This extends the "normal" bind action enum with mouse specific
actions.
When parsing key bindings, we only check up to the last valid keyboard
binding, while mouse bindings support *both* key actions and mouse
actions.
The new actions are:
* select-begin: starts an interactive selection
* select-extend: interactively extend an existing selection
* select-word: select word under cursor
* select-word-whitespace: select word under cursor, where the only
word separating characters are whitespace characters.
The old hard-coded selection "bindings" have been converted to instead
use these actions, via default bindings added to the configuration.
This simplifies the handling of mouse and keyboard bindings.
Before, the bindings where parsed *both* when loading the
configuration, and then on every keyboard enter event. This was done
since keys require a keymap to be decoded. Something we don't have at
configuration time. The idea was that at config time, we used a
default keymap just to verify the key combo strings were valid.
The following has changed:
* The bindings in the config struct is now *one* key combo per
entry. Previously, it was one *action* per entry, and each entry
had one or more key combos.
Doing it this way makes it easier when converting the binding in the
keyboard enter event (which previously had to expand the combos
anyway).
* The bindings in the config struct no longer contains any unparsed
strings.
A key binding contains a decoded 'modifier' struct (which specifies
whether e.g. ctrl, or shift, or ctrl+shift must be pressed for the
binding to be used).
It also contains a decoded XKB keysym.
* A mouse binding in the config struct is similar to a key binding,
except it contains the button, and click count instead of the XKB
key sym.
* The modifiers in the user-specified key combo is decoded at config
time, by using the pre-defined XKB constants
XKB_MOD_NAME_<modifier>.
The result is stored in a 'modifiers' struct, which is just a
collection of booleans; one for each supported modifier.
The supported modifiers are: shift, ctrl, alt and meta/super.
* The key sym is decoded at config time using
xkb_keysym_from_name(). This call does *not* depend on a keymap.
* The mouse button is decoded at config time using a hardcoded mapping
table (just like before).
* The click count is currently hard-coded to 1.
* In the keyboard enter event, all we need to do is pre-compute the
xkb_mod_mask_t variable for each key/mouse binding, and find all the
*key codes* that map to the (already decoded) symbol.
For mouse bindings, the modifiers are the *only* reason we convert
the mouse bindings at all.
In fact, on button events, we check if the seat has a keyboard. If
not, we use the mouse bindings from the configuration directly, and
simply filter out those with a non-empty set of modifiers.
This can be set to 'none' (the default), 'osd', 'log' or 'both'.
When 'osd' is enabled, we'll render the frame rendering time to a
sub-surface after each frame.
When 'log' is enabled, the frame rendering time is logged on stderr.
Without this, the initial cell will always be selected, regardless of
how the selection is moved to the left or right.
With this patch, the initial cell will only be selected while the
selection is being made in the original direction. Changing direction
of the selection moves the start point to next/previous character.
The default is still to inverse the regular foreground/background
colors.
If the user sets *both* of the new options, selection-foreground and
selection-background, those colors will *always* be used for selected
cells, instead of inverting the regular foreground/background colors.
If the match was somewhere near the scrollback beginning, and if the
entire scrollback hadn't yet been filled, we ended up trying to move
the viewport past the beginning of the scrollback, which we then
adjusted in the wrong direction, causing the viewport to not move at
all.
Besides being a bad user experience, since the new match wasn't
visible, foot would also crash if you manually scrolled up to the
match.
While refactoring this code, the check for LMB or RMB got changed to
LMB or "any button".
This fixes that.
It also adds a boolean 'cursor_is_on_grid', which should make the code
easier to read and understand.
