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[HTML5] Implement Godot <-> JavaScript interface.

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This commit is contained in:
Fabio Alessandrelli 2021-01-26 10:06:29 +01:00
parent fcfce4be67
commit 730a894bcf
9 changed files with 797 additions and 172 deletions
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29
doc/classes/JavaScript.xml
View file

@ -11,6 +11,26 @@
<link>https://docs.godotengine.org/en/3.3/getting_started/workflow/export/exporting_for_web.html#calling-javascript-from-script</link>
</tutorials>
<methods>
<method name="create_callback">
<return type="JavaScriptObject">
</return>
<argument index="0" name="object" type="Object">
</argument>
<argument index="1" name="method" type="String">
</argument>
<description>
Creates a reference to a script function that can be used as a callback by JavaScript. The reference must be kept until the callback happens, or it won't be called at all. See [JavaScriptObject] for usage.
</description>
</method>
<method name="create_object" qualifiers="vararg">
<return type="Variant">
</return>
<argument index="0" name="object" type="String">
</argument>
<description>
Creates a new JavaScript object using the [code]new[/code] constructor. The [code]object[/code] must a valid property of the JavaScript [code]window[/code]. See [JavaScriptObject] for usage.
</description>
</method>
<method name="eval">
<return type="Variant">
</return>
@ -23,6 +43,15 @@
If [code]use_global_execution_context[/code] is [code]true[/code], the code will be evaluated in the global execution context. Otherwise, it is evaluated in the execution context of a function within the engine's runtime environment.
</description>
</method>
<method name="get_interface">
<return type="JavaScriptObject">
</return>
<argument index="0" name="interface" type="String">
</argument>
<description>
Returns an interface to a JavaScript object that can be used by scripts. The [code]interface[/code] must be a valid property of the JavaScript [code]window[/code]. The callback must accept a single [Array] argument, which will contain the JavaScript [code]arguments[/code]. See [JavaScriptObject] for usage.
</description>
</method>
</methods>
<constants>
</constants>

42
doc/classes/JavaScriptObject.xml Normal file
View file

@ -0,0 +1,42 @@
<?xml version="1.0" encoding="UTF-8" ?>
<class name="JavaScriptObject" inherits="Reference" version="3.4">
<brief_description>
A wrapper class for native JavaScript objects.
</brief_description>
<description>
JavaScriptObject is used to interact with JavaScript objects retrieved or created via [method JavaScript.get_interface], [method JavaScript.create_object], or [method JavaScript.create_callback].
Example:
[codeblock]
extends Node
var _my_js_callback = JavaScript.create_callback(self, "myCallback") # This reference must be kept
var console = JavaScript.get_interface("console")
func _init():
var buf = JavaScript.create_object("ArrayBuffer", 10) # new ArrayBuffer(10)
print(buf) # prints [JavaScriptObject:OBJECT_ID]
var uint8arr = JavaScript.create_object("Uint8Array", buf) # new Uint8Array(buf)
uint8arr[1] = 255
prints(uint8arr[1], uint8arr.byteLength) # prints 255 10
console.log(uint8arr) # prints in browser console "Uint8Array(10) [ 0, 255, 0, 0, 0, 0, 0, 0, 0, 0 ]"
# Equivalent of JavaScript: Array.from(uint8arr).forEach(myCallback)
JavaScript.get_interface("Array").from(uint8arr).forEach(_my_js_callback)
func myCallback(args):
# Will be called with the parameters passed to the "forEach" callback
# [0, 0, [JavaScriptObject:1173]]
# [255, 1, [JavaScriptObject:1173]]
# ...
# [0, 9, [JavaScriptObject:1180]]
print(args)
[/codeblock]
Note: Only available in the "HTML5" platform.
</description>
<tutorials>
</tutorials>
<methods>
</methods>
<constants>
</constants>
</class>

4
platform/javascript/SCsub
View file

@ -5,7 +5,7 @@ Import("env")
javascript_files = [
"audio_driver_javascript.cpp",
"http_client_javascript.cpp",
"javascript_eval.cpp",
"javascript_singleton.cpp",
"javascript_main.cpp",
"os_javascript.cpp",
"api/javascript_tools_editor_plugin.cpp",
@ -25,7 +25,7 @@ sys_env.AddJSLibraries(
if env["tools"]:
sys_env.AddJSLibraries(["js/libs/library_godot_editor_tools.js"])
if env["javascript_eval"]:
sys_env.AddJSLibraries(["js/libs/library_godot_eval.js"])
sys_env.AddJSLibraries(["js/libs/library_godot_javascript_singleton.js"])
for lib in sys_env["JS_LIBS"]:
sys_env.Append(LINKFLAGS=["--js-library", lib])

34
platform/javascript/api/api.cpp
View file

@ -30,13 +30,14 @@
#include "api.h"
#include "core/engine.h"
#include "javascript_eval.h"
#include "javascript_singleton.h"
#include "javascript_tools_editor_plugin.h"
static JavaScript *javascript_eval;
void register_javascript_api() {
JavaScriptToolsEditorPlugin::initialize();
ClassDB::register_virtual_class<JavaScriptObject>();
ClassDB::register_virtual_class<JavaScript>();
javascript_eval = memnew(JavaScript);
Engine::get_singleton()->add_singleton(Engine::Singleton("JavaScript", javascript_eval));
@ -61,10 +62,41 @@ JavaScript::~JavaScript() {}
void JavaScript::_bind_methods() {
ClassDB::bind_method(D_METHOD("eval", "code", "use_global_execution_context"), &JavaScript::eval, DEFVAL(false));
ClassDB::bind_method(D_METHOD("get_interface", "interface"), &JavaScript::get_interface);
ClassDB::bind_method(D_METHOD("create_callback", "object", "method"), &JavaScript::create_callback);
{
MethodInfo mi;
mi.name = "create_object";
mi.arguments.push_back(PropertyInfo(Variant::STRING, "object"));
ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "create_object", &JavaScript::_create_object_bind, mi);
}
}
#if !defined(JAVASCRIPT_ENABLED) || !defined(JAVASCRIPT_EVAL_ENABLED)
Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
return Variant();
}
Ref<JavaScriptObject> JavaScript::get_interface(const String &p_interface) {
return Ref<JavaScriptObject>();
}
Ref<JavaScriptObject> JavaScript::create_callback(Object *p_ref, const StringName &p_method) {
return Ref<JavaScriptObject>();
}
Variant JavaScript::_create_object_bind(const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
if (p_argcount < 1) {
r_error.error = Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
r_error.argument = 0;
return Ref<JavaScriptObject>();
}
if (p_args[0]->get_type() != Variant::STRING) {
r_error.error = Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;
r_error.argument = 0;
r_error.expected = Variant::STRING;
return Ref<JavaScriptObject>();
}
return Ref<JavaScriptObject>();
}
#endif

22
platform/javascript/api/javascript_eval.h → platform/javascript/api/javascript_singleton.h
View file

@ -1,5 +1,5 @@
/*************************************************************************/
/* javascript_eval.h */
/* javascript_singleton.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
@ -28,10 +28,21 @@
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef JAVASCRIPT_EVAL_H
#define JAVASCRIPT_EVAL_H
#ifndef JAVASCRIPT_SINGLETON_H
#define JAVASCRIPT_SINGLETON_H
#include "core/object.h"
#include "core/reference.h"
class JavaScriptObject : public Reference {
private:
GDCLASS(JavaScriptObject, Reference);
protected:
virtual bool _set(const StringName &p_name, const Variant &p_value) { return false; }
virtual bool _get(const StringName &p_name, Variant &r_ret) const { return false; }
virtual void _get_property_list(List<PropertyInfo> *p_list) const {}
};
class JavaScript : public Object {
private:
@ -44,10 +55,13 @@ protected:
public:
Variant eval(const String &p_code, bool p_use_global_exec_context = false);
Ref<JavaScriptObject> get_interface(const String &p_interface);
Ref<JavaScriptObject> create_callback(Object *p_ref, const StringName &p_method);
Variant _create_object_bind(const Variant **p_args, int p_argcount, Variant::CallError &r_error);
static JavaScript *get_singleton();
JavaScript();
~JavaScript();
};
#endif // JAVASCRIPT_EVAL_H
#endif // JAVASCRIPT_SINGLETON_H

79
platform/javascript/javascript_eval.cpp
View file

@ -1,79 +0,0 @@
/*************************************************************************/
/* javascript_eval.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. */
/*************************************************************************/
#ifdef JAVASCRIPT_EVAL_ENABLED
#include "api/javascript_eval.h"
#include "emscripten.h"
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_poolbytearray_and_open_write(void *p_arr, void *r_write, int p_len) {
PoolByteArray *arr = (PoolByteArray *)p_arr;
PoolByteArray::Write *write = (PoolByteArray::Write *)r_write;
arr->resize(p_len);
*write = arr->write();
return write->ptr();
}
Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
PoolByteArray arr;
PoolByteArray::Write arr_write;
union js_eval_ret js_data;
memset(&js_data, 0, sizeof(js_data));
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_poolbytearray_and_open_write));
switch (return_type) {
case Variant::BOOL:
return js_data.b == 1;
case Variant::REAL:
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::POOL_BYTE_ARRAY:
arr_write = PoolByteArray::Write();
return arr;
default:
return Variant();
}
}
#endif // JAVASCRIPT_EVAL_ENABLED

340
platform/javascript/javascript_singleton.cpp Normal file
View file

@ -0,0 +1,340 @@
/*************************************************************************/
/* 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. */
/*************************************************************************/
#ifdef JAVASCRIPT_EVAL_ENABLED
#include "api/javascript_singleton.h"
#include "emscripten.h"
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 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;
Object *_ref = nullptr;
StringName _method;
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, Variant::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::REAL:
return p_val->r;
case Variant::STRING: {
String out((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::REAL;
}
r_val->i = v->operator int64_t();
} break;
case Variant::REAL:
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, Variant::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 = Variant::CallError::CALL_OK;
if (type < 0) {
r_error.error = Variant::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->_ref == nullptr, "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 };
Variant::CallError err;
obj->_ref->call(obj->_method, argv, 1, err);
}
Ref<JavaScriptObject> JavaScript::create_callback(Object *p_ref, const StringName &p_method) {
Ref<JavaScriptObjectImpl> out = memnew(JavaScriptObjectImpl);
out->_ref = p_ref;
out->_method = p_method;
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, Variant::CallError &r_error) {
if (p_argcount < 1) {
r_error.error = Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
r_error.argument = 0;
return Ref<JavaScriptObject>();
}
if (p_args[0]->get_type() != Variant::STRING) {
r_error.error = Variant::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 = Variant::CallError::CALL_OK;
if (type < 0) {
r_error.error = Variant::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_poolbytearray_and_open_write(void *p_arr, void *r_write, int p_len) {
PoolByteArray *arr = (PoolByteArray *)p_arr;
PoolByteArray::Write *write = (PoolByteArray::Write *)r_write;
arr->resize(p_len);
*write = arr->write();
return write->ptr();
}
Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
PoolByteArray arr;
PoolByteArray::Write arr_write;
union js_eval_ret js_data;
memset(&js_data, 0, sizeof(js_data));
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_poolbytearray_and_open_write));
switch (return_type) {
case Variant::BOOL:
return js_data.b == 1;
case Variant::REAL:
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::POOL_BYTE_ARRAY:
arr_write = PoolByteArray::Write();
return arr;
default:
return Variant();
}
}
#endif // JAVASCRIPT_EVAL_ENABLED

86
platform/javascript/js/libs/library_godot_eval.js
View file

@ -1,86 +0,0 @@
/*************************************************************************/
/* library_godot_eval.js */
/*************************************************************************/
/* 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. */
/*************************************************************************/
const GodotEval = {
godot_js_eval__deps: ['$GodotRuntime'],
godot_js_eval__sig: 'iiiiiii',
godot_js_eval: function (p_js, p_use_global_ctx, p_union_ptr, p_byte_arr, p_byte_arr_write, p_callback) {
const js_code = GodotRuntime.parseString(p_js);
let eval_ret = null;
try {
if (p_use_global_ctx) {
// indirect eval call grants global execution context
const global_eval = eval; // eslint-disable-line no-eval
eval_ret = global_eval(js_code);
} else {
eval_ret = eval(js_code); // eslint-disable-line no-eval
}
} catch (e) {
GodotRuntime.error(e);
}
switch (typeof eval_ret) {
case 'boolean':
GodotRuntime.setHeapValue(p_union_ptr, eval_ret, 'i32');
return 1; // BOOL
case 'number':
GodotRuntime.setHeapValue(p_union_ptr, eval_ret, 'double');
return 3; // REAL
case 'string':
GodotRuntime.setHeapValue(p_union_ptr, GodotRuntime.allocString(eval_ret), '*');
return 4; // STRING
case 'object':
if (eval_ret === null) {
break;
}
if (ArrayBuffer.isView(eval_ret) && !(eval_ret instanceof Uint8Array)) {
eval_ret = new Uint8Array(eval_ret.buffer);
} else if (eval_ret instanceof ArrayBuffer) {
eval_ret = new Uint8Array(eval_ret);
}
if (eval_ret instanceof Uint8Array) {
const func = GodotRuntime.get_func(p_callback);
const bytes_ptr = func(p_byte_arr, p_byte_arr_write, eval_ret.length);
HEAPU8.set(eval_ret, bytes_ptr);
return 20; // POOL_BYTE_ARRAY
}
break;
// no default
}
return 0; // NIL
},
};
mergeInto(LibraryManager.library, GodotEval);

333
platform/javascript/js/libs/library_godot_javascript_singleton.js Normal file
View file

@ -0,0 +1,333 @@
/*************************************************************************/
/* library_godot_eval.js */
/*************************************************************************/
/* 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. */
/*************************************************************************/
const GodotJSWrapper = {
$GodotJSWrapper__deps: ['$GodotRuntime', '$IDHandler'],
$GodotJSWrapper__postset: 'GodotJSWrapper.proxies = new Map();',
$GodotJSWrapper: {
proxies: null,
MyProxy: function (val) {
const id = IDHandler.add(this);
GodotJSWrapper.proxies.set(val, id);
let refs = 1;
this.ref = function () {
refs++;
};
this.unref = function () {
refs--;
if (refs === 0) {
IDHandler.remove(id);
GodotJSWrapper.proxies.delete(val);
}
};
this.get_val = function () {
return val;
};
this.get_id = function () {
return id;
};
},
get_proxied: function (val) {
const id = GodotJSWrapper.proxies.get(val);
if (id === undefined) {
const proxy = new GodotJSWrapper.MyProxy(val);
return proxy.get_id();
}
IDHandler.get(id).ref();
return id;
},
get_proxied_value: function (id) {
const proxy = IDHandler.get(id);
if (proxy === undefined) {
return undefined;
}
return proxy.get_val();
},
variant2js: function (type, val) {
switch (type) {
case 0:
return null;
case 1:
return !!GodotRuntime.getHeapValue(val, 'i64');
case 2:
return GodotRuntime.getHeapValue(val, 'i64');
case 3:
return GodotRuntime.getHeapValue(val, 'double');
case 4:
return GodotRuntime.parseString(GodotRuntime.getHeapValue(val, '*'));
case 17: // OBJECT
return GodotJSWrapper.get_proxied_value(GodotRuntime.getHeapValue(val, 'i64'));
default:
return undefined;
}
},
js2variant: function (p_val, p_exchange) {
if (p_val === undefined || p_val === null) {
return 0; // NIL
}
const type = typeof (p_val);
if (type === 'boolean') {
GodotRuntime.setHeapValue(p_exchange, p_val, 'i64');
return 1; // BOOL
} else if (type === 'number') {
if (Number.isInteger(p_val)) {
GodotRuntime.setHeapValue(p_exchange, p_val, 'i64');
return 2; // INT
}
GodotRuntime.setHeapValue(p_exchange, p_val, 'double');
return 3; // REAL
} else if (type === 'string') {
const c_str = GodotRuntime.allocString(p_val);
GodotRuntime.setHeapValue(p_exchange, c_str, '*');
return 4; // STRING
}
const id = GodotJSWrapper.get_proxied(p_val);
GodotRuntime.setHeapValue(p_exchange, id, 'i64');
return 17;
},
},
godot_js_wrapper_interface_get__sig: 'ii',
godot_js_wrapper_interface_get: function (p_name) {
const name = GodotRuntime.parseString(p_name);
if (typeof (window[name]) !== 'undefined') {
return GodotJSWrapper.get_proxied(window[name]);
}
return 0;
},
godot_js_wrapper_object_get__sig: 'iiii',
godot_js_wrapper_object_get: function (p_id, p_exchange, p_prop) {
const obj = GodotJSWrapper.get_proxied_value(p_id);
if (obj === undefined) {
return 0;
}
if (p_prop) {
const prop = GodotRuntime.parseString(p_prop);
try {
return GodotJSWrapper.js2variant(obj[prop], p_exchange);
} catch (e) {
GodotRuntime.error(`Error getting variable ${prop} on object`, obj);
return 0; // NIL
}
}
return GodotJSWrapper.js2variant(obj, p_exchange);
},
godot_js_wrapper_object_set__sig: 'viiii',
godot_js_wrapper_object_set: function (p_id, p_name, p_type, p_exchange) {
const obj = GodotJSWrapper.get_proxied_value(p_id);
if (obj === undefined) {
return;
}
const name = GodotRuntime.parseString(p_name);
try {
obj[name] = GodotJSWrapper.variant2js(p_type, p_exchange);
} catch (e) {
GodotRuntime.error(`Error setting variable ${name} on object`, obj);
}
},
godot_js_wrapper_object_call__sig: 'iiiiiiiii',
godot_js_wrapper_object_call: function (p_id, p_method, p_args, p_argc, p_convert_callback, p_exchange, p_lock, p_free_lock_callback) {
const obj = GodotJSWrapper.get_proxied_value(p_id);
if (obj === undefined) {
return -1;
}
const method = GodotRuntime.parseString(p_method);
const convert = GodotRuntime.get_func(p_convert_callback);
const freeLock = GodotRuntime.get_func(p_free_lock_callback);
const args = new Array(p_argc);
for (let i = 0; i < p_argc; i++) {
const type = convert(p_args, i, p_exchange, p_lock);
const lock = GodotRuntime.getHeapValue(p_lock, '*');
args[i] = GodotJSWrapper.variant2js(type, p_exchange);
if (lock) {
freeLock(p_lock, type);
}
}
try {
const res = obj[method](...args);
return GodotJSWrapper.js2variant(res, p_exchange);
} catch (e) {
GodotRuntime.error(`Error calling method ${method} on:`, obj, 'error:', e);
return -1;
}
},
godot_js_wrapper_object_unref__sig: 'vi',
godot_js_wrapper_object_unref: function (p_id) {
const proxy = IDHandler.get(p_id);
if (proxy !== undefined) {
proxy.unref();
}
},
godot_js_wrapper_create_cb__sig: 'vii',
godot_js_wrapper_create_cb: function (p_ref, p_func) {
const func = GodotRuntime.get_func(p_func);
let id = 0;
const cb = function () {
if (!GodotJSWrapper.get_proxied_value(id)) {
return;
}
const args = Array.from(arguments);
func(p_ref, GodotJSWrapper.get_proxied(args), args.length);
};
id = GodotJSWrapper.get_proxied(cb);
return id;
},
godot_js_wrapper_object_getvar__sig: 'iiii',
godot_js_wrapper_object_getvar: function (p_id, p_type, p_exchange) {
const obj = GodotJSWrapper.get_proxied_value(p_id);
if (obj === undefined) {
return -1;
}
const prop = GodotJSWrapper.variant2js(p_type, p_exchange);
if (prop === undefined || prop === null) {
return -1;
}
try {
return GodotJSWrapper.js2variant(obj[prop], p_exchange);
} catch (e) {
GodotRuntime.error(`Error getting variable ${prop} on object`, obj, e);
return -1;
}
},
godot_js_wrapper_object_setvar__sig: 'iiiiii',
godot_js_wrapper_object_setvar: function (p_id, p_key_type, p_key_ex, p_val_type, p_val_ex) {
const obj = GodotJSWrapper.get_proxied_value(p_id);
if (obj === undefined) {
return -1;
}
const key = GodotJSWrapper.variant2js(p_key_type, p_key_ex);
try {
obj[key] = GodotJSWrapper.variant2js(p_val_type, p_val_ex);
return 0;
} catch (e) {
GodotRuntime.error(`Error setting variable ${key} on object`, obj);
return -1;
}
},
godot_js_wrapper_create_object__sig: 'iiiiiiii',
godot_js_wrapper_create_object: function (p_object, p_args, p_argc, p_convert_callback, p_exchange, p_lock, p_free_lock_callback) {
const name = GodotRuntime.parseString(p_object);
if (typeof (window[name]) === 'undefined') {
return -1;
}
const convert = GodotRuntime.get_func(p_convert_callback);
const freeLock = GodotRuntime.get_func(p_free_lock_callback);
const args = new Array(p_argc);
for (let i = 0; i < p_argc; i++) {
const type = convert(p_args, i, p_exchange, p_lock);
const lock = GodotRuntime.getHeapValue(p_lock, '*');
args[i] = GodotJSWrapper.variant2js(type, p_exchange);
if (lock) {
freeLock(p_lock, type);
}
}
try {
const res = new window[name](...args);
return GodotJSWrapper.js2variant(res, p_exchange);
} catch (e) {
GodotRuntime.error(`Error calling constructor ${name} with args:`, args, 'error:', e);
return -1;
}
},
};
autoAddDeps(GodotJSWrapper, '$GodotJSWrapper');
mergeInto(LibraryManager.library, GodotJSWrapper);
const GodotEval = {
godot_js_eval__deps: ['$GodotRuntime'],
godot_js_eval__sig: 'iiiiiii',
godot_js_eval: function (p_js, p_use_global_ctx, p_union_ptr, p_byte_arr, p_byte_arr_write, p_callback) {
const js_code = GodotRuntime.parseString(p_js);
let eval_ret = null;
try {
if (p_use_global_ctx) {
// indirect eval call grants global execution context
const global_eval = eval; // eslint-disable-line no-eval
eval_ret = global_eval(js_code);
} else {
eval_ret = eval(js_code); // eslint-disable-line no-eval
}
} catch (e) {
GodotRuntime.error(e);
}
switch (typeof eval_ret) {
case 'boolean':
GodotRuntime.setHeapValue(p_union_ptr, eval_ret, 'i32');
return 1; // BOOL
case 'number':
GodotRuntime.setHeapValue(p_union_ptr, eval_ret, 'double');
return 3; // REAL
case 'string':
GodotRuntime.setHeapValue(p_union_ptr, GodotRuntime.allocString(eval_ret), '*');
return 4; // STRING
case 'object':
if (eval_ret === null) {
break;
}
if (ArrayBuffer.isView(eval_ret) && !(eval_ret instanceof Uint8Array)) {
eval_ret = new Uint8Array(eval_ret.buffer);
} else if (eval_ret instanceof ArrayBuffer) {
eval_ret = new Uint8Array(eval_ret);
}
if (eval_ret instanceof Uint8Array) {
const func = GodotRuntime.get_func(p_callback);
const bytes_ptr = func(p_byte_arr, p_byte_arr_write, eval_ret.length);
HEAPU8.set(eval_ret, bytes_ptr);
return 20; // POOL_BYTE_ARRAY
}
break;
// no default
}
return 0; // NIL
},
};
mergeInto(LibraryManager.library, GodotEval);