Correct the naming issue with vsplit and hsplit being swapped.

helix-term/src/application.rs

@@ -52,10 +52,10 @@ impl Application {
 
         if let Ok(files) = args.values_of_t::<PathBuf>("files") {
             for file in files {
-                editor.open(file, Action::HorizontalSplit)?;
+                editor.open(file, Action::VerticalSplit)?;
             }
         } else {
-            editor.new_file(Action::HorizontalSplit)?;
+            editor.new_file(Action::VerticalSplit)?;
         }
 
         compositor.push(Box::new(ui::EditorView::new()));

helix-term/src/commands.rs

@@ -1854,7 +1854,7 @@ pub fn vsplit(cx: &mut Context) {
     if let Some(path) = path {
         // open the same file again. this will vsplit
         cx.editor
-            .open(path, helix_view::editor::Action::HorizontalSplit);
+            .open(path, helix_view::editor::Action::VerticalSplit);
     }
 }
 

helix-term/src/ui/picker.rs

@@ -168,7 +168,7 @@ impl<T: 'static> Component for Picker<T> {
                 modifiers: KeyModifiers::CONTROL,
             } => {
                 if let Some(option) = self.selection() {
-                    (self.callback_fn)(&mut cx.editor, option, Action::VerticalSplit);
+                    (self.callback_fn)(&mut cx.editor, option, Action::HorizontalSplit);
                 }
                 return close_fn;
             }
@@ -177,7 +177,7 @@ impl<T: 'static> Component for Picker<T> {
                 modifiers: KeyModifiers::CONTROL,
             } => {
                 if let Some(option) = self.selection() {
-                    (self.callback_fn)(&mut cx.editor, option, Action::HorizontalSplit);
+                    (self.callback_fn)(&mut cx.editor, option, Action::VerticalSplit);
                 }
                 return close_fn;
             }

helix-view/src/tree.rs

@@ -70,13 +70,13 @@ impl Container {
 
 impl Default for Container {
     fn default() -> Self {
-        Self::new(Layout::Horizontal)
+        Self::new(Layout::Vertical)
     }
 }
 
 impl Tree {
     pub fn new(area: Rect) -> Self {
-        let root = Node::container(Layout::Horizontal);
+        let root = Node::container(Layout::Vertical);
 
         let mut nodes = HopSlotMap::with_key();
         let root = nodes.insert(root);
@@ -322,7 +322,7 @@ impl Tree {
                     container.area = area;
 
                     match container.layout {
-                        Layout::Vertical => {
+                        Layout::Horizontal => {
                             let len = container.children.len();
 
                             let height = area.height / len as u16;
@@ -347,7 +347,7 @@ impl Tree {
                                 self.stack.push((*child, area));
                             }
                         }
-                        Layout::Horizontal => {
+                        Layout::Vertical => {
                             let len = container.children.len();
 
                             let width = area.width / len as u16;