2 files changed, 68 insertions, 0 deletions
diff --git a/runtime/ui/layout/vertical.go b/runtime/ui/layout/vertical.go
new file mode 100644
index 0000000..67d12f4
--- /dev/null
+++ b/runtime/ui/layout/vertical.go
@@ -0,0 +1,58 @@
+package layout
+
+import (
+	"fmt"
+	"github.com/wagoodman/dive/runtime/ui/view"
+)
+
+type Vertical struct {
+	visible bool
+	width int
+	elements []View
+}
+
+// how does overrun work? which view gets precidence? how does max possible height work?
+
+func NewVerticalLayout() *Vertical {
+	return &Vertical{
+		visible: true,
+		width: view.WidthFull,
+		elements: make([]View, 0),
+	}
+}
+
+func (v Vertical) SetWidth(w int) {
+	v.width = w
+}
+
+func (v *Vertical) AddView(sub View) error {
+	for _, element := range v.elements {
+		if element.Name() == sub.Name() {
+			return fmt.Errorf("view already added")
+		}
+	}
+	v.elements = append(v.elements, sub)
+	return nil
+}
+
+func (v *Vertical) Name() string {
+	return view.IdentityNone
+}
+
+func (v *Vertical) IsVisible() bool {
+	return v.visible
+}
+
+func (v *Vertical) Height() (height int) {
+	for _, element := range v.elements {
+		height += element.Height()
+		if height == view.HeightFull {
+			return view.HeightFull
+		}
+	}
+	return
+}
+
+func (v *Vertical) Width() int {
+	return v.width
+}
diff --git a/runtime/ui/layout/view.go b/runtime/ui/layout/view.go
new file mode 100644
index 0000000..62c5ef0
--- /dev/null
+++ b/runtime/ui/layout/view.go
@@ -0,0 +1,10 @@
+package layout
+
+import (
+	"github.com/wagoodman/dive/runtime/ui/view"
+)
+
+type View interface {
+	view.Identifiable
+	view.Dimensional
+}