c/kbind.c (raw)
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#include "focus.h" #include "openbox.h" #include "hooks.h" #include "kbind.h" #include <glib.h> #ifdef HAVE_STRING_H # include <string.h> #endif typedef struct KeyBindingTree { guint state; guint key; GList *keylist; /* the next binding in the tree at the same level */ struct KeyBindingTree *next_sibling; /* the first child of this binding (next binding in a chained sequence).*/ struct KeyBindingTree *first_child; } KeyBindingTree; static KeyBindingTree *firstnode, *curpos; static guint reset_key, reset_state; static gboolean grabbed, user_grabbed; guint kbind_translate_modifier(char *str) { if (!strcmp("Mod1", str)) return Mod1Mask; else if (!strcmp("Mod2", str)) return Mod2Mask; else if (!strcmp("Mod3", str)) return Mod3Mask; else if (!strcmp("Mod4", str)) return Mod4Mask; else if (!strcmp("Mod5", str)) return Mod5Mask; else if (!strcmp("C", str)) return ControlMask; else if (!strcmp("S", str)) return ShiftMask; g_warning("Invalid modifier '%s' in binding.", str); return 0; } static gboolean translate(char *str, guint *state, guint *keycode) { char **parsed; char *l; int i; gboolean ret = FALSE; KeySym sym; parsed = g_strsplit(str, "-", -1); /* first, find the key (last token) */ l = NULL; for (i = 0; parsed[i] != NULL; ++i) l = parsed[i]; if (l == NULL) goto translation_fail; /* figure out the mod mask */ *state = 0; for (i = 0; parsed[i] != l; ++i) { guint m = kbind_translate_modifier(parsed[i]); if (!m) goto translation_fail; *state |= m; } /* figure out the keycode */ sym = XStringToKeysym(l); if (sym == NoSymbol) { g_warning("Invalid key name '%s' in key binding.", l); goto translation_fail; } *keycode = XKeysymToKeycode(ob_display, sym); if (!keycode) { g_warning("Key '%s' does not exist on the display.", l); goto translation_fail; } ret = TRUE; translation_fail: g_strfreev(parsed); return ret; } static void destroytree(KeyBindingTree *tree) { KeyBindingTree *c; while (tree) { destroytree(tree->next_sibling); c = tree->first_child; if (c == NULL) { GList *it; for (it = tree->keylist; it != NULL; it = it->next) g_free(it->data); g_list_free(tree->keylist); } g_free(tree); tree = c; } } static KeyBindingTree *buildtree(GList *keylist) { GList *it; KeyBindingTree *ret = NULL, *p; if (g_list_length(keylist) <= 0) return NULL; /* nothing in the list.. */ for (it = g_list_last(keylist); it != NULL; it = it->prev) { p = ret; ret = g_new(KeyBindingTree, 1); ret->next_sibling = NULL; if (p == NULL) { GList *it; /* this is the first built node, the bottom node of the tree */ ret->keylist = g_list_copy(keylist); /* shallow copy */ for (it = ret->keylist; it != NULL; it = it->next) /* deep copy */ it->data = g_strdup(it->data); } ret->first_child = p; if (!translate(it->data, &ret->state, &ret->key)) { destroytree(ret); return NULL; } } return ret; } static void assimilate(KeyBindingTree *node) { KeyBindingTree *a, *b, *tmp, *last; if (firstnode == NULL) { /* there are no nodes at this level yet */ firstnode = node; } else { a = firstnode; last = a; b = node; while (a) { last = a; if (!(a->state == b->state && a->key == b->key)) { a = a->next_sibling; } else { tmp = b; b = b->first_child; g_free(tmp); a = a->first_child; } } if (!(last->state == b->state && last->key == a->key)) last->next_sibling = b; else { last->first_child = b->first_child; g_free(b); } } } KeyBindingTree *find(KeyBindingTree *search, gboolean *conflict) { KeyBindingTree *a, *b; *conflict = FALSE; a = firstnode; b = search; while (a && b) { if (!(a->state == b->state && a->key == b->key)) { a = a->next_sibling; } else { if ((a->first_child == NULL) == (b->first_child == NULL)) { if (a->first_child == NULL) { /* found it! (return the actual node, not the search's) */ return a; } } else { *conflict = TRUE; return NULL; /* the chain status' don't match (conflict!) */ } b = b->first_child; a = a->first_child; } } return NULL; // it just isn't in here } static void grab_keys(gboolean grab) { if (!grab) { XUngrabKey(ob_display, AnyKey, AnyModifier, ob_root); } else { KeyBindingTree *p = firstnode; while (p) { XGrabKey(ob_display, p->key, p->state, ob_root, FALSE, GrabModeAsync, GrabModeSync); p = p->next_sibling; } } } void reset_chains() { /* XXX kill timer */ curpos = NULL; if (grabbed) { grabbed = FALSE; g_message("reset chains. user: %d", user_grabbed); if (!user_grabbed) XUngrabKeyboard(ob_display, CurrentTime); } } void kbind_fire(guint state, guint key, gboolean press) { EventData *data; struct Client *c = focus_client; GQuark context = c != NULL ? g_quark_try_string("client") : g_quark_try_string("root"); if (user_grabbed) { data = eventdata_new_key(press ? Key_Press : Key_Release, context, c, state, key, NULL); g_assert(data != NULL); hooks_fire_keyboard(data); eventdata_free(data); } if (key == reset_key && state == reset_state) { reset_chains(); XAllowEvents(ob_display, AsyncKeyboard, CurrentTime); } else { KeyBindingTree *p; if (curpos == NULL) p = firstnode; else p = curpos->first_child; while (p) { if (p->key == key && p->state == state) { if (p->first_child != NULL) { /* part of a chain */ /* XXX TIMER */ if (!grabbed && !user_grabbed) { /*grab should never fail because we should have a sync grab at this point */ XGrabKeyboard(ob_display, ob_root, 0, GrabModeAsync, GrabModeSync, CurrentTime); } grabbed = TRUE; curpos = p; XAllowEvents(ob_display, AsyncKeyboard, CurrentTime); } else { data = eventdata_new_key(press ? Key_Press : Key_Release, context, c, state, key, p->keylist); g_assert(data != NULL); hooks_fire(data); eventdata_free(data); XAllowEvents(ob_display, AsyncKeyboard, CurrentTime); reset_chains(); } break; } p = p->next_sibling; } } } gboolean kbind_add(GList *keylist) { KeyBindingTree *tree, *t; gboolean conflict; if (!(tree = buildtree(keylist))) return FALSE; /* invalid binding requested */ t = find(tree, &conflict); if (conflict) { /* conflicts with another binding */ destroytree(tree); return FALSE; } if (t != NULL) { /* already bound to something */ destroytree(tree); } else { /* grab the server here to make sure no key pressed go missed */ XGrabServer(ob_display); XSync(ob_display, FALSE); grab_keys(FALSE); /* assimilate this built tree into the main tree */ assimilate(tree); // assimilation destroys/uses the tree grab_keys(TRUE); XUngrabServer(ob_display); XFlush(ob_display); } return TRUE; } void kbind_clearall() { grab_keys(FALSE); destroytree(firstnode); firstnode = NULL; grab_keys(TRUE); } void kbind_startup() { gboolean b; curpos = firstnode = NULL; grabbed = user_grabbed = FALSE; b = translate("C-G", &reset_state, &reset_key); g_assert(b); } void kbind_shutdown() { if (grabbed || user_grabbed) { grabbed = FALSE; kbind_grab_keyboard(FALSE); } grab_keys(FALSE); destroytree(firstnode); firstnode = NULL; } gboolean kbind_grab_keyboard(gboolean grab) { gboolean ret = TRUE; if (!grab) g_message("grab_keyboard(false). grabbed: %d", grabbed); user_grabbed = grab; if (!grabbed) { if (grab) ret = XGrabKeyboard(ob_display, ob_root, 0, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess; else XUngrabKeyboard(ob_display, CurrentTime); } return ret; } |