signal-desktop/stylesheets/_mixins.scss

// Copyright 2016 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

// Fonts

@mixin localized-fonts {
  /* Japanese */
  &:lang(ja) {
    font-family: Inter, 'SF Pro', 'SF Pro JP', 'BIZ UDGothic',
      'Hiragino Kaku Gothic Pro', 'ヒラギノ角ゴ Pro W3', メイリオ, Meiryo,
      'ＭＳ Ｐゴシック', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  }
  /* Farsi (Persian) */
  &:lang(fa) {
    font-family:
      'Vazirmatn',
      -apple-system,
      system-ui,
      BlinkMacSystemFont,
      'Segoe UI',
      Tahoma,
      'Noto Sans Arabic',
      Helvetica,
      Arial,
      sans-serif;
  }
  /* Urdu */
  &:lang(ur) {
    font-family: 'Noto Nastaliq Urdu', Gulzar, 'Jameel Noori Nastaleeq',
      'Faiz Lahori Nastaleeq', 'Urdu Typesetting', Helvetica, Arial, sans-serif;
  }
}

@mixin font-family {
  font-family: $inter;
  @include localized-fonts;
}

@mixin time-fonts {
  font-family: Hatsuishi, $inter;
  @include localized-fonts;
}

@mixin font-title-1 {
  font-weight: 600;
  font-size: 26px;
  line-height: 32px;
  letter-spacing: -0.56px;
}

@mixin font-title-2 {
  font-weight: 600;
  font-size: 20px;
  line-height: 26px;
  letter-spacing: -0.34px;
}

@mixin font-title-medium {
  font-weight: 600;
  font-size: 18px;
  line-height: 25px;
  letter-spacing: -0.25px;
}

@mixin font-body-1 {
  font-size: 14px;
  line-height: 20px;
  letter-spacing: -0.08px;
}
@mixin font-body-1-bold {
  @include font-body-1;
  font-weight: 600;
}
@mixin font-body-1-italic {
  @include font-body-1;
  font-style: italic;
}
@mixin font-body-1-bold-italic {
  @include font-body-1;
  font-weight: 600;
  font-style: italic;
}

@mixin font-body-2 {
  font-size: 13px;
  line-height: 18px;
  letter-spacing: -0.03px;
}
@mixin font-body-2-bold {
  @include font-body-2;
  font-weight: 600;
}
@mixin font-body-2-medium {
  @include font-body-2;
  font-weight: 500;
}
@mixin font-body-2-italic {
  @include font-body-2;
  font-style: italic;
}
@mixin font-body-2-bold-italic {
  @include font-body-2;
  font-weight: 600;
  font-style: italic;
}

@mixin font-subtitle {
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0;
}
@mixin font-subtitle-bold {
  @include font-subtitle;
  font-weight: 600;
}

@mixin font-caption {
  font-size: 11px;
  line-height: 14px;
  letter-spacing: 0.06px;
}
@mixin font-caption-bold {
  @include font-caption;
  font-weight: 600;
}
@mixin font-caption-bold-italic {
  @include font-caption;
  font-weight: 600;
  font-style: italic;
}

// Themes

@mixin light-theme() {
  @content;
}

@mixin explicit-light-theme() {
  .light-theme & {
    @content;
  }
}

@mixin dark-theme() {
  .dark-theme & {
    @content;
  }
}

@mixin any-theme {
  &,
  .dark-theme & {
    @content;
  }
}

// Utilities

@mixin rounded-corners() {
  // This ensures the borders are completely rounded. (A value like 100% would make it an ellipse.)
  border-radius: 9999px;
}

@mixin smooth-scroll() {
  scroll-behavior: smooth;

  @media (prefers-reduced-motion) {
    scroll-behavior: auto;
  }
}

// NOTE: As of this writing, this mixin only works in the main window, because this class
//   is only applied there.
@mixin only-when-page-is-visible {
  .page-is-visible & {
    @content;
  }
}

// Search results loading

@mixin search-results-loading-pulsating-background {
  animation: search-results-loading-pulsating-background-animation 2s infinite;

  @media (prefers-reduced-motion) {
    animation: none;
  }

  @include light-theme {
    background: $color-gray-05;
  }
  @include dark-theme {
    background: $color-gray-65;
  }
}

@keyframes search-results-loading-pulsating-background-animation {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
  100% {
    opacity: 1;
  }
}

@mixin search-results-loading-box($width) {
  width: $width;
  height: 12px;
  border-radius: 4px;
  @include search-results-loading-pulsating-background;
}

// Icons

@function str-replace($string, $search, $replace: '') {
  $index: str-index($string, $search);

  @if $index {
    @return (
      str-slice($string, 1, $index - 1) + $replace +
        str-replace(
          str-slice($string, $index + str-length($search)),
          $search,
          $replace
        )
    );
  }

  @return $string;
}

$rtl-icon-map: (
  'chevron-left-16.svg': 'chevron-right-16.svg',
  'chevron-right-16.svg': 'chevron-left-16.svg',

  'chevron-left-20.svg': 'chevron-right-20.svg',
  'chevron-right-20.svg': 'chevron-left-20.svg',

  'chevron-left-24.svg': 'chevron-right-24.svg',
  'chevron-right-24.svg': 'chevron-left-24.svg',

  'arrow-left-32.svg': 'arrow-right-32.svg',
  'arrow-right-32.svg': 'arrow-left-32.svg',

  // v3 icons
  'chevron-left.svg': 'chevron-right.svg',
  'chevron-right.svg': 'chevron-left.svg',
  'chevron-shallow-left.svg': 'chevron-shallow-right.svg',
  'chevron-shallow-right.svg': 'chevron-shallow-left.svg',
  'chevron-left-compact-bold.svg': 'chevron-right-compact-bold.svg',
  'chevron-right-compact-bold.svg': 'chevron-left-compact-bold.svg',
  'chevron-right-bold.svg': 'chevron-left-bold.svg',
  'arrow-left.svg': 'arrow-right.svg',
  'arrow-right.svg': 'arrow-left.svg',

  // Ignored cases:
  'phone-right-outline-24.svg': '',
  'phone-right-solid-24.svg': '',
);

@function get-rtl-svg($svg) {
  @each $ltr, $rtl in $rtl-icon-map {
    @if str-index($svg, $ltr) {
      @if $rtl == '' {
        @return $ltr;
      }
      @return str-replace($svg, $ltr, $rtl);
    }
  }
  @if str-index($svg, 'left') or str-index($svg, 'right') {
    @error "Missing RTL icon for #{$svg}";
  }
  @return false;
}

@mixin color-svg($svg, $color, $stretch: true, $mask-origin: null) {
  -webkit-mask: url($svg) no-repeat center;
  @if $stretch {
    -webkit-mask-size: 100%;
  }
  @if $mask-origin {
    -webkit-mask-origin: $mask-origin;
  }
  background-color: $color;
  @media (forced-colors: active) {
    background-color: WindowText;
  }
  $rtl-svg: get-rtl-svg($svg);
  @if $rtl-svg {
    :dir(rtl) & {
      -webkit-mask: url($rtl-svg) no-repeat center;
    }
  }
}

// Keyboard

@mixin keyboard-mode() {
  .keyboard-mode & {
    @content;
  }
}

@mixin mouse-mode() {
  .mouse-mode & {
    @content;
  }
}

@mixin dark-keyboard-mode() {
  .dark-theme.keyboard-mode & {
    @content;
  }
}

@mixin dark-mouse-mode() {
  .dark-theme.mouse-mode & {
    @content;
  }
}

// Other

@mixin popper-shadow() {
  box-shadow:
    0px 8px 20px rgba(0, 0, 0, 0.3),
    0px 0px 8px rgba(0, 0, 0, 0.05);

  @media (forced-colors: active) {
    border: 1px solid WindowText;
  }
}

@mixin button-reset {
  background: none;
  color: inherit;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  cursor: pointer;
  outline: inherit;
  text-align: inherit;

  @media (forced-colors: active) {
    border: 1px solid WindowText;
  }
}

@mixin staged-attachment-close-button {
  @include button-reset;

  position: absolute;
  top: 4px;
  inset-inline-end: 4px;
  width: 16px;
  height: 16px;
  z-index: $z-index-above-base;
}

@mixin calling-text-shadow {
  text-shadow: 0 0 4px $color-black-alpha-40;
}

@mixin lonely-local-video-preview {
  max-height: calc(100% - 24px);
  height: auto;
  transform: rotateY(180deg);
  width: calc(100% - 24px);
  border-radius: 8px;
}

// --- Buttons

// Individual traits

@mixin button-focus-outline {
  &:focus {
    @include keyboard-mode {
      box-shadow: 0px 0px 0px 3px $color-ultramarine;
    }
    @include dark-keyboard-mode {
      box-shadow: 0px 0px 0px 3px $color-ultramarine-light;
    }
  }
}

@mixin button-blue-text {
  @include light-theme {
    color: $color-ultramarine;
  }
  @include dark-theme {
    color: $color-ultramarine-light;
  }
}

// Complete button styles

@mixin button-primary {
  background-color: $color-ultramarine;

  // Note: the background colors here need to match the parent component
  @include light-theme {
    color: $color-white;
    border: 1px solid white;
  }
  @include dark-theme {
    color: $color-white-alpha-90;
    border: 1px solid $color-gray-95;
  }

  &:hover {
    @include mouse-mode {
      background-color: mix($color-black, $color-ultramarine, 15%);
    }

    @include dark-mouse-mode {
      background-color: mix($color-white, $color-ultramarine, 15%);
    }
  }

  &:active {
    // We need to include all four here for specificity precedence

    @include mouse-mode {
      background-color: mix($color-black, $color-ultramarine, 25%);
    }
    @include dark-mouse-mode {
      background-color: mix($color-white, $color-ultramarine, 25%);
    }

    @include keyboard-mode {
      background-color: mix($color-black, $color-ultramarine, 25%);
    }
    @include dark-keyboard-mode {
      background-color: mix($color-black, $color-ultramarine, 25%);
    }
  }

  @include button-focus-outline;
}

@mixin button-secondary {
  @include light-theme {
    color: $color-gray-90;
    background-color: $color-gray-05;
  }
  @include dark-theme {
    color: $color-gray-05;
    background-color: $color-gray-65;
  }

  &:hover {
    @include mouse-mode {
      background-color: mix($color-black, $color-gray-05, 15%);
    }

    @include dark-mouse-mode {
      background-color: mix($color-white, $color-gray-65, 15%);
    }
  }

  &:active {
    // We need to include all four here for specificity precedence

    @include mouse-mode {
      background-color: mix($color-black, $color-gray-05, 25%);
    }
    @include dark-mouse-mode {
      background-color: mix($color-white, $color-gray-65, 25%);
    }

    @include keyboard-mode {
      background-color: mix($color-black, $color-gray-05, 25%);
    }
    @include dark-keyboard-mode {
      background-color: mix($color-white, $color-gray-65, 25%);
    }
  }

  @include button-focus-outline;
}

@mixin button-secondary-blue-text {
  @include button-secondary;
  @include button-blue-text;
}

@mixin button-light {
  @include light-theme {
    color: $color-gray-90;
    background-color: $color-gray-02;
  }
  @include dark-theme {
    color: $color-gray-05;
    background-color: $color-gray-75;
  }

  &:hover {
    @include mouse-mode {
      background-color: mix($color-black, $color-gray-02, 10%);
    }

    @include dark-mouse-mode {
      background-color: mix($color-white, $color-gray-75, 10%);
    }
  }

  &:active {
    // We need to include all four here for specificity precedence

    @include mouse-mode {
      background-color: mix($color-black, $color-gray-02, 20%);
    }
    @include dark-mouse-mode {
      background-color: mix($color-white, $color-gray-75, 20%);
    }

    @include keyboard-mode {
      background-color: mix($color-black, $color-gray-02, 20%);
    }
    @include dark-keyboard-mode {
      background-color: mix($color-white, $color-gray-75, 20%);
    }
  }

  @include button-focus-outline;
}

@mixin button-light-blue-text {
  @include button-light;
  @include button-blue-text;
}

@mixin button-destructive {
  @include light-theme {
    color: $color-white;
    background-color: $color-accent-red;
  }
  @include dark-theme {
    color: $color-white-alpha-90;
    background-color: $color-accent-red;
  }

  &:hover {
    @include mouse-mode {
      background-color: mix($color-black, $color-accent-red, 15%);
    }

    @include dark-mouse-mode {
      background-color: mix($color-white, $color-accent-red, 15%);
    }
  }

  &:active {
    // We need to include all four here for specificity precedence

    @include mouse-mode {
      background-color: mix($color-black, $color-accent-red, 25%);
    }
    @include dark-mouse-mode {
      background-color: mix($color-white, $color-accent-red, 25%);
    }

    @include keyboard-mode {
      background-color: mix($color-black, $color-accent-red, 25%);
    }
    @include dark-keyboard-mode {
      background-color: mix($color-white, $color-accent-red, 25%);
    }
  }

  @include button-focus-outline;
}

@mixin button-green {
  $background-color: $color-accent-green;

  background-color: $background-color;
  color: $color-white;

  &:active {
    // We need to include all four here for specificity precedence

    @include mouse-mode {
      background-color: mix($color-black, $background-color, 25%);
    }
    @include dark-mouse-mode {
      background-color: mix($color-white, $background-color, 25%);
    }

    @include keyboard-mode {
      background-color: mix($color-black, $background-color, 25%);
    }
    @include dark-keyboard-mode {
      background-color: mix($color-white, $background-color, 25%);
    }
  }

  &[disabled] {
    opacity: 0.6;
  }

  @include button-focus-outline;
}

@mixin button-small {
  @include rounded-corners;
  padding-block: 7px;
  padding-inline: 14px;
}

// Modals

@mixin modal-reset {
  @include popper-shadow();
  border-radius: 8px;
  margin-block: 0;
  margin-inline: auto;
  max-height: 100%;
  max-width: 360px;
  padding: 16px;
  position: relative;
  width: 95%;
  display: flex;
  flex-direction: column;

  @include light-theme() {
    background: $color-white;
    color: $color-gray-90;
  }

  @include dark-theme() {
    background: $color-gray-95;
    color: $color-gray-05;
  }
}

@mixin modal-close-button {
  @include button-reset;

  position: absolute;
  inset-inline-end: 12px;
  top: 12px;

  height: 24px;
  width: 24px;

  @include light-theme {
    @include color-svg('../images/icons/v3/x/x.svg', $color-gray-75);
  }

  @include dark-theme {
    @include color-svg('../images/icons/v3/x/x.svg', $color-gray-15);
  }

  &:focus {
    @include keyboard-mode {
      background-color: $color-ultramarine;
    }
    @include dark-keyboard-mode {
      background-color: $color-ultramarine-light;
    }
  }
}

@mixin color-bubble($bubble-size) {
  background-clip: content-box;
  border-color: transparent;
  border-radius: $bubble-size;
  border-style: solid;
  border-width: 4px;
  cursor: pointer;
  height: $bubble-size;
  padding: 2px;
  width: $bubble-size;

  @each $color, $value in $conversation-colors {
    &--#{$color} {
      background-color: $value;
    }
  }
  @each $color, $value in $conversation-colors-gradient {
    &--#{$color} {
      background-image: linear-gradient(
        map-get($value, 'deg'),
        map-get($value, 'start'),
        map-get($value, 'end')
      );
    }
  }
}

@mixin avatar-colors {
  @each $color, $value in $avatar-colors {
    &--#{$color} {
      --bg: #{map-get($value, 'bg')};
      --fg: #{map-get($value, 'fg')};

      background-color: var(--bg);
      color: var(--fg);

      &--icon {
        background-color: var(--fg);
        @include dark-theme {
          // For specificity
          background-color: var(--fg);
        }
      }
    }
  }
}

@mixin scrollbar {
  &::-webkit-scrollbar-thumb {
    border-radius: 4px;
    visibility: hidden;
    width: 6px;

    @include light-theme {
      background: $color-black-alpha-40;
    }
    @include dark-theme {
      background: $color-white-alpha-40;
    }
  }

  &::-webkit-scrollbar {
    background: transparent;
  }

  &::-webkit-scrollbar-track {
    background: transparent;
  }

  &:hover::-webkit-scrollbar-thumb {
    visibility: visible;
  }
}

@mixin normal-input {
  @include font-body-1;
  padding-block: 8px;
  padding-inline: 12px;
  border-radius: 6px;
  border-width: 2px;
  border-style: solid;
  width: 100%;

  @include light-theme {
    background: $color-white;
    color: $color-black;
    border-color: $color-gray-15;

    &:disabled {
      background: $color-gray-02;
      border-color: $color-gray-05;
      color: $color-gray-90;
    }
  }

  @include dark-theme {
    background: $color-gray-80;
    color: $color-gray-05;
    border-color: $color-gray-45;

    &:disabled {
      background: $color-gray-95;
      border-color: $color-gray-60;
      color: $color-gray-20;
    }
  }

  &:focus {
    outline: none;

    @include light-theme {
      border-color: $color-ultramarine;
    }
    @include dark-theme {
      border-color: $color-ultramarine-light;
    }
  }
}

@mixin install-screen {
  align-items: center;
  display: flex;
  width: 100vw;
  height: 100vh;
  justify-content: center;
  line-height: 30px;
  user-select: none;

  @include light-theme {
    background: $color-gray-02;
    color: $color-black;
  }

  @include dark-theme {
    background: $color-gray-95;
    color: $color-white;
  }

  h1 {
    @include font-title-2;
  }

  h2 {
    @include font-body-1;
    font-weight: normal;
  }
}

@mixin timeline-floating-header-node {
  @include rounded-corners;
  box-shadow: 0 1px 4px $color-black-alpha-20;

  @include light-theme {
    background: $color-white;
  }
  @include dark-theme {
    background: $color-gray-80;
  }
}

@mixin sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

@mixin disabled {
  &:is(:disabled, [aria-disabled='true']) {
    @content;
  }
}

@mixin not-disabled {
  &:not(:disabled):not([aria-disabled='true']) {
    @content;
  }
}

@mixin position-absolute-center {
  position: absolute;
  top: 50%;
  /* stylelint-disable-next-line liberty/use-logical-spec */
  left: 50%;
  /* stylelint-disable-next-line declaration-property-value-disallowed-list */
  transform: translate(-50%, -50%);
}

@mixin position-absolute-center-x {
  position: absolute;
  /* stylelint-disable-next-line liberty/use-logical-spec */
  left: 50%;
  /* stylelint-disable-next-line declaration-property-value-disallowed-list */
  transform: translateX(-50%);
}

@mixin position-absolute-center-y {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

@mixin NavTabs__Scroller {
  padding-bottom: 8px;
  @include scrollbar;
  &::-webkit-scrollbar-thumb {
    @include light-theme {
      background: $color-gray-25;
      border-color: $color-gray-04;
    }
    @include dark-theme {
      background: $color-gray-45;
      border-color: $color-gray-80;
    }
  }
}

@mixin draggable-region {
  -webkit-app-region: drag;
  body.context-menu-open & {
    -webkit-app-region: no-drag;
  }
}

@mixin tooltip {
  & {
    @include font-body-2;

    @include light-theme {
      background-color: $color-gray-04;
      color: $color-black;
      outline: 1px solid $color-gray-20;
    }

    @include dark-theme {
      background-color: $color-gray-80;
      color: $color-gray-15;
      outline: 1px solid $color-gray-62;
    }

    padding-block: 5px;
    padding-inline: 12px;
    border-radius: 6px;
    filter: drop-shadow(0px 4px 3px $color-black-alpha-16);
    pointer-events: none;
  }

  & .module-tooltip-arrow::before {
    position: absolute;
    content: '';
    border-style: solid;
    border-width: 7px;
  }

  &[data-placement='bottom'] .module-tooltip-arrow::before {
    @include light-theme {
      border-color: transparent transparent $color-gray-20 transparent;
    }

    @include dark-theme {
      border-color: transparent transparent $color-gray-62 transparent;
    }

    margin-top: -14px;
    /* stylelint-disable-next-line liberty/use-logical-spec */
    margin-left: -7px;
  }

  &[data-placement='bottom'] .module-tooltip-arrow::after {
    @include light-theme {
      border-bottom-color: $color-gray-04;
    }

    @include dark-theme {
      border-bottom-color: $color-gray-80;
    }
  }

  &[data-placement='top'] .module-tooltip-arrow::before {
    @include light-theme {
      border-color: $color-gray-20 transparent transparent transparent;
    }

    @include dark-theme {
      border-color: $color-gray-62 transparent transparent transparent;
    }

    margin-top: 0;
    /* stylelint-disable-next-line liberty/use-logical-spec */
    margin-left: -7px;
  }

  &[data-placement='top'] .module-tooltip-arrow::after {
    @include light-theme {
      border-top-color: $color-gray-04;
    }

    @include dark-theme {
      border-top-color: $color-gray-80;
    }
  }
}

@mixin button-active-call {
  $background: $color-accent-green;

  @include font-body-2-bold;
  @include rounded-corners;

  display: flex;
  width: auto;
  align-items: center;
  background-color: $background;
  color: $color-white;
  outline: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: none;

  &:before {
    $icon-size: 16px;

    @include color-svg(
      '../images/icons/v3/video/video-compact-fill.svg',
      $color-white
    );
    content: '';
    display: block;
    height: $icon-size;
    margin-inline-end: 4px;
    min-width: $icon-size;
    width: $icon-size;
  }

  &:not(:disabled) {
    &:hover {
      @include any-theme {
        background-color: darken($background, 16%);
      }
    }

    &:focus {
      @include keyboard-mode {
        background-color: darken($background, 16%);
      }
    }
  }
}