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helpbase.h

Go to the documentation of this file.

/*
 * helpbase.h
 *
 * Turbo Vision - Version 2.0
 *
 * Copyright (c) 1994 by Borland International
 * All Rights Reserved.
 *
 * Modified by Sergio Sigala <sergio@sigala.it>
 */

const long magicHeader = 0x46484246L; //"FBHF"

#define cHelpViewer "\x06\x07\x08"
#define cHelpWindow "\x80\x81\x82\x83\x84\x85\x86\x87"

// TParagraph

class TParagraph
{
public:
    TParagraph() {}
    TParagraph *next;
    Boolean wrap;
    ushort size;
    char *text;
};

// TCrossRef

class TCrossRef
{
public:
    TCrossRef() {}
    int ref;
    int offset;
    uchar length;
};

typedef void (*TCrossRefHandler) ( opstream&, int );

class THelpTopic: public TObject, public TStreamable
{
public:
    THelpTopic();
    THelpTopic( StreamableInit ) {};
    virtual ~THelpTopic();
    void addCrossRef( TCrossRef ref );
    void addParagraph( TParagraph *p );
    void getCrossRef( int i, TPoint& loc, uchar& length, int& ref );
    char *getLine( int line, char *buffer, int buflen );
    int getNumCrossRefs();
    int numLines();
    void setCrossRef( int i, TCrossRef& ref );
    void setNumCrossRefs( int i );
    void setWidth( int aWidth );
    TParagraph *paragraphs;
    int numRefs;
    TCrossRef *crossRefs;
private:
    char *wrapText( char *text, int size, int& offset, Boolean wrap, char *lineBuf, int lineBufLen );
    void readParagraphs( ipstream& s );
    void readCrossRefs( ipstream& s );
    void writeParagraphs( opstream& s );
    void writeCrossRefs( opstream& s );
    void disposeParagraphs();
    const char *streamableName() const
        { return name; }
    int width;
    int lastOffset;
    int lastLine;
    TParagraph *lastParagraph;
protected:
    virtual void write( opstream& os );
    virtual void *read( ipstream& is );
public:
    static const char * const name;
    static TStreamable *build();
};

inline ipstream& operator >> ( ipstream& is, THelpTopic& cl )
    { return is >> (TStreamable&)cl; }
inline ipstream& operator >> ( ipstream& is, THelpTopic*& cl )
    { return is >> (void *&)cl; }

inline opstream& operator << ( opstream& os, THelpTopic& cl )
    { return os << (TStreamable&)cl; }
inline opstream& operator << ( opstream& os, THelpTopic* cl )
    { return os << (TStreamable *)cl; }


// THelpIndex

class THelpIndex : public TObject, public TStreamable
{
public:
    THelpIndex();
    THelpIndex( StreamableInit ) {};
    virtual ~THelpIndex();
    long position( int );
    void add( int, long );
    ushort size;
    long *index;
private:
    const char *streamableName() const
        { return name; }
protected:
    virtual void write( opstream& os );
    virtual void *read( ipstream& is );
public:
    static const char * const name;
    static TStreamable *build();
};

inline ipstream& operator >> ( ipstream& is, THelpIndex& cl )
    { return is >> (TStreamable&)cl; }
inline ipstream& operator >> ( ipstream& is, THelpIndex*& cl )
    { return is >> (void *&)cl; }

inline opstream& operator << ( opstream& os, THelpIndex& cl )
    { return os << (TStreamable&)cl; }
inline opstream& operator << ( opstream& os, THelpIndex* cl )
    { return os << (TStreamable *)cl; }


// THelpFile

class THelpFile : public TObject
{
    static const char * invalidContext;
public:
    THelpFile( fpstream& s );
    virtual ~THelpFile();
    THelpTopic *getTopic( int );
    THelpTopic *invalidTopic();
    void recordPositionInIndex( int );
    void putTopic( THelpTopic* );
    fpstream *stream;
    Boolean modified;
    THelpIndex *index;
    long indexPos;
};

extern void notAssigned( opstream& s, int value );

extern TCrossRefHandler crossRefHandler;

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