diff --git a/Cargo.lock b/Cargo.lock index c45d8739c..ec48c5964 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -508,6 +508,7 @@ dependencies = [ "helix-core", "helix-view", "serde", + "termini", "unicode-segmentation", ] @@ -1100,6 +1101,15 @@ dependencies = [ "winapi", ] +[[package]] +name = "termini" +version = "0.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "394766021ef3dae8077f080518cdf5360831990f77f5708d5e3594c9b3efa2f9" +dependencies = [ + "dirs-next", +] + [[package]] name = "textwrap" version = "0.15.1" diff --git a/book/src/themes.md b/book/src/themes.md index d12445968..392b5f8c9 100644 --- a/book/src/themes.md +++ b/book/src/themes.md @@ -13,10 +13,10 @@ ## Creating a theme Each line in the theme file is specified as below: ```toml -key = { fg = "#ffffff", bg = "#000000", modifiers = ["bold", "italic"] } +key = { fg = "#ffffff", bg = "#000000", underline = { color = "#ff0000", style = "curl"}, modifiers = ["bold", "italic"] } ``` -where `key` represents what you want to style, `fg` specifies the foreground color, `bg` the background color, and `modifiers` is a list of style modifiers. `bg` and `modifiers` can be omitted to defer to the defaults. +where `key` represents what you want to style, `fg` specifies the foreground color, `bg` the background color, `underline` the underline `style`/`color`, and `modifiers` is a list of style modifiers. `bg`, `underline` and `modifiers` can be omitted to defer to the defaults. To specify only the foreground color: @@ -77,17 +77,35 @@ ### Modifiers Less common modifiers might not be supported by your terminal emulator. +| Modifier | +| --- | +| `bold` | +| `dim` | +| `italic` | +| `underlined` | +| `slow_blink` | +| `rapid_blink` | +| `reversed` | +| `hidden` | +| `crossed_out` | + +> Note: The `underlined` modifier is deprecated and only available for backwards compatibility. +> Its behavior is equivalent to setting `underline.style="line"`. + +### Underline Style + +One of the following values may be used as a value for `underline.style`. + +Some styles might not be supported by your terminal emulator. + | Modifier | | --- | -| `bold` | -| `dim` | -| `italic` | -| `underlined` | -| `slow_blink` | -| `rapid_blink` | -| `reversed` | -| `hidden` | -| `crossed_out` | +| `line` | +| `curl` | +| `dashed` | +| `dot` | +| `double_line` | + ### Inheritance diff --git a/helix-tui/Cargo.toml b/helix-tui/Cargo.toml index b220c64f7..a4a1c389f 100644 --- a/helix-tui/Cargo.toml +++ b/helix-tui/Cargo.toml @@ -20,6 +20,7 @@ bitflags = "1.3" cassowary = "0.3" unicode-segmentation = "1.10" crossterm = { version = "0.25", optional = true } +termini = "0.1" serde = { version = "1", "optional" = true, features = ["derive"]} helix-view = { version = "0.6", path = "../helix-view", features = ["term"] } helix-core = { version = "0.6", path = "../helix-core" } diff --git a/helix-tui/src/backend/crossterm.rs b/helix-tui/src/backend/crossterm.rs index eff098b35..7c7250fa4 100644 --- a/helix-tui/src/backend/crossterm.rs +++ b/helix-tui/src/backend/crossterm.rs @@ -7,12 +7,45 @@ SetForegroundColor, }, terminal::{self, Clear, ClearType}, + Command, }; -use helix_view::graphics::{Color, CursorKind, Modifier, Rect}; -use std::io::{self, Write}; +use helix_view::graphics::{Color, CursorKind, Modifier, Rect, UnderlineStyle}; +use std::{ + fmt, + io::{self, Write}, +}; +fn vte_version() -> Option { + std::env::var("VTE_VERSION").ok()?.parse().ok() +} + +/// Describes terminal capabilities like extended underline, truecolor, etc. +#[derive(Copy, Clone, Debug, Default)] +struct Capabilities { + /// Support for undercurled, underdashed, etc. + has_extended_underlines: bool, +} + +impl Capabilities { + /// Detect capabilities from the terminfo database located based + /// on the $TERM environment variable. If detection fails, returns + /// a default value where no capability is supported. + pub fn from_env_or_default() -> Self { + match termini::TermInfo::from_env() { + Err(_) => Capabilities::default(), + Ok(t) => Capabilities { + // Smulx, VTE: https://unix.stackexchange.com/a/696253/246284 + // Su (used by kitty): https://sw.kovidgoyal.net/kitty/underlines + has_extended_underlines: t.extended_cap("Smulx").is_some() + || t.extended_cap("Su").is_some() + || vte_version() >= Some(5102), + }, + } + } +} pub struct CrosstermBackend { buffer: W, + capabilities: Capabilities, } impl CrosstermBackend @@ -20,7 +53,10 @@ impl CrosstermBackend W: Write, { pub fn new(buffer: W) -> CrosstermBackend { - CrosstermBackend { buffer } + CrosstermBackend { + buffer, + capabilities: Capabilities::from_env_or_default(), + } } } @@ -47,6 +83,8 @@ fn draw<'a, I>(&mut self, content: I) -> io::Result<()> { let mut fg = Color::Reset; let mut bg = Color::Reset; + let mut underline_color = Color::Reset; + let mut underline_style = UnderlineStyle::Reset; let mut modifier = Modifier::empty(); let mut last_pos: Option<(u16, u16)> = None; for (x, y, cell) in content { @@ -74,11 +112,32 @@ fn draw<'a, I>(&mut self, content: I) -> io::Result<()> bg = cell.bg; } + let mut new_underline_style = cell.underline_style; + if self.capabilities.has_extended_underlines { + if cell.underline_color != underline_color { + let color = CColor::from(cell.underline_color); + map_error(queue!(self.buffer, SetUnderlineColor(color)))?; + underline_color = cell.underline_color; + } + } else { + match new_underline_style { + UnderlineStyle::Reset | UnderlineStyle::Line => (), + _ => new_underline_style = UnderlineStyle::Line, + } + } + + if new_underline_style != underline_style { + let attr = CAttribute::from(new_underline_style); + map_error(queue!(self.buffer, SetAttribute(attr)))?; + underline_style = new_underline_style; + } + map_error(queue!(self.buffer, Print(&cell.symbol)))?; } map_error(queue!( self.buffer, + SetUnderlineColor(CColor::Reset), SetForegroundColor(CColor::Reset), SetBackgroundColor(CColor::Reset), SetAttribute(CAttribute::Reset) @@ -153,9 +212,6 @@ fn queue(&self, mut w: W) -> io::Result<()> if removed.contains(Modifier::ITALIC) { map_error(queue!(w, SetAttribute(CAttribute::NoItalic)))?; } - if removed.contains(Modifier::UNDERLINED) { - map_error(queue!(w, SetAttribute(CAttribute::NoUnderline)))?; - } if removed.contains(Modifier::DIM) { map_error(queue!(w, SetAttribute(CAttribute::NormalIntensity)))?; } @@ -176,9 +232,6 @@ fn queue(&self, mut w: W) -> io::Result<()> if added.contains(Modifier::ITALIC) { map_error(queue!(w, SetAttribute(CAttribute::Italic)))?; } - if added.contains(Modifier::UNDERLINED) { - map_error(queue!(w, SetAttribute(CAttribute::Underlined)))?; - } if added.contains(Modifier::DIM) { map_error(queue!(w, SetAttribute(CAttribute::Dim)))?; } @@ -195,3 +248,58 @@ fn queue(&self, mut w: W) -> io::Result<()> Ok(()) } } + +/// Crossterm uses semicolon as a seperator for colors +/// this is actually not spec compliant (altough commonly supported) +/// However the correct approach is to use colons as a seperator. +/// This usually doesn't make a difference for emulators that do support colored underlines. +/// However terminals that do not support colored underlines will ignore underlines colors with colons +/// while escape sequences with semicolons are always processed which leads to weird visual artifacts. +/// See [this nvim issue](https://github.com/neovim/neovim/issues/9270) for details +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct SetUnderlineColor(pub CColor); + +impl Command for SetUnderlineColor { + fn write_ansi(&self, f: &mut impl fmt::Write) -> fmt::Result { + let color = self.0; + + if color == CColor::Reset { + write!(f, "\x1b[59m")?; + return Ok(()); + } + f.write_str("\x1b[58:")?; + + let res = match color { + CColor::Black => f.write_str("5:0"), + CColor::DarkGrey => f.write_str("5:8"), + CColor::Red => f.write_str("5:9"), + CColor::DarkRed => f.write_str("5:1"), + CColor::Green => f.write_str("5:10"), + CColor::DarkGreen => f.write_str("5:2"), + CColor::Yellow => f.write_str("5:11"), + CColor::DarkYellow => f.write_str("5:3"), + CColor::Blue => f.write_str("5:12"), + CColor::DarkBlue => f.write_str("5:4"), + CColor::Magenta => f.write_str("5:13"), + CColor::DarkMagenta => f.write_str("5:5"), + CColor::Cyan => f.write_str("5:14"), + CColor::DarkCyan => f.write_str("5:6"), + CColor::White => f.write_str("5:15"), + CColor::Grey => f.write_str("5:7"), + CColor::Rgb { r, g, b } => write!(f, "2::{}:{}:{}", r, g, b), + CColor::AnsiValue(val) => write!(f, "5:{}", val), + _ => Ok(()), + }; + res?; + write!(f, "m")?; + Ok(()) + } + + #[cfg(windows)] + fn execute_winapi(&self) -> crossterm::Result<()> { + Err(std::io::Error::new( + std::io::ErrorKind::Other, + "SetUnderlineColor not supported by winapi.", + )) + } +} diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs index 21c53aadf..424e6d321 100644 --- a/helix-tui/src/buffer.rs +++ b/helix-tui/src/buffer.rs @@ -3,7 +3,7 @@ use std::cmp::min; use unicode_segmentation::UnicodeSegmentation; -use helix_view::graphics::{Color, Modifier, Rect, Style}; +use helix_view::graphics::{Color, Modifier, Rect, Style, UnderlineStyle}; /// A buffer cell #[derive(Debug, Clone, PartialEq)] @@ -11,6 +11,8 @@ pub struct Cell { pub symbol: String, pub fg: Color, pub bg: Color, + pub underline_color: Color, + pub underline_style: UnderlineStyle, pub modifier: Modifier, } @@ -44,6 +46,13 @@ pub fn set_style(&mut self, style: Style) -> &mut Cell { if let Some(c) = style.bg { self.bg = c; } + if let Some(c) = style.underline_color { + self.underline_color = c; + } + if let Some(style) = style.underline_style { + self.underline_style = style; + } + self.modifier.insert(style.add_modifier); self.modifier.remove(style.sub_modifier); self @@ -53,6 +62,8 @@ pub fn style(&self) -> Style { Style::default() .fg(self.fg) .bg(self.bg) + .underline_color(self.underline_color) + .underline_style(self.underline_style) .add_modifier(self.modifier) } @@ -61,6 +72,8 @@ pub fn reset(&mut self) { self.symbol.push(' '); self.fg = Color::Reset; self.bg = Color::Reset; + self.underline_color = Color::Reset; + self.underline_style = UnderlineStyle::Reset; self.modifier = Modifier::empty(); } } @@ -71,6 +84,8 @@ fn default() -> Cell { symbol: " ".into(), fg: Color::Reset, bg: Color::Reset, + underline_color: Color::Reset, + underline_style: UnderlineStyle::Reset, modifier: Modifier::empty(), } } @@ -87,7 +102,7 @@ fn default() -> Cell { /// /// ``` /// use helix_tui::buffer::{Buffer, Cell}; -/// use helix_view::graphics::{Rect, Color, Style, Modifier}; +/// use helix_view::graphics::{Rect, Color, UnderlineStyle, Style, Modifier}; /// /// let mut buf = Buffer::empty(Rect{x: 0, y: 0, width: 10, height: 5}); /// buf[(0, 2)].set_symbol("x"); @@ -97,7 +112,9 @@ fn default() -> Cell { /// symbol: String::from("r"), /// fg: Color::Red, /// bg: Color::White, -/// modifier: Modifier::empty() +/// underline_color: Color::Reset, +/// underline_style: UnderlineStyle::Reset, +/// modifier: Modifier::empty(), /// }); /// buf[(5, 0)].set_char('x'); /// assert_eq!(buf[(5, 0)].symbol, "x"); diff --git a/helix-tui/src/text.rs b/helix-tui/src/text.rs index 602090e55..1bfe5ee1f 100644 --- a/helix-tui/src/text.rs +++ b/helix-tui/src/text.rs @@ -134,6 +134,8 @@ pub fn width(&self) -> usize { /// style: Style { /// fg: Some(Color::Yellow), /// bg: Some(Color::Black), + /// underline_color: None, + /// underline_style: None, /// add_modifier: Modifier::empty(), /// sub_modifier: Modifier::empty(), /// }, @@ -143,6 +145,8 @@ pub fn width(&self) -> usize { /// style: Style { /// fg: Some(Color::Yellow), /// bg: Some(Color::Black), + /// underline_color: None, + /// underline_style: None, /// add_modifier: Modifier::empty(), /// sub_modifier: Modifier::empty(), /// }, @@ -152,6 +156,8 @@ pub fn width(&self) -> usize { /// style: Style { /// fg: Some(Color::Yellow), /// bg: Some(Color::Black), + /// underline_color: None, + /// underline_style: None, /// add_modifier: Modifier::empty(), /// sub_modifier: Modifier::empty(), /// }, @@ -161,6 +167,8 @@ pub fn width(&self) -> usize { /// style: Style { /// fg: Some(Color::Yellow), /// bg: Some(Color::Black), + /// underline_color: None, + /// underline_style: None, /// add_modifier: Modifier::empty(), /// sub_modifier: Modifier::empty(), /// }, diff --git a/helix-view/src/graphics.rs b/helix-view/src/graphics.rs index fb3c8b3f9..4374a5371 100644 --- a/helix-view/src/graphics.rs +++ b/helix-view/src/graphics.rs @@ -315,6 +315,44 @@ fn from(color: Color) -> Self { } } +#[derive(Debug, Clone, Copy, PartialEq)] +pub enum UnderlineStyle { + Reset, + Line, + Curl, + Dotted, + Dashed, + DoubleLine, +} + +impl FromStr for UnderlineStyle { + type Err = &'static str; + + fn from_str(modifier: &str) -> Result { + match modifier { + "line" => Ok(Self::Line), + "curl" => Ok(Self::Curl), + "dotted" => Ok(Self::Dotted), + "dashed" => Ok(Self::Dashed), + "double_line" => Ok(Self::DoubleLine), + _ => Err("Invalid underline style"), + } + } +} + +impl From for crossterm::style::Attribute { + fn from(style: UnderlineStyle) -> Self { + match style { + UnderlineStyle::Line => crossterm::style::Attribute::Underlined, + UnderlineStyle::Curl => crossterm::style::Attribute::Undercurled, + UnderlineStyle::Dotted => crossterm::style::Attribute::Underdotted, + UnderlineStyle::Dashed => crossterm::style::Attribute::Underdashed, + UnderlineStyle::DoubleLine => crossterm::style::Attribute::DoubleUnderlined, + UnderlineStyle::Reset => crossterm::style::Attribute::NoUnderline, + } + } +} + bitflags! { /// Modifier changes the way a piece of text is displayed. /// @@ -332,7 +370,6 @@ pub struct Modifier: u16 { const BOLD = 0b0000_0000_0001; const DIM = 0b0000_0000_0010; const ITALIC = 0b0000_0000_0100; - const UNDERLINED = 0b0000_0000_1000; const SLOW_BLINK = 0b0000_0001_0000; const RAPID_BLINK = 0b0000_0010_0000; const REVERSED = 0b0000_0100_0000; @@ -349,7 +386,6 @@ fn from_str(modifier: &str) -> Result { "bold" => Ok(Self::BOLD), "dim" => Ok(Self::DIM), "italic" => Ok(Self::ITALIC), - "underlined" => Ok(Self::UNDERLINED), "slow_blink" => Ok(Self::SLOW_BLINK), "rapid_blink" => Ok(Self::RAPID_BLINK), "reversed" => Ok(Self::REVERSED), @@ -375,7 +411,7 @@ fn from_str(modifier: &str) -> Result { /// just S3. /// /// ```rust -/// # use helix_view::graphics::{Rect, Color, Modifier, Style}; +/// # use helix_view::graphics::{Rect, Color, UnderlineStyle, Modifier, Style}; /// # use helix_tui::buffer::Buffer; /// let styles = [ /// Style::default().fg(Color::Blue).add_modifier(Modifier::BOLD | Modifier::ITALIC), @@ -391,6 +427,8 @@ fn from_str(modifier: &str) -> Result { /// fg: Some(Color::Yellow), /// bg: Some(Color::Red), /// add_modifier: Modifier::BOLD, +/// underline_color: Some(Color::Reset), +/// underline_style: Some(UnderlineStyle::Reset), /// sub_modifier: Modifier::empty(), /// }, /// buffer[(0, 0)].style(), @@ -401,7 +439,7 @@ fn from_str(modifier: &str) -> Result { /// reset all properties until that point use [`Style::reset`]. /// /// ``` -/// # use helix_view::graphics::{Rect, Color, Modifier, Style}; +/// # use helix_view::graphics::{Rect, Color, UnderlineStyle, Modifier, Style}; /// # use helix_tui::buffer::Buffer; /// let styles = [ /// Style::default().fg(Color::Blue).add_modifier(Modifier::BOLD | Modifier::ITALIC), @@ -415,6 +453,8 @@ fn from_str(modifier: &str) -> Result { /// Style { /// fg: Some(Color::Yellow), /// bg: Some(Color::Reset), +/// underline_color: Some(Color::Reset), +/// underline_style: Some(UnderlineStyle::Reset), /// add_modifier: Modifier::empty(), /// sub_modifier: Modifier::empty(), /// }, @@ -426,6 +466,8 @@ fn from_str(modifier: &str) -> Result { pub struct Style { pub fg: Option, pub bg: Option, + pub underline_color: Option, + pub underline_style: Option, pub add_modifier: Modifier, pub sub_modifier: Modifier, } @@ -435,6 +477,8 @@ fn default() -> Style { Style { fg: None, bg: None, + underline_color: None, + underline_style: None, add_modifier: Modifier::empty(), sub_modifier: Modifier::empty(), } @@ -447,6 +491,8 @@ pub fn reset() -> Style { Style { fg: Some(Color::Reset), bg: Some(Color::Reset), + underline_color: None, + underline_style: None, add_modifier: Modifier::empty(), sub_modifier: Modifier::all(), } @@ -482,6 +528,36 @@ pub fn bg(mut self, color: Color) -> Style { self } + /// Changes the underline color. + /// + /// ## Examples + /// + /// ```rust + /// # use helix_view::graphics::{Color, Style}; + /// let style = Style::default().underline_color(Color::Blue); + /// let diff = Style::default().underline_color(Color::Red); + /// assert_eq!(style.patch(diff), Style::default().underline_color(Color::Red)); + /// ``` + pub fn underline_color(mut self, color: Color) -> Style { + self.underline_color = Some(color); + self + } + + /// Changes the underline style. + /// + /// ## Examples + /// + /// ```rust + /// # use helix_view::graphics::{UnderlineStyle, Style}; + /// let style = Style::default().underline_style(UnderlineStyle::Line); + /// let diff = Style::default().underline_style(UnderlineStyle::Curl); + /// assert_eq!(style.patch(diff), Style::default().underline_style(UnderlineStyle::Curl)); + /// ``` + pub fn underline_style(mut self, style: UnderlineStyle) -> Style { + self.underline_style = Some(style); + self + } + /// Changes the text emphasis. /// /// When applied, it adds the given modifier to the `Style` modifiers. @@ -538,6 +614,8 @@ pub fn remove_modifier(mut self, modifier: Modifier) -> Style { pub fn patch(mut self, other: Style) -> Style { self.fg = other.fg.or(self.fg); self.bg = other.bg.or(self.bg); + self.underline_color = other.underline_color.or(self.underline_color); + self.underline_style = other.underline_style.or(self.underline_style); self.add_modifier.remove(other.sub_modifier); self.add_modifier.insert(other.add_modifier); diff --git a/helix-view/src/gutter.rs b/helix-view/src/gutter.rs index ab0e29866..2c207d276 100644 --- a/helix-view/src/gutter.rs +++ b/helix-view/src/gutter.rs @@ -1,7 +1,7 @@ use std::fmt::Write; use crate::{ - graphics::{Color, Modifier, Style}, + graphics::{Color, Style, UnderlineStyle}, Document, Editor, Theme, View, }; @@ -147,7 +147,7 @@ pub fn breakpoints<'doc>( .find(|breakpoint| breakpoint.line == line)?; let mut style = if breakpoint.condition.is_some() && breakpoint.log_message.is_some() { - error.add_modifier(Modifier::UNDERLINED) + error.underline_style(UnderlineStyle::Line) } else if breakpoint.condition.is_some() { error } else if breakpoint.log_message.is_some() { diff --git a/helix-view/src/theme.rs b/helix-view/src/theme.rs index 8a1f8b7ec..302844b7b 100644 --- a/helix-view/src/theme.rs +++ b/helix-view/src/theme.rs @@ -11,6 +11,7 @@ use serde::{Deserialize, Deserializer}; use toml::{map::Map, Value}; +use crate::graphics::UnderlineStyle; pub use crate::graphics::{Color, Modifier, Style}; pub static DEFAULT_THEME: Lazy = Lazy::new(|| { @@ -378,19 +379,48 @@ pub fn parse_modifier(value: &Value) -> Result { .ok_or(format!("Theme: invalid modifier: {}", value)) } + pub fn parse_underline_style(value: &Value) -> Result { + value + .as_str() + .and_then(|s| s.parse().ok()) + .ok_or(format!("Theme: invalid underline style: {}", value)) + } + pub fn parse_style(&self, style: &mut Style, value: Value) -> Result<(), String> { if let Value::Table(entries) = value { - for (name, value) in entries { + for (name, mut value) in entries { match name.as_str() { "fg" => *style = style.fg(self.parse_color(value)?), "bg" => *style = style.bg(self.parse_color(value)?), + "underline" => { + let table = value + .as_table_mut() + .ok_or("Theme: underline must be table")?; + if let Some(value) = table.remove("color") { + *style = style.underline_color(self.parse_color(value)?); + } + if let Some(value) = table.remove("style") { + *style = style.underline_style(Self::parse_underline_style(&value)?); + } + + if let Some(attr) = table.keys().next() { + return Err(format!("Theme: invalid underline attribute: {attr}")); + } + } "modifiers" => { let modifiers = value .as_array() .ok_or("Theme: modifiers should be an array")?; for modifier in modifiers { - *style = style.add_modifier(Self::parse_modifier(modifier)?); + if modifier + .as_str() + .map_or(false, |modifier| modifier == "underlined") + { + *style = style.underline_style(UnderlineStyle::Line); + } else { + *style = style.add_modifier(Self::parse_modifier(modifier)?); + } } } _ => return Err(format!("Theme: invalid style attribute: {}", name)), diff --git a/runtime/themes/dark_plus.toml b/runtime/themes/dark_plus.toml index f99da4fbf..fbb58e646 100644 --- a/runtime/themes/dark_plus.toml +++ b/runtime/themes/dark_plus.toml @@ -92,7 +92,8 @@ "info" = { fg = "light_blue" } "hint" = { fg = "light_gray3" } -diagnostic = { modifiers = ["underlined"] } +"diagnostic.error".underline = { color = "red", style = "curl" } +"diagnostic".underline = { color = "gold", style = "curl" } [palette] white = "#ffffff" diff --git a/runtime/themes/onedark.toml b/runtime/themes/onedark.toml index 1e7d9af1f..c4a56b90f 100644 --- a/runtime/themes/onedark.toml +++ b/runtime/themes/onedark.toml @@ -39,7 +39,10 @@ "diff.delta" = "gold" "diff.minus" = "red" -diagnostic = { modifiers = ["underlined"] } +"diagnostic.info".underline = { color = "blue", style = "curl" } +"diagnostic.hint".underline = { color = "green", style = "curl" } +"diagnostic.warning".underline = { color = "yellow", style = "curl" } +"diagnostic.error".underline = { color = "red", style = "curl" } "info" = { fg = "blue", modifiers = ["bold"] } "hint" = { fg = "green", modifiers = ["bold"] } "warning" = { fg = "yellow", modifiers = ["bold"] }