108 lines
2.5 KiB
Rust
108 lines
2.5 KiB
Rust
/*
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Module: term
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Simple ANSI color library
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*/
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// TODO: Windows support.
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/* Const: color_black */
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const color_black: u8 = 0u8;
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/* Const: color_red */
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const color_red: u8 = 1u8;
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/* Const: color_green */
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const color_green: u8 = 2u8;
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/* Const: color_yellow */
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const color_yellow: u8 = 3u8;
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/* Const: color_blue */
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const color_blue: u8 = 4u8;
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/* Const: color_magenta */
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const color_magenta: u8 = 5u8;
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/* Const: color_cyan */
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const color_cyan: u8 = 6u8;
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/* Const: color_light_gray */
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const color_light_gray: u8 = 7u8;
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/* Const: color_light_grey */
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const color_light_grey: u8 = 7u8;
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/* Const: color_dark_gray */
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const color_dark_gray: u8 = 8u8;
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/* Const: color_dark_grey */
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const color_dark_grey: u8 = 8u8;
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/* Const: color_bright_red */
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const color_bright_red: u8 = 9u8;
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/* Const: color_bright_green */
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const color_bright_green: u8 = 10u8;
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/* Const: color_bright_yellow */
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const color_bright_yellow: u8 = 11u8;
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/* Const: color_bright_blue */
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const color_bright_blue: u8 = 12u8;
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/* Const: color_bright_magenta */
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const color_bright_magenta: u8 = 13u8;
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/* Const: color_bright_cyan */
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const color_bright_cyan: u8 = 14u8;
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/* Const: color_bright_white */
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const color_bright_white: u8 = 15u8;
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fn esc(writer: io::buf_writer) { writer.write([0x1bu8, '[' as u8]); }
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/*
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Function: reset
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Reset the foreground and background colors to default
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*/
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fn reset(writer: io::buf_writer) {
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esc(writer);
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writer.write(['0' as u8, 'm' as u8]);
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}
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/*
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Function: color_supported
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Returns true if the terminal supports color
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*/
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fn color_supported() -> bool {
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let supported_terms = ["xterm-color", "xterm", "screen-bce"];
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ret alt generic_os::getenv("TERM") {
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option::some(env) {
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for term: str in supported_terms {
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if str::eq(term, env) { ret true; }
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}
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false
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}
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option::none. { false }
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};
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}
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fn set_color(writer: io::buf_writer, first_char: u8, color: u8) {
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assert (color < 16u8);
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esc(writer);
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let color = color;
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if color >= 8u8 { writer.write(['1' as u8, ';' as u8]); color -= 8u8; }
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writer.write([first_char, ('0' as u8) + color, 'm' as u8]);
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}
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/*
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Function: fg
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Set the foreground color
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*/
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fn fg(writer: io::buf_writer, color: u8) {
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ret set_color(writer, '3' as u8, color);
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}
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/*
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Function: fg
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Set the background color
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*/
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fn bg(writer: io::buf_writer, color: u8) {
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ret set_color(writer, '4' as u8, color);
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}
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// Local Variables:
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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