Implement vertical split calculations.

3 files changed, 30 insertions, 3 deletions

diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index 2942507d..6b5b285d 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -15,10 +15,13 @@ pub struct Editor {
 }
 
 impl Editor {
-    pub fn new(area: tui::layout::Rect) -> Self {
+    pub fn new(mut area: tui::layout::Rect) -> Self {
         let theme = Theme::default();
         let language_servers = helix_lsp::Registry::new();
 
+        // HAXX: offset the render area height by 1 to account for prompt/commandline
+        area.height -= 1;
+
         Self {
             tree: Tree::new(area),
             should_close: false,
diff --git a/helix-view/src/tree.rs b/helix-view/src/tree.rs
index a5b59a79..dd07d76d 100644
--- a/helix-view/src/tree.rs
+++ b/helix-view/src/tree.rs
@@ -156,7 +156,31 @@ impl Tree {
                     container.area = area;
 
                     match container.layout {
-                        Layout::Vertical => unimplemented!(),
+                        Layout::Vertical => {
+                            let len = container.children.len();
+
+                            let height = area.height / len as u16;
+
+                            let mut child_y = area.y;
+
+                            for (i, child) in container.children.iter().enumerate() {
+                                let mut area = Rect::new(
+                                    container.area.x,
+                                    child_y,
+                                    container.area.width,
+                                    height,
+                                );
+                                child_y += height;
+
+                                // last child takes the remaining width because we can get uneven
+                                // space from rounding
+                                if i == len - 1 {
+                                    area.height = container.area.y + container.area.height - area.y;
+                                }
+
+                                self.stack.push((*child, area));
+                            }
+                        }
                         Layout::Horizontal => {
                             let len = container.children.len();
 
diff --git a/helix-view/src/view.rs b/helix-view/src/view.rs
index 02eda72f..f1959ee3 100644
--- a/helix-view/src/view.rs
+++ b/helix-view/src/view.rs
@@ -51,7 +51,7 @@ impl View {
     /// Calculates the last visible line on screen
     #[inline]
     pub fn last_line(&self) -> usize {
-        let viewport = Rect::new(6, 0, self.area.width, self.area.height - 2); // - 2 for statusline and prompt
+        let viewport = Rect::new(6, 0, self.area.width, self.area.height - 1); // - 1 for statusline
         std::cmp::min(
             self.first_line + (viewport.height as usize),
             self.doc.text().len_lines() - 1,