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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.
*/
#pragma once
#ifndef RSPAMD_CSS_PROPERTY_HXX
#define RSPAMD_CSS_PROPERTY_HXX
#include <string>
#include "css_tokeniser.hxx"
#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 : std::uint16_t {
PROPERTY_FONT = 0,
PROPERTY_FONT_COLOR,
PROPERTY_FONT_SIZE,
PROPERTY_COLOR,
PROPERTY_BGCOLOR,
PROPERTY_BACKGROUND,
PROPERTY_HEIGHT,
PROPERTY_WIDTH,
PROPERTY_DISPLAY,
PROPERTY_VISIBILITY,
PROPERTY_OPACITY,
PROPERTY_NYI,
};
enum class css_property_flag : std::uint16_t {
FLAG_NORMAL,
FLAG_IMPORTANT,
FLAG_NOT_IMPORTANT
};
struct alignas(int) css_property {
css_property_type type;
css_property_flag flag;
css_property(css_property_type t, css_property_flag fl = css_property_flag::FLAG_NORMAL)
: type(t), flag(fl)
{
}
static tl::expected<css_property, css_parse_error> from_token(
const css_parser_token &tok);
constexpr auto to_string(void) const -> const char *
{
const char *ret = "nyi";
switch (type) {
case css_property_type::PROPERTY_FONT:
ret = "font";
break;
case css_property_type::PROPERTY_FONT_COLOR:
ret = "font-color";
break;
case css_property_type::PROPERTY_FONT_SIZE:
ret = "font-size";
break;
case css_property_type::PROPERTY_COLOR:
ret = "color";
break;
case css_property_type::PROPERTY_BGCOLOR:
ret = "bgcolor";
break;
case css_property_type::PROPERTY_BACKGROUND:
ret = "background";
break;
case css_property_type::PROPERTY_HEIGHT:
ret = "height";
break;
case css_property_type::PROPERTY_WIDTH:
ret = "width";
break;
case css_property_type::PROPERTY_DISPLAY:
ret = "display";
break;
case css_property_type::PROPERTY_VISIBILITY:
ret = "visibility";
break;
case css_property_type::PROPERTY_OPACITY:
ret = "opacity";
break;
default:
break;
}
return ret;
}
/* Helpers to define which values are valid for which properties */
auto is_color(void) const -> bool
{
return type == css_property_type::PROPERTY_COLOR ||
type == css_property_type::PROPERTY_BACKGROUND ||
type == css_property_type::PROPERTY_BGCOLOR ||
type == css_property_type::PROPERTY_FONT_COLOR ||
type == css_property_type::PROPERTY_FONT;
}
auto is_dimension(void) const -> bool
{
return type == css_property_type::PROPERTY_HEIGHT ||
type == css_property_type::PROPERTY_WIDTH ||
type == css_property_type::PROPERTY_FONT_SIZE ||
type == css_property_type::PROPERTY_FONT;
}
auto is_normal_number(void) const -> bool
{
return type == css_property_type::PROPERTY_OPACITY;
}
auto is_display(void) const -> bool
{
return type == css_property_type::PROPERTY_DISPLAY;
}
auto is_visibility(void) const -> bool
{
return type == css_property_type::PROPERTY_VISIBILITY;
}
auto operator==(const css_property &other) const
{
return type == other.type;
}
};
}// namespace rspamd::css
/* Make properties hashable */
namespace std {
template<>
class hash<rspamd::css::css_property> {
public:
using is_avalanching = void;
/* 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;
}
};
}// namespace std
#endif//RSPAMD_CSS_PROPERTY_HXX
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