FixIt/assets/scss/content/_code.scss

@use "sass:color";
@use "sass:meta";
@use "sass:string";
@use "core/functions" as *;
@use "core/mixins" as *;
@use "variables" as *;
@use "code-syntax";
@use "copy-icon-btn";

.single {
  // inline code
  code {
    @include inline-code;
  }

  // color preview styles for inline code
  .color-code {
    position: relative;
    @include set-fi-var(color-code-size, 0.64em);

    .color-preview {
      display: inline-block;
      width: fi-var(color-code-size);
      height: fi-var(color-code-size);
      @include border-radius(full);
      margin-right: 0.25em;
      vertical-align: middle;
      border: 1px solid;
      pointer-events: none;
      translate: 0 -1px;
      border-color: light-dark(#d1d9e0b3, #3d444db3);
    }
  }

  // indented code
  pre {
    margin: 0;
    line-height: 1.45em;
    padding: 0.5rem 0.75rem;
    overflow: auto;
    font-size: fi-var(code-block-font-size);
    font-family: fi-var(code-font-family);
    background-color: fi-var(code-block-background-color);
    tab-size: 4;
    @include border-radius;

    + pre {
      margin-top: 0.5rem;
    }

    code {
      padding: 0;
      background-color: transparent;
      font-size: inherit;
      line-height: inherit;
      min-width: max-content;
      @include border-radius(0);
    }

    img {
      min-height: 1em;
      max-height: 1.2em;
      vertical-align: text-bottom;
    }
  }

  .highlight,
  .gist {
    font-size: fi-var(code-block-font-size);
    font-family: fi-var(code-font-family);
    @include set-fi-var(scrollbar-thumb-color, inherit);

    table {
      width: 100%;
      max-width: 100%;
      border-spacing: 0;
      border-collapse: collapse;
    }

    table,
    table thead,
    table tr,
    table td {
      margin: 0;
      padding: 0;
      border: none;
    }
  }

  // Code fences blocks or highlight shortcodes
  .highlight {
    margin: 0.5rem 0;
    position: relative;
    @include border-radius;

    // lineNumbersInTable=true
    > div.chroma {
      position: relative;
      background-color: fi-var(code-block-background-color);
      @include border-radius;

      &:is(pre):has(.ln) {
        padding: 0.5rem;
      }

      .lntable {
        overflow: auto;
        overscroll-behavior-x: none;
        display: block;
        background-color: fi-var(code-block-background-color);
        @include border-radius;

        td {
          vertical-align: top;
          padding: 0;
        }

        pre {
          outline-offset: -1px;
          @include border-radius(0);
        }

        // line numbers
        .lntd:first-child {
          position: sticky;
          left: 0;
        }
        // code content
        .lntd:last-child {
          width: 100%;
          code {
            width: 100%;
          }
        }
      }
    }

    // line numbers (lineNumbersInTable=true)
    .lnt {
      display: block;
      width: calc(#{fi-var(line-digit)} * 1ch);
      min-width: 0.75rem;
      text-align: right;
    }
    // line numbers (lineNumbersInTable=false)
    .ln {
      display: inline-block;
      width: calc(#{fi-var(line-digit)} * 1ch);
      min-width: 0.75rem;
      text-align: right;
      padding-right: 0.75rem;
      position: sticky;
      left: 0;
    }
    // Line numbers
    .lnt,
    .ln {
      color: fi-var(global-font-secondary-color);
      user-select: none;
    }

    &:not(.code-block) {
      .lntd:last-child pre.chroma {
        padding-left: 0;
      }
    }

    // code fences blocks wrapped
    &.code-block {
      &[data-shadow='always'] {
        @include box-shadow(always);
      }

      &[data-shadow='hover'] {
        @include box-shadow(hover);
      }

      .code-wrapper {
        overflow: hidden;
        height: auto;
        position: relative;
        counter-reset: codeNos calc(#{fi-var(line-start)} - 1);
        transition: height 0.5s ease-out;
        @include border-radius;
        @include border-radius;
        // attr() for arbitrary properties is currently only supported in Chromium-based browsers (see https://caniuse.com/css3-attr);
        // non-supporting browsers fall back to values set via Hugo templating in render-codeblock.html
        @include set-fi-vars((
          max-shown-lines: attr(data-max number, 10),
          line-start: attr(data-line-start number, 1),
          line-digit: attr(data-line-digit number, 1),
        ));

        @include media('reduce-motion') {
          transition: none;
        }
      }

      // code preview
      &:has(.code-expand-btn):not(.is-expanded, .is-collapsed) {
        .code-wrapper {
          height: calc(1.45em * #{fi-var(max-shown-lines)} + #{fi-var(code-expand-offset, 0.5rem)});
        }
        &[data-mode='mac'] .code-wrapper {
          @include set-fi-var(code-expand-offset, 1.875rem + 0.5rem);
        }
      }

      .code-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        box-sizing: border-box;
        width: 100%;
        font-family: fi-var(global-font-family);
        font-weight: bold;
        line-height: 1.4em;
        color: fi-var(code-header-color);
        background-color: fi-var(code-header-background-color);
        position: sticky;
        transition: border-radius 0s;
        cursor: pointer;
        @include z-index(base, 1);
        @include border-radius(top);
        @include sticky-top-offset;

        + .code-wrapper {
          @include border-radius(bottom);

          > pre.chroma {
            @include border-radius(bottom);
          }
        }

        .code-title {
          width: 100%;
          padding: 0.4rem;

          &::after {
            padding-left: 0.2rem;
            content: attr(data-name, fi-var(code-type, 'Code'));
          }

          // filename for code block
          &[data-name]::after {
            @include overflow-wrap(break-word);
          }

          .arrow {
            padding: 0 0.2rem;
            transition: rotate 0.2s ease;
          }

          .title-inner {
            position: absolute;
            left: 50%;
            translate: -50% 0;
            background-color: fi-var(code-header-background-color);
            padding-inline: 1em;
            max-width: calc(100% - 200px);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            @include z-index(base, 2);
          }
        }

        .ellipses-btn {
          display: none;
          padding: 0.4rem;
        }

        button {
          padding: 0.4rem;

          @include media('print') {
            display: none !important;
          }
        }

        .copy-btn[data-copied] .fa-clone {
          --fa: "\f00c";
          font-weight: 900;
          color: fi-var(global-link-hover-color);
        }

        .download-btn[data-downloaded] .fa-download {
          --fa: "\f1ce";
          font-weight: 900;
          color: fi-var(global-link-hover-color);
        }

        @each $type, $text in $chroma-lexers {
          &.language-#{string.to-lower-case($type)} {
            // e.g., --fi-code-type: "JavaScript";
            @include set-fi-var(code-type, $text);
          }
        }

        @include media('print') {
          top: initial !important;
        }
      }

      &.line-wrapping .line-wrap-btn,
      &:not(.line-nos-hidden) .line-nos-btn,
      .code-header button:hover,
      &:has([contenteditable='true']) .edit-btn {
        color: fi-var(global-link-hover-color);
      }

      &.is-fullscreen {
        position: fixed;
        inset: 0;
        margin: 0 !important;
        overflow: auto;
        @include z-index(fixed, 1);
        @include border-radius(0);

        .code-header {
          top: 0 !important;
          cursor: default;
          @include border-radius(0);

          .arrow {
            display: none;
          }
        }

        .code-wrapper {
          overflow: auto;
          // 1.4em for header height, 0.8rem for padding
          height: calc(100dvh - 1.4em - 0.8rem);
        }

        .code-expand-btn {
          display: none;
        }
      }

      .code-expand-btn {
        width: 100%;
        padding-block: 1rem;
        text-align: center;
        position: absolute;
        bottom: 0;
        background: linear-gradient(
          180deg,
          light-dark(rgba($code-background-color, 0), rgba($code-background-color-dark, 0)) 0%,
          light-dark(rgba($code-background-color, 0.9), rgba($code-background-color-dark, 0.9)) 60%,
          light-dark($code-background-color, $code-background-color-dark) 100%
        );
        @include z-index(base);
        @include border-radius(bottom);

        .fa-angles-down {
          opacity: 0;
          animation-name: fadeOutDown;
          animation-duration: 1.5s;
          animation-iteration-count: infinite;
          animation-delay: 0.3s;
          transition: transform 0.2s ease;
        }
      }

      .copy-icon-btn {
        position: absolute;
        top: 0.5rem;
        right: 0.5rem;
      }

      // classic mode code block collapsed
      &.is-collapsed {
        .code-header {
          transition: border-radius 0.2s ease 0.2s;
          @include border-radius;
          @include set-fi-var(
            code-header-background-color,
            light-dark(color.adjust($code-header-background-color, $lightness: -1%), color.adjust($code-header-background-color-dark, $lightness: -1%))
          );

          + .code-wrapper {
            height: 0;
          }
        }

        .arrow {
          rotate: -90deg;
        }

        .ellipses-btn {
          display: inline;
        }

        .code-header .action-btn,
        .code-expand-btn {
          display: none;
        }
      }

      // code preview expanded
      &.is-expanded {
        margin-bottom: 1rem;
        &:has([contenteditable='true']) .code-expand-btn {
          display: none;
        }
        .code-expand-btn {
          background: transparent;
          padding-block: 0;
          translate: 0 1rem;

          .fa-angles-down {
            animation-name: fadeOutRotate;

            @keyframes fadeOutRotate {
              0% {
                opacity: 1;
                rotate: 180deg;
              }
              100% {
                opacity: 0;
                rotate: 180deg;
                translate: 0 -100%;
              }
            }
          }
        }
      }

      // hide original line numbers
      &.line-nos-hidden {
        > .chroma .lntable {
          width: 100%;
          overscroll-behavior-x: contain;

          > tbody {
            display: table;
            width: 100%;
          }

          .lntd:last-child {
            width: 100%;
          }
        }

        .lntd:first-child,
        .ln {
          display: none;
        }
      }

      // line wrapping
      &.line-wrapping {
        > .chroma .lntable {
          width: 100%;
          display: table;

          // hide original line numbers
          .lntd:first-child {
            display: none;
          }
        }
        .lntd:last-child pre.chroma,
        .code-wrapper > pre.chroma {
          max-width: 100%;
          box-sizing: border-box;

          code {
            text-wrap: wrap;
            word-break: break-all;
            overflow-wrap: break-word;
          }
        }
      }

      // line numbers (pseudo-elements) for code blocks
      &.line-wrapping:not(.line-nos-hidden) .lntd:last-child pre.chroma,
      &:not(.line-nos-hidden) .code-wrapper > pre.chroma:not(:has(.ln)) {
        > code > .line {
          display: flex;

          &::before {
            counter-increment: codeNos;
            content: counter(codeNos);
            white-space: nowrap;
            text-align: right;
            width: calc(#{fi-var(line-digit)} * 1ch);
            min-width: 0.75rem;
            padding-inline: 0.75rem;
            flex-shrink: 0;
            color: fi-var(global-font-secondary-color);
            background-color: fi-var(code-block-background-color);
          }

          // highlight for line numbers
          &.hl::before {
            background-color: transparent;
          }
        }
      }

      // add sticky effect for line numbers when lineNos=false
      &:not(.line-nos-hidden) .code-wrapper > pre.chroma > code > .line::before {
        position: sticky;
        left: 0;
      }

      // when line numbers shown
      &:not(.line-nos-hidden) {
        .lntd:last-child pre.chroma:not([contenteditable='true']),
        .code-wrapper > pre.chroma:not(:has(.ln)) {
          padding-left: 0;
        }
      }

      // add border for non-classic mode
      &:not([data-mode='classic']) {
        border: 1px solid fi-var(global-border-color-light);
      }

      &[data-mode='mac'] {
        pre.chroma {
          padding-top: 1.875rem;

          &::after {
            background: fi-var(mac-red, #fc625d);
            box-shadow: 20px 0 fi-var(mac-yellow, #fdbc40), 40px 0 fi-var(mac-green, #35cd4b);
            left: 8px;
            top: 8px;
            position: absolute;
            content: ' ';
            height: 12px;
            width: 12px;
            @include border-radius(full);

            @include dark-mode {
              @include set-fi-vars((
                mac-red: #ff5f56,
                mac-yellow: #febc2e,
                mac-green: #28c840,
              ));
            }
          }
        }
      }

      &[data-mode='simple'] {
        pre.chroma {
          padding-block: 0.875rem;
        }
      }
    }
  }

  // Code Tabs
  .code-tabs {
    margin: 0.5rem 0;
    background-color: fi-var(code-block-background-color);
    border: 1px solid fi-var(global-border-color-light);
    @include border-radius;

    &[data-shadow='always'] {
      @include box-shadow(always);
    }

    &[data-shadow='hover'] {
      @include box-shadow(hover);
    }

    &:has(.code-block.active .code-expand-btn) {
      margin-bottom: 1rem;
    }

    &:has(.code-block.active.line-wrapping) .tabs-actions .line-wrap-btn,
    &:has(.code-block.active:not(.line-nos-hidden)) .tabs-actions .line-nos-btn,
    &:has(.code-block.active [contenteditable='true']) .tabs-actions .edit-btn {
      color: fi-var(global-link-hover-color);
    }

    .tabs-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      line-height: 1.4em;
      font-size: fi-var(code-block-font-size);
      color: fi-var(code-header-color);
      background-color: fi-var(code-header-background-color);
      position: sticky;
      border-bottom: 1px solid fi-var(global-border-color);
      @include z-index(base, 1);
      @include border-radius(top);
      @include sticky-top-offset;

      .tabs-items {
        display: flex;
        overflow-x: auto;
        position: relative;
        @include border-radius(top);

        .before-tabs {
          padding: 0.4rem 0.6rem;
          white-space: nowrap;
          color: fi-var(global-font-color);
        }

        .tab-item {
          padding: 0.4rem 0.8rem;
          cursor: pointer;
          font-weight: bold;
          color: fi-var(global-font-secondary-color);
          white-space: nowrap;
          user-select: none;
          position: relative;
          @include border-radius;

          &:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            translate: 0 -50%;
            width: 1px;
            height: fi-var(code-block-font-size);
            background-color: fi-var(global-border-color-weight);
          }

          // lighten dividers on both sides of the active tab
          &.active::after,
          &:has(+ .tab-item.active)::after {
            background-color: fi-var(global-border-color);
          }

          @include media('xs') {
            padding-inline: 0.6rem;
          }
        }

        &:not(:has(.tab-item:hover)) .tab-item.active,
        .tab-item:hover {
          anchor-name: #{$rootPrefix}tab-hover;
          color: fi-var(global-font-color);
        }

        &::before {
          content: '';
          position-anchor: #{$rootPrefix}tab-hover;
          position: absolute;
          inset: anchor(inside);
          translate: 2px 2px;
          width: calc(anchor-size(width) - 0.25rem);
          height: calc(anchor-size(height) - 0.25rem);
          box-shadow: inset 0 0 1rem 0.25rem light-dark(#fff, fi-rgba(fi-var(global-font-secondary-color), 0.4));
          pointer-events: none;
          transition: 0.3s ease-in-out;
          @include border-radius;
        }
      }

      .tabs-actions {
        display: flex;
        flex-shrink: 0;

        .action-btn {
          padding: 0.4rem;

          &:hover {
            color: fi-var(global-link-hover-color);
          }

          &.copy-btn[data-copied] .fa-clone {
            --fa: "\f00c";
            font-weight: 900;
            color: fi-var(global-link-hover-color);
          }

          &.download-btn[data-downloaded] .fa-download {
            --fa: "\f1ce";
            font-weight: 900;
            color: fi-var(global-link-hover-color);
          }
        }
      }

      @include media('print') {
        top: initial !important;
      }
    }

    .tabs-content {
      .code-block {
        display: none;
        margin: 0;
        @include border-radius(bottom);
        @include box-shadow(never);

        &.active {
          display: block;
        }

        // hide original header
        .code-header {
          display: none;
        }
      }
    }

    &.is-fullscreen {
      position: fixed;
      inset: 0;
      margin: 0 !important;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      @include z-index(fixed, 1);
      @include border-radius(0);

      .tabs-header {
        top: 0 !important;
        @include border-radius(0);
      }

      .tabs-content {
        flex: 1;
        min-height: 0;

        .code-block.active {
          height: 100%;
        }

        .code-wrapper {
          overflow: auto;
          height: calc(100dvh - 1.4em - 0.8rem);
        }
      }

      .code-expand-btn {
        display: none;
      }
    }
  }

  // prevent transition when code block height changed by fullscreen toggle
  .instant-height .code-wrapper {
    transition: height 0s !important;
  }
}