Add support for hex colors

Cargo.lock

@@ -164,6 +164,7 @@ version = "0.5.0"
 dependencies = [
  "base64",
  "clap",
+ "lazy_static",
  "regex",
  "termion",
  "unicode-width",

Cargo.toml

@@ -14,6 +14,7 @@ regex = "1.3.1"
 clap = "2.33.0"
 base64 = "0.11.0"
 unicode-width = "0.1.7"
+lazy_static = "1.4.0"
 
 [[bin]]
 name = "thumbs"

src/colors.rs

@@ -1,6 +1,19 @@
+use regex::Regex;
 use termion::color;
 
 pub fn get_color(color_name: &str) -> Box<dyn color::Color> {
+  lazy_static! {
+    static ref RGB: Regex = Regex::new(r"#([[:xdigit:]]{2})([[:xdigit:]]{2})([[:xdigit:]]{2})").unwrap();
+  }
+
+  if let Some(captures) = RGB.captures(color_name) {
+    let r = u8::from_str_radix(captures.get(1).unwrap().as_str(), 16).unwrap();
+    let g = u8::from_str_radix(captures.get(2).unwrap().as_str(), 16).unwrap();
+    let b = u8::from_str_radix(captures.get(3).unwrap().as_str(), 16).unwrap();
+
+    return Box::new(color::Rgb(r, g, b));
+  }
+
   match color_name {
     "black" => Box::new(color::Black),
     "red" => Box::new(color::Red),
@@ -27,6 +40,20 @@ mod tests {
     assert_eq!(text1, text2);
   }
 
+  #[test]
+  fn parse_rgb() {
+    let text1 = println!("{}{}", color::Fg(&*get_color("#1b1cbf")), "foo");
+    let text2 = println!("{}{}", color::Fg(color::Rgb(27, 28, 191)), "foo");
+
+    assert_eq!(text1, text2);
+  }
+
+  #[test]
+  #[should_panic]
+  fn parse_invalid_rgb() {
+    println!("{}{}", color::Fg(&*get_color("#1b1cbj")), "foo");
+  }
+
   #[test]
   #[should_panic]
   fn no_match_color() {

src/main.rs

@@ -1,3 +1,5 @@
+#[macro_use]
+extern crate lazy_static;
 extern crate base64;
 extern crate clap;
 extern crate termion;