/*
Copyright 2020, 2021 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
Custom SCSS for the Matrix spec
*/

@import "variables_project";
@import "variables";

/* Import the CSS classes for the syntax highlighter.
 *
 * This is generated with:
 *
 *    hugo gen chromastyles --style=tango > assets/scss/syntax.scss
 */
@import "syntax.scss";

/* Workaround for https://github.com/google/docsy/issues/1116:
 * fix scroll-anchoring */
.td-outer {
    height: auto;
}

/* Overrides for the navbar */
.td-navbar {
  box-shadow: 0px 0px 8px rgba(179, 179, 179, 0.25);
  min-height: 5rem;

  .navbar-brand {
    font-size: 1.1rem;

    .navbar-version {
      color: $secondary;
    }

  }

  a {
    color: $black;
  }
}

/* Styles for the sidebar nav */
.td-sidebar {
    /* don't attempt to use the sidebar (or things in it) as a scroll anchor. */
    overflow-anchor: none;
}

.td-sidebar-nav {
  scroll-behavior: smooth;
  overscroll-behavior: contain;

  &>.td-sidebar-nav__section {
    margin-top: 1rem;
  }

  .td-sidebar-nav__section .ul-1 ul {
    padding-left: 0;
  }

  /* This is to make the width of the items that have sub-items (like room versions)
  the same as the width of items that don't (like changelog) */
  .pr-md-3, .px-md-3 {
    padding-right: 0 !important;
  }

  .ul-1 > li > a {
    padding-left: 1rem !important;
  }

  .ul-2 > li > a {
    padding-left: 2rem !important;
  }

  a.td-sidebar-link.tree-root {
    color: $gray-800;
    font-weight: $font-weight-bold;
    font-size: 1.3rem;
    margin-bottom: 0;
    border-bottom: none;
  }

  a, a.td-sidebar-link {
    color: $gray-800;
    font-weight: $font-weight-normal;
    padding-top: .2rem;
    padding-bottom: .2rem;

    display: block;
    transition: all 100ms ease-in-out;

    &:hover {
      background-color: $secondary-lighter-background;
      color: $gray-800;
    }

    &.active, &active:hover {
      background-color: $secondary-background;
    }
  }
}

@media (min-width: 768px) {
  @supports (position: sticky) {
    .td-sidebar-nav {
      /* This overrides calc(100vh - 10rem);, which gives us a blank space at the bottom of the sidebar */
      max-height: calc(100vh - 6rem);
    }
  }
}

/* Customise footer */
footer {
  box-shadow: 0px 0px 8px rgba(179, 179, 179, 0.25);
}

/* Auto numbering for headings */
.td-content {

  counter-reset: h2;

  &> h2 {
    counter-reset: h3
  }

  &> h3 {
    counter-reset: h4
  }

  &> h4 {
    counter-reset: h5
  }

  &> h5 {
    counter-reset: h6
  }

  &> h2:not(.no-numbers):before {
    display: inline; visibility: visible; counter-increment: h2; content: counter(h2) ". "
  }

  &> h3:not(.no-numbers):before {
    display: inline; visibility: visible; counter-increment: h3; content: counter(h2) "." counter(h3) ". "
  }

  &> h4:not(.no-numbers):before {
    display: inline; visibility: visible; counter-increment: h4; content: counter(h2) "." counter(h3) "." counter(h4) ". "
  }

  &> h5:not(.no-numbers):before {
    display: inline; visibility: visible; counter-increment: h5; content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) ". "
  }

  &> h6:not(.no-numbers):before {
    display: inline; visibility: visible; counter-increment: h6; content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "." counter(h6) ". "
  }

}

/* Adjust the scroll margin for everything in the main content, so that
 * it doesn't disappear behind the header bar */
.td-content * {
  scroll-margin-top: 5.5rem;
}

/* Styles for the table of contents */
#toc {
  padding-top: .5rem;
  padding-left: 1.5rem;

  ol {
    padding-left: 1rem;
    counter-reset: section;
    list-style-type: none;
  }

  #TableOfContents {
    &>ol>li {
      margin-bottom: .5rem;

      &>a {
        font-weight: $font-weight-bold;
      }
    }

    ol {
      padding-left: 0;
    }

    &>ol>li>a {
      padding-left: 1rem;
    }

    &>ol>li>ol>li>a {
      padding-left: 2rem;
    }

    &>ol>li>ol>li>ol>li>a {
      padding-left: 3rem;
    }

    &>ol>li>ol>li>ol>li>ol>li>a {
      padding-left: 4rem;
    }

    &>ol>li>ol>li>ol>li>ol>li>ol>li>a {
      padding-left: 5rem;
    }

  }

  li a:before {
    counter-increment: section;
    content: counters(section, ".") " ";
  }

  #toc-title {
    font-weight: $font-weight-bold;
    font-size: 1.3rem;
  }

}

/* Styles for alert boxes */
.alert {
  &.note {
    &:not(.omit-title):before {
      content: "INFO: ";
      font-weight: $font-weight-bold;
    }
    border: 2px solid $note;
    border-left-width: 5px;
    background: $note-background;
  }

  &.rationale {
    &:not(.omit-title):before {
      content: "RATIONALE: ";
      font-weight: $font-weight-bold;
    }
    border: 2px solid $note;
    border-left-width: 5px;
    background: $note-background;
  }

  &.warning {
    &:not(.omit-title):before {
      content: "WARNING: ";
      font-weight: $font-weight-bold;
    }
    border: 2px solid $warning;
    border-left-width: 5px;
    background: $warning-background;
  }

  // XXX: See the added-in-paragraph.html shortcode for more information on these styles.
  &.added-in-paragraph {
    // Remove the padding and margin to remove the box look
    margin: 0 !important; // !important on both to override table-related rules
    padding: 0 !important;

    // Make pairs of "added-in" and content inline to each other. We do pairs so authors can
    // describe two paragraphs with added-in prefixes within a single box, reducing DOM
    // complexity. Each paragraph is expected to be prefixed with an added-in, however.
    //
    // XXX: We assume the added-in and text will be rendered as paragraph elements.
    > p {
      display: inline;
    }
    > p:nth-child(2n) { // "even" rule to target just the content paragraphs
      // Force a paragraph break after the content (insert a couple <br /> tags)
      &::after {
        content: '\A\A';
        white-space: pre;
      }
    }
  }
}

/* Styles for sections that are rendered from data, such as HTTP APIs and event schemas */
.rendered-data {
  background-color: $secondary-lightest-background;
  padding: 0.85rem;
  margin: 0.85rem 0;

  details {
    summary {
      h1 {
        margin: 0;
        /* Ensure the disclosure control is vertically centred with the header text. */
        vertical-align: middle;
      }
    }
    p {
      max-width: 80%;
    }
  }

  .deprecated-inline {

    &:after {
      content: " — DEPRECATED";
      color: $warning;
      font-weight: $font-weight-bold;
    }
  }

  h1 {
    display: inline-block;
    font-size: 1.3rem;

    .endpoint {
      color: $secondary;
    }
  }

  h2 {
    font-weight: $font-weight-bold;
    font-size: 1.3rem;
    margin: 3rem 0 .5rem 0;
  }

  h3 {
    font-weight: $font-weight-bold;
    font-size: 1.1rem;
    margin: 1.5rem 0 .75rem 0;
  }

  hr {
    border-bottom: 2px solid $dark;
    margin-bottom: 1.5rem;
  }

  p code, table code {
    background-color: inherit;
  }

  table {
    @media (max-width: 800px) {
      /* Docsy by default applies `overflow-x: auto;` to tables, which
       * results in annoying horizontal scrolling on mobile, so we instead
       * switch to a fixed table layout on a narrow browser width.
       * (On a wider width the default auto table-layout provides better readability.)
       *
       * Docsy makes all tables "responsive tables", which causes Bootstrap 4 to create
       * tables with a "display" property of "block".
       * However, for "table-layout: fixed" to be effective, an element must have a
       * "display" property of "table".
       *
       * Thus, we override the "display" property here. This may no longer be necessary once
       * Docsy updates to Bootstrap v5+: https://github.com/google/docsy/issues/470.
       * For more details, see
       * https://github.com/matrix-org/matrix-spec/pull/1295/files#r1010759688 */
      display: table;
      table-layout: fixed;
      width: 100%;

      .col-name, .col-type, .col-status {
        width: 25%;
      }

      .col-description {
        width: 50%;
      }

      .col-status-description {
        width: 75%;
      }
    }

    // add some space between two tables when they are right next to each other
    & + table {
        margin-top: 4rem;
    }

    caption {
      caption-side: top;
      color: $dark;
      font-size: 1rem;
      font-weight: $font-weight-bold;
    }

    th, td, caption {
      padding: 1rem;
    }

    &.object-table, &.response-table, &.content-type-table {
        border: 1px $table-border-color solid;

        caption {
            // the caption is outside the table's border box,
            // so we have to give it its own border.
            border: 1px $table-border-color solid;

            // ... but avoid double border between caption and table
            border-bottom: 0;
        }

        caption, tbody tr {
            background-color: $table-row-default;
        }

        tbody tr:nth-child(even) {
            background-color: $table-row-alternate;
        }
    }

    &.basic-info, &.basic-info th, &.basic-info td {
      table-layout: fixed;
      margin: 1rem 0 .5rem 0;
    }

    &.basic-info th {
      width: 15rem;
    }
  }

  pre {
    border: 0;
    border-left: solid 5px $secondary;
  }

  .http-api-method {
    font-weight: $font-weight-bold;
  }

}

/* Miscellaneous custom bits */

/* Update link colours for MAtrix style */
a, a:hover {
  color: $secondary;
}

/* This is needed to stop the bottom of the Matrix icon from getting snipped off. */
.td-navbar .navbar-brand svg {
  height: 32px;
}

/* Give code samples and pre elements full-width */
.td-content > .highlight, .td-content > pre {
  max-width: 100%;
}

/* The default CSS applies a style for blockquotes but only to immediate children
of .td-content. This applies the same style to any blockquotes that descend from
.td-content. */
.td-content blockquote {
  padding: 0 0 0 1rem;
  margin-bottom: $spacer;
  color: $gray-600;
  border-left: 6px solid $secondary;
}

/*
Make padding symmetrical (this selector is used in the default styles to apply padding-left: 3rem)
*/
.pl-md-5, .px-md-5 {
  padding-right: 3rem;
}

/* Adjust default styles for info banner */
.pageinfo-primary {
  max-width: 80%;
  margin-left: 0;
  border: 0;
  border-left: solid 5px $secondary;
  background-color: $gray-100;
}

.pageinfo-unstable {
  background-image: url('../icons/unstable.png');
  background-position: left 1rem center;
  background-repeat: no-repeat;
  padding-left: 100px;
}

/* Adjust the styling of definition lists. */

/* Add a little spacing between the term and its definition. */
dt {
   margin-bottom: 0.15rem;
}

/* _reboot.scss deliberately sets margin-left to 0. Undo this. */
dd {
  margin-left: 2rem;
}

/* docsy's _code.scss does only styles <code> elements matching
 * .td-content { p code, li > code, table code }.
 * Copy those styles here to apply to code <elements> in definition terms too. */

.td-content {
  dt code {
    color: inherit;
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    word-break: normal;
    background-color: rgba($black, 0.05);
    border-radius: 0.25rem;  // was $border-radius, but that var isn't accessible here.
  }
}