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background_construction_delay, default
50 ms; 0 opts out).dormant,
waiting, unset, failed,
ready) that gates evaluation, rendering and downstream
data, so a block never evaluates against missing inputs or shows a stale
result.generate_code()) now waits until every
block is settled, showing a “board not ready” note instead of a partial
script.server$conditions and
board$conditions(); the block server no longer returns its
raw cond object.notify() helper gains glue and
log arguments for literal (brace-safe) text and skipping
redundant logging.allow_empty_state argument of
new_block() now accepts a structured
list(input = ..., data = ...) form to relax required inputs
and the variadic minimum per input kind.loader argument to serve() (default
local_loader()); this drops the process-global staging
slot, so get_serve_obj() and restore_board()’s
meta argument are gone.page_size, n_rows,
filter_rows) are now saved and restored, not reset to
defaults on reload.blockr.locked option, which refuses every mutation while
set.@block, @blockArg, …), collected by the new
block_registration_roclet(); extension packages register
via the exported register_package_blocks().new_block_args(), new_block_arg()) with
JSON-Schema-subset type descriptors
(arg_string(), arg_enum(), …), read via
block_metadata(); registry_metadata() is
deprecated.board_blocks(),
board_links(), board_stacks()) are now pure
reads, removing quadratic re-validation that dominated large-board
startup.external_ctrl_vars() and predicate
has_external_ctrl() expose a component’s externally
controllable variables.trim_rv() fully removes entries from a
reactiveValues object (assigning NULL leaves
the key behind); unlinking a variadic argument now drops it
outright.str_value() compact printer, with matching
utils::str() methods, now covers all remaining domain
classes and containers.blockr_deser.list() method now forwards
... to per-class deserializers, letting callers thread
context to nested deserializers.mod slots in update(...) payloads for
blocks, links and stacks now uniformly expect a
delta shape: a named list keyed by entry ID, where each
entry is a named list of argument values to apply on top of the live
entry.
blocks, keys must be in
block_external_ctrl_vars(blk) — non-ctrl-able changes go
through rm + add. Ctrl-arg writes hit the
corresponding reactiveVal in place; block_name
(always treated as ctrl-able) updates the block’s registry
attribute.links and stacks, deltas are merged
onto the current entry via the new update_link() /
update_stack() S3 generics. The default methods reconstruct
the entry through its stored constructor, preserving sub-class
attributes. Sub-class owners (e.g. dock_stack adding
color) only need to register a method when their
constructor deviates from the convention (#175).block_external_ctrl_vars() always includes
"block_name" — every block can be renamed through
update(...) regardless of its external_ctrl
opt-in. The default ctrl plugin panel renders a block_name
field on every block card alongside any opted-in ctrl vars.
block_supports_external_ctrl() (which would now be
TRUE for every block) has been removed; the gates that used
to call it have been simplified accordingly.block_server.block now constructs a
block_name reactiveVal per block and appends
it to the vars list passed to the ctrl plugin. Two guarded
observers keep that reactiveVal in sync with the block’s
block_name attribute on the board (one emits an
update(mod = ...) when the ctrl plugin writes the rv; the
other pulls registry-attr changes back into the rv). The
ctrl_block_server plugin signature is unchanged — block
authors and custom ctrl plugins see uniform vars
reactiveVals.attach_default_packages can be set to
opt into evaluating block expressions with objects from default packages
directly available.ctrl_block() plugin for external block control,
allowing blocks to be driven programmatically from outside the standard
block UI.clear_board() for removing all blocks/stacks from a
board.bbquote() and helpers (.,
..) for cleaner code generation via
bquote()-based quasiquotation.custom_plugins() and
custom_options() for easier board customization.block_metadata() for retrieving per-block metadata
and attach block metadata with defaults to block objects.blockr_test_exports(),
new_mock_session(), export_safely()) for use
in downstream package tests.expr
server return value component cond.get_board_option_value() to make available
current option settings via session$UserData.toolbar_ui() which takes case of the “core”
toolbar UI component.chr_ply() and related, as well as
miscellaneous utilities such as set_names(),
coal(), etc. are now exported for use in dependent
packages.export_code() to make it easier for third-party
generate_code() plugin implementations.evaluate::evaluate() to capture plots.new_fixed_block() for applying a fixed
(i.e. non-paramtetrized) transformation to data input.session.is_string(),
is_count(), etc.block_render_trigger() to control per block
class when to re-render the block output.reactiveValues() object containing notification types a
separate components.session$reload().These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.