Add error status SC_STATUS_OUTSIDE_DOCUMENT that is set when operations are

attempted on a position outside the document.
Positions are checked earlier to prevent actions partly succeeding.
This is implemented with a new exception type Failure which should be caught by
platform layer's API handling code to produce a more granular error status.

1 files changed, 2 insertions, 0 deletions

diff --git a/qt/ScintillaEditBase/ScintillaQt.cpp b/qt/ScintillaEditBase/ScintillaQt.cpp
index d5e6eb7b0..5e9d262a4 100644
--- a/qt/ScintillaEditBase/ScintillaQt.cpp
+++ b/qt/ScintillaEditBase/ScintillaQt.cpp
@@ -768,6 +768,8 @@ sptr_t ScintillaQt::WndProc(Message iMessage, uptr_t wParam, sptr_t lParam)
 		}
 	} catch (std::bad_alloc &) {
 		errorStatus = Status::BadAlloc;
+	} catch (Failure &failure) {
+		errorStatus = failure.status;
 	} catch (...) {
 		errorStatus = Status::Failure;
 	}