diff options
| -rw-r--r-- | helix-tui/src/backend/crossterm.rs | 77 |
1 files changed, 68 insertions, 9 deletions
diff --git a/helix-tui/src/backend/crossterm.rs b/helix-tui/src/backend/crossterm.rs index 4d8c6650..7b3b0817 100644 --- a/helix-tui/src/backend/crossterm.rs +++ b/helix-tui/src/backend/crossterm.rs @@ -4,13 +4,16 @@ use crossterm::{ execute, queue, style::{ Attribute as CAttribute, Color as CColor, Print, SetAttribute, SetBackgroundColor, - SetForegroundColor, SetUnderlineColor, + SetForegroundColor, }, terminal::{self, Clear, ClearType}, + Command, }; use helix_view::graphics::{Color, CursorKind, Modifier, Rect, UnderlineStyle}; -use std::io::{self, Write}; - +use std::{ + fmt, + io::{self, Write}, +}; fn vte_version() -> Option<usize> { std::env::var("VTE_VERSION").ok()?.parse().ok() } @@ -108,18 +111,19 @@ where map_error(queue!(self.buffer, SetBackgroundColor(color)))?; bg = cell.bg; } - 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; - } let mut new_underline_style = cell.underline_style; if !self.capabilities.has_extended_underlines { match new_underline_style { - UnderlineStyle::Reset => (), + UnderlineStyle::Reset | UnderlineStyle::Line => (), _ => new_underline_style = UnderlineStyle::Line, } + + 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; + } } if new_underline_style != underline_style { @@ -244,3 +248,58 @@ impl ModifierDiff { 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.", + )) + } +} |