Fix variable matching in twig grammar to ignore ${var} format (#330)

Co-authored-by: Claude <noreply@anthropic.com>

src-web/components/core/Editor/twig/twig.grammar

@@ -11,7 +11,7 @@
 }
 
 @tokens {
-  Text { ![$] Text? | "$" (@eof | ![{] Text?) }
+  Text { ![$] Text? | "$" (@eof | ![{] Text? | "{" ![[] Text?) }
 }
 
 @external propSource highlight from "./highlight"

src-web/components/core/Editor/twig/twig.terms.ts

@@ -1,7 +1,8 @@
 // This file was generated by lezer-generator. You probably shouldn't edit it.
-export const Template = 1,
+export const
+  Template = 1,
   Tag = 2,
   TagOpen = 3,
   TagContent = 4,
   TagClose = 5,
-  Text = 6;
+  Text = 6

src-web/components/core/Editor/twig/twig.test.ts

@@ -0,0 +1,106 @@
+import { describe, expect, test } from 'vitest';
+import { parser } from './twig';
+
+function getNodeNames(input: string): string[] {
+  const tree = parser.parse(input);
+  const nodes: string[] = [];
+  const cursor = tree.cursor();
+  do {
+    if (cursor.name !== 'Template') {
+      nodes.push(cursor.name);
+    }
+  } while (cursor.next());
+  return nodes;
+}
+
+function hasTag(input: string): boolean {
+  return getNodeNames(input).includes('Tag');
+}
+
+function hasError(input: string): boolean {
+  return getNodeNames(input).includes('⚠');
+}
+
+describe('twig grammar', () => {
+  describe('${[var]} format (valid template tags)', () => {
+    test('parses simple variable as Tag', () => {
+      expect(hasTag('${[var]}')).toBe(true);
+      expect(hasError('${[var]}')).toBe(false);
+    });
+
+    test('parses variable with whitespace as Tag', () => {
+      expect(hasTag('${[ var ]}')).toBe(true);
+      expect(hasError('${[ var ]}')).toBe(false);
+    });
+
+    test('parses embedded variable as Tag', () => {
+      expect(hasTag('hello ${[name]} world')).toBe(true);
+      expect(hasError('hello ${[name]} world')).toBe(false);
+    });
+
+    test('parses function call as Tag', () => {
+      expect(hasTag('${[fn()]}')).toBe(true);
+      expect(hasError('${[fn()]}')).toBe(false);
+    });
+  });
+
+  describe('${var} format (should be plain text, not tags)', () => {
+    test('parses ${var} as plain Text without errors', () => {
+      expect(hasTag('${var}')).toBe(false);
+      expect(hasError('${var}')).toBe(false);
+    });
+
+    test('parses embedded ${var} as plain Text', () => {
+      expect(hasTag('hello ${name} world')).toBe(false);
+      expect(hasError('hello ${name} world')).toBe(false);
+    });
+
+    test('parses JSON with ${var} as plain Text', () => {
+      const json = '{"key": "${value}"}';
+      expect(hasTag(json)).toBe(false);
+      expect(hasError(json)).toBe(false);
+    });
+
+    test('parses multiple ${var} as plain Text', () => {
+      expect(hasTag('${a} and ${b}')).toBe(false);
+      expect(hasError('${a} and ${b}')).toBe(false);
+    });
+  });
+
+  describe('mixed content', () => {
+    test('distinguishes ${var} from ${[var]} in same string', () => {
+      const input = '${plain} and ${[tag]}';
+      expect(hasTag(input)).toBe(true);
+      expect(hasError(input)).toBe(false);
+    });
+
+    test('parses JSON with ${[var]} as having Tag', () => {
+      const json = '{"key": "${[value]}"}';
+      expect(hasTag(json)).toBe(true);
+      expect(hasError(json)).toBe(false);
+    });
+  });
+
+  describe('edge cases', () => {
+    test('handles $ at end of string', () => {
+      expect(hasError('hello$')).toBe(false);
+      expect(hasTag('hello$')).toBe(false);
+    });
+
+    test('handles ${ at end of string without crash', () => {
+      // Incomplete syntax may produce errors, but should not crash
+      expect(() => parser.parse('hello${')).not.toThrow();
+    });
+
+    test('handles ${[ without closing without crash', () => {
+      // Unclosed tag may produce partial match, but should not crash
+      expect(() => parser.parse('${[unclosed')).not.toThrow();
+    });
+
+    test('handles empty ${[]}', () => {
+      // Empty tags may or may not be valid depending on grammar
+      // Just ensure no crash
+      expect(() => parser.parse('${[]}')).not.toThrow();
+    });
+  });
+});

src-web/components/core/Editor/twig/twig.ts

@@ -1,20 +1,18 @@
 // This file was generated by lezer-generator. You probably shouldn't edit it.
-import { LocalTokenGroup, LRParser } from '@lezer/lr';
-import { highlight } from './highlight';
+import {LRParser, LocalTokenGroup} from "@lezer/lr"
+import {highlight} from "./highlight"
 export const parser = LRParser.deserialize({
   version: 14,
-  states:
-    "!^QQOPOOOOOO'#C_'#C_OYOQO'#C^OOOO'#Cc'#CcQQOPOOOOOO'#Cd'#CdO_OQO,58xOOOO-E6a-E6aOOOO-E6b-E6bOOOO1G.d1G.d",
-  stateData: 'g~OUROYPO~OSTO~OSTOTXO~O',
-  goto: 'nXPPY^PPPbhTROSTQOSQSORVSQUQRWU',
-  nodeNames: '⚠ Template Tag TagOpen TagContent TagClose Text',
+  states: "!^QQOPOOOOOO'#C_'#C_OYOQO'#C^OOOO'#Cc'#CcQQOPOOOOOO'#Cd'#CdO_OQO,58xOOOO-E6a-E6aOOOO-E6b-E6bOOOO1G.d1G.d",
+  stateData: "g~OUROYPO~OSTO~OSTOTXO~O",
+  goto: "nXPPY^PPPbhTROSTQOSQSORVSQUQRWU",
+  nodeNames: "⚠ Template Tag TagOpen TagContent TagClose Text",
   maxTerm: 10,
   propSources: [highlight],
   skippedNodes: [0],
   repeatNodeCount: 2,
-  tokenData:
-    "#]~RTOtbtu!hu;'Sb;'S;=`!]<%lOb~gTU~Otbtuvu;'Sb;'S;=`!]<%lOb~yUO#ob#p;'Sb;'S;=`!]<%l~b~Ob~~!c~!`P;=`<%lb~!hOU~~!kVO#ob#o#p#Q#p;'Sb;'S;=`!]<%l~b~Ob~~!c~#TP!}#O#W~#]OY~",
-  tokenizers: [1, new LocalTokenGroup('b~RP#P#QU~XP#q#r[~aOT~~', 17, 4)],
-  topRules: { Template: [0, 1] },
-  tokenPrec: 0,
-});
+  tokenData: "#{~RTOtbtu!zu;'Sb;'S;=`!o<%lOb~gTU~Otbtuvu;'Sb;'S;=`!o<%lOb~yVO#ob#o#p!`#p;'Sb;'S;=`!o<%l~b~Ob~~!u~!cSO!}b#O;'Sb;'S;=`!o<%lOb~!rP;=`<%lb~!zOU~~!}VO#ob#o#p#d#p;'Sb;'S;=`!o<%l~b~Ob~~!u~#gTO!}b!}#O#v#O;'Sb;'S;=`!o<%lOb~#{OY~",
+  tokenizers: [1, new LocalTokenGroup("b~RP#P#QU~XP#q#r[~aOT~~", 17, 4)],
+  topRules: {"Template":[0,1]},
+  tokenPrec: 0
+})