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// Copyright 2021, 2022 Benjamin Barenblat
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include "src/x/event.h"
#include <stdint.h>
#include <string.h>
#include <xcb/xcb.h>
#include <algorithm>
#include <array>
#include <stdexcept>
#include "third_party/abseil/absl/types/variant.h"
namespace x {
namespace {
constexpr uint8_t kXcbResponseTypeMask = 0x7f;
} // namespace
Event FromXcbGenericEvent(const xcb_generic_event_t& event) noexcept {
switch (event.response_type & kXcbResponseTypeMask) {
case XCB_EXPOSE:
return ExposeEvent(event);
case XCB_CONFIGURE_NOTIFY:
return ConfigureNotifyEvent(event);
case XCB_CLIENT_MESSAGE:
return ClientMessageEvent(event);
default:
return UnknownEvent(event);
}
}
std::array<char, 32> SerializeEvent(const Event& event) noexcept {
std::array<char, 32> raw = {};
absl::visit(
[&](auto&& ev) {
const auto& xcb_ev = ev.AsXcbEvent();
memcpy(raw.data(), &xcb_ev, std::min(raw.size(), sizeof(xcb_ev)));
},
event);
return raw;
}
} // namespace x
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