Show colors subcommand

Color groups from https://www.w3schools.com/colors/colors_groups.asp

6 files changed, 297 insertions, 0 deletions

diff --git a/src/cli.rs b/src/cli.rs
index fdf54138..9f4a18cf 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -294,6 +294,11 @@ pub struct Opt {
     #[structopt(long = "show-themes")]
     pub show_themes: bool,
 
+    /// Show available named colors. In addition to named colors, arbitrary
+    /// colors can be specified using RGB hex codes. See COLORS section.
+    #[structopt(long = "show-colors")]
+    pub show_colors: bool,
+
     #[structopt(long = "no-gitconfig")]
     /// Do not take any settings from git config. See GIT CONFIG section.
     pub no_gitconfig: bool,
diff --git a/src/colors.rs b/src/colors.rs
new file mode 100644
index 00000000..00e826a1
--- /dev/null
+++ b/src/colors.rs
@@ -0,0 +1,213 @@
+use std::collections::HashMap;
+
+pub fn color_groups() -> HashMap<String, Vec<(String, String)>> {
+    [
+        (
+            "Blue",
+            vec![
+                ("cadetblue", "#5f9ea0"),
+                ("steelblue", "#4682b4"),
+                ("lightsteelblue", "#b0c4de"),
+                ("lightblue", "#add8e6"),
+                ("powderblue", "#b0e0e6"),
+                ("lightskyblue", "#87cefa"),
+                ("skyblue", "#87ceeb"),
+                ("cornflowerblue", "#6495ed"),
+                ("deepskyblue", "#00bfff"),
+                ("dodgerblue", "#1e90ff"),
+                ("royalblue", "#4169e1"),
+                ("blue", "#0000ff"),
+                ("mediumblue", "#0000cd"),
+                ("darkblue", "#00008b"),
+                ("navy", "#000080"),
+                ("midnightblue", "#191970"),
+            ],
+        ),
+        (
+            "Brown",
+            vec![
+                ("cornsilk", "#fff8dc"),
+                ("blanchedalmond", "#ffebcd"),
+                ("bisque", "#ffe4c4"),
+                ("navajowhite", "#ffdead"),
+                ("wheat", "#f5deb3"),
+                ("burlywood", "#deb887"),
+                ("tan", "#d2b48c"),
+                ("rosybrown", "#bc8f8f"),
+                ("sandybrown", "#f4a460"),
+                ("goldenrod", "#daa520"),
+                ("darkgoldenrod", "#b8860b"),
+                ("peru", "#cd853f"),
+                ("chocolate", "#d2691e"),
+                ("olive", "#808000"),
+                ("saddlebrown", "#8b4513"),
+                ("sienna", "#a0522d"),
+                ("brown", "#a52a2a"),
+                ("maroon", "#800000"),
+            ],
+        ),
+        (
+            "Cyan",
+            vec![
+                ("aqua", "#00ffff"),
+                ("cyan", "#00ffff"),
+                ("lightcyan", "#e0ffff"),
+                ("paleturquoise", "#afeeee"),
+                ("aquamarine", "#7fffd4"),
+                ("turquoise", "#40e0d0"),
+                ("mediumturquoise", "#48d1cc"),
+                ("darkturquoise", "#00ced1"),
+            ],
+        ),
+        (
+            "Green",
+            vec![
+                ("greenyellow", "#adff2f"),
+                ("chartreuse", "#7fff00"),
+                ("lawngreen", "#7cfc00"),
+                ("lime", "#00ff00"),
+                ("limegreen", "#32cd32"),
+                ("palegreen", "#98fb98"),
+                ("lightgreen", "#90ee90"),
+                ("mediumspringgreen", "#00fa9a"),
+                ("springgreen", "#00ff7f"),
+                ("mediumseagreen", "#3cb371"),
+                ("seagreen", "#2e8b57"),
+                ("forestgreen", "#228b22"),
+                ("green", "#008000"),
+                ("darkgreen", "#006400"),
+                ("yellowgreen", "#9acd32"),
+                ("olivedrab", "#6b8e23"),
+                ("darkolivegreen", "#556b2f"),
+                ("mediumaquamarine", "#66cdaa"),
+                ("darkseagreen", "#8fbc8f"),
+                ("lightseagreen", "#20b2aa"),
+                ("darkcyan", "#008b8b"),
+                ("teal", "#008080"),
+            ],
+        ),
+        (
+            "Grey",
+            vec![
+                ("gainsboro", "#dcdcdc"),
+                ("lightgray", "#d3d3d3"),
+                ("silver", "#c0c0c0"),
+                ("darkgray", "#a9a9a9"),
+                ("dimgray", "#696969"),
+                ("gray", "#808080"),
+                ("lightslategray", "#778899"),
+                ("slategray", "#708090"),
+                ("darkslategray", "#2f4f4f"),
+                ("black", "#000000"),
+            ],
+        ),
+        (
+            "Orange",
+            vec![
+                ("orange", "#ffa500"),
+                ("darkorange", "#ff8c00"),
+                ("coral", "#ff7f50"),
+                ("tomato", "#ff6347"),
+                ("orangered", "#ff4500"),
+            ],
+        ),
+        (
+            "Pink",
+            vec![
+                ("pink", "#ffc0cb"),
+                ("lightpink", "#ffb6c1"),
+                ("hotpink", "#ff69b4"),
+                ("deeppink", "#ff1493"),
+                ("palevioletred", "#db7093"),
+                ("mediumvioletred", "#c71585"),
+            ],
+        ),
+        (
+            "Purple",
+            vec![
+                ("lavender", "#e6e6fa"),
+                ("thistle", "#d8bfd8"),
+                ("plum", "#dda0dd"),
+                ("orchid", "#da70d6"),
+                ("violet", "#ee82ee"),
+                ("fuchsia", "#ff00ff"),
+                ("magenta", "#ff00ff"),
+                ("mediumorchid", "#ba55d3"),
+                ("darkorchid", "#9932cc"),
+                ("darkviolet", "#9400d3"),
+                ("blueviolet", "#8a2be2"),
+                ("darkmagenta", "#8b008b"),
+                ("purple", "#800080"),
+                ("mediumpurple", "#9370db"),
+                ("mediumslateblue", "#7b68ee"),
+                ("slateblue", "#6a5acd"),
+                ("darkslateblue", "#483d8b"),
+                ("rebeccapurple", "#663399"),
+                ("indigo", "#4b0082"),
+            ],
+        ),
+        (
+            "Red",
+            vec![
+                ("lightsalmon", "#ffa07a"),
+                ("salmon", "#fa8072"),
+                ("darksalmon", "#e9967a"),
+                ("lightcoral", "#f08080"),
+                ("indianred", "#cd5c5c"),
+                ("crimson", "#dc143c"),
+                ("red", "#ff0000"),
+                ("firebrick", "#b22222"),
+                ("darkred", "#8b0000"),
+            ],
+        ),
+        (
+            "White",
+            vec![
+                ("white", "#ffffff"),
+                ("snow", "#fffafa"),
+                ("honeydew", "#f0fff0"),
+                ("mintcream", "#f5fffa"),
+                ("azure", "#f0ffff"),
+                ("aliceblue", "#f0f8ff"),
+                ("ghostwhite", "#f8f8ff"),
+                ("whitesmoke", "#f5f5f5"),
+                ("seashell", "#fff5ee"),
+                ("beige", "#f5f5dc"),
+                ("oldlace", "#fdf5e6"),
+                ("floralwhite", "#fffaf0"),
+                ("ivory", "#fffff0"),
+                ("antiquewhite", "#faebd7"),
+                ("linen", "#faf0e6"),
+                ("lavenderblush", "#fff0f5"),
+                ("mistyrose", "#ffe4e1"),
+            ],
+        ),
+        (
+            "Yellow",
+            vec![
+                ("gold", "#ffd700"),
+                ("yellow", "#ffff00"),
+                ("lightyellow", "#ffffe0"),
+                ("lemonchiffon", "#fffacd"),
+                ("lightgoldenrodyellow", "#fafad2"),
+                ("papayawhip", "#ffefd5"),
+                ("moccasin", "#ffe4b5"),
+                ("peachpuff", "#ffdab9"),
+                ("palegoldenrod", "#eee8aa"),
+                ("khaki", "#f0e68c"),
+                ("darkkhaki", "#bdb76b"),
+            ],
+        ),
+    ]
+    .iter()
+    .map(|(name, colors)| {
+        (
+            name.to_string(),
+            colors
+                .iter()
+                .map(|(color, hex)| (color.to_string(), hex.to_string()))
+                .collect(),
+        )
+    })
+    .collect()
+}
diff --git a/src/main.rs b/src/main.rs
index 95bd397a..3bea6098 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,6 +7,7 @@ mod align;
 mod ansi;
 mod cli;
 mod color;
+mod colors;
 mod config;
 mod delta;
 mod edits;
@@ -93,6 +94,9 @@ fn run_app() -> std::io::Result<i32> {
     } else if opt.show_themes {
         subcommands::show_themes::show_themes(opt.dark, opt.light, opt.computed.is_light_mode)?;
         return Ok(0);
+    } else if opt.show_colors {
+        subcommands::show_colors::show_colors()?;
+        return Ok(0);
     }
 
     let _show_config = opt.show_config;
diff --git a/src/options/set.rs b/src/options/set.rs
index 8bd01508..faa2398b 100644
--- a/src/options/set.rs
+++ b/src/options/set.rs
@@ -186,6 +186,7 @@ pub fn set_options(
             plus_non_emph_style,
             raw,
             relative_paths,
+            show_colors,
             show_themes,
             side_by_side,
             wrap_max_lines,
diff --git a/src/subcommands/mod.rs b/src/subcommands/mod.rs
index f115910f..7669375e 100644
--- a/src/subcommands/mod.rs
+++ b/src/subcommands/mod.rs
@@ -1,6 +1,7 @@
 pub mod diff;
 pub mod list_syntax_themes;
 mod sample_diff;
+pub mod show_colors;
 pub mod show_config;
 pub mod show_syntax_themes;
 pub mod show_themes;
diff --git a/src/subcommands/show_colors.rs b/src/subcommands/show_colors.rs
new file mode 100644
index 00000000..fd194377
--- /dev/null
+++ b/src/subcommands/show_colors.rs
@@ -0,0 +1,73 @@
+use crate::cli;
+use crate::color;
+use crate::colors;
+use crate::config;
+use crate::delta;
+use crate::git_config;
+use crate::paint;
+use crate::paint::BgShouldFill;
+use crate::style;
+use crate::utils::bat::assets::HighlightingAssets;
+use crate::utils::bat::output::{OutputType, PagingMode};
+
+#[cfg(not(tarpaulin_include))]
+pub fn show_colors() -> std::io::Result<()> {
+    use itertools::Itertools;
+
+    let assets = HighlightingAssets::new();
+    let opt = cli::Opt::from_args_and_git_config(git_config::GitConfig::try_create(), assets);
+    let config = config::Config::from(opt);
+
+    let mut output_type =
+        OutputType::from_mode(PagingMode::QuitIfOneScreen, None, &config).unwrap();
+    let writer = output_type.handle().unwrap();
+
+    let mut painter = paint::Painter::new(writer, &config);
+    painter.set_syntax(Some("ts"));
+    painter.set_highlighter();
+
+    let title_style = ansi_term::Style::new().bold();
+    let mut style = style::Style {
+        is_syntax_highlighted: true,
+        ..style::Style::default()
+    };
+    for (group, color_names) in colors::color_groups().iter().sorted() {
+        writeln!(painter.writer, "\n\n{}\n", title_style.paint(group))?;
+        for (color_name, hex) in color_names {
+            // Two syntax-highlighted lines without background color
+            style.ansi_term_style.background = None;
+            for line in [
+                r#"export function color(): string {{ return "none" }}"#,
+                r#"export function hex(): string {{ return "none" }}"#,
+            ] {
+                painter.syntax_highlight_and_paint_line(
+                    line,
+                    paint::StyleSectionSpecifier::Style(style),
+                    delta::State::HunkZero,
+                    BgShouldFill::default(),
+                )
+            }
+            // Two syntax-highlighted lines with background color
+            let color =
+                color::parse_color(color_name, config.true_color, config.git_config.as_ref())
+                    .unwrap();
+            style.ansi_term_style.background = Some(color);
+            for line in [
+                &format!(
+                    r#"export function color(): string {{ return "{}" }}"#,
+                    color_name
+                ),
+                &format!(r#"export function hex(): string {{ return "{}" }}"#, hex),
+            ] {
+                painter.syntax_highlight_and_paint_line(
+                    line,
+                    paint::StyleSectionSpecifier::Style(style),
+                    delta::State::HunkZero,
+                    BgShouldFill::default(),
+                )
+            }
+            painter.emit()?;
+        }
+    }
+    Ok(())
+}