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Lua support can now be disabled at compile time using:
$ make CONFIG_LUA=0
This commit also adds an initial Lua API and provides a few
default hooks.
We now also require Lua >= 5.2 due to the uservalue constructs.
In principle the same functionality could be implemented using
function environments from Lua 5.1.
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The only used event handler was used to update the '< and '>
marks which is now taken care of by the leave handler of the
visual modes.
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They now belong to the cell holding the corresponding regular
(i.e. non-combining) character. This also means that at least
in theory a cell could hold arbitrary amounts of data, in
practice it is limited to 16 bytes.
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The view_draw function renders the text into the cells
array and resyncs the cursor position. The syntax
highlighting is applied in view_update, which also
instructs the ui to update.
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The lua based lexers are searched in the following order:
$VIS_PATH/lexers
$HOME/.vis/lexers
/usr/share/vis/lexers
followed by the standard lua package.path
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Also text objects in visual mode should now work better.
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This commits introduces the following keybindings, in normal mode:
CTRL-N select word the cursor is currently over, switch to visual mode
CTRL-P remove least recently added cursor
ESC if a selection is active, clear it.
Otherwise dispose all but the primary cursor.
In visual mode:
CTRL-N create new cursor and select next word matching current selection
CTRL-X clear (skip) current selection, but select next matching word
CTRL-P remove least recently added cursor
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This cleans up the existing selection handling code and adds the
necessary bits to eventually support multiple cursors/selections.
The cursor position is kept track of using marks, which means
retrieving the cursor position is no longer a constant time operation.
Furthermore the terminal cursor is no longer used, instead the whole
window is redrawn after every cursor movement.
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By now ui-curses.[hc] are the only files dealing directly with
curses related functions. Integration of a proper mainloop is
still pending.
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Enable/disable by setting to 0/1 respectively:
:set show spaces=0 tabs=0 newlines=1
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While it is slower, it allows to move to characters which are
currently not visible. This will be handy when experimenting
with multiple cursors.
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View should only display the file content, but not modify it.
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