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#include <QtCore>
#include <lua.hpp>
extern "C" {
#include <luv.h>
}
#include "AsyncEventLoop.hpp"
#include "LuaRuntime.hpp"
const char *uv_global_name = "uv";
const char *web_global_name = "web";
LuaRuntime::LuaRuntime() {
state = luaL_newstate();
luaL_openlibs(state);
preserveTop(state, { initWebLib(); })
}
void LuaRuntime::startEventLoop() {
if (eventLoop != nullptr)
stopEventLoop();
// Init event loop
eventLoop = new AsyncEventLoop();
// Load `uv` (luv)
luv_set_loop(state, eventLoop->getUVLoop());
luaopen_luv(state);
lua_setglobal(state, uv_global_name);
}
void LuaRuntime::stopEventLoop() {
if (eventLoop != nullptr) {
delete eventLoop;
eventLoop = nullptr;
}
// Clear the uv global
lua_pushnil(state);
lua_setglobal(state, uv_global_name);
lua_gc(state, LUA_GCCOLLECT, 0);
}
void LuaRuntime::evaluate(QString code) {
eventLoop->queueTask([this, code]() {
preserveTop(state, {
if (luaL_dostring(state, code.toStdString().c_str()) != LUA_OK) {
const char *value = lua_tostring(state, -1);
qDebug() << "Lua Error: " << value;
emit evaluationFailed(value);
} else {
QVariant value = getLuaValue(-1);
qDebug() << "result: " << value;
emit evaluationCompleted(value);
}
})
});
}
QVariant LuaRuntime::evaluateSync(QString code) {
luaL_dostring(state, code.toStdString().c_str());
return getLuaValue(-1); // TODO: error handling
}
QVariant LuaRuntime::getLuaValue(int idx) {
if (lua_isstring(state, idx))
return lua_tostring(state, idx);
if (lua_isnumber(state, idx))
return lua_tonumber(state, idx);
if (lua_isboolean(state, idx))
return lua_toboolean(state, idx);
if (lua_isnil(state, idx))
return 0; // TODO: nil representation
return lua_tostring(state, idx);
}
int LuaRuntime::lua_onUrlOpen(lua_State *state) {
const char *url = luaL_optstring(state, 1, "");
auto runtime = LuaRuntime::instance();
emit runtime->urlOpened(url, OpenType::OpenUrl);
return 1;
}
int LuaRuntime::lua_onUrlTabOpen(lua_State *state) {
const char *url = luaL_optstring(state, 1, "");
auto runtime = LuaRuntime::instance();
emit runtime->urlOpened(url, OpenType::OpenUrlInTab);
return 1;
}
int LuaRuntime::lua_addKeymap(lua_State *state) {
const char *mode = lua_tostring(state, 1);
const char *keyseq = lua_tostring(state, 2);
lua_pushvalue(state, 3);
int functionRef = luaL_ref(state, LUA_REGISTRYINDEX);
auto action = [state, functionRef]() {
preserveTop(state, {
lua_rawgeti(state, LUA_REGISTRYINDEX, functionRef);
if (lua_pcall(state, 0, 0, 0) != LUA_OK) {
const char *error = lua_tostring(state, -1);
qDebug() << "Error calling Lua function:" << error;
}
})
};
// TODO: Cleanup function ref on after keymap clear
auto runtime = LuaRuntime::instance();
emit runtime->keymapAddRequested(mode, keyseq, action);
return 1;
}
void LuaRuntime::loadFile(QString path) {
queueTask([this, path]() {
preserveTop(state, {
qDebug() << "Loading: " << path;
if (luaL_dofile(state, path.toStdString().c_str()) != LUA_OK) {
qDebug() << "Load file error:" << lua_tostring(state, -1);
}
})
});
}
void LuaRuntime::initWebLib() {
// web
luaL_Reg weblib[] = {
{"open", &LuaRuntime::lua_onUrlOpen},
{"tabopen", &LuaRuntime::lua_onUrlTabOpen},
{nullptr, nullptr},
};
luaL_newlib(state, weblib);
lua_setglobal(state, web_global_name);
// web.keymap
lua_getglobal(state, web_global_name);
luaL_Reg keymaplib[] = {
{"set", &LuaRuntime::lua_addKeymap},
};
luaL_newlib(state, keymaplib);
lua_setfield(state, -2, "keymap");
// lua_pop(state, 1);
}
LuaRuntime::~LuaRuntime() {
stopEventLoop();
lua_close(state);
state = nullptr;
}
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