function handleCaptures()

in src/grammar.ts [686:757]
52 lines of code
14 McCabe index (conditional complexity)

function handleCaptures(grammar: Grammar, lineText: OnigString, isFirstLine: boolean, stack: StackElement, lineTokens: LineTokens, captures: (CaptureRule | null)[], captureIndices: IOnigCaptureIndex[]): void {
	if (captures.length === 0) {
		return;
	}

	const lineTextContent = lineText.content;

	const len = Math.min(captures.length, captureIndices.length);
	const localStack: LocalStackElement[] = [];
	const maxEnd = captureIndices[0].end;

	for (let i = 0; i < len; i++) {
		const captureRule = captures[i];
		if (captureRule === null) {
			// Not interested
			continue;
		}

		const captureIndex = captureIndices[i];

		if (captureIndex.length === 0) {
			// Nothing really captured
			continue;
		}

		if (captureIndex.start > maxEnd) {
			// Capture going beyond consumed string
			break;
		}

		// pop captures while needed
		while (localStack.length > 0 && localStack[localStack.length - 1].endPos <= captureIndex.start) {
			// pop!
			lineTokens.produceFromScopes(localStack[localStack.length - 1].scopes, localStack[localStack.length - 1].endPos);
			localStack.pop();
		}

		if (localStack.length > 0) {
			lineTokens.produceFromScopes(localStack[localStack.length - 1].scopes, captureIndex.start);
		} else {
			lineTokens.produce(stack, captureIndex.start);
		}

		if (captureRule.retokenizeCapturedWithRuleId) {
			// the capture requires additional matching
			const scopeName = captureRule.getName(lineTextContent, captureIndices);
			const nameScopesList = stack.contentNameScopesList.push(grammar, scopeName);
			const contentName = captureRule.getContentName(lineTextContent, captureIndices);
			const contentNameScopesList = nameScopesList.push(grammar, contentName);

			const stackClone = stack.push(captureRule.retokenizeCapturedWithRuleId, captureIndex.start, -1, false, null, nameScopesList, contentNameScopesList);
			const onigSubStr = grammar.createOnigString(lineTextContent.substring(0, captureIndex.end));
			_tokenizeString(grammar, onigSubStr, (isFirstLine && captureIndex.start === 0), captureIndex.start, stackClone, lineTokens, false, /* no time limit */0);
			disposeOnigString(onigSubStr);
			continue;
		}

		const captureRuleScopeName = captureRule.getName(lineTextContent, captureIndices);
		if (captureRuleScopeName !== null) {
			// push
			const base = localStack.length > 0 ? localStack[localStack.length - 1].scopes : stack.contentNameScopesList;
			const captureRuleScopesList = base.push(grammar, captureRuleScopeName);
			localStack.push(new LocalStackElement(captureRuleScopesList, captureIndex.end));
		}
	}

	while (localStack.length > 0) {
		// pop!
		lineTokens.produceFromScopes(localStack[localStack.length - 1].scopes, localStack[localStack.length - 1].endPos);
		localStack.pop();
	}
}