Making padding an optional parameter.

Author: doctyper

README.md

@@ -27,7 +27,7 @@ And then import the mixins to your base SASS/SCSS file:
 Mixin
 ============
 
-#### borderbox($width [$height], $padding, [$border]);
+#### borderbox($width [$height], [$padding], [$border]);
 
 Sets box-sizing-compliant values, as well as legacy values for < IE 8
 

compass-borderbox.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   # Release Specific Information
-  s.version = "0.1.1.0"
+  s.version = "0.1.2.0"
   s.date = "2011-04-11"
 
   # Gem Details

stylesheets/box-sizing/_border-box.scss

@@ -12,7 +12,7 @@
 // }
 $global-border-box: false !default;
 
-@mixin borderbox($dimensions, $padding, $border: false) {
+@mixin borderbox($dimensions, $padding: false, $border: false) {
 	@if not $global-border-box {
 		@include box-sizing(border-box);
 	}
@@ -25,6 +25,29 @@ $global-border-box: false !default;
 		$height: nth($dimensions, 2);
 	}
 
+	// Extract padding values
+	$padding-length: length($padding);
+	$padding-y: 0;
+	$padding-x: 0;
+
+	@if $padding {
+		padding: $padding;
+
+		@if $padding-length == 4 {
+			$padding-y: nth($padding, 1) + nth($padding, 3);
+			$padding-x: nth($padding, 2) + nth($padding, 4);
+		} @else if $padding-length == 3 {
+			$padding-y: nth($padding, 1) + nth($padding, 3);
+			$padding-x: nth($padding, 2) * 2;
+		} @else if $padding-length == 2 {
+			$padding-y: nth($padding, 1) * 2;
+			$padding-x: nth($padding, 2) * 2;
+		} @else if $padding-length == 1 {
+			$padding-y: $padding * 2;
+			$padding-x: $padding * 2;
+		}
+	}
+
 	// Extract border values
 	$use-border-shorthand: false;
 	$border-width: false;
@@ -40,32 +63,11 @@ $global-border-box: false !default;
 			$use-border-shorthand: true;
 		}
 	}
-
-	// Extract padding values
-	padding: $padding;
-
-	$padding-length: length($padding);
-	$padding-y: 0;
-	$padding-x: 0;
-
+	
 	$border-length: length($border-width);
 	$border-y: 0;
 	$border-x: 0;
 
-	@if $padding-length == 4 {
-		$padding-y: nth($padding, 1) + nth($padding, 3);
-		$padding-x: nth($padding, 2) + nth($padding, 4);
-	} @else if $padding-length == 3 {
-		$padding-y: nth($padding, 1) + nth($padding, 3);
-		$padding-x: nth($padding, 2) * 2;
-	} @else if $padding-length == 2 {
-		$padding-y: nth($padding, 1) * 2;
-		$padding-x: nth($padding, 2) * 2;
-	} @else if $padding-length == 1 {
-		$padding-y: $padding * 2;
-		$padding-x: $padding * 2;
-	}
-
 	@if $border {
 		@if $use-border-shorthand {
 			border: $border;