1 files changed, 14 insertions, 0 deletions
diff --git a/src/Document.cxx b/src/Document.cxx
index b5ec9a275..24ddd04ce 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -51,6 +51,16 @@
 using namespace Scintilla;
 using namespace Scintilla::Internal;
 
+LexInterface::LexInterface(Document *pdoc_) noexcept : pdoc(pdoc_), performingStyle(false) {
+}
+
+LexInterface::~LexInterface() noexcept = default;
+
+void LexInterface::SetInstance(ILexer5 *instance_) {
+	instance.reset(instance_);
+	pdoc->LexerChanged();
+}
+
 void LexInterface::Colourise(Sci::Position start, Sci::Position end) {
 	if (pdoc && instance && !performingStyle) {
 		// Protect against reentrance, which may occur, for example, when
@@ -86,6 +96,10 @@ LineEndType LexInterface::LineEndTypesSupported() {
 	return LineEndType::Default;
 }
 
+bool LexInterface::UseContainerLexing() const noexcept {
+	return !instance;
+}
+
 ActionDuration::ActionDuration(double duration_, double minDuration_, double maxDuration_) noexcept :
 	duration(duration_), minDuration(minDuration_), maxDuration(maxDuration_) {
 }