Split from the pull request below at the review's request; the code is the runner's footprint
as reviewed there, unchanged.
- `macro.run` first runs the macro in dry-run mode on the real workbook (unless the rule is
`overwrite`) and puts everything back: the workbook, its selection and history through the
dry run's undo group, and the session state a dry run may touch (`Saved`: the active
workbook, open documents, the saved mark, selections, unlocked ranges, trust, clipboard,
preferences, mode, journal and recording, queued requests, format painter, find, ruler,
hidden windows, drawing tool and the comment panes).
- Cells it would write outside its inputs that hold data, and sheets and objects it would
delete, are conflicts: `ask` asks before anything runs, `fail` fails, and `shiftDown` and
`shiftRight` insert cells over the block of every written cell and check again. A shift is
refused when it would move an input, when the macro deletes sheets or objects, or when the
touch log is full.
- A dry run stops before a file step and before Solver; the footprint is then partial, and the
run checks each step as it goes.
- The dry runs and the run share one clock, one time limit and one step budget.
- `macro.check` reports the inputs, the output anchor, approval needed and the footprint.
- Tests: the footprint tests that moved with this code.
The review asked for the runner to be split. This pull request keeps the policy, the input
checks, the step machine and `macro.run`; working out before a run where a macro writes (the
footprint dry run, shifting data to make room, `macro.check`) moves to the pull request above it.
- Unless the conflict rule is `overwrite`, every run now checks each step as it runs, which the
run did before only after a partial footprint: a step that writes over cells outside the inputs
that held data when the run started, or deletes sheets or objects that were there, stops the
run, which asks (`ask`) or fails, and the run rolls back.
- `shiftDown` and `shiftRight` need the footprint, so here they stop the run as `fail` does.
- Moved: `Footprint`, `Saved`, `footprint`, `diff`, `make_room`, `macro.check`, the dry-run
branches of the machine, `policy::previewable`, `DocState::touched` and the touch log,
`Session::journal_dropped` and `truncate_journal`, and the tests of those.
- Test: `each_step_is_checked_for_writes_over_data` (the review's counterexample: a permitted
file step or Solver, then a write over B1, under `fail` and `ask`).
A macro whose format version is above this build's was dropped on open,
so the next save removed it from the file, and the warning said only
that it couldn't be opened. It is now kept as the file held it
(Workbook::macros_unread, shared between snapshots), never read, listed
or run, and written back unchanged by JSON and xlsx saves, numbered
after the readable macros and around visible names of the storage
shape. Kept macros count toward the 1,000-macro limit after the
readable ones; one too large for an xlsx item is left out. The warning
says it is kept and saved back; damaged and over-limit macros keep
their own warning.
check_limits capped the name, description, notes, step count, depth and
input names, and left the shortcut, permissions, output anchor, default
range, column types, command ids, Repeat ranges, If cells and values and
Stop messages bounded only by the item size; the input declaration was
stored unchecked (rows [5, 2], a cell input with cols [2, 5]).
Now each of them has a limit (docs/macros.md lists them), one-line
fields refuse control characters, and a command id is letters, digits,
. and _ (every registered id passes, tested). An If value may be null
(Empty and NotEmpty ignore it); Repeat.max stays the runner's to bound.
An input's least rows and columns can't pass its most, a cell input is
one row and one column with no header and at most one column type, and
no input lists more column types than columns. check_limits takes every
struct apart field by field, so a new field doesn't compile there until
its limit is decided. A macro from a file that breaks a rule is left
out with the usual warning, never changed to fit.
with_names numbered macros 0..N, and stash::set_many refuses to write a
hidden name beside a visible one of the same name, so a visible
_gc_macro_0_0 (from a file, or defined after the file opened, when the
stored names are no longer in the workbook) made every xlsx save of a
workbook with macros fail. The index is GridCraft's choice: macros now
take the free indices from 0 up, skipping every key a visible
workbook-scope name of the storage shape uses (compared as the stash
reads names), in their order. No arithmetic depends on a number from
the file.
Six fixes from a review of the resolver, each with a regression test that
fails without it:
- A bare Row or Column under a general reference key (to, from, at, area,
source, target, destination, location) stays text: Change Spelling's
replacement word and a pivot field's area were being rewritten into the
current row's A1 range. Row.col(2), {{Row}} and {"$ref": "Row"} still
resolve there, and the bare word still resolves under cell and range keys.
- {{{{ in a string is a literal {{, so text that needs the braces can be
written; an unknown token is still an error.
- Input.data on a range that is only a header row, and Name: of a table
with no data rows, are refused instead of reading the header.
- below(0), below(-3) and right(0) are refused like resize(0, 1) is, instead
of becoming 1.
- A defined name on a sheet whose name holds a dollar sign resolves: the
dollar anchors are stripped from the reference part only.
- quote_sheet is the engine's one rule (gridcraft_core::quote_sheet), which
quotes a sheet named like a cell reference, an R1C1 token or a boolean and
leaves a period unquoted.
docs/macros.md says which keys take a bare token and how to write a literal
brace.
A macro could declare an input called Q1, AB12 or Sum1, and a step written
with plain A1 text, as a recorded one is, would then resolve to the input's
range instead of the cell. check_limits refuses such names; the docs say so.
Regression test.
The inputs paragraph described how a run binds inputs and the message it
shows, which the runner adds in a later pull request. It now says what the
declaration is for and that this version stores and checks it.
The intro said a macro run rolls everything back on an error, but a step that exports or prints to a path writes the file before a later step can fail, and the Running section says that file stays. The intro now limits the guarantee to workbook changes.
The policy summary said file commands never run in a macro, but File >
Properties runs, and exports and printing run: without a path they only
produce bytes, and with one they need the permission and approval. The
summary now names what is denied and what runs, and the paragraph is
wrapped to the file's line length.
`Name:` read a name only up to the first period, so `Name:Sales.Q1` looked up `Sales` and
treated `Q1` as a method, and a workbook name called Sales.Q1 could not be used in a macro,
alone or as `Name:Sales.Q1.cell(1,1)`.
The name now runs through periods, and the longest defined name or table that exists and ends
at a period (or the end) is used; what follows is read as methods. So `Name:Data.row` is a
name called Data.row, and `Name:Sales.offset(1,0)` still moves Sales. When no name matches,
the error names the text before the first method, and a bad method after a dotted name is
still refused. Tests cover direct resolution, reference parameters, `$ref` and `{{...}}`,
with and without a chained method.
col("...") always matched against the first row of the range, whatever
its header flag. On an input declared without a header row,
Input.col("Amount") silently picked the first column whose first data
cell read "Amount". After .data, the natural Input.data.col("Amount")
failed, because the first row was then a data row. The header row is
now carried through data, and col("...") is refused with a message when
there is none (an input without a header, a Name: base, or after any
other method).
Opening a workbook accepted a macro whose format version `v` was above MACRO_VERSION. Serde
dropped the fields this build doesn't know, and the next save wrote the reduced macro back
with `v: 2`, so a newer build would read it as a complete version 2 macro.
A version above MACRO_VERSION is now refused by Macro::check_limits, and parse_macro checks
the raw `v` before reading the steps. Such a macro takes the existing per-macro path: it is
left out with the usual single warning (which now names a newer format), and the rest of the
workbook opens. Tests cover JSON and xlsx hidden names, with current and missing versions as
controls.
The policy denies window.* commands, but the View tab's window commands
are view.*: a macro could run view.newWindow, which adds a window that
the run's rollback doesn't remove, or view.hideWindow and
view.unhideWindow, which change the session's hidden windows.
The policy now denies those three. Arrange All changes nothing in the
engine and Switch Windows only lists windows, so both stay allowed.
is_token looked only at the leading identifier, so on a workbook with a
sheet called Output (or Row, Column, or the name of a declared input),
"Output!A1:B2" was read as the Output token, and the step failed with
"the macro has no output anchor" or "unexpected '!A1:B2'". This hit
reference keys, $ref and {{...}} alike, including references the
recorder writes for other sheets. A base followed by '!' is now a sheet
name, and the text resolves as a plain reference.
footprint always ran its dry run with the default 60 second limit, so
macro.run with timeLimit 5 could run for over two minutes (a dry run,
then another after a shift) and fail with "ran longer than 60 seconds".
footprint now takes the run's clock and limit. make_way starts the
run's clock before the dry runs, so the checks and the run share one
limit, and macro.check takes timeLimit too.
The footprint dry run stops at an approved file step and at Solver, but
make_way took a partial footprint with no conflicts as proof that the
run was safe, also after a shift. A macro that exported a CSV and then
set B1 ran under onConflict fail or ask and overwrote B1 without asking.
When the footprint is partial and the rule is not overwrite, the run's
machine now checks every step as it runs: a step that writes over
cells, sheets or objects that held data when the run started stops the
run and rolls it back, with a confirmation under ask and an error
otherwise. make_way now returns the machine for the run along with
whether it shifted.
prxnvt