FS/UT_PathFile.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:
 *      Ramin Kamal
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        UT_PathFile.h (Utility Library, C++)
 *
 * COMMENTS:
 *              This class is used to look for files using searchpaths. 
 *              It has mechanisms for patternmatching, finding only the
 *              file that's highest in the searchpath, or combining them
 *              all, and so on. The way it searches for files is also
 *              special. Check out the .C file for more docs on that.
 */

#ifndef __UT_PathFile__
#define __UT_PathFile__

#include "FS_API.h"
#include <UT/UT_Defines.h>
#include <UT/UT_String.h>
#include <UT/UT_PtrArray.h>

class UT_PathSearch;
class UT_PathFileInfo;
class FS_Reader;

#define UT_NOSAVE_HINT ".nosave"
#define UT_HIDE_HINT ".hide"
#define UT_APPEND_HINT ".append"

typedef int (*fs_path_compare_func_t)(UT_PathFileInfo *const*, UT_PathFileInfo *const*);

class FS_API UT_PathFile
{
public:
                         UT_PathFile();
    virtual             ~UT_PathFile();


    // You should call these three at least once before using this class
    void                 setSearchPath(int path_id, const char *pattern);

    // Then you should call this method (or some subclass' equivalent)
    void                 applyStandardFilter();


    const char          *getSearchPattern()     { return mySearchPattern; }

    const char          *getDefaultDir()        { return myDefaultDir; }
    int                  getDefaultDirIndex()   { return myDefaultDirIndex; }
    int                  getHomeDirIndex()      { return myHomeIndex; }


    // This is the simplest method of using this class, it just streams you
    // all the lines in all the files that match your search.
    bool                 getLine(UT_WorkBuffer &wbuf);

    // Some query methods for getting info about the current line of input
    int                  getCurrentLineNumber() { return myCurrentLineNumber; }
    const char          *getCurrentFileName();


    // Query methods for getting at the directory list.
    // NOTE: getDir() indexes from the end of the list!
    int                  getDirCount() const;
    const char          *getDir(int i) const;

    // if you set the filtered flag to zero, then you'll get all the matching
    // files in the search path. ie hidden ones, overridden ones, etc
    int                  getFileInfoCount(int filtered=1) const;
    UT_PathFileInfo     *getFileInfo(int i, int filtered=1) const;
    void                 appendFileInfo(UT_PathFileInfo *info)
                            { myFileInfos.append(info); }

    // note: no deleting done
    void                 clearFileInfoList() { myFileInfos.entries(0); }
    

    void                 sortFileInfos(int (*compare)(UT_PathFileInfo *const*t1,
                                                      UT_PathFileInfo *const*t2));

    virtual UT_PathFileInfo *createFileInfo();
    UT_PathFileInfo     *appendFileInfo(const char *fullpath, int level);
    void                 removeFileInfo(int i); // NOT filtered
    void                 removeFileInfo(UT_PathFileInfo *);
    void                 removeFileInfo(const char *fullpath);

protected:
    // note: this is quite different from clearFileInfoList above
    void                 clearFileList();
    void                 computeFileList();

    void                 addMatchingFiles(char *fullpattern, int level);
    void                 removeMatchingFiles(char *fullpattern, int level);

    unsigned int         myBusyFlag:1,
                         myFilesFoundFlag:1;
private:
    void                 computeDefaultDir();
    const UT_PathSearch *myPathSearch;
    UT_String            mySearchPattern;
    UT_String            myDefaultDir;
    int                  myDefaultDirIndex;
    int                  myHomeIndex;
    int                  myCurrentFileIndex;
    int                  myCurrentLineNumber;

    UT_PtrArray<UT_PathFileInfo *>       myFileInfos;

    FS_Reader           *myFile;
    friend int           utAddMatchingFiles(const char *file, void *data);
    friend int           utRemoveMatchingFiles(const char *file, void *data);
};

FS_API extern bool UTfindPreferenceFile( int path_id,
                                         const char *filename,
                                         UT_String &result,
                                         bool &no_save);


#endif

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