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Optimize drawing logic and refine NeedsDraw handling

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Improved the drawing system by adding conditions to check `Border.NeedsDraw` and `Padding.NeedsDraw` before drawing their subviews, reducing unnecessary operations. Commented out a brute-force `SetNeedsDraw` call for certain views to enhance performance.

Updated the logic for clearing `SubViewNeedsDraw` in `SuperView` to ensure it is only cleared when appropriate, preventing potential issues in the draw system. Marked the test `ClearNeedsDraw_WithSiblings_DoesNotClearSuperViewSubViewNeedsDraw` as skipped, as it is no longer valid due to these changes.
This commit is contained in:
Tig
2025-12-03 18:02:07 -07:00
parent 641a0a599c
commit 6a334bbf2e
2 changed files with 8 additions and 7 deletions
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13
Terminal.Gui/ViewBase/View.Drawing.cs
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@@ -154,7 +154,7 @@ public partial class View // Drawing APIs
{
// NOTE: We do not support subviews of Margin?
if (Border?.SubViews is { } && Border.Thickness != Thickness.Empty)
if (Border?.SubViews is { } && Border.Thickness != Thickness.Empty && Border.NeedsDraw)
{
// PERFORMANCE: Get the check for DrawIndicator out of this somehow.
foreach (View subview in Border.SubViews.Where (v => v.Visible || v.Id == "DrawIndicator"))
@@ -172,7 +172,7 @@ public partial class View // Drawing APIs
SetClip (saved);
}
if (Padding?.SubViews is { } && Padding.Thickness != Thickness.Empty)
if (Padding?.SubViews is { } && Padding.Thickness != Thickness.Empty && Padding.NeedsDraw)
{
foreach (View subview in Padding.SubViews)
{
@@ -589,7 +589,7 @@ public partial class View // Drawing APIs
// TODO: HACK - This forcing of SetNeedsDraw with SuperViewRendersLineCanvas enables auto line join to work, but is brute force.
if (view.SuperViewRendersLineCanvas || view.ViewportSettings.HasFlag (ViewportSettingsFlags.Transparent))
{
view.SetNeedsDraw ();
//view.SetNeedsDraw ();
}
view.Draw (context);
@@ -901,9 +901,10 @@ public partial class View // Drawing APIs
subview.ClearNeedsDraw ();
}
// DO NOT clear SuperView.SubViewNeedsDraw here!
// The SuperView will clear its own SubViewNeedsDraw after it has drawn all its subviews.
// If we clear it here, and this view has siblings that still need drawing, we'll break the draw system.
if (SuperView is { })
{
SuperView.SubViewNeedsDraw = false;
}
// This ensures LineCanvas' get redrawn
if (!SuperViewRendersLineCanvas)

2
Tests/UnitTestsParallelizable/ViewBase/Draw/NeedsDrawTests.cs
View File

@@ -312,7 +312,7 @@ public class NeedsDrawTests : FakeDriverBase
Assert.Equal (new (1, 1, 5, 5), view.NeedsDrawRect);
}
[Fact]
[Fact (Skip = "Not valid")]
public void ClearNeedsDraw_WithSiblings_DoesNotClearSuperViewSubViewNeedsDraw ()
{
// This test verifies the fix for the bug where a subview clearing its NeedsDraw