Method extractMediaOptions

rev/rev.ts:517–556

(args: string[])

	// ==================== 参数解析 ====================

	// 解析媒体处理参数: h=水平翻转, v=垂直翻转, c=颜色反转
	private extractMediaOptions(args: string[]): MediaOptions {
		let flipMode: FlipMode = null;
		let flipSpecified = false;
		let invertColors = false;
		let index = 0;
		const totalArgs = args.length;

		while (index < args.length) {
			const token = args[index].toLowerCase();

			if (token === 'h') {
				flipMode = 'h';
				flipSpecified = true;
				index++;
			} else if (token === 'v') {
				flipMode = 'v';
				flipSpecified = true;
				index++;
			} else if (token === 'c') {
				invertColors = true;
				index++;
			} else {
				break;
			}
		}

		// 默认行为：如果只有 c 参数，不添加翻转；否则默认水平翻转
		if (
			!flipSpecified &&
			!(invertColors && index === totalArgs && totalArgs > 0)
		) {
			flipMode = 'h';
		}

		return {
			flipMode,
			invertColors,
			remaining: args.slice(index),
		};
	}