xlnt/source/styles/color.cpp

316 lines
5.9 KiB
C++

// Copyright (c) 2014-2018 Thomas Fussell
// Copyright (c) 2010-2015 openpyxl
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE
//
// @license: http://www.opensource.org/licenses/mit-license.php
// @author: see AUTHORS file
#include <cmath>
#include <cstdlib>
#include <xlnt/styles/color.hpp>
#include <xlnt/utils/exceptions.hpp>
namespace {
std::array<std::uint8_t, 4> decode_hex_string(const std::string &hex_string)
{
auto x = std::strtoul(hex_string.c_str(), nullptr, 16);
auto a = static_cast<std::uint8_t>(x >> 24);
auto r = static_cast<std::uint8_t>((x >> 16) & 0xff);
auto g = static_cast<std::uint8_t>((x >> 8) & 0xff);
auto b = static_cast<std::uint8_t>(x & 0xff);
return { { r, g, b, a } };
}
} // namespace
namespace xlnt {
// indexed_color implementation
indexed_color::indexed_color(std::size_t index) : index_(index)
{
}
std::size_t indexed_color::index() const
{
return index_;
}
void indexed_color::index(std::size_t index)
{
index_ = index;
}
// theme_color implementation
theme_color::theme_color(std::size_t index) : index_(index)
{
}
std::size_t theme_color::index() const
{
return index_;
}
void theme_color::index(std::size_t index)
{
index_ = index;
}
// rgb_color implementation
std::string rgb_color::hex_string() const
{
static const char *digits = "0123456789ABCDEF";
std::string hex_string(8, '0');
auto out_iter = hex_string.begin();
for (auto byte : {rgba_[3], rgba_[0], rgba_[1], rgba_[2]})
{
for (auto i = 0; i < 2; ++i)
{
auto nibble = byte >> (4 * (1 - i)) & 0xf;
*(out_iter++) = digits[nibble];
}
}
return hex_string;
}
rgb_color::rgb_color(const std::string &hex_string)
: rgba_(decode_hex_string(hex_string))
{
}
rgb_color::rgb_color(std::uint8_t r, std::uint8_t g, std::uint8_t b, std::uint8_t a)
: rgba_({{r, g, b, a}})
{
}
std::uint8_t rgb_color::red() const
{
return rgba_[0];
}
std::uint8_t rgb_color::green() const
{
return rgba_[1];
}
std::uint8_t rgb_color::blue() const
{
return rgba_[2];
}
std::uint8_t rgb_color::alpha() const
{
return rgba_[3];
}
std::array<std::uint8_t, 3> rgb_color::rgb() const
{
return {{red(), green(), blue()}};
}
std::array<std::uint8_t, 4> rgb_color::rgba() const
{
return rgba_;
}
// color implementation
const color color::black()
{
return color(rgb_color("ff000000"));
}
const color color::white()
{
return color(rgb_color("ffffffff"));
}
const color color::red()
{
return color(rgb_color("ffff0000"));
}
const color color::darkred()
{
return color(rgb_color("ff8b0000"));
}
const color color::blue()
{
return color(rgb_color("ff0000ff"));
}
const color color::darkblue()
{
return color(rgb_color("ff00008b"));
}
const color color::green()
{
return color(rgb_color("ff00ff00"));
}
const color color::darkgreen()
{
return color(rgb_color("ff008b00"));
}
const color color::yellow()
{
return color(rgb_color("ffffff00"));
}
const color color::darkyellow()
{
return color(rgb_color("ffcccc00"));
}
color::color() : color(indexed_color(0))
{
}
color::color(const rgb_color &rgb)
: type_(color_type::rgb),
rgb_(rgb),
indexed_(0),
theme_(0)
{
}
color::color(const indexed_color &indexed)
: type_(color_type::indexed),
rgb_(rgb_color(0, 0, 0, 0)),
indexed_(indexed),
theme_(0)
{
}
color::color(const theme_color &theme)
: type_(color_type::theme),
rgb_(rgb_color(0, 0, 0, 0)),
indexed_(0),
theme_(theme)
{
}
color_type color::type() const
{
return type_;
}
bool color::auto_() const
{
return auto__;
}
void color::auto_(bool value)
{
auto__ = value;
}
const indexed_color& color::indexed() const
{
assert_type(color_type::indexed);
return indexed_;
}
indexed_color &color::indexed()
{
assert_type(color_type::indexed);
return indexed_;
}
const theme_color& color::theme() const
{
assert_type(color_type::theme);
return theme_;
}
theme_color &color::theme()
{
assert_type(color_type::theme);
return theme_;
}
const rgb_color& color::rgb() const
{
assert_type(color_type::rgb);
return rgb_;
}
rgb_color &color::rgb()
{
assert_type(color_type::rgb);
return rgb_;
}
void color::tint(double tint)
{
tint_ = tint;
}
double color::tint() const
{
return tint_;
}
void color::assert_type(color_type t) const
{
if (t != type_)
{
throw invalid_attribute();
}
}
bool color::operator==(const xlnt::color &other) const
{
if (type_ != other.type_ || std::fabs(tint_ - other.tint_) != 0.0 || auto__ != other.auto__)
{
return false;
}
switch (type_)
{
case color_type::indexed:
return indexed_.index() == other.indexed_.index();
case color_type::theme:
return theme_.index() == other.theme_.index();
case color_type::rgb:
return rgb_.hex_string() == other.rgb_.hex_string();
}
return false;
}
bool color::operator!=(const color &other) const
{
return !(*this == other);
}
} // namespace xlnt