CMD/CMD_Source.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Mark Elendt
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        CMD library (C++)
 *
 * COMMENTS:    A source for commands
 *
 */

#ifndef __CMD_Source_h__
#define __CMD_Source_h__

#include "CMD_API.h"
#include <iostream.h>
#include <UT/UT_PtrArray.h>
#include <UT/UT_StringArray.h>

#define CMD_MAX_IF_NESTS        128

class UT_WorkBuffer;
class FS_Reader;
class CMD_VariableTable;
class CMD_HistoryTable;
class CMD_Manager;
class CMD_Loop;

enum CMD_IfState {
    CMD_IF_NOTVALID = 0,        // Not in an if statement
    CMD_IF_NOTDONE,             // Haven't found a true branch yet
    CMD_IF_DONE,                // We've completed the true branch
    CMD_IF_BYPASS,              // Nested if inside a false branch
    CMD_IF_DOING                // Doing the true branch
};

class CMD_API CMD_Source {
public:
     CMD_Source(const char *filename, int interactive = 0);
    ~CMD_Source();

    void                 addHistory(const char *cmd);
    CMD_VariableTable   *getLocalVariables()    { return  myVariables; }

    const char          *getFilename()          { return myFilename; }

    CMD_HistoryTable    *getHistory()           { return  myHistory; }

    CMD_IfState          getIfState()   { return myIfState[myIfNestLevel]; }
    void                 setIfState(CMD_IfState state)
                         {
                            myIfState[myIfNestLevel] = state;
                         }
    int                  bumpIfNest(int dir);
    const char          *getLine(UT_WorkBuffer &buf);
    int                  getLineNumber() const;
    int                  getIfNestLevel() const         { return myIfNestLevel;}
    void                 setIfNestLevel(int l)          { myIfNestLevel = l; }
    void                 setEchoState(int onoff)        { myEchoState = onoff; }
    int                  getEchoState() const           { return myEchoState; }

    // Returns true if this source is stdin
    bool                 isStdIn() const;

    int                  doIfStatements()
                         {
                            return getIfState() == CMD_IF_NOTVALID ||
                                   getIfState() == CMD_IF_DOING;
                         }
    UT_IStream          *getInputStream() { return myInput; }
    void                 pushUnfinishedCommands(const char *);
    bool                 hasUnfinishedCommands();
    void                 startBlock();
    void                 endBlock();

private:
    void                 initCommon(const char *filename);
    void                 setInput(char *buffer, int buflen);

    CMD_VariableTable   *myVariables;
    CMD_HistoryTable    *myHistory;
    char                *myFilename;
    CMD_Loop            *myCurrentLoop;
    UT_IStream          *myInput;
    char                *myBuffer;
    int                  myLoopStatus;
    int                  myIsInteractive;
    int                  myLineNum;
    int                  myEchoState;
    CMD_IfState          myIfState[CMD_MAX_IF_NESTS];
    int                  myIfNestLevel;
    UT_StringArray       myUnfinishedCommands;

    friend class         CMD_Manager;
};

#endif

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