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sass/bootstrap/mixins/_grid-framework.scss 2.3 KB
4569bbd1   liuqimichale   init website
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  // Framework grid generation
  //
  // Used only by Bootstrap to generate the correct number of grid classes given
  // any value of `$grid-columns`.
  
  // [converter] This is defined recursively in LESS, but Sass supports real loops
  @mixin make-grid-columns($i: 1, $list: ".col-xs-#{$i}, .col-sm-#{$i}, .col-md-#{$i}, .col-lg-#{$i}") {
    @for $i from (1 + 1) through $grid-columns {
      $list: "#{$list}, .col-xs-#{$i}, .col-sm-#{$i}, .col-md-#{$i}, .col-lg-#{$i}";
    }
    #{$list} {
      position: relative;
      // Prevent columns from collapsing when empty
      min-height: 1px;
      // Inner gutter via padding
      padding-left:  ceil(($grid-gutter-width / 2));
      padding-right: floor(($grid-gutter-width / 2));
    }
  }
  
  
  // [converter] This is defined recursively in LESS, but Sass supports real loops
  @mixin float-grid-columns($class, $i: 1, $list: ".col-#{$class}-#{$i}") {
    @for $i from (1 + 1) through $grid-columns {
      $list: "#{$list}, .col-#{$class}-#{$i}";
    }
    #{$list} {
      float: left;
    }
  }
  
  
  @mixin calc-grid-column($index, $class, $type) {
    @if ($type == width) and ($index > 0) {
      .col-#{$class}-#{$index} {
        width: percentage(($index / $grid-columns));
      }
    }
    @if ($type == push) and ($index > 0) {
      .col-#{$class}-push-#{$index} {
        left: percentage(($index / $grid-columns));
      }
    }
    @if ($type == push) and ($index == 0) {
      .col-#{$class}-push-0 {
        left: auto;
      }
    }
    @if ($type == pull) and ($index > 0) {
      .col-#{$class}-pull-#{$index} {
        right: percentage(($index / $grid-columns));
      }
    }
    @if ($type == pull) and ($index == 0) {
      .col-#{$class}-pull-0 {
        right: auto;
      }
    }
    @if ($type == offset) {
      .col-#{$class}-offset-#{$index} {
        margin-left: percentage(($index / $grid-columns));
      }
    }
  }
  
  // [converter] This is defined recursively in LESS, but Sass supports real loops
  @mixin loop-grid-columns($columns, $class, $type) {
    @for $i from 0 through $columns {
      @include calc-grid-column($i, $class, $type);
    }
  }
  
  
  // Create grid for specific class
  @mixin make-grid($class) {
    @include float-grid-columns($class);
    @include loop-grid-columns($grid-columns, $class, width);
    @include loop-grid-columns($grid-columns, $class, pull);
    @include loop-grid-columns($grid-columns, $class, push);
    @include loop-grid-columns($grid-columns, $class, offset);
  }