Function wrapSpannedStringByWord

src/wrapSpannedStringByWord.ts:87–109

(
    spannedString: SpannedString<T>,
    width: number
)

}

export function* wrapSpannedStringByWord<T>(
    spannedString: SpannedString<T>,
    width: number
): Iterable<SpannedString<T>> {
    // Short circuit if no wrapping is required
    const string = spannedString.getString();
    const charWidths = spannedString.getCharWidths();
    const stringWidth = charWidths.reduce((a, b) => a + b, 0);
    if (stringWidth < width) {
        yield spannedString;
        return;
    }

    const lineBreaks = getLineBreaksForString(string, charWidths, width);
    let prevLineBreak = 0;
    for (const lineBreak of lineBreaks) {
        yield spannedString.slice(prevLineBreak, lineBreak);
        prevLineBreak = lineBreak;
    }
    if (prevLineBreak < stringWidth - 1) {
        yield spannedString.slice(prevLineBreak);
    }
}