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Diffstat (limited to 'platform/javascript/javascript_singleton.cpp')
| -rw-r--r-- | platform/javascript/javascript_singleton.cpp | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/platform/javascript/javascript_singleton.cpp b/platform/javascript/javascript_singleton.cpp new file mode 100644 index 0000000000..1dd73ef8e9 --- /dev/null +++ b/platform/javascript/javascript_singleton.cpp @@ -0,0 +1,357 @@ +/*************************************************************************/ +/* javascript_singleton.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "api/javascript_singleton.h" +#include "emscripten.h" + +extern "C" { +extern void godot_js_os_download_buffer(const uint8_t *p_buf, int p_buf_size, const char *p_name, const char *p_mime); +} + +#ifdef JAVASCRIPT_EVAL_ENABLED + +extern "C" { +typedef union { + int64_t i; + double r; + void *p; +} godot_js_wrapper_ex; + +typedef int (*GodotJSWrapperVariant2JSCallback)(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock); +typedef void (*GodotJSWrapperFreeLockCallback)(void **p_lock, int p_type); +extern int godot_js_wrapper_interface_get(const char *p_name); +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); +extern int godot_js_wrapper_object_get(int p_id, godot_js_wrapper_ex *p_val, const char *p_prop); +extern int godot_js_wrapper_object_getvar(int p_id, int p_type, godot_js_wrapper_ex *p_val); +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); +extern void godot_js_wrapper_object_set(int p_id, const char *p_name, int p_type, godot_js_wrapper_ex *p_val); +extern void godot_js_wrapper_object_unref(int p_id); +extern int godot_js_wrapper_create_cb(void *p_ref, void (*p_callback)(void *p_ref, int p_arg_id, int p_argc)); +extern void godot_js_wrapper_object_set_cb_ret(int p_type, godot_js_wrapper_ex *p_val); +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); +}; + +class JavaScriptObjectImpl : public JavaScriptObject { +private: + friend class JavaScript; + + int _js_id = 0; + Callable _callable; + + static int _variant2js(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock); + static void _free_lock(void **p_lock, int p_type); + static Variant _js2variant(int p_type, godot_js_wrapper_ex *p_val); + static void *_alloc_variants(int p_size); + static void _callback(void *p_ref, int p_arg_id, int p_argc); + +protected: + bool _set(const StringName &p_name, const Variant &p_value) override; + bool _get(const StringName &p_name, Variant &r_ret) const override; + void _get_property_list(List<PropertyInfo> *p_list) const override; + +public: + Variant getvar(const Variant &p_key, bool *r_valid = nullptr) const override; + void setvar(const Variant &p_key, const Variant &p_value, bool *r_valid = nullptr) override; + Variant call(const StringName &p_method, const Variant **p_args, int p_argc, Callable::CallError &r_error) override; + JavaScriptObjectImpl() {} + JavaScriptObjectImpl(int p_id) { _js_id = p_id; } + ~JavaScriptObjectImpl() { + if (_js_id) { + godot_js_wrapper_object_unref(_js_id); + } + } +}; + +bool JavaScriptObjectImpl::_set(const StringName &p_name, const Variant &p_value) { + ERR_FAIL_COND_V_MSG(!_js_id, false, "Invalid JS instance"); + const String name = p_name; + godot_js_wrapper_ex exchange; + void *lock = nullptr; + const Variant *v = &p_value; + int type = _variant2js((const void **)&v, 0, &exchange, &lock); + godot_js_wrapper_object_set(_js_id, name.utf8().get_data(), type, &exchange); + if (lock) { + _free_lock(&lock, type); + } + return true; +} + +bool JavaScriptObjectImpl::_get(const StringName &p_name, Variant &r_ret) const { + ERR_FAIL_COND_V_MSG(!_js_id, false, "Invalid JS instance"); + const String name = p_name; + godot_js_wrapper_ex exchange; + int type = godot_js_wrapper_object_get(_js_id, &exchange, name.utf8().get_data()); + r_ret = _js2variant(type, &exchange); + return true; +} + +Variant JavaScriptObjectImpl::getvar(const Variant &p_key, bool *r_valid) const { + if (r_valid) { + *r_valid = false; + } + godot_js_wrapper_ex exchange; + void *lock = nullptr; + const Variant *v = &p_key; + int prop_type = _variant2js((const void **)&v, 0, &exchange, &lock); + int type = godot_js_wrapper_object_getvar(_js_id, prop_type, &exchange); + if (lock) { + _free_lock(&lock, prop_type); + } + if (type < 0) { + return Variant(); + } + if (r_valid) { + *r_valid = true; + } + return _js2variant(type, &exchange); +} + +void JavaScriptObjectImpl::setvar(const Variant &p_key, const Variant &p_value, bool *r_valid) { + if (r_valid) { + *r_valid = false; + } + godot_js_wrapper_ex kex, vex; + void *klock = nullptr; + void *vlock = nullptr; + const Variant *kv = &p_key; + const Variant *vv = &p_value; + int ktype = _variant2js((const void **)&kv, 0, &kex, &klock); + int vtype = _variant2js((const void **)&vv, 0, &vex, &vlock); + int ret = godot_js_wrapper_object_setvar(_js_id, ktype, &kex, vtype, &vex); + if (klock) { + _free_lock(&klock, ktype); + } + if (vlock) { + _free_lock(&vlock, vtype); + } + if (ret == 0 && r_valid) { + *r_valid = true; + } +} + +void JavaScriptObjectImpl::_get_property_list(List<PropertyInfo> *p_list) const { +} + +void JavaScriptObjectImpl::_free_lock(void **p_lock, int p_type) { + ERR_FAIL_COND_MSG(*p_lock == nullptr, "No lock to free!"); + const Variant::Type type = (Variant::Type)p_type; + switch (type) { + case Variant::STRING: { + CharString *cs = (CharString *)(*p_lock); + memdelete(cs); + *p_lock = nullptr; + } break; + default: + ERR_FAIL_MSG("Unknown lock type to free. Likely a bug."); + } +} + +Variant JavaScriptObjectImpl::_js2variant(int p_type, godot_js_wrapper_ex *p_val) { + Variant::Type type = (Variant::Type)p_type; + switch (type) { + case Variant::BOOL: + return Variant((bool)p_val->i); + case Variant::INT: + return p_val->i; + case Variant::FLOAT: + return p_val->r; + case Variant::STRING: { + String out = String::utf8((const char *)p_val->p); + free(p_val->p); + return out; + } + case Variant::OBJECT: { + return memnew(JavaScriptObjectImpl(p_val->i)); + } + default: + return Variant(); + } +} + +int JavaScriptObjectImpl::_variant2js(const void **p_args, int p_pos, godot_js_wrapper_ex *r_val, void **p_lock) { + const Variant **args = (const Variant **)p_args; + const Variant *v = args[p_pos]; + Variant::Type type = v->get_type(); + switch (type) { + case Variant::BOOL: + r_val->i = v->operator bool() ? 1 : 0; + break; + case Variant::INT: { + const int64_t tmp = v->operator int64_t(); + if (tmp >= 1 << 31) { + r_val->r = (double)tmp; + return Variant::FLOAT; + } + r_val->i = v->operator int64_t(); + } break; + case Variant::FLOAT: + r_val->r = v->operator real_t(); + break; + case Variant::STRING: { + CharString *cs = memnew(CharString(v->operator String().utf8())); + r_val->p = (void *)cs->get_data(); + *p_lock = (void *)cs; + } break; + case Variant::OBJECT: { + JavaScriptObject *js_obj = Object::cast_to<JavaScriptObject>(v->operator Object *()); + r_val->i = js_obj != nullptr ? ((JavaScriptObjectImpl *)js_obj)->_js_id : 0; + } break; + default: + break; + } + return type; +} + +Variant JavaScriptObjectImpl::call(const StringName &p_method, const Variant **p_args, int p_argc, Callable::CallError &r_error) { + godot_js_wrapper_ex exchange; + const String method = p_method; + void *lock = nullptr; + const int type = godot_js_wrapper_object_call(_js_id, method.utf8().get_data(), (void **)p_args, p_argc, &_variant2js, &exchange, &lock, &_free_lock); + r_error.error = Callable::CallError::CALL_OK; + if (type < 0) { + r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL; + return Variant(); + } + return _js2variant(type, &exchange); +} + +void JavaScriptObjectImpl::_callback(void *p_ref, int p_args_id, int p_argc) { + const JavaScriptObjectImpl *obj = (JavaScriptObjectImpl *)p_ref; + ERR_FAIL_COND_MSG(obj->_callable.is_null(), "JavaScript callback failed."); + Vector<const Variant *> argp; + Array arg_arr; + for (int i = 0; i < p_argc; i++) { + godot_js_wrapper_ex exchange; + exchange.i = i; + int type = godot_js_wrapper_object_getvar(p_args_id, Variant::INT, &exchange); + arg_arr.push_back(_js2variant(type, &exchange)); + } + Variant arg = arg_arr; + const Variant *argv[1] = { &arg }; + Callable::CallError err; + Variant ret; + obj->_callable.call(argv, 1, ret, err); + + // Set return value + godot_js_wrapper_ex exchange; + void *lock = nullptr; + const Variant *v = &ret; + int type = _variant2js((const void **)&v, 0, &exchange, &lock); + godot_js_wrapper_object_set_cb_ret(type, &exchange); + if (lock) { + _free_lock(&lock, type); + } +} + +Ref<JavaScriptObject> JavaScript::create_callback(const Callable &p_callable) { + Ref<JavaScriptObjectImpl> out = memnew(JavaScriptObjectImpl); + out->_callable = p_callable; + out->_js_id = godot_js_wrapper_create_cb(out.ptr(), JavaScriptObjectImpl::_callback); + return out; +} + +Ref<JavaScriptObject> JavaScript::get_interface(const String &p_interface) { + int js_id = godot_js_wrapper_interface_get(p_interface.utf8().get_data()); + ERR_FAIL_COND_V_MSG(!js_id, Ref<JavaScriptObject>(), "No interface '" + p_interface + "' registered."); + return Ref<JavaScriptObject>(memnew(JavaScriptObjectImpl(js_id))); +} + +Variant JavaScript::_create_object_bind(const Variant **p_args, int p_argcount, Callable::CallError &r_error) { + if (p_argcount < 1) { + r_error.error = Callable::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS; + r_error.argument = 0; + return Ref<JavaScriptObject>(); + } + if (p_args[0]->get_type() != Variant::STRING) { + r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT; + r_error.argument = 0; + r_error.expected = Variant::STRING; + return Ref<JavaScriptObject>(); + } + godot_js_wrapper_ex exchange; + const String object = *p_args[0]; + void *lock = nullptr; + const Variant **args = p_argcount > 1 ? &p_args[1] : nullptr; + const int type = godot_js_wrapper_create_object(object.utf8().get_data(), (void **)args, p_argcount - 1, &JavaScriptObjectImpl::_variant2js, &exchange, &lock, &JavaScriptObjectImpl::_free_lock); + r_error.error = Callable::CallError::CALL_OK; + if (type < 0) { + r_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL; + return Ref<JavaScriptObject>(); + } + return JavaScriptObjectImpl::_js2variant(type, &exchange); +} + +extern "C" { +union js_eval_ret { + uint32_t b; + double d; + char *s; +}; + +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)); +} + +void *resize_PackedByteArray_and_open_write(void *p_arr, void *r_write, int p_len) { + PackedByteArray *arr = (PackedByteArray *)p_arr; + VectorWriteProxy<uint8_t> *write = (VectorWriteProxy<uint8_t> *)r_write; + arr->resize(p_len); + *write = arr->write; + return arr->ptrw(); +} + +Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) { + union js_eval_ret js_data; + PackedByteArray arr; + VectorWriteProxy<uint8_t> arr_write; + + 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)); + + switch (return_type) { + case Variant::BOOL: + return js_data.b; + case Variant::FLOAT: + return js_data.d; + case Variant::STRING: { + String str = String::utf8(js_data.s); + free(js_data.s); // Must free the string allocated in JS. + return str; + } + case Variant::PACKED_BYTE_ARRAY: + arr_write = VectorWriteProxy<uint8_t>(); + return arr; + default: + return Variant(); + } +} +#endif // JAVASCRIPT_EVAL_ENABLED + +void JavaScript::download_buffer(Vector<uint8_t> p_arr, const String &p_name, const String &p_mime) { + godot_js_os_download_buffer(p_arr.ptr(), p_arr.size(), p_name.utf8().get_data(), p_mime.utf8().get_data()); +} |