buffer as a feature

client/src/buffer/ui.rs

@@ -0,0 +1,80 @@
+// src/buffer/ui.rs
+
+use crate::config::colors::themes::Theme;
+use crate::buffer::state::BufferState;
+use crate::state::app::state::AppState;  // Add this import
+use ratatui::{
+    layout::{Alignment, Rect},
+    style::Style,
+    text::{Line, Span},
+    widgets::Paragraph,
+    Frame,
+};
+use unicode_width::UnicodeWidthStr;
+use crate::buffer::functions::get_view_layer;
+
+pub fn render_buffer_list(
+    f: &mut Frame,
+    area: Rect,
+    theme: &Theme,
+    buffer_state: &BufferState,
+    app_state: &AppState,
+) {
+    // --- Style Definitions ---
+    let active_style = Style::default()
+        .fg(theme.bg)
+        .bg(theme.highlight);
+
+    let inactive_style = Style::default()
+        .fg(theme.fg)
+        .bg(theme.bg);
+
+    // --- Determine Active Layer ---
+    let active_layer = match buffer_state.history.get(buffer_state.active_index) {
+        Some(view) => get_view_layer(view),
+        None => 1,
+    };
+
+    // --- Create Spans ---
+    let mut spans = Vec::new();
+    let mut current_width = 0;
+
+    let current_table_name = app_state.current_view_table_name.as_deref();
+
+    for (original_index, view) in buffer_state.history.iter().enumerate() {
+        // Filter: Only process views matching the active layer
+        if get_view_layer(view) != active_layer {
+            continue;
+        }
+
+        let is_active = original_index == buffer_state.active_index;
+        let buffer_name = view.display_name_with_context(current_table_name);
+        let buffer_text = format!(" {} ", buffer_name);
+        let text_width = UnicodeWidthStr::width(buffer_text.as_str());
+
+        // Calculate width needed for this buffer (separator + text)
+        let needed_width = text_width;
+        if current_width + needed_width > area.width as usize {
+            break;
+        }
+
+        // Add the buffer text itself
+        let text_style = if is_active { active_style } else { inactive_style };
+        spans.push(Span::styled(buffer_text, text_style));
+        current_width += text_width;
+    }
+
+    // --- Filler Span ---
+    let remaining_width = area.width.saturating_sub(current_width as u16);
+    if !spans.is_empty() || remaining_width > 0 {
+        spans.push(Span::styled(
+                " ".repeat(remaining_width as usize),
+                inactive_style,
+        ));
+    }
+
+    // --- Render ---
+    let buffer_line = Line::from(spans);
+    let paragraph = Paragraph::new(buffer_line).alignment(Alignment::Left);
+    f.render_widget(paragraph, area);
+}