From: Ian Jackson <ian@davenant.relativity.greenend.org.uk>
Date: Sun, 19 Oct 2008 18:25:34 +0000 (+0100)
Subject: show title
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=moebius2.git;a=commitdiff_plain;h=32c7d2a5c5cb58ed3a8fb9fc383a31a80b01c052

show title
---

diff --git a/view.c b/view.c
index a395c8c..36b85b5 100644
--- a/view.c
+++ b/view.c
@@ -25,11 +25,44 @@ static struct stat input_stab;
 static const char *input_filename;
 static int pause_updates;
 
+#define TITLE_MAX 100
+static char title[TITLE_MAX+1];
+
 static void read_input(void) {
-  int r;
+  int r, last_readlink_r, last_readlink_errno=0;
+  char symlink_check[sizeof(title)];
+
+  last_readlink_r= -2;
   
-  if (input_f) fclose(input_f);
-  input_f= fopen(input_filename, "rb");  if (!input_f) diee("input file");
+  for (;;) {
+    r= readlink(input_filename, symlink_check, TITLE_MAX);
+    assert(r<=TITLE_MAX);
+    assert(r!=-2);
+
+    if (r>=0) symlink_check[r]= 0;
+    else symlink_check[0]= 0;
+
+    if (r == last_readlink_r &&
+	(r<0
+	 ? (errno==last_readlink_errno)
+	 : !strcmp(symlink_check, title))) {
+      assert(input_f);
+      if (r<0) {
+	if (last_readlink_errno==EINVAL)
+	  snprintf(title,sizeof(title),"%s",input_filename);
+	else
+	  snprintf(title,sizeof(title),"? %s",strerror(last_readlink_errno));
+      }
+      break;
+    }
+    
+    strcpy(title, symlink_check);
+    last_readlink_r= r;
+    last_readlink_errno= errno;
+
+    if (input_f) fclose(input_f);
+    input_f= fopen(input_filename, "rb");  if (!input_f) diee("input file");
+  }
 
   if (fstat(fileno(input_f), &input_stab)) diee("fstat input file");
 
@@ -255,7 +288,8 @@ static void display_conformation(void) {
     drawtriangles(&dmwhite);
     printf("shown, %d/%d triangles cut\n", ncut, ntris);
   }
-  
+
+  XA( XStoreName(display,window,title) );
   XA( XSetWindowBackgroundPixmap(display,window,pixmap) );
   XA( XClearWindow(display,window) );
   currentbuffer= !currentbuffer;