tildes/tildes/scss/modules/_comment.scss

// Copyright (c) 2018 Tildes contributors <code@tildes.net>
// SPDX-License-Identifier: AGPL-3.0-or-later

.comment {
  border-left: 1px solid;
  margin-bottom: 0.4rem;

  &:target > .comment-itself {
    border-left: 3px solid;
  }
}

.comment[data-comment-depth="0"] {
  border-bottom: 1px solid;
}

.comment-header {
  display: flex;
  align-items: center;
  font-size: 0.7rem;
  line-height: 0.7rem;

  // no padding on mobile - the collapse button will do the job
  padding: 0 0.2rem 0 0;

  @media (min-width: $size-md) {
    padding: 0.2rem;
  }
}

.comment-user-info {
  margin-left: 0.2rem;
}

.comment-posted-time {
  margin-left: 0.4rem;
  font-size: 0.6rem;
}

.comment-edited-time {
  font-size: 0.6rem;
  font-style: italic;
  margin-left: 0.4rem;
}

.comment-excerpt {
  display: none;

  margin-left: 0.4rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.comment-branch-counter {
  display: none;

  margin-right: 0.4rem;
}

.comment-exemplary-reasons {
  display: inline-block;
  margin: 0.2rem 0.4rem;
  font-size: 0.6rem;

  &[open] {
    border-bottom: 1px dashed;
  }

  ul {
    list-style-type: circle;
    margin-top: 0;
    margin-left: 2rem;
  }
}

.comment-nav-link {
  @include min-touch-size;

  display: flex;
  align-items: center;

  font-size: 0.6rem;

  margin-left: 0.4rem;

  @media (min-width: $size-md) {
    margin-left: 1rem;
  }
}

.comment-tree {
  margin: 0;
  padding-top: 0.4rem;
  list-style-type: none;
}

.comment-tree-replies {
  margin-left: 0.4rem;

  @media (min-width: $size-xl) {
    margin-left: 1rem;
  }
}

.comment-tree-item {
  margin: 0;
  padding: 0;
  max-width: none;
}

.comment-labels {
  margin: 0 0 0 0.4rem;
  list-style-type: none;

  li {
    margin-top: 0;
    max-width: none;
  }
}

.comment-label-buttons {
  display: flex;
  flex-wrap: wrap;

  margin: 0;
  padding: 0 1rem;
  justify-content: space-between;

  @media (min-width: $size-md) {
    justify-content: left;
  }
}

.comment-label-count {
  font-size: 0.6rem;
}

.comment-text {
  @extend %text-container;

  padding: 0.2rem;
  padding-left: 0.4rem;
  overflow: auto;
}

.comment-removed-warning {
  font-weight: bold;
  font-size: 0.6rem;
}

.comment-votes {
  font-size: 0.6rem;
  font-weight: bold;
  margin: 0 0.4rem;
}

.is-comment-by-op {
  > .comment-itself {
    margin-left: -2px;
    border-left: 3px solid;

    .comment-user-info {
      font-weight: bold;
    }
  }
}

%collapsed {
  .comment-edited-time,
  .comment-exemplary-reasons,
  .comment-label-buttons,
  .comment-labels,
  .comment-nav-link,
  .comment-posted-time,
  .comment-tree-replies,
  .comment-text,
  .comment-votes,
  .btn-post {
    display: none;
  }

  .comment-excerpt {
    display: inline-block;
  }

  &.is-comment-by-op .comment-user-info {
    font-weight: normal;
  }

  header {
    font-size: 0.6rem;
    line-height: 0.8rem;
  }

  .btn-comment-collapse-label::after {
    content: "+";
  }
}

.is-comment-collapsed:not(:target) {
  @extend %collapsed;

  &[data-comment-depth="0"] {
    border-bottom: 0;
  }

  .comment-branch-counter {
    display: inline-block;
    font-size: 0.7rem;
  }
}

// uses @extend to only collapse everything inside the collapsed comment itself and
// not its replies
.is-comment-collapsed-individual:not(:target) {
  > .comment-itself {
    @extend %collapsed;
  }
}

.is-comment-deleted,
.is-comment-removed {
  font-size: 0.7rem;
  font-style: italic;
}

.is-comment-mine {
  > .comment-itself {
    margin-left: -2px;
    border-left: 3px solid;
  }
}

.is-comment-new {
  > .comment-itself {
    margin-left: -2px;
    border-left: 3px solid;
  }
}

.is-comment-exemplary {
  > .comment-itself {
    margin-left: -2px;
    border-left: 3px solid;
  }
}

@mixin flatten-single-replies-above-depth($depth) {
  // Makes it so that comments of the specified depth or greater will not indent
  // their replies when they only have one reply *and* they're also the only reply to
  // their parent (this avoids confusion between subtrees and siblings).
  // When indenting is avoided, it adds text at the top of the next comment (the single
  // reply) indicating that it's a direct reply to the above comment.

  // We actually need the selector to check 2 levels up from the specified starting
  // depth because of how we're utilizing nesting.
  @if ($depth < 2) {
    @error "Starting depth must be at least 2";
  }

  $depth: $depth - 2;

  .comment[data-comment-depth="#{$depth}"] {
    .comment[data-comment-replies="1"] > .comment-tree-replies > .comment-tree-item {
      > .comment[data-comment-replies="1"] {
        > .comment-tree-replies {
          margin-left: -1px;  // compensate for border

          > .comment-tree-item > .comment > .comment-itself {
            > .comment-text::before,
            > header > .is-comment-deleted::before,
            > header > .is-comment-removed::before {
              content: "(Reply to above comment)";
              font-size: 0.6rem;
              font-style: italic;
              margin-right: 0.2rem;
            }
          }
        }
      }
    }
  }
}

@media (max-width: $size-xs) {
  @include flatten-single-replies-above-depth(4);
}

@media (min-width: $size-xs) and (max-width: $size-sm) {
  @include flatten-single-replies-above-depth(7);
}

@media (min-width: $size-sm) and (max-width: $size-md) {
  @include flatten-single-replies-above-depth(10);
}

@media (min-width: $size-md) and (max-width: $size-lg) {
  // drop back down because sidebar shows up, which actually gives less space
  @include flatten-single-replies-above-depth(7);
}

@media (min-width: $size-lg) and (max-width: $size-xl) {
  @include flatten-single-replies-above-depth(9);
}

@media (min-width: $size-xl) and (max-width: $size-2x) {
  // don't increase much yet since left indent increases, so space is reduced again
  @include flatten-single-replies-above-depth(12);
}

@media (min-width: $size-2x) and (max-width: $size-max) {
  @include flatten-single-replies-above-depth(20);
}

@media (min-width: $size-max) {
  @include flatten-single-replies-above-depth(30);
}