A script whose first lines name an engine with `#targetengine name` (or
`//@targetengine name`) runs in that engine, and a later script that names
it sees the globals and functions earlier runs left, until the engine is
dropped or the session ends. A script without the line, and
`#targetengine main`, still get a new engine for each run.
- A session keeps at most 8 named engines, each with a 64 MiB heap. A run
that goes past the heap ends with the heap limit, and the engine stays
usable. Names are 1 to 64 bytes. The line comes once, in the script
itself, before its code and its #include lines.
- An uncaught error, a limit or script.stop puts the documents back and
keeps the globals the run set. An internal error drops the engine. A run
stopped at a dialog or left paused ends where it was before the engine
is kept. An error in a function an earlier run defined is reported
without a line and column.
- `vc`, `$`, `alert`, `confirm` and `prompt` are made once for each engine
and act for the run that calls them, including copies an earlier run kept
in a global. `vc.args` gives a read-only copy of the calling run's
`args`, and what a run sets on `$` lasts for that run only.
- `script.engines` lists the named engines with their heap, and
`script.engine.drop {name}` drops one. Scripts cannot run either.
- The engines stay on the thread that made them. A session used on
another thread starts there with no named engines, and the old ones are
dropped on their own thread.
- The web build has no named engines: a run that names one other than
`main` ends with an error before any of it runs.
- `Realm::end` ends a run where it is, `Realm::error_source` counts from
the realm's last script, and `HostItem::FrozenGetter` gives a frozen
value each time it is read.
- The script checker lists `#targetengine` as a supported directive.
Docs: docs/mcp.md, docs/target-app-parity.md, docs/gaps.md.
A script's $ object now has the other members the Dollar object page
lists: about, appEncoding, bp, build, buildDate, colorPicker,
decimalPoint, engineName, error, flags, gc, getenv, setenv, global,
hiresTimer, level, line, locale, localize, memCache, os, screens, sleep,
stack, strict and version. Scripts also get the global
localize(object, ...values), toSource(value) and
Object.prototype.toSource().
Each run starts with the interface's locale and its own $ state;
$.setenv changes only the run's copy of LANG, LC_MESSAGES, LC_ALL and
OS, and $.getenv returns null for every other name. $.sleep waits from
0 to 1,000 ms between frames, and script.stop ends the wait. toSource
writes plain data only and throws on cycles, getters, host objects and
values past the data limits.
The script checker reports $.localize as a $ member instead of the
global localize function.
FeatureId and OutsideId replace the string ids the analyzer passed around.
One table each gives the id, the need and the report order, so
catalog::FEATURES and catalog::need() are gone. Feature.id and the engine
JSON are unchanged; OUTSIDE is generated from the same table.
Fixes#4013
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
VectorCraft does not run scripts written for the reference app, and
File › Scripts held only the disabled Other Script…. File › Scripts ›
Check Script… picks a .jsx, .jsxinc or .jsxbin file, reads it without
running any of it, and shows a report: what the script needs (the
script language's own objects, the document model, files, menu
commands, dialogs, or features only the reference app has), what it
would do outside the document, the menu-command strings it passes, the
document-model member chains and type names it uses, its directives,
the files it includes, and the problems that would stop it loading.
Copy Report copies the report as JSON. File › Open and drag-and-drop
show the report for those files too.
- vectorcraft-scriptcheck, a new Standalone crate with no
dependencies, holds the checker: a lexer for ECMAScript 3 with E4X
literals and the #name and //@name directive lines, and an analysis
of the tokens that follows variables, function scopes and the files
a script includes. It never recurses: open brackets, the levels of
an XML literal and the function bodies being read are kept on stacks
capped at 4,096. It reads at most 8 MiB of a file and 32 MiB with the
included files, follows 64 included files 16 deep, looks up at most
1,024 paths for them, keeps 1,000 entries in a list, tracks 1,000
variables holding member chains and 1,000 holding File objects, and
cuts echoed text to 120 characters. A compiled script is reported as
compiled and isn't read.
- script.check (engine, a query) takes path, data or dataBase64. With a
path and includes: true, it reads the files the #include lines name
from inside the script's folder, through the automation read root,
and when the script or one of those files assigns a member chain or a
File object to a variable, the check treats the variable as holding
it in every file. It doesn't follow absolute names, names, folders or
links that lead out of the folder, names or folders longer than 4,096
bytes, or JSINCLUDE, and it reads only regular files.
- ui.checkScript shows the report (dialog scriptCheck). File › Open
lists Scripts (.jsx, .jsxinc, .jsxbin) and sends a script's path to
script.check, which reads at most 8 MiB of it.
The language rules come from ECMA-262 3rd edition and ECMA-357 2nd
edition. The directive, platform and document-model root names come
from the public JavaScript Tools Guide and scripting guide pages that
catalog.rs cites by URL, and executeMenuCommand, doScript, loadAction,
unloadAction and selectTool come from the public forum posts cited
there; only names are used. Every script in the tests is written from
scratch with invented names.
Docs: docs/mcp.md, docs/target-app-parity.md.
dotCooCoo