godot/platform/javascript/os_javascript.cpp
2020-07-01 17:16:13 +02:00

260 lines
7.9 KiB
C++

/*************************************************************************/
/* os_javascript.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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 "os_javascript.h"
#include "core/debugger/engine_debugger.h"
#include "core/io/file_access_buffered_fa.h"
#include "core/io/json.h"
#include "drivers/unix/dir_access_unix.h"
#include "drivers/unix/file_access_unix.h"
#include "main/main.h"
#include "modules/modules_enabled.gen.h"
#include "platform/javascript/display_server_javascript.h"
#ifdef MODULE_WEBSOCKET_ENABLED
#include "modules/websocket/remote_debugger_peer_websocket.h"
#endif
#include <emscripten.h>
#include <stdlib.h>
bool OS_JavaScript::has_touchscreen_ui_hint() const {
/* clang-format off */
return EM_ASM_INT_V(
return 'ontouchstart' in window;
);
/* clang-format on */
}
// Audio
int OS_JavaScript::get_audio_driver_count() const {
return 1;
}
const char *OS_JavaScript::get_audio_driver_name(int p_driver) const {
return "JavaScript";
}
// Lifecycle
void OS_JavaScript::initialize() {
OS_Unix::initialize_core();
FileAccess::make_default<FileAccessBufferedFA<FileAccessUnix>>(FileAccess::ACCESS_RESOURCES);
DisplayServerJavaScript::register_javascript_driver();
#ifdef MODULE_WEBSOCKET_ENABLED
EngineDebugger::register_uri_handler("ws://", RemoteDebuggerPeerWebSocket::create);
EngineDebugger::register_uri_handler("wss://", RemoteDebuggerPeerWebSocket::create);
#endif
}
void OS_JavaScript::resume_audio() {
if (audio_driver_javascript) {
audio_driver_javascript->resume();
}
}
void OS_JavaScript::set_main_loop(MainLoop *p_main_loop) {
main_loop = p_main_loop;
}
MainLoop *OS_JavaScript::get_main_loop() const {
return main_loop;
}
void OS_JavaScript::main_loop_callback() {
get_singleton()->main_loop_iterate();
}
bool OS_JavaScript::main_loop_iterate() {
if (is_userfs_persistent() && sync_wait_time >= 0) {
int64_t current_time = get_ticks_msec();
int64_t elapsed_time = current_time - last_sync_check_time;
last_sync_check_time = current_time;
sync_wait_time -= elapsed_time;
if (sync_wait_time < 0) {
/* clang-format off */
EM_ASM(
FS.syncfs(function(error) {
if (error) { err('Failed to save IDB file system: ' + error.message); }
});
);
/* clang-format on */
}
}
DisplayServer::get_singleton()->process_events();
return Main::iteration();
}
void OS_JavaScript::delete_main_loop() {
if (main_loop) {
memdelete(main_loop);
}
main_loop = nullptr;
}
void OS_JavaScript::finalize_async() {
finalizing = true;
if (audio_driver_javascript) {
audio_driver_javascript->finish_async();
}
}
void OS_JavaScript::finalize() {
delete_main_loop();
if (audio_driver_javascript) {
memdelete(audio_driver_javascript);
audio_driver_javascript = nullptr;
}
}
// Miscellaneous
Error OS_JavaScript::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr, Mutex *p_pipe_mutex) {
Array args;
for (const List<String>::Element *E = p_arguments.front(); E; E = E->next()) {
args.push_back(E->get());
}
String json_args = JSON::print(args);
/* clang-format off */
int failed = EM_ASM_INT({
const json_args = UTF8ToString($0);
const args = JSON.parse(json_args);
if (Module["onExecute"]) {
Module["onExecute"](args);
return 0;
}
return 1;
}, json_args.utf8().get_data());
/* clang-format on */
ERR_FAIL_COND_V_MSG(failed, ERR_UNAVAILABLE, "OS::execute() must be implemented in JavaScript via 'engine.setOnExecute' if required.");
return OK;
}
Error OS_JavaScript::kill(const ProcessID &p_pid) {
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "OS::kill() is not available on the HTML5 platform.");
}
int OS_JavaScript::get_process_id() const {
ERR_FAIL_V_MSG(0, "OS::get_process_id() is not available on the HTML5 platform.");
}
bool OS_JavaScript::_check_internal_feature_support(const String &p_feature) {
if (p_feature == "HTML5" || p_feature == "web")
return true;
#ifdef JAVASCRIPT_EVAL_ENABLED
if (p_feature == "JavaScript")
return true;
#endif
return false;
}
String OS_JavaScript::get_executable_path() const {
return OS::get_executable_path();
}
Error OS_JavaScript::shell_open(String p_uri) {
// Open URI in a new tab, browser will deal with it by protocol.
/* clang-format off */
EM_ASM_({
window.open(UTF8ToString($0), '_blank');
}, p_uri.utf8().get_data());
/* clang-format on */
return OK;
}
String OS_JavaScript::get_name() const {
return "HTML5";
}
bool OS_JavaScript::can_draw() const {
return true; // Always?
}
String OS_JavaScript::get_user_data_dir() const {
return "/userfs";
};
String OS_JavaScript::get_cache_path() const {
return "/home/web_user/.cache";
}
String OS_JavaScript::get_config_path() const {
return "/home/web_user/.config";
}
String OS_JavaScript::get_data_path() const {
return "/home/web_user/.local/share";
}
void OS_JavaScript::file_access_close_callback(const String &p_file, int p_flags) {
OS_JavaScript *os = get_singleton();
if (os->is_userfs_persistent() && p_file.begins_with("/userfs") && p_flags & FileAccess::WRITE) {
os->last_sync_check_time = OS::get_singleton()->get_ticks_msec();
// Wait five seconds in case more files are about to be closed.
os->sync_wait_time = 5000;
}
}
void OS_JavaScript::set_idb_available(bool p_idb_available) {
idb_available = p_idb_available;
}
bool OS_JavaScript::is_userfs_persistent() const {
return idb_available;
}
OS_JavaScript *OS_JavaScript::get_singleton() {
return static_cast<OS_JavaScript *>(OS::get_singleton());
}
void OS_JavaScript::initialize_joypads() {
}
OS_JavaScript::OS_JavaScript() {
if (AudioDriverJavaScript::is_available()) {
audio_driver_javascript = memnew(AudioDriverJavaScript);
AudioDriverManager::add_driver(audio_driver_javascript);
}
Vector<Logger *> loggers;
loggers.push_back(memnew(StdLogger));
_set_logger(memnew(CompositeLogger(loggers)));
FileAccessUnix::close_notification_func = file_access_close_callback;
}