This patch moves selection updates outside movement functions in
EditingEngine. Previously, movement functions would automatically
update the selection based on whether the Shift key was pressed down
during movement. However, not all EditingEngine subclasses want that;
VimEditingEngine being a good example (because all selection is handled
in visual mode).
Therefore, this patch moves all selection updating to
EditingEngine::on_key(). Subclasses wishing to provide custom movement
and selection semantics should override it (and VimEditingEngine already
does).
This patch implements Vim motions. The VimMotion class will accept
keycodes from the editing engine to build up a motion, and will
signal when a motion is complete via VimMotion::is_complete(). The
editing engine can then call VimMotion::get_range() to obtain a
TextRange object which can be used to perform operations on the text,
or VimMotion::get_position() to obtain a TextPosition which is the
new position of the cursor after the motion.
Currently, the following motions are supported:
- h/j/k/l, regular Vim line and character movements
- 0/^/$, start/end of line and start of non-blank
- w/e/b/ge, word-related movements
- W/E/B/gE, WORD (anything non-blank) versions of the above motions
- gg/G, document related movements
- t/f, to/find character
All motions except gg/G accept a number prefix to repeat the motion that
many times.
This patch updates insert, normal and visual modes to use this motion
system for movement.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)
Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.
We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.
Implemented move_to_beginning_of_next(), move_to_end_of_next(),
move_to_beginning_of_previous() and move_to_end_of_previous() functions
for more correct word jumping than the move_to_xxx_span() methods that
were previously used.
