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Two functions (sameCell, columnAt) on Layer.TagHit, 32 lines with their imports, used by edit.zig, mouse.zig and look.zig: they sit with the type now, called Layer.sameCell and Layer.columnAt. docs/design.typ names Layer.zig in its place. No behaviour changes.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The showcase GUI died in joinNotice on a long shader-error notice: with
the tagline narrower than the body, the band hides more columns (skip) than
a long message has padding (pad), and `skip..@min(pad, ..)` ran backwards.
An audit of draw.zig, Layer.zig, Presentation.zig and animation.zig found
the same class elsewhere, all fixed:
- a multi-row pane tag or header scrolled for its caret's line sliced a
shorter row past its end (paintPaneTag, renderHeaderLayer);
- a zero-width column tag kept an earlier frame's viewport, and a column
move's clip took it below zero (now saturating, and the early return
resets the viewport and caret);
- a tag line past 65535 columns overflowed tag_scroll's u16;
- a hover left over from a bigger window dashed past the grid;
- a border drag over a column that went away, a move preview past a
shrunken grid, a column-move rail at zero columns;
- Layer.pointAt cast a host's unchecked float metrics (web) to u16;
- Text.insertVerticalCursor read past its lines for a cursor whose text
changed under it.
Regressions: a test of a notice wider than its band through Msg and
through setMessage (the Post.zig compile-error path), which panics without
the fix; and a monkey over the core at a gui's metrics (random resizes to
a cell, long notices, prompts, multi-row tags, clicks, keys), 400 steps in
the suite, PARDES_FUZZ_SEED/STEPS for longer runs; 60 seeds x 3000 steps
clean.
Shared files touched: none of the list (draw.zig, Layer.zig, Text.zig).
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of rows; wire v8
src/Layer.zig merges TagLayer and BodyLayer. `rows` (0 = no layer) and a
cursor at {x, y}. A tag of N rows is ONE layer of N grid rows: tagHit answers
the row as `line`, bodyHit keeps its meaning, and the per-line layer bases
(TAG_LINE_LAYER_BASE, HEADER_LINE_LAYER_BASE) are gone, not aliased.
Wire v8, the one bump: tag layers carry rows and cursor y, and the frame
carries the placed region list. v7 and v9 peers are refused in both
directions (server test over both, a new frontend test over both).
web: tag_layer_value 11 = rows, 12 = cursor y; app.mjs lays every row.
macOS: the Zig side compiles against Layer; pardes.h still sees one row
per tag layer (accepted, the macOS shell is ignored for now).
No visual change: snapshot goldens and the 17 GUI goldens byte-identical.
Shared files touched: pardes.zig, Messages.zig, gui.zig, macos.zig,
detached/client.zig, detached/server.zig, detached/wire.zig (plus web.zig,
app.mjs, edit.zig, look.zig). Not touched: mouse.zig, tagline.zig,
colors.zig, tty.zig, dump.zig, exec.zig, host_io.zig, panes.zig.
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