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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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