_inner-border.scss.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../resources/prettify/prettify.js"></script>
<style type="text/css">
.highlight { display: block; background-color: #ddd; }
</style>
<script type="text/javascript">
function highlight() {
document.getElementById(location.hash.replace(/#/, "")).className = "highlight";
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</head>
<body onload="prettyPrint(); highlight();">
<pre class="prettyprint lang-js">@function inner-border-spread($width) {
$top: top($width);
$right: right($width);
$bottom: bottom($width);
$left: left($width);
@return min(($top + $bottom) / 2, ($left + $right) / 2);
}
@function inner-border-hoff($width, $spread) {
$left: left($width);
$right: right($width);
@if $right <= 0 {
@return $left - $spread;
}
@else {
@return $spread - $right;
}
}
@function inner-border-voff($width, $spread) {
$top: top($width);
$bottom: bottom($width);
@if $bottom <= 0 {
@return $top - $spread;
}
@else {
@return $spread - $bottom;
}
}
@function even($number) {
@return ceil($number / 2) == ($number / 2);
}
@function odd($number) {
@return ceil($number / 2) != ($number / 2);
}
@function inner-border-usesingle-width($width) {
$top: top($width);
$right: right($width);
$bottom: bottom($width);
$left: left($width);
@if $top == 0 {
@if $left + $right == 0 {
@return true;
}
@if $bottom >= $left + $right {
@return true;
}
}
@if $bottom == 0 {
@if $left + $right == 0 {
@return true;
}
@if $top >= $left + $right {
@return true;
}
}
@if $left == 0 {
@if $top + $bottom == 0 {
@return true;
}
@if $right >= $top + $bottom {
@return true;
}
}
@if $right == 0 {
@if $top + $bottom == 0 {
@return true;
}
@if $left >= $top + $bottom {
@return true;
}
}
@if $top + $bottom == $left + $right and even($top) == even($bottom) and even($left) == even($right) {
@return true;
}
@return false;
}
@function inner-border-usesingle-color($color) {
$top: top($color);
$right: right($color);
$bottom: bottom($color);
$left: left($color);
@if $top == $right == $bottom == $left {
@return true;
}
@return false;
}
@function inner-border-usesingle($width, $color) {
@if inner-border-usesingle-color($color) and inner-border-usesingle-width($width) {
@return true;
}
@return false;
}
@mixin inner-border($width: 1px, $color: #fff, $blur: 0px) {
@if inner-border-usesingle($width, $color) {
$spread: inner-border-spread($width);
$hoff: inner-border-hoff($width, $spread);
$voff: inner-border-voff($width, $spread);
@include single-box-shadow($color-top, $hoff, $voff, $blur, $spread, true);
}
@else {
$width-top: top($width);
$width-right: right($width);
$width-bottom: bottom($width);
$width-left: left($width);
$color-top: top($color);
$color-right: right($color);
$color-bottom: bottom($color);
$color-left: left($color);
$shadow-top: false;
$shadow-right: false;
$shadow-bottom: false;
$shadow-left: false;
@if $width-top > 0 {
$shadow-top: $color-top 0 $width-top $blur 0 inset;
}
@if $width-right > 0 {
$shadow-right: $color-right (-1 * $width-right) 0 $blur 0 inset;
}
@if $width-bottom > 0 {
$shadow-bottom: $color-bottom 0 (-1 * $width-bottom) $blur 0 inset;
}
@if $width-left > 0 {
$shadow-left: $color-left $width-left 0 $blur 0 inset;
}
@include box-shadow($shadow-top, $shadow-bottom, $shadow-right, $shadow-left);
}
}</pre>
</body>
</html>