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/*-
* Copyright 2021 Vsevolod Stakhov
*
* 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
*
* http://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.
*/
#ifndef RSPAMD_CSS_PROPERTY_HXX
#define RSPAMD_CSS_PROPERTY_HXX
#include <string>
#include "parse_error.hxx"
#include "contrib/expected/expected.hpp"
namespace rspamd::css {
/*
* To be extended with properties that are interesting from the email
* point of view
*/
enum class css_property_type {
PROPERTY_FONT,
PROPERTY_COLOR,
PROPERTY_BGCOLOR,
PROPERTY_BACKGROUND,
PROPERTY_HEIGHT,
PROPERTY_WIDTH,
PROPERTY_DISPLAY,
PROPERTY_VISIBILITY,
};
struct css_property {
css_property_type type;
static tl::expected<css_property,css_parse_error> from_bytes (const char *input,
size_t inlen);
};
}
/* Make properties hashable */
namespace std {
template<>
class hash<rspamd::css::css_property> {
public:
/* Mix bits to provide slightly better distribution but being constexpr */
constexpr size_t operator() (const rspamd::css::css_property &prop) const {
std::size_t key = 0xdeadbeef ^static_cast<std::size_t>(prop.type);
key = (~key) + (key << 21);
key = key ^ (key >> 24);
key = (key + (key << 3)) + (key << 8);
key = key ^ (key >> 14);
key = (key + (key << 2)) + (key << 4);
key = key ^ (key >> 28);
key = key + (key << 31);
return key;
}
};
}
#endif //RSPAMD_CSS_PROPERTY_HXX
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