This makes it impossible for K_EVENT to interfere with mappings, but it also
disables processing of events while in the middle of a mapping (Though this will
be fixed later as this refactoring progresses).
`may_sync_undo` is now called when K_EVENT is received. This is necessary to
correctly update undo entry lists before executing some action.
`normal_prepare` is now called by `normal_check` before returning 1(to
continue).
Also remove `input_{enable,disable}_events` calls from `normal_cmd`, which only
exists now as a compatibility function to run normal commands with keys inserted
into the typeahead buffer(We don't want to process events in these cases
anyway).
Refactor input.c, normal.c and edit.c to use the K_EVENT special key to trigger
the CURSORHOLD event. In normal and edit mode, K_EVENT is treated as
K_CURSORHOLD, which enables better handling of arbitrary actions in those
states(eg: In normal mode the previous operator counts will be restored).
Also fix a test in vim_spec.lua. The test had a wrong assumption: cmdheight is
only used to determine when the press enter screen will be shown, not to limit
how many lines or control pagination.
The new function contains logic that must be executed after handling input in
normal mode and also before the first main loop iteration. Also rename
`main_loop` to `normal_enter` and move it to normal.c
Problem: Moving the cursor in Insert mode starts new undo sequence.
Solution: Add CTRL-G U to keep the undo sequence for the following
cursor movement command. (Christian Brabandt)
8b5f65a527Closes#3492
Note about ~/.local/share/nvim/site used in one usr_\* file: this one talks
about user-local installation of third-party plugins, and
~/.local/share/nvim/site is the proper place for them. Most other files talk
about user own configuration and this is ~/.config.
This is none of option.c business to create *possibly unneeded* **default**
directories **before** user specified where he actually wants to place the
files.
