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fix #390: retail display-change UI cascade — clamp + per-res reload

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Decomp-first per the block's rule: the research doc
(docs/research/2026-08-13-retail-ui-display-change.md, committed here)
pulled retail's actual mechanism before any code. A display change runs
UIElementManager::RefreshEvent @0x0045C530 ->
UIElement::UpdateForParentSizeChange @0x00462640, which unconditionally
re-applies every floating window's own clamping MoveTo override
(x = max(0, min(x, parentW - selfW)) - top-left priority, oversized
windows pin to 0), then broadcasts global message 0xE whose sole
listener reloads the per-resolution auto layout. No proportional moves,
no resets; retail saves layouts only via @saveui.

Port: RetailWindowLayoutPersistence.ClampAllToScreen() is the cascade
clamp (no store I/O; _restoring suppresses the per-move save so a live
drag-resize cannot write settings.json per frame), and
RetailUiRuntime.Draw carries a two-step screen-size edge detector:
change frame -> clamp; first stable frame -> one
RestoreAll(saveBack:false) per-resolution reload (the 0xE analog; no
lazy save-back, matching retail's save-only-on-command). The login
restore path already used retail's exact clamp math (Apply) - the live
trigger was the missing half, which is precisely the stranding the user
reported.

Deliberate deviation, register AD-91: retail's gmFloatyChatUI windows
have NO clamp and can strand; the block's requirement ("UI windows must
stay reachable") clamps every registered window uniformly.

Tests: 5 new persistence facts (clamp/top-left-pin/no-move/no-save-on-
clamp/no-save-on-live-reload). App suite 4,967/3 skips. Gate script
section D3 filled in.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-08-13 17:42:50 +02:00
parent 8463d64311
commit 2153bee247
7 changed files with 620 additions and 10 deletions
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36
src/AcDream.App/UI/RetailUiRuntime.cs
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@ -616,7 +616,41 @@ public sealed class RetailUiRuntime : IDisposable
_automation?.Tick(deltaSeconds);
}
public void Draw(System.Numerics.Vector2 screenSize) => Host.Draw(screenSize);
private System.Numerics.Vector2 _lastScreenSize;
private bool _screenSizeSettling;
public void Draw(System.Numerics.Vector2 screenSize)
{
// #390: retail's display-change UI cascade, ported as a two-step edge
// detector on the per-frame screen size:
// - the frame a change is seen: re-clamp every floating window into
// the new bounds (retail's unconditional clamping MoveTo cascade,
// UIElementManager::RefreshEvent @0x0045C530) — cheap, no I/O,
// keeps windows reachable through a live drag-resize;
// - the first frame the size REPEATS after a change: one reload of
// the per-resolution saved layout (retail's post-change global
// message 0xE → per-resolution auto-layout reload), without the
// login path's lazy save-back (retail saves only via @saveui).
// The first-ever frame seeds the size silently — the login restore
// owns initial placement.
if (_lastScreenSize == default)
{
_lastScreenSize = screenSize;
}
else if (screenSize != _lastScreenSize)
{
_persistence?.ClampAllToScreen();
_lastScreenSize = screenSize;
_screenSizeSettling = true;
}
else if (_screenSizeSettling)
{
_screenSizeSettling = false;
_persistence?.RestoreAll(saveBack: false);
}
Host.Draw(screenSize);
}
public bool HandleInputAction(AcDream.UI.Abstractions.Input.InputAction action)
{