104 lines
3.8 KiB
SCSS
104 lines
3.8 KiB
SCSS
//************************************************************************//
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// Background property for adding multiple backgrounds using shorthand
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// notation.
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//************************************************************************//
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@mixin background(
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$background-1 , $background-2: false,
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$background-3: false, $background-4: false,
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$background-5: false, $background-6: false,
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$background-7: false, $background-8: false,
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$background-9: false, $background-10: false,
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$fallback: false
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) {
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$backgrounds: compact($background-1, $background-2,
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$background-3, $background-4,
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$background-5, $background-6,
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$background-7, $background-8,
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$background-9, $background-10);
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$fallback-color: false;
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@if (type-of($fallback) == color) or ($fallback == "transparent") {
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$fallback-color: $fallback;
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}
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@else {
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$fallback-color: _extract-background-color($backgrounds);
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}
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@if $fallback-color {
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background-color: $fallback-color;
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}
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background: _background-add-prefix($backgrounds, webkit);
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background: _background-add-prefix($backgrounds);
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}
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@function _extract-background-color($backgrounds) {
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$final-bg-layer: nth($backgrounds, length($backgrounds));
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@if type-of($final-bg-layer) == list {
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@for $i from 1 through length($final-bg-layer) {
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$value: nth($final-bg-layer, $i);
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@if type-of($value) == color {
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@return $value;
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}
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}
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}
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@return false;
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}
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@function _background-add-prefix($backgrounds, $vendor: false) {
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$backgrounds-prefixed: ();
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@for $i from 1 through length($backgrounds) {
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$shorthand: nth($backgrounds, $i); // Get member for current index
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$type: type-of($shorthand); // Get type of variable - List (gradient) or String (image)
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// If shorthand is a list (gradient)
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@if $type == list {
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$first-member: nth($shorthand, 1); // Get first member of shorthand
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// Linear Gradient
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@if index(linear radial, nth($first-member, 1)) {
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$gradient-type: nth($first-member, 1); // linear || radial
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$gradient-args: false;
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$gradient-positions: false;
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$shorthand-start: false;
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@if type-of($first-member) == list { // Linear gradient plus additional shorthand values - lg(red,orange)repeat,...
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$gradient-positions: nth($first-member, 2);
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$gradient-args: nth($first-member, 3);
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$shorthand-start: 2;
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}
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@else { // Linear gradient only - lg(red,orange),...
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$gradient-positions: nth($shorthand, 2);
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$gradient-args: nth($shorthand, 3); // Get gradient (red, blue)
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}
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$gradient-positions: _gradient-positions-parser($gradient-type, $gradient-positions);
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$gradient: _render-gradients($gradient-positions, $gradient-args, $gradient-type, $vendor);
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// Append any additional shorthand args to gradient
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@if $shorthand-start {
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@for $j from $shorthand-start through length($shorthand) {
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$gradient: join($gradient, nth($shorthand, $j), space);
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}
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}
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$backgrounds-prefixed: append($backgrounds-prefixed, $gradient, comma);
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}
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// Image with additional properties
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@else {
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$backgrounds-prefixed: append($backgrounds-prefixed, $shorthand, comma);
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}
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}
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// If shorthand is a simple string (color or image)
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@else if $type == string {
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$backgrounds-prefixed: join($backgrounds-prefixed, $shorthand, comma);
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}
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}
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@return $backgrounds-prefixed;
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}
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//Examples:
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//@include background(linear-gradient(top, orange, red));
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//@include background(radial-gradient(circle at 40% 40%, orange, red));
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//@include background(url("/images/a.png") no-repeat, linear-gradient(orange, red));
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//@include background(url("image.png") center center, linear-gradient(orange, red), url("image.png"));
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