@import "function";
@import "../common/var";

/* Break-points
 -------------------------- */
@mixin res($key, $map: $--breakpoints) {
	// 循环断点Map，如果存在则返回
	@if map-has-key($map, $key) {
		$value: map-get($map, $key);
		@media #{$value} {
			@content;
		}
	} @else {
		@warn "Undefeined points: `#{$map}`";
	}
}

/* Scrollbar
 -------------------------- */
@mixin scroll-bar {
	$--scrollbar-thumb-background: #b4bccc;
	$--scrollbar-track-background: #fff;

	&::-webkit-scrollbar {
		z-index: 11;
		width: 6px;

		&:horizontal {
			height: 6px;
		}

		&-thumb {
			border-radius: 5px;
			width: 6px;
			background: $--scrollbar-thumb-background;
		}

		&-corner {
			background: $--scrollbar-track-background;
		}

		&-track {
			background: $--scrollbar-track-background;

			&-piece {
				background: $--scrollbar-track-background;
				width: 6px;
			}
		}
	}
}

/* Placeholder
 -------------------------- */
@mixin placeholder {
	&::-webkit-input-placeholder {
		@content
  }

	&::-moz-placeholder {
		@content
  }

	&:-ms-input-placeholder {
		@content
  }
}

/* BEM
 -------------------------- */
@mixin b($block) {
	$B: $namespace+'-'+$block !global;

	.#{$B} {
		@content;
	}
}

@mixin e($element) {
	$E: $element !global;
	$selector: &;
	$currentSelector: "";
	@each $unit in $element {
		$currentSelector: #{$currentSelector + "." + $B + $element-separator + $unit + ","};
	}

	@if hitAllSpecialNestRule($selector) {
		@at-root {
			#{$selector} {
				#{$currentSelector} {
					@content;
				}
			}
		}
	} @else {
		@at-root {
			#{$currentSelector} {
				@content;
			}
		}
	}
}

@mixin m($modifier) {
	$selector: &;
	$currentSelector: "";
	@each $unit in $modifier {
		$currentSelector: #{$currentSelector + & + $modifier-separator + $unit + ","};
	}

	@at-root {
		#{$currentSelector} {
			@content;
		}
	}
}

@mixin configurable-m($modifier, $E-flag: false) {
	$selector: &;
	$interpolation: '';

	@if $E-flag {
		$interpolation: $element-separator + $E-flag;
	}

	@at-root {
		#{$selector} {
			.#{$B+$interpolation+$modifier-separator+$modifier} {
				@content;
			}
		}
	}
}

@mixin spec-selector($specSelector: '', $element: $E, $modifier: false, $block: $B) {
	$modifierCombo: '';

	@if $modifier {
		$modifierCombo: $modifier-separator + $modifier;
	}

	@at-root {
		#{&}#{$specSelector}.#{$block+$element-separator+$element+$modifierCombo} {
			@content
    }
	}
}

@mixin meb($modifier: false, $element: $E, $block: $B) {
	$selector: &;
	$modifierCombo: '';

	@if $modifier {
		$modifierCombo: $modifier-separator + $modifier;
	}

	@at-root {
		#{$selector} {
			.#{$block+$element-separator+$element+$modifierCombo} {
				@content
      }
		}
	}
}

@mixin when($state) {
	@at-root {
		&.#{$state-prefix + $state} {
			@content;
		}
	}
}

@mixin extend-rule($name) {
	@extend #{'%shared-'+$name};
}

@mixin share-rule($name) {
	$rule-name: '%shared-'+$name;

	@at-root #{$rule-name} {
		@content
  }
}

@mixin pseudo($pseudo) {
	@at-root #{&}#{':#{$pseudo}'} {
		@content
  }
}