Function lineRange

docs/components/editor.js:65–71

(text, sel)

    // Full lines covered by `sel`; excludes the trailing line if `sel.end` sits exactly past a `\n`.
    const lineRange = (text, sel) => {
        const start = text.lastIndexOf('\n', sel.start - 1) + 1;
        const anchor = (sel.end > sel.start && text[sel.end - 1] === '\n') ? sel.end - 1 : sel.end;
        let end = text.indexOf('\n', anchor);
        if (end === -1) end = text.length;
        return { start, end };
    };

    // Strip common leading-whitespace from non-empty lines so a snippet pasted from deeper context lands flush.
    const dedentCommon = (s) => {