Add config option to change selection color

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Dynamic title support on Windows
 - Ability to specify starting position with the `--position` flag
 - New configuration field `window.position` allows specifying the starting position
+- Added the ability to change the selection color
 
 ### Fixed
 

alacritty.yml

@@ -184,6 +184,15 @@ colors:
   #cursor:
   #  text: '0x000000'
   #  cursor: '0xffffff'
+  
+  # Selection colors
+  #
+  # Colors which should be used to draw the selection area. If selection 
+  # background is unset, selection color will be the inverse of the cell colors. 
+  # If only text is unset the cell text color will remain the same.
+  #selection:
+  #  text: '0xeaeaea'
+  #  background: '0x404040'
 
   # Normal colors
   normal:

src/config/mod.rs

@@ -1285,6 +1285,8 @@ pub struct Colors {
     pub primary: PrimaryColors,
     #[serde(deserialize_with = "failure_default")]
     pub cursor: CursorColors,
+    #[serde(deserialize_with = "failure_default")]
+    pub selection: SelectionColors,
     #[serde(deserialize_with = "deserialize_normal_colors")]
     pub normal: AnsiColors,
     #[serde(deserialize_with = "deserialize_bright_colors")]
@@ -1300,6 +1302,7 @@ impl Default for Colors {
         Colors {
             primary: Default::default(),
             cursor: Default::default(),
+            selection: Default::default(),
             normal: default_normal_colors(),
             bright: default_bright_colors(),
             dim: Default::default(),
@@ -1421,6 +1424,15 @@ pub struct CursorColors {
     pub cursor: Option<Rgb>,
 }
 
+#[serde(default)]
+#[derive(Debug, Copy, Clone, Default, Deserialize, PartialEq, Eq)]
+pub struct SelectionColors {
+    #[serde(deserialize_with = "deserialize_optional_color")]
+    pub text: Option<Rgb>,
+    #[serde(deserialize_with = "deserialize_optional_color")]
+    pub background: Option<Rgb>,
+}
+
 #[serde(default)]
 #[derive(Debug, Deserialize, PartialEq, Eq)]
 pub struct PrimaryColors {

src/term/mod.rs

@@ -455,17 +455,28 @@ impl<'a> Iterator for RenderableCellsIter<'a> {
                 (cell, selected)
             };
 
-            // Apply inversion and lookup RGB values
+            // Lookup RGB values
             let mut fg_rgb = self.compute_fg_rgb(cell.fg, &cell);
             let mut bg_rgb = self.compute_bg_rgb(cell.bg);
 
-            let bg_alpha = if selected ^ cell.inverse() {
+            let selection_background = self.config.colors().selection.background;
+            let bg_alpha = if let (true, Some(col)) = (selected, selection_background) {
+                // Override selection background with config colors
+                bg_rgb = col;
+                1.0
+            } else if selected ^ cell.inverse() {
+                // Invert cell fg and bg colors
                 mem::swap(&mut fg_rgb, &mut bg_rgb);
                 self.compute_bg_alpha(cell.fg)
             } else {
                 self.compute_bg_alpha(cell.bg)
             };
 
+            // Override selection text with config colors
+            if let (true, Some(col)) = (selected, self.config.colors().selection.text) {
+                fg_rgb = col;
+            }
+
             return Some(RenderableCell {
                 line: cell.line,
                 column: cell.column,