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To:	geda-user AT delorie DOT com
cc:	karl AT aspodata DOT se
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Subject:	Re: [geda-user] Symbol attributes
In-reply-to:	<20120725063536.GA24867@visitor2.iram.es>
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Comments:	In-reply-to Gabriel Paubert <paubert AT iram DOT es>
	message dated "Wed, 25 Jul 2012 08:35:36 +0200."
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Message-Id:	<20120725102654.55EAD8279F78@turkos.aspodata.se>
Date:	Wed, 25 Jul 2012 12:26:52 +0200 (CEST)
From:	karl AT aspodata DOT se (Karl Hammar)
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--------
Gabriel:
...
> The most annoying issue is that, being an attribute, it is displayed
> in a different color than the text associated with symbols which played
> a similar role in the standard library. I don't think it is right now
> possible to modify the colour depending on regexp matching on the attribute
> name; otherwise it would be nice if attribute name matching ".*label.*"
> would use text color (automatically atattribute promotion time).   
...

An attribute is simply a pair of lines:

T 100 1300 5 10 0 0 0 0 1
author=Karl Hammar

where the "5" above is the colour, see [1] for details.

If your program remembers the "previous" line, it can change the
colour.

Like in:

$ ./ch_colour.pl refdes 3 < ../share/gschem/ellyt.sym > a.sym
$ diff -u ../share/gschem/ellyt.sym a.sym
--- ../share/gschem/ellyt.sym   2011-07-26 15:06:05.000000000 +0200
+++ a.sym       2012-07-25 12:23:12.633211147 +0200
@@ -26,7 +26,7 @@
 author=Karl Hammar
 T 100 1100 5 10 0 0 0 0 1
 device=POLARIZED_CAPACITOR
-T 100 500 8 10 1 1 0 0 1
+T 100 500 3 10 1 1 0 0 1
 refdes=C?
 T 100 1300 5 10 0 0 0 0 1
 description=polarized capacitor
$ cat ./ch_colour.pl
#!/usr/bin/perl -w

use strict;

my $attr = shift;
my $colour = shift;

my $save = "";

while (<>) {
    if (m/^(T\s+\S+\s+\S+\s+)(\d+)(\s.*)$/) {
        $save = [ $_, $1, $2, $3 ];
    } elsif ($save) {
        if (m/^$attr=/) {
            print $$save[1], $colour, $$save[3], "\n";
            print;
            undef $save;
        } else {
            print $$save[0];
            print;
            undef $save;
        }
    } else {
        print;
    }
}
$

Regards,
/Karl Hammar

[1] http://wiki.geda-project.org/geda:file_format_spec#text_and_attributes

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