Owner report: "I dont see the < after I minimize the window" — after
collapsing the plugin shelf with the > toggle, the < (expand) glyph was not
visible.
Root cause, established with a real-DAT draw probe (font 0x40000000) before
changing anything: '<' and '>' share IDENTICAL glyph metrics (OffsetY=4,
Width=5, Height=7, VerticalOffsetBefore=5), so there is no per-glyph
asymmetry to explain "I see one but not the other." Against the pre-fix 12px
grip band, the toggle's FILL glyph plane measured fully INSIDE the band in
both states (local y=[3,10] of [0,12]) — the "16px line box overhangs a 12px
band" theory alone does not erase the glyph, so a bare clip fix would not
have addressed the report. What IS true: the border-inflated OUTLINE
(background/shadow) plane, drawn first per retail's UIElement_Text::DrawSelf,
spans y=[-1,14] before clipping and was cropped by the band's self-clip
(UiElement.ClipsChildren) to exactly [0,12] — a real but minor defect. The
actual explanation for the report is discoverability: the collapsed shelf
shrank to a bare 24x12 near-black sliver at the screen edge, several times
smaller than any other clickable affordance in the UI — easy to overlook even
though its pixels were, in fact, being drawn.
Fix (src/AcDream.App/UI/PluginSidePanel.cs):
- ExpandedGripBandHeight (new internal property) derives the EXPANDED
grip/toggle band from the real font metrics — max(12, font.LineHeight + 2)
— so neither the fill nor the border-inflated outline plane can clip for
any font; the 12px constant remains only as the bitmap-font fallback.
Threaded through the ctor's initial Height, OnTick's row-wrap height calc,
LayoutChrome, and Reflow's entry-Top/expanded-Height math.
- The COLLAPSED tab is now ButtonExtent (28px) tall instead of the 12px grip
band — the same size as an ordinary entry button — with the toggle glyph
filling and centering in the taller band. This is the actual fix for the
report: the collapsed affordance is now button-sized and findable, not a
bug-for-bug-identical-but-larger clip fix.
Tests:
- tests/AcDream.App.Tests/UI/PluginSidePanelToggleGlyphClipTests.cs (new,
Lane=InstalledDat): loads the real DAT font, builds a live shelf, and
proves via TextRenderer.DebugSpriteSegmentVerts that the toggle's ink (fill
+ outline) is fully contained in its own clip band in BOTH the expanded
('>') and real-click-collapsed ('<') states, plus that the collapsed tab is
button-sized. Verified failing against the pre-fix code (git stash of just
this file) with concrete numbers: computed unclipped span [-1,14] does not
fit inside the 12px band; collapsed height measured 12 (not button-sized).
Passes after the fix.
- tests/AcDream.App.Tests/UI/PluginSidePanelTests.cs: added
CollapseThenExpand_WhileStillDocked_ReturnsToTheIdenticalLeftAndTop (the
dock/anchor invariant survives the collapsed-height change), and derived
Drag_StartingOnShelfPadding_DoesNotMoveTheShelf's press-below-the-grip-band
Y coordinate from the new ExpandedGripBandHeight accessor instead of a
re-hard-coded literal.
Verification: dotnet build (App + tests) green. Filtered run
(PluginSidePanel|UiDatFont|Markup|UiRootInput) 131/131 passed, 0 skipped —
the InstalledDat lane tests actually ran (DAT dir resolved). Full
AcDream.App.Tests suite: 7334 passed / 97 skipped / 36 failed (baseline was
7331/97/36) — the 3 new tests are the only delta; the 36 failed test names
are byte-identical to the pre-existing set (cathedral collision installed-dat
gates, alpha-flush conformance, layout live-mount probes, Linux frame-pacing,
credential resolver — all unrelated to this change).
No retail-divergence register change needed: IA-27 already covers the
plugin shelf's non-retail collapse-toggle glyphs/behavior in general; this
is a bug fix within that already-declared deviation, not a new one.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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