vditor/src/assets/less/_tooltipped.less

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/**
 * tool tip.
 *
 * @author <a href="http://vanessa.b3log.org">Liyuan Li</a>
 * @version 0.1.0.0, Jan 25, 2019
 */
@keyframes tooltip-appear {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.vditor-tooltipped {
  position: relative;
  cursor: pointer;

  &::after {
    position: absolute;
    z-index: 1000000;
    display: none;
    padding: 5px 8px;
    font-size: 11px;
    font-weight: normal;
    -webkit-font-smoothing: subpixel-antialiased;
    color: #fff;
    text-align: center;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    letter-spacing: normal;
    word-wrap: break-word;
    white-space: pre;
    pointer-events: none;
    content: attr(aria-label);
    background: #3b3e43;
    border-radius: 3px;
    line-height: 16px;
    opacity: 0;
  }

  &::before {
    position: absolute;
    z-index: 1000001;
    display: none;
    width: 0;
    height: 0;
    color: #3b3e43;
    pointer-events: none;
    content: "";
    border: 5px solid transparent;
    opacity: 0;
  }

  &--hover::before,
  &--hover::after,
  &:hover::before,
  &:hover::after,
  &:active::before,
  &:active::after,
  &:focus::before,
  &:focus::after {
    display: inline-block;
    text-decoration: none;
    animation-name: tooltip-appear;
    animation-duration: 0.15s;
    animation-fill-mode: forwards;
    animation-timing-function: ease-in;
  }

  &__s::after,
  &__se::after,
  &__sw::after {
    top: 100%;
    right: 50%;
    margin-top: 5px;
  }

  &__s::before,
  &__se::before,
  &__sw::before {
    top: auto;
    right: 50%;
    bottom: -5px;
    margin-right: -5px;
    border-bottom-color: #3b3e43;
  }

  &__se::after {
    right: auto;
    left: 50%;
    margin-left: -15px;
  }

  &__sw::after {
    margin-right: -15px;
  }

  &__n::after,
  &__ne::after,
  &__nw::after {
    right: 50%;
    bottom: 100%;
    margin-bottom: 5px;
  }

  &__n::before,
  &__ne::before,
  &__nw::before {
    top: -5px;
    right: 50%;
    bottom: auto;
    margin-right: -5px;
    border-top-color: #3b3e43;
  }

  &__ne::after {
    right: auto;
    left: 50%;
    margin-left: -15px;
  }

  &__nw::after {
    margin-right: -15px;
  }

  &__s::after,
  &__n::after {
    transform: translateX(50%);
  }

  &__w::after {
    right: 100%;
    bottom: 50%;
    margin-right: 5px;
    transform: translateY(50%);
  }

  &__w::before {
    top: 50%;
    bottom: 50%;
    left: -5px;
    margin-top: -5px;
    border-left-color: #3b3e43;
  }

  &__e::after {
    bottom: 50%;
    left: 100%;
    margin-left: 5px;
    transform: translateY(50%);
  }

  &__e::before {
    top: 50%;
    right: -5px;
    bottom: 50%;
    margin-top: -5px;
    border-right-color: #3b3e43;
  }
}

@media screen and (max-width: @max-width) {
  .vditor-tooltipped:before,
  .vditor-tooltipped:after {
    content: none;
  }
}