gramps
9b56e88800
The container tracks the element's own Width/Height again; the crop stays in the bitmap.
47 lines
3.6 KiB
Markdown
47 lines
3.6 KiB
Markdown
# MyMistakes.md
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> One task at a time. Updated before every commit touching that task: current iteration +
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> why the last one failed. On task complete, committed AND pushed → truncate to this stub.
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> A new task does NOT seed this file until its first failure.
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## Task (active — committed `582d1f4`, NOT pushed, awaiting creator verification)
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Stream widget bounding box: hug the widget on all four sides, pinned to canvas (0,0).
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## Iterations that failed
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1. **e917c41 — fixed 1920×1080 viewport + `Stretch="Uniform"` + startup registration.**
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Failed: `Uniform` letterboxed the 16:9 canvas into arbitrary‑sized boxes → asymmetric dead
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padding read as a "gap". Lesson: Fill the box with the cropped frame, never Uniform.
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2. **9d4103c — per‑document CSS reset (`html/body` width/height 100%) + (0,0) anchor.**
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Failed ("enlarged the gap"): forcing dimensions overrode the widget's own layout and expanded
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the dead space. Lesson: inject only `overflow:hidden` + transparent background — never set sizes.
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3. **8d793af — viewport == element‑box size + `Stretch="Fill"`.**
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Failed (janky / truncating / scrollbars): hosting at the box size clips full‑bleed widgets to
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their upper‑left chunk, and tracking the box reflows the page on drag. Lesson: render at a
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fixed canvas size, never track the box.
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4. **f39ebd9 — crop capture to `scrollWidth/scrollHeight` bounds + (0,0) + Fill.**
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Partially passed (panel fixes 1a/1b/4 confirmed) but the box stayed loose; the apparent
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"tight right/bottom" was just the small‑viewport clip edge. **ROOT CAUSE: the crop never ran.**
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The script returned `JSON.stringify(...)` (a string); `ExecuteScriptAsync` JSON‑encodes every
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result, so the JSON was double‑encoded → `JsonDocument.Parse` got a string node →
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`GetProperty` threw → try/catch swallowed → bounds unset → no crop. Lesson: return a real JS
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object, never a stringified one. Also: scroll extents ≠ widget rect (they include page margins).
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5. **70fe2b8 — fixed canvas‑size viewport (1920×1080) + crop + Fill.**
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Image render/resize became solid (creator confirmed) but the box still gapped right/bottom and
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wasn't 0,0. Same silent JSON bug — the crop still never executed — and the measure was scroll
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extents regardless. Lesson: verify declared mechanics actually execute; assume nothing ran.
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## Current iteration (web bounding box — UNCOMMITTED, verification pending)
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ALPHA-BBOX CROP: `FindContentBounds` scans the captured Bgra32 frame and returns the bounding box
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of non-transparent pixels (the background is injected transparent, so alpha = the widget's extent).
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Capture is cropped to that rect and `Stretch="Fill"` maps it flush under the box. No DOM query, no
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layout timing — the crop rect IS the rendered widget by construction, so it can NEVER truncate
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visible content. Worst case (widget fills the canvas) = full frame = the confirmed-good render.
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Canvas-size viewport + Fill untouched. `QueryContentBoundsAsync` + the JS script are DELETED.
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## Iteration that just failed (`a5b9952` — wrapper-excluded DOM-union crop + image alignment)
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Broke the image rendering — creator could not evaluate the box because the image was gone/ruined.
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Why: the visible-element-union rect is measured ONCE on NavigationCompleted; widget layout isn't
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settled then (async fonts/images, load animations, iframes), so the crop rect comes out tiny/wrong
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and the Fill-stretched frame renders a broken/zoomed sliver. This was against the creator's explicit
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"don't break the rendering" instruction. Lesson: measure actual RENDERED PIXELS (alpha), never
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transient DOM state; and never ship a crop blind. |