fix home/end buttons on diff and add home button on file list (#43)

Author: Stephan Dilly

src/components/changes.rs

@@ -358,6 +358,12 @@ impl Component for ChangesComponent {
                     keys::MOVE_UP => {
                         self.move_selection(MoveSelection::Up)
                     }
+                    keys::HOME => {
+                        self.move_selection(MoveSelection::Home)
+                    }
+                    keys::SHIFT_UP => {
+                        self.move_selection(MoveSelection::Home)
+                    }
                     keys::MOVE_LEFT => {
                         self.move_selection(MoveSelection::Left)
                     }

src/components/diff.rs

@@ -374,11 +374,19 @@ impl Component for DiffComponent {
                         self.scroll(ScrollType::Down);
                         true
                     }
-                    KeyCode::End | KeyCode::Down if has_shift => {
+                    KeyCode::Down if has_shift => {
                         self.scroll(ScrollType::End);
                         true
                     }
-                    KeyCode::Home | KeyCode::Up if has_shift => {
+                    KeyCode::End => {
+                        self.scroll(ScrollType::End);
+                        true
+                    }
+                    KeyCode::Up if has_shift => {
+                        self.scroll(ScrollType::Home);
+                        true
+                    }
+                    KeyCode::Home => {
                         self.scroll(ScrollType::Home);
                         true
                     }

src/components/statustree.rs

@@ -18,8 +18,10 @@ pub enum MoveSelection {
     Down,
     Left,
     Right,
+    Home,
 }
 
+#[derive(Copy, Clone, Debug)]
 struct SelectionChange {
     new_index: usize,
     changes: bool,
@@ -70,13 +72,15 @@ impl StatusTree {
                 MoveSelection::Right => {
                     self.selection_right(selection)
                 }
+                MoveSelection::Home => SelectionChange::new(0, false),
             };
 
-            let changed = selection_change.new_index != selection;
+            let changed_index =
+                selection_change.new_index != selection;
 
             self.selection = Some(selection_change.new_index);
 
-            changed || selection_change.changes
+            changed_index || selection_change.changes
         } else {
             false
         }

src/keys.rs

@@ -27,8 +27,11 @@ pub const OPEN_COMMIT: KeyEvent = no_mod(KeyCode::Char('c'));
 pub const OPEN_HELP: KeyEvent = no_mod(KeyCode::Char('h'));
 pub const MOVE_LEFT: KeyEvent = no_mod(KeyCode::Left);
 pub const MOVE_RIGHT: KeyEvent = no_mod(KeyCode::Right);
+pub const HOME: KeyEvent = no_mod(KeyCode::Home);
 pub const MOVE_UP: KeyEvent = no_mod(KeyCode::Up);
 pub const MOVE_DOWN: KeyEvent = no_mod(KeyCode::Down);
+pub const SHIFT_UP: KeyEvent =
+    with_mod(KeyCode::Up, KeyModifiers::SHIFT);
 pub const STATUS_STAGE_FILE: KeyEvent = no_mod(KeyCode::Enter);
 pub const STATUS_RESET_FILE: KeyEvent =
     with_mod(KeyCode::Char('D'), KeyModifiers::SHIFT);