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108 lines
2.2 KiB
108 lines
2.2 KiB
/*
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* Copyright 2023 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#include "ui/screen_lua.hpp"
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#include "core/lv_obj_tree.h"
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#include "lua.h"
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#include "lua.hpp"
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#include "lua/property.hpp"
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#include "ui/themes.hpp"
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#include "lua/lua_thread.hpp"
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#include "luavgl.h"
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namespace ui {
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namespace screens {
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Lua::Lua() : s_(nullptr), obj_ref_() {
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themes::Theme::instance()->ApplyStyle(root_, "root");
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}
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Lua::~Lua() {
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if (s_ && obj_ref_) {
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luaL_unref(s_, LUA_REGISTRYINDEX, *obj_ref_);
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}
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}
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auto Lua::onShown() -> void {
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callMethod("onShown");
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forEachBinding([&](lua::Binding* b) { b->active = true; });
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}
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auto Lua::onHidden() -> void {
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callMethod("onHidden");
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forEachBinding([&](lua::Binding* b) { b->active = false; });
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}
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auto Lua::canPop() -> bool {
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if (!s_ || !obj_ref_) {
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return true;
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}
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lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
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lua_pushliteral(s_, "canPop");
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if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
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// If we got a callback instead of a value, then invoke it to turn it into
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// value.
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lua_pushvalue(s_, -2);
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lua::CallProtected(s_, 1, 1);
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}
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bool ret = lua_toboolean(s_, -1);
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lua_pop(s_, 2);
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return ret;
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}
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auto Lua::SetObjRef(lua_State* s) -> void {
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assert(s_ == nullptr);
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s_ = s;
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obj_ref_ = luaL_ref(s, LUA_REGISTRYINDEX);
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}
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auto Lua::callMethod(std::string name) -> void {
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if (!s_ || !obj_ref_) {
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return;
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}
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lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
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lua_pushlstring(s_, name.data(), name.size());
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if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
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lua_pushvalue(s_, -2);
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lua::CallProtected(s_, 1, 0);
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} else {
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lua_pop(s_, 1);
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}
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lua_pop(s_, 1);
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}
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auto Lua::forEachBinding(std::function<void(lua::Binding*)> fn) -> void {
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if (!s_ || !obj_ref_) {
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return;
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}
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lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
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lua_pushliteral(s_, "bindings");
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if (lua_gettable(s_, -2) != LUA_TTABLE) {
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lua_pop(s_, 2);
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return;
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}
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lua_pushnil(s_);
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while (lua_next(s_, -2) != 0) {
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lua::Binding* b = lua::Binding::get(s_, -1);
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if (b) {
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std::invoke(fn, b);
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}
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lua_pop(s_, 1);
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}
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lua_pop(s_, 2);
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}
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} // namespace screens
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} // namespace ui
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