[pull] master from persianphilosopher:master

scss/_functions.scss

@@ -1,70 +1,9 @@
-/**
- * Power of function.
- * @param  {number} $number   Base number.
- * @param  {number} $exponent Exponenet.
- * @return {number}           Result.
- */
-@function press_pow($number, $exponent) {
-	// https://css-tricks.com/snippets/sass/power-function/#article-header-id-2
-  $value: 1;
-  @if $exponent > 0 {
-    @for $i from 1 through round($exponent) {
-      $value: $value * $number;
-    }
-  } @else if $exponent < 0 {
-    @for $i from 1 through -$exponent {
-      $value: $value / $number;
-    }
+@function checkColor($color){
+  $test : round((red($color) * 0.299) + (green($color) * 0.587) + (blue($color) * 0.114));
+  @if($test  < 125){
+    @return $press-text-color;
   }
-  @return $value;
-}
-
-/**
- * Determin the luminance of a color.
- * @param  {color} $color A color.
- * @return {number}        Luminance.
- */
-@function press_color_luminance($color) {
-  // Adapted from: https://github.com/LeaVerou/contrast-ratio/blob/gh-pages/color.js
-  $rgba: red($color), green($color), blue($color);
-  $rgba2: ();
-  @for $i from 1 through 3 {
-    $rgb: nth($rgba, $i);
-    $rgb: $rgb / 255;
-    $rgb: if($rgb < .03928, $rgb / 12.92, press_pow(($rgb + .055) / 1.055, 2.4));
-    $rgba2: append($rgba2, $rgb);
-  }
-  @return ( .2126 * nth($rgba2, 1) + .7152 * nth($rgba2, 2) + 0.0722 * nth($rgba2, 3) );
-}
-
-/**
- * Generate a color ratio for two colors.
- * @param  {color} $color1 First color.
- * @param  {color} $color2 Second color.
- * @return {number}        Returns a rounded ratio number.
- */
-@function press_color_contrast_ratio($color1, $color2) {
-  // Adapted from: https://github.com/LeaVerou/contrast-ratio/blob/gh-pages/color.js
-  $luminance1: press_color_luminance($color1) + .05;
-  $luminance2: press_color_luminance($color2) + .05;
-  $ratio: $luminance1 / $luminance2;
-  @if $luminance2 > $luminance1 {
-    $ratio: 1 / $ratio;
-  }
-  $ratio: round($ratio * 10) / 10;
-  @return $ratio;
-}
-
-/**
- * Evaluable color contrast and return a contrasting color.
- * @param  {color} $background (Required) Color of text in background.
- * @param  {color} $textColor: $press-text-color (Optional) Color of text in foreground.
- * @return {color}             If enough contrast, it returns $textColor, else it returns $press-text-alt.
- */
-@function press_test_contrast($background, $textColor: $press-text-color) {
-  @if(press_color_contrast_ratio($textColor, $background) > 4.5) {
-    @return $textColor;
-  } @else {
+  @else {
     @return $press-text-alt;
   }
-}
+}

scss/press.scss

@@ -14,6 +14,15 @@ $press-text-alt: #000 !default;
  * @param  {color} $textColor: $press-text-color 	(Optional) Set a default text color.
  * @return {mixin}                					Returns the mixin and sub-classes.
  */
+
+@mixin setTextColor($condition, $color) {
+  @if($condition) {
+    --c: #{checkColor($color)};
+  }
+  @else {
+    --c: #{$press-text-color};
+  }
+}
 @mixin press( $testContrast: true, $textColor: $press-text-color ) {
 
 	// Base
@@ -34,7 +43,7 @@ $press-text-alt: #000 !default;
 	@each $color, $hex in $press-css-colors {
 		&-#{$color} {
 			--p: #{$hex};
-			--c: if( $testContrast, press_test_contrast($hex, $textColor), $textColor );
+			@include setTextColor($testContrast, $hex);
 			--h: #{lighten($hex, 5%)};
 			--a: #{darken($hex, 10%)};
 		}