/// Генератор сеток 💡
/// Переопределение миксина Bootstrap 4
//// - Добавлена CSS-функция calc()
//// - Опциональная генерация некоторых классов
/// @group Grid
///
/// @param {Number} $columns [$grid-columns] - Количество колонок
/// @param {Number} $gutter [$grid-gutter-width] - Ширина отступа между колонками 
/// @param {Map} $breakpoints [$grid-breakpoints] - Список брейкпоинтов
/// @param {Bool} $enable-order-first-last [false] - Генерировать классы .order-*-first, .order-*-last
/// @param {Bool} $enable-row-cols [false] - Генерировать классы .row-cols-*
///

@mixin make-grid-columns(
    $columns: $grid-columns,
    $gutter: $grid-gutter-width,
    $breakpoints: $grid-breakpoints,
    $enable-order-first-last: $grid-enable-order-first-last,
    $enable-row-cols: $grid-enable-row-cols
    ) {
    // Common properties for all breakpoints
    %grid-column {
      position: relative;
      width: 100%;
      padding-right: calc(#{$gutter} / 2);
      padding-left: calc(#{$gutter} / 2);
    }
  
    @each $breakpoint in map-keys($breakpoints) {
      $infix: breakpoint-infix($breakpoint, $breakpoints);
  
      // Allow columns to stretch full width below their breakpoints
      @for $i from 1 through $columns {
        .col#{$infix}-#{$i} {
          @extend %grid-column;
        }
      }
      .col#{$infix},
      .col#{$infix}-auto {
        @extend %grid-column;
      }
  
      @include media-breakpoint-up($breakpoint, $breakpoints) {
        // Provide basic `.col-{bp}` classes for equal-width flexbox columns
        .col#{$infix} {
          flex-basis: 0;
          flex-grow: 1;
          max-width: 100%;
        }
  
        @if ($enable-row-cols) {
            @for $i from 1 through $grid-row-columns {
                .row-cols#{$infix}-#{$i} {
                    @include row-cols($i);
                }
            }
        }
  
        .col#{$infix}-auto {
          @include make-col-auto();
        }
  
        @for $i from 1 through $columns {
          .col#{$infix}-#{$i} {
            @include make-col($i, $columns);
          }
        }
  
        @if ($enable-order-first-last) {
            .order#{$infix}-first { order: -1; }
            .order#{$infix}-last { order: $columns + 1; }
        }
  
        @for $i from 0 through $columns {
          .order#{$infix}-#{$i} { order: $i; }
        }
  
        // `$columns - 1` because offsetting by the width of an entire row isn't possible
        @for $i from 0 through ($columns - 1) {
          @if not ($infix == "" and $i == 0) { // Avoid emitting useless .offset-0
            .offset#{$infix}-#{$i} {
              @include make-col-offset($i, $columns);
            }
          }
        }
      }
    }
  }