358 lines
13 KiB
C++
358 lines
13 KiB
C++
/*************************************************************************/
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/* javascript_singleton.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "api/javascript_singleton.h"
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#include "emscripten.h"
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extern "C" {
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extern void godot_js_os_download_buffer(const uint8_t *p_buf, int p_buf_size, const char *p_name, const char *p_mime);
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}
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#ifdef JAVASCRIPT_EVAL_ENABLED
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extern "C" {
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typedef union {
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int64_t i;
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double r;
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void *p;
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} godot_js_wrapper_ex;
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typedef int (*GodotJSWrapperVariant2JSCallback)(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock);
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typedef void (*GodotJSWrapperFreeLockCallback)(void **p_lock, int p_type);
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extern int godot_js_wrapper_interface_get(const char *p_name);
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extern int godot_js_wrapper_object_call(int p_id, const char *p_method, void **p_args, int p_argc, GodotJSWrapperVariant2JSCallback p_variant2js_callback, godot_js_wrapper_ex *p_cb_rval, void **p_lock, GodotJSWrapperFreeLockCallback p_lock_callback);
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extern int godot_js_wrapper_object_get(int p_id, godot_js_wrapper_ex *p_val, const char *p_prop);
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extern int godot_js_wrapper_object_getvar(int p_id, int p_type, godot_js_wrapper_ex *p_val);
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extern int godot_js_wrapper_object_setvar(int p_id, int p_key_type, godot_js_wrapper_ex *p_key_ex, int p_val_type, godot_js_wrapper_ex *p_val_ex);
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extern void godot_js_wrapper_object_set(int p_id, const char *p_name, int p_type, godot_js_wrapper_ex *p_val);
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extern void godot_js_wrapper_object_unref(int p_id);
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extern int godot_js_wrapper_create_cb(void *p_ref, void (*p_callback)(void *p_ref, int p_arg_id, int p_argc));
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extern void godot_js_wrapper_object_set_cb_ret(int p_type, godot_js_wrapper_ex *p_val);
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extern int godot_js_wrapper_create_object(const char *p_method, void **p_args, int p_argc, GodotJSWrapperVariant2JSCallback p_variant2js_callback, godot_js_wrapper_ex *p_cb_rval, void **p_lock, GodotJSWrapperFreeLockCallback p_lock_callback);
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};
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class JavaScriptObjectImpl : public JavaScriptObject {
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private:
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friend class JavaScript;
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int _js_id = 0;
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Callable _callable;
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static int _variant2js(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock);
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static void _free_lock(void **p_lock, int p_type);
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static Variant _js2variant(int p_type, godot_js_wrapper_ex *p_val);
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static void *_alloc_variants(int p_size);
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static void _callback(void *p_ref, int p_arg_id, int p_argc);
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protected:
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bool _set(const StringName &p_name, const Variant &p_value) override;
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bool _get(const StringName &p_name, Variant &r_ret) const override;
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void _get_property_list(List<PropertyInfo> *p_list) const override;
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public:
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Variant getvar(const Variant &p_key, bool *r_valid = nullptr) const override;
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void setvar(const Variant &p_key, const Variant &p_value, bool *r_valid = nullptr) override;
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Variant call(const StringName &p_method, const Variant **p_args, int p_argc, Callable::CallError &r_error) override;
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JavaScriptObjectImpl() {}
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JavaScriptObjectImpl(int p_id) { _js_id = p_id; }
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~JavaScriptObjectImpl() {
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if (_js_id) {
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godot_js_wrapper_object_unref(_js_id);
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}
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}
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};
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bool JavaScriptObjectImpl::_set(const StringName &p_name, const Variant &p_value) {
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ERR_FAIL_COND_V_MSG(!_js_id, false, "Invalid JS instance");
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const String name = p_name;
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godot_js_wrapper_ex exchange;
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void *lock = nullptr;
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const Variant *v = &p_value;
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int type = _variant2js((const void **)&v, 0, &exchange, &lock);
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godot_js_wrapper_object_set(_js_id, name.utf8().get_data(), type, &exchange);
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if (lock) {
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_free_lock(&lock, type);
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}
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return true;
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}
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bool JavaScriptObjectImpl::_get(const StringName &p_name, Variant &r_ret) const {
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ERR_FAIL_COND_V_MSG(!_js_id, false, "Invalid JS instance");
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const String name = p_name;
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godot_js_wrapper_ex exchange;
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int type = godot_js_wrapper_object_get(_js_id, &exchange, name.utf8().get_data());
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r_ret = _js2variant(type, &exchange);
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return true;
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}
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Variant JavaScriptObjectImpl::getvar(const Variant &p_key, bool *r_valid) const {
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if (r_valid) {
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*r_valid = false;
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}
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godot_js_wrapper_ex exchange;
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void *lock = nullptr;
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const Variant *v = &p_key;
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int prop_type = _variant2js((const void **)&v, 0, &exchange, &lock);
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int type = godot_js_wrapper_object_getvar(_js_id, prop_type, &exchange);
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if (lock) {
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_free_lock(&lock, prop_type);
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}
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if (type < 0) {
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return Variant();
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}
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if (r_valid) {
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*r_valid = true;
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}
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return _js2variant(type, &exchange);
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}
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void JavaScriptObjectImpl::setvar(const Variant &p_key, const Variant &p_value, bool *r_valid) {
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if (r_valid) {
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*r_valid = false;
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}
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godot_js_wrapper_ex kex, vex;
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void *klock = nullptr;
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void *vlock = nullptr;
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const Variant *kv = &p_key;
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const Variant *vv = &p_value;
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int ktype = _variant2js((const void **)&kv, 0, &kex, &klock);
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int vtype = _variant2js((const void **)&vv, 0, &vex, &vlock);
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int ret = godot_js_wrapper_object_setvar(_js_id, ktype, &kex, vtype, &vex);
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if (klock) {
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_free_lock(&klock, ktype);
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}
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if (vlock) {
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_free_lock(&vlock, vtype);
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}
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if (ret == 0 && r_valid) {
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*r_valid = true;
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}
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}
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void JavaScriptObjectImpl::_get_property_list(List<PropertyInfo> *p_list) const {
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}
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void JavaScriptObjectImpl::_free_lock(void **p_lock, int p_type) {
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ERR_FAIL_COND_MSG(*p_lock == nullptr, "No lock to free!");
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const Variant::Type type = (Variant::Type)p_type;
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switch (type) {
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case Variant::STRING: {
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CharString *cs = (CharString *)(*p_lock);
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memdelete(cs);
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*p_lock = nullptr;
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} break;
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default:
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ERR_FAIL_MSG("Unknown lock type to free. Likely a bug.");
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}
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}
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Variant JavaScriptObjectImpl::_js2variant(int p_type, godot_js_wrapper_ex *p_val) {
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Variant::Type type = (Variant::Type)p_type;
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switch (type) {
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case Variant::BOOL:
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return Variant((bool)p_val->i);
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case Variant::INT:
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return p_val->i;
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case Variant::FLOAT:
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return p_val->r;
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case Variant::STRING: {
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String out = String::utf8((const char *)p_val->p);
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free(p_val->p);
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return out;
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}
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case Variant::OBJECT: {
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return memnew(JavaScriptObjectImpl(p_val->i));
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}
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default:
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return Variant();
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}
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}
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int JavaScriptObjectImpl::_variant2js(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock) {
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const Variant **args = (const Variant **)p_args;
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const Variant *v = args[p_pos];
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Variant::Type type = v->get_type();
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switch (type) {
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case Variant::BOOL:
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r_val->i = v->operator bool() ? 1 : 0;
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break;
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case Variant::INT: {
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const int64_t tmp = v->operator int64_t();
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if (tmp >= 1 << 31) {
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r_val->r = (double)tmp;
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return Variant::FLOAT;
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}
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r_val->i = v->operator int64_t();
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} break;
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case Variant::FLOAT:
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r_val->r = v->operator real_t();
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break;
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case Variant::STRING: {
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CharString *cs = memnew(CharString(v->operator String().utf8()));
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r_val->p = (void *)cs->get_data();
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*p_lock = (void *)cs;
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} break;
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case Variant::OBJECT: {
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JavaScriptObject *js_obj = Object::cast_to<JavaScriptObject>(v->operator Object *());
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r_val->i = js_obj != nullptr ? ((JavaScriptObjectImpl *)js_obj)->_js_id : 0;
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} break;
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default:
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break;
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}
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return type;
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}
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Variant JavaScriptObjectImpl::call(const StringName &p_method, const Variant **p_args, int p_argc, Callable::CallError &r_error) {
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godot_js_wrapper_ex exchange;
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const String method = p_method;
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void *lock = nullptr;
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const int type = godot_js_wrapper_object_call(_js_id, method.utf8().get_data(), (void **)p_args, p_argc, &_variant2js, &exchange, &lock, &_free_lock);
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r_error.error = Callable::CallError::CALL_OK;
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if (type < 0) {
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r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
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return Variant();
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}
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return _js2variant(type, &exchange);
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}
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void JavaScriptObjectImpl::_callback(void *p_ref, int p_args_id, int p_argc) {
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const JavaScriptObjectImpl *obj = (JavaScriptObjectImpl *)p_ref;
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ERR_FAIL_COND_MSG(obj->_callable.is_null(), "JavaScript callback failed.");
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Vector<const Variant *> argp;
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Array arg_arr;
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for (int i = 0; i < p_argc; i++) {
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godot_js_wrapper_ex exchange;
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exchange.i = i;
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int type = godot_js_wrapper_object_getvar(p_args_id, Variant::INT, &exchange);
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arg_arr.push_back(_js2variant(type, &exchange));
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}
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Variant arg = arg_arr;
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const Variant *argv[1] = { &arg };
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Callable::CallError err;
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Variant ret;
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obj->_callable.call(argv, 1, ret, err);
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// Set return value
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godot_js_wrapper_ex exchange;
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void *lock = nullptr;
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const Variant *v = &ret;
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int type = _variant2js((const void **)&v, 0, &exchange, &lock);
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godot_js_wrapper_object_set_cb_ret(type, &exchange);
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if (lock) {
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_free_lock(&lock, type);
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}
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}
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Ref<JavaScriptObject> JavaScript::create_callback(const Callable &p_callable) {
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Ref<JavaScriptObjectImpl> out = memnew(JavaScriptObjectImpl);
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out->_callable = p_callable;
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out->_js_id = godot_js_wrapper_create_cb(out.ptr(), JavaScriptObjectImpl::_callback);
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return out;
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}
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Ref<JavaScriptObject> JavaScript::get_interface(const String &p_interface) {
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int js_id = godot_js_wrapper_interface_get(p_interface.utf8().get_data());
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ERR_FAIL_COND_V_MSG(!js_id, Ref<JavaScriptObject>(), "No interface '" + p_interface + "' registered.");
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return Ref<JavaScriptObject>(memnew(JavaScriptObjectImpl(js_id)));
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}
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Variant JavaScript::_create_object_bind(const Variant **p_args, int p_argcount, Callable::CallError &r_error) {
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if (p_argcount < 1) {
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r_error.error = Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
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r_error.argument = 0;
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return Ref<JavaScriptObject>();
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}
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if (p_args[0]->get_type() != Variant::STRING) {
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r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT;
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r_error.argument = 0;
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r_error.expected = Variant::STRING;
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return Ref<JavaScriptObject>();
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}
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godot_js_wrapper_ex exchange;
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const String object = *p_args[0];
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void *lock = nullptr;
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const Variant **args = p_argcount > 1 ? &p_args[1] : nullptr;
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const int type = godot_js_wrapper_create_object(object.utf8().get_data(), (void **)args, p_argcount - 1, &JavaScriptObjectImpl::_variant2js, &exchange, &lock, &JavaScriptObjectImpl::_free_lock);
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r_error.error = Callable::CallError::CALL_OK;
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if (type < 0) {
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r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
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return Ref<JavaScriptObject>();
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}
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return JavaScriptObjectImpl::_js2variant(type, &exchange);
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}
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extern "C" {
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union js_eval_ret {
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uint32_t b;
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double d;
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char *s;
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};
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extern int godot_js_eval(const char *p_js, int p_use_global_ctx, union js_eval_ret *p_union_ptr, void *p_byte_arr, void *p_byte_arr_write, void *(*p_callback)(void *p_ptr, void *p_ptr2, int p_len));
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}
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void *resize_PackedByteArray_and_open_write(void *p_arr, void *r_write, int p_len) {
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PackedByteArray *arr = (PackedByteArray *)p_arr;
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VectorWriteProxy<uint8_t> *write = (VectorWriteProxy<uint8_t> *)r_write;
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arr->resize(p_len);
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*write = arr->write;
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return arr->ptrw();
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}
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Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
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union js_eval_ret js_data;
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PackedByteArray arr;
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VectorWriteProxy<uint8_t> arr_write;
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Variant::Type return_type = static_cast<Variant::Type>(godot_js_eval(p_code.utf8().get_data(), p_use_global_exec_context, &js_data, &arr, &arr_write, resize_PackedByteArray_and_open_write));
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switch (return_type) {
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case Variant::BOOL:
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return js_data.b;
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case Variant::FLOAT:
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return js_data.d;
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case Variant::STRING: {
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String str = String::utf8(js_data.s);
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free(js_data.s); // Must free the string allocated in JS.
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return str;
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}
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case Variant::PACKED_BYTE_ARRAY:
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arr_write = VectorWriteProxy<uint8_t>();
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return arr;
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default:
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return Variant();
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}
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}
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#endif // JAVASCRIPT_EVAL_ENABLED
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void JavaScript::download_buffer(Vector<uint8_t> p_arr, const String &p_name, const String &p_mime) {
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godot_js_os_download_buffer(p_arr.ptr(), p_arr.size(), p_name.utf8().get_data(), p_mime.utf8().get_data());
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}
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