textmisc.c

linux下的E_MAIL客户端源码

   userTrans.Trim();

   if ( userTrans.size() > 0 ) {

      if ( userTrans.StartsWith("#override") )
	 XtOverrideTranslations(text, XtParseTranslationTable(userTrans));
      else if ( userTrans.StartsWith("#augment") )
	 XtAugmentTranslations(text, XtParseTranslationTable(userTrans));
      else
	 XtVaSetValues(text, XmNtranslations,
		       XtParseTranslationTable(userTrans), NULL);
   }

   return text;

} // End CreateText

/*--------------------------------------------------------------------------
 *  Set Text widget from character array
 */

void
TextSetString(Widget w, CharC c)
{
   if ( c.Length() == 0 ) {
      if ( XmIsTextField(w) ) XmTextFieldSetString(w, "");
      else		      XmTextSetString(w, "");
      return;
   }

//
// Use the existing string if possible
//
   if ( c.FollowedByNull() ) {
      if ( XmIsTextField(w) ) XmTextFieldSetString(w, (char*)c.Addr());
      else		      XmTextSetString(w, (char*)c.Addr());
      return;
   }

//
// Use the internal buffer if possible
//
   if ( c.Length() <= BUFLEN ) {
      strncpy(buffer, c.Addr(), c.Length());
      buffer[c.Length()] = 0;
      if ( XmIsTextField(w) ) XmTextFieldSetString(w, buffer);
      else		      XmTextSetString(w, buffer);
      return;
   }

//
// If we reached this point, we will try to write the data to a
//   temporary file so we can null-terminate it.
//
   Boolean	error = False;
   char	*tmpFile = tempnam(NULL, NULL);
   if ( !tmpFile ) error = True;

//
// Open the file
//
   int	fd;
   if ( !error ) {
      fd = open(tmpFile, O_RDWR|O_CREAT|O_TRUNC, 0600);
      if ( fd < 0 ) {
	 free(tmpFile);
	 error = True;
      }
   }

//
// Write the file and the null
//
   if ( !error ) {
      if ( !c.WriteFile(fd) || write(fd, &null, 1) != 1 ) {
	 unlink(tmpFile);
	 free(tmpFile);
	 error = True;
      }
      close(fd);
   }

//
// Map the file
//
   MappedFileC	*mf;
   if ( !error ) {
      mf = MapFile(tmpFile);
      if ( !mf ) {
	 unlink(tmpFile);
	 free(tmpFile);
	 error = True;
      }
   }

//
// Use the data from the mapped file
//
   if ( !error ) {
      if ( XmIsTextField(w) ) XmTextFieldSetString(w, (char*)mf->Addr());
      else		      XmTextSetString(w, (char*)mf->Addr());
      UnmapFile(mf);
      unlink(tmpFile);
      free(tmpFile);
      return;
   }

//
// If we reached this point, we have to use the 1K at a time method
//
   if ( XmIsText(w) ) XmTextDisableRedisplay(w);

   if ( XmIsTextField(w) ) XmTextFieldSetString(w, "");
   else			   XmTextSetString(w, "");

   const char	*str = c.Addr();
   int		rem = c.Length();
   while ( rem > 0 ) {
      int	len = MIN(rem, BUFLEN);
      strncpy(buffer, str, len);
      buffer[len] = 0;
      if ( XmIsTextField(w) )
	 XmTextFieldInsert(w, XmTextGetLastPosition(w), buffer);
      else
	 XmTextInsert(w, XmTextGetLastPosition(w), buffer);
      str += len;
      rem -= len;
   }

   if ( XmIsTextField(w) ) XmTextFieldShowPosition(w, 0);
   else			   XmTextShowPosition(w, 0);
   if ( XmIsText(w) ) XmTextEnableRedisplay(w);

} // End TextSetString

/*--------------------------------------------------------------------------
 *  Insert character array in text widget
 */

void
TextInsert(Widget w, XmTextPosition pos, CharC c)
{
   if ( c.Length() == 0 ) return;

//
// Use the existing string if possible
//
   if ( c.FollowedByNull() ) {
      if ( XmIsTextField(w) ) XmTextFieldInsert(w, pos, (char*)c.Addr());
      else		      XmTextInsert(w, pos, (char*)c.Addr());
      return;
   }

//
// Use the internal buffer if possible
//
   if ( c.Length() <= BUFLEN ) {
      strncpy(buffer, c.Addr(), c.Length());
      buffer[c.Length()] = 0;
      if ( XmIsTextField(w) ) XmTextFieldInsert(w, pos, buffer);
      else		      XmTextInsert(w, pos, buffer);
      return;
   }

//
// If we reached this point, we will try to write the data to a
//   temporary file so we can null-terminate it.
//
   Boolean	error = False;
   char	*tmpFile = tempnam(NULL, NULL);
   if ( !tmpFile ) error = True;

//
// Open the file
//
   int	fd;
   if ( !error ) {
      fd = open(tmpFile, O_RDWR|O_CREAT|O_TRUNC, 0600);
      if ( fd < 0 ) {
	 free(tmpFile);
	 error = True;
      }
   }

//
// Write the file and the null
//
   if ( !error ) {
      if ( !c.WriteFile(fd) || write(fd, &null, 1) != 1 ) {
	 unlink(tmpFile);
	 free(tmpFile);
	 error = True;
      }
      close(fd);
   }

//
// Map the file
//
   MappedFileC	*mf;
   if ( !error ) {
      mf = MapFile(tmpFile);
      if ( !mf ) {
	 unlink(tmpFile);
	 free(tmpFile);
	 error = True;
      }
   }

//
// Use the data from the mapped file
//
   if ( !error ) {
      if ( XmIsTextField(w) ) XmTextFieldInsert(w, pos, (char*)mf->Addr());
      else		      XmTextInsert(w, pos, (char*)mf->Addr());
      UnmapFile(mf);
      unlink(tmpFile);
      free(tmpFile);
      return;
   }

//
// If we reached this point, we have to use the 1K at a time method
//
   if ( XmIsText(w) ) XmTextDisableRedisplay(w);

   const char	*str = c.Addr();
   int		rem = c.Length();
   while ( rem > 0 ) {
      int	len = MIN(rem, BUFLEN);
      strncpy(buffer, str, len);
      buffer[len] = 0;
      if ( XmIsTextField(w) ) XmTextFieldInsert(w, pos, buffer);
      else		      XmTextInsert(w, pos, buffer);
      pos += len;
      str += len;
      rem -= len;
   }

   if ( XmIsText(w) ) XmTextEnableRedisplay(w);

} // End TextInsert

/*--------------------------------------------------------------------------
 *  Set Text widget from string list
 */

void
TextSetList(Widget w, const StringListC& list)
{
   StringC	tmp;
   unsigned	count = list.size();
   for (int i=0; i<count; i++) {
      if ( i > 0 ) tmp += '\n';
      tmp += *list[i];
   }

   XmTextSetString(w, tmp);

} // End TextSetList

/*--------------------------------------------------------------------------
 *  Set string list from text widget
 */

void
TextGetList(Widget w, StringListC& list)
{
   char		*cs = XmTextGetString(w);
   CharC	src(cs);

   StringC	tmp;
   u_int	offset = 0;
   CharC	entry = src.NextWord(offset, "\n");
   while ( entry.Length() > 0 ) {
      tmp = entry;
      list.add(tmp);
      offset = entry.Addr() - src.Addr() + 1;
      entry = src.NextWord(offset, "\n");
   }

   XtFree(cs);

} // End TextSetList