Function processRules

packages/compiler/src/shadow_css.ts:1043–1061

(input: string, ruleCallback: (rule: CssRule) => CssRule)

}

export function processRules(input: string, ruleCallback: (rule: CssRule) => CssRule): string {
  const escaped = escapeInStrings(input);
  const inputWithEscapedBlocks = escapeBlocks(escaped, CONTENT_PAIRS, BLOCK_PLACEHOLDER);
  let nextBlockIndex = 0;
  const escapedResult = inputWithEscapedBlocks.escapedString.replace(_ruleRe, (...m: string[]) => {
    const selector = m[2];
    let content = '';
    let suffix = m[4];
    let contentPrefix = '';
    if (suffix && suffix.startsWith('{' + BLOCK_PLACEHOLDER)) {
      content = inputWithEscapedBlocks.blocks[nextBlockIndex++];
      suffix = suffix.substring(BLOCK_PLACEHOLDER.length + 1);
      contentPrefix = '{';
    }
    const rule = ruleCallback(new CssRule(selector, content));
    return `${m[1]}${rule.selector}${m[3]}${contentPrefix}${rule.content}${suffix}`;
  });
  return unescapeInStrings(escapedResult);
}

class StringWithEscapedBlocks {
  constructor(