@huridocs/react-text-selection-handler/dist/getRangeSelectedText.js

React pdf handler allows to render a PDF and handle text selection and highlights.

const getLeafNodes = (node) => {
    if (node.nodeType === Node.TEXT_NODE) {
        return [node];
    }
    if (node.nodeType === Node.ELEMENT_NODE) {
        const element = node;
        if (element.tagName === 'BR') {
            return [node];
        }
    }
    return Array.from(node.childNodes).reduce((acc, child) => acc.concat(getLeafNodes(child)), []);
};
const escapeRegExp = (str) => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
export const normalizeSpaces = (text) => {
    const pairedCharacters = {
        '(': ')',
        '[': ']',
        '{': '}',
        '"': '"',
        "'": "'",
    };
    let result = text;
    Object.entries(pairedCharacters).forEach(([openChar, closeChar]) => {
        const escapedOpen = escapeRegExp(openChar);
        const escapedClose = escapeRegExp(closeChar);
        const pattern = new RegExp(`${escapedOpen}\\s*(.*?)\\s*${escapedClose}`, 'g');
        result = result.replace(pattern, `${openChar}$1${closeChar}`);
    });
    const spaceAfterChars = escapeRegExp('$£€@#');
    const spaceBeforeChars = escapeRegExp(',.!?:;');
    result = result.replace(new RegExp(`([${spaceAfterChars}])\\s+`, 'g'), '$1');
    result = result.replace(new RegExp(`\\s+([${spaceBeforeChars}])`, 'g'), '$1');
    return result;
};
export const getRangeSelectedText = (range, containerElement) => {
    const rangeContent = range.cloneContents();
    const elements = getLeafNodes(rangeContent)
        .filter(node => containerElement.contains(range.commonAncestorContainer.contains(node) ? node : range.commonAncestorContainer))
        .map((node) => {
        var _a, _b;
        if (node.nodeType === Node.ELEMENT_NODE) {
            const element = node;
            if (element.tagName === 'BR')
                return '\n';
            return ((_a = element.textContent) === null || _a === void 0 ? void 0 : _a.trim()) || '';
        }
        return ((_b = node.textContent) === null || _b === void 0 ? void 0 : _b.trim()) || '';
    })
        .filter(Boolean);
    return normalizeSpaces(elements.join(' '));
};
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