Use StyleDiff for widget::Tabs highlight_style as well

examples/demo/ui.rs

@@ -21,7 +21,7 @@ pub fn draw<B: Backend>(f: &mut Frame<B>, app: &mut App) {
         .block(Block::default().borders(Borders::ALL).title(app.title))
         .titles(&app.tabs.titles)
         .style(Style::default().fg(Color::Green))
-        .highlight_style(Style::default().fg(Color::Yellow))
+        .highlight_style_diff(StyleDiff::default().fg(Color::Yellow))
         .select(app.tabs.index);
     f.render_widget(tabs, chunks[0]);
     match app.tabs.index {

examples/tabs.rs

@@ -10,7 +10,7 @@ use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::Altern
 use tui::{
     backend::TermionBackend,
     layout::{Constraint, Direction, Layout},
-    style::{Color, Style},
+    style::{Color, Style, StyleDiff},
     widgets::{Block, Borders, Tabs},
     Terminal,
 };
@@ -52,7 +52,7 @@ fn main() -> Result<(), Box<dyn Error>> {
                 .titles(&app.tabs.titles)
                 .select(app.tabs.index)
                 .style(Style::default().fg(Color::Cyan))
-                .highlight_style(Style::default().fg(Color::Yellow));
+                .highlight_style_diff(StyleDiff::default().fg(Color::Yellow));
             f.render_widget(tabs, chunks[0]);
             let inner = match app.tabs.index {
                 0 => Block::default().title("Inner 0").borders(Borders::ALL),

src/widgets/tabs.rs

@@ -2,7 +2,7 @@ use unicode_width::UnicodeWidthStr;
 
 use crate::buffer::Buffer;
 use crate::layout::Rect;
-use crate::style::Style;
+use crate::style::{Style, StyleDiff};
 use crate::symbols::line;
 use crate::widgets::{Block, Widget};
 
@@ -35,7 +35,7 @@ where
     /// The style used to draw the text
     style: Style,
     /// The style used to display the selected item
-    highlight_style: Style,
+    highlight_style_diff: StyleDiff,
     /// Tab divider
     divider: &'a str,
 }
@@ -50,7 +50,7 @@ where
             titles: &[],
             selected: 0,
             style: Default::default(),
-            highlight_style: Default::default(),
+            highlight_style_diff: Default::default(),
             divider: line::VERTICAL,
         }
     }
@@ -80,8 +80,17 @@ where
         self
     }
 
+    #[deprecated(
+        since = "0.10.0",
+        note = "Use the `highlight_style_diff` method instead"
+    )]
     pub fn highlight_style(mut self, style: Style) -> Tabs<'a, T> {
-        self.highlight_style = style;
+        self.highlight_style_diff = style.into();
+        self
+    }
+
+    pub fn highlight_style_diff(mut self, style: StyleDiff) -> Tabs<'a, T> {
+        self.highlight_style_diff = style;
         self
     }
 
@@ -116,7 +125,7 @@ where
         for (title, style, last_title) in self.titles.iter().enumerate().map(|(i, t)| {
             let lt = i + 1 == titles_length;
             if i == self.selected {
-                (t, self.highlight_style, lt)
+                (t, self.style.patch(self.highlight_style_diff), lt)
             } else {
                 (t, self.style, lt)
             }