From b65565adfa0ecb4454b17d6346f4b73233e58877 Mon Sep 17 00:00:00 2001
From: Shaun Reed <shaunrd0@gmail.com>
Date: Sat, 17 Jan 2026 15:07:05 -0500
Subject: [PATCH] [tui] Add Explorer widget for left panel.

---
 Cargo.lock          | 13 ++++++++++
 Cargo.toml          |  2 ++
 src/tui.rs          |  1 +
 src/tui/app.rs      | 19 +++++++--------
 src/tui/explorer.rs | 58 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 82 insertions(+), 11 deletions(-)
 create mode 100644 src/tui/explorer.rs

diff --git a/Cargo.lock b/Cargo.lock
index 1d9d0f3..86a6948 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -230,6 +230,8 @@ dependencies = [
  "ratatui",
  "structopt",
  "syntect",
+ "tui-tree-widget",
+ "uuid",
 ]
 
 [[package]]
@@ -1908,6 +1910,17 @@ dependencies = [
  "time-core",
 ]
 
+[[package]]
+name = "tui-tree-widget"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "deca119555009eee2e0cfb9c020f39f632444dc4579918d5fc009d51d75dff92"
+dependencies = [
+ "ratatui-core",
+ "ratatui-widgets",
+ "unicode-width 0.2.2",
+]
+
 [[package]]
 name = "typenum"
 version = "1.19.0"
diff --git a/Cargo.toml b/Cargo.toml
index 4db63bb..0f88e17 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,8 @@ syntect = "5.2.0"
 structopt = "0.3.26"
 ratatui = "0.30.0"
 anyhow = "1.0.100"
+tui-tree-widget = "0.24.0"
+uuid = { version = "1.19.0", features = ["v4"] }
 
 [build-dependencies]
 # The link_qt_object_files feature is required for statically linking Qt 6.
diff --git a/src/tui.rs b/src/tui.rs
index 3ba419d..98229c0 100644
--- a/src/tui.rs
+++ b/src/tui.rs
@@ -1,4 +1,5 @@
 pub mod app;
+mod explorer;
 
 use anyhow::{Context, Result};
 
diff --git a/src/tui/app.rs b/src/tui/app.rs
index 1d24d6a..7ee8b14 100644
--- a/src/tui/app.rs
+++ b/src/tui/app.rs
@@ -8,14 +8,18 @@ use ratatui::widgets::{Block, Borders, Padding, Paragraph, Tabs, Wrap};
 use ratatui::{DefaultTerminal, symbols};
 use std::time::Duration;
 
+use crate::tui::explorer::Explorer;
+
 #[derive(Debug, Clone, Copy)]
 pub struct App<'a> {
-    root_path: &'a std::path::Path,
+    explorer: Explorer<'a>,
 }
 
 impl<'a> App<'a> {
     pub(crate) fn new(root_path: &'a std::path::Path) -> Self {
-        Self { root_path }
+        Self {
+            explorer: Explorer::new(root_path),
+        }
     }
 
     pub fn run(mut self, mut terminal: DefaultTerminal) -> anyhow::Result<()> {
@@ -84,7 +88,7 @@ impl<'a> App<'a> {
     fn draw_terminal(self, area: Rect, buf: &mut Buffer) {
         // TODO: Title should be detected shell name
         // TODO: Contents should be shell output
-        Paragraph::new("Terminal placeholder")
+        Paragraph::new("shaun@pc:~/Code/clide$ ")
             .style(Style::default())
             .block(
                 Block::default()
@@ -95,13 +99,6 @@ impl<'a> App<'a> {
             .wrap(Wrap { trim: false })
             .render(area, buf);
     }
-
-    fn draw_file_explorer(self, area: Rect, buf: &mut Buffer) {
-        Paragraph::new("File explorer placeholder")
-            .style(Style::default())
-            .block(Block::default().borders(Borders::ALL))
-            .render(area, buf);
-    }
 }
 
 // TODO: Separate complex components into their own widgets.
@@ -138,7 +135,7 @@ impl<'a> Widget for App<'a> {
         self.draw_status(vertical[0], buf);
         self.draw_terminal(vertical[2], buf);
 
-        self.draw_file_explorer(horizontal[0], buf);
+        self.explorer.draw(horizontal[0], buf);
 
         self.draw_tabs(editor_layout[0], buf);
         self.draw_editor(editor_layout[1], buf);
diff --git a/src/tui/explorer.rs b/src/tui/explorer.rs
new file mode 100644
index 0000000..5be7736
--- /dev/null
+++ b/src/tui/explorer.rs
@@ -0,0 +1,58 @@
+use std::fs;
+use ratatui::buffer::Buffer;
+use ratatui::layout::Rect;
+use ratatui::prelude::Style;
+use ratatui::widgets::{Block, Borders, Widget};
+use tui_tree_widget::{Tree, TreeItem};
+use uuid::Uuid;
+
+#[derive(Clone, Copy, Debug)]
+pub struct Explorer<'a> {
+    root_path: &'a std::path::Path,
+}
+
+impl<'a> Explorer<'a> {
+    pub fn new(path: &'a std::path::Path) -> Self {
+        Explorer { root_path: path }
+    }
+
+    pub fn draw(self, area: Rect, buf: &mut Buffer) {
+        let tree_item = Self::build_tree_from_path(self.root_path.to_path_buf());
+        Tree::new(&tree_item.children())
+            .expect("Failed to build tree.")
+            .style(Style::default())
+            .block(Block::default().borders(Borders::ALL))
+            .render(area, buf);
+    }
+
+    fn build_tree_from_path(path: std::path::PathBuf) -> TreeItem<'static, String> {
+        let mut children = vec![];
+        if let Ok(entries) = fs::read_dir(&path) {
+            let mut paths = entries
+                .map(|res| res.map(|e| e.path()))
+                .collect::<Result<Vec<_>, std::io::Error>>()
+                .expect("");
+            paths.sort();
+            for path in paths {
+                if path.is_dir() {
+                    children.push(Self::build_tree_from_path(path));
+                } else {
+                    children.push(TreeItem::new_leaf(
+                        Uuid::new_v4().to_string(),
+                        path.file_name().unwrap().to_string_lossy().to_string(),
+                    ));
+                }
+            }
+        }
+
+        TreeItem::new(
+            Uuid::new_v4().to_string(),
+            path.file_name()
+                .unwrap_or_default()
+                .to_string_lossy()
+                .to_string(),
+            children,
+        )
+            .expect("Failed to build tree from path.")
+    }
+}