Adds the ability to re-assign which book a word belongs to
and change the name of an existing book. It can be used as
a way to regroup words and hide/show them by book.
This is made easier by the fact that only a single method in a single
widget actually handles Gesture, and that we barely ever overload it.
So, apply a bit of monkey-patching trickery to handle the magic :).
Fix#9695
defaults.persistent.lua
We were pcall'ing the parsing, but not the execution...
The funky Lua syntax quirks means that it is possible to pass the former
but not the latter ;).
Fix#9700, de-facto regression since #9546
Get rid of the doc & seqtext fields, as they are not actually used (nor
are they particularly useful, the event handler's name should be pretty
self-explanatory).
Also, tweak the key_events documentation to highlight the quirks of the
API, especially as far as array nesting is involved...
Random drive-by cleanup of the declarations of key_events & ges_events
to re-use the existing instance object (now that we know they're sane
;p) for tables with a single member (less GC pressure).
* Added a new plugin external-keyboard. It listens to USB events. When keyboard is plugged in or plugged out, it updates device and input configuration accordingly.
* Added new fake events UsbDevicePlugIn and UsbDevicePlugOut that are emitted when a device is connected to a book reader that plays the role of USB host. The usage of the existing events UsbPlugIn and UsbPlugOut has not changed - they are used when a reader is connected to a host. The koreader-base has a related PR for those events.
* Did a small refactoring of initialization for the modules FocusManager and InputText. They check device keyboard capabilities on their when the module is first loaded and store it. Some of the initialization code has been extracted into functions, so that we can re-initialize them when keyboard is (dis)connected.
* Initial implementation centered around text input, and tested with USB keyboards on devices with OTG support.
* Said OTG shenanigans are so far supported on devices with debugfs & the chipidea driver, or sunxi devices.
If you've ever enabled the main loop debugging, you'll know that
actually dumping the full window stack was *hilarious*.
Just print table counts, it's often good enough to debug what's
happening in the exceedingly rare cases you need this ;).
Also, it'll actually be readable, unlike the previous insanity ^^.
