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- //
- // Copyright 2020 Google Inc.
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the "Software"), to deal
- // in the Software without restriction, including without limitation the rights
- // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- // THE SOFTWARE.
- //
- @use 'sass:list';
- @use 'sass:meta';
- @use 'sass:string';
- /// Replaces all name instances in the provided string with values from the
- /// provided replacement Map whose keys correspond to the name instances.
- /// Returns a new string with the replacements applied.
- ///
- /// @example
- /// replace-string('calc(x + y)', (x: 16px, y: 50%)); // 'calc(16px + 50%)'
- ///
- /// @example
- /// $foo: custom-properties.create-var(custom-properties.create(--foo, 8px));
- /// replace-string('calc(foo)', (foo: $foo)); // 'calc(var(--foo, 8px))';
- ///
- /// @access private
- /// @param {String} $string - The string to make replacements on.
- /// @param {Map} $replace-map - A Map of name/value replacements. The keys of
- /// the Map are names that will be replaced in the string with the keys'
- /// respective values.
- /// @return {String} The string with replacements made, if any.
- @function replace-string($string, $replace-map) {
- @if meta.type-of($replace-map) != 'map' {
- @error 'mdc-theme: Invalid replacement #{$replace-map}. Must be a Map.';
- }
- @each $name, $replacement in $replace-map {
- // Since the replacement values may contain the name themselves (such as
- // a custom property: name "foo" and value "var(--foo)"), gather the indices
- // first before replacing.
- $indices: ();
- $substring: $string;
- $prev-index: null;
- $index: string.index($substring, $name);
- @while $index {
- $substring: string.slice($substring, $index + string.length($name));
- @if $prev-index {
- // Add previous index's value to switch from "substring index" to
- // absolute string index. Also add length - 1 since slice removes
- // the entire word as well as lists being 1 indexed
- $index: $index + $prev-index + string.length($name) - 1;
- }
- // Use list.join() to "prepend" the index to the start of the list. This
- // allows us to iterate "backwards" later.
- $indices: list.join($index, $indices);
- $prev-index: $index;
- $index: string.index($substring, $name);
- }
- // Since we "prepended" the indices, the list is sorted backwards, with the
- // last index first. Replacing values last index to first index removes the
- // need for us to adjust the indices as we replace them.
- @each $index in $indices {
- $before: string.slice($string, 1, $index - 1);
- $after: string.slice($string, $index + string.length($name));
- $string: $before + $replacement + $after;
- }
- }
- @return $string;
- }
- /// Replaces all value instances in the provided list with values from the
- /// provided replacement Map whose keys correspond to the name instances.
- /// Returns a new list with the replacements applied.
- ///
- /// @example
- /// replace-list(0 value, (value: 16px)); // (0 16px)
- ///
- /// @see {mixin} replace-string
- ///
- /// @access private
- /// @param {List} $list - The list to make replacements on.
- /// @param {Map} $replace-map - A Map of name/value replacements. The keys of
- /// the Map are names that will be replaced in the list with the keys'
- /// respective values.
- /// property value replacements instead of the `var()` declaration.
- /// @return {List} A new list with replacements made, if any.
- @function replace-list($list, $replace-map) {
- $separator: list.separator($list);
- $replaced-list: ();
- @each $value in $list {
- @if meta.type-of($value) == 'string' {
- $replaced-list: list.append(
- $replaced-list,
- replace-string($value, $replace-map),
- $separator
- );
- } @else if meta.type-of($value) == 'list' {
- $replaced-list: list.append(
- $replaced-list,
- replace-list($value, $replace-map),
- $separator
- );
- } @else {
- $replaced-list: list.append($replaced-list, $value, $separator);
- }
- }
- @return $replaced-list;
- }
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