Merge pull request #24 from ianrose/adds-slient-option

Adds a slient option to rhythm functions

_typesettings.scss

@@ -105,17 +105,17 @@ $not-integer-txt: ' value breaks vertical rhythm. Use an interger (whole number)
 
 // Returns an EM value that is a multiple of our defined base vertical unit. For
 // example 3 becomes 1.125em
-@function emRhythm($lines: $base-vertical-unit, $font-size: $base-em-font-size) {
-  @if is-int($lines) == false {
+@function emRhythm($lines: $base-vertical-unit, $font-size: $base-em-font-size, $slient: false) {
+  @if is-int($lines) == false and $slient == false {
     @warn  #{$lines} + $not-integer-txt;
   }
   @return (stripUnits($lines) * stripUnits($base-vertical-unit)) / (stripUnits($font-size) * stripUnits($base-font-size)) + 0em;
 }
 
 // Returns a unitless number that is a multiple of our defined base vertical unit.
 // For example 3 becomes 1.125
-@function unitlessRhythm($lines: $base-line-multi, $font-size: $base-em-font-size) {
-  @if is-int($lines) == false {
+@function unitlessRhythm($lines: $base-line-multi, $font-size: $base-em-font-size, $slient: false) {
+  @if is-int($lines) == false and $slient == false {
     @warn #{$lines} + $not-integer-txt;
   }
   @return ($lines * stripUnits($base-vertical-unit)) / (stripUnits($font-size) * stripUnits($base-font-size));

test/test.css

@@ -160,4 +160,7 @@ hr {
   padding-top: 1.4375em; }
 
 .div {
-  margin-bottom: 0.45em; }
+  margin-bottom: 0.1125em; }
+
+.div {
+  margin-bottom: 0.215625em; }

test/test.scss

@@ -1,5 +1,9 @@
 @import "../typesettings";
 
 .div {
-  margin-bottom: emRhythm(1.2);
+  margin-bottom: emRhythm(1.2, 4, true);
+}
+
+.div {
+  margin-bottom: emRhythm(2.3, 4, false);
 }