From f0f1f9c2f04fb0e331a32343ab6ef6be39552cf6 Mon Sep 17 00:00:00 2001
From: Stefan Schippers <stefan.schippers@gmail.com>
Date: Fri, 16 Oct 2020 18:24:06 +0200
Subject: [PATCH] optimization in preview function: no un-needed redraw of
 current schematic; no window title change when previewing xschem files

---
 src/save.c  | 2 +-
 src/token.c | 4 ++--
 src/xinit.c | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/save.c b/src/save.c
index 8da44eef..c0a914ba 100644
--- a/src/save.c
+++ b/src/save.c
@@ -1037,7 +1037,7 @@ void load_schematic(int load_symbols, const char *filename, int reset_undo) /* 2
     my_strncpy(xctx->current_name, name, S(xctx->current_name));
   }
   if(has_x) { /* 20161207 moved after if( (fd=..))  */
-    if(strcmp(get_cell(xctx->sch[xctx->currsch],1), "systemlib/font")) {
+    if(reset_undo) {
       tcleval( "wm title . \"xschem - [file tail [xschem get schname]]\""); /* 20150417 set window and icon title */
       tcleval( "wm iconname . \"xschem - [file tail [xschem get schname]]\"");
     }
diff --git a/src/token.c b/src/token.c
index 7274ab7f..e25372e1 100644
--- a/src/token.c
+++ b/src/token.c
@@ -465,9 +465,9 @@ const char *get_tok_value(const char *s,const char *tok, int with_quotes)
   static char *token=NULL;
   int size=0;
   int  sizetok=0;
-  register int c, state=XBEGIN, space;
+  register int c, space;
   register int token_pos=0, value_pos=0;
-  int quote=0;
+  int quote=0, state=XBEGIN;
   int escape=0;
   int cmp = 1;
 
diff --git a/src/xinit.c b/src/xinit.c
index 139e179d..b9174dee 100644
--- a/src/xinit.c
+++ b/src/xinit.c
@@ -840,7 +840,7 @@ void preview_window(const char *what, const char *tk_win_path, const char *filen
     window = save_window;
     resetwin();
     change_linewidth(-1.);
-    draw();
+    /* draw(); */ /* not needed: event loop takes care of this. */
     event_reporting = save_ev;
   }
   else if(!strcmp(what, "destroy")) {