semi-design/packages/semi-foundation/grid/mixin.scss

// mixins for clearfix
// ------------------------

//TODO 提出到公共mixin
@mixin clearfix() {
    zoom: 1;

    &::before,
    &::after {
        display: table;
        content: '';
    }

    &::after {
        clear: both;
    }
}

// mixins for grid system
// ------------------------
@mixin make-row($gutter: $width-grid_gutter) {
    position: relative;
    height: auto;
    margin-right: ($gutter / -2);
    margin-left: ($gutter / -2);
    @include clearfix();
}

@mixin make-grid-columns() {
    $index: 1;

    @for $i from $index through $width-grid_columns {
        $item: '.#{$module}-col-#{$i}, .#{$module}-col-xs-#{$i}, .#{$module}-col-sm-#{$i}, .#{$module}-col-md-#{$i}, .#{$module}-col-lg-#{$i}';

        #{$item} {
            position: relative;
            min-height: 1px;
            padding-right: ($width-grid_gutter / 2);
            padding-left: ($width-grid_gutter / 2);
        }
    }
}

@mixin float-grid-columns($class) {
    $index: 1;

    @for $i from $index through $width-grid_columns {
        $item: '.#{$module}-col#{$class}-#{$i}';

        #{$item} {
            flex: 0 0 auto;
            float: left;
        }
    }
}

@mixin loop-grid-columns($index, $class) {
    @for $i from 1 through ($index) {
        .#{$module}-col#{$class}-#{$i} {
            display: block;
            box-sizing: border-box;
            width: percentage(($i / $width-grid_columns));
        }

        .#{$module}-col#{$class}-push-#{$i} {
            left: percentage(($i / $width-grid_columns));
        }

        .#{$module}-col#{$class}-pull-#{$i} {
            right: percentage(($i / $width-grid_columns));
        }

        .#{$module}-col#{$class}-offset-#{$i} {
            margin-left: percentage(($i / $width-grid_columns));
        }

        .#{$module}-col#{$class}-order-#{$i} {
            order: $i;
        }
    }
}

// grid rtl mixin
@mixin float-grid-columns-rtl($class) {
    $index: 1;

    @for $i from $index through $width-grid_columns {
        $item: '.#{$module}-col#{$class}-#{$i}';

        #{$item} {
            .#{$prefix}-rtl & {
                // float 应该改为镜像的
                float: right;
            }
        }
    }
}

@mixin loop-grid-columns-rtl($index, $class) {
    @for $i from 1 through ($index) {
        .#{$module}-col#{$class}-offset-#{$i} {
            .#{$prefix}-rtl & {
                margin-left: auto;
                margin-right: percentage(($i / $width-grid_columns));
            }
        }
    }
}

@mixin make-grid($class: '') {
    @include float-grid-columns($class);
    @include loop-grid-columns($width-grid_columns, $class);
    @include float-grid-columns-rtl($class);
    @include loop-grid-columns-rtl($width-grid_columns, $class);
}