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Expose the NO_EFFECT/UNUSED distinction through midend_process_key()

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This removed the "handled" pointer and instead extends the existing
boolean return value (quit or don't quit) into an enumeration.  One of
the values still quits the program, but now there are different values
for keys that had an effect, had no effect, and are not used by the
puzzle at all.  The mapping from interpret_move results to process_key
results is roughly:

move string    -> PKR_SOME_EFFECT
MOVE_UI_UPDATE -> PKR_SOME_EFFECT
MOVE_NO_EFFECT -> PKR_NO_EFFECT
MOVE_UNUSED    -> PKR_UNUSED

The mid-end can also generate results internally, and is the only place
that PKR_QUIT can arise.

For compatibility, PKR_QUIT is zero, so anything expecting a false
return value to mean quit will be unsurprised.  The other values are
ordered so that lower values indicate a greater amount of handling of
the key.
This commit is contained in:
Ben Harris
2023-06-07 23:03:30 +01:00
parent 87e98e6715
commit 1547154efb
8 changed files with 97 additions and 71 deletions
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puzzles.h
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@ -320,7 +320,8 @@ void midend_reset_tilesize(midend *me);
void midend_new_game(midend *me);
void midend_restart_game(midend *me);
void midend_stop_anim(midend *me);
bool midend_process_key(midend *me, int x, int y, int button, bool *handled);
enum { PKR_QUIT = 0, PKR_SOME_EFFECT, PKR_NO_EFFECT, PKR_UNUSED };
int midend_process_key(midend *me, int x, int y, int button);
key_label *midend_request_keys(midend *me, int *nkeys);
const char *midend_current_key_label(midend *me, int button);
void midend_force_redraw(midend *me);