SourceCode: 1. line location base api

bake

@@ -140,7 +140,7 @@ get() {     _run_all_package install; }
 build() {   _run_all_package build; }
 upgrade() { _run_all_package upgrade;}
 clean() {   _run_all_package clean; }
-tests() {   _run_all_package test; }
+test() {   _run_all_package test; }
 gen() {     _run_all_package gen; }
 ls(){
   for pkg in ${!_pkgs[*]} ; do

packages/you_note_dart/lib/src/content/source_code.dart

@@ -0,0 +1,105 @@
+
+import 'dart:io';
+
+import 'package:analyzer/dart/analysis/features.dart';
+import 'package:analyzer/dart/analysis/utilities.dart';
+import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/visitor.dart';
+
+class SourceCode {
+  final String content;
+  final CodeBlock? _build;
+
+  SourceCode._(this._build, this.content);
+
+  static SourceCode parseFile(String path) {
+    return SourceCode.parse(File(path).readAsStringSync());
+  }
+
+  static SourceCode parse(String content) {
+    var parseResult = parseString(content: content, featureSet: FeatureSet.latestLanguageVersion());
+    var unit = parseResult.unit;
+    _CodeVisitor visitor = _CodeVisitor(content);
+    unit.visitChildren(visitor);
+    return SourceCode._(visitor.build, content);
+  }
+
+  List<CodeBlock> get codesInBuild => _build == null
+      ? []
+      : _build._children.isEmpty
+      ? [_build]
+      : _build.children;
+
+  CodeBlock? findCellCode({required int line}) {
+    int offset = 0;
+    for (var MapEntry(key: i, value: lineContent) in content.split("\n").asMap().entries) {
+      if (i + 1 == line) {
+        break;
+      }
+      //  '+1' : '\n'
+      offset += 1 + lineContent.length;
+    }
+
+    for (var code in codesInBuild) {
+      if (code.contains(offset)) {
+        return code;
+      }
+    }
+    return null;
+  }
+
+  line(int line) {
+    var lines = content.split("\n");
+    return lines[line - 1];
+  }
+}
+
+class CodeBlock {
+  final String content;
+  final int offset;
+  final int end;
+  final List<CodeBlock> _children = [];
+
+  CodeBlock({required this.offset, required this.end, required this.content});
+
+  int get length => end - offset;
+
+  List<CodeBlock> get children => List.unmodifiable(_children);
+
+  String get blockContent {
+    return content.substring(offset, end);
+  }
+
+  bool contains(int anOffset) {
+    return offset <= anOffset && anOffset <= end;
+  }
+
+  @override
+  String toString() {
+    return "$offset:$end";
+  }
+}
+
+class _CodeVisitor extends GeneralizingAstVisitor {
+  CodeBlock? build;
+  final String source;
+
+  _CodeVisitor(this.source);
+
+  @override
+  visitFunctionDeclaration(FunctionDeclaration node) {
+    if (node.name.lexeme == "build") {
+      var body = node.functionExpression.body as BlockFunctionBody;
+      var block = body.block;
+      build = CodeBlock(content: source, offset: block.leftBracket.end, end: block.rightBracket.offset);
+    }
+    return super.visitFunctionDeclaration(node);
+  }
+
+  @override
+  visitExpressionStatement(ExpressionStatement node) {
+    // FIXME go back
+    var expr = node.expression;
+    return super.visitExpressionStatement(node);
+  }
+}

packages/you_note_dart/lib/src/note_core.dart

@@ -366,7 +366,7 @@ class Pen {
     currentCell.print(object);
   }
 
-  /// 注意：只能在NotePage的[build]函数的最外层调用，不能放在button回调或Timer回调中
+  /// 注意：只能在NotePage的[_build]函数的最外层调用，不能放在button回调或Timer回调中
   /// 通过闭包记住currentCell的引用，以便可以在之后的回调中也可以print内容到currentCell
   @experimental
   @Deprecated("已经有更好的方案，这个废弃")

packages/you_note_dart/test/code_analyzer/code_block_test.dart

@@ -1,25 +1,19 @@
-import 'dart:io';
 
-import 'package:analyzer/dart/analysis/features.dart';
-import 'package:analyzer/dart/analysis/utilities.dart';
-import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/dart/ast/visitor.dart';
+import 'package:checks/checks.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:you_note_dart/src/content/source_code.dart';
 
 void main() {
   group("code analyzer", () {
-    test("block", () async {//packages/you_note_dart/lib/src/note_core.dart
-      File file=File.fromUri(Uri.file("test/code_analyzer/use_case_basic.dart"));
-      var parseResult = parseString(content: file.readAsStringSync(), featureSet: FeatureSet.latestLanguageVersion());
-      var unit = parseResult.unit;
-      unit.visitChildren(CodeVisitor());
+    test("block", () async {
+      SourceCode code = SourceCode.parseFile("test/code_analyzer/use_case_basic.dart");
+      check(code.line(8)).equals(r'  print("x:$x");');
+      check(code.findCellCode(line: 8)!.blockContent).equals(r"""
+
+  // begin comment 中文字符
+  print("x:$x");
+  // end comment 中文字符
+""");
     });
   });
 }
-
-class CodeVisitor extends GeneralizingAstVisitor{
-  @override
-  visitFunctionDeclaration(FunctionDeclaration node) {
-    return super.visitFunctionDeclaration(node);
-  }
- }

packages/you_note_dart/test/code_analyzer/use_case_basic.dart

@@ -1,9 +1,12 @@
 import 'package:flutter/widgets.dart';
+import 'package:you_note_dart/src/note_core.dart';
 
 var x = "x";
 
-void build(BuildContext context) {
-  debugPrint("x:$x");
+void build(BuildContext context, Pen print) {
+  // begin comment 中文字符
+  print("x:$x");
+  // end comment 中文字符
 }
 
 class A {}