edit.autoFill capped source and target at 5M cells separately, but fill()
writes one cell per source lane per step, and it never checked the target
held the source. Whole rows into whole columns (`2:3` into `A:A`) filled
every one of 16,384 columns down a million rows: ~17 billion writes, then
a 24-51 GB allocation abort that catch_unwind can't stop.
Excel (observed via COM on a synthetic workbook) refuses AutoFill when the
target doesn't contain the source or holds it away from every corner, and
accepts any corner-sharing target. edit.autoFill now applies that rule
(fill::holds_source_in_corner), and fill() bounds lanes x steps by
MAX_FILL_CELLS as a backstop. The 5M literals in auto_fill and fill_dir
use the shared constant.
Regression test: fill::tests::autofill_refuses_targets_that_do_not_extend_the_source.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Flash Fill read stored values, so a date was the serial number 45306,
not 2024-01-15: with "15/01/2024" given for 2024-01-15 it found no
part of the source in the example and filled every row with
"15/01/2024" again. It now reads the cells' displayed text, as Excel
does.
A growth series with a step below 1 stopped at once when given a stop
value, since the stop was only checked for rising series. It now bounds
the series in the direction it runs.
Following Excel's AutoFill series:
- a single time steps by an hour (9:00, 10:00, 11:00); it was copied.
- Qtr3 and Quarter3 wrap after 4 like Q3; they counted on to Qtr5.
- 1st Period continues as 2nd Period, 3rd Period; it gave 2st, 3st.
- a source without a common pattern (Product 1, On backorder) continues
each cell's own series; it was copied as is.
A plain drag copies a lone number and extends every other series; Ctrl+drag
(Cmd on macOS) now does the opposite, as in Excel: a lone number counts up
by 1, and numbers, dates, lists and `Item 1`-style text are copied.
edit.autoFill gains mode "alternate" for this.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Fill Series by month used the previous cell's day as an overflowing DATE()
day, so Jan 31 + 1 month became Mar 3 and February was skipped. The same
overflow affected year steps from Feb 29 and the autofill month pattern.
Each item is now computed from the start date plus n months and the day is
clamped to the target month's length (Jan 31, Feb 28, Mar 31, Apr 30), so
the clamp does not compound. Leap years are handled.
Fixes#132
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- ui-egui: title bar with QAT, full ribbon (Home/Insert/Draw/Page Layout/Formulas/Data/
Review/View/Automate + Table/Chart Design), formula bar with Name Box, virtualised grid
(frozen panes, overflow, borders, CF data bars/scales/icons, tables, sparklines, filter
buttons, charts/pictures/shapes), in-cell editor with point mode, reference colouring,
autocomplete and argument hints, sheet tabs, status bar, dialogs, control channel
- apps/sheetcraft: desktop app (control server, file dialogs, prefs, drag & drop)
- chart: toolkit-free chart layout/rendering for 25 chart kinds + sparklines + rasteriser
- mcp + sheetcraft-cli: MCP server (headless or bridged) and CLI (info/convert/eval/cat/run/mcp)
- xtask (ci/layers/assets/wasm/version/parity), release workflows, packaging, placeholder icon
- automatic row heights
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
aiongg