tab bar

src/app/widget.rs

@@ -1,8 +1,37 @@
-use ratatui::{layout::Rect, widgets::Widget};
-use crate::app::App;
+use ratatui::{layout::Rect, style::{Color, Stylize}, text::{Line, Span}, widgets::Widget};
+use crate::{app::App, buffer::Buffer, custom_greys::CustomGreys};
 
 impl Widget for &App {
 	fn render(self, area: Rect, buf: &mut ratatui::buffer::Buffer) {
-		self.current_buffer().render(area, buf);
+		if self.buffers.len() == 1 {
+			self.current_buffer().render(area, buf);
+		} else {
+			let tab_bar_area =  Rect::new(area.x, area.y, area.width, 1);
+			self.render_tab_bar().render(tab_bar_area, buf);
+			
+			let buffer_area = Rect::new(area.x, area.y + 1, area.width, area.height - 1);
+			self.current_buffer().render(buffer_area, buf);
+		}
+	}
+}
+
+impl App {
+	fn render_tab_bar(&self) -> Line<'static> {
+		self.buffers
+			.iter()
+			.enumerate()
+			.map(|(index, buffer)| self.tab_for(buffer, index == self.current_buffer_index))
+			.collect()
+	}
+	
+	fn tab_for(&self, buffer: &Buffer, is_active: bool) -> Span<'static> {
+		let background = if is_active {
+			Color::select_grey()
+		} else {
+			Color::ui_grey()
+		};
+		
+		Span::from(format!(" {} ", buffer.file_name))
+			.bg(background)
 	}
 }