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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_VALUE_HXX
#define RSPAMD_CSS_VALUE_HXX
#include <string>
#include <variant>
#include <optional>
#include <vector>
#include <iosfwd>
#include "parse_error.hxx"
#include "css_parser.hxx"
#include "contrib/expected/expected.hpp"
namespace rspamd::css {
struct alignas(int) css_color {
std::uint8_t r;
std::uint8_t g;
std::uint8_t b;
std::uint8_t alpha;
css_color(std::uint8_t _r, std::uint8_t _g, std::uint8_t _b, std::uint8_t _alpha = 255) :
r(_r), g(_g), b(_b), alpha(_alpha) {}
css_color() = default;
constexpr auto to_number() const -> std::uint32_t {
return (std::uint32_t)alpha << 24 |
(std::uint32_t)r << 16 |
(std::uint32_t)g << 8 |
(std::uint32_t)b << 0;
}
constexpr auto to_rgb() const -> std::uint32_t {
return (std::uint32_t)r << 16 |
(std::uint32_t)g << 8 |
(std::uint32_t)b << 0;
}
friend bool operator==(const css_color& l, const css_color& r) {
return (memcmp(&l, &r, sizeof(css_color)) == 0);
}
static auto white() -> css_color {
return css_color{255, 255, 255};
}
static auto black() -> css_color {
return css_color{0, 0, 0};
}
};
struct css_dimension {
float dim;
bool is_percent;
};
/*
* Simple enum class for display stuff
*/
enum class css_display_value : std::uint8_t {
DISPLAY_INLINE,
DISPLAY_BLOCK,
DISPLAY_TABLE_ROW,
DISPLAY_HIDDEN
};
/*
* Value handler, uses std::variant instead of polymorphic classes for now
* for simplicity
*/
struct css_value {
std::variant<css_color,
float,
css_display_value,
css_dimension,
std::monostate> value;
css_value() {}
css_value(const css_color &color) :
value(color) {}
css_value(float num) :
value(num) {}
css_value(css_dimension dim) :
value(dim) {}
css_value(css_display_value d) :
value(d) {}
auto to_color(void) const -> std::optional<css_color> {
return extract_value_maybe<css_color>();
}
auto to_number(void) const -> std::optional<float> {
return extract_value_maybe<float>();
}
auto to_dimension(void) const -> std::optional<css_dimension> {
return extract_value_maybe<css_dimension>();
}
auto to_display(void) const -> std::optional<css_display_value> {
return extract_value_maybe<css_display_value>();
}
auto is_valid(void) const -> bool {
return !(std::holds_alternative<std::monostate>(value));
}
auto debug_str() const -> std::string;
static auto maybe_color_from_string(const std::string_view &input)
-> std::optional<css_value>;
static auto maybe_color_from_hex(const std::string_view &input)
-> std::optional<css_value>;
static auto maybe_color_from_function(const css_consumed_block::css_function_block &func)
-> std::optional<css_value>;
static auto maybe_dimension_from_number(const css_parser_token &tok)
-> std::optional<css_value>;
static auto maybe_display_from_string(const std::string_view &input)
-> std::optional<css_value>;
private:
template<typename T>
auto extract_value_maybe(void) const -> std::optional<T> {
if (std::holds_alternative<T>(value)) {
return std::get<T>(value);
}
return std::nullopt;
}
};
}
#endif //RSPAMD_CSS_VALUE_HXX
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