////
/// Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
///
/// Permission is hereby granted, free of charge, to any person obtaining a
/// copy of this software and associated documentation files (the "Software"),
/// to deal in the Software without restriction, including without limitation
/// the rights to use, copy, modify, merge, publish, distribute, sublicense,
/// and/or sell copies of the Software, and to permit persons to whom the
/// Software is furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
/// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
/// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
/// DEALINGS
////

// ----------------------------------------------------------------------------
// Rules: syntax highlighting
// ----------------------------------------------------------------------------

// Code block
.highlight {

  // .o  = Operator
  // .ow = Operator, word
  :is(.o, .ow) {
    color: var(--md-code-hl-operator-color);
  }

  .p {  // Punctuation
    color: var(--md-code-hl-punctuation-color);
  }

  // .cpf = Comment, preprocessor file
  // .l   = Literal
  // .s   = Literal, string
  // .sb  = Literal, string backticks
  // .sc  = Literal, string char
  // .s2  = Literal, string double
  // .si  = Literal, string interpol
  // .s1  = Literal, string single
  // .ss  = Literal, string symbol
  :is(.cpf, .l, .s, .sb, .sc, .s2, .si, .s1, .ss) {
    color: var(--md-code-hl-string-color);
  }

  // .cp = Comment, pre-processor
  // .se = Literal, string escape
  // .sh = Literal, string heredoc
  // .sr = Literal, string regex
  // .sx = Literal, string other
  :is(.cp, .se, .sh, .sr, .sx) {
    color: var(--md-code-hl-special-color);
  }

  // .m  = Number
  // .mb = Number, binary
  // .mf = Number, float
  // .mh = Number, hex
  // .mi = Number, integer
  // .il = Number, integer long
  // .mo = Number, octal
  :is(.m, .mb, .mf, .mh, .mi, .il, .mo) {
    color: var(--md-code-hl-number-color);
  }

  // .k  = Keyword,
  // .kd = Keyword, declaration
  // .kn = Keyword, namespace
  // .kp = Keyword, pseudo
  // .kr = Keyword, reserved
  // .kt = Keyword, type
  :is(.k, .kd, .kn, .kp, .kr, .kt) {
    color: var(--md-code-hl-keyword-color);
  }

  // .kc = Keyword, constant
  // .n  = Name
  :is(.kc, .n) {
    color: var(--md-code-hl-name-color);
  }

  // .no = Name, constant
  // .nb = Name, builtin
  // .bp = Name, builtin pseudo
  :is(.no, .nb, .bp) {
    color: var(--md-code-hl-constant-color);
  }

  // .nc = Name, class
  // .ne = Name, exception
  // .nf = Name, function
  // .nn = Name, namespace
  :is(.nc, .ne, .nf, .nn) {
    color: var(--md-code-hl-function-color);
  }

  // .nd = Name, decorator
  // .ni = Name, entity
  // .nl = Name, label
  // .nt = Name, tag
  :is(.nd, .ni, .nl, .nt) {
    color: var(--md-code-hl-keyword-color);
  }

  // .c  = Comment
  // .cm = Comment, multiline
  // .c1 = Comment, single
  // .ch = Comment, shebang
  // .cs = Comment, special
  // .sd = Literal, string doc
  :is(.c, .cm, .c1, .ch, .cs, .sd) {
    color: var(--md-code-hl-comment-color);
  }

  // .na = Name, attribute
  // .nv = Variable,
  // .vc = Variable, class
  // .vg = Variable, global
  // .vi = Variable, instance
  :is(.na, .nv, .vc, .vg, .vi) {
    color: var(--md-code-hl-variable-color);
  }

  // .ge = Generic, emph
  // .gr = Generic, error
  // .gh = Generic, heading
  // .go = Generic, output
  // .gp = Generic, prompt
  // .gs = Generic, strong
  // .gu = Generic, subheading
  // .gt = Generic, traceback
  :is(.ge, .gr, .gh, .go, .gp, .gs, .gu, .gt) {
    color: var(--md-code-hl-generic-color);
  }

  // .gd = Diff, delete
  // .gi = Diff, insert
  :is(.gd, .gi) {
    padding: 0 px2em(2px);
    margin: 0 px2em(-2px);
    border-radius: px2rem(2px);
  }

  .gd { // Diff, delete
    background-color: var(--md-typeset-del-color);
  }

  .gi { // Diff, insert
    background-color: var(--md-typeset-ins-color);
  }

  // Highlighted line
  .hll {
    display: block;
    padding: 0 px2em(16px, 13.6px);
    margin: 0 px2em(-16px, 13.6px);
    background-color: var(--md-code-hl-color--light);
    box-shadow: 2px 0 0 0 var(--md-code-hl-color) inset;
  }

  // Code block title
  span.filename {
    position: relative;
    display: flow-root;
    padding: px2em(9px, 13.6px) px2em(16px, 13.6px);
    margin-top: 1em;
    font-size: px2em(13.6px);
    font-weight: 700;
    background-color: var(--md-code-bg-color);
    border-bottom: px2rem(1px) solid var(--md-default-fg-color--lightest);
    border-top-left-radius: px2rem(2px);
    border-top-right-radius: px2rem(2px);

    // Adjust spacing for code block
    + pre {
      margin-top: 0;

      // Remove rounded border on top side
      > code {
        border-top-left-radius: 0;
        border-top-right-radius: 0;
      }
    }
  }

  // Code block line numbers (pymdownx-inline)
  [data-linenos]::before {
    position: sticky;
    left: px2em(-16px, 13.6px);
    // A `z-index` of 3 is necessary for ensuring that code block annotations
    // don't overlay line numbers, as active annotations have a `z-index` of 2.
    z-index: 3;
    float: left;
    padding-left: px2em(16px, 13.6px);
    margin-right: px2em(16px, 13.6px);
    margin-left: px2em(-16px, 13.6px);
    color: var(--md-default-fg-color--light);
    content: attr(data-linenos);
    user-select: none;
    background-color: var(--md-code-bg-color);
    box-shadow: px2rem(-1px) 0 var(--md-default-fg-color--lightest) inset;
  }

  // Code block line anchors - Chrome and Safari seem to have a strange bug
  // where scroll margin is not applied to anchors inside code blocks. Setting
  // positioning to absolute seems to fix the problem. Interestingly, this does
  // not happen in Firefox. Furthermore we must set `visibility: hidden` or
  // the copy to clipboard functionality will include an empty line between
  // each set of lines.
  code a[id] {
    position: absolute;
    visibility: hidden;
  }

  // Copying in progress - this class is set before the content is copied and
  // removed after copying is done to mitigate whitespace-related issues.
  code[data-md-copying] {

    // Temporarily remove highlighted lines - see https://bit.ly/32iVGWh
    .hll {
      display: contents;
    }

    // Temporarily remove annotations
    .md-annotation {
      display: none;
    }
  }
}

// ----------------------------------------------------------------------------
// Rules: layout
// ----------------------------------------------------------------------------

// Code block with line numbers
.highlighttable {
  display: flow-root;

  // Set table elements to block layout, because otherwise the whole flexbox
  // hacking won't work correctly
  :is(tbody, td) {
    display: block;
    padding: 0;
  }

  // We need to use flexbox layout, because otherwise it's not possible to
  // make the code container scroll while keeping the line numbers static
  tr {
    display: flex;
  }

  // The pre tags are nested inside a table, so we need to omit the margin
  // because it collapses below all the overflows
  pre {
    margin: 0;
  }

  // Code block title container
  th.filename {
    flex-grow: 1;
    padding: 0;
    text-align: left;

    // Adjust spacing
    span.filename {
      margin-top: 0;
    }
  }

  // Code block line numbers - disable user selection, so code can be easily
  // copied without accidentally also copying the line numbers
  .linenos {
    padding: px2em(10.5px, 13.6px) px2em(16px, 13.6px);
    padding-right: 0;
    font-size: px2em(13.6px);
    user-select: none;
    background-color: var(--md-code-bg-color);
    border-top-left-radius: px2rem(2px);
    border-bottom-left-radius: px2rem(2px);
  }

  // Code block line numbers container
  .linenodiv {
    padding-right: px2em(8px, 13.6px);
    box-shadow: px2rem(-1px) 0 var(--md-default-fg-color--lightest) inset;

    // Adjust colors and alignment
    pre {
      color: var(--md-default-fg-color--light);
      text-align: right;
    }
  }

  // Code block container - stretch to remaining space
  .code {
    flex: 1;
    min-width: 0;
  }
}

// Code block line numbers container
.linenodiv a {
  color: inherit;
}

// ----------------------------------------------------------------------------

// Scoped in typesetted content to match specificity of regular content
.md-typeset {

  // Code block with line numbers - unfortunately, these selectors need to be
  // overly specific so they don't bleed into code blocks in annotations.
  .highlighttable {
    margin: 1em 0;
    direction: ltr;

    // Remove rounded borders on code blocks
    > tbody > tr > .code > div > pre > code {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
    }
  }

  // Code block result container
  .highlight + .result {
    padding: 0 px2em(16px);
    margin-top: calc(-1em + #{px2em(-2px)});
    overflow: visible;
    border: px2rem(1px) solid var(--md-code-bg-color);
    border-top-width: px2rem(2px);
    border-bottom-right-radius: px2rem(2px);
    border-bottom-left-radius: px2rem(2px);

    // Clearfix, because we can't use overflow: auto
    &::after {
      display: block;
      clear: both;
      content: "";
    }
  }
}

// ----------------------------------------------------------------------------
// Rules: top-level
// ----------------------------------------------------------------------------

// [mobile -]: Align with body copy
@include break-to-device(mobile) {

  // Top-level code block
  .md-content__inner > .highlight {
    margin: 1em px2rem(-16px);

    // Remove rounded borders
    > .filename,
    > pre > code {
      border-radius: 0;
    }

    // Code block with line numbers - unfortunately, these selectors need to be
    // overly specific so they don't bleed into code blocks in annotations.
    > .highlighttable > tbody > tr > .filename span.filename,
    > .highlighttable > tbody > tr > .linenos,
    > .highlighttable > tbody > tr > .code > div > pre > code {
      border-radius: 0;
    }

    // Code block result container
    + .result {
      margin-inline: px2rem(-16px);
      border-inline-width: 0;
      border-radius: 0;
    }
  }
}
