only open history view if message is not onscreen

1 files changed, 11 insertions, 0 deletions

diff --git a/tui/layout.go b/tui/layout.go
index d230a87..1cd3124 100644
--- a/tui/layout.go
+++ b/tui/layout.go
@@ -23,6 +23,7 @@ type Box struct {
 	computedSize [2]int
 	computedRect rect
 	isOverflow bool
+	isVisible bool
 	mouseEvent MouseEvent
 	contextMenu []string
 }
@@ -97,6 +98,14 @@ func Pop() {
 	}
 }
 
+func IsVisible(id string) bool {
+	b := layout.back[id]
+	if b != nil {
+		return b.isVisible
+	}
+	return false
+}
+
 func (b Box) axes() [2]BoxSize {
 	return [2]BoxSize {b.Width, b.Height}
 }
@@ -372,6 +381,8 @@ func (b *Box) drawComputed(
 		bMax := b.computedRect.max[i] - b.Margins[i * 2 + 1]
 		viewRect.max[i] = min(bMax, parentRect.max[i])
 	}
+	b.isVisible = viewRect.max[0] - viewRect.min[0] > 0 &&
+		viewRect.max[1] - viewRect.min[1] > 0
 
 	style := parentStyle
 	if b.Style != nil {