From 966fbc59849701dc56f70af406444c351bc9f54a Mon Sep 17 00:00:00 2001
From: Gokul Soumya
Date: Thu, 3 Feb 2022 13:41:25 +0530
Subject: Add tree-sitter based function, class navigation

---
 helix-term/src/commands.rs | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 helix-term/src/keymap.rs   |  6 ++++++
 2 files changed, 58 insertions(+)

(limited to 'helix-term')

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 1454a93f..10c18a85 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -398,6 +398,12 @@ impl MappableCommand {
         surround_delete, "Surround delete",
         select_textobject_around, "Select around object",
         select_textobject_inner, "Select inside object",
+        goto_next_function, "Goto next function",
+        goto_prev_function, "Goto previous function",
+        goto_next_class, "Goto next class",
+        goto_prev_class, "Goto previous class",
+        goto_next_parameter, "Goto next parameter",
+        goto_prev_parameter, "Goto previous parameter",
         dap_launch, "Launch debug target",
         dap_toggle_breakpoint, "Toggle breakpoint",
         dap_continue, "Continue program execution",
@@ -5907,6 +5913,52 @@ fn scroll_down(cx: &mut Context) {
     scroll(cx, cx.count(), Direction::Forward);
 }
 
+fn goto_ts_object_impl(cx: &mut Context, object: &str, direction: Direction) {
+    let count = cx.count();
+    let (view, doc) = current!(cx.editor);
+    let text = doc.text().slice(..);
+    let range = doc.selection(view.id).primary();
+
+    let new_range = match doc.language_config().zip(doc.syntax()) {
+        Some((lang_config, syntax)) => movement::goto_treesitter_object(
+            text,
+            range,
+            object,
+            direction,
+            syntax.tree().root_node(),
+            lang_config,
+            count,
+        ),
+        None => range,
+    };
+
+    doc.set_selection(view.id, Selection::single(new_range.anchor, new_range.head));
+}
+
+fn goto_next_function(cx: &mut Context) {
+    goto_ts_object_impl(cx, "function", Direction::Forward)
+}
+
+fn goto_prev_function(cx: &mut Context) {
+    goto_ts_object_impl(cx, "function", Direction::Backward)
+}
+
+fn goto_next_class(cx: &mut Context) {
+    goto_ts_object_impl(cx, "class", Direction::Forward)
+}
+
+fn goto_prev_class(cx: &mut Context) {
+    goto_ts_object_impl(cx, "class", Direction::Backward)
+}
+
+fn goto_next_parameter(cx: &mut Context) {
+    goto_ts_object_impl(cx, "parameter", Direction::Forward)
+}
+
+fn goto_prev_parameter(cx: &mut Context) {
+    goto_ts_object_impl(cx, "parameter", Direction::Backward)
+}
+
 fn select_textobject_around(cx: &mut Context) {
     select_textobject(cx, textobject::TextObject::Around);
 }
diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs
index fc90da33..f414f797 100644
--- a/helix-term/src/keymap.rs
+++ b/helix-term/src/keymap.rs
@@ -572,11 +572,17 @@ impl Default for Keymaps {
             "[" => { "Left bracket"
                 "d" => goto_prev_diag,
                 "D" => goto_first_diag,
+                "f" => goto_prev_function,
+                "c" => goto_prev_class,
+                "p" => goto_prev_parameter,
                 "space" => add_newline_above,
             },
             "]" => { "Right bracket"
                 "d" => goto_next_diag,
                 "D" => goto_last_diag,
+                "f" => goto_next_function,
+                "c" => goto_next_class,
+                "p" => goto_next_parameter,
                 "space" => add_newline_below,
             },
 
-- 
cgit v1.2.3-70-g09d2