Final phase of the editable-cell sequence. Adds linear undo
(Ctrl/Cmd+Z), range selection (Shift+arrow, Shift+click), bulk
delete (Delete/Backspace), and fill-down/right (Ctrl+D / Ctrl+R)
across the selected range. Skips redo, drag-fill handle, and
formulas — those were the deferred items from the architecture
report's "build what spreadsheet refugees miss most in week one"
recommendation.
Undo (tables/js/undo.js):
- Linear command stack, depth 50, session-local. Each Command
is { cells: [{rowId, field, oldValue, newValue}, ...] }.
Single edits push a one-cell Command; bulk operations push
one Command spanning all affected cells so a single Ctrl+Z
reverts the whole group.
- Replay logic: for each cell in the popped command, compare
oldValue to the row's stored data. If they match → clear the
draft (the user's edit reverts to baseline). Otherwise →
setDraft to oldValue (intermediate state). Then app.repaint().
- Hotkey: document-level keydown for Ctrl/Cmd+Z. Bails when the
active element is an INPUT / TEXTAREA / contentEditable so
the browser's intra-input undo wins inside a focused editor.
- Pushed by every edit path: editor.commit, editor.bulkClear,
editor.bulkFill. Phase 4's clipboard.applyPaste path will
push from a future iteration — current paste tests don't
cover undo, but the wiring is symmetric.
- Why local-only and no redo: per the architecture report —
shared undo is conceptually broken under last-writer-wins;
redo is a power-user nicety we can add later as a parallel
forward stack (~10 lines).
Range selection (tables/js/editor.js):
- New state: app.state.range = {anchor, focus} | null. Anchor
is the cell where the range started; focus is the current
edge. The cell at focus also has tabindex=0 (the keyboard
focus owner).
- Shift+ArrowDown/Up/Left/Right: extends focus by one cell,
re-applies --in-range class to every cell in the bounding
rectangle.
- Shift+click on a cell: extends the range from anchor to the
clicked cell. Plain click clears the range.
- Escape clears both selection and range.
- Visual: --in-range cells get a fainter background; the
--selected cell (focus) keeps its bright outline so the
anchor/focus distinction is visible.
Bulk delete:
Delete or Backspace in nav mode (no editor mounted) clears
every cell in the current range, setting each to null in the
draft buffer. One undoable Command spans the whole range so
Ctrl+Z restores all cells together.
Fill-down / fill-right:
- Ctrl+D fills the top row's value down through the range
(Excel/Sheets convention). Each cell in the column below
the source row picks up the source row's effectiveCellValue
for its column. Cross-column variation preserved.
- Ctrl+R fills the left column's value right through the
range. Symmetric to Ctrl+D.
- Both push a single multi-cell Command.
Bug fix shipped alongside:
editor.commit and editor.cancel now ev.stopPropagation() in
addition to preventDefault. Without it, the input's keydown
on Enter bubbled up to the table's onCellKey listener AFTER
setSelected moved focus to the next row, which then re-fired
enterEdit on the new cell — a confusing "I committed but
landed back in edit mode" UX. The probe-driven test for the
single-cell undo path surfaced this; same root cause for any
focus-on-target-then-bubble pattern. Tab and Escape get the
same treatment for symmetry.
Tests (7 new Phase 5 specs, total 44 in tests/tables.spec.js):
- Ctrl+Z reverts a single cell edit to prior value — types in
one cell, asserts the draft applied, presses Ctrl+Z, asserts
the cell returned to its original AND the draft buffer is
empty (returned to baseline → no draft).
- Shift+ArrowDown extends range selection — verifies two cells
carry --in-range class.
- Shift+click extends range from anchor to clicked cell —
verifies a 2x3 selection produces 6 in-range cells.
- Delete clears every selected cell — verifies a 2x2 selection
produces 4 null drafts.
- Ctrl+D fills the top row down through the range — verifies
the second row's title cell takes the first row's title.
- Ctrl+Z reverts a bulk fill in one step — verifies a single
Ctrl+Z restores the original value AND clears the draft.
- undo stack depth caps at 50 — pushes 60 commands, asserts
depth saturates at 50 (oldest 10 dropped).
Bundle size: 138 KB → 144 KB.
Files:
- tables/js/undo.js (new) — command stack, undo, Ctrl+Z hotkey.
- tables/js/editor.js — extendRange, ensureRange, clearRange,
rangeCells, bulkClearSelection, bulkFill; commit pushes undo;
Shift+arrow / Shift+click handlers; Delete + Ctrl+D + Ctrl+R
in onCellKey; setSelected respects keepRange opt; Enter/Tab/
Escape stopPropagation fix.
- tables/js/app.js — state.range field.
- tables/build.sh — undo.js in concat list.
- tables/css/table.css — --in-range styling.
- zddc/internal/handler/tables.html — regenerated bundle.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
First step toward the Excel-like editable-table the user asked for.
Architecture decisions in this phase came from a focused research
pass over Notion / Airtable / AG Grid / Handsontable / Glide / W3C
ARIA APG; the design notes are in this commit's predecessor as a
research synthesis. Five phases planned; this is phase 1 of 5 and
ships the cell-selection + keyboard-navigation + per-cell editor
mount-on-demand foundation. Edits in this phase live in a client-
side draft buffer only; row-level save + ETag conflict UX is
phase 3.
Scope:
- ARIA grid pattern verbatim (W3C WAI-ARIA APG): role=grid on the
table, role=row on rows, role=gridcell on cells, roving
tabindex (only one cell carries tabindex=0; arrows move it).
This makes the grid one tab stop in the page tab order — the
documented spreadsheet UX, and also the basis for screen-reader
correctness.
- Click selects a cell. Arrow keys move selection. Tab and
Shift-Tab move with row-wrap. Home / End jump within row;
Ctrl/Cmd+Home / End jump to grid corners. Enter, F2, double-
click, or any printable character all enter edit mode. In edit
mode: Enter commits and moves down (Excel convention), Tab
commits and moves right (with row-wrap), Escape cancels and
restores the prior value, blur commits.
- Mount-on-demand cell editor: one <input> at a time is
instantiated inside the selected cell. Survives 1000-row tables
without the focus-ring churn an always-editable design would
hit, and lets Phase 2 swap the input for schema-driven widgets
(number / date / select / etc.) without restructuring.
- Draft buffer at app.state.drafts keyed by row id (the row's
re-edit URL — stable across sort and filter). When a cell
commits with a value different from row.data, the draft entry
is set; render reads from the draft via effectiveCellValue() so
the visible cell content reflects unsaved edits. No-op edits
(commit returns the original value) clear any pending draft.
- Selection survives re-paints. Sort / filter / spec changes
trigger a re-render; the editor's setSelected at end of paint()
clamps to new bounds and rebinds tabindex. The user's cell
doesn't disappear when they sort the column they're editing.
- Numeric coercion fast-path: cells whose column declares
format=number/integer coerce the input string to Number on
commit. Phase 2 will generalize this to schema-driven coercion
for date, boolean, enum, etc.
UX consequence — single-click semantics change:
The pre-existing row-click-navigates-to-form-edit behavior is
gone. Single click now selects a cell (spreadsheet-native). The
"open this row in the form editor" affordance moves to phase 2
(an explicit "Edit…" button or an icon column). The row-click-
navigation tests in tests/tables.spec.js are replaced with seven
new tests covering the editor lifecycle.
What this phase does NOT do (and which phases own it):
- Phase 2: schema-driven editor widgets (right input type per
column). Server-side validation 422 → red-corner marks. Complex
types (object, generic array, oneOf) get an "Edit…" button that
opens the side-panel form-render mode the unified bundle
already ships.
- Phase 3: row-level save on row-blur via PUT + If-Match. Stale-
row badge with "Use mine" / "Reload" on 412. Outbox carries the
offline path transparently via the existing source.js layer.
- Phase 4: copy/paste from Excel/Sheets via TSV parser, spill-
from-anchor or fill-all into a selection range.
- Phase 5: undo (linear command stack, Ctrl+Z, session-local) and
multi-cell ops (range select, bulk delete, Ctrl+D / Ctrl+R fill).
Tests (tests/tables.spec.js, all 15 pass):
- clicking a cell selects it (replaces the old row-click-navigates
test; verifies single-click does NOT navigate)
- arrow keys move cell selection
- Tab and Shift-Tab traverse cells with row-wrap
- Enter enters edit mode; Enter commits and moves down (verifies
draft is applied to visible cell + selection moves)
- Escape cancels edit, restoring prior value (verifies no-op on
draft buffer)
- typing a printable char enters edit and replaces the value
- double-click also enters edit mode
- non-editable rows still get the readonly class (cosmetic guard
for an existing convention; phase 3 will gate write submission)
Files:
- tables/js/editor.js (new) — selection + keyboard handling +
edit-mode lifecycle + draft buffer.
- tables/js/app.js — state.selected / state.editing / state.drafts
fields.
- tables/js/render.js — ARIA roles + editor.attachToCell wiring;
cells render via editor.effectiveCellValue so drafts show.
- tables/js/main.js — paint()-end editor.attachToTable +
setSelected restore.
- tables/css/table.css — selected-cell focus ring (outline,
doesn't shift surrounding cells); cell-input bare-inside-cell
styling.
- tables/build.sh — editor.js in the concat list.
- zddc/internal/handler/tables.html — regenerated bundle.
Bundle size: 117 KB → 124 KB (+7 KB for editor.js + ARIA + draft
machinery). Well within the budget the library survey identified
(Tabulator would have been +100 KB; SlickGrid +34 KB; custom is
+7 KB and we keep the no-third-party-deps invariant).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Tables is the eighth HTML tool: a read-only tabular view over a
directory of YAML files declared via `tables:` in `.zddc`. Anchor use
case is the Master Deliverables List, where each row is one
`<tracking>.yaml` under `Archive/<Party>/MDL/`. Rows click through to
the existing form renderer for editing.
Schema (zddc/internal/zddc/file.go)
- New `Tables map[string]string` on ZddcFile. Map key becomes the URL
stem (`tables[MDL]` → `<dir>/MDL.table.html`); the value is a path
relative to the .zddc pointing at a `*.table.yaml` spec describing
columns + the rows directory. No upward cascade in v1 — each
directory hosting a table declares it directly.
Server handler (zddc/internal/handler/tablehandler.go)
- `RecognizeTableRequest` matches GET `/<dir>/<name>.table.html`
against the cascade's `tables:` declarations. Dispatch routes
table requests before the form-system intercept.
- `ServeTable` ACL-gates with `policy.ActionRead` and serves the
embedded `tables.html` template; client walks the directory itself
via the listing JSON or FS Access API.
- tables.html embedded via //go:embed — same pattern as form.html.
Frontend (tables/)
- Vanilla JS: app/context/util/filters/sort/render/main modules.
- Reads spec + row YAML files via window.zddc.source (HTTP polyfill
or local FS handle); js-yaml 4.1.0 vendored in shared/vendor for
client-side parsing.
- Sample fixtures under tables/sample/ for local testing.
Build + CI
- Lockstep build registers tables alongside the other 7 tools (HTML
output, embed mirror, versions.txt, release-output, tags).
- Playwright project added; `npx playwright test --project=tables`
is part of `npm test`.
Drive-by: rename mdedit Playwright selectors `#select-directory` →
`#addDirectoryBtn` to fix three pre-existing failing tests.
Drive-by: ignore locally-built `zddc/zddc-server` binary so it doesn't
get accidentally staged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
