a27e3b8e43
Optimized the root .gitignore to exclude virtual environments, node modules, and temp folders to ensure clean and lightweight version tracking. Co-authored-by: Cursor <cursoragent@cursor.com>
63 lines
1.7 KiB
TypeScript
63 lines
1.7 KiB
TypeScript
/**
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* CSS 增量合并函数
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* 相同选择器：增加新属性，更新已有属性
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*/
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export function mergeCss(existingCss: string, newCss: string): string {
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const parseCss = (css: string): Map<string, Map<string, string>> => {
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const rules = new Map<string, Map<string, string>>();
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const ruleRegex = /([^{]+)\{([^}]+)\}/g;
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let match;
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while ((match = ruleRegex.exec(css)) !== null) {
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const selector = match[1].trim();
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const declarations = match[2].trim();
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if (!rules.has(selector)) {
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rules.set(selector, new Map());
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}
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const props = rules.get(selector)!;
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const propRegex = /([^:;]+):([^;]+)/g;
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let propMatch;
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while ((propMatch = propRegex.exec(declarations)) !== null) {
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const property = propMatch[1].trim();
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const value = propMatch[2].trim();
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props.set(property, value);
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}
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}
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return rules;
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};
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const serializeCss = (rules: Map<string, Map<string, string>>): string => {
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const lines: string[] = [];
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for (const [selector, props] of rules) {
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lines.push(`${selector} {`);
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for (const [property, value] of props) {
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lines.push(` ${property}: ${value};`);
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}
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lines.push('}\n');
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}
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return lines.join('\n');
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};
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const existingRules = parseCss(existingCss);
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const newRules = parseCss(newCss);
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for (const [selector, newProps] of newRules) {
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if (!existingRules.has(selector)) {
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existingRules.set(selector, newProps);
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} else {
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const existingProps = existingRules.get(selector)!;
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for (const [property, value] of newProps) {
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existingProps.set(property, value);
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}
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}
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}
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return serializeCss(existingRules);
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}
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