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// Not function for Libsass compatibility
// https://github.com/sass/libsass/issues/368
@function is-not($value) {
@return if($value, false, true);
}
// Checks if a number is even
@function is-even($int) {
@return $int % 2 == 0;
}
// Checks if an element belongs to a list or not
@function belongs-to($tested-item, $list) {
@return is-not(not-belongs-to($tested-item, $list));
}
@function not-belongs-to($tested-item, $list) {
@return is-not(index($list, $tested-item));
}
// Contains display value
@function contains-display-value($query) {
@return belongs-to(table, $query)
or belongs-to(block, $query)
or belongs-to(inline-block, $query)
or belongs-to(inline, $query);
}
// Parses the first argument of span-columns()
@function container-span($span: $span) {
@if length($span) == 3 {
$container-columns: nth($span, 3);
@return $container-columns;
} @else if length($span) == 2 {
$container-columns: nth($span, 2);
@return $container-columns;
}
@return $grid-columns;
}
@function container-shift($shift: $shift) {
$parent-columns: $grid-columns !default !global;
@if length($shift) == 3 {
$container-columns: nth($shift, 3);
@return $container-columns;
} @else if length($shift) == 2 {
$container-columns: nth($shift, 2);
@return $container-columns;
}
@return $parent-columns;
}
// Generates a striped background
@function gradient-stops($grid-columns, $color: $visual-grid-color) {
$transparent: transparent;
$alt-color: darken($color, 10%);
$column-width: flex-grid(1, $grid-columns);
$gutter-width: flex-gutter($grid-columns);
$column-offset: $column-width;
$alternate: false;
$values: ($transparent 0, if($alternate, $color, $alt-color) 0);
@for $i from 1 to $grid-columns*2 {
@if is-even($i) {
$values: append($values, $transparent $column-offset, comma);
$values: append($values, if($alternate, $color, $alt-color) $column-offset, comma);
$column-offset: $column-offset + $column-width;
} @else {
$values: append($values, if($alternate, $color, $alt-color) $column-offset, comma);
$values: append($values, $transparent $column-offset, comma);
$column-offset: $column-offset + $gutter-width;
$alternate: not $alternate;
}
}
@return $values;
}
// Layout direction
@function get-direction($layout, $default) {
$direction: null;
@if to-upper-case($layout) == "LTR" or to-upper-case($layout) == "RTL" {
$direction: direction-from-layout($layout);
} @else {
$direction: direction-from-layout($default);
}
@return $direction;
}
@function direction-from-layout($layout) {
$direction: null;
@if to-upper-case($layout) == "LTR" {
$direction: right;
} @else {
$direction: left;
}
@return $direction;
}
@function get-opposite-direction($direction) {
$opposite-direction: left;
@if $direction == "left" {
$opposite-direction: right;
}
@return $opposite-direction;
}
@function to-number($string) {
$string: str-replace($string, " ", "");
$strings: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9";
$numbers: 0 1 2 3 4 5 6 7 8 9;
$result: 0;
@for $i from 1 through str-length($string) {
$character: str-slice($string, $i, $i);
$index: index($strings, $character);
@if not $index {
@warn "Unknown character `#{$character}`.";
@return false;
}
$number: nth($numbers, $index);
$result: $result * 10 + $number;
}
@return $result;
}
@function str-replace($string, $search, $replace: "") {
$index: str-index($string, $search);
@if $index {
$first: str-slice($string, 1, $index - 1);
$last-slice: str-slice($string, $index + str-length($search));
$last: str-replace($last-slice, $search, $replace);
@return $first + $replace + $last;
}
@return $string;
}
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