FixIt/assets/css/_page/_single/_code.scss

// inline code
code {
  @extend %code;
}

// indented code
pre {
  margin: 0;
  line-height: 1.45em;
  padding: 0.5rem 0.75rem;
  overflow: auto;
  font-size: fixit-var(code-block-font-size);
  font-family: fixit-var(code-font-family);
  background-color: fixit-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);

    [data-theme=dark] & {
      background-color: transparent;
    }
  }

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

.highlight,
.gist {
  font-size: fixit-var(code-block-font-size);
  font-family: fixit-var(code-font-family);
  @include set-fixit-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: fixit-var(code-block-background-color);
    @include border-radius;

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

    .lntable {
      overflow: auto;
      display: block;
      background-color: fixit-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=false)
  .ln {
    padding-right: 0.75rem;
    display: inline-block;
    text-align: right;
    position: sticky;
    left: 0;
  }
  // Line numbers
  .lnt,
  .ln {
    color: fixit-var(secondary);
    @include 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);
    }

    &.instant-height .code-wrapper {
      transition: height 0s !important;
    }

    .code-wrapper {
      overflow: hidden;
      height: auto;
      position: relative;
      counter-reset: codeNos calc(#{fixit-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-fixit-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),
      ));
    }

    // code preview
    &:has(.code-expand-btn):not(.is-expanded, .is-collapsed) {
      .code-wrapper {
        height: calc(1.45em * #{fixit-var(max-shown-lines)} + #{fixit-var(code-expand-offset, 0.5rem)});
      }
      &[data-mode='mac'] .code-wrapper {
        @include set-fixit-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: fixit-var(global-font-family);
      font-weight: bold;
      line-height: 1.4em;
      color: fixit-var(code-header-color);
      background-color: fixit-var(code-header-background-color);
      position: sticky;
      top: fixit-var(breadcrumb-height);
      transition: border-radius 0s;
      cursor: pointer;
      @include z-index(base);
      @include border-radius(top);

      + .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, fixit-var(code-type, 'Code'));
        }

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

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

        .title-inner {
          position: absolute;
          left: 50%;
          transform: translateX(-50%);
          background-color: fixit-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, 1);
        }
      }

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

      [role='button'] {
        padding: 0.4rem;

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

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

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

      .fullscreen-btn[data-fullscreen] .fa-expand {
        --fa: "\f066";
        font-weight: 900;
        color: fixit-var(global-link-hover-color);
      }

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

      [data-header-desktop='sticky'] & {
        @include media('sm', 'up') {
          top: calc(#{fixit-var(header-height)} + #{fixit-var(breadcrumb-height)});
        }
      }

      [data-header-mobile='sticky'] & {
        @include media('xs') {
          top: calc(#{fixit-var(header-height)} + #{fixit-var(breadcrumb-height)});
        }
      }

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

    &.line-wrapping .line-wrap-btn,
    &:not(.line-nos-hidden) .line-nos-btn,
    .code-header [role='button']:hover,
    &:has([contenteditable='true']) .edit-btn {
      color: fixit-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,
        rgba($code-background-color, 0) 0%,
        rgba($code-background-color, 0.9) 60%,
        $code-background-color 100%
      );
      @include z-index(base);
      @include border-radius(bottom);

      [data-theme=dark] & {
        background: linear-gradient(
          180deg,
          rgba($code-background-color-dark, 0) 0%,
          rgba($code-background-color-dark, 0.9) 60%,
          $code-background-color-dark 100%
        );
      }

      .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;
      }
    }

    .code-copy-btn {
      @extend .diagram-copy-btn;
    }

    // classic mode code block collapsed
    &.is-collapsed {
      .code-header {
        transition: border-radius 0.2s ease 0.2s;
        @include set-fixit-var(code-header-background-color, darken($code-background-color, 6%));
        @include border-radius;

        [data-theme=dark] & {
          @include set-fixit-var(code-header-background-color, darken($code-background-color-dark, 6%));
        }

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

      .arrow {
        transform: 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;
        transform: translateY(1rem);

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

          @keyframes fadeOutRotate {
            0% {
              opacity: 1;
              transform: rotate(180deg);
            }
            100% {
              opacity: 0;
              transform: rotate(180deg) translate3d(0, 100%, 0);
            }
          }
        }
      }
    }

    // hide original line numbers
    &.line-nos-hidden {
      > .chroma .lntable {
        width: 100%;
        display: table;
      }
      .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;
          min-width: calc(#{fixit-var(line-digit)} * 1ch);
          padding-inline: 0.75rem;
          flex-shrink: 0;
          color: fixit-var(secondary);
          background-color: fixit-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,
      .code-wrapper > pre.chroma:not(:has(.ln)) {
        padding-left: 0;
      }
    }

    // add border for non-classic mode
    &:not([data-mode='classic']) {
      border: 1px solid darken($code-background-color, 3%);

      [data-theme=dark] & {
        border-color: darken($code-background-color-dark, 3%);
      }
    }

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

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

          [data-theme=dark] & {
            @include set-fixit-vars((
              mac-red: #ff5f56,
              mac-yellow: #febc2e,
              mac-green: #28c840,
            ));
          }
        }
      }
    }

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

    // for code tabs, only show the first tab content before JS loaded
    &[data-hidden] {
      display: none;
    }
  }
}

@import './_code-syntax';

// gist shortcode
.gist {
  background-color: fixit-var(code-block-background-color);
  @include border-radius(top);
  
  .gist-file,
  .gist-data,
  .gist-meta {
    border: none;
  }

  .gist-data {
    background-color: inherit;

    .blob-wrapper {
      padding-block: 0.5rem;

      table.highlight {
        background-color: inherit;
        overflow: initial;

        td.blob-num {
          position: sticky;
          left: 0;
          background-color: fixit-var(code-block-background-color);
          @include z-index(base);
        }

        td.blob-code {
          padding-left: 2px !important;
        }
      }
    }
  }

  .gist-meta {
    padding: 0.4rem 0.8rem;
    @include link(false, false);
    @include border-radius(bottom);
    background-color: fixit-var(gist-meta-background-color);
  }

  [data-theme=dark] & {
    @import './_code-syntax/github-dark-dimmed';
  }
}

// Code Tabs
.code-tabs {
  margin: 0.5rem 0;
  background-color: fixit-var(code-block-background-color);
  border: 1px solid fixit-var(global-border-color);
  @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: fixit-var(global-link-hover-color);
  }

  .tabs-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    line-height: 1.4em;
    font-size: fixit-var(code-block-font-size);
    color: fixit-var(code-header-color);
    background-color: fixit-var(code-header-background-color);
    position: sticky;
    top: fixit-var(breadcrumb-height);
    @include z-index(base);
    @include border-radius(top);

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

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

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

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

      &:not(:has(.tab-item:hover)) .tab-item.active,
      .tab-item:hover {
        anchor-name: #{$rootPrefix}tab-hover;
        color: fixit-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 color-mix(in srgb, fixit-var(secondary) 30%, transparent);
        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: fixit-var(global-link-hover-color);
        }

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

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

        &.fullscreen-btn {
          display: none;
        }
      }
    }

    [data-header-desktop='sticky'] & {
      @include media('sm', 'up') {
        top: calc(#{fixit-var(header-height)} + #{fixit-var(breadcrumb-height)});
      }
    }

    [data-header-mobile='sticky'] & {
      @include media('xs') {
        top: calc(#{fixit-var(header-height)} + #{fixit-var(breadcrumb-height)});
      }
    }

    @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;
      }
    }
  }
}