// Drawing mixins

// generic drawing of more complex things

//
// Helper mixin for drawing visible focus rings
//
// If $target is specified, the focus ring is applied to the specified child element.
// If $outer is true, the focus ring extends outward. Otherwise, it extends inward.
// If $within is true, use focus-within instead of focus:focus-visible
//

//to allow some common mixins to know whether they've been called for a gtk3 or gtk4 widget, because there are some things that are different.
$gtk: 4;


@mixin focus-ring($target: null, $width: 2px, $offset: -$width, $outer: false, $focus-state: 'focus:focus-visible', $fc: $focus_border_color) {
  transition-property: outline, outline-width, outline-offset, outline-color;
  transition-duration: 300ms;
  animation-timing-function: ease-in-out;
  & #{$target} {
    outline: 0 solid transparent;
    outline-offset: if($outer, $offset + 4px, $offset + $width + 4px);
  }

  &:#{$focus-state} #{$target} {
    outline-color: $fc;
    outline-width: $width;
    outline-offset: $offset;
  }
}

@mixin _shadows($list...) {
//
// Helper mixin to stack up to box-shadows;
//
  $shadows: null;

  @each $shadow in $list {
    @if $shadow!=none { $shadows: $shadows, $shadow; }
  }

  box-shadow: $shadows;
}

// entries

@mixin entry($t, $fc:$focus_border_color) {
//
// Entries drawing function
//
// $t: entry type
// $fc: focus color
//
// possible $t values:
// normal, focus, insensitive, backdrop, backdrop-insensitive, osd, osd-focus, osd-backdrop, block_cursor;
//
  $_entry_shadow: 0 1px 2px transparentize($shadow_hard_color, 0.6);
  $_hilight_color: _button_hilight_color($bg_color);
  
  @if $t==normal {
    color: $text_color;
    border-color: $borders_color;
    background-color: $base_color;
    @include _shadows(inset $_entry_shadow, 0 1px $_hilight_color);
    // for the transition to work the number of shadows in different states needs to match, hence the transparent shadow here.
  }
  
  
  @if $t==insensitive {
    color: $insensitive_fg_color;
    border-color: $insensitive_fg_color;
    background-color: $insensitive_bg_color;
  }
  @if $t==backdrop {
    color: $backdrop_text_color;
    border-color: $backdrop_borders_color;
    background-color: $backdrop_base_color;
  }
  @if $t==backdrop-insensitive {
    color: $backdrop_insensitive_color;
    border-color: $backdrop_borders_color;
    background-color: $insensitive_bg_color;
  }
  @if $t==osd {
    color: $osd_text_color;
    border-color: $osd_borders_color;
    background-color: transparentize(opacify($osd_borders_color, 1), 0.5);
    background-clip: padding-box;
    @include _shadows(inset $_entry_shadow, 0 1px $_hilight_color);
    -gtk-icon-shadow: 0 1px black;
  }
  @if $t==osd-focus {
    color: $osd_text_color;
    border-color: $selected_bg_color;
    background-color: transparentize(opacify($osd_borders_color, 1), 0.5);
    background-clip: padding-box;
    @include _shadows(inset $_entry_shadow, 0 1px $_hilight_color);
  }
  @if $t==osd-insensitive {
    color: $osd_insensitive_fg_color;
    border-color: $osd_borders_color;
    background-color: $osd_insensitive_bg_color;
    background-clip: padding-box;
  }
  @if $t==osd-backdrop {
    color: $osd_text_color;
    border-color: $osd_borders_color;
    background-color: transparentize(opacify($osd_borders_color, 1), 0.5);
    background-clip: padding-box;
  }
  @if $t==block_cursor {
    color: $base_color;
    background-color: $text_color;
  }
}

// buttons


@import "../common/buttons.scss";



@mixin headerbar_fill($c:$headerbar_bg_color, $ov: none) {
//
// headerbar fill
//
// $c:  base color
// $ov: a background layer for background shorthand (hence no commas!)
//
  $gradient: linear-gradient(to top, darken($c, 2%), lighten($c, 1%));

  @if $variant == 'dark' { $gradient: linear-gradient(to top, lighten($c, 4%), lighten($c, 6%)); }

  @if $ov != none { background: $c $ov, $gradient; }
  @else { background: $c $gradient; }

}

@mixin overshoot($p, $t:normal, $c:$fg_color) {
//
// overshoot
//
// $p: position
// $t: type
// $c: base color
//
// possible $p values:
// top, bottom, right, left
//
// possible $t values:
// normal, backdrop
//

  $_small_gradient_length: 3%;
  $_big_gradient_length: 50%;

  $_small_gradient_size: 100% $_small_gradient_length;
  $_big_gradient_size: 100% $_big_gradient_length;

  @if $p==right or $p==left {
    $_small_gradient_size: $_small_gradient_length 100%;
    $_big_gradient_size: $_big_gradient_length 100%;
  }

  $_small_gradient_color: $c;
  $_big_gradient_color: transparentize($c, 0.93);

  @if $c==$fg_color {
    $_small_gradient_color: darken($borders_color, 10%);
    $_big_gradient_color: transparentize($fg_color, 0.93);

    @if $t==backdrop { $_small_gradient_color: $backdrop_borders_color; }
  }

  $_small_gradient: radial-gradient(farthest-side at $p,
                                    $_small_gradient_color 85%,
                                    transparentize($_small_gradient_color, 1));

  $_big_gradient: radial-gradient(farthest-side at $p,
                                  $_big_gradient_color,
                                  transparentize($_big_gradient_color, 1));

  @if $t==normal {
    background-image: $_small_gradient, $_big_gradient;
    background-size: $_small_gradient_size, $_big_gradient_size;
  }

  @else if $t==backdrop {
    background-image: $_small_gradient;
    background-size: $_small_gradient_size;
  }

  background-repeat: no-repeat;
  background-position: $p;

  background-color: transparent; // reset some properties to be sure to not inherit them somehow
  border: none;                  //
  box-shadow: none;              //
}

/***************************
 * Check and Radio buttons *
 ***************************/

@import "../common/checkradios.scss";