Control-V/Z

* disabled Control-Z use in Tx panel.
  * added Tx text capture to clipboard when ESC pressed
    - allows subsequent Control-V paste of text back to
      the Tx panel

src/dialogs/fl_digi.cxx

@@ -2548,9 +2548,9 @@ int default_handler(int event)
 	}
 
 	Fl_Widget* w = Fl::focus();
+	int key = Fl::event_key();
 
 	if (w == fl_digi_main || w->window() == fl_digi_main) {
-		int key = Fl::event_key();
 		if (key == FL_Escape || (key >= FL_F && key <= FL_F_Last) ||
 			((key == '1' || key == '2' || key == '3' || key == '4') && Fl::event_alt())) {
 			TransmitText->take_focus();
@@ -2582,9 +2582,13 @@ int default_handler(int event)
 	else if (w == dlgLogbook || w->window() == dlgLogbook)
 		return log_search_handler(event);
 
-	else if (Fl::event_key() == FL_Escape)
+	else if ((Fl::event_key() == FL_Escape) ||
+			(Fl::event_ctrl() && ((key == 'z' || key == 'Z')) &&
+			TransmitText->visible_focus()))
 		return 1;
 
+	else if (Fl::event_ctrl()) return w->handle(FL_KEYBOARD);
+
 	return 0;
 }
 

src/widgets/FTextRXTX.cxx

@@ -1079,6 +1079,8 @@ int FTextTX::handle_key(int key)
 	}
 
 		if (trx_state == STATE_TX && active_modem->get_stopflag() == false) {
+			kf_select_all(0, this);
+			kf_copy(0, this);
 			clear();
 			if (arq_text_available)
 				AbortARQ();

src/widgets/Fl_Text_Buffer_mod_1_3.cxx

@@ -338,10 +338,10 @@ void Fl_Text_Buffer_mod::replace(int start, int end, const char *text)
     return;
   if (start < 0)
     start = 0;
-  if (end < 0) // needed to prevent control-Z crash
-    end = 0;
   if (end > mLength)
     end = mLength;
+  if (end < start)
+    end = start;
 
   IS_UTF8_ALIGNED2(this, (start))
   IS_UTF8_ALIGNED2(this, (end))
@@ -349,8 +349,7 @@ void Fl_Text_Buffer_mod::replace(int start, int end, const char *text)
   
   call_predelete_callbacks(start, end - start);
   const char *deletedText = text_range(start, end);
-  if (end > start)
-    remove_(start, end);
+  remove_(start, end);
   int nInserted = insert_(start, text);
   mCursorPosHint = start + nInserted;
   call_modify_callbacks(start, end - start, nInserted, 0, deletedText);