discourse/app/assets/stylesheets/common/base/rtl.scss

// Right to left styles.
// *** These styles are all going to be flipped by the r2 gem ***
// Adding the !important declaration to a rule prevents it from being flipped.

// This is used to flip the .d-icon-caret-right
@mixin rotate($degrees) {
  -webkit-transform: rotate(#{$degrees}deg);
  -moz-transform: rotate(#{$degrees}deg);
  -ms-transform: rotate(#{$degrees}deg);
  -o-transform: rotate(#{$degrees}deg);
  transform: rotate(#{$degrees}deg);

  filter: "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=#{cos($degrees)}, M12=-#{sin($degrees)}, M21=#{sin($degrees)}, M22=#{cos($degrees)})";
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=#{cos($degrees)}, M12=-#{sin($degrees)}, M21=#{sin($degrees)}, M22=#{cos($degrees)})";
  zoom: 1;
}

// Get the right caret to point left
.rtl .d-icon-caret-right {
  @include rotate(180);
}

// Changes the triangle arrow direction in .nav-stacked .active
// The 'left' and 'right' in these selectors is not being flipped by r2.
.rtl .nav-stacked a.active::after {
  border-left-color: transparent !important;
  border-right-color: $secondary !important;
}
.rtl code {
  direction: ltr !important;
  text-align: left !important;
}
.rtl .pull-left {
  float: right !important;
}
.rtl .autocomplete {
  left: 27px;
}

.rtl .admin-customize .current-style .toggle-mobile {
  position: static !important;
  float: left !important;
}
.rtl .admin-customize .current-style .toggle-maximize {
  position: static !important;
  float: left !important;
}
.rtl .dashboard-left {
  float: right !important;
}
.rtl .dashboard-right {
  float: left !important;
}

// This is for the support_mixed_text_direction setting
.cooked ul[dir="ltr"],
.d-editor-preview ul[dir="ltr"],
.cooked ul[dir="rtl"],
.d-editor-preview ul[dir="rtl"] {
  padding-right: 40px;
  padding-left: 40px;
}

// Fixes github oneboxes for RTL sites
.rtl aside.onebox.githubblob {
  padding: 12px 25px 12px 12px !important;
  direction: ltr !important;
}

.rtl aside.onebox.githubblob .source {
  background-position: 0 50% !important;
  padding-right: 20px;
}

.rtl pre.onebox code ol.lines {
  margin: 0 0 0 40px !important;
}

.rtl pre.onebox code ol.lines li:before {
  right: -40px;
  padding-left: 5px;
  padding-right: 0;
  text-align: right !important;
}

.rtl pre.onebox code ol.lines li {
  padding-right: 5px;
  padding-left: 0;
  margin-right: 0;
  border-right: 1px solid #cfcfcf;
  border-left: none !important;
}