46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
/**
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* Regular expression to match `:whitespace` directive in code block info
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*
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* 匹配代码块信息中 `:whitespace` 指令的正则表达式
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*/
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export const WHITESPACE_REGEXP = /:whitespace(?:=(all|boundary|trailing)?)?\b/;
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/**
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* Regular expression to match `:no-whitespace` directive in code block info
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*
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* 匹配代码块信息中 `:no-whitespace` 指令的正则表达式
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*/
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export const NO_WHITESPACE_REGEXP = /:no-whitespace\b/;
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const AVAILABLE_WHITESPACE_POSITIONS = ['all', 'boundary', 'trailing'];
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/**
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* Resolve whitespace position from code block info and global option
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*
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* 从代码块信息和全局选项中解析空白符位置
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*
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* @param info - Code block info string / 代码块信息字符串
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* @param globalOption - Global whitespace option / 全局空白符选项
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* @returns Resolved whitespace position or false if disabled / 解析的空白符位置，如果禁用则返回 false
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*
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* @example
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* ```ts
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* resolveWhitespacePosition('js :whitespace=all', 'boundary') // 'all'
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* resolveWhitespacePosition('js :no-whitespace', 'boundary') // false
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* resolveWhitespacePosition('js', 'boundary') // 'boundary'
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* ```
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*/
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export const resolveWhitespacePosition = (info, globalOption) => {
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if (NO_WHITESPACE_REGEXP.test(info)) {
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return false;
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}
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const defaultPosition = AVAILABLE_WHITESPACE_POSITIONS.includes(globalOption)
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? globalOption
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: false;
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const match = info.match(WHITESPACE_REGEXP);
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if (match) {
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if (AVAILABLE_WHITESPACE_POSITIONS.includes(match[1])) {
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return match[1];
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}
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return defaultPosition || 'all';
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}
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return defaultPosition;
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};
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