Add file explorer and tree helper

ref: https://github.com/helix-editor/helix/issues/200
ref: https://github.com/helix-editor/helix/pull/2377
ref: https://github.com/helix-editor/helix/pull/5566
ref: https://github.com/helix-editor/helix/pull/5768

Co-authored-by: cossonleo <cossonleo@foxmail.com>
Co-authored-by: JJ <git@toki.la>
Co-authored-by: Quan Tong <quantonganh@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index d545480b..5c59962d 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -507,6 +507,8 @@ impl MappableCommand {
         command_palette, "Open command palette",
         goto_word, "Jump to a two-character label",
         extend_to_word, "Extend to a two-character label",
+        open_or_focus_explorer, "Open or focus explorer",
+        reveal_current_file, "Reveal current file in explorer",
     );
 }
 
@@ -2834,6 +2836,49 @@ fn file_picker_in_current_directory(cx: &mut Context) {
     cx.push_layer(Box::new(overlaid(picker)));
 }
 
+fn open_or_focus_explorer(cx: &mut Context) {
+    cx.callback.push(Box::new(
+        |compositor: &mut Compositor, cx: &mut compositor::Context| {
+            if let Some(editor) = compositor.find::<ui::EditorView>() {
+                match editor.explorer.as_mut() {
+                    Some(explore) => explore.focus(),
+                    None => match ui::Explorer::new(cx) {
+                        Ok(explore) => editor.explorer = Some(explore),
+                        Err(err) => cx.editor.set_error(format!("{}", err)),
+                    },
+                }
+            }
+        },
+    ));
+}
+
+fn reveal_file_in_explorer(cx: &mut Context, path: Option<PathBuf>) {
+    cx.callback.push(Box::new(
+        |compositor: &mut Compositor, cx: &mut compositor::Context| {
+            if let Some(editor) = compositor.find::<ui::EditorView>() {
+                (|| match editor.explorer.as_mut() {
+                    Some(explorer) => match path {
+                        Some(path) => explorer.reveal_file(path),
+                        None => explorer.reveal_current_file(cx),
+                    },
+                    None => {
+                        editor.explorer = Some(ui::Explorer::new(cx)?);
+                        if let Some(explorer) = editor.explorer.as_mut() {
+                            explorer.reveal_current_file(cx)?;
+                        }
+                        Ok(())
+                    }
+                })()
+                .unwrap_or_else(|err| cx.editor.set_error(err.to_string()))
+            }
+        },
+    ));
+}
+
+fn reveal_current_file(cx: &mut Context) {
+    reveal_file_in_explorer(cx, None)
+}
+
 fn buffer_picker(cx: &mut Context) {
     let current = view!(cx.editor).doc;