1  // Mixins
 2  // --------------------------
 3  
 4  .fa-icon() {
 5    display: inline-block;
 6    font: normal normal normal @fa-font-size-base/@fa-line-height-base @fa-font-family; // shortening font declaration
 7    font-size: inherit; // can't have font-size inherit on line above, so need to override
 8    text-rendering: auto; // optimizelegibility throws things off #1094
 9    -webkit-font-smoothing: antialiased;
10    -moz-osx-font-smoothing: grayscale;
11  
12  }
13  
14  .fa-icon-rotate(@degrees, @rotation) {
15    -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=@{rotation})";
16    -webkit-transform: rotate(@degrees);
17        -ms-transform: rotate(@degrees);
18            transform: rotate(@degrees);
19  }
20  
21  .fa-icon-flip(@horiz, @vert, @rotation) {
22    -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=@{rotation}, mirror=1)";
23    -webkit-transform: scale(@horiz, @vert);
24        -ms-transform: scale(@horiz, @vert);
25            transform: scale(@horiz, @vert);
26  }
27  
28  
29  // Only display content to screen readers. A la Bootstrap 4.
30  //
31  // See: http://a11yproject.com/posts/how-to-hide-content/
32  
33  .sr-only() {
34    position: absolute;
35    width: 1px;
36    height: 1px;
37    padding: 0;
38    margin: -1px;
39    overflow: hidden;
40    clip: rect(0,0,0,0);
41    border: 0;
42  }
43  
44  // Use in conjunction with .sr-only to only display content when it's focused.
45  //
46  // Useful for "Skip to main content" links; see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
47  //
48  // Credit: HTML5 Boilerplate
49  
50  .sr-only-focusable() {
51    &:active,
52    &:focus {
53      position: static;
54      width: auto;
55      height: auto;
56      margin: 0;
57      overflow: visible;
58      clip: auto;
59    }
60  }