private findAndSetActiveLines()

in src/lib/CodeMirror/indentationMarkers.ts [282:346]

• 45 lines of code
• 13 McCabe index (conditional complexity)

	private findAndSetActiveLines() {
		const currentLine = getCurrentLine(this.state);

		if (!this.has(currentLine)) {
			return;
		}

		let current = this.get(currentLine);

		// check if the current line is starting a new block, if yes, we want to
		// start from inside the block.
		if (this.has(current.line.number + 1)) {
			const next = this.get(current.line.number + 1);
			if (next.level > current.level) {
				current = next;
			}
		}

		// same, but if the current line is ending a block
		if (this.has(current.line.number - 1)) {
			const prev = this.get(current.line.number - 1);
			if (prev.level > current.level) {
				current = prev;
			}
		}

		if (current.level === 0) {
			return;
		}

		current.active = current.level;

		let start: number;
		let end: number;

		// iterate to the start of the block
		for (start = current.line.number; start > 1; start--) {
			if (!this.has(start - 1)) {
				continue;
			}

			const prev = this.get(start - 1);

			if (prev.level < current.level) {
				break;
			}

			prev.active = current.level;
		}

		// iterate to the end of the block
		for (end = current.line.number; end < this.state.doc.lines; end++) {
			if (!this.has(end + 1)) {
				continue;
			}

			const next = this.get(end + 1);

			if (next.level < current.level) {
				break;
			}

			next.active = current.level;
		}
	}