Redo handling of temporary messages.

Any number of temporary messages can now be printed by first
setting a flag with msgwin_set_temporary(true). These messages
may then be cleared from both history and message window by
calling msgwin_clear_temporary. Calling
msgwin_set_temporary(false) will make previously temporary
messages permannet.

1 files changed, 7 insertions, 0 deletions

diff --git a/crawl-ref/source/message.h b/crawl-ref/source/message.h
index 45afe778b5..ac3249c1dc 100644
--- a/crawl-ref/source/message.h
+++ b/crawl-ref/source/message.h
@@ -45,6 +45,13 @@ void mpr_comma_separated_list(const std::string prefix,
 
 class input_history;
 
+// Sets whether messages that are printed through mpr are
+// considered temporary.
+void msgwin_set_temporary(bool temp);
+// Clear the last set of temporary messages from both
+// message window and history.
+void msgwin_clear_temporary();
+
 void msgwin_prompt(std::string prompt);
 void msgwin_reply(std::string reply);