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| 1 | #include <iostream> | |
| 2 | using std::ostream, std::cout, std::endl; | |
| 3 | ||
| 4 | const char escape = char( 27 ); | |
| 5 | const char ansi_prefix[3] = {escape, '[', '\0'};
| |
| 6 | ||
| 7 | // Based on code from an example at | |
| 8 | // <url: https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences>: | |
| 9 | #ifdef _WIN32 | |
| 10 | #include <stdint.h> | |
| 11 | namespace winapi {
| |
| 12 | using BOOL = int; | |
| 13 | using HANDLE = void*; | |
| 14 | using DWORD = uint32_t; | |
| 15 | const auto STD_OUTPUT_HANDLE = static_cast<DWORD>( -11 ); | |
| 16 | const auto ENABLE_VIRTUAL_TERMINAL_PROCESSING = static_cast<DWORD>( 4 ); | |
| 17 | const auto INVALID_HANDLE_VALUE = reinterpret_cast<HANDLE>( -1 ); | |
| 18 | ||
| 19 | extern "C" auto __stdcall GetStdHandle( const DWORD ) -> HANDLE; | |
| 20 | extern "C" auto __stdcall GetConsoleMode( HANDLE, DWORD* ) -> BOOL; | |
| 21 | extern "C" auto __stdcall SetConsoleMode( HANDLE, DWORD ) -> BOOL; | |
| 22 | ||
| 23 | inline auto enable_virtual_terminal_mode() | |
| 24 | -> bool | |
| 25 | {
| |
| 26 | const HANDLE output_handle = GetStdHandle( STD_OUTPUT_HANDLE ); | |
| 27 | if( output_handle == INVALID_HANDLE_VALUE) {
| |
| 28 | return false; | |
| 29 | } | |
| 30 | ||
| 31 | DWORD mode = 0; | |
| 32 | if( not GetConsoleMode( output_handle, &mode ) ){
| |
| 33 | return false; | |
| 34 | } | |
| 35 | ||
| 36 | mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING; | |
| 37 | return !!SetConsoleMode( output_handle, mode ); | |
| 38 | } | |
| 39 | ||
| 40 | inline const bool colors_are_available = enable_virtual_terminal_mode(); | |
| 41 | } // namespace winapi | |
| 42 | #endif | |
| 43 | ||
| 44 | // From the same Microsoft page: | |
| 45 | struct Ansi_color{ enum Enum: int {
| |
| 46 | original_colors = 0, // Returns to default state prior to modification. | |
| 47 | bold_or_bright = 1, // Applies brightness/intensity flag to foreground color | |
| 48 | underline = 4, // Adds underline | |
| 49 | no_underline = 24, // Removes underline | |
| 50 | negative = 7, // Swaps foreground and background colors | |
| 51 | positive = 27, // Returns foreground/background to normal | |
| 52 | foreground_black = 30, // Applies non-bold/bright black to foreground | |
| 53 | foreground_red = 31, // Applies non-bold/bright red to foreground | |
| 54 | foreground_green = 32, // Applies non-bold/bright green to foreground | |
| 55 | foreground_yellow = 33, // Applies non-bold/bright yellow to foreground | |
| 56 | foreground_blue = 34, // Applies non-bold/bright blue to foreground | |
| 57 | foreground_magenta = 35, // Applies non-bold/bright magenta to foreground | |
| 58 | foreground_cyan = 36, // Applies non-bold/bright cyan to foreground | |
| 59 | foreground_white = 37, // Applies non-bold/bright white to foreground | |
| 60 | foreground_extended = 38, // Applies extended color value to the foreground (see details below) | |
| 61 | foreground_default = 39, // Applies only the foreground portion of the defaults (see 0) | |
| 62 | background_black = 40, // Applies non-bold/bright black to background | |
| 63 | background_red = 41, // Applies non-bold/bright red to background | |
| 64 | background_green = 42, // Applies non-bold/bright green to background | |
| 65 | background_yellow = 43, // Applies non-bold/bright yellow to background | |
| 66 | background_blue = 44, // Applies non-bold/bright blue to background | |
| 67 | background_magenta = 45, // Applies non-bold/bright magenta to background | |
| 68 | background_cyan = 46, // Applies non-bold/bright cyan to background | |
| 69 | background_white = 47, // Applies non-bold/bright white to background | |
| 70 | background_extended = 48, // Applies extended color value to the background (see details below) | |
| 71 | background_default = 49, // Applies only the background portion of the defaults (see 0) | |
| 72 | bright_foreground_black = 90, // Applies bold/bright black to foreground | |
| 73 | bright_foreground_red = 91, // Applies bold/bright red to foreground | |
| 74 | bright_foreground_green = 92, // Applies bold/bright green to foreground | |
| 75 | bright_foreground_yellow = 93, // Applies bold/bright yellow to foreground | |
| 76 | bright_foreground_blue = 94, // Applies bold/bright blue to foreground | |
| 77 | bright_foreground_magenta = 95, // Applies bold/bright magenta to foreground | |
| 78 | bright_foreground_cyan = 96, // Applies bold/bright cyan to foreground | |
| 79 | bright_foreground_white = 97, // Applies bold/bright white to foreground | |
| 80 | bright_background_black = 100, // Applies bold/bright black to background | |
| 81 | bright_background_red = 101, // Applies bold/bright red to background | |
| 82 | bright_background_green = 102, // Applies bold/bright green to background | |
| 83 | bright_background_yellow = 103, // Applies bold/bright yellow to background | |
| 84 | bright_background_blue = 104, // Applies bold/bright blue to background | |
| 85 | bright_background_magenta = 105, // Applies bold/bright magenta to background | |
| 86 | bright_background_cyan = 106, // Applies bold/bright cyan to background | |
| 87 | bright_background_white = 107 // Applies bold/bright white to background | |
| 88 | }; }; | |
| 89 | ||
| 90 | auto operator<<( ostream& stream, const Ansi_color::Enum code ) | |
| 91 | -> ostream& | |
| 92 | { return stream << ansi_prefix << +code << 'm'; }
| |
| 93 | ||
| 94 | auto main() -> int | |
| 95 | {
| |
| 96 | cout << "Colored text:" << endl; | |
| 97 | for( int code = Ansi_color::bright_foreground_red; | |
| 98 | code <= Ansi_color::bright_foreground_white; | |
| 99 | ++code ) {
| |
| 100 | cout << Ansi_color::Enum( code ) << "word "; | |
| 101 | } | |
| 102 | cout << Ansi_color::original_colors << endl; | |
| 103 | cout << "And that was that." << endl; | |
| 104 | } |
