Implement detach point access with SCI_SETUNDODETACH and SCI_GETUNDODETACH.

Write more documentation for undo history.

1 files changed, 12 insertions, 4 deletions

diff --git a/src/CellBuffer.cxx b/src/CellBuffer.cxx
index 691a811dd..6dde7eb84 100644
--- a/src/CellBuffer.cxx
+++ b/src/CellBuffer.cxx
@@ -1160,12 +1160,12 @@ int CellBuffer::UndoSavePoint() const noexcept {
 	return uh->SavePoint();
 }
 
-void CellBuffer::SetUndoCurrent(int action) {
-	uh->SetCurrent(action, Length());
+void CellBuffer::SetUndoDetach(int action) noexcept {
+	uh->SetDetachPoint(action);
 }
 
-int CellBuffer::UndoCurrent() const noexcept {
-	return uh->Current();
+int CellBuffer::UndoDetach() const noexcept {
+	return uh->DetachPoint();
 }
 
 void CellBuffer::SetUndoTentative(int action) noexcept {
@@ -1176,6 +1176,14 @@ int CellBuffer::UndoTentative() const noexcept {
 	return uh->TentativePoint();
 }
 
+void CellBuffer::SetUndoCurrent(int action) {
+	uh->SetCurrent(action, Length());
+}
+
+int CellBuffer::UndoCurrent() const noexcept {
+	return uh->Current();
+}
+
 int CellBuffer::UndoActionType(int action) const noexcept {
 	return uh->Type(action);
 }