add line highlight

src/printer.rs

@@ -7,6 +7,7 @@ use ansi_term::Style;
 use console::AnsiCodeIterator;
 
 use syntect::easy::HighlightLines;
+use syntect::highlighting::Color;
 use syntect::highlighting::Theme;
 use syntect::parsing::SyntaxSet;
 
@@ -79,6 +80,7 @@ pub struct InteractivePrinter<'a> {
     pub line_changes: Option<LineChanges>,
     highlighter: Option<HighlightLines<'a>>,
     syntax_set: &'a SyntaxSet,
+    background_highlight: Option<Color>,
 }
 
 impl<'a> InteractivePrinter<'a> {
@@ -90,6 +92,8 @@ impl<'a> InteractivePrinter<'a> {
     ) -> Self {
         let theme = assets.get_theme(&config.theme);
 
+        let background_highlight = theme.settings.line_highlight;
+
         let colors = if config.colored_output {
             Colors::colored(theme, config.true_color)
         } else {
@@ -156,6 +160,7 @@ impl<'a> InteractivePrinter<'a> {
             line_changes,
             highlighter,
             syntax_set: &assets.syntax_set,
+            background_highlight,
         }
     }
 
@@ -296,6 +301,18 @@ impl<'a> Printer for InteractivePrinter<'a> {
             }
         }
 
+        // Line highlighting
+        let background = match self.config.highlight_line {
+            Some(line) => {
+                if line_number == line {
+                    self.background_highlight
+                } else {
+                    None
+                }
+             }
+            _ => None
+        };
+
         // Line contents.
         if self.config.output_wrap == OutputWrap::None {
             let true_color = self.config.true_color;
@@ -306,7 +323,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
                 write!(
                     handle,
                     "{}",
-                    as_terminal_escaped(style, &*text, true_color, colored_output,)
+                    as_terminal_escaped(style, &*text, true_color, colored_output, background)
                 )?;
             }
 
@@ -362,6 +379,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
                                             ),
                                             self.config.true_color,
                                             self.config.colored_output,
+                                            background
                                         )
                                     )?;
                                     break;
@@ -401,6 +419,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
                                         ),
                                         self.config.true_color,
                                         self.config.colored_output,
+                                        background
                                     ),
                                     panel_wrap.clone().unwrap()
                                 )?;