Textractor_test/extensions/lua.cpp

134 lines
3.8 KiB
C++

#include "qtcommon.h"
#include "extension.h"
#include "util.h"
#include <fstream>
#include <QPlainTextEdit>
extern const char* LUA_INTRO;
extern const char* LOAD_LUA_SCRIPT;
extern const wchar_t* LUA_ERROR;
constexpr auto LUA_SAVE_FILE = u8"Textractor.lua";
extern "C" // Lua library
{
enum LuaType { LUA_TNIL, LUA_TBOOLEAN, LUA_TLIGHTUSERDATA, LUA_TNUMBER, LUA_TSTRING, LUA_TTABLE, LUA_TFUNCTION, LUA_TUSERDATA, LUA_TTHREAD };
enum LuaStatus { LUA_OK, LUA_YIELD, LUA_ERRRUN, LUA_ERRSYNTAX, LUA_ERRMEM, LUA_ERRGCMM, LUA_ERRERR };
struct lua_State;
lua_State* luaL_newstate();
void luaL_openlibs(lua_State*);
void lua_close(lua_State*);
LuaStatus luaL_loadstring(lua_State*, const char* str);
const char* lua_tolstring(lua_State*, int index, size_t* size);
const char* lua_pushstring(lua_State*, const char* str);
void lua_pushinteger(lua_State*, int64_t n);
void lua_createtable(lua_State*, int narr, int nrec);
void lua_settable(lua_State*, int index);
void lua_settop(lua_State*, int index);
LuaType lua_getglobal(lua_State*, const char* name);
LuaStatus lua_pcallk(lua_State*, int nargs, int nresults, int msgh, void*, void*);
}
bool luaL_dostring(lua_State* L, const char* str)
{
return luaL_loadstring(L, str) || lua_pcallk(L, 0, -1, 0, NULL, NULL);
}
bool logErrors = true;
Synchronized<std::string> script;
std::atomic<int> revCount = 0;
class Window : public QMainWindow
{
public:
Window()
{
connect(&loadButton, &QPushButton::clicked, this, &Window::LoadScript);
if (scriptEditor.toPlainText().isEmpty()) scriptEditor.setPlainText(LUA_INTRO);
layout.addWidget(&scriptEditor);
layout.addWidget(&loadButton);
resize(800, 600);
setCentralWidget(&centralWidget);
setWindowTitle("Lua");
QMetaObject::invokeMethod(this, &QWidget::show, Qt::QueuedConnection);
}
~Window()
{
Save();
}
private:
void LoadScript()
{
revCount += 1;
script->assign(scriptEditor.toPlainText().toUtf8());
Save();
}
void Save()
{
auto script = scriptEditor.toPlainText().toUtf8();
std::ofstream(LUA_SAVE_FILE, std::ios::out | std::ios::trunc).write(script, script.size());
}
QWidget centralWidget{ this };
QHBoxLayout layout{ &centralWidget };
QPlainTextEdit scriptEditor{ S(std::string(std::istreambuf_iterator<char>(std::ifstream(LUA_SAVE_FILE, std::ios::in)), {})), &centralWidget };
QPushButton loadButton{ LOAD_LUA_SCRIPT, &centralWidget };
} window;
bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo)
{
thread_local static struct { std::unique_ptr<lua_State, Functor<lua_close>> L{ luaL_newstate() }; operator lua_State*() { return L.get(); } } L;
thread_local static auto _ = (luaL_openlibs(L), luaL_dostring(L, "function ProcessSentence() end"));
thread_local static int revCount = 0;
if (::revCount > revCount)
{
revCount = ::revCount;
luaL_dostring(L, "ProcessSentence = nil");
if (luaL_dostring(L, script->c_str()) != LUA_OK)
{
sentence += L"\n" + FormatString(LUA_ERROR, StringToWideString(lua_tolstring(L, 1, nullptr)));
lua_settop(L, 0);
return logErrors;
}
}
if (lua_getglobal(L, "ProcessSentence") != LUA_TFUNCTION)
{
sentence += L"\n" + FormatString(LUA_ERROR, L"ProcessSentence is not a function");
lua_settop(L, 0);
return logErrors;
}
lua_pushstring(L, WideStringToString(sentence).c_str());
lua_createtable(L, 0, 0);
for (auto info = sentenceInfo.infoArray; info->name; ++info)
{
lua_pushstring(L, info->name);
lua_pushinteger(L, info->value);
lua_settable(L, 3);
}
if (lua_pcallk(L, 2, 1, 0, NULL, NULL) != LUA_OK)
{
sentence += L"\n" + FormatString(LUA_ERROR, StringToWideString(lua_tolstring(L, 1, nullptr)));
lua_settop(L, 0);
return logErrors;
}
if (const char* newSentence = lua_tolstring(L, 1, nullptr))
{
sentence = StringToWideString(newSentence);
lua_settop(L, 0);
return true;
}
lua_settop(L, 0);
return false;
}