/* Shared helper for Object.getOwnPropertyNames() and Object.keys().
* Magic: 0=getOwnPropertyNames, 1=Object.keys.
*/
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_keys_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
#if defined(DUK_USE_ES6_PROXY)
duk_hobject *h_proxy_target;
duk_hobject *h_proxy_handler;
duk_hobject *h_trap_result;
duk_uarridx_t i, len, idx;
#endif
duk_small_uint_t enum_flags;
DUK_ASSERT_TOP(ctx, 1);
obj = duk_require_hobject_or_lfunc_coerce(ctx, 0);
DUK_ASSERT(obj != NULL);
DUK_UNREF(obj);
#if defined(DUK_USE_ES6_PROXY)
if (DUK_LIKELY(!duk_hobject_proxy_check(thr,
obj,
&h_proxy_target,
&h_proxy_handler))) {
goto skip_proxy;
}
duk_push_hobject(ctx, h_proxy_handler);
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_OWN_KEYS)) {
/* Careful with reachability here: don't pop 'obj' before pushing
* proxy target.
*/
DUK_DDD(DUK_DDDPRINT("no ownKeys trap, get keys of target instead"));
duk_pop_2(ctx);
duk_push_hobject(ctx, h_proxy_target);
duk_replace(ctx, 0);
DUK_ASSERT_TOP(ctx, 1);
goto skip_proxy;
}
/* [ obj handler trap ] */
duk_insert(ctx, -2);
duk_push_hobject(ctx, h_proxy_target); /* -> [ obj trap handler target ] */
duk_call_method(ctx, 1 /*nargs*/); /* -> [ obj trap_result ] */
h_trap_result = duk_require_hobject(ctx, -1);
DUK_UNREF(h_trap_result);
len = (duk_uarridx_t) duk_get_length(ctx, -1);
idx = 0;
duk_push_array(ctx);
for (i = 0; i < len; i++) {
/* [ obj trap_result res_arr ] */
if (duk_get_prop_index(ctx, -2, i) && duk_is_string(ctx, -1)) {
/* XXX: for Object.keys() we should check enumerability of key */
/* [ obj trap_result res_arr propname ] */
duk_put_prop_index(ctx, -2, idx);
idx++;
} else {
duk_pop(ctx);
}
}
/* XXX: for Object.keys() the [[OwnPropertyKeys]] result (trap result)
* should be filtered so that only enumerable keys remain. Enumerability
* should be checked with [[GetOwnProperty]] on the original object
* (i.e., the proxy in this case). If the proxy has a getOwnPropertyDescriptor
* trap, it should be triggered for every property. If the proxy doesn't have
* the trap, enumerability should be checked against the target object instead.
* We don't do any of this now, so Object.keys() and Object.getOwnPropertyNames()
* return the same result now for proxy traps. We still do clean up the trap
* result, so that Object.keys() and Object.getOwnPropertyNames() will return a
* clean array of strings without gaps.
*/
return 1;
skip_proxy:
#endif /* DUK_USE_ES6_PROXY */
DUK_ASSERT_TOP(ctx, 1);
if (duk_get_current_magic(ctx)) {
/* Object.keys */
enum_flags = DUK_ENUM_OWN_PROPERTIES_ONLY |
DUK_ENUM_NO_PROXY_BEHAVIOR;
} else {
/* Object.getOwnPropertyNames */
enum_flags = DUK_ENUM_INCLUDE_NONENUMERABLE |
DUK_ENUM_OWN_PROPERTIES_ONLY |
DUK_ENUM_NO_PROXY_BEHAVIOR;
}
return duk_hobject_get_enumerated_keys(ctx, enum_flags);
}
int duk_builtin_object_constructor_get_own_property_names(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 1);
(void) duk_require_hobject(ctx, 0);
return duk_hobject_get_enumerated_keys(ctx, DUK_ENUM_INCLUDE_NONENUMERABLE |
DUK_ENUM_OWN_PROPERTIES_ONLY);
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_keys_shared(duk_hthread *thr) {
duk_hobject *obj;
#if defined(DUK_USE_ES6_PROXY)
duk_hobject *h_proxy_target;
duk_hobject *h_proxy_handler;
duk_hobject *h_trap_result;
#endif
duk_small_uint_t enum_flags;
duk_int_t magic;
DUK_ASSERT_TOP(thr, 1);
magic = duk_get_current_magic(thr);
if (magic == 3) {
/* ES2015 Section 26.1.11 requires a TypeError for non-objects. Lightfuncs
* and plain buffers pretend to be objects, so accept those too.
*/
obj = duk_require_hobject_promote_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
} else {
/* ES2015: ToObject coerce. */
obj = duk_to_hobject(thr, 0);
}
DUK_ASSERT(obj != NULL);
DUK_UNREF(obj);
/* XXX: proxy chains */
#if defined(DUK_USE_ES6_PROXY)
/* XXX: better sharing of code between proxy target call sites */
if (DUK_LIKELY(!duk_hobject_proxy_check(obj,
&h_proxy_target,
&h_proxy_handler))) {
goto skip_proxy;
}
duk_push_hobject(thr, h_proxy_handler);
if (!duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_OWN_KEYS)) {
/* Careful with reachability here: don't pop 'obj' before pushing
* proxy target.
*/
DUK_DDD(DUK_DDDPRINT("no ownKeys trap, get keys of target instead"));
duk_pop_2(thr);
duk_push_hobject(thr, h_proxy_target);
duk_replace(thr, 0);
DUK_ASSERT_TOP(thr, 1);
goto skip_proxy;
}
/* [ obj handler trap ] */
duk_insert(thr, -2);
duk_push_hobject(thr, h_proxy_target); /* -> [ obj trap handler target ] */
duk_call_method(thr, 1 /*nargs*/); /* -> [ obj trap_result ] */
h_trap_result = duk_require_hobject(thr, -1);
DUK_UNREF(h_trap_result);
magic = duk_get_current_magic(thr);
DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t)));
enum_flags = duk__object_keys_enum_flags[magic];
duk_proxy_ownkeys_postprocess(thr, h_proxy_target, enum_flags);
return 1;
skip_proxy:
#endif /* DUK_USE_ES6_PROXY */
DUK_ASSERT_TOP(thr, 1);
magic = duk_get_current_magic(thr);
DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t)));
enum_flags = duk__object_keys_enum_flags[magic];
return duk_hobject_get_enumerated_keys(thr, enum_flags);
}
int duk_builtin_object_constructor_keys(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 1);
(void) duk_require_hobject(ctx, 0);
return duk_hobject_get_enumerated_keys(ctx, DUK_ENUM_OWN_PROPERTIES_ONLY);
}
