_EdGetEnv( ) API Library Routine

Artículo
06/18/2008

_EdGetEnv( ) provides the editor environment information in *EDENV.

int _EdGetEnv(WHANDLE wh, *EDENV theEdEnv)
WHANDLE wh;            /* Handle of editing window. */
*EDENV theEdEnv;         /* Environment settings. */

Remarks

The structure of *EDENV is listed below.

Note

In the comments below, an (R) indicates that this member is read-only and can't be set using _EdSetEnv( ). A (B) indicates that this member takes on one of two Boolean values: 1 (True) or 0 (False).

typedef struct
{
   char            filename[MAXFILENAME];   // (R)
   EDPOS         length;         // # of bytes in text. (R)
   unsigned short   lenLimit;         // Max allowable length.
 0 = infinite.

   unsigned short   dirty,            // Has the file been changed?
 (R, B)
                  autoIndent,      // Auto indent? (B)
                  backup,         // Make backup files? (B)
                  addLineFeeds,   // Add line feeds when saving? (B)
                  autoCompile,      // Shall we auto compile this thing?
 (B)
                  addCtrlZ,         // Add end of file ctrl-z? (B)
                  savePrefs,      // Save edit preferences? (B)
                  dragAndDrop,   // Allow drag-and-drop. (B)
                  readOnly,         // 0 = not r/o, 1 = file is r/o,
                                 // 2 = file is r/w, opened r/o,
                                 // 3 = file is r/o, opened r/o. (R)
                  status,            // Display status bar? (B)
                  lockPrefs,         // Can update the preferences ? (B)
                  insertMode;      // (B)

   short            wrap;            // If < 0, new line at Return only.
   EDPOS         selStart;         // Selection start. (R)
   EDPOS         selEnd;         // Selection end. (R)
   EDPOS         selAnchor;      // Selection anchor point. (R)
   short            justMode;      // Justification (0 = left, 1 =
 right, 2 = center).
   short            tabWidth;      // TAB size in spaces.

   char            fontName[MAXFONTNAME];
   short            fontSize;
   short            fontStyle;      // 0 = plain, 1 = bold, 2 =
 italic, 3 = bold italic.
   short            kind;         // Kind of editor session (R);
                              // EDCOMMAND, EDPROGRAM, etc.
} EDENV;

1 is returned if called in a Command or Editor session, otherwise 0 is returned.

For more information on how to create an API library and integrate it with Visual FoxPro, see Accessing the Visual FoxPro API.

Example

The following example opens an editing session for a file specified by a parameter and displays each field of the EDENV structure for that file as returned by _EdGetEnv( ).

Visual FoxPro Code

SET LIBRARY TO EDGETENV
= EDGETENV("x")

C Code

#include <pro_ext.h>

void putLong(unsigned long n)
{
   Value val;

   val.ev_type = 'I';
   val.ev_long = n;
   val.ev_width = 6;

   _PutValue(&val);
}

FAR Example(ParamBlk FAR *parm)
{
#define pFILENAME ((char FAR *) _HandToPtr(parm->p[0].val.ev_handle))

   WHANDLE wh;
   EDENV EdEnv;
   EDPOS edpos;

   if (!_SetHandSize(parm->p[0].val.ev_handle,
      parm->p[0].val.ev_length+1))
   {
      _Error(182); // "Insufficient memory"
   }
   pFILENAME[parm->p[0].val.ev_length] = '\0';

   _HLock(parm->p[0].val.ev_handle);
   wh = _EdOpenFile(pFILENAME, FO_READONLY);
   _HUnLock(parm->p[0].val.ev_handle);

   _EdGetEnv(wh, &EdEnv);

   _PutStr("\nfilename: ");    _PutStr(EdEnv.filename);
   _PutStr("\nlength: ");    putLong(EdEnv.length);
   _PutStr("\nlenLimit: ");    putLong(EdEnv.lenLimit);
   _PutStr("\ndirty: ");     putLong(EdEnv.dirty);
   _PutStr("\nautoIndent: ");  putLong(EdEnv.autoIndent);
   _PutStr("\nbackup: ");    putLong(EdEnv.backup);
   _PutStr("\naddLineFeeds: ");  putLong(EdEnv.addLineFeeds);
   _PutStr("\nautoCompile: ");   putLong(EdEnv.autoCompile);
   _PutStr("\naddCtrlZ: ");    putLong(EdEnv.addCtrlZ);
   _PutStr("\nsavePrefs: ");   putLong(EdEnv.savePrefs);
   _PutStr("\ndragAndDrop: ");   putLong(EdEnv.dragAndDrop);
   _PutStr("\nreadOnly: ");    putLong(EdEnv.readOnly);
   _PutStr("\nstatus: ");    putLong(EdEnv.status);
   _PutStr("\nlockPrefs: ");   putLong(EdEnv.lockPrefs);
   _PutStr("\ninsertMode: ");  putLong(EdEnv.insertMode);
   _PutStr("\nwrap: ");    putLong(EdEnv.wrap);
   _PutStr("\nselStart: ");    putLong(EdEnv.selStart);
   _PutStr("\nselEnd: ");    putLong(EdEnv.selEnd);
   _PutStr("\nselAnchor: ");   putLong(EdEnv.selAnchor);
   _PutStr("\njustMode: ");    putLong(EdEnv.justMode);
   _PutStr("\ntabWidth: ");    putLong(EdEnv.tabWidth);
   _PutStr("\nfontName: ");    _PutStr(EdEnv.fontName);
   _PutStr("\nfontSize: ");    putLong(EdEnv.fontSize);
   _PutStr("\nfontStyle: ");   putLong(EdEnv.fontStyle);
   _PutStr("\nkind: ");    putLong(EdEnv.kind);
}

FoxInfo myFoxInfo[] = {
   {"EDGETENV", (FPFI) Example, 1, "C"},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

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_EdGetEnv( ) API Library Routine

Remarks

Example

Visual FoxPro Code

C Code

See Also

Reference

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