Refactor lua runtime api

1 files changed, 205 insertions, 0 deletions

diff --git a/src/LuaRuntimeApi.hpp b/src/LuaRuntimeApi.hpp
new file mode 100644
index 0000000..809b579
--- /dev/null
+++ b/src/LuaRuntimeApi.hpp
@@ -0,0 +1,205 @@
+#pragma once
+
+#include <lua.hpp>
+
+#include "LuaRuntime.hpp"
+#include "WindowActionRouter.hpp"
+
+int lua_api_open_url(lua_State *state) {
+  const char *url = lua_tostring(state, 1);
+  WebViewId view_id = lua_isnoneornil(state, 2) ? 0 : lua_tointeger(state, 2);
+  auto &runtime = LuaRuntime::instance();
+  emit runtime.url_opened(url, OpenType::OpenUrl, view_id);
+  return 1;
+}
+
+int lua_api_view_create(lua_State *state) {
+  const char *url = luaL_optstring(state, 1, "");
+  auto &runtime = LuaRuntime::instance();
+  emit runtime.url_opened(url, OpenType::OpenUrlInView, 0);
+  return 1;
+}
+
+int lua_api_config_set(lua_State *state) {
+  const char *key = lua_tostring(state, 1);
+  auto &runtime = LuaRuntime::instance();
+  QVariant value = LuaRuntime::get_lua_value(runtime.get_state(), 2, "");
+  emit runtime.config_updated(key, value);
+  return 1;
+}
+
+int lua_api_config_get(lua_State *state) {
+  const char *key = lua_tostring(state, 1);
+  auto &router = WindowActionRouter::instance();
+  auto value = router.fetch_config_value(key);
+
+  if (value.typeId() == QMetaType::QString)
+    lua_pushstring(state, value.toString().toStdString().c_str());
+  else if (value.typeId() == QMetaType::Int)
+    lua_pushinteger(state, value.toInt());
+  else if (value.typeId() == QMetaType::Double)
+    lua_pushnumber(state, value.toDouble());
+  else
+    lua_pushnil(state);
+
+  return 1;
+}
+
+int lua_api_keymap_set(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_added(mode, keyseq, action);
+
+  return 1;
+}
+
+int lua_api_view_current(lua_State *state) {
+  auto &router = WindowActionRouter::instance();
+  auto view_id = router.fetch_current_view_id();
+  lua_pushinteger(state, view_id);
+  return 1;
+}
+
+int lua_view_list(lua_State *state) {
+  auto &router = WindowActionRouter::instance();
+  auto views = router.fetch_webview_data_list();
+  lua_newtable(state);
+
+  int index = 1; // 1-indexed
+  for (auto &view : views) {
+    lua_newtable(state);
+
+    lua_pushstring(state, "id");
+    lua_pushinteger(state, view.id);
+    lua_settable(state, -3);
+
+    lua_pushstring(state, "url");
+    lua_pushstring(state, view.url.toStdString().c_str());
+    lua_settable(state, -3);
+
+    lua_pushstring(state, "title");
+    lua_pushstring(state, view.title.toStdString().c_str());
+    lua_settable(state, -3);
+
+    lua_rawseti(state, -2, index);
+    index++;
+  }
+
+  return 1;
+}
+
+int lua_history_back(lua_State *state) {
+  auto &runtime = LuaRuntime::instance();
+
+  qsizetype history_index = lua_isnoneornil(state, 1) ? 1 : lua_tointeger(state, 1);
+
+  WebViewId view_id = lua_isnoneornil(state, 2) ? 0 : lua_tointeger(state, 2);
+
+  emit runtime.history_back_requested(view_id, history_index);
+  return 1;
+}
+
+int lua_history_forward(lua_State *state) {
+  auto &runtime = LuaRuntime::instance();
+
+  qsizetype history_index = lua_isnoneornil(state, 1) ? 1 : lua_tointeger(state, 1);
+
+  WebViewId view_id = lua_isnoneornil(state, 2) ? 0 : lua_tointeger(state, 2);
+
+  emit runtime.history_forward_requested(view_id, history_index);
+  return 1;
+}
+
+int lua_view_close(lua_State *state) {
+  auto &runtime = LuaRuntime::instance();
+
+  WebViewId view_id = lua_isnoneornil(state, 1) ? 0 : lua_tointeger(state, 1);
+
+  emit runtime.webview_closed(view_id);
+  return 1;
+}
+
+int lua_view_select(lua_State *state) {
+  if (lua_isnoneornil(state, 1))
+    return 1; // TODO: return nil (for others too)
+
+  auto &runtime = LuaRuntime::instance();
+  WebViewId view_id = lua_tointeger(state, 1);
+  emit runtime.webview_selected(view_id);
+  return 1;
+}
+
+int lua_event_register(lua_State *state) {
+  EventHandlerRequest event;
+  auto top = lua_gettop(state);
+
+  lua_getfield(state, 1, "events");
+  auto event_names = LuaRuntime::lua_tostringlist(state);
+
+  event.event_names.swap(event_names);
+  if (event.event_names.size() == 0) {
+    lua_settop(state, top);
+    lua_pushboolean(state, false);
+    return 1;
+  }
+
+  lua_getfield(state, 1, "patterns");
+  auto patterns = LuaRuntime::lua_tostringlist(state);
+  event.patterns.swap(patterns);
+
+  lua_getfield(state, 1, "callback");
+  if (!lua_isfunction(state, -1)) {
+    lua_settop(state, top);
+    lua_pushboolean(state, false);
+    return 1;
+  }
+
+  const int function_ref = luaL_ref(state, LUA_REGISTRYINDEX);
+  event.function_ref = function_ref;
+  // TODO: Delete ref on clear callback
+  event.handler = [state, function_ref](BrowserEvent *event) {
+    preserve_top(state, {
+      lua_rawgeti(state, LUA_REGISTRYINDEX, function_ref);
+      event->lua_push(state);
+      lua_pcall(state, 1, 0, 0);
+    })
+  };
+
+  WindowActionRouter::instance().register_event(event);
+
+  lua_settop(state, top);
+  lua_pushboolean(state, true);
+  return 1;
+}
+
+// NOLINTNEXTLINE
+static luaL_Reg internals_api[] = {
+    luaL_Reg{"event_add_listener", &lua_event_register},
+    luaL_Reg{"config_set", &lua_api_config_set},
+    luaL_Reg{"config_get", &lua_api_config_get},
+    luaL_Reg{"keymap_set", &lua_api_keymap_set},
+    luaL_Reg{"view_close", &lua_view_close},
+    luaL_Reg{"view_create", &lua_api_view_create},
+    luaL_Reg{"view_current", &lua_api_view_current},
+    luaL_Reg{"view_list", &lua_view_list},
+    luaL_Reg{"view_select", &lua_view_select},
+    luaL_Reg{"view_set_url", &lua_api_open_url},
+    luaL_Reg{"history_back", &lua_history_back},
+    luaL_Reg{"history_forward", &lua_history_forward},
+    luaL_Reg{nullptr, nullptr},
+};