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

@import "/imports/ui/stylesheets/variables/_all";
@import "/imports/ui/stylesheets/mixins/_scrollable";
@import "/imports/ui/stylesheets/mixins/_indicators";

:root {
  --dropdown-bg: var(--color-white);
  --dropdown-color: var(--color-text);
  --caret-shadow-color: var(--color-gray);

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

  --rtl-caret-offset: -0.4375rem;
  --rtl-content-offset: 10.75rem;
}

.dropdown {
  position: relative;

  &:focus {
    outline: none;
  }
}

.content {
  @include highContrastOutline();
  outline-style: solid;
  z-index: 9999;
  position: absolute;
  background: var(--dropdown-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
  border: 0;
  padding: calc(var(--line-height-computed) / 2);

  [dir="rtl"] & {
    right: var(--rtl-content-offset);
  }

  &: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 calc(var(--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: 0.8rem;
  border-radius: 0;
  z-index: 1011;
  font-size: calc(var(--font-size-large) * 1.1);
  width: calc(100% - (var(--line-height-computed) * 2));
  left: var(--line-height-computed);
  box-shadow: 0 0 0 2rem var(--color-white) !important;
  border: var(--color-white) !important;

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

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

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

  &:before,
  &:after {
    border-left: var(--dropdown-caret-width) solid transparent;
    border-right: var(--dropdown-caret-width) solid transparent;
    border-top: var(--dropdown-caret-height) solid var(--dropdown-bg);
    bottom: 0;
    margin-bottom: calc(var(--dropdown-caret-height) * -1);
  }

  &:before {
    border-top: var(--dropdown-caret-height) solid var(--caret-shadow-color);
  }
}

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

  &:before,
  &:after {
    border-left: var(--dropdown-caret-width) solid transparent;
    border-right: var(--dropdown-caret-width) solid transparent;
    border-bottom: var(--dropdown-caret-height) solid var(--dropdown-bg);
    margin-top: calc(var(--dropdown-caret-height) * -1);
    top: 0;

    [dir="rtl"] & {
      right: 50%;
      transform: translateX(-150%);
    }
  }

  &:before {
    border-bottom: var(--dropdown-caret-height) solid var(--caret-shadow-color);
  }
}

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

  &:before,
  &:after {
    border-top: var(--dropdown-caret-width) solid transparent;
    border-bottom: var(--dropdown-caret-width) solid transparent;
    border-left: var(--dropdown-caret-height) solid var(--dropdown-bg);
    margin-right: calc(var(--dropdown-caret-height) * -1);
    top: 50%;
    right: 0;

    [dir="rtl"] & {
      left: 0;
      border-left: 0;
      border-right: var(--dropdown-caret-height) solid var(--dropdown-bg);
      margin-left: calc(var(--dropdown-caret-height) * -1);
    }
  }

  &:before {

    
    border-left: var(--dropdown-caret-height) solid var(--caret-shadow-color);
    border-right: 0;

    [dir="rtl"] & {
      transform: rotate(180deg);
      border-left: 0;
      border-right: var(--dropdown-caret-height) solid var(--caret-shadow-color);
    }
  }
}

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

  &:before,
  &:after {
    border-top: var(--dropdown-caret-width) solid transparent;
    border-bottom: var(--dropdown-caret-width) solid transparent;
    border-right: var(--dropdown-caret-height) solid var(--dropdown-bg);
    margin-left: calc(var(--dropdown-caret-height) * -1);
    top: 50%;
    left: 0;

    [dir="rtl"] & {
      transform: rotate(180deg);
      margin-right: calc(var(--dropdown-caret-height) * -1);
      right: 1px;
    }
  }

  &:before {
    border-right: var(--dropdown-caret-height) solid var(--caret-shadow-color);
    border-left: 0;

    [dir="rtl"] & {
      right: var(--rtl-caret-offset);
      border: none;
      margin: 0;
    }
  }
}

%horz-center-caret {
  &:after,
  &:before {
    left: 50%;
    margin-left: calc(var(--dropdown-caret-width) * -1);

    [dir="rtl"] & {
      margin-right: calc(var(--dropdown-caret-width) * -1);
    }
  }
}

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

  [dir="rtl"] & {
    right: 100%;
  }

  &:after,
  &:before {
    right: calc(var(--dropdown-caret-width) / 2);
  }
}

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

  &:after,
  &:before {
    left: var(--dropdown-caret-width);
  }
}

%vert-center-caret {
  &:after,
  &:before {
    margin-top: calc(var(--dropdown-caret-width) * -1);
  }
}

%vert-top-caret {
  top: 0;

  &:after,
  &:before {
    top: 0;
    margin-top: calc(var(--dropdown-caret-width) / 2);
  }
}

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

  &:after,
  &:before {
    top: auto;
    bottom: calc(var(--dropdown-caret-width) / 2);

    [dir="rtl"] & {
      top: calc(var(--dropdown-caret-width) / 2);
      bottom: auto;
    }
  }
}

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

.top-left, [dir="rtl"] .top-right {
  @extend %down-caret;
  @extend %horz-right-caret;
  min-width: 11.5rem;

  @include mq($small-only) {
    width: auto;
  }
}

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

[dir="rtl"] .top-left {
  @extend %down-caret;
  @extend %horz-left-caret;
  transform: translateX(25%);
}

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

.bottom-left, [dir="rtl"] .bottom-right {
  @extend %up-caret;
  @extend %horz-right-caret;
}

.bottom-right, [dir="rtl"] .bottom-left  {
  @extend %up-caret;
  @extend %horz-left-caret;
  min-width: 10rem;

  @include mq($small-only) {
    width: auto;
  }
}

.left, [dir="rtl"] .right {
  @extend %right-caret;
  @extend %vert-center-caret;
}

.left-top, [dir="rtl"] .right-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);
}

[dir="rtl"] .right-bottom  {
  @extend %right-caret;
  @extend %vert-bottom-caret;
  transform: translateX(-110%) translateY(0);
}

.right, [dir="rtl"] .left {
  @extend %left-caret;
  @extend %vert-center-caret;
}

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

[dir="rtl"] .right-top {
  transform: translateX(-25%) translateY(0%);
}

[dir="rtl"] .left-top {
  @extend %left-caret;
  @extend %vert-top-caret;
  transform: translateX(125%) translateY(-25%);
}

.right-bottom, [dir="rtl"] .left-bottom {
  @extend %left-caret;
  @extend %vert-bottom-caret;
  transform: translateX(100%) translateY(0);
}