_EdRevert( ) API Library Routine

JavaScript Editor js editor     Web development 



Main Page

Discards all changes made to the file displaying in the specified editing window since it was most recently saved with _EdSave(В ).

void _EdRevert(WHANDLE wh)
WHANDLE wh;            /* Handle of editing window. */

Example

The following example opens for editing a file specified by a parameter. After some editing, insertion of a new line, indenting of two lines, and deletion of two lines, the changes are discarded using _EdRevert(В ).

Visual FoxPro Code

В Copy Code
SET LIBRARY TO EDREVERT
= EDREVERT("x")

C Code

В Copy Code
#include <pro_ext.h>

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

   WHANDLE wh;

   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_READWRITE);
   _HUnLock(parm->p[0].val.ev_handle);

   _EdSetPos(wh, _EdGetLinePos(wh, 13));
   _EdInsert(wh, "Hello, world\r\n", _StrLen("Hello, world\n"));

   _EdSelect(wh, _EdGetLinePos(wh, 14), _EdGetLinePos(wh, 16));
   _EdIndent(wh, 1);

   _EdSelect(wh, _EdGetLinePos(wh, 9), _EdGetLinePos(wh, 12));
   _EdDelete(wh);

   _EdRevert(wh);
}

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

See Also



JavaScript Editor js editor     Web development