New infrastructure feature. Games are now permitted to be

_conditionally_ able to format the current puzzle as text to be sent
to the clipboard. For instance, if a game were to support playing on
a square grid and on other kinds of grid such as hexagonal, then it
might reasonably feel that only the former could be sensibly
rendered in ASCII art; so it can now arrange for the "Copy" menu
item to be greyed out depending on the game_params.

To do this I've introduced a new backend function
(can_format_as_text_now()), and renamed the existing static backend
field "can_format_as_text" to "can_format_as_text_ever". The latter
will cause compile errors for anyone maintaining a third-party front
end; if any such person is reading this, I apologise to them for the
inconvenience, but I did do it deliberately so that they'd know to
update their front end.

As yet, no checked-in game actually uses this feature; all current
games can still either copy always or copy never.

[originally from svn r8161]

1 files changed, 2 insertions, 1 deletions

diff --git a/osx.m b/osx.m
index ec9b6f9..33031e3 100644
--- a/osx.m
+++ b/osx.m
@@ -806,7 +806,8 @@ struct frontend {
 - (BOOL)validateMenuItem:(NSMenuItem *)item
 {
     if ([item action] == @selector(copy:))
-	return (ourgame->can_format_as_text ? YES : NO);
+	return (ourgame->can_format_as_text_ever &&
+		midend_can_format_as_text_now(me) ? YES : NO);
     else if ([item action] == @selector(solveGame:))
 	return (ourgame->can_solve ? YES : NO);
     else