// Compatibility for browsers.

// rotate for ie8 and blow
.ie-rotate(@rotation) {
  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation);
}

// support rotate for all browsers
.cross-rotate(@degrees) {
  .rotate(@degrees);
  @cos: cos(@degrees);
  @sin: sin(@degrees);
  @nl: `"\n"`; // Newline
  /* IE8- */
  filter: ~"progid:DXImageTransform.Microsoft.Matrix(@{nl}    M11=@{cos},@{nl}    M12=-@{sin},@{nl}    M21=@{sin},@{nl}    M22=@{cos},@{nl}    sizingMethod='auto expand'@{nl}  )";
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(@{nl}    M11=@{cos},@{nl}    M12=-@{sin},@{nl}    M21=@{sin},@{nl}    M22=@{cos},@{nl}    sizingMethod='auto expand'@{nl}  )";
}

// for iconfont font size
// fix chrome 12px bug, support ie
.iconfont-size-under-12px(@iconfontSize) {
  display: inline-block;
  @font-scale: unit(@iconfontSize/@font-size-base);
  font-size: @font-scale;
  font-size: ~"@{iconfontSize} \9"; // ie8-9
  .scale(@font-scale);
  :root & {
    font-size: @font-size-base; // reset ie9 and above
  }
}