export function splitByWidth()

in src/wordBreaker.ts [130:188]
39 lines of code
10 McCabe index (conditional complexity)

export function splitByWidth(
    content: string,
    properties: TextProperties,
    textWidthMeasurer: ITextAsSVGMeasurer,
    maxWidth: number,
    maxNumLines: number,
    truncator?: ITextTruncator): string[] {
    // Default truncator returns string as-is
    truncator = truncator ? truncator : (properties: TextProperties, maxWidth: number) => properties.text;

    let result: string[] = [];
    let words = split(content);

    let usedWidth = 0;
    let wordsInLine: string[] = [];

    for (let word of words) {
        // Last line? Just add whatever is left
        if ((maxNumLines > 0) && (result.length >= maxNumLines - 1)) {
            wordsInLine.push(word);
            continue;
        }

        // Determine width if we add this word
        // Account for SPACE we will add when joining...
        let wordWidth = wordsInLine.length === 0
            ? getWidth(word, properties, textWidthMeasurer)
            : getWidth(SPACE + word, properties, textWidthMeasurer);

        // If width would exceed max width,
        // then push used words and start new split result
        if (usedWidth + wordWidth > maxWidth) {
            // Word alone exceeds max width, just add it.
            if (wordsInLine.length === 0) {
                result.push(truncate(word, properties, truncator, maxWidth));

                usedWidth = 0;
                wordsInLine = [];
                continue;
            }

            result.push(truncate(wordsInLine.join(SPACE), properties, truncator, maxWidth));

            usedWidth = 0;
            wordsInLine = [];
        }

        // ...otherwise, add word and continue
        wordsInLine.push(word);
        usedWidth += wordWidth;
    }

    // Push remaining words onto result (if any)
    if (wordsInLine && wordsInLine.length) {
        result.push(truncate(wordsInLine.join(SPACE), properties, truncator, maxWidth));
    }

    return result;
}