From b1904cd946ddef2e94e93946c2bc10bcd3b0cb71 Mon Sep 17 00:00:00 2001 From: Stefan Monnier Date: Sat, 30 Sep 2000 17:00:32 +0000 Subject: [PATCH] (keymap_memberp): New function. (Fset_keymap_parent): Use it. (fix_submap_inheritance): Use get_keyelt, get_keymap_1 and KEYMAPP. Use keymap_memberp to avoid creating cycles. (access_keymap): Use KEYMAPP. --- src/ChangeLog | 8 ++++++ src/keymap.c | 69 ++++++++++++++++----------------------------------- 2 files changed, 30 insertions(+), 47 deletions(-) diff --git a/src/ChangeLog b/src/ChangeLog index b3f37d6a557..1b68592eced 100644 --- a/src/ChangeLog +++ b/src/ChangeLog @@ -1,3 +1,11 @@ +2000-09-30 Stefan Monnier + + * keymap.c (keymap_memberp): New function. + (Fset_keymap_parent): Use it. + (fix_submap_inheritance): Use get_keyelt, get_keymap_1 and KEYMAPP. + Use keymap_memberp to avoid creating cycles. + (access_keymap): Use KEYMAPP. + 2000-09-30 Gerd Moellmann * process.c (Fopen_network_stream) [HAVE_GETADDRINFO]: Use diff --git a/src/keymap.c b/src/keymap.c index 7bb7b0d7f6c..a9b659804cd 100644 --- a/src/keymap.c +++ b/src/keymap.c @@ -306,6 +306,16 @@ DEFUN ("keymap-parent", Fkeymap_parent, Skeymap_parent, 1, 1, 0, } +/* Check whether MAP is one of MAPS parents. */ +int +keymap_memberp (map, maps) + Lisp_Object map, maps; +{ + while (KEYMAPP (maps) && !EQ (map, maps)) + maps = Fkeymap_parent (maps); + return (EQ (map, maps)); +} + /* Set the parent keymap of MAP to PARENT. */ DEFUN ("set-keymap-parent", Fset_keymap_parent, Sset_keymap_parent, 2, 2, 0, @@ -323,15 +333,10 @@ PARENT should be nil or another keymap.") if (!NILP (parent)) { - Lisp_Object k; - parent = get_keymap_1 (parent, 1, 1); /* Check for cycles. */ - k = parent; - while (KEYMAPP (k) && !EQ (keymap, k)) - k = Fkeymap_parent (k); - if (EQ (keymap, k)) + if (keymap_memberp (keymap, parent)) error ("Cyclic keymap inheritance"); } @@ -400,51 +405,21 @@ fix_submap_inheritance (map, event, submap) /* SUBMAP is a cons that we found as a key binding. Discard the other things found in a menu key binding. */ - if (CONSP (submap)) - { - /* May be an old format menu item */ - if (STRINGP (XCAR (submap))) - { - submap = XCDR (submap); - /* Also remove a menu help string, if any, - following the menu item name. */ - if (CONSP (submap) && STRINGP (XCAR (submap))) - submap = XCDR (submap); - /* Also remove the sublist that caches key equivalences, if any. */ - if (CONSP (submap) - && CONSP (XCAR (submap))) - { - Lisp_Object carcar; - carcar = XCAR (XCAR (submap)); - if (NILP (carcar) || VECTORP (carcar)) - submap = XCDR (submap); - } - } - - /* Or a new format menu item */ - else if (EQ (XCAR (submap), Qmenu_item) - && CONSP (XCDR (submap))) - { - submap = XCDR (XCDR (submap)); - if (CONSP (submap)) - submap = XCAR (submap); - } - } + submap = get_keymap_1 (get_keyelt (submap, 0), 0, 0); /* If it isn't a keymap now, there's no work to do. */ - if (! CONSP (submap) - || ! EQ (XCAR (submap), Qkeymap)) + if (NILP (submap)) return; map_parent = Fkeymap_parent (map); if (! NILP (map_parent)) - parent_entry = access_keymap (map_parent, event, 0, 0); + parent_entry = get_keyelt (access_keymap (map_parent, event, 0, 0), 0); else parent_entry = Qnil; /* If MAP's parent has something other than a keymap, our own submap shadows it completely, so use nil as SUBMAP's parent. */ - if (! (CONSP (parent_entry) && EQ (XCAR (parent_entry), Qkeymap))) + if (! KEYMAPP (parent_entry)) parent_entry = Qnil; if (! EQ (parent_entry, submap)) @@ -455,10 +430,10 @@ fix_submap_inheritance (map, event, submap) { Lisp_Object tem; tem = Fkeymap_parent (submap_parent); - if (EQ (tem, parent_entry)) + if (keymap_memberp (tem, parent_entry)) + /* Fset_keymap_parent could create a cycle. */ return; - if (CONSP (tem) - && EQ (XCAR (tem), Qkeymap)) + if (KEYMAPP (tem)) submap_parent = tem; else break; @@ -525,7 +500,7 @@ access_keymap (map, idx, t_ok, noinherit) if (EQ (XCAR (binding), idx)) { val = XCDR (binding); - if (noprefix && CONSP (val) && EQ (XCAR (val), Qkeymap)) + if (noprefix && KEYMAPP (val)) return Qnil; if (CONSP (val)) fix_submap_inheritance (map, idx, val); @@ -539,7 +514,7 @@ access_keymap (map, idx, t_ok, noinherit) if (NATNUMP (idx) && XFASTINT (idx) < XVECTOR (binding)->size) { val = XVECTOR (binding)->contents[XFASTINT (idx)]; - if (noprefix && CONSP (val) && EQ (XCAR (val), Qkeymap)) + if (noprefix && KEYMAPP (val)) return Qnil; if (CONSP (val)) fix_submap_inheritance (map, idx, val); @@ -557,7 +532,7 @@ access_keymap (map, idx, t_ok, noinherit) | CHAR_SHIFT | CHAR_CTL | CHAR_META))) { val = Faref (binding, idx); - if (noprefix && CONSP (val) && EQ (XCAR (val), Qkeymap)) + if (noprefix && KEYMAPP (val)) return Qnil; if (CONSP (val)) fix_submap_inheritance (map, idx, val); @@ -782,7 +757,7 @@ store_in_keymap (keymap, idx, def) XCDR (insertion_point) = Fcons (Fcons (idx, def), XCDR (insertion_point)); } - + return def; } -- 2.39.2