Prevent next-buffer, other-buffer, etc. from choosing useless buffers.
No need for spacemacs/next-useful-buffer,
spacemacs/previous-useful-buffer anymore.
Also fix spacemacs/alternate-buffer to respect buffer-predicate.
When spacemacs-layouts is used, buffer-predicate filters useful buffer
that belong to the current layout.
It is better to directly hook function using the conventional hook
functions.
Replace usage of (concat ...) by a (format ...) from which is more
readable.
The motivation is to clean redundent actions and bring more consistency
between `SPC b` and `SPC w` by:
- using capital letters for ace-window actions
- reusing the same letters between window and buffer when possible
- adding support for universal prefix argument to delete both window
and buffer
Details of changes:
Buffer
- `SPC b k` has been removed since the functionality is
available directly in Helm by selecting the kill buffer action
- `SPC b m` (buffer move) has been removed because the functionality
is available via `SPC w` with `SPC w h/j/k/l`, `SPC w H/J/K/L` and
`SPC w M` (see window section for the new `SPC w M`).
- `SPC b K` (kill other buffers) is now `SPC b m` to map with `SPC w m`
(kill other window or maximize). Using the universal prefix argument
`SPC u SPC b m` will also kill the windows.
- `SPC b C-k` (kill buffer matching regexp) is now simply on `SPC b k`.
- `SPC b D` now kills a buffer using ace-window.
- `SPC b d` and `SPC b D` now accept an universal prefix argument to
also delete the window. So `SPC u SPC b d` and `SPC u SPC b D` delete
the buffer and the window.
Window
- `SPC w M` now swap the window using ace-window.
- old `SPC w M` (center window) is now on `SPC w c` and `SPC w C` uses
ace-window.
- `SPC w SPC` (select window) is now on `SPC w W` since it uses
ace-window.
- `SPC w d` and `SPC w D` now accepts an universal prefix argument to
delete the window and the buffer.
Implement a delegate function that decides which system to use. Also
check for the visibility of any next-error valid buffer, not just
compilation buffers.
