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

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

const isElementOnNextLine = (firstElement, secondElement) => {
    var _a, _b;
    if (!firstElement || !secondElement)
        return false;
    const left1 = (_a = firstElement === null || firstElement === void 0 ? void 0 : firstElement.style) === null || _a === void 0 ? void 0 : _a.left;
    const left2 = (_b = secondElement === null || secondElement === void 0 ? void 0 : secondElement.style) === null || _b === void 0 ? void 0 : _b.left;
    return parseFloat(left1) > parseFloat(left2);
};
const prepareSelectedElements = () => {
    const selection = window.getSelection();
    if (!selection || !selection.rangeCount)
        return [];
    const range = selection.getRangeAt(0);
    const selectedContent = range.cloneContents();
    const selectedElements = Array.from(selectedContent.querySelectorAll('*')).filter(element => !element.children.length);
    const elements = [];
    selectedElements.forEach((element, idx) => {
        const previousElement = selectedElements[idx - 1];
        if (previousElement) {
            if (isElementOnNextLine(previousElement, element)) {
                const spacer = document.createElement('span');
                spacer.innerText = ' ';
                elements.push(spacer);
            }
        }
        elements.push(element);
    });
    return elements;
};
export const getSelectedText = () => {
    const elementsSelected = prepareSelectedElements();
    if (elementsSelected.length <= 1) {
        const selection = window.getSelection();
        return (selection && selection.toString()) || '';
    }
    const selectedText = elementsSelected.reduce((acc, el) => {
        let newText = acc;
        newText += el.innerText;
        if (el.tagName === 'BR') {
            newText += '\n';
        }
        return newText;
    }, '');
    return selectedText;
};
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