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Diffstat (limited to 'src/libserver/css/css_property.hxx')
| -rw-r--r-- | src/libserver/css/css_property.hxx | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/libserver/css/css_property.hxx b/src/libserver/css/css_property.hxx new file mode 100644 index 0000000..9661222 --- /dev/null +++ b/src/libserver/css/css_property.hxx @@ -0,0 +1,172 @@ +/*- + * 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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