refactor: colors.rs -> ui/colors.rs

src/ui/colors.rs

@@ -0,0 +1,94 @@
+use crate::error;
+use clap::Clap;
+use termion::color;
+
+pub fn parse_color(src: &str) -> Result<Box<dyn color::Color>, error::ParseError> {
+    match src {
+        "black" => Ok(Box::new(color::Black)),
+        "red" => Ok(Box::new(color::Red)),
+        "green" => Ok(Box::new(color::Green)),
+        "yellow" => Ok(Box::new(color::Yellow)),
+        "blue" => Ok(Box::new(color::Blue)),
+        "magenta" => Ok(Box::new(color::Magenta)),
+        "cyan" => Ok(Box::new(color::Cyan)),
+        "white" => Ok(Box::new(color::White)),
+        "bright-black" => Ok(Box::new(color::LightBlack)),
+        "bright-red" => Ok(Box::new(color::LightRed)),
+        "bright-green" => Ok(Box::new(color::LightGreen)),
+        "bright-yellow" => Ok(Box::new(color::LightYellow)),
+        "bright-blue" => Ok(Box::new(color::LightBlue)),
+        "bright-magenta" => Ok(Box::new(color::LightMagenta)),
+        "bright-cyan" => Ok(Box::new(color::LightCyan)),
+        "bright-white" => Ok(Box::new(color::LightWhite)),
+        // "default" => Ok(Box::new(color::Reset)),
+        _ => Err(error::ParseError::UnknownColor),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn match_color() {
+        let text1 = format!(
+            "{}{}",
+            color::Fg(parse_color("green").unwrap().as_ref()),
+            "foo"
+        );
+        let text2 = format!("{}{}", color::Fg(color::Green), "foo");
+
+        assert_eq!(text1, text2);
+    }
+
+    #[test]
+    fn no_match_color() {
+        assert!(parse_color("wat").is_err(), "this color should not exist");
+    }
+}
+
+/// Holds color-related data, for clarity.
+///
+/// - `focus_*` colors are used to render the currently focused matched text.
+/// - `normal_*` colors are used to render other matched text.
+/// - `hint_*` colors are used to render the hints.
+#[derive(Clap, Debug)]
+pub struct UiColors {
+    /// Foreground color for base text.
+    #[clap(long, default_value = "bright-cyan", parse(try_from_str = parse_color))]
+    pub text_fg: Box<dyn color::Color>,
+
+    /// Background color for base text.
+    #[clap(long, default_value = "bright-white", parse(try_from_str = parse_color))]
+    pub text_bg: Box<dyn color::Color>,
+
+    /// Foreground color for matches.
+    #[clap(long, default_value = "yellow",
+                parse(try_from_str = parse_color))]
+    pub match_fg: Box<dyn color::Color>,
+
+    /// Background color for matches.
+    #[clap(long, default_value = "bright-white",
+                parse(try_from_str = parse_color))]
+    pub match_bg: Box<dyn color::Color>,
+
+    /// Foreground color for the focused match.
+    #[clap(long, default_value = "magenta",
+                parse(try_from_str = parse_color))]
+    pub focused_fg: Box<dyn color::Color>,
+
+    /// Background color for the focused match.
+    #[clap(long, default_value = "bright-white",
+                parse(try_from_str = parse_color))]
+    pub focused_bg: Box<dyn color::Color>,
+
+    /// Foreground color for hints.
+    #[clap(long, default_value = "white",
+                parse(try_from_str = parse_color))]
+    pub hint_fg: Box<dyn color::Color>,
+
+    /// Background color for hints.
+    #[clap(long, default_value = "magenta",
+                parse(try_from_str = parse_color))]
+    pub hint_bg: Box<dyn color::Color>,
+}