* Layers: run set-layer-visibility actions, keeping radio-button groups
The engine can apply a set-layer-visibility action (SetOCGState,
ISO 32000-2 §12.6.4.13) to a document's layers: each ON, OFF or Toggle
in order, naming the layer by its optional content group, so a toggle
sees the state the changes before it left. With /PreserveRB (the
default), a layer turned on turns off the other layers of its
radio-button groups, now read from /OCProperties /D /RBGroups; turning
one off leaves them alone. The renderer is rebuilt once per action, not
once per layer.
Like the Layers panel, this changes the view, not the document.
Tests: engine set_layer_actions_toggle_in_order_and_keep_radio_groups
and set_layer_actions_change_what_renders (pixels before and after),
render radio_button_layer_groups_are_read.
* Links: run set-layer-visibility actions
Clicking a link whose action is SetOCGState showed "SetOCGState actions
run in the JavaScript engine (M6)" and did nothing. Links now read the
action (/State, also when indirect, and /PreserveRB) and clicking runs
it; the Layers panel follows. Hovering shows "Set layer visibility"
(translated in the ja, es, zh-hans and zh-hant catalogs), and doc_info
describes the action in its link list.
Tests: render links_read_set_layer_actions, automation
doc_info_describes_set_layer_links and ui-egui
links_set_layer_visibility.
* Forms: push buttons run set-layer-visibility actions
A push button whose mouse-up action is SetOCGState counted as having no
action, so clicking it did nothing. Buttons now read the action as
links do, and clicking runs it.
Tests: forms push_buttons_read_set_layer_actions and ui-egui
push_buttons_set_layer_visibility.
parity: edit.action-set-ocg-state is partial. The notes say what is
missing: creating the action, bookmarks and other triggers, /Next
chains, JavaScript ocg.state, and the Layers panel keeping radio-button
groups itself.
* French: Set layer visibility
The French catalog is coverage-checked since #291.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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