Only catch \iffalse at the beginning of a line

There may be optional spaces. Close James-Yu/LaTeX-Workshop#4231
jlelong · Apr 20, 2024 · 8624d0b · 8624d0b
1 parent f17f354
commit 8624d0b
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Showing 2 changed files with 16 additions and 16 deletions.
diff --git a/syntaxes/TeX.tmLanguage.json b/syntaxes/TeX.tmLanguage.json
@@ -2,22 +2,22 @@
     "name": "TeX",
     "patterns": [
         {
-            "begin": "(\\\\)iffalse",
+            "begin": "(?<=^\\s*)((\\\\)iffalse)",
             "beginCaptures": {
-                "0": {
+                "1": {
                     "name": "keyword.control.tex"
                 },
-                "1": {
+                "2": {
                     "name": "punctuation.definition.keyword.tex"
                 }
             },
             "contentName": "comment.line.percentage.tex",
-            "end": "(\\\\)(else|fi)",
+            "end": "(?<=^\\s*)((\\\\)(?:else|fi))",
             "endCaptures": {
-                "0": {
+                "1": {
                     "name": "keyword.control.tex"
                 },
-                "1": {
+                "2": {
                     "name": "punctuation.definition.keyword.tex"
                 }
             },
@@ -167,8 +167,8 @@
             ]
         },
         "conditionals": {
-            "begin": "\\\\(if[a-z]*)",
-            "end": "\\\\fi",
+            "begin": "(?<=^\\s*)\\\\if[a-z]*",
+            "end": "(?<=^\\s*)\\\\fi",
             "patterns": [
                 {
                     "include": "#comment"

diff --git a/syntaxes/src/TeX.tmLanguage.yaml b/syntaxes/src/TeX.tmLanguage.yaml
@@ -1,17 +1,17 @@
 name: TeX
 patterns:
-- begin: (\\)iffalse
+- begin: (?<=^\s*)((\\)iffalse)
   beginCaptures:
-    '0':
-      name: keyword.control.tex
     '1':
+      name: keyword.control.tex
+    '2':
       name: punctuation.definition.keyword.tex
   contentName: comment.line.percentage.tex
-  end: (\\)(else|fi)
+  end: (?<=^\s*)((\\)(?:else|fi))
   endCaptures:
-    '0':
-      name: keyword.control.tex
     '1':
+      name: keyword.control.tex
+    '2':
       name: punctuation.definition.keyword.tex
   patterns:
   - include: '#comment'
@@ -94,8 +94,8 @@ repository:
       end: $\n?
       name: comment.line.percentage.directive.tex
   conditionals:
-    begin: \\(if[a-z]*)
-    end: \\fi
+    begin: (?<=^\s*)\\if[a-z]*
+    end: (?<=^\s*)\\fi
     patterns:
     - include: '#comment'
     - include: '#conditionals'