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Add add and subtract function

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This commit is contained in:
ysds 2019-09-03 20:18:44 +03:00 committed by XhmikosR
parent ed4a4e6081
commit 7bd70e54f2
5 changed files with 97 additions and 22 deletions
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37
scss/_functions.scss
View File

@ -95,3 +95,40 @@
@return mix($color-base, $color, $level * $theme-color-interval);
}
// Return valid calc
@function add($value1, $value2, $return-calc: true) {
@if $value1 == null {
@return $value2;
}
@if $value2 == null {
@return $value1;
}
@if type-of($value1) == number and type-of($value2) == number and comparable($value1, $value2) {
@return $value1 + $value2;
}
@return if($return-calc == true, calc(#{$value1} + #{$value2}), #{$value1} + #{$value2});
}
@function subtract($value1, $value2, $return-calc: true) {
@if $value1 == null and $value2 == null {
@return null;
}
@if $value1 == null {
@return -$value2;
}
@if $value2 == null {
@return $value1;
}
@if type-of($value1) == number and type-of($value2) == number and comparable($value1, $value2) {
@return $value1 - $value2;
}
@return if($return-calc == true, calc(#{$value1} - #{$value2}), #{$value1} - #{$value2});
}

16
scss/_modal.scss
View File

@ -52,10 +52,10 @@
.modal-dialog-scrollable {
display: flex; // IE10/11
max-height: calc(100% - #{$modal-dialog-margin * 2});
max-height: subtract(100%, $modal-dialog-margin * 2);
.modal-content {
max-height: calc(100vh - #{$modal-dialog-margin * 2}); // IE10/11
max-height: subtract(100vh, $modal-dialog-margin * 2); // IE10/11
overflow: hidden;
}
@ -72,12 +72,12 @@
.modal-dialog-centered {
display: flex;
align-items: center;
min-height: calc(100% - #{$modal-dialog-margin * 2});
min-height: subtract(100%, $modal-dialog-margin * 2);
// Ensure `modal-dialog-centered` extends the full height of the view (IE10/11)
&::before {
display: block; // IE10
height: calc(100vh - #{$modal-dialog-margin * 2});
height: subtract(100vh, $modal-dialog-margin * 2);
content: "";
}
@ -200,18 +200,18 @@
}
.modal-dialog-scrollable {
max-height: calc(100% - #{$modal-dialog-margin-y-sm-up * 2});
max-height: subtract(100%, $modal-dialog-margin-y-sm-up * 2);
.modal-content {
max-height: calc(100vh - #{$modal-dialog-margin-y-sm-up * 2});
max-height: subtract(100vh, $modal-dialog-margin-y-sm-up * 2);
}
}
.modal-dialog-centered {
min-height: calc(100% - #{$modal-dialog-margin-y-sm-up * 2});
min-height: subtract(100%, $modal-dialog-margin-y-sm-up * 2);
&::before {
height: calc(100vh - #{$modal-dialog-margin-y-sm-up * 2});
height: subtract(100vh, $modal-dialog-margin-y-sm-up * 2);
}
}

8
scss/_popover.scss
View File

@ -39,7 +39,7 @@
margin-bottom: $popover-arrow-height;
> .arrow {
bottom: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
bottom: subtract(-$popover-arrow-height, $popover-border-width);
&::before {
bottom: 0;
@ -59,7 +59,7 @@
margin-left: $popover-arrow-height;
> .arrow {
left: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
left: subtract(-$popover-arrow-height, $popover-border-width);
width: $popover-arrow-height;
height: $popover-arrow-width;
margin: $popover-border-radius 0; // make sure the arrow does not touch the popover's rounded corners
@ -82,7 +82,7 @@
margin-top: $popover-arrow-height;
> .arrow {
top: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
top: subtract(-$popover-arrow-height, $popover-border-width);
&::before {
top: 0;
@ -114,7 +114,7 @@
margin-right: $popover-arrow-height;
> .arrow {
right: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
right: subtract(-$popover-arrow-height, $popover-border-width);
width: $popover-arrow-height;
height: $popover-arrow-width;
margin: $popover-border-radius 0; // make sure the arrow does not touch the popover's rounded corners

20
scss/_variables.scss
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@ -495,13 +495,13 @@ $input-plaintext-color: $body-color !default;
$input-height-border: $input-border-width * 2 !default;
$input-height-inner: calc(#{$input-line-height * 1em} + #{$input-padding-y * 2}) !default;
$input-height-inner-half: calc(#{$input-line-height * .5em} + #{$input-padding-y}) !default;
$input-height-inner-quarter: calc(#{$input-line-height * .25em} + #{$input-padding-y / 2}) !default;
$input-height-inner: add($input-line-height * 1em, $input-padding-y * 2) !default;
$input-height-inner-half: add($input-line-height * .5em, $input-padding-y) !default;
$input-height-inner-quarter: add($input-line-height * .25em, $input-padding-y / 2) !default;
$input-height: calc(#{$input-line-height * 1em} + #{$input-padding-y * 2} + #{$input-height-border}) !default;
$input-height-sm: calc(#{$input-line-height-sm * 1em} + #{$input-btn-padding-y-sm * 2} + #{$input-height-border}) !default;
$input-height-lg: calc(#{$input-line-height-lg * 1em} + #{$input-btn-padding-y-lg * 2} + #{$input-height-border}) !default;
$input-height: add($input-line-height * 1em, add($input-padding-y * 2, $input-height-border, false)) !default;
$input-height-sm: add($input-line-height-sm * 1em, add($input-btn-padding-y-sm * 2, $input-height-border, false)) !default;
$input-height-lg: add($input-line-height-lg * 1em, add($input-btn-padding-y-lg * 2, $input-height-border, false)) !default;
$input-transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out !default;
@ -766,7 +766,7 @@ $dropdown-bg: $white !default;
$dropdown-border-color: rgba($black, .15) !default;
$dropdown-border-radius: $border-radius !default;
$dropdown-border-width: $border-width !default;
$dropdown-inner-border-radius: calc(#{$dropdown-border-radius} - #{$dropdown-border-width}) !default;
$dropdown-inner-border-radius: subtract($dropdown-border-radius, $dropdown-border-width) !default;
$dropdown-divider-bg: $gray-200 !default;
$dropdown-divider-margin-y: $nav-divider-margin-y !default;
$dropdown-box-shadow: 0 .5rem 1rem rgba($black, .175) !default;
@ -831,7 +831,7 @@ $card-spacer-x: 1.25rem !default;
$card-border-width: $border-width !default;
$card-border-radius: $border-radius !default;
$card-border-color: rgba($black, .125) !default;
$card-inner-border-radius: calc(#{$card-border-radius} - #{$card-border-width}) !default;
$card-inner-border-radius: subtract($card-border-radius, $card-border-width) !default;
$card-cap-bg: rgba($black, .03) !default;
$card-cap-color: null !default;
$card-height: null !default;
@ -881,7 +881,7 @@ $popover-max-width: 276px !default;
$popover-border-width: $border-width !default;
$popover-border-color: rgba($black, .2) !default;
$popover-border-radius: $border-radius-lg !default;
$popover-inner-border-radius: calc(#{$popover-border-radius} - #{$popover-border-width}) !default;
$popover-inner-border-radius: subtract($popover-border-radius, $popover-border-width) !default;
$popover-box-shadow: 0 .25rem .5rem rgba($black, .2) !default;
$popover-header-bg: darken($popover-bg, 3%) !default;
@ -953,7 +953,7 @@ $modal-content-bg: $white !default;
$modal-content-border-color: rgba($black, .2) !default;
$modal-content-border-width: $border-width !default;
$modal-content-border-radius: $border-radius-lg !default;
$modal-content-inner-border-radius: calc(#{$modal-content-border-radius} - #{$modal-content-border-width}) !default;
$modal-content-inner-border-radius: subtract($modal-content-border-radius, $modal-content-border-width) !default;
$modal-content-box-shadow-xs: 0 .25rem .5rem rgba($black, .5) !default;
$modal-content-box-shadow-sm-up: 0 .5rem 1rem rgba($black, .5) !default;

38
site/docs/4.3/getting-started/theming.md
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@ -227,6 +227,44 @@ You can also specify a base color with our color map functions:
We use the `escape-svg` function to escape the `<`, `>` and `#` characters for SVG background images. These characters need to be escaped to properly render the background images in IE.
## Add and Subtract function
We use the `add` and `subtract` functions instead of the CSS `calc` function. The primary purpose of these functions is to avoid errors when "unitless" 0 is given to the `calc` expression.
Example where the calc is valid:
{{< highlight scss >}}
$border-radius: .25rem;
$border-width: 1px;
.element {
// Output calc(.25rem - 1px) is valid
border-radius: calc($border-radius - $border-width);
}
.element {
// Output the same calc(.25rem - 1px) as above
border-radius: subtract($border-radius, $border-width);
}
{{< /highlight >}}
Example where the calc is invalid:
{{< highlight scss >}}
$border-radius: .25rem;
$border-width: 0;
.element {
// Output calc(.25rem - 0) is invalid
border-radius: calc($border-radius - $border-width);
}
.element {
// Output .25rem
border-radius: subtract($border-radius, $border-width);
}
{{< /highlight >}}
## Sass options
Customize Bootstrap 4 with our built-in custom variables file and easily toggle global CSS preferences with new `$enable-*` Sass variables. Override a variable's value and recompile with `npm run test` as needed.