)).name();
}
#endif // DEBUG_AST_PATH

bool ASTPath::preVisit(AST *ast)
{
    unsigned firstToken = ast->firstToken();
    unsigned lastToken = ast->lastToken();

    if (firstToken > 0) {
        Q_ASSERT(lastToken > firstToken);

        unsigned startLine, startColumn;
        getTokenStartPosition(firstToken, &startLine, &startColumn);

        if (_line > startLine || (_line == startLine && _column >= startColumn)) {

            unsigned endLine, endColumn;
            getTokenEndPosition(lastToken - 1, &endLine, &endColumn);

            if (_line < endLine || (_line == endLine && _column <= endColumn)) {
                _nodes.append(ast);
                return true;
            }
        }
    }

    return false;
}