103 lines
3.4 KiB
TypeScript
103 lines
3.4 KiB
TypeScript
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import React from 'react';
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interface CodeDiffProps {
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oldCode: string;
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newCode: string;
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fileName?: string;
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}
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export function CodeDiff({ oldCode, newCode, fileName }: CodeDiffProps) {
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// Split code into lines
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const oldLines = oldCode.split('\n');
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const newLines = newCode.split('\n');
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// Simple diff algorithm - find common prefix and suffix
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let start = 0;
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let oldEnd = oldLines.length - 1;
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let newEnd = newLines.length - 1;
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// Find common prefix
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while (start <= oldEnd && start <= newEnd && oldLines[start] === newLines[start]) {
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start++;
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}
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// Find common suffix
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while (oldEnd >= start && newEnd >= start && oldLines[oldEnd] === newLines[newEnd]) {
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oldEnd--;
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newEnd--;
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}
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// Build diff display
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const diffLines: Array<{ type: 'unchanged' | 'removed' | 'added'; content: string; lineNum?: number }> = [];
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// Add unchanged prefix
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for (let i = 0; i < start; i++) {
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diffLines.push({ type: 'unchanged', content: oldLines[i], lineNum: i + 1 });
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}
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// Add removed lines
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for (let i = start; i <= oldEnd; i++) {
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diffLines.push({ type: 'removed', content: oldLines[i] });
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}
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// Add added lines
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for (let i = start; i <= newEnd; i++) {
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diffLines.push({ type: 'added', content: newLines[i], lineNum: i + 1 });
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}
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// Add unchanged suffix
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for (let i = oldEnd + 1; i < oldLines.length; i++) {
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diffLines.push({ type: 'unchanged', content: oldLines[i], lineNum: i + 1 + (newEnd - oldEnd) });
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}
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return (
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<div className="rounded-lg border border-gray-700 bg-gray-900 overflow-hidden">
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{fileName && (
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<div className="px-4 py-2 bg-gray-800 border-b border-gray-700 text-sm text-gray-300">
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{fileName}
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</div>
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)}
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<div className="overflow-x-auto">
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<table className="w-full text-sm font-mono">
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<tbody>
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{diffLines.map((line, idx) => (
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<tr
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key={idx}
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className={
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line.type === 'removed' ? 'bg-red-900/20' :
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line.type === 'added' ? 'bg-green-900/20' :
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''
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}
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>
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<td className="px-2 py-0.5 text-right text-gray-500 select-none w-12">
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{line.type === 'removed' ? '-' : line.lineNum || ''}
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</td>
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<td className="px-2 py-0.5 text-right text-gray-500 select-none w-12">
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{line.type === 'added' ? '+' : line.type === 'unchanged' ? line.lineNum || '' : ''}
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</td>
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<td className="px-1 py-0.5 select-none w-6 text-center">
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<span className={
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line.type === 'removed' ? 'text-red-400' :
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line.type === 'added' ? 'text-green-400' :
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'text-gray-600'
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}>
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{line.type === 'removed' ? '-' : line.type === 'added' ? '+' : ' '}
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</span>
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</td>
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<td className="px-2 py-0.5 whitespace-pre overflow-x-auto">
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<span className={
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line.type === 'removed' ? 'text-red-300' :
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line.type === 'added' ? 'text-green-300' :
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'text-gray-300'
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}>
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{line.content}
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</span>
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</td>
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</tr>
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))}
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</tbody>
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</table>
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</div>
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</div>
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);
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}
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