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ScriptingSystem.cpp
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ScriptingSystem.cpp
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#include "ScriptingSystem.h"
#include <pybind11/pybind11.h>
#include <pybind11/attr.h>
#include <pybind11/stl_bind.h>
#include <pybind11/eval.h>
#if (PYBIND11_VERSION_MAJOR > 2) || (PYBIND11_VERSION_MAJOR == 2 && PYBIND11_VERSION_MINOR >= 2)
#define DR_PYBIND_HAS_EMBED_H
#endif
#ifdef DR_PYBIND_HAS_EMBED_H
#include <pybind11/embed.h>
#endif
#include "i18n.h"
#include "itextstream.h"
#include "iradiant.h"
#include "ieventmanager.h"
#include "iuimanager.h"
#include "imainframe.h"
#include "igroupdialog.h"
#include "interfaces/MathInterface.h"
#include "interfaces/RegistryInterface.h"
#include "interfaces/RadiantInterface.h"
#include "interfaces/SceneGraphInterface.h"
#include "interfaces/EClassInterface.h"
#include "interfaces/SelectionInterface.h"
#include "interfaces/BrushInterface.h"
#include "interfaces/PatchInterface.h"
#include "interfaces/EntityInterface.h"
#include "interfaces/MapInterface.h"
#include "interfaces/CommandSystemInterface.h"
#include "interfaces/GameInterface.h"
#include "interfaces/FileSystemInterface.h"
#include "interfaces/GridInterface.h"
#include "interfaces/ShaderSystemInterface.h"
#include "interfaces/ModelInterface.h"
#include "interfaces/SkinInterface.h"
#include "interfaces/SoundInterface.h"
#include "interfaces/DialogInterface.h"
#include "interfaces/SelectionSetInterface.h"
#include "interfaces/SelectionGroupInterface.h"
#include "PythonModule.h"
#include "ScriptWindow.h"
#include "SceneNodeBuffer.h"
#include <wx/frame.h>
#include "os/fs.h"
#include "os/file.h"
#include "os/path.h"
#include <functional>
#include "string/case_conv.h"
namespace script
{
ScriptingSystem::ScriptingSystem() :
_outputWriter(false, _outputBuffer),
_errorWriter(true, _errorBuffer),
_initialised(false)
{}
void ScriptingSystem::addInterface(const std::string& name, const IScriptInterfacePtr& iface) {
// Check if exists
if (interfaceExists(name)) {
rError() << "Cannot add script interface " << name
<< ", this interface is already registered." << std::endl;
return;
}
// Try to insert
_interfaces.push_back(NamedInterface(name, iface));
if (_initialised)
{
// Add the interface at once, all the others are already added
iface->registerInterface(PythonModule::GetModule(), PythonModule::GetGlobals());
}
}
bool ScriptingSystem::interfaceExists(const std::string& name)
{
// Traverse the interface list
for (const NamedInterface& i : _interfaces)
{
if (i.first == name)
{
return true;
}
}
return false;
}
void ScriptingSystem::executeScriptFile(const std::string& filename)
{
executeScriptFile(filename, false);
}
void ScriptingSystem::executeScriptFile(const std::string& filename, bool setExecuteCommandAttr)
{
try
{
std::string filePath = _scriptPath + filename;
// Prevent calling exec_file with a non-existent file, we would
// get crashes during Py_Finalize later on.
if (!os::fileOrDirExists(filePath))
{
rError() << "Error: File " << filePath << " doesn't exist." << std::endl;
return;
}
py::dict locals;
if (setExecuteCommandAttr)
{
locals["__executeCommand__"] = true;
}
// Attempt to run the specified script
py::eval_file(filePath, PythonModule::GetGlobals(), locals);
}
catch (std::invalid_argument& e)
{
rError() << "Error trying to execute file " << filename << ": " << e.what() << std::endl;
}
catch (const py::error_already_set& ex)
{
rError() << "Error while executing file: " << filename << ": " << std::endl;
rError() << ex.what() << std::endl;
}
}
ExecutionResultPtr ScriptingSystem::executeString(const std::string& scriptString)
{
ExecutionResultPtr result = std::make_shared<ExecutionResult>();
result->errorOccurred = false;
// Clear the output buffers before starting to execute
_outputBuffer.clear();
_errorBuffer.clear();
try
{
std::string fullScript = "import " + std::string(PythonModule::NAME()) + " as DR\n"
"from " + std::string(PythonModule::NAME()) + " import *\n";
fullScript.append(scriptString);
// Attempt to run the specified script
py::eval<py::eval_statements>(fullScript, PythonModule::GetGlobals());
}
catch (py::error_already_set& ex)
{
_errorBuffer.append(ex.what());
result->errorOccurred = true;
rError() << "Error executing script: " << ex.what() << std::endl;
}
result->output += _outputBuffer + "\n";
result->output += _errorBuffer + "\n";
_outputBuffer.clear();
_errorBuffer.clear();
return result;
}
void ScriptingSystem::addInterfacesToModule(py::module& mod, py::dict& globals)
{
// Add the registered interfaces
for (NamedInterface& i : _interfaces)
{
// Handle each interface in its own try/catch block
try
{
i.second->registerInterface(mod, globals);
}
catch (const py::error_already_set& ex)
{
rError() << "Error while initialising interface " << i.first << ": " << std::endl;
rError() << ex.what() << std::endl;
}
}
}
void ScriptingSystem::initialise()
{
// The finalize_interpreter() function is not available in older versions
#ifdef DR_PYBIND_HAS_EMBED_H
py::initialize_interpreter();
#else
Py_Initialize();
#endif
{
try
{
// Import the darkradiant module
py::module::import(PythonModule::NAME());
// Construct the console writer interface
PythonConsoleWriterClass consoleWriter(PythonModule::GetModule(), "PythonConsoleWriter");
consoleWriter.def(py::init<bool, std::string&>());
consoleWriter.def("write", &PythonConsoleWriter::write);
// Redirect stdio output to our local ConsoleWriter instances
py::module::import("sys").attr("stderr") = &_errorWriter;
py::module::import("sys").attr("stdout") = &_outputWriter;
// String vector is used in multiple places
py::bind_vector< std::vector<std::string> >(PythonModule::GetModule(), "StringVector");
}
catch (const py::error_already_set& ex)
{
rError() << ex.what() << std::endl;
}
}
_initialised = true;
// Start the init script
executeScriptFile("init.py");
// Search script folder for commands
reloadScripts();
// Add the scripting widget to the groupdialog
IGroupDialog::PagePtr page(new IGroupDialog::Page);
page->name = "ScriptWindow";
page->windowLabel = _("Script");
page->page = new ScriptWindow(GlobalMainFrame().getWxTopLevelWindow());
page->tabIcon = "icon_script.png";
page->tabLabel = _("Script");
page->position = IGroupDialog::Page::Position::Console - 10; // insert before console
GlobalGroupDialog().addPage(page);
}
void ScriptingSystem::runScriptFile(const cmd::ArgumentList& args)
{
// Start the test script
if (args.empty()) return;
executeScriptFile(args[0].getString());
}
void ScriptingSystem::runScriptCommand(const cmd::ArgumentList& args)
{
// Start the test script
if (args.empty()) return;
executeCommand(args[0].getString());
}
void ScriptingSystem::reloadScriptsCmd(const cmd::ArgumentList& args)
{
reloadScripts();
}
void ScriptingSystem::executeCommand(const std::string& name)
{
// Sanity check
if (!_initialised)
{
rError() << "Cannot execute script command " << name
<< ", ScriptingSystem not initialised yet." << std::endl;
return;
}
// Lookup the name
ScriptCommandMap::iterator found = _commands.find(name);
if (found == _commands.end())
{
rError() << "Couldn't find command " << name << std::endl;
return;
}
// Execute the script file behind this command
executeScriptFile(found->second->getFilename(), true);
}
void ScriptingSystem::loadCommandScript(const std::string& scriptFilename)
{
try
{
// Create a new dictionary for the initialisation routine
py::dict locals;
// Disable the flag for initialisation, just for sure
locals["__executeCommand__"] = false;
// Attempt to run the specified script
py::eval_file(_scriptPath + scriptFilename, PythonModule::GetGlobals(), locals);
std::string cmdName;
std::string cmdDisplayName;
if (locals.contains("__commandName__"))
{
cmdName = locals["__commandName__"].cast<std::string>();
}
if (locals.contains("__commandDisplayName__"))
{
cmdDisplayName = locals["__commandDisplayName__"].cast<std::string>();
}
if (!cmdName.empty())
{
if (cmdDisplayName.empty())
{
cmdDisplayName = cmdName;
}
// Successfully retrieved the command
ScriptCommandPtr cmd = std::make_shared<ScriptCommand>(cmdName, cmdDisplayName, scriptFilename);
// Try to register this named command
std::pair<ScriptCommandMap::iterator, bool> result = _commands.insert(
ScriptCommandMap::value_type(cmdName, cmd)
);
// Result.second is TRUE if the insert succeeded
if (result.second)
{
rMessage() << "Registered script file " << scriptFilename
<< " as " << cmdName << std::endl;
}
else
{
rError() << "Error in " << scriptFilename << ": Script command "
<< cmdName << " has already been registered in "
<< _commands[cmdName]->getFilename() << std::endl;
}
}
}
catch (const py::error_already_set& ex)
{
rError() << "Script file " << scriptFilename << " is not a valid command:" << std::endl;
rError() << ex.what() << std::endl;
}
}
void ScriptingSystem::reloadScripts()
{
// Release all previously allocated commands
_commands.clear();
// Initialise the search's starting point
fs::path start = fs::path(_scriptPath) / "commands/";
if (!fs::exists(start))
{
rWarning() << "Couldn't find scripts folder: " << start.string() << std::endl;
return;
}
for (fs::recursive_directory_iterator it(start);
it != fs::recursive_directory_iterator(); ++it)
{
// Get the candidate
const fs::path& candidate = *it;
if (fs::is_directory(candidate)) continue;
std::string extension = os::getExtension(candidate.string());
string::to_lower(extension);
if (extension != "py") continue;
// Script file found, construct a new command
loadCommandScript(os::getRelativePath(candidate.generic_string(), _scriptPath));
}
rMessage() << "ScriptModule: Found " << _commands.size() << " commands." << std::endl;
// Re-create the script menu
_scriptMenu.reset();
_scriptMenu = std::make_shared<ui::ScriptMenu>(_commands);
}
// RegisterableModule implementation
const std::string& ScriptingSystem::getName() const
{
static std::string _name(MODULE_SCRIPTING_SYSTEM);
return _name;
}
const StringSet& ScriptingSystem::getDependencies() const
{
static StringSet _dependencies;
if (_dependencies.empty())
{
_dependencies.insert(MODULE_RADIANT);
_dependencies.insert(MODULE_COMMANDSYSTEM);
_dependencies.insert(MODULE_UIMANAGER);
_dependencies.insert(MODULE_EVENTMANAGER);
}
return _dependencies;
}
void ScriptingSystem::initialiseModule(const ApplicationContext& ctx)
{
rMessage() << getName() << "::initialiseModule called." << std::endl;
// Subscribe to get notified as soon as Radiant is fully initialised
GlobalRadiant().signal_radiantStarted().connect(
sigc::mem_fun(this, &ScriptingSystem::initialise)
);
// Construct the script path
#if defined(POSIX) && defined(PKGLIBDIR)
_scriptPath = std::string(PKGLIBDIR) + "/scripts/";
#else
_scriptPath = ctx.getRuntimeDataPath() + "scripts/";
#endif
// When Python asks for the object, let's register our interfaces to the py::module
PythonModule::RegisterToPython(
std::bind(&ScriptingSystem::addInterfacesToModule, this, std::placeholders::_1, std::placeholders::_2));
// Add the built-in interfaces (the order is important, as we don't have dependency-resolution yet)
addInterface("Math", std::make_shared<MathInterface>());
addInterface("GameManager", std::make_shared<GameInterface>());
addInterface("CommandSystem", std::make_shared<CommandSystemInterface>());
addInterface("SceneGraph", std::make_shared<SceneGraphInterface>());
addInterface("GlobalRegistry", std::make_shared<RegistryInterface>());
addInterface("GlobalEntityClassManager", std::make_shared<EClassManagerInterface>());
addInterface("GlobalSelectionSystem", std::make_shared<SelectionInterface>());
addInterface("Brush", std::make_shared<BrushInterface>());
addInterface("Patch", std::make_shared<PatchInterface>());
addInterface("Entity", std::make_shared<EntityInterface>());
addInterface("Radiant", std::make_shared<RadiantInterface>());
addInterface("Map", std::make_shared<MapInterface>());
addInterface("FileSystem", std::make_shared<FileSystemInterface>());
addInterface("Grid", std::make_shared<GridInterface>());
addInterface("ShaderSystem", std::make_shared<ShaderSystemInterface>());
addInterface("Model", std::make_shared<ModelInterface>());
addInterface("ModelSkinCacheInterface", std::make_shared<ModelSkinCacheInterface>());
addInterface("SoundManager", std::make_shared<SoundManagerInterface>());
addInterface("DialogInterface", std::make_shared<DialogManagerInterface>());
addInterface("SelectionSetInterface", std::make_shared<SelectionSetInterface>());
addInterface("SelectionGroupInterface", std::make_shared<SelectionGroupInterface>());
GlobalCommandSystem().addCommand(
"RunScript",
std::bind(&ScriptingSystem::runScriptFile, this, std::placeholders::_1),
{ cmd::ARGTYPE_STRING }
);
GlobalCommandSystem().addCommand(
"ReloadScripts",
std::bind(&ScriptingSystem::reloadScriptsCmd, this, std::placeholders::_1)
);
GlobalCommandSystem().addCommand(
"RunScriptCommand",
std::bind(&ScriptingSystem::runScriptCommand, this, std::placeholders::_1),
{ cmd::ARGTYPE_STRING }
);
// Bind the reloadscripts command to the menu
GlobalEventManager().addCommand("ReloadScripts", "ReloadScripts");
// Add the menu item
IMenuManager& mm = GlobalUIManager().getMenuManager();
mm.insert("main/file/refreshShaders", // menu location path
"ReloadScripts", // name
ui::menuItem, // type
_("Reload Scripts"), // caption
"", // icon
"ReloadScripts"); // event name
SceneNodeBuffer::Instance().clear();
}
void ScriptingSystem::shutdownModule()
{
rMessage() << getName() << "::shutdownModule called." << std::endl;
_scriptMenu.reset();
_initialised = false;
// Clear the buffer so that nodes finally get destructed
SceneNodeBuffer::Instance().clear();
_commands.clear();
_scriptPath.clear();
// Free all interfaces
_interfaces.clear();
PythonModule::Clear();
// The finalize_interpreter() function is not available in older versions
#ifdef DR_PYBIND_HAS_EMBED_H
py::finalize_interpreter();
#else
Py_Finalize();
#endif
}
} // namespace script