1 files changed, 50 insertions, 0 deletions
diff --git a/views.go b/views.go
new file mode 100644
index 0000000..0e3d95e
--- /dev/null
+++ b/views.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/aarzilli/nucular"
+)
+
+type ViewFunc func(ctx *ntcontext, w *nucular.Window)
+
+type ViewStack struct {
+	stack [100]ViewFunc
+	sp    int8
+	mu    sync.Mutex
+}
+
+func NewViewStack() *ViewStack {
+	return &ViewStack{sp: -1}
+}
+
+func (v *ViewStack) Push(f ViewFunc) {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+
+	v.stack[v.sp+1] = f
+	v.sp++
+}
+
+func (v *ViewStack) Pop() (ViewFunc, error) {
+	v.mu.Lock()
+
+	if v.sp <= 0 {
+		return nil, fmt.Errorf("Cannot pop root element from ViewStack")
+	}
+
+	defer (func() {
+		v.stack[v.sp] = nil
+		v.sp--
+		v.mu.Unlock()
+	})()
+
+	return v.stack[v.sp], nil
+}
+
+func (v *ViewStack) Peek() ViewFunc {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+	return v.stack[v.sp]
+}