(2006-08-06) rescue-bootcd

extra/syslinux-3.09/menu/libmenu/help.c

@@ -0,0 +1,84 @@
+/* -*- c -*- ------------------------------------------------------------- *
+ *   
+ *   Copyright 2004-2005 Murali Krishnan Ganapathy - All Rights Reserved
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ *   Boston MA 02111-1307, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include "help.h"
+#include <stdio.h>
+#include "string.h"
+
+char helpbasedir[HELPDIRLEN]; // name of help directory limited to HELPDIRLEN
+
+void showhelp(const char *filename)
+{
+   char nc,nr;
+   FILE *f;
+   char line[512]; // Max length of a line
+
+   nc = getnumcols();
+   nr = getnumrows();
+   cls();
+   drawbox(0,0,nr,nc-1,HELPPAGE,0x07,HELPBOX);
+
+   drawhorizline(2,0,nc-1,HELPPAGE,0x07,HELPBOX,0); // dumb==0
+   if (filename == NULL) { // print file contents
+     gotoxy(HELP_BODY_ROW,HELP_LEFT_MARGIN,HELPPAGE);
+     cswprint("Help system not initialized",0x07,HELP_LEFT_MARGIN);
+     return;
+   }
+   
+   f = fopen(filename,"r");
+   if (!f) { // No such file
+      sprintf(line, "File %s not found",filename);
+      gotoxy(HELP_BODY_ROW,HELP_LEFT_MARGIN,HELPPAGE);
+      cswprint(line,0x07,HELP_LEFT_MARGIN);
+      return;
+   }
+
+   // Now we have a file just print it.
+   fgets(line,sizeof line,f); // Get first line (TITLE)
+   gotoxy(1,(nc-strlen(line))/2,HELPPAGE);
+   csprint(line,0x07);
+
+   gotoxy(HELP_BODY_ROW,HELP_LEFT_MARGIN,HELPPAGE);
+   while ( fgets(line, sizeof line, f) ) cswprint(line,0x07,HELP_LEFT_MARGIN);
+   fclose(f);
+}
+
+void runhelpsystem(unsigned int helpid)
+{
+   char dp;
+   char scan;
+   char filename[HELPDIRLEN+16];
+
+   dp = getdisppage();
+   if (dp != HELPPAGE) setdisppage(HELPPAGE);
+   if (helpbasedir[0] != 0) {
+      sprintf(filename,"%s/hlp%05d.txt",helpbasedir,helpid);
+      showhelp(filename);
+   }
+   else showhelp (NULL);
+   while (1) {
+     inputc(&scan);
+     if (scan == ESCAPE) break;
+   }
+   if (dp != HELPPAGE) setdisppage(dp);
+}
+
+void init_help(const char *helpdir)
+{
+   if (helpdir != NULL)
+      strcpy(helpbasedir,helpdir);
+   else helpbasedir[0] = 0;
+}
+
+void close_help(void)
+{
+}