While Keyman Core already supported the base layout flags, they were not
being passed in from Keyman Engine for Windows. This meant that any
rules that used `baselayout` would fail, such as in sil_ipa with AltGr+0
for }
0bf72bed74/release/sil/sil_ipa/source/sil_ipa.kmn (L348-L350)
This patch adds support for the following properties:
* KM_KBP_KMX_ENV_BASELAYOUT: the legacy base layout name, e.g. kbdus.dll
* KM_KBP_KMX_ENV_BASELAYOUTALT: the BCP 47 base layout name, e.g. en-US
* KM_KBP_KMX_ENV_SIMULATEALTGR: whether the user has selected to emulate
AltGr with Ctrl+Alt, for example on laptops without a right alt key.
* KM_KBP_KMX_ENV_BASELAYOUTGIVESCTRLRALTFORRALT: whether the system base
layout in use generates Ctrl+RAlt when RAlt is pressed, which can be
true for many European system layouts. This is necessary when
associating the keyboard with a European language because the base
keyboard becomes the language's default keyboard, rather than kbdus.
Matches work completed in #5169 for Keyman Core, kmx_file.cpp.
While this code will hopefully disappear in 15.0, it's good to make sure
we aren't diverging beforehand.
Also tidies up a couple of other cases in `CopyKeyboard` in Keyman Core.
[Windows] More tidyup and robustness for metro app support - debug cleanup and serialization of input (not quite finished)
[windows] Refactor serialized input code when used with key event thread model
[windows] Add consistent precompiled headers for other projects
[windows] Merge console window test into metro support
[Windows] Tidy up work and identify additional TODOs for metro-style app support
[Windows] Ensure error case falls through to default hook processing for console windows
[Windows] Refactor shared memory into memory mapped file so we can cross 32-64 bit boundary
[Windows] Tweaks to C++ security calls and parameters
[Windows] Start refactor of SerialKeyEvent* classes
[Windows] Rename to SerialKeyEventServer (refactoring)
[Windows] Complete refactoring of SerialKeyEventClient class
[Windows] Further encapsulation and cleanup with 'interfaces' to reduce header pollution
[Windows] Complete serialization fix with move of modifier state management from client thread to server thread to guarantee consistency
[Windows] Replace atom-based keyboard switching with memory mapped file indexed to avoid security constraints
[Windows] Fixup Left Alt+Shift interaction with serializer
[Windows] Use Windows 8.1 SDK for test
