[LyX/master] #9875 disable the modifier check for LFUN_SELF_INSERT on Mac

[Stephan Witt]

commit 4fd4c31bb6615826c91ac20a478b36f32fe74d9c
Author: Stephan Witt <sw...@lyx.org>
Date:   Tue Dec 15 01:24:31 2015 +0100

    #9875 disable the modifier check for LFUN_SELF_INSERT on Mac

diff --git a/src/frontends/qt4/GuiApplication.cpp 
b/src/frontends/qt4/GuiApplication.cpp
index b760da8..4b6e769 100644
--- a/src/frontends/qt4/GuiApplication.cpp
+++ b/src/frontends/qt4/GuiApplication.cpp
@@ -2164,6 +2164,11 @@ void GuiApplication::processKeySym(KeySymbol const & 
keysym, KeyModifier state)
                                        current_view_->restartCursor();
                                return;
                        }
+                       // The following modifier check is not needed on Mac.
+                       // The keysym is either not text or it is different
+                       // from the non-modifier keysym. See #9875 for the
+                       // broken alt-modifier effect of having this code 
active.
+#if !defined(Q_OS_MAC)
                        // If a non-Shift Modifier is used we have a non-bound 
key sequence
                        // (such as Alt+j = j). This should be omitted (#5575).
                        // On Windows, AltModifier and ControlModifier are both
@@ -2182,6 +2187,7 @@ void GuiApplication::processKeySym(KeySymbol const & 
keysym, KeyModifier state)
                                }
                                return;
                        }
+#endif
                        // Since all checks above were passed, we now really 
have text that
                        // is to be inserted (e.g., AltGr-bound symbols). Thus 
change the
                        // func to LFUN_SELF_INSERT and thus cause the text to 
be inserted