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// Copyright 2013 Michael Thomas Greer.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file
// LICENSE_1_0.txt
// or copy at
// http://www.boost.org/LICENSE_1_0.txt )
#ifndef WINCONCOLOR_HPP
#define WINCONCOLOR_HPP
/*
Provides the following ostream manipulators
colors() -- reset both colors to the initial color
colors( int fg, int bg ) -- set both colors at once
color ( int fg )
fgcolor( int fg ) -- set the foreground color
bgcolor( int bg ) -- set the background color
The way that high-intensity background colors appear on your terminal
depends on your user's environment. Modern Windows systems will use the
specified color, but older ones may use the darker color and cause the
foreground color to blink. There is no way to fix this without obtrusive
dinking around with Windows internals. Sorry.
Example:
#include <iostream>
#include <limits>
#include "winconcolor.hpp"
using namespace std;
int main()
{
string user_name;
cout << "What is your "
<< console::color( console::dark_cyan ) << "name"
<< console::colors() << "? ";
cout << console::color( console::light_cyan );
cin >> user_name;
cin.ignore( numeric_limits <streamsize> ::max(), '\n' );
cout << console::colors() << "Hello "
<< console::color( console::dark_cyan ) << user_name
<< console::colors() << "!\n";
return 0;
}
Notice that color changes are PERSISTENT, and that INPUT is also affected
by colors.
At the end of your program, the console colors are automatically reset to
their initial values (when your program started).
*/
#include <iostream>
#define NO_MINMAX
#include <windows.h>
namespace console
{
enum
{
black,
dark_blue,
dark_green,
dark_cyan,
dark_red,
dark_magenta,
dark_yellow,
light_gray,
dark_gray,
light_blue,
light_green,
light_cyan,
light_red,
light_magenta,
light_yellow,
white
};
struct colors_t
{
HANDLE hstdout;
int initial;
colors_t():
hstdout( GetStdHandle( STD_OUTPUT_HANDLE ) ),
initial( get() )
{ }
~colors_t()
{
set( initial );
}
int get() const
{
CONSOLE_SCREEN_BUFFER_INFO csbi;
GetConsoleScreenBufferInfo( hstdout, &csbi );
return csbi.wAttributes;
}
colors_t& set( int color )
{
SetConsoleTextAttribute( hstdout, color );
return *this;
}
colors_t& set( int fg, int bg )
{
return set( ((bg & 0x0F) << 4) | (fg & 0x0F) );
}
int fg() const
{
return get() & 0x0F;
}
colors_t& fg( int color )
{
int current_colors = get();
return set( (current_colors & 0xF0) | (color & 0x0F) );
}
int bg() const
{
return (get() >> 4) & 0x0F;
}
colors_t& bg( int color )
{
int current_colors = get();
return set( ((color & 0x0F) << 4) | (current_colors & 0x0F) );
}
};
colors_t& get_colors()
{
static colors_t colors;
return colors;
}
struct ostream_color_t
{
int fg;
int bg;
ostream_color_t( int fg, int bg ): fg( fg ), bg( bg ) { }
};
std::ostream& operator << ( std::ostream& outs, const ostream_color_t& c )
{
get_colors().set(
(c.fg < 0) ? get_colors().fg() : c.fg,
(c.bg < 0) ? get_colors().bg() : c.bg
);
return outs;
}
ostream_color_t colors()
{
return ostream_color_t(
get_colors().initial & 0x0F,
get_colors().initial >> 4
);
}
ostream_color_t colors( int fg, int bg ) { return ostream_color_t( fg, bg ); }
ostream_color_t color ( int color ) { return ostream_color_t( color, -1 ); }
ostream_color_t fgcolor( int color ) { return ostream_color_t( color, -1 ); }
ostream_color_t bgcolor( int color ) { return ostream_color_t( -1, color ); }
} // namespace console
#endif
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