diff --git a/Libraries/LibGUI/GTextDocument.cpp b/Libraries/LibGUI/GTextDocument.cpp
index ce7f675ed3..a449fc8ea8 100644
--- a/Libraries/LibGUI/GTextDocument.cpp
+++ b/Libraries/LibGUI/GTextDocument.cpp
@@ -552,3 +552,10 @@ void GTextDocument::remove(const GTextRange& unnormalized_range)
 
     notify_did_change();
 }
+
+GTextRange GTextDocument::range_for_entire_line(size_t line_index) const
+{
+    if (line_index >= line_count())
+        return {};
+    return { { line_index, 0 }, { line_index, line(line_index).length() } };
+}
diff --git a/Libraries/LibGUI/GTextDocument.h b/Libraries/LibGUI/GTextDocument.h
index bbf24e1bec..aa4e666898 100644
--- a/Libraries/LibGUI/GTextDocument.h
+++ b/Libraries/LibGUI/GTextDocument.h
@@ -116,6 +116,8 @@ public:
 
     char character_at(const GTextPosition&) const;
 
+    GTextRange range_for_entire_line(size_t line_index) const;
+
     Optional<GTextDocumentSpan> first_non_skippable_span_before(const GTextPosition&) const;
     Optional<GTextDocumentSpan> first_non_skippable_span_after(const GTextPosition&) const;