@lightningjs/renderer
Version:
Lightning 3 Renderer
84 lines • 2.58 kB
JavaScript
/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2025 Comcast Cable Communications Management, 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
*
* 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 invisibleChars = /[\u200B\u200C\u200D\uFEFF\u00AD\u2060]/g;
/**
* Returns CSS font setting string for use in canvas context.
*
* @param fontFace
* @param fontStyle
* @param fontSize
* @param precision
* @param defaultFontFace
* @returns
*/
export function getFontSetting(fontFace, fontStyle, fontSize, precision, defaultFontFace) {
let ff = fontFace;
if (!Array.isArray(ff)) {
ff = [ff];
}
const ffs = [];
for (let i = 0, n = ff.length; i < n; i++) {
let curFf = ff[i];
// Replace the default font face `null` with the actual default font face set
// on the stage.
if (curFf === null || curFf === undefined) {
curFf = defaultFontFace;
}
if (curFf === 'serif' || curFf === 'sans-serif') {
ffs.push(curFf);
}
else {
ffs.push(`"${curFf}"`);
}
}
return `${fontStyle} ${fontSize * precision}px ${ffs.join(',')}`;
}
/**
* Returns true if the given character is a zero-width space.
*
* @param space
*/
export function hasZeroWidthSpace(space) {
return invisibleChars.test(space) === true;
}
/**
* Returns true if the given character is a zero-width space or a regular space.
*
* @param space
*/
export function isSpace(space) {
return hasZeroWidthSpace(space) || space === ' ';
}
/**
* Converts a string into an array of tokens and the words between them.
*
* @param tokenRegex
* @param text
*/
export function tokenizeString(tokenRegex, text) {
const delimeters = text.match(tokenRegex) || [];
const words = text.split(tokenRegex) || [];
const final = [];
for (let i = 0; i < words.length; i++) {
final.push(words[i], delimeters[i]);
}
final.pop();
return final.filter((word) => word != '');
}
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