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****************************************************************************/

/*
  location.h
*/

#ifndef LOCATION_H
#define LOCATION_H

#include <qstack.h>

#include "tr.h"

#define QDOC_QML

QT_BEGIN_NAMESPACE

class Config;
class QRegExp;

class Location
{
 public:
    Location();
    Location(const QString& filePath);
    Location(const Location& other);
    ~Location() { delete stk; }

    Location& operator=(const Location& other);

    void start();
    void advance(QChar ch);
    void advanceLines(int n) { stkTop->lineNo += n; stkTop->columnNo = 1; }

    void push(const QString& filePath);
    void pop();
    void setEtc(bool etc) { etcetera = etc; }
    void setLineNo(int no) { stkTop->lineNo = no; }
    void setColumnNo(int no) { stkTop->columnNo = no; }

    bool isEmpty() const { return stkDepth == 0; }
    int depth() const { return stkDepth; }
    const QString& filePath() const { return stkTop->filePath; }
    QString fileName() const;
    int lineNo() const { return stkTop->lineNo; }
    int columnNo() const { return stkTop->columnNo; }
    bool etc() const { return etcetera; }
    void warning(const QString& message, 
                 const QString& details = QString()) const;
    void error(const QString& message, 
               const QString& details = QString()) const;
    void fatal(const QString& message, 
               const QString& details = QString()) const;

    QT_STATIC_CONST Location null;

    static void initialize(const Config& config);
    static void terminate();
    static void information(const QString& message);
    static void internalError(const QString& hint);

 private:
    enum MessageType { Warning, Error };

    struct StackEntry
    {
	QString filePath;
	int lineNo;
	int columnNo;
    };

    void emitMessage(MessageType type, 
                     const QString& message,
                     const QString& details) const;
    QString toString() const;
    QString top() const;

 private:
    StackEntry stkBottom;
    QStack<StackEntry> *stk;
    StackEntry *stkTop;
    int stkDepth;
    bool etcetera;

    static int tabSize;
    static QString programName;
    static QRegExp *spuriousRegExp;
};

QT_END_NAMESPACE

#endif
