- Code from Vim source.
- Removed the check for 'guioptions'
- mouse_spec.lua: test <ScrollWheelLeft> and <ScrollWheelRight>
- Move horizontal scroll logic to mouse.c
- Remove 'gui_' from the function names
- Renamed variables to be more specific (as opposed to generic p, w).
- Marked some functions as `static`
Problem: More problems reported by coverity.
Solution: Avoid the warnings. (Christian Brabandt)
cde8854730
Applied manually. Files that do not exst anymore: gui.c gui_w16.c gui_w32.c
if_xcmdsrv.c os_unix.c
Problem: Block-mode replace works characterwise instead of blockwise after
column 147. (Issue #422)
Solution: Set Visual mode. (Christian Brabandt)
10ad1d90da
Problem: "gv" after paste selects one character less if 'selection' is
"exclusive".
Solution: Increment the end position. (Christian Brabandt)
d29c6fea94
Problem: ml_get error when using "p" in a Visual selection in the last
line.
Solution: Change the behavior at the last line. (Yukihiro Nakadaira)
d009e86826
Problem: Dragging the current tab with the mouse doesn't work properly.
Solution: Take the current tabpage index into account. (Hirohito Higashi)
4a4b821085
Problem: Repeating a change in Visual mode does not work as expected.
(Urtica Dioica)
Solution: Make redo in Visual mode work better. (Christian Brabandt)
31b259bf95
Problem: CTRL-A and CTRL-X do not work properly with blockwise visual
selection if there is a mix of Tab and spaces.
Solution: Add OP_NR_ADD and OP_NR_SUB. (Hirohito Higashi)
d79e55016c
Problem: Using "." to repeat CTRL-A in Visual mode increments the wrong
numbers.
Solution: Append right size to the redo buffer. (Ozaki Kiichi)
e1edc1caba
Problem: Using CTRL-A in Visual mode does not work well. (Gary Johnson)
Solution: Make it increment all numbers in the Visual area. (Christian
Brabandt)
3a304b2382
Problem: Appending in Visual mode with 'linebreak' set does not work
properly. Also when 'selection' is "exclusive". (Ingo Karkat)
Solution: Recalculate virtual columns. (Christian Brabandt)
74db34cc91
Regarding the individual items in the header:
`Vim - Vi improved by Bram Moolenar`
Bram Moolenar is already mentioned throughout the documentation, as
well as the intro screen.
`:help uganda`
It's already shown to all users who don't use `shortmess+=I` upon
starting nvim, and is already placed prominently in help.txt, i.e.,
`:help` run with no arguments.
`:help credits`
Already mentioned near the top of help.txt.
`README.md`
Already mentioned in develop.txt.
Problem: Text deleted by "dit" depends on indent of closing tag.
(Jan Parthey)
Solution: Do not adjust oap->end in do_pending_operator(). (Christian
Brabandt)
b6c2735c56
Two new keys have been added to key_name_entry in keymap.c:
`FocusGained` and `FocusLost`.
Two cases have been added to the key handing switch in edit.c each
applying their respective autocmds.
In normal.c two functions have been added alongside nv_cursorhold doing
a similar job of applying the autocmd for the appropriate key.
tui/input.c has a new function `handle_focus_event` which eats either of
the control sequences for focus gained or lost. This function is checked
before handle_bracketed_paste and handle_forced_escape.
tui.c registers neovim as able to receive these control sequences in
terminfo_start and undoes that in terminfo_stop.
Closes#2302
Problem: "zr" and "zm" do not take a count.
Solution: Implement the count, restrict the fold level to the maximum
nesting depth. (Marcin Szamotulski)
7d2757a472
From a very high level point of view, Vim/Nvim can be described as state
machines following these instructions in a loop:
- Read user input
- Peform some action. The action is determined by the current state and can
switch states.
- Possibly display some feedback to the user.
This is not immediately visible because these instructions spread across dozens
of nested loops and function calls, making it very hard to modify the state
machine(to support more event types, for example).
So far, the approach Nvim has taken to allow more events is this:
- At the very core function that blocks for input, poll for arbitrary events.
- If the event received from the OS is user input, just return it normally to
the callers.
- If the event is not direct result of user input(possibly a vimscript function
call coming from a msgpack-rpc socket or a job control callback), return a
special key code(`K_EVENT`) that is handled by callers where it is safer to
perform arbitrary actions.
One problem with this approach is that the `K_EVENT` signal is being sent across
multiple states that may be unaware of it. This was partially fixed with the
`input_enable_events`/`input_disable_events` functions, which were added as a
mechanism that the upper layers can use to tell the core input functions that it
is ready to accept `K_EVENT`.
Another problem is that the mapping engine is implemented in getchar.c
which is called from every state, but the mapping engine is not aware of
`K_EVENT` so events can break mappings.
While it is theoretically possible to modify getchar.c to make it aware of
`K_EVENT`, this commit fixes the problem with a different approach: Model Nvim
as a pushdown automaton(https://en.wikipedia.org/wiki/Pushdown_automaton). This
design has many advantages which include:
- Decoupling the event loop from the states reponsible for handling events.
- Better control of state transition with less dependency on global variable
hacks(eg: 'restart_edit' global variable).
- Easier removal of global variables and function splitting. That is because
many variables are for state-specific information, and probably ended up being
global to simplify communication between functions, which we fix by storing
state-specific information in specialized structures.
The final goal is to let Nvim have a single top-level event loop represented by
the following pseudo-code:
```
while not quitting
let event = read_event
current_state(event)
update_screen()
```
This closely mirrors the state machine description above and makes it easier to
understand, extend and debug the program.
Note that while the pseudo code suggests an explicit stack of states that
doesn't rely on return addresses(as suggested by the principles of
automata-based programming:
https://en.wikipedia.org/wiki/Automata-based_programming), for now we'll use the
call stack as a structure to manage state transitioning as it would be very
difficult to refactor Nvim to use an explicit stack of states, and the benefits
would be small.
While this change may seem like an endless amount of work, it is possible to
do it incrementally as was shown in the previous commits. The general procedure
is:
1- Find a blocking `vgetc()`(or derivatives) call. This call represents an
implicit state of the program.
2- Split the code before and after the `vgetc()` call into functions that match
the signature of `state_check_callback` and `state_execute_callback.
Only `state_execute_callback` is required.
3- Create a `VimState` "subclass" and a initializer function that sets the
function pointers and performs any other required initialization steps. If
the state has no local variables, just use `VimState` without subclassing.
4- Instead of calling the original function containing the `vgetc()`,
initialize a stack-allocated `VimState` subclass, then call `state_enter` to
begin processing events in the state.
5- The check/execute callbacks can return 1 to continue normally, 0 to break the
loop or -1 to skip to the next iteration. These callbacks contain code that
execute before and after the old `vgetc()` call.
The functions created in step 2 may contain other `vgetc()` calls. These
represent implicit sub-states of the current state, but it is fine to remove
them later in smaller steps since we didn't break compatibility with existing
code.
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
What works:
1. ShaDa file dumping: header, registers, jump list, history, search patterns,
substitute strings, variables.
2. ShaDa file reading: registers, global marks, variables.
Most was not tested.
TODO:
1. Merging.
2. Reading history, local marks, jump and buffer lists.
3. Documentation update.
4. Converting some data from &encoding.
5. Safer variant of dumping viminfo (dump to temporary file then rename).
6. Removing old viminfo code (currently masked with `#if 0` in a ShaDa file for
reference).
