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customConstants.js
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customConstants.js
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/*
* Copyright 2020 Google LLC
*
* 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
*
* https://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.
*/
export const NONE = 'NONE';
export const ITALIC = 'CUSTOM-ITALIC';
export const UNDERLINE = 'CUSTOM-UNDERLINE';
export const WEIGHT = 'CUSTOM-WEIGHT';
export const COLOR = 'CUSTOM-COLOR';
export const LETTERSPACING = 'CUSTOM-LETTERSPACING';
export const NORMAL_WEIGHT = 400;
export const SMALLEST_BOLD = 600;
export const DEFAULT_BOLD = 700;
export const weightToStyle = (weight) => `${WEIGHT}-${weight}`;
export const colorToStyle = (color) => `${COLOR}-${color}`;
export const lsToStyle = (ls) => `${LETTERSPACING}-${ls}`;
export const isStyle = (style, prefix) =>
typeof style === 'string' && style.startsWith(prefix);
export const getVariable = (style, prefix) => style.slice(prefix.length + 1);
export const styleToWeight = (style) =>
isStyle(style, WEIGHT) ? parseInt(getVariable(style, WEIGHT)) : null;
export const styleToColor = (style) =>
isStyle(style, COLOR) ? getVariable(style, COLOR) : null;
export const styleToLs = (style) =>
isStyle(style, LETTERSPACING)
? parseInt(getVariable(style, LETTERSPACING))
: null;