40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
/*
|
|
Copyright 2021 The Matrix.org Foundation C.I.C.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
const offColor = require("off-color").offColor;
|
|
|
|
module.exports.derive = function (value, operation, argument, isDark) {
|
|
const argumentAsNumber = parseInt(argument);
|
|
if (isDark) {
|
|
// For dark themes, invert the operation
|
|
if (operation === 'darker') {
|
|
operation = "lighter";
|
|
}
|
|
else if (operation === 'lighter') {
|
|
operation = "darker";
|
|
}
|
|
}
|
|
switch (operation) {
|
|
case "darker": {
|
|
const newColorString = offColor(value).darken(argumentAsNumber / 100).hex();
|
|
return newColorString;
|
|
}
|
|
case "lighter": {
|
|
const newColorString = offColor(value).lighten(argumentAsNumber / 100).hex();
|
|
return newColorString;
|
|
}
|
|
}
|
|
}
|