bulma/sass/elements/button.scss

@use "sass:list";

@use "../utilities/css-variables" as cv;
@use "../utilities/derived-variables" as dv;
@use "../utilities/initial-variables" as iv;
@use "../utilities/extends";
@use "../utilities/mixins" as mx;

$button-h: #{cv.getVar("scheme-h")};
$button-s: #{cv.getVar("scheme-s")};
$button-l: #{cv.getVar("scheme-main-l")};
$button-background-l: #{cv.getVar("scheme-main-l")};
$button-background-l-delta: 0%;
$button-hover-background-l-delta: #{cv.getVar("hover-background-l-delta")};
$button-active-background-l-delta: #{cv.getVar("active-background-l-delta")};
$button-color-l: #{cv.getVar("text-strong-l")};
$button-border-l: #{cv.getVar("border-l")};
$button-border-l-delta: 0%;
$button-hover-border-l-delta: #{cv.getVar("hover-border-l-delta")};
$button-active-border-l-delta: #{cv.getVar("active-border-l-delta")};
$button-focus-border-l-delta: #{cv.getVar("focus-border-l-delta")};
$button-outer-shadow-h: 0;
$button-outer-shadow-s: 0%;
$button-outer-shadow-l: 20%;
$button-outer-shadow-a: 0.05;

$button-weight: cv.getVar("weight-medium") !default;
$button-family: false !default;

$button-border-color: cv.getVar("border") !default;
$button-border-style: solid !default;
$button-border-width: cv.getVar("control-border-width") !default;

$button-padding-vertical: 0.5em !default;
$button-padding-horizontal: 1em !default;

$button-focus-border-color: cv.getVar("link-focus-border") !default;
$button-focus-box-shadow-size: 0 0 0 0.125em !default;
$button-focus-box-shadow-color: hsla(
  #{cv.getVar("link-h")},
  #{cv.getVar("link-s")},
  #{cv.getVar("link-on-scheme-l")},
  0.25
) !default;

$button-active-color: cv.getVar("link-active") !default;
$button-active-border-color: cv.getVar("link-active-border") !default;

$button-text-color: cv.getVar("text") !default;
$button-text-decoration: underline !default;
$button-text-hover-background-color: cv.getVar("background") !default;
$button-text-hover-color: cv.getVar("text-strong") !default;

$button-ghost-background: none !default;
$button-ghost-border-color: transparent !default;
$button-ghost-color: cv.getVar("link-text") !default;
$button-ghost-decoration: none !default;
$button-ghost-hover-color: cv.getVar("link") !default;
$button-ghost-hover-decoration: underline !default;

$button-disabled-background-color: cv.getVar("scheme-main") !default;
$button-disabled-border-color: cv.getVar("border") !default;
$button-disabled-shadow: none !default;
$button-disabled-opacity: 0.5 !default;

$button-static-color: cv.getVar("text-weak") !default;
$button-static-background-color: cv.getVar("scheme-main-ter") !default;
$button-static-border-color: cv.getVar("border") !default;

$button-colors: dv.$colors !default;
$button-responsive-sizes: (
  "mobile": (
    "small": calc(#{cv.getVar("size-small")} * 0.75),
    "normal": calc(#{cv.getVar("size-small")} * 0.875),
    "medium": cv.getVar("size-small"),
    "large": cv.getVar("size-normal"),
  ),
  "tablet-only": (
    "small": calc(#{cv.getVar("size-small")} * 0.875),
    "normal": cv.getVar("size-small"),
    "medium": cv.getVar("size-normal"),
    "large": cv.getVar("size-medium"),
  ),
) !default;

$no-palette: ("white", "black", "light", "dark");

.#{iv.$class-prefix}button {
  @include cv.register-vars(
    (
      "button-family": #{$button-family},
      "button-weight": #{$button-weight},
      "button-border-color": #{$button-border-color},
      "button-border-style": #{$button-border-style},
      "button-border-width": #{$button-border-width},
      "button-padding-vertical": #{$button-padding-vertical},
      "button-padding-horizontal": #{$button-padding-horizontal},
      "button-focus-border-color": #{$button-focus-border-color},
      "button-focus-box-shadow-size": #{$button-focus-box-shadow-size},
      "button-focus-box-shadow-color": #{$button-focus-box-shadow-color},
      "button-active-color": #{$button-active-color},
      "button-active-border-color": #{$button-active-border-color},
      "button-text-color": #{$button-text-color},
      "button-text-decoration": #{$button-text-decoration},
      "button-text-hover-background-color": #{$button-text-hover-background-color},
      "button-text-hover-color": #{$button-text-hover-color},
      "button-ghost-background": #{$button-ghost-background},
      "button-ghost-border-color": #{$button-ghost-border-color},
      "button-ghost-color": #{$button-ghost-color},
      "button-ghost-decoration": #{$button-ghost-decoration},
      "button-ghost-hover-color": #{$button-ghost-hover-color},
      "button-ghost-hover-decoration": #{$button-ghost-hover-decoration},
      "button-disabled-background-color": #{$button-disabled-background-color},
      "button-disabled-border-color": #{$button-disabled-border-color},
      "button-disabled-shadow": #{$button-disabled-shadow},
      "button-disabled-opacity": #{$button-disabled-opacity},
      "button-static-color": #{$button-static-color},
      "button-static-background-color": #{$button-static-background-color},
      "button-static-border-color": #{$button-static-border-color},
    )
  );
}

.#{iv.$class-prefix}button {
  @include cv.register-vars(
    (
      "button-h": #{$button-h},
      "button-s": #{$button-s},
      "button-l": #{$button-l},
      "button-background-l": #{$button-background-l},
      "button-background-l-delta": #{$button-background-l-delta},
      "button-hover-background-l-delta": #{$button-hover-background-l-delta},
      "button-active-background-l-delta": #{$button-active-background-l-delta},
      "button-color-l": #{$button-color-l},
      "button-border-l": #{$button-border-l},
      "button-border-l-delta": #{$button-border-l-delta},
      "button-hover-border-l-delta": #{$button-hover-border-l-delta},
      "button-active-border-l-delta": #{$button-active-border-l-delta},
      "button-focus-border-l-delta": #{$button-focus-border-l-delta},
      "button-outer-shadow-h": #{$button-outer-shadow-h},
      "button-outer-shadow-s": #{$button-outer-shadow-s},
      "button-outer-shadow-l": #{$button-outer-shadow-l},
      "button-outer-shadow-a": #{$button-outer-shadow-a},
      "loading-color":
        hsl(
          #{cv.getVar("button-h")},
          #{cv.getVar("button-s")},
          #{cv.getVar("button-color-l")}
        ),
    )
  );

  @extend %control;
  @extend %unselectable;

  background-color: hsl(
    #{cv.getVar("button-h")},
    #{cv.getVar("button-s")},
    calc(
      #{cv.getVar("button-background-l")} + #{cv.getVar(
          "button-background-l-delta"
        )}
    )
  );
  border-color: hsl(
    #{cv.getVar("button-h")},
    #{cv.getVar("button-s")},
    calc(
      #{cv.getVar("button-border-l")} + #{cv.getVar("button-border-l-delta")}
    )
  );
  border-style: cv.getVar("button-border-style");
  border-width: cv.getVar("button-border-width");
  box-shadow:
    0px 0.0625em 0.125em
      hsla(
        cv.getVar("button-outer-shadow-h"),
        cv.getVar("button-outer-shadow-s"),
        cv.getVar("button-outer-shadow-l"),
        cv.getVar("button-outer-shadow-a")
      ),
    0px 0.125em 0.25em
      hsla(
        cv.getVar("button-outer-shadow-h"),
        cv.getVar("button-outer-shadow-s"),
        cv.getVar("button-outer-shadow-l"),
        cv.getVar("button-outer-shadow-a")
      );
  color: hsl(
    #{cv.getVar("button-h")},
    #{cv.getVar("button-s")},
    #{cv.getVar("button-color-l")}
  );
  cursor: pointer;
  font-weight: cv.getVar("button-weight");
  height: auto;
  justify-content: center;
  padding-bottom: calc(
    #{cv.getVar("button-padding-vertical")} - #{cv.getVar(
        "button-border-width"
      )}
  );
  padding-left: calc(
    #{cv.getVar("button-padding-horizontal")} - #{cv.getVar(
        "button-border-width"
      )}
  );
  padding-right: calc(
    #{cv.getVar("button-padding-horizontal")} - #{cv.getVar(
        "button-border-width"
      )}
  );
  padding-top: calc(
    #{cv.getVar("button-padding-vertical")} - #{cv.getVar(
        "button-border-width"
      )}
  );
  text-align: center;
  white-space: nowrap;

  @if $button-family {
    font-family: cv.getVar("button-family");
  }

  strong {
    color: inherit;
  }

  .#{iv.$class-prefix}icon {
    &,
    &.#{iv.$class-prefix}is-small,
    &.#{iv.$class-prefix}is-medium,
    &.#{iv.$class-prefix}is-large {
      height: 1.5em;
      width: 1.5em;
    }

    &:first-child:not(:last-child) {
      margin-inline-start: calc(
        -0.5 * #{cv.getVar("button-padding-horizontal")}
      );
      margin-inline-end: calc(#{cv.getVar("button-padding-horizontal")} * 0.25);
    }

    &:last-child:not(:first-child) {
      margin-inline-start: calc(
        #{cv.getVar("button-padding-horizontal")} * 0.25
      );
      margin-inline-end: calc(-0.5 * #{cv.getVar("button-padding-horizontal")});
    }

    &:first-child:last-child {
      margin-inline-start: calc(
        -0.5 * #{cv.getVar("button-padding-horizontal")}
      );
      margin-inline-end: calc(-0.5 * #{cv.getVar("button-padding-horizontal")});
    }
  }

  // States
  &:hover,
  &.#{iv.$class-prefix}is-hovered {
    @include cv.register-vars(
      (
        "button-background-l-delta": #{cv.getVar(
            "button-hover-background-l-delta"
          )},
        "button-border-l-delta": #{cv.getVar("button-hover-border-l-delta")},
      )
    );
  }

  &:focus-visible,
  &.#{iv.$class-prefix}is-focused {
    @include cv.register-var("button-border-width", 1px);

    border-color: hsl(
      #{cv.getVar("focus-h")},
      #{cv.getVar("focus-s")},
      #{cv.getVar("focus-l")}
    );
    box-shadow: cv.getVar("focus-shadow-size")
      hsla(
        cv.getVar("focus-h"),
        cv.getVar("focus-s"),
        cv.getVar("focus-l"),
        cv.getVar("focus-shadow-alpha")
      );
  }

  &:active,
  &.#{iv.$class-prefix}is-active {
    @include cv.register-vars(
      (
        "button-background-l-delta": #{cv.getVar(
            "button-active-background-l-delta"
          )},
        "button-border-l-delta": #{cv.getVar("button-active-border-l-delta")},
        "button-outer-shadow-a": 0,
      )
    );
  }

  &[disabled],
  fieldset[disabled] & {
    background-color: cv.getVar("button-disabled-background-color");
    border-color: cv.getVar("button-disabled-border-color");
    box-shadow: cv.getVar("button-disabled-shadow");
    opacity: cv.getVar("button-disabled-opacity");
  }

  // Colors
  @each $name, $pair in $button-colors {
    &.#{iv.$class-prefix}is-#{$name} {
      @include cv.register-vars(
        (
          "button-h": #{cv.getVar($name, "", "-h")},
          "button-s": #{cv.getVar($name, "", "-s")},
          "button-l": #{cv.getVar($name, "", "-l")},
          "button-background-l": #{cv.getVar($name, "", "-l")},
          "button-border-l": #{cv.getVar($name, "", "-l")},
          "button-border-width": 0px,
          "button-color-l": #{cv.getVar($name, "", "-invert-l")},
          "button-outer-shadow-a": 0,
        )
      );

      &:focus-visible,
      &.#{iv.$class-prefix}is-focused {
        @include cv.register-var("button-border-width", 1px);
      }

      @if not list.index($no-palette, $name) {
        &.#{iv.$class-prefix}is-light {
          @include cv.register-vars(
            (
              "button-background-l": #{cv.getVar("light-l")},
              "button-color-l": #{cv.getVar($name, "", "-light-invert-l")},
            )
          );
        }

        &.#{iv.$class-prefix}is-dark {
          @include cv.register-vars(
            (
              "button-background-l": #{cv.getVar("dark-l")},
              "button-color-l": #{cv.getVar($name, "", "-dark-invert-l")},
            )
          );
        }
      }

      &.#{iv.$class-prefix}is-soft {
        @include cv.register-vars(
          (
            "button-background-l": #{cv.getVar("soft-l")},
            "button-color-l": #{cv.getVar("soft-invert-l")},
          )
        );
      }

      &.#{iv.$class-prefix}is-bold {
        @include cv.register-vars(
          (
            "button-background-l": #{cv.getVar("bold-l")},
            "button-color-l": #{cv.getVar("bold-invert-l")},
          )
        );
      }

      &[disabled],
      fieldset[disabled] & {
        background-color: cv.getVar($name);
        border-color: cv.getVar($name);
        box-shadow: none;
      }
    }
  }

  // Styles
  &.#{iv.$class-prefix}is-outlined {
    @include cv.register-vars(
      (
        "button-border-width": max(1px, 0.0625em),
      )
    );

    background-color: transparent;
    border-color: hsl(
      #{cv.getVar("button-h")},
      #{cv.getVar("button-s")},
      #{cv.getVar("button-l")}
    );
    color: hsl(
      #{cv.getVar("button-h")},
      #{cv.getVar("button-s")},
      #{cv.getVar("button-l")}
    );

    &:hover {
      @include cv.register-vars(
        (
          "button-border-width": max(2px, 0.125em),
          "button-outer-shadow-alpha": 1,
        )
      );
    }

    &:active {
      @include cv.register-vars(());
    }
  }

  &.#{iv.$class-prefix}is-inverted {
    background-color: hsl(
      #{cv.getVar("button-h")},
      #{cv.getVar("button-s")},
      calc(
        #{cv.getVar("button-color-l")} + #{cv.getVar(
            "button-background-l-delta"
          )}
      )
    );
    color: hsl(
      #{cv.getVar("button-h")},
      #{cv.getVar("button-s")},
      #{cv.getVar("button-background-l")}
    );
  }

  &.#{iv.$class-prefix}is-text {
    background-color: transparent;
    border-color: transparent;
    color: cv.getVar("button-text-color");
    text-decoration: cv.getVar("button-text-decoration");

    &:hover,
    &.#{iv.$class-prefix}is-hovered {
      background-color: cv.getVar("button-text-hover-background-color");
      color: cv.getVar("button-text-hover-color");
    }

    &:active,
    &.#{iv.$class-prefix}is-active {
      // background-color: bulmaDarken($button-text-hover-background-color, 5%);
      color: cv.getVar("button-text-hover-color");
    }

    &[disabled],
    fieldset[disabled] & {
      background-color: transparent;
      border-color: transparent;
      box-shadow: none;
    }
  }

  &.#{iv.$class-prefix}is-ghost {
    background: cv.getVar("button-ghost-background");
    border-color: cv.getVar("button-ghost-border-color");
    box-shadow: none;
    color: cv.getVar("button-ghost-color");
    text-decoration: cv.getVar("button-ghost-decoration");

    &:hover,
    &.#{iv.$class-prefix}is-hovered {
      color: cv.getVar("button-ghost-hover-color");
      text-decoration: cv.getVar("button-ghost-hover-decoration");
    }
  }

  // Sizes
  &.#{iv.$class-prefix}is-small {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-small")},
        "control-radius": #{cv.getVar("radius-small")},
      )
    );
  }

  &.#{iv.$class-prefix}is-normal {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-normal")},
        "control-radius": #{cv.getVar("radius")},
      )
    );
  }

  &.#{iv.$class-prefix}is-medium {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-medium")},
        "control-radius": #{cv.getVar("radius-medium")},
      )
    );
  }

  &.#{iv.$class-prefix}is-large {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-large")},
        "control-radius": #{cv.getVar("radius-medium")},
      )
    );
  }

  // Modifiers
  &.#{iv.$class-prefix}is-fullwidth {
    display: flex;
    width: 100%;
  }

  &.#{iv.$class-prefix}is-loading {
    box-shadow: none;
    color: transparent !important;
    pointer-events: none;

    &::after {
      @extend %loader;
      @include mx.center(1em);
      position: absolute !important;
    }
  }

  &.#{iv.$class-prefix}is-static {
    background-color: cv.getVar("button-static-background-color");
    border-color: cv.getVar("button-static-border-color");
    color: cv.getVar("button-static-color");
    box-shadow: none;
    pointer-events: none;
  }

  &.#{iv.$class-prefix}is-rounded {
    border-radius: cv.getVar("radius-rounded");
    padding-left: calc(#{cv.getVar("button-padding-horizontal")} + 0.25em);
    padding-right: calc(#{cv.getVar("button-padding-horizontal")} + 0.25em);
  }
}

.#{iv.$class-prefix}buttons {
  @extend %block;
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-start;

  // Sizes
  &.#{iv.$class-prefix}are-small {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-small")},
        "control-radius": #{cv.getVar("radius-small")},
      )
    );
  }

  &.#{iv.$class-prefix}are-medium {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-medium")},
        "control-radius": #{cv.getVar("radius-medium")},
      )
    );
  }

  &.#{iv.$class-prefix}are-large {
    @include cv.register-vars(
      (
        "control-size": #{cv.getVar("size-large")},
        "control-radius": #{cv.getVar("radius-large")},
      )
    );
  }

  &.#{iv.$class-prefix}has-addons {
    gap: 0;

    .#{iv.$class-prefix}button {
      &:not(:first-child) {
        border-end-start-radius: 0;
        border-start-start-radius: 0;
      }

      &:not(:last-child) {
        border-end-end-radius: 0;
        border-start-end-radius: 0;
        margin-inline-end: -1px;
      }

      &:hover,
      &.#{iv.$class-prefix}is-hovered {
        z-index: 2;
      }

      &:focus,
      &.#{iv.$class-prefix}is-focused,
      &:active,
      &.#{iv.$class-prefix}is-active,
      &.#{iv.$class-prefix}is-selected {
        z-index: 3;

        &:hover {
          z-index: 4;
        }
      }

      &.#{iv.$class-prefix}is-expanded {
        flex-grow: 1;
        flex-shrink: 1;
      }
    }
  }

  &.#{iv.$class-prefix}is-centered {
    justify-content: center;
  }

  &.#{iv.$class-prefix}is-right {
    justify-content: flex-end;
  }
}

@each $bp-name, $bp-sizes in $button-responsive-sizes {
  @include mx.breakpoint($bp-name) {
    @each $size, $value in $bp-sizes {
      @if $size != "normal" {
        .#{iv.$class-prefix}button.#{iv.$class-prefix}is-responsive.#{iv.$class-prefix}is-#{$size} {
          font-size: $value;
        }
      } @else {
        .#{iv.$class-prefix}button.#{iv.$class-prefix}is-responsive,
        .#{iv.$class-prefix}button.#{iv.$class-prefix}is-responsive.#{iv.$class-prefix}is-normal {
          font-size: $value;
        }
      }
    }
  }
}