From 5eae1f77a18ef8273f3a0cd6d4af8c19a4986880 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Sun, 19 Apr 2015 21:24:51 +0300
Subject: [PATCH] Put common css in a separate stylesheet

---
 js/90-themes.js |  2 +-
 make_static.PL  | 44 +++++++++++++++++++++++++++++++++++---------
 tmpl/skel.en    |  1 +
 3 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/js/90-themes.js b/js/90-themes.js
index 0e48176..1ff13ae 100644
--- a/js/90-themes.js
+++ b/js/90-themes.js
@@ -1,5 +1,5 @@
 function set_style(name){
-	$('link[rel~="stylesheet"]').each(e => e.disabled = true);
+	$('link[title]').each(e => e.disabled = true);
 	$('link[title="' + name + '"]')[0].disabled = false;
 	localStorage.setItem("theme", name);
 }
diff --git a/make_static.PL b/make_static.PL
index 0d8d10b..0c43960 100644
--- a/make_static.PL
+++ b/make_static.PL
@@ -2,11 +2,11 @@
 use v5.14;
 use warnings;
 
-use CSS::Minifier::XS qw//;
-
+use CSS::Minifier::XS qw/minify/;
 use Digest::SHA qw/sha256_base64/;
 use IO::Compress::Gzip qw/gzip/;
 use File::Slurp qw/read_file write_file edit_file_lines/;
+use List::Util qw/first/;
 
 mkdir 'static';
 mkdir 'static/css';
@@ -17,15 +17,41 @@ sub gzip_file {
 	gzip $file => "$file.gz", -Level => 9, Minimal => 1;
 }
 
+sub read_css_into_blocks {
+	my ($file) = @_;
+	my (@blocks, $block);
+	for (read_file $file) {
+		$block .= $_;
+		if (/^}/) {
+			push @blocks, $block;
+			$block = '';
+		}
+	}
+	\@blocks
+}
+
 sub make_css {
-	my $common_css;
-	$common_css .= read_file $_ for <css/*.css>;
+	my %css;
+	$css{common} .= read_file $_ for <css/*.css>;
+
+	my (%themes, $rndtheme);
 	for (<css/themes/*>) {
-		my ($theme) = m,themes/(.*)\.css,;
-		my $css = read_file $_;
-		$css .= $common_css;
-		write_file "static/css/$theme.css", CSS::Minifier::XS::minify $css;
-		gzip_file "static/css/$theme.css";
+		($rndtheme) = m,themes/(.*)\.css,;
+		$themes{$rndtheme} = read_css_into_blocks $_;
+	}
+
+	while (grep { scalar @$_ } values %themes) {
+		my %blocks = map { $_ => (shift @{$themes{$_}}) // '' } keys %themes;
+		if (grep { $_ ne $blocks{$rndtheme} } values %blocks) {
+			$css{$_} .= $blocks{$_} for keys %themes;
+		} else {
+			$css{common} .= $blocks{$rndtheme};
+		}
+	}
+
+	for my $name (keys %css) {
+		write_file "static/css/$name.css", minify $css{$name};
+		gzip_file "static/css/$name.css"
 	}
 }
 
diff --git a/tmpl/skel.en b/tmpl/skel.en
index b28726c..57f4e91 100644
--- a/tmpl/skel.en
+++ b/tmpl/skel.en
@@ -3,6 +3,7 @@
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+<link href="/static/css/common.css" rel="stylesheet" integrity="x">
 <link href="/static/css/cyborg.css" title="cyborg" rel="stylesheet" integrity="x">
 <link href="/static/css/slate.css" title="slate" rel="alternate stylesheet" integrity="x">
 <link href="/static/css/readable.css" title="readable" rel="alternate stylesheet" integrity="x">
-- 
2.30.2