Add bright foreground color option

It was requested in alacritty#825 that it should be possible to
add an optional bright foreground color.

This is now added to the primary colors structure and allows the user to
set a foreground color for bold normal text. This has no effect unless
the `draw_bold_text_with_bright_colors` option is also enabled.

If the color is not specified, the bright foreground color will fall
back to the normal foreground color.

alacritty.yml

@@ -111,6 +111,7 @@ colors:
   primary:
     background: '0x000000'
     foreground: '0xeaeaea'
+    bright_foreground: '0xeaeaea'
 
   # Colors the cursor will use if `custom_cursor_colors` is true
   cursor:

alacritty_macos.yml

@@ -91,6 +91,7 @@ colors:
   primary:
     background: '0x000000'
     foreground: '0xeaeaea'
+    bright_foreground: '0xeaeaea'
 
   # Colors the cursor will use if `custom_cursor_colors` is true
   cursor:

src/ansi.rs

@@ -536,6 +536,8 @@ pub enum NamedColor {
     BrightWhite,
     /// The foreground color
     Foreground = 256,
+    /// The bright foreground color
+    BrightForeground,
     /// The background color
     Background,
     /// Color for the text under the cursor
@@ -563,6 +565,7 @@ pub enum NamedColor {
 impl NamedColor {
     pub fn to_bright(&self) -> Self {
         match *self {
+            NamedColor::Foreground => NamedColor::BrightForeground,
             NamedColor::Black => NamedColor::BrightBlack,
             NamedColor::Red => NamedColor::BrightRed,
             NamedColor::Green => NamedColor::BrightGreen,

src/config.rs

@@ -1017,13 +1017,32 @@ pub struct PrimaryColors {
     pub background: Rgb,
     #[serde(deserialize_with = "rgb_from_hex")]
     pub foreground: Rgb,
+    #[serde(default, deserialize_with = "deserialize_bright_foreground")]
+    pub bright_foreground: Option<Rgb>,
+}
+
+fn deserialize_bright_foreground<'a, D>(deserializer: D) -> ::std::result::Result<Option<Rgb>, D::Error>
+    where D: de::Deserializer<'a>
+{
+    match Option::deserialize(deserializer) {
+        Ok(Some(color)) => {
+            let color: serde_yaml::Value = color;
+            Ok(Some(rgb_from_hex(color).unwrap()))
+        },
+        Ok(None) => Ok(None),
+        Err(err) => {
+            eprintln!("problem with config: {}; Using foreground color", err);
+            Ok(None)
+        },
+    }
 }
 
 impl Default for PrimaryColors {
     fn default() -> Self {
         PrimaryColors {
             background: Rgb { r: 0, g: 0, b: 0 },
             foreground: Rgb { r: 0xea, g: 0xea, b: 0xea },
+            bright_foreground: None,
         }
     }
 }

src/term/color.rs

@@ -4,7 +4,7 @@ use std::fmt;
 use {Rgb, ansi};
 use config::Colors;
 
-pub const COUNT: usize = 268;
+pub const COUNT: usize = 269;
 
 /// List of indexed colors
 ///
@@ -50,6 +50,10 @@ impl List {
         self[ansi::NamedColor::BrightMagenta] = colors.bright.magenta;
         self[ansi::NamedColor::BrightCyan]    = colors.bright.cyan;
         self[ansi::NamedColor::BrightWhite]   = colors.bright.white;
+        self[ansi::NamedColor::BrightForeground] = colors
+            .primary
+            .bright_foreground
+            .unwrap_or(colors.primary.foreground);
 
         // Foreground and background
         self[ansi::NamedColor::Foreground] = colors.primary.foreground;