bigbluebutton-Github/bigbluebutton-html5/imports/ui/components/dropdown/styles.scss

@import "../../stylesheets/variables/_all";
@import "../../stylesheets/mixins/_scrollable";

$dropdown-bg: $color-white;
$dropdown-color: $color-text;
$caret-shadow-color: $color-gray;

$dropdown-caret-width: 12px;
$dropdown-caret-height: 8px;

.dropdown {
  position: relative;
}

.content {
  position: absolute;
  background: $dropdown-bg;
  border-radius: $border-radius;
  box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
  border: 1px solid rgba(0, 0, 0, .15);
  padding: $line-height-computed / 2;
  z-index: 1000;

  &:after, &:before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
  }

  &[aria-expanded="false"] {
    display: none;
  }

  &[aria-expanded="true"] {
    display: block;
  }

  @include mq($small-only) {
    z-index: 1015;
    border-radius: 0;
    background-color: #fff;
    box-shadow: none;
    position: fixed;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    border: 0 !important;
    padding: 0 !important;
    margin: 0 0 $line-height-computed * 5.25 0 !important;
    transform: translateX(0) translateY(0) !important;

    &:after, &:before {
      display: none !important;
    }
  }
}

.scrollable {
  @include mq($small-only) {
    @include scrollbox-vertical();
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }
}

.trigger {}

.close {
  display: none;
  position: fixed;
  bottom: 1rem;
  z-index: 1011;
  font-size: $font-size-large * 1.1;
  width: calc(100% - #{($line-height-computed * 2)});
  left: $line-height-computed;
  box-shadow: 0 0 0 2rem #fff;

  @include mq($small-only) {
    display: block;
  }
}

/* Placements
 * ==========
 */

%down-caret {
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: $dropdown-caret-height * 1.25;

  &:before, &:after {
    border-left: $dropdown-caret-width solid transparent;
    border-right: $dropdown-caret-width solid transparent;
    border-top: $dropdown-caret-height solid $dropdown-bg;
    bottom: 0;
    margin-bottom: -($dropdown-caret-height);
  }

  &:before {
    border-top: $dropdown-caret-height solid $caret-shadow-color;
  }
}

%up-caret {
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: $dropdown-caret-height * 1.25;

  &:before, &:after {
    border-left: $dropdown-caret-width solid transparent;
    border-right: $dropdown-caret-width solid transparent;
    border-bottom: $dropdown-caret-height solid $dropdown-bg;
    margin-top: -($dropdown-caret-height);
    top: 0;
  }

  &:before {
    border-bottom: $dropdown-caret-height solid $caret-shadow-color;
  }
}

%right-caret {
  top: 50%;
  transform: translateX(-100%) translateY(-50%);
  left: -($dropdown-caret-height * 1.25);

  &:before, &:after{
    border-top: $dropdown-caret-width solid transparent;
    border-bottom: $dropdown-caret-width solid transparent;
    border-left: $dropdown-caret-height solid $dropdown-bg;
    margin-right: -($dropdown-caret-height);
    top: 50%;
    right: 0;
  }

  &:before {
    border-left: $dropdown-caret-height solid $caret-shadow-color;
  }
}

%left-caret {
  top: 50%;
  transform: translateX(100%) translateY(-50%);
  right: -($dropdown-caret-height * 1.25);

  &:before, &:after {
    border-top: $dropdown-caret-width solid transparent;
    border-bottom: $dropdown-caret-width solid transparent;
    border-right: $dropdown-caret-height solid $dropdown-bg;
    margin-left: -($dropdown-caret-height);
    top: 50%;
    left: 0;
  }

  &:before {
    border-right: $dropdown-caret-height solid $caret-shadow-color;
  }
}

%horz-center-caret {
  &:after, &:before {
    margin-left: -($dropdown-caret-width);
  }
}

%horz-left-caret {
  transform: translateX(-100%);
  left: 100%;

  &:after, &:before {
    right: $dropdown-caret-width / 2;
  }
}

%horz-right-caret {
  transform: translateX(100%);
  right: 100%;
  left: auto;

  &:after, &:before {
    left: $dropdown-caret-width / 2;
  }
}

%vert-center-caret {
  &:after, &:before {
    margin-top: -($dropdown-caret-width);
  }
}

%vert-top-caret {
  top: 0;

  &:after, &:before {
    top: 0;
    margin-top: $dropdown-caret-width / 2;
  }
}

%vert-bottom-caret {
  top: auto;
  bottom: 0;

  &:after, &:before {
    top: auto;
    bottom: $dropdown-caret-width / 2;
  }
}

.top {
  @extend %down-caret;
  @extend %horz-center-caret;
}

.top-left {
  @extend %down-caret;
  @extend %horz-right-caret;
}

.top-right {
  @extend %down-caret;
  @extend %horz-left-caret;
}

.bottom {
  @extend %up-caret;
  @extend %horz-center-caret;
}

.bottom-left {
  @extend %up-caret;
  @extend %horz-right-caret;
}

.bottom-right {
  @extend %up-caret;
  @extend %horz-left-caret;
}

.left {
  @extend %right-caret;
  @extend %vert-center-caret;
}

.left-top {
  @extend %right-caret;
  @extend %vert-top-caret;
  transform: translateX(-100%) translateY(0);
}

.left-bottom {
  @extend %right-caret;
  @extend %vert-bottom-caret;
  transform: translateX(-100%) translateY(0);
}

.right {
  @extend %left-caret;
  @extend %vert-center-caret;
}

.right-top {
  @extend %left-caret;
  @extend %vert-top-caret;
  transform: translateX(100%) translateY(0);
}

.right-bottom {
  @extend %left-caret;
  @extend %vert-bottom-caret;
  transform: translateX(100%) translateY(0);
}