✨ feat(vscode): 代码阅读的解析与模板直译核心

vscode/src/codeReader/editText.test.ts

@@ -0,0 +1,46 @@
+import { describe, expect, it } from 'vitest'
+import { toBlockViews } from './blockView'
+import { commonIndent, reindentBlock, replaceLines } from './editText'
+import { createTypeScriptAdapter } from './languages/typescript'
+import { readFixture, WASM_DIR, withBlocks } from './testSupport'
+
+describe('行替换', () => {
+  it('多行块替换后每个非空行补回原来的缩进，空行保持空', () => {
+    const source = [
+      'function f() {',
+      '    if (a)',
+      '        return 1',
+      '}',
+    ].join('\n')
+    const edited = replaceLines(source, 1, 2, 'if (a && b) {\n\n  return 2\n}')
+    expect(edited).toBe([
+      'function f() {',
+      '    if (a && b) {',
+      '',
+      '      return 2',
+      '    }',
+      '}',
+    ].join('\n'))
+  })
+
+  it('保留 \\r\\n 换行', () => {
+    expect(replaceLines('a\r\n  b\r\n  c\r\n', 1, 1, 'x\ny')).toBe('a\r\n  x\r\n  y\r\n  c\r\n')
+  })
+
+  it('共同缩进逐字符比，混用制表符和空格时只取相同的前缀', () => {
+    expect(commonIndent(['\t  a', '', '\t    b'])).toBe('\t  ')
+    expect(commonIndent(['\ta', '  b'])).toBe('')
+    expect(reindentBlock(['    x'], 'a\n  b')).toBe('    a\n      b')
+  })
+
+  it('把预览里的 code 原样写回，文件不变（去缩进与补缩进互逆）', async () => {
+    const adapter = createTypeScriptAdapter(WASM_DIR)
+    const source = readFixture('envLock.ts.txt')
+    const views = await withBlocks(adapter, 'typescript', source, blocks => toBlockViews(blocks, source, adapter, undefined))
+    const all = views.flatMap(function flat(view): typeof views {
+      return [view, ...view.children.flatMap(flat)]
+    })
+    for (const view of all)
+      expect(replaceLines(source, view.startLine, view.endLine, view.code), view.id).toBe(source)
+  })
+})