mirror of https://github.com/yshui/picom.git
atom: add two-way mapping between atom and its name
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
parent
5a85219ce2
commit
74b5fd193a
50
src/atom.c
50
src/atom.c
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@ -1,4 +1,5 @@
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#include <string.h>
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#include <uthash.h>
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#include <xcb/xcb.h>
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#include "atom.h"
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@ -10,12 +11,14 @@
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struct atom_entry {
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struct cache_handle entry;
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UT_hash_handle hh;
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xcb_atom_t atom;
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};
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static inline int atom_getter(struct cache *cache attr_unused, const char *atom_name,
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static inline int atom_getter(struct cache *cache, const char *atom_name,
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struct cache_handle **value, void *user_data) {
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xcb_connection_t *c = user_data;
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auto atoms = container_of(cache, struct atom, c);
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xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(
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c, xcb_intern_atom(c, 0, to_u16_checked(strlen(atom_name)), atom_name), NULL);
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@ -31,13 +34,25 @@ static inline int atom_getter(struct cache *cache attr_unused, const char *atom_
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struct atom_entry *entry = ccalloc(1, struct atom_entry);
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entry->atom = atom;
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HASH_ADD_INT(atoms->atom_to_name, atom, entry);
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*value = &entry->entry;
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return 0;
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}
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static inline void
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atom_entry_free(struct cache *cache attr_unused, struct cache_handle *handle) {
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struct atom_entry *entry = cache_entry(handle, struct atom_entry, entry);
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static inline int
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known_atom_getter(struct cache *cache attr_unused, const char *atom_name attr_unused,
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struct cache_handle **value, void *user_data) {
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auto atom = *(xcb_atom_t *)user_data;
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struct atom_entry *entry = ccalloc(1, struct atom_entry);
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entry->atom = atom;
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*value = &entry->entry;
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return 0;
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}
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static inline void atom_entry_free(struct cache *cache, struct cache_handle *handle) {
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auto entry = cache_entry(handle, struct atom_entry, entry);
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auto atoms = container_of(cache, struct atom, c);
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HASH_DEL(atoms->atom_to_name, entry);
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free(entry);
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}
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@ -54,6 +69,33 @@ xcb_atom_t get_atom_cached(struct atom *a, const char *key) {
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return cache_entry(cache_get(&a->c, key), struct atom_entry, entry)->atom;
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}
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const char *get_atom_name(struct atom *a, xcb_atom_t atom, xcb_connection_t *c) {
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struct atom_entry *entry = NULL;
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HASH_FIND(hh, a->atom_to_name, &atom, sizeof(xcb_atom_t), entry);
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if (!entry) {
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auto r = xcb_get_atom_name_reply(c, xcb_get_atom_name(c, atom), NULL);
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if (!r) {
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log_error("Failed to get atom name");
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return NULL;
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}
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char *atom_name = xcb_get_atom_name_name(r);
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struct cache_handle *handle = NULL;
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cache_get_or_fetch(&a->c, atom_name, &handle, &atom, known_atom_getter);
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entry = cache_entry(handle, struct atom_entry, entry);
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}
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HASH_ADD_INT(a->atom_to_name, atom, entry);
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return entry->entry.key;
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}
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const char *get_atom_name_cached(struct atom *a, xcb_atom_t atom) {
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struct atom_entry *entry = NULL;
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HASH_FIND(hh, a->atom_to_name, &atom, sizeof(xcb_atom_t), entry);
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if (!entry) {
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return NULL;
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}
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return entry->entry.key;
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}
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/**
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* Create a new atom structure and fetch all predefined atoms
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*/
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@ -54,6 +54,7 @@
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struct atom_entry;
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struct atom {
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struct cache c;
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struct atom_entry *atom_to_name;
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LIST_APPLY(ATOM_DEF, SEP_COLON, ATOM_LIST1);
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LIST_APPLY(ATOM_DEF, SEP_COLON, ATOM_LIST2);
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};
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@ -64,5 +65,7 @@ struct atom *init_atoms(xcb_connection_t *c);
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xcb_atom_t get_atom(struct atom *a, const char *key, xcb_connection_t *c);
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xcb_atom_t get_atom_cached(struct atom *a, const char *key);
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const char *get_atom_name(struct atom *a, xcb_atom_t, xcb_connection_t *c);
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const char *get_atom_name_cached(struct atom *a, xcb_atom_t atom);
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void destroy_atoms(struct atom *a);
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