mirror of
https://github.com/twbs/bootstrap.git
synced 2022-11-09 12:25:43 -05:00
312 lines
8.6 KiB
SCSS
312 lines
8.6 KiB
SCSS
// stylelint-disable property-blacklist, scss/dollar-variable-default
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// SCSS RFS mixin
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//
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// Automated responsive values for font sizes, paddings, margins and much more
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//
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// Licensed under MIT (https://github.com/twbs/rfs/blob/master/LICENSE)
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// Configuration
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// Base value
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$rfs-base-value: 1.25rem !default;
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$rfs-unit: rem !default;
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@if $rfs-unit != rem and $rfs-unit != px {
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@error "`#{$rfs-unit}` is not a valid unit for $rfs-unit. Use `px` or `rem`.";
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}
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// Breakpoint at where values start decreasing if screen width is smaller
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$rfs-breakpoint: 1200px !default;
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$rfs-breakpoint-unit: px !default;
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@if $rfs-breakpoint-unit != px and $rfs-breakpoint-unit != em and $rfs-breakpoint-unit != rem {
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@error "`#{$rfs-breakpoint-unit}` is not a valid unit for $rfs-breakpoint-unit. Use `px`, `em` or `rem`.";
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}
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// Resize values based on screen height and width
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$rfs-two-dimensional: false !default;
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// Factor of decrease
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$rfs-factor: 10 !default;
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@if type-of($rfs-factor) != number or $rfs-factor <= 1 {
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@error "`#{$rfs-factor}` is not a valid $rfs-factor, it must be greater than 1.";
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}
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// Mode. Possibilities: "min-media-query", "max-media-query"
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$rfs-mode: min-media-query !default;
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// Generate enable or disable classes. Possibilities: false, "enable" or "disable"
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$rfs-class: false !default;
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// 1 rem = $rfs-rem-value px
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$rfs-rem-value: 16 !default;
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// Safari iframe resize bug: https://github.com/twbs/rfs/issues/14
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$rfs-safari-iframe-resize-bug-fix: false !default;
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// Disable RFS by setting $enable-rfs to false
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$enable-rfs: true !default;
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// Cache $rfs-base-value unit
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$rfs-base-value-unit: unit($rfs-base-value);
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// Remove px-unit from $rfs-base-value for calculations
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@if $rfs-base-value-unit == px {
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$rfs-base-value: $rfs-base-value / ($rfs-base-value * 0 + 1);
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}
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@else if $rfs-base-value-unit == rem {
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$rfs-base-value: $rfs-base-value / ($rfs-base-value * 0 + 1 / $rfs-rem-value);
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}
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// Cache $rfs-breakpoint unit to prevent multiple calls
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$rfs-breakpoint-unit-cache: unit($rfs-breakpoint);
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// Remove unit from $rfs-breakpoint for calculations
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@if $rfs-breakpoint-unit-cache == px {
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$rfs-breakpoint: $rfs-breakpoint / ($rfs-breakpoint * 0 + 1);
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}
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@else if $rfs-breakpoint-unit-cache == rem or $rfs-breakpoint-unit-cache == "em" {
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$rfs-breakpoint: $rfs-breakpoint / ($rfs-breakpoint * 0 + 1 / $rfs-rem-value);
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}
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// Calculate the media query value
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$rfs-mq-value: if($rfs-breakpoint-unit == px, #{$rfs-breakpoint}px, #{$rfs-breakpoint / $rfs-rem-value}#{$rfs-breakpoint-unit});
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$rfs-mq-property-width: if($rfs-mode == max-media-query, max-width, min-width);
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$rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height);
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// Internal mixin used to determine which media query needs to be used
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@mixin _rfs-media-query {
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@if $rfs-two-dimensional {
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@if $rfs-mode == max-media-query {
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@media (#{$rfs-mq-property-width}: #{$rfs-mq-value}), (#{$rfs-mq-property-height}: #{$rfs-mq-value}) {
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@content;
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}
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}
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@else {
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@media (#{$rfs-mq-property-width}: #{$rfs-mq-value}) and (#{$rfs-mq-property-height}: #{$rfs-mq-value}) {
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@content;
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}
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}
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}
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@else {
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@media (#{$rfs-mq-property-width}: #{$rfs-mq-value}) {
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@content;
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}
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}
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}
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// Internal mixin that adds disable classes to the selector if needed.
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@mixin _rfs-rule {
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@if $rfs-class == disable and $rfs-mode == max-media-query {
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// Adding an extra class increases specificity, which prevents the media query to override the property
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&,
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.disable-rfs &,
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&.disable-rfs {
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@content;
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}
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}
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@else if $rfs-class == enable and $rfs-mode == min-media-query {
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.enable-rfs &,
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&.enable-rfs {
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@content;
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}
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}
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@else {
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@content;
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}
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}
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// Internal mixin that adds enable classes to the selector if needed.
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@mixin _rfs-media-query-rule {
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@if $rfs-class == enable {
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@if $rfs-mode == min-media-query {
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@content;
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}
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@include _rfs-media-query {
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.enable-rfs &,
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&.enable-rfs {
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@content;
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}
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}
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}
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@else {
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@if $rfs-class == disable and $rfs-mode == min-media-query {
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.disable-rfs &,
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&.disable-rfs {
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@content;
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}
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}
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@include _rfs-media-query {
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@content;
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}
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}
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}
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// Helper function to get the formatted non-responsive value
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@function rfs-value($values) {
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// Convert to list
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$values: if(type-of($values) != list, ($values,), $values);
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$val: '';
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// Loop over each value and calculate value
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@each $value in $values {
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@if $value == 0 {
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$val: $val + ' 0';
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}
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@else {
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// Cache $value unit
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$unit: if(type-of($value) == "number", unit($value), false);
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@if $unit == px {
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// Convert to rem if needed
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$val: $val + ' ' + if($rfs-unit == rem, #{$value / ($value * 0 + $rfs-rem-value)}rem, $value);
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}
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@else if $unit == rem {
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// Convert to px if needed
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$val: $val + ' ' + if($rfs-unit == px, #{$value / ($value * 0 + 1) * $rfs-rem-value}px, $value);
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}
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@else {
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// If $value isn't a number (like inherit) or $value has a unit (not px or rem, like 1.5em) or $ is 0, just print the value
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$val: $val + ' ' + $value;
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}
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}
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}
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// Remove first space
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@return unquote(str-slice($val, 2));
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}
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// Helper function to get the responsive value calculated by RFS
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@function rfs-fluid-value($values) {
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// Convert to list
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$values: if(type-of($values) != list, ($values,), $values);
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$val: '';
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// Loop over each value and calculate value
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@each $value in $values {
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@if $value == 0 {
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$val: $val + ' 0';
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}
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@else {
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// Cache $value unit
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$unit: if(type-of($value) == "number", unit($value), false);
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// If $value isn't a number (like inherit) or $value has a unit (not px or rem, like 1.5em) or $ is 0, just print the value
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@if not $unit or $unit != px and $unit != rem {
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$val: $val + ' ' + $value;
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}
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@else {
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// Remove unit from $value for calculations
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$value: $value / ($value * 0 + if($unit == px, 1, 1 / $rfs-rem-value));
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// Only add the media query if the value is greater than the minimum value
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@if abs($value) <= $rfs-base-value or not $enable-rfs {
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$val: $val + ' ' + if($rfs-unit == rem, #{$value / $rfs-rem-value}rem, #{$value}px);
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}
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@else {
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// Calculate the minimum value
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$value-min: $rfs-base-value + (abs($value) - $rfs-base-value) / $rfs-factor;
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// Calculate difference between $value and the minimum value
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$value-diff: abs($value) - $value-min;
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// Base value formatting
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$min-width: if($rfs-unit == rem, #{$value-min / $rfs-rem-value}rem, #{$value-min}px);
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// Use negative value if needed
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$min-width: if($value < 0, -$min-width, $min-width);
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// Use `vmin` if two-dimensional is enabled
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$variable-unit: if($rfs-two-dimensional, vmin, vw);
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// Calculate the variable width between 0 and $rfs-breakpoint
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$variable-width: #{$value-diff * 100 / $rfs-breakpoint}#{$variable-unit};
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// Return the calculated value
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$val: $val + ' calc(' + $min-width + if($value < 0, ' - ', ' + ') + $variable-width + ')';
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}
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}
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}
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}
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// Remove first space
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@return unquote(str-slice($val, 2));
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}
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// RFS mixin
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@mixin rfs($values, $property: font-size) {
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@if $values != null {
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$val: rfs-value($values);
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$fluidVal: rfs-fluid-value($values);
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// Do not print the media query if responsive & non-responsive values are the same
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@if $val == $fluidVal {
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#{$property}: $val;
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}
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@else {
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@include _rfs-rule {
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#{$property}: if($rfs-mode == max-media-query, $val, $fluidVal);
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// Include safari iframe resize fix if needed
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min-width: if($rfs-safari-iframe-resize-bug-fix, (0 * 1vw), null);
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}
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@include _rfs-media-query-rule {
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#{$property}: if($rfs-mode == max-media-query, $fluidVal, $val);
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}
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}
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}
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}
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// Shorthand helper mixins
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@mixin font-size($value) {
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@include rfs($value);
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}
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@mixin padding($value) {
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@include rfs($value, padding);
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}
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@mixin padding-top($value) {
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@include rfs($value, padding-top);
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}
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@mixin padding-right($value) {
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@include rfs($value, padding-right);
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}
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@mixin padding-bottom($value) {
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@include rfs($value, padding-bottom);
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}
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@mixin padding-left($value) {
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@include rfs($value, padding-left);
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}
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@mixin margin($value) {
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@include rfs($value, margin);
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}
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@mixin margin-top($value) {
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@include rfs($value, margin-top);
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}
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@mixin margin-right($value) {
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@include rfs($value, margin-right);
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}
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@mixin margin-bottom($value) {
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@include rfs($value, margin-bottom);
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}
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@mixin margin-left($value) {
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@include rfs($value, margin-left);
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}
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