don't let form text input insert ^I, ^J, ^L, ^M

In bug #1110, Alexander pointed out that it grabs ^L instead of letting it
trigger focusing of the location bar.

I note that the html5 draft currently insists that ^J and ^M not be permitted
to find their way into the control's value. I imagine they could still be
pasted in, but *shrugs*.

1 files changed, 4 insertions, 0 deletions

diff --git a/dw/fltkui.cc b/dw/fltkui.cc
index 4c3415c7..a43edf15 100644
--- a/dw/fltkui.cc
+++ b/dw/fltkui.cc
@@ -70,6 +70,10 @@ int CustInput2::handle(int e)
       } else if (k == 'd') {
          cut(position(), position()+1);
          return 1;
+      } else if (k == 'i' || k == 'j' || k == 'l' || k == 'm') {
+         // Fl_Input wants to "insert a few selected control characters
+         // literally", but this gets in the way of key commands.
+         return 0;
       }
    }
    return Fl_Input::handle(e);