Add package json_field_editor

packages/json_field_editor/lib/src/json_highlight/highlight_strategy.dart

@@ -0,0 +1,71 @@
+import 'package:flutter/material.dart';
+
+abstract class HighlightStrategy {
+  final TextStyle? textStyle;
+
+  HighlightStrategy({required this.textStyle});
+
+  bool match(String word);
+
+  TextSpan textSpan(String word);
+}
+
+class KeyHighlightStrategy extends HighlightStrategy {
+  KeyHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'\".*?\"\s*:').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}
+
+class StringHighlightStrategy extends HighlightStrategy {
+  StringHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'\".*?\"').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}
+
+class NumberHighlightStrategy extends HighlightStrategy {
+  NumberHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'\s*\b(\d+(\.\d+)?)\b').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}
+
+class BoolHighlightStrategy extends HighlightStrategy {
+  BoolHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'\b(true|false)\b').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}
+
+class NullHighlightStrategy extends HighlightStrategy {
+  NullHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'\bnull\b').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}
+
+class SpecialCharHighlightStrategy extends HighlightStrategy {
+  SpecialCharHighlightStrategy({required super.textStyle});
+
+  @override
+  bool match(String word) => RegExp(r'[{}\[\],:]').hasMatch(word);
+
+  @override
+  TextSpan textSpan(String word) => TextSpan(text: word, style: textStyle);
+}

packages/json_field_editor/lib/src/json_highlight/json_highlight.dart

@@ -0,0 +1,79 @@
+import 'package:extended_text_field/extended_text_field.dart';
+import 'package:flutter/material.dart';
+import 'package:json_field_editor/src/json_highlight/highlight_strategy.dart';
+
+class JsonHighlight extends SpecialTextSpanBuilder {
+  final TextStyle? keyHighlightStyle;
+  final TextStyle? stringHighlightStyle;
+  final TextStyle? numberHighlightStyle;
+  final TextStyle? boolHighlightStyle;
+  final TextStyle? nullHighlightStyle;
+  final TextStyle? specialCharHighlightStyle;
+  final TextStyle? commonTextStyle;
+  final bool isFormating;
+
+  JsonHighlight({
+    this.keyHighlightStyle,
+    this.stringHighlightStyle,
+    this.numberHighlightStyle,
+    this.boolHighlightStyle,
+    this.nullHighlightStyle,
+    this.specialCharHighlightStyle,
+    this.commonTextStyle,
+    required this.isFormating,
+  });
+
+  @override
+  TextSpan build(
+    String data, {
+    TextStyle? textStyle,
+    SpecialTextGestureTapCallback? onTap,
+  }) {
+    List<HighlightStrategy> strategies = [
+      KeyHighlightStrategy(textStyle: keyHighlightStyle),
+      StringHighlightStrategy(textStyle: stringHighlightStyle),
+      NumberHighlightStrategy(textStyle: numberHighlightStyle),
+      BoolHighlightStrategy(textStyle: boolHighlightStyle),
+      NullHighlightStrategy(textStyle: nullHighlightStyle),
+      SpecialCharHighlightStrategy(textStyle: specialCharHighlightStyle),
+    ];
+
+    List<TextSpan> spans = [];
+
+    data.splitMapJoin(
+      RegExp(
+        r'\".*?\"\s*:|\".*?\"|\s*\b(\d+(\.\d+)?)\b|\b(true|false|null)\b|[{}\[\],]',
+      ),
+      onMatch: (m) {
+        String word = m.group(0)!;
+        if (isFormating) {
+          spans.add(
+            strategies
+                .firstWhere((element) => element.match(word))
+                .textSpan(word),
+          );
+
+          return '';
+        }
+        spans.add(TextSpan(text: word, style: commonTextStyle));
+        return '';
+      },
+      onNonMatch: (n) {
+        spans.add(TextSpan(text: n, style: commonTextStyle));
+        return '';
+      },
+    );
+
+    return TextSpan(children: spans);
+  }
+
+  @override
+  SpecialText? createSpecialText(
+    String flag, {
+    TextStyle? textStyle,
+    SpecialTextGestureTapCallback? onTap,
+    required int index,
+  }) {
+    throw UnimplementedError();
+  }
+}