1 files changed, 74 insertions, 0 deletions
diff --git a/vim/boxdraw/outline.pl b/vim/boxdraw/outline.pl
new file mode 100644
index 0000000..f095e7f
--- /dev/null
+++ b/vim/boxdraw/outline.pl
@@ -0,0 +1,74 @@
+# outlines groups of similar characters
+# 2003-11-24 15:07:28 Created by nsg
+# 2004-06-18 14:29:45 changed hex boxset to x; added double, horz, vert boxsets
+use strict;
+use utf8;
+use Getopt::Std;
+
+our (
+  $opt_s, # boxset (x=hex)
+  $opt_d, # double each input character
+  $opt_e, # output encoding
+);
+getopts("s:de:");
+$opt_s='s' if '' eq $opt_s;
+$opt_e='utf8' if '' eq $opt_e;
+
+binmode (STDIN, ":encoding($opt_e)");
+binmode (STDOUT, ":encoding($opt_e)");
+#binmode (STDOUT, ":encoding(utf8)");
+my $p='';
+
+my %boxset=(
+# 1|.,'}\u{25',"1 (_2 ]\ o_utf8) {~ 4#.2*#:i.16
+ 's'=>" \x{2502}\x{2500}\x{2514}\x{2502}\x{2502}\x{250c}\x{251c}\x{2500}\x{2518}\x{2500}\x{2534}\x{2510}\x{2524}\x{252c}\x{253c}\n",
+ 'd'=>" \x{2551}\x{2550}\x{255a}\x{2551}\x{2551}\x{2554}\x{2560}\x{2550}\x{255d}\x{2550}\x{2569}\x{2557}\x{2563}\x{2566}\x{256c}\n",
+ 'h'=>" \x{2502}\x{2550}\x{2558}\x{2502}\x{2502}\x{2552}\x{255e}\x{2550}\x{255b}\x{2550}\x{2567}\x{2555}\x{2561}\x{2564}\x{256a}\n",
+ 'v'=>" \x{2551}\x{2500}\x{2559}\x{2551}\x{2551}\x{2553}\x{255f}\x{2500}\x{255c}\x{2500}\x{2568}\x{2556}\x{2562}\x{2565}\x{256b}\n",
+);
+
+my $BOX=$boxset{$opt_s} || $boxset{'s'};
+
+# corners/splits:
+#  ┌┬┐╓╥╖╒╤╕╔╦╗ 6ec
+#  ├┼┤╟╫╢╞╪╡╠╬╣ 7fd
+#  └┴┘╙╨╜╘╧╛╚╩╝ 3b9
+# round corners:
+# 256d  256e
+# 2570  256f
+# horizontal
+#  ═ ─
+# vertical
+#  │ ║
+
+while(<STDIN>){
+  chomp;
+  s/./$&$&/g if $opt_d;
+  process_line();
+  $p=$_;
+}
+$_='';
+process_line();
+
+sub process_line
+{
+  my $out;
+  my $l=length;
+  $l=length($p) if length($p)>$l;
+  for my$i(0..$l) {
+    my $c=0;
+    $c|=1 if sc($p,$i-1) ne sc($p,$i);
+    $c|=2 if sc($p,$i) ne sc($_,$i);
+    $c|=4 if sc($_,$i) ne sc($_,$i-1);
+    $c|=8 if sc($_,$i-1) ne sc($p,$i-1);
+    $out.=substr($BOX,$c,1) if 'x' ne $opt_s;
+    $out.=sprintf"%1x",$c if 'x' eq $opt_s;
+  }
+  print "$out\n";
+}
+
+sub sc # (str, index)
+{
+  return ' ' if 0>$_[1] || $_[1]>=length($_[0]);
+  return substr($_[0],$_[1],1);
+}