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use super::color::{Color, ColorName};
enum ExpectedToken {
Any,
ColorByte,
ColorSpecifier,
}
#[derive(Copy, Clone, Debug, PartialEq)]
/// A structure representing a single unicode character on screen together with it's colors and style.
pub struct Glyph {
pub character: char,
pub color: Color,
pub background: Color,
pub plain: bool,
pub bright: bool,
pub dim: bool,
pub italic: bool,
pub underline: bool,
pub blink: bool,
pub blink_fast: bool,
pub reverse: bool,
pub transparent: bool,
pub strike: bool,
}
impl Glyph {
pub fn char(character: char) -> Self {
let mut glyph = Glyph::plain();
glyph.character = character;
glyph
}
/// Create a new glyph.
pub fn new(
character: char,
color: Color,
background: Color,
plain: bool,
bright: bool,
dim: bool,
italic: bool,
underline: bool,
blink: bool,
blink_fast: bool,
reverse: bool,
transparent: bool,
strike: bool,
) -> Self {
Glyph {
character,
color,
background,
plain,
bright,
dim,
italic,
underline,
blink,
blink_fast,
reverse,
transparent,
strike,
}
}
/// Create a new empty space black glyph with all styles disabled.
pub fn plain() -> Self {
Glyph {
character: ' ',
color: Color::Basic(ColorName::White),
background: Color::Basic(ColorName::Black),
plain: true,
bright: false,
dim: false,
italic: false,
underline: false,
blink: false,
blink_fast: false,
reverse: false,
transparent: false,
strike: false,
}
}
/// Create an empty space glyph that is transparent for printing logic.
pub fn transparent() -> Self {
Glyph {
character: ' ',
color: Color::Basic(ColorName::White),
background: Color::Basic(ColorName::Black),
plain: false,
bright: false,
dim: false,
italic: false,
underline: false,
blink: false,
blink_fast: false,
reverse: false,
transparent: true,
strike: false,
}
}
/// Create a black glyph.
pub fn black() -> Self {
let mut g = Glyph::default();
g.set_background(Color::black());
g
}
/// Create a red glyph.
pub fn red() -> Self {
let mut g = Glyph::default();
g.set_background(Color::red());
g
}
/// Create a green glyph.
pub fn green() -> Self {
let mut g = Glyph::default();
g.set_background(Color::green());
g
}
/// Create a yellow glyph.
pub fn yellow() -> Self {
let mut g = Glyph::default();
g.set_background(Color::yellow());
g
}
/// Create a blue glyph.
pub fn blue() -> Self {
let mut g = Glyph::default();
g.set_background(Color::blue());
g
}
/// Create a magenta glyph.
pub fn magenta() -> Self {
let mut g = Glyph::default();
g.set_background(Color::magenta());
g
}
/// Create a cyan glyph.
pub fn cyan() -> Self {
let mut g = Glyph::default();
g.set_background(Color::cyan());
g
}
/// Create a white glyph.
pub fn white() -> Self {
let mut g = Glyph::default();
g.set_background(Color::white());
g
}
/// Create a orange glyph.
pub fn orange() -> Self {
let mut g = Glyph::default();
g.set_background(Color::orange());
g
}
/// Create a indigo glyph.
pub fn indigo() -> Self {
let mut g = Glyph::default();
g.set_background(Color::indigo());
g
}
/// Create a violet glyph.
pub fn violet() -> Self {
let mut g = Glyph::default();
g.set_background(Color::violet());
g
}
/// Create a regular white on black glyph with given character.
pub fn default_with_char(character: char) -> Self {
let mut g = Glyph::default();
g.set_char(character);
g
}
/// Update a glyph with style information provided as &str.
pub fn update_from_str(&mut self, style_definition: &str) {
if style_definition.is_empty() {
eprintln!("can not update empty style");
return;
}
let mut tokens_started = false;
let mut tokens = Vec::with_capacity(16);
let mut current_token = String::with_capacity(3);
for char in style_definition.chars() {
match char {
'\x1b' => tokens_started = true,
'[' => {
if tokens_started {
continue;
} else {
self.set_char(char);
}
}
'm' => {
if tokens_started {
tokens_started = false;
if !current_token.is_empty() {
tokens.push(current_token.clone());
current_token.clear();
}
} else {
self.set_char(char);
}
}
';' => {
if !current_token.is_empty() {
tokens.push(current_token.clone());
current_token.clear();
}
}
_ => {
if tokens_started {
current_token.push(char);
} else {
self.set_char(char);
}
}
}
}
let mut color_8bit: u8;
let mut color_red: u8 = 0;
let mut color_green: u8 = 0;
let mut color_blue: u8;
let mut next_token = ExpectedToken::Any;
let mut defining_background = false;
let mut defining_truecolor = false;
let mut color_bytes_left_to_read: u8 = 0;
for token in tokens.iter() {
match next_token {
ExpectedToken::Any => match &token[..] {
"0" => {
self.set_bright(false);
self.set_transparent(false);
self.set_italic(false);
self.set_underline(false);
self.set_blink(false);
self.set_blinkfast(false);
self.set_reverse(false);
self.set_strike(false);
}
"21" => {
self.set_bright(false);
}
"1" => {
self.set_bright(true);
}
"2" => {
self.set_bright(false);
self.set_dim(true);
}
"22" => {
self.set_dim(false);
self.set_bright(false);
}
"23" => {
self.set_italic(false);
}
"3" => {
self.set_italic(true);
}
"24" => {
self.set_underline(false);
}
"4" => {
self.set_underline(true);
}
"25" => {
self.set_blink(false);
self.set_blinkfast(false);
}
"5" => {
self.set_blink(true);
}
"6" => {
self.set_blinkfast(true);
}
"27" => {
self.set_reverse(false);
}
"7" => {
self.set_reverse(true);
}
"8" => {
self.set_transparent(true);
}
"28" => {
self.set_transparent(false);
}
"29" => {
self.set_strike(false);
}
"9" => {
self.set_strike(true);
}
"30" => {
self.set_color(Color::black());
}
"31" => {
self.set_color(Color::red());
}
"32" => {
self.set_color(Color::green());
}
"33" => {
self.set_color(Color::yellow());
}
"34" => {
self.set_color(Color::blue());
}
"35" => {
self.set_color(Color::magenta());
}
"36" => {
self.set_color(Color::cyan());
}
"37" => {
self.set_color(Color::white());
}
"38" => {
next_token = ExpectedToken::ColorSpecifier;
}
"40" => {
self.set_background(Color::black());
}
"41" => {
self.set_background(Color::red());
}
"42" => {
self.set_background(Color::green());
}
"43" => {
self.set_background(Color::yellow());
}
"44" => {
self.set_background(Color::blue());
}
"45" => {
self.set_background(Color::magenta());
}
"46" => {
self.set_background(Color::cyan());
}
"47" => {
self.set_background(Color::white());
}
"48" => {
next_token = ExpectedToken::ColorSpecifier;
defining_background = true;
}
"90" => {
self.set_color(Color::black());
self.set_bright(true);
}
"91" => {
self.set_color(Color::red());
self.set_bright(true);
}
"92" => {
self.set_color(Color::green());
self.set_bright(true);
}
"93" => {
self.set_color(Color::yellow());
self.set_bright(true);
}
"94" => {
self.set_color(Color::blue());
self.set_bright(true);
}
"95" => {
self.set_color(Color::magenta());
self.set_bright(true);
}
"96" => {
self.set_color(Color::cyan());
self.set_bright(true);
}
"97" => {
self.set_color(Color::white());
self.set_bright(true);
}
"100" => {
self.set_background(Color::black());
self.set_bright(true);
}
"101" => {
self.set_background(Color::red());
self.set_bright(true);
}
"102" => {
self.set_background(Color::green());
self.set_bright(true);
}
"103" => {
self.set_background(Color::yellow());
self.set_bright(true);
}
"104" => {
self.set_background(Color::blue());
self.set_bright(true);
}
"105" => {
self.set_background(Color::magenta());
self.set_bright(true);
}
"106" => {
self.set_background(Color::cyan());
self.set_bright(true);
}
"107" => {
self.set_background(Color::white());
self.set_bright(true);
}
_ => {
continue;
}
},
ExpectedToken::ColorSpecifier => match &token[..] {
"2" => {
next_token = ExpectedToken::ColorByte;
color_bytes_left_to_read = 3;
defining_truecolor = true;
}
"5" => {
next_token = ExpectedToken::ColorByte;
color_bytes_left_to_read = 1;
}
_ => eprintln!(
"Was expecting 2 or 5, got {} while parsing for color",
token
),
},
ExpectedToken::ColorByte => {
if defining_truecolor {
match color_bytes_left_to_read {
3 => {
color_red = token.parse::<u8>().unwrap_or_default();
}
2 => {
color_green = token.parse::<u8>().unwrap_or_default();
}
1 => {
color_blue = token.parse::<u8>().unwrap_or_default();
next_token = ExpectedToken::Any;
if defining_background {
self.set_background(Color::new_truecolor(
color_red,
color_green,
color_blue,
));
} else {
self.set_color(Color::new_truecolor(
color_red,
color_green,
color_blue,
));
}
}
_ => continue,
}
} else {
match color_bytes_left_to_read {
1 => {
color_8bit = token.parse::<u8>().unwrap_or_default();
next_token = ExpectedToken::Any;
if defining_background {
if color_8bit > 231 {
self.set_background(Color::new_gray(color_8bit - 232));
} else {
self.set_background(Color::EightBit(color_8bit));
}
} else if color_8bit > 231 {
self.set_color(Color::new_gray(color_8bit - 232));
} else {
self.set_color(Color::EightBit(color_8bit));
}
}
_ => continue,
}
}
color_bytes_left_to_read = color_bytes_left_to_read.saturating_sub(1);
}
}
}
}
/// Set glyph's character to given value.
pub fn set_char(&mut self, character: char) {
self.character = character;
}
/// Set glyph's color to given value.
pub fn set_color(&mut self, color: Color) {
self.color = color;
}
/// Set glyph's background to given value.
pub fn set_background(&mut self, background: Color) {
self.background = background;
}
/// Set glyph's transparency setting to given value.
pub fn set_transparent(&mut self, transparent: bool) {
self.transparent = transparent;
}
/// Set glyph's brightness to given value.
pub fn set_bright(&mut self, bright: bool) {
self.bright = bright;
if self.bright {
self.dim = false;
}
}
/// Set glyph's dimming setting to given value.
pub fn set_dim(&mut self, dim: bool) {
self.dim = dim;
if self.dim {
self.bright = false;
}
}
/// Set glyph's plain setting to given value.
pub fn set_plain(&mut self, plain: bool) {
self.plain = plain;
if self.plain {
self.bright = false;
self.dim = false;
self.italic = false;
self.underline = false;
self.blink = false;
self.blink_fast = false;
self.reverse = false;
self.transparent = false;
self.strike = false;
self.color = Color::white();
self.background = Color::black();
}
}
/// Set glyph's italic seetting to given value.
pub fn set_italic(&mut self, italic: bool) {
self.italic = italic;
}
/// Set glyph's underline setting to given value.
pub fn set_underline(&mut self, underline: bool) {
self.underline = underline;
}
/// Set glyph's blink setting to given value.
pub fn set_blink(&mut self, blink: bool) {
self.blink = blink;
if self.blink {
self.blink_fast = false;
}
}
/// Set glyph's blinkfast setting to given value.
pub fn set_blinkfast(&mut self, blink: bool) {
self.blink_fast = blink;
if self.blink_fast {
self.blink = false;
}
}
/// Set glyph's reverse setting to given value.
pub fn set_reverse(&mut self, reverse: bool) {
self.reverse = reverse;
}
/// Set glyph's strike setting to given value.
pub fn set_strike(&mut self, strike: bool) {
self.strike = strike;
}
}
impl Default for Glyph {
fn default() -> Self {
Glyph {
character: ' ',
color: Color::Basic(ColorName::White),
background: Color::Basic(ColorName::Black),
plain: false,
bright: false,
dim: false,
italic: false,
underline: false,
blink: false,
blink_fast: false,
reverse: false,
transparent: false,
strike: false,
}
}
}