1 files changed, 24 insertions, 0 deletions

diff --git a/subprojects/frontend/src/editor/semanticHighlighting.ts b/subprojects/frontend/src/editor/semanticHighlighting.ts
new file mode 100644
index 00000000..2aed421b
--- /dev/null
+++ b/subprojects/frontend/src/editor/semanticHighlighting.ts
@@ -0,0 +1,24 @@
+import { RangeSet } from '@codemirror/rangeset';
+import type { TransactionSpec } from '@codemirror/state';
+import { Decoration } from '@codemirror/view';
+
+import { decorationSetExtension } from './decorationSetExtension';
+
+export interface IHighlightRange {
+  from: number;
+
+  to: number;
+
+  classes: string[];
+}
+
+const [setSemanticHighlightingInternal, semanticHighlighting] = decorationSetExtension();
+
+export function setSemanticHighlighting(ranges: IHighlightRange[]): TransactionSpec {
+  const rangeSet = RangeSet.of(ranges.map(({ from, to, classes }) => Decoration.mark({
+    class: classes.map((c) => `cmt-problem-${c}`).join(' '),
+  }).range(from, to)), true);
+  return setSemanticHighlightingInternal(rangeSet);
+}
+
+export { semanticHighlighting };