Highlighting single characters

src/filetype.rs

@@ -7,6 +7,7 @@ pub struct FileType {
 pub struct HighlightingOptions {
     numbers: bool,
     strings: bool,
+    characters: bool,
 }
 
 impl Default for FileType {
@@ -34,6 +35,7 @@ impl FileType {
                 hl_opts: HighlightingOptions {
                     numbers: true,
                     strings: true,
+                    characters: true,
                 },
             };
         }
@@ -50,4 +52,8 @@ impl HighlightingOptions {
     pub fn strings(self) -> bool {
         self.strings
     }
+
+    pub fn characters(self) -> bool {
+        self.characters
+    }
 }

src/highlighting.rs

@@ -6,6 +6,7 @@ pub enum Type {
     Number,
     Match,
     String,
+    Character,
 }
 
 impl Type {
@@ -14,6 +15,7 @@ impl Type {
             Type::Number => color::Rgb(220, 163, 163),
             Type::Match => color::Rgb(38, 139, 210),
             Type::String => color::Rgb(211, 54, 130),
+            Type::Character => color::Rgb(108, 113, 196),
             _ => color::Rgb(255, 255, 255),
         }
     }

src/row.rs

@@ -232,6 +232,33 @@ impl Row {
                 &highlighting::Type::None
             };
 
+            if opts.characters() && !in_string && *c == '\'' {
+                prev_is_separator = true;
+
+                if let Some(next_char) = chars.get(index.saturating_add(1)) {
+                    let closing_index = if *next_char == '\\' {
+                        index.saturating_add(3)
+                    } else {
+                        index.saturating_add(2)
+                    };
+
+                    if let Some(closing_char) = chars.get(closing_index) {
+                        if *closing_char == '\'' {
+                            for _ in 0..=closing_index.saturating_sub(index) {
+                                highlighting.push(highlighting::Type::Character);
+                                index += 1;
+                            }
+
+                            continue;
+                        }
+                    }
+                }
+
+                highlighting.push(highlighting::Type::None);
+                index += 1;
+                continue;
+            }
+
             if opts.strings() {
                 if in_string {
                     highlighting.push(highlighting::Type::String);