Proyectos de Subversion Moodle

// Breakpoint viewport sizes and media queries.

//

// Breakpoints are defined as a map of (name: minimum width), order from small to large:

//

//    (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)

//

// The map defined in the `$grid-breakpoints` global variable is used as the `$breakpoints` argument by default.

// Name of the next breakpoint, or null for the last breakpoint.

//

//    >> breakpoint-next(sm)

//    md

//    >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))

//    md

//    >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl xxl))

//    md

@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {

  $n: index($breakpoint-names, $name);

  @if not $n {

    @error "breakpoint `#{$name}` not found in `#{$breakpoints}`";

  }

  @return if($n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);

}

// Minimum breakpoint width. Null for the smallest (first) breakpoint.

//

//    >> breakpoint-min(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))

//    576px

@function breakpoint-min($name, $breakpoints: $grid-breakpoints) {

  $min: map-get($breakpoints, $name);

  @return if($min != 0, $min, null);

}

// Maximum breakpoint width.

// The maximum value is reduced by 0.02px to work around the limitations of

// `min-` and `max-` prefixes and viewports with fractional widths.

// See https://www.w3.org/TR/mediaqueries-4/#mq-min-max

// Uses 0.02px rather than 0.01px to work around a current rounding bug in Safari.

// See https://bugs.webkit.org/show_bug.cgi?id=178261

//

//    >> breakpoint-max(md, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))

//    767.98px

@function breakpoint-max($name, $breakpoints: $grid-breakpoints) {

  $max: map-get($breakpoints, $name);

  @return if($max and $max > 0, $max - .02, null);

}

// Returns a blank string if smallest breakpoint, otherwise returns the name with a dash in front.

// Useful for making responsive utilities.

//

//    >> breakpoint-infix(xs, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))

//    ""  (Returns a blank string)

//    >> breakpoint-infix(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))

//    "-sm"

@function breakpoint-infix($name, $breakpoints: $grid-breakpoints) {

  @return if(breakpoint-min($name, $breakpoints) == null, "", "-#{$name}");

}

// Media of at least the minimum breakpoint width. No query for the smallest breakpoint.

// Makes the @content apply to the given breakpoint and wider.

@mixin media-breakpoint-up($name, $breakpoints: $grid-breakpoints) {

  $min: breakpoint-min($name, $breakpoints);

  @if $min {

    @media (min-width: $min) {

      @content;

    }

  } @else {

    @content;

  }

}

// Media of at most the maximum breakpoint width. No query for the largest breakpoint.

// Makes the @content apply to the given breakpoint and narrower.

@mixin media-breakpoint-down($name, $breakpoints: $grid-breakpoints) {

  $max: breakpoint-max($name, $breakpoints);

  @if $max {

    @media (max-width: $max) {

      @content;

    }

  } @else {

    @content;

  }

}

// Media that spans multiple breakpoint widths.

// Makes the @content apply between the min and max breakpoints

@mixin media-breakpoint-between($lower, $upper, $breakpoints: $grid-breakpoints) {

  $min: breakpoint-min($lower, $breakpoints);

  $max: breakpoint-max($upper, $breakpoints);

  @if $min != null and $max != null {

    @media (min-width: $min) and (max-width: $max) {

      @content;

    }

  } @else if $max == null {

    @include media-breakpoint-up($lower, $breakpoints) {

      @content;

    }

  } @else if $min == null {

    @include media-breakpoint-down($upper, $breakpoints) {

      @content;

    }

  }

}

// Media between the breakpoint's minimum and maximum widths.

// No minimum for the smallest breakpoint, and no maximum for the largest one.

// Makes the @content apply only to the given breakpoint, not viewports any wider or narrower.

@mixin media-breakpoint-only($name, $breakpoints: $grid-breakpoints) {

  $min:  breakpoint-min($name, $breakpoints);

  $next: breakpoint-next($name, $breakpoints);

  $max:  breakpoint-max($next, $breakpoints);

  @if $min != null and $max != null {

    @media (min-width: $min) and (max-width: $max) {

      @content;

    }

  } @else if $max == null {

    @include media-breakpoint-up($name, $breakpoints) {

      @content;

    }

  } @else if $min == null {

    @include media-breakpoint-down($next, $breakpoints) {

      @content;

    }

  }

}