theme: Enable style modifiers in theme.toml, add Ingrid's theme (#113)
* theme: Enable style modifiers in theme.toml * docs: theme documentation * fixup: parse modifiers with filter_map * theme: tests for parse_style * theme: Log invalid cases in theme.toml parse * docs: theme documentation fixup * docs: Blaz's theming comments * docs: Theme doc fixes from pickfire Co-authored-by: Ivan Tham <pickfire@riseup.net> * theme: More context in logs, TODO for alerting users * contrib: Ingrid's theme * docs: Theme subsection fixes Co-authored-by: Ivan Tham <pickfire@riseup.net>
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Cargo.lock
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Cargo.lock
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@ -355,6 +355,7 @@ dependencies = [
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"helix-core",
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"helix-lsp",
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"helix-tui",
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"log",
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"once_cell",
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"serde",
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"slotmap",
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@ -1 +1,87 @@
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# Configuration
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## Theme
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Use a custom theme by placing a theme.toml in your config directory (i.e ~/.config/helix/theme.toml). The default theme.toml can be found [here](https://github.com/helix-editor/helix/blob/master/theme.toml), and user submitted themes [here](https://github.com/helix-editor/helix/blob/master/contrib/themes).
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Styles in theme.toml are specified of in the form:
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```toml
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key = { fg = "#ffffff", bg = "#000000", modifiers = ["bold", "italic"] }
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```
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where `name` 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.
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To specify only the foreground color:
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```toml
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key = "#ffffff"
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```
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if the key contains a dot `'.'`, it must be quoted to prevent it being parsed as a [dotted key](https://toml.io/en/v1.0.0#keys).
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```toml
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"key.key" = "#ffffff"
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```
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Possible modifiers:
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| modifier |
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| --- |
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| bold |
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| dim |
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| italic |
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| underlined |
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| slow\_blink |
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| rapid\_blink |
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| reversed |
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| hidden |
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| crossed\_out |
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Possible keys:
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| key | notes |
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| --- | --- |
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| attribute | |
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| keyword | |
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| keyword.directive | preprocessor directives (\#if in C) |
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| namespace | |
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| punctuation | |
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| punctuation.delimiter | |
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| operator | |
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| special | |
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| property | |
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| variable | |
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| variable.parameter | |
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| type | |
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| type.builtin | |
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| constructor | |
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| function | |
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| function.macro | |
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| function.builtin | |
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| comment | |
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| variable.builtin | |
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| constant | |
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| constant.builtin | |
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| string | |
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| number | |
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| escape | escaped characters |
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| label | used for lifetimes |
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| module | |
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| ui.background | |
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| ui.linenr | |
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| ui.statusline | |
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| ui.popup | |
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| ui.window | |
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| ui.help | |
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| ui.text | |
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| ui.text.focus | |
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| ui.menu.selected | |
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| warning | LSP warning |
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| error | LSP error |
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| info | LSP info |
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| hint | LSP hint |
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These keys match [tree-sitter scopes](https://tree-sitter.github.io/tree-sitter/syntax-highlighting#theme). We half-follow the common scopes from [macromates language grammars](https://macromates.com/manual/en/language_grammars) with some differences.
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For a given highlight produced, styling will be determined based on the longest matching theme key. So it's enough to provide function to highlight `function.macro` and `function.builtin` as well, but you can use more specific scopes to highlight specific cases differently.
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9
contrib/themes/README.md
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9
contrib/themes/README.md
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@ -0,0 +1,9 @@
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# User submitted themes
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If you submit a theme, please include a comment at the top with your name and email address:
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```toml
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# Author : Name <email@my.domain>
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```
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We have a preview page for themes on our [wiki](https://github.com/helix-editor/helix/wiki/Themes)!
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46
contrib/themes/ingrid.toml
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46
contrib/themes/ingrid.toml
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@ -0,0 +1,46 @@
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# Author : Ingrid Rebecca Abraham <git@ingrids.email>
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"attribute" = "#839A53"
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"keyword" = { fg = "#D74E50", modifiers = ["bold"] }
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"keyword.directive" = "#6F873E"
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"namespace" = "#839A53"
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"punctuation" = "#C97270"
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"punctuation.delimiter" = "#C97270"
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"operator" = { fg = "#D74E50", modifiers = ["bold"] }
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"special" = "#D68482"
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"property" = "#89BEB7"
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"variable" = "#A6B6CE"
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"variable.parameter" = "#89BEB7"
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"type" = { fg = "#A6B6CE", modifiers = ["bold"] }
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"type.builtin" = "#839A53"
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"constructor" = { fg = "#839A53", modifiers = ["bold"] }
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"function" = { fg = "#89BEB7", modifiers = ["bold"] }
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"function.macro" = { fg = "#D4A520", modifiers = ["bold"] }
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"function.builtin" = "#89BEB7"
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"comment" = "#A6B6CE"
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"variable.builtin" = "#D4A520"
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"constant" = "#D4A520"
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"constant.builtin" = "#D4A520"
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"string" = "#D74E50"
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"number" = "#D74E50"
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"escape" = { fg = "#D74E50", modifiers = ["bold"] }
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"label" = "#D68482"
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"module" = "#839A53"
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"ui.background" = { bg = "#FFFCFD" }
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"ui.linenr" = { fg = "#bbbbbb" }
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"ui.statusline" = { bg = "#F3EAE9" }
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"ui.popup" = { bg = "#F3EAE9" }
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"ui.window" = { bg = "#D8B8B3" }
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"ui.help" = { bg = "#D8B8B3", fg = "#250E07" }
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"ui.text" = { fg = "#7B91B3" }
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"ui.text.focus" = { fg = "#250E07", modifiers= ["bold"] }
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"ui.menu.selected" = { fg = "#D74E50", bg = "#F3EAE9" }
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"warning" = "#D4A520"
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"error" = "#D74E50"
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"info" = "#839A53"
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"hint" = "#A6B6CE"
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@ -28,3 +28,4 @@ slotmap = "1"
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serde = { version = "1.0", features = ["derive"] }
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toml = "0.5"
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log = "~0.4"
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@ -1,10 +1,11 @@
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use std::collections::HashMap;
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use log::warn;
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use serde::{Deserialize, Deserializer};
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use toml::Value;
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#[cfg(feature = "term")]
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pub use tui::style::{Color, Style};
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pub use tui::style::{Color, Modifier, Style};
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// #[derive(Clone, Copy, PartialEq, Eq, Default, Hash)]
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// pub struct Color {
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@ -115,6 +116,7 @@ impl<'de> Deserialize<'de> for Theme {
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}
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fn parse_style(style: &mut Style, value: Value) {
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//TODO: alert user of parsing failures
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if let Value::Table(entries) = value {
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for (name, value) in entries {
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match name.as_str() {
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@ -128,6 +130,13 @@ fn parse_style(style: &mut Style, value: Value) {
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*style = style.bg(color);
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}
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}
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"modifiers" => {
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if let Value::Array(arr) = value {
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for modifier in arr.iter().filter_map(parse_modifier) {
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*style = style.add_modifier(modifier);
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}
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}
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}
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_ => (),
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}
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}
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@ -157,9 +166,34 @@ fn parse_color(value: Value) -> Option<Color> {
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if let Some((red, green, blue)) = hex_string_to_rgb(&s) {
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Some(Color::Rgb(red, green, blue))
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} else {
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warn!("malformed hexcode in theme: {}", s);
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None
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}
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} else {
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warn!("unrecognized value in theme: {}", value);
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None
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}
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}
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fn parse_modifier(value: &Value) -> Option<Modifier> {
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if let Value::String(s) = value {
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match s.as_str() {
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"bold" => Some(Modifier::BOLD),
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"dim" => Some(Modifier::DIM),
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"italic" => Some(Modifier::ITALIC),
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"underlined" => Some(Modifier::UNDERLINED),
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"slow_blink" => Some(Modifier::SLOW_BLINK),
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"rapid_blink" => Some(Modifier::RAPID_BLINK),
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"reversed" => Some(Modifier::REVERSED),
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"hidden" => Some(Modifier::HIDDEN),
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"crossed_out" => Some(Modifier::CROSSED_OUT),
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_ => {
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warn!("unrecognized modifier in theme: {}", s);
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None
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}
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}
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} else {
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warn!("unrecognized modifier in theme: {}", value);
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None
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}
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}
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@ -177,3 +211,39 @@ impl Theme {
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&self.scopes
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}
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}
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#[test]
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fn test_parse_style_string() {
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let fg = Value::String("#ffffff".to_string());
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let mut style = Style::default();
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parse_style(&mut style, fg);
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assert_eq!(style, Style::default().fg(Color::Rgb(255, 255, 255)));
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}
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#[test]
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fn test_parse_style_table() {
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let table = toml::toml! {
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"keyword" = {
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fg = "#ffffff",
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bg = "#000000",
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modifiers = ["bold"],
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}
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};
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let mut style = Style::default();
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if let Value::Table(entries) = table {
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for (_name, value) in entries {
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parse_style(&mut style, value);
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}
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}
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assert_eq!(
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style,
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Style::default()
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.fg(Color::Rgb(255, 255, 255))
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.bg(Color::Rgb(0, 0, 0))
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.add_modifier(Modifier::BOLD)
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);
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}
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