1 files changed, 49 insertions, 37 deletions
diff --git a/library/font_awesome/scss/_mixins.scss b/library/font_awesome/scss/_mixins.scss
index ca9c5931b..c3bbd5745 100644
--- a/library/font_awesome/scss/_mixins.scss
+++ b/library/font_awesome/scss/_mixins.scss
@@ -1,48 +1,60 @@
 // Mixins
 // --------------------------
 
-@mixin icon($icon) {
-  @include icon-FontAwesome();
-  content: $icon;
+@mixin fa-icon() {
+  display: inline-block;
+  font: normal normal normal #{$fa-font-size-base}/#{$fa-line-height-base} FontAwesome; // shortening font declaration
+  font-size: inherit; // can't have font-size inherit on line above, so need to override
+  text-rendering: auto; // optimizelegibility throws things off #1094
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+
 }
 
-@mixin icon-FontAwesome() {
-  font-family: FontAwesome;
-  font-weight: normal;
-  font-style: normal;
-  text-decoration: inherit;
-  -webkit-font-smoothing: antialiased;
-  *margin-right: .3em; // fixes ie7 issues
+@mixin fa-icon-rotate($degrees, $rotation) {
+  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=#{$rotation})";
+  -webkit-transform: rotate($degrees);
+      -ms-transform: rotate($degrees);
+          transform: rotate($degrees);
+}
+
+@mixin fa-icon-flip($horiz, $vert, $rotation) {
+  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=#{$rotation}, mirror=1)";
+  -webkit-transform: scale($horiz, $vert);
+      -ms-transform: scale($horiz, $vert);
+          transform: scale($horiz, $vert);
 }
 
-@mixin border-radius($radius) {
-  -webkit-border-radius: $radius;
-  -moz-border-radius: $radius;
-  border-radius: $radius;
+
+// Only display content to screen readers. A la Bootstrap 4.
+//
+// See: http://a11yproject.com/posts/how-to-hide-content/
+
+@mixin sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0,0,0,0);
+  border: 0;
 }
 
-@mixin icon-stack($width: 2em, $height: 2em, $top-font-size: 1em, $base-font-size: 2em) {
-  .icon-stack {
-    position: relative;
-    display: inline-block;
-    width: $width;
-    height: $height;
-    line-height: $width;
-    vertical-align: -35%;
-    [class^="icon-"],
-    [class*=" icon-"] {
-      display: block;
-      text-align: center;
-      position: absolute;
-      width: 100%;
-      height: 100%;
-      font-size: $top-font-size;
-      line-height: inherit;
-      *line-height: $height;
-    }
-    .icon-stack-base {
-      font-size: $base-font-size;
-      *line-height: #{$height / $base-font-size}em;
-    }
+// Use in conjunction with .sr-only to only display content when it's focused.
+//
+// Useful for "Skip to main content" links; see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
+//
+// Credit: HTML5 Boilerplate
+
+@mixin sr-only-focusable {
+  &:active,
+  &:focus {
+    position: static;
+    width: auto;
+    height: auto;
+    margin: 0;
+    overflow: visible;
+    clip: auto;
   }
 }