Fossil

@       eval $sb set $xview
@     } else {
@       grid remove $sb
@     }
@   }
@   enableSync x
@ }
@
@ proc sync-y {first last} {
@   disableSync y
@   foreach c [cols] {
@     $c yview moveto $first
@   }
@   if {$first > 0 || $last < 1} {
@     grid .sby
@     .sby set $first $last
@   } else {
@     grid remove .sby
@   }
@   enableSync y
@ }
@ 
@ wm withdraw .
@ wm title . $CFG(TITLE)
@ wm iconname . $CFG(TITLE)
@ bind . <q> exit
@ bind . <Destroy> {after 0 exit}
@ bind . <Tab> {cycleDiffs; break}
@ bind . <<PrevWindow>> {cycleDiffs 1; break}
@ bind . <Return> {
@   event generate .files <1>
@   event generate .files <ButtonRelease-1>
@   break
@ }

@ wm deiconify .
;

/*
** Show diff output in a Tcl/Tk window, in response to the --tk option
** to the diff command.
** 
** If fossil has direct access to a Tcl interpreter (either loaded
** dynamically through stubs or linked in statically), we can use it
** directly. Otherwise:
** (1) Write the Tcl/Tk script used for rendering into a temp file.
** (2) Invoke "tclsh" on the temp file using fossil_system().
** (3) Delete the temp file.
*/
void diff_tk(const char *zSubCmd, int firstArg){
  int i;
  Blob script;
  char *zTempFile = 0;
  char *zCmd;

    shell_escape(&script, z);
  }
  blob_appendf(&script, "}\n%s", zDiffScript);
  if( zTempFile ){
    blob_write_to_file(&script, zTempFile);
    fossil_print("To see diff, run: tclsh \"%s\"\n", zTempFile);
  }else{
#if defined(FOSSIL_ENABLE_TCL)
    Th_FossilInit(TH_INIT_DEFAULT);
    if( evaluateTclWithEvents(g.interp, &g.tcl, blob_str(&script),
                              blob_size(&script), 1)==TCL_OK ){
      blob_reset(&script);
      return;
    }
    /*
     * If evaluation of the Tcl script fails, the reason may be that Tk
     * could not be found by the loaded Tcl, or that Tcl cannot be loaded
     * dynamically (e.g. x64 Tcl with x86 Fossil).  Therefore, fallback
     * to using the external "tclsh", if available.
     */
#endif
    zTempFile = write_blob_to_temp_file(&script);
    zCmd = mprintf("tclsh \"%s\"", zTempFile);
    fossil_system(zCmd);
    file_delete(zTempFile);
    fossil_free(zCmd);
  }
  blob_reset(&script);

*/
int th_register_language(Th_Interp *interp);            /* th_lang.c */
int th_register_sqlite(Th_Interp *interp);              /* th_sqlite.c */
int th_register_vfs(Th_Interp *interp);                 /* th_vfs.c */
int th_register_testvfs(Th_Interp *interp);             /* th_testvfs.c */

#ifdef FOSSIL_ENABLE_TCL
/*
** Interfaces to the full Tcl core library from "th_tcl.c".
*/
int th_register_tcl(Th_Interp *, void *);
int unloadTcl(Th_Interp *, void *);
int evaluateTclWithEvents(Th_Interp *, void *, const char *, int, int);
#endif

/*
** General purpose hash table from th_lang.c.
*/
typedef struct Th_Hash      Th_Hash;
typedef struct Th_HashEntry Th_HashEntry;

    if( !resultObjPtr ){
      rc = TCL_ERROR;
    }
  }
  Tcl_DecrRefCount(listPtr);
  return rc;
}

/*
** Evaluate a Tcl script, creating the Tcl interpreter if necessary. If the
** Tcl script succeeds, start a Tcl event loop until there are no more events
** remaining to process -OR- the script calls [exit].  If the bWait argument
** is zero, only process events that are already in the queue; otherwise,
** process events until the script terminates the Tcl event loop.
*/
int evaluateTclWithEvents(
  Th_Interp *interp,
  void *pContext,
  const char *zScript,
  int nScript,
  int bWait
){
  struct TclContext *tclContext = (struct TclContext *)pContext;
  Tcl_Interp *tclInterp;
  int rc;
  int flags = TCL_ALL_EVENTS;

  if( createTclInterp(interp, pContext)!=TH_OK ){
    return TH_ERROR;
  }
  tclInterp = tclContext->interp;
  rc = Tcl_EvalEx(tclInterp, zScript, nScript, TCL_EVAL_GLOBAL);
  if( rc!=TCL_OK ) return rc;
  if( !bWait ) flags |= TCL_DONT_WAIT;
  while( Tcl_DoOneEvent(flags) ){
    /* do nothing */
  }
  return rc;
}

/*
** Creates and initializes a Tcl interpreter for use with the specified TH1
** interpreter.  Stores the created Tcl interpreter in the Tcl context supplied
** by the caller.
*/
static int createTclInterp(