osx shadow keyboard layout support

[Antoine Martin]

See ticket:391#comment:12

[Antoine Martin]

Some fixes already: r12628 + r12626 + r12624. See also #1172.

Looks like there aren't virtual keycodes for most of the keys, so we will have to use something like this ​How to convert ASCII character to CGKeyCode.

Here are some of the missing keys: exclam quotedbl sterling dollar percent asciicircum ampersand asterisk parenleft parenright braceleft braceright underscore colon at numbersign asciitilde comma period slash less greater question notsign bar
'fr' layout: eacute egrave ccedilla agrave dead_circumflex one_superior two_superior section percent mu dead_diaresis degree currency horizconnector periodcentered dead_belowdot exclamdown oneeighth threeeights fiveeights seveneights trademark plusminus degree questiondown

[Antoine Martin]

Related ticket: OSX client keyboard layout detection #1444

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Maybe we should also set the modifier flags on key events using ​CGEventSetFlags

​Text_Input_Sources, of particular interest:

• kTISPropertyInputSourceLanguages
• kTISNotifySelectedKeyboardInputSourceChanged: '
• TISSelectInputSource : to set a particular layout. See for example ​LayoutTracker.

More links:

• ​pyobjc-framework-InputMethodKit: pyobjc wrapper for ​InputMethodKit
• ​input_source.py: list all input sources
• ​pykeycode: Python wrapper around the Mac TIS functions to convert between chars and keycodes
• ​Character code translation table for Mac/PC/Linux

[Antoine Martin]

Don't have time, but this looks like it would help: ​https://github.com/jonathanlurie/PyUserInputGen/blob/master/pykeyboard/mac.py (has a keymap for AZERTY)

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/1171