&oldLayer store
Summary
The &oldLayer store reports on whether the user changed the active layer
in the previous keystroke. It is a read-only store used in begin PostKeystroke processing.
Syntax
if(&oldLayer = '') ... > ...
if(&oldLayer = 'shift') ... > ...Description
The &oldLayer system store is a read only store set immediately before
begin PostKeystroke is called, to the name of the previously
selected layer, if the previous keystroke changed the layer (e.g. by
the user touching a modifier key), or to an empty string ("") otherwise.
Keyman determines that a layer has changed in the following circumstances:
- If the user selects a key with a "next layer" property set to anything
other than
(none), even if set to the current layer. (This allows the keyboard to easily override switching on a single key). - If a rule is fired that calls the
layer()statement, even if the layer passed in is the same as the current layer.
At other times, the value of the &oldLayer store may not be current.
The &oldLayer store is used only in touch keyboards, and will always have
the value of "" in other contexts.
Platforms
While the &oldLayer store is accessible on all platforms, it only has
meaning on touch platforms (mobile web, iOS, Android).
| Windows | macOS | Linux | Desktop web | Mobile web | iOS | Android |
|---|---|---|---|---|---|---|
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
Version history
- Version 15.0:
&oldLayersupport introduced
