ink/build/squash-text-nodes.js

React for CLI

import wrapAnsi from 'wrap-ansi';
import sanitizeAnsi from './sanitize-ansi.js';
// Squashing text nodes allows to combine multiple text nodes into one and write
// to `Output` instance only once. For example, <Text>hello{' '}world</Text>
// is actually 3 text nodes, which would result 3 writes to `Output`.
//
// Also, this is necessary for libraries like ink-link (https://github.com/sindresorhus/ink-link),
// which need to wrap all children at once, instead of wrapping 3 text nodes separately.
const squashTextNodes = (node) => {
    let text = '';
    for (const childNode of node.childNodes) {
        let nodeText = '';
        if (childNode.nodeName === '#text') {
            nodeText = childNode.nodeValue;
        }
        else {
            if (childNode.isHidden) {
                continue;
            }
            if (childNode.nodeName === 'ink-text' ||
                childNode.nodeName === 'ink-virtual-text') {
                nodeText = squashTextNodes(childNode);
            }
            // Since these text nodes are being concatenated, `Output` instance won't be able to
            // apply children transform, so we have to do it manually here for each text node
            if (nodeText.length > 0 &&
                typeof childNode.internal_transform === 'function') {
                const transform = childNode.internal_transform;
                nodeText = nodeText
                    .split('\n')
                    .map((line, lineIndex) => transform(line, lineIndex))
                    .join('\n');
            }
        }
        text += nodeText;
    }
    text = sanitizeAnsi(text.replaceAll('\r\n', '\n'));
    // Measurement and styling dependencies understand the ESC forms of these C1 controls.
    text = text.replaceAll('›', '[').replaceAll('', ']').replaceAll('œ', '\\');
    // Expand tabs after combining nested text so measurement and rendering use the same columns.
    if (node.nodeName === 'ink-text' && text.includes('\t')) {
        text = wrapAnsi(text, Infinity, { trim: false });
    }
    return text;
};
export default squashTextNodes;
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