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#include <QtCore>
#include <lua.hpp>
extern "C" {
#include <luv.h>
}
#include "AsyncEventLoop.hpp"
#include "LuaRuntime.hpp"
LuaRuntime::LuaRuntime() {
state = luaL_newstate();
luaL_openlibs(state);
preserve_top(state, { init_web_lib(); })
}
void LuaRuntime::start_event_loop() {
if (event_loop != nullptr)
stop_event_loop();
// Init event loop
event_loop = new AsyncEventLoop();
// Load `uv` (luv)
luv_set_loop(state, event_loop->get_uv_loop());
luaopen_luv(state);
lua_setglobal(state, uv_global_name);
}
void LuaRuntime::stop_event_loop() {
if (event_loop != nullptr) {
delete event_loop;
event_loop = nullptr;
}
// Clear the uv global
lua_pushnil(state);
lua_setglobal(state, uv_global_name);
lua_gc(state, LUA_GCCOLLECT, 0);
}
void LuaRuntime::evaluate(const QString &code) {
queue_task([this, code]() {
preserve_top(state, {
if (luaL_dostring(state, code.toStdString().c_str()) != LUA_OK) {
const char *value = lua_tostring(state, -1);
qDebug() << "Lua Error: " << value;
emit evaluation_failed(value);
} else {
const QVariant value = get_lua_value(-1);
qDebug() << "result: " << value;
emit evaluation_completed(value);
}
})
});
}
QVariant LuaRuntime::evaluate_sync(const QString &code) {
luaL_dostring(state, code.toStdString().c_str());
return get_lua_value(-1); // TODO: error handling
}
QVariant LuaRuntime::get_lua_value(int idx, QVariant default_value) {
if (lua_isnoneornil(state, idx))
return default_value;
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);
return lua_tostring(state, idx);
}
int LuaRuntime::lua_on_url_open(lua_State *state) {
const char *url = luaL_optstring(state, 1, "");
auto *runtime = LuaRuntime::instance();
emit runtime->url_opened(url, OpenType::OpenUrl);
return 1;
}
int LuaRuntime::lua_on_url_tab_open(lua_State *state) {
const char *url = luaL_optstring(state, 1, "");
auto *runtime = LuaRuntime::instance();
emit runtime->url_opened(url, OpenType::OpenUrlInTab);
return 1;
}
int LuaRuntime::lua_add_keymap(lua_State *state) {
const char *mode = lua_tostring(state, 1);
const char *keyseq = lua_tostring(state, 2);
lua_pushvalue(state, 3);
const int function_ref = luaL_ref(state, LUA_REGISTRYINDEX);
auto action = [state, function_ref]() {
preserve_top(state, {
lua_rawgeti(state, LUA_REGISTRYINDEX, function_ref);
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->keymap_add_requested(mode, keyseq, action);
return 1;
}
void LuaRuntime::load_file(const QString &path) {
queue_task([this, path]() {
preserve_top(state, {
qDebug() << "Loading: " << path;
if (luaL_dofile(state, path.toStdString().c_str()) != LUA_OK) {
qDebug() << "Load file error:" << lua_tostring(state, -1);
}
})
});
}
void LuaRuntime::init_web_lib() {
// NOLINTBEGIN(modernize-avoid-c-arrays)
// web
luaL_Reg weblib[] = {
{"open", &LuaRuntime::lua_on_url_open},
{"tabopen", &LuaRuntime::lua_on_url_tab_open},
{nullptr, nullptr},
};
luaL_newlib(state, weblib); // NOLINT(readability-math-missing-parentheses)
lua_setglobal(state, web_global_name);
// web.keymap
lua_getglobal(state, web_global_name);
luaL_Reg keymaplib[] = {
{"set", &LuaRuntime::lua_add_keymap},
};
luaL_newlib(state, keymaplib); // NOLINT(readability-math-missing-parentheses)
lua_setfield(state, -2, "keymap");
// lua_pop(state, 1);
luaL_Reg tabslib[] = {
{"current", &LuaRuntime::lua_get_current_tab_id},
};
luaL_newlib(state, tabslib); // NOLINT(readability-math-missing-parentheses)
lua_setfield(state, -2, "tabs");
luaL_Reg historylib[] = {
{"back", &LuaRuntime::lua_history_back},
{"forward", &LuaRuntime::lua_history_forward},
};
luaL_newlib(state, // NOLINT(readability-math-missing-parentheses)
historylib);
lua_setfield(state, -2, "history");
// NOLINTEND(modernize-avoid-c-arrays)
}
int LuaRuntime::lua_get_current_tab_id(lua_State *state) {
auto *runtime = LuaRuntime::instance();
auto tab_id = runtime->fetch_current_tab_id();
lua_pushinteger(state, tab_id);
return 1;
}
int LuaRuntime::lua_history_back(lua_State *state) {
auto *runtime = LuaRuntime::instance();
qsizetype history_index =
lua_isnoneornil(state, 1) ? 1 : lua_tointeger(state, 1);
qsizetype tab_id;
if (lua_isnoneornil(state, 2)) {
tab_id = runtime->fetch_current_tab_id();
} else {
tab_id = lua_tointeger(state, 2);
}
emit runtime->history_back_requested(tab_id, history_index);
return 1;
}
int LuaRuntime::lua_history_forward(lua_State *state) {
auto *runtime = LuaRuntime::instance();
qsizetype history_index =
lua_isnoneornil(state, 1) ? 1 : lua_tointeger(state, 1);
qsizetype tab_id;
if (lua_isnoneornil(state, 2)) {
tab_id = runtime->fetch_current_tab_id();
} else {
tab_id = lua_tointeger(state, 2);
}
emit runtime->history_forward_requested(tab_id, history_index);
return 1;
}
LuaRuntime::~LuaRuntime() {
stop_event_loop();
lua_close(state);
state = nullptr;
}
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