From 205907a73eaf15c53de98f153e90890706e79cbe Mon Sep 17 00:00:00 2001
From: furun <furun@arcor.de>
Date: Tue, 15 Oct 2013 11:34:31 +0200
Subject: compact some CSS styles to their shorthand syntax FS#2509

---
 lib/exe/css.php | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'lib/exe')

diff --git a/lib/exe/css.php b/lib/exe/css.php
index afba5fc02..6dfdf06e8 100644
--- a/lib/exe/css.php
+++ b/lib/exe/css.php
@@ -473,8 +473,19 @@ function css_compress($css){
     $css = preg_replace('/ ?([;,{}\/]) ?/','\\1',$css);
     $css = preg_replace('/ ?: /',':',$css);
 
+    // number compression
+    $css = preg_replace('/([: ])0+(\.\d+?)0*((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2$3', $css); // "0.1em" to ".1em", "1.10em" to "1.1em"
+    $css = preg_replace('/([: ])\.(0)+((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2', $css); // ".0em" to "0"
+    $css = preg_replace('/([: ]0)0*(\.0*)?((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1', $css); // "0.0em" to "0"
+    $css = preg_replace('/([: ]\d+)(\.0*)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$3', $css); // "1.0em" to "1em"
+    $css = preg_replace('/([: ])0+(\d+|\d*\.\d+)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$2$3', $css); // "001em" to "1em"
+
+    // shorten attributes (1em 1em 1em 1em -> 1em)
+    $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width|radius)):)([\w\.]+)( \2)+(?=[;\}]| !)/', '$1$2', $css); // "1em 1em 1em 1em" to "1em"
+    $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width)):)([\w\.]+) ([\w\.]+) \2 \3(?=[;\}]| !)/', '$1$2 $3', $css); // "1em 2em 1em 2em" to "1em 2em"
+
     // shorten colors
-    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css);
+    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3(?=[^\{]*[;\}])/", "#\\1\\2\\3", $css);
 
     return $css;
 }
-- 
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