@use '../core/tokens/m2/mdc/icon-button' as tokens-mdc-icon-button;
@use '../core/tokens/m2/mat/icon-button' as tokens-mat-icon-button;

@use './button-base';
@use '../core/style/private';
@use '../core/style/vendor-prefixes';
@use '../core/tokens/token-utils';


.mat-mdc-icon-button {
  @include vendor-prefixes.user-select(none);
  display: inline-block;
  position: relative;
  box-sizing: border-box;
  border: none;
  outline: none;
  background-color: transparent;
  fill: currentColor;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  z-index: 0;
  overflow: visible;

  // Border radius is inherited by ripple to know its shape. Set to 50% so the ripple is round.
  border-radius: 50%;

  // Prevent the button from shrinking since it's always supposed to be a circle.
  flex-shrink: 0;

  // Ensure the icons are centered.
  text-align: center;

  @include token-utils.use-tokens(
    tokens-mdc-icon-button.$prefix, tokens-mdc-icon-button.get-token-slots()) {
    $button-size: token-utils.get-token-variable(state-layer-size, $fallback: 48px);
    $icon-size: token-utils.get-token-variable(icon-size, $fallback: 24px);

    // We emit these tokens ourselves here so we can provide a default value.
    // This avoids a lot internal breakages in apps that didn't include the icon button theme.
    width: $button-size;
    height: $button-size;

    // Note: this is wrapped in an interpolation, because of an internal lint rule that bans
    // interpolations in `calc`, even though this is the only way to achieve what we're looking for.
    padding: #{calc(#{calc(#{$button-size} - #{$icon-size})} / 2)};

    // Icon size used to be placed on the host element. Now, in `theme-styles` it is placed on
    // the unused `.mdc-button__icon` class. Explicitly set the font-size here.
    @include token-utils.create-token-slot(font-size, icon-size);
    @include token-utils.create-token-slot(color, icon-color);
  }

  @include button-base.mat-private-button-interactive();
  @include button-base.mat-private-button-ripple(tokens-mat-icon-button.$prefix,
    tokens-mat-icon-button.get-token-slots());
  @include button-base.mat-private-button-touch-target(true, tokens-mat-icon-button.$prefix,
    tokens-mat-icon-button.get-token-slots());
  @include private.private-animation-noop();

  @include token-utils.use-tokens(
    tokens-mdc-icon-button.$prefix, tokens-mdc-icon-button.get-token-slots()) {
    @include button-base.mat-private-button-disabled {
      @include token-utils.create-token-slot(color, disabled-icon-color);
    };

    img,
    svg {
      @include token-utils.create-token-slot(width, icon-size);
      @include token-utils.create-token-slot(height, icon-size);
      vertical-align: baseline;
    }
  }

  .mat-mdc-button-persistent-ripple {
    border-radius: 50%;
  }

  // MDC used to include this and it seems like a lot of apps depend on it.
  &[hidden] {
    display: none;
  }

  // MDC adds some styles to icon buttons that conflict with some of our focus indicator styles
  // and don't actually do anything. This undoes those conflicting styles.
  &.mat-unthemed,
  &.mat-primary,
  &.mat-accent,
  &.mat-warn {
    &:not(.mdc-ripple-upgraded):focus::before {
      background: transparent;
      opacity: 1;
    }
  }
}
