helix-mirror/helix-term/src/commands.rs
2021-08-20 13:42:47 +09:00

4243 lines
134 KiB
Rust

use helix_core::{
comment, coords_at_pos, find_first_non_whitespace_char, find_root, graphemes, indent,
indent::IndentStyle,
line_ending::{get_line_ending_of_str, line_end_char_index, str_is_line_ending},
match_brackets,
movement::{self, Direction},
object, pos_at_coords,
regex::{self, Regex},
register::Register,
search, selection, surround, textobject, LineEnding, Position, Range, Rope, RopeGraphemes,
RopeSlice, Selection, SmallVec, Tendril, Transaction,
};
use helix_view::{
clipboard::ClipboardType, document::Mode, editor::Action, input::KeyEvent, keyboard::KeyCode,
view::View, Document, DocumentId, Editor, ViewId,
};
use anyhow::{anyhow, bail, Context as _};
use helix_lsp::{
lsp,
util::{lsp_pos_to_pos, lsp_range_to_range, pos_to_lsp_pos, range_to_lsp_range},
OffsetEncoding,
};
use insert::*;
use movement::Movement;
use crate::{
compositor::{self, Component, Compositor},
ui::{self, FilePicker, Picker, Popup, Prompt, PromptEvent},
};
use crate::job::{self, Job, Jobs};
use futures_util::FutureExt;
use std::num::NonZeroUsize;
use std::{fmt, future::Future};
use std::{
borrow::Cow,
path::{Path, PathBuf},
};
use once_cell::sync::Lazy;
use serde::de::{self, Deserialize, Deserializer};
pub struct Context<'a> {
pub selected_register: helix_view::RegisterSelection,
pub count: Option<NonZeroUsize>,
pub editor: &'a mut Editor,
pub callback: Option<crate::compositor::Callback>,
pub on_next_key_callback: Option<Box<dyn FnOnce(&mut Context, KeyEvent)>>,
pub jobs: &'a mut Jobs,
}
impl<'a> Context<'a> {
/// Push a new component onto the compositor.
pub fn push_layer(&mut self, component: Box<dyn Component>) {
self.callback = Some(Box::new(|compositor: &mut Compositor| {
compositor.push(component)
}));
}
#[inline]
pub fn on_next_key(
&mut self,
on_next_key_callback: impl FnOnce(&mut Context, KeyEvent) + 'static,
) {
self.on_next_key_callback = Some(Box::new(on_next_key_callback));
}
#[inline]
pub fn callback<T, F>(
&mut self,
call: impl Future<Output = helix_lsp::Result<serde_json::Value>> + 'static + Send,
callback: F,
) where
T: for<'de> serde::Deserialize<'de> + Send + 'static,
F: FnOnce(&mut Editor, &mut Compositor, T) + Send + 'static,
{
let callback = Box::pin(async move {
let json = call.await?;
let response = serde_json::from_value(json)?;
let call: job::Callback =
Box::new(move |editor: &mut Editor, compositor: &mut Compositor| {
callback(editor, compositor, response)
});
Ok(call)
});
self.jobs.callback(callback);
}
/// Returns 1 if no explicit count was provided
#[inline]
pub fn count(&self) -> usize {
self.count.map_or(1, |v| v.get())
}
}
enum Align {
Top,
Center,
Bottom,
}
fn align_view(doc: &Document, view: &mut View, align: Align) {
let pos = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let line = doc.text().char_to_line(pos);
let height = view.inner_area().height as usize;
let relative = match align {
Align::Center => height / 2,
Align::Top => 0,
Align::Bottom => height,
};
view.offset.row = line.saturating_sub(relative);
}
/// A command is composed of a static name, and a function that takes the current state plus a count,
/// and does a side-effect on the state (usually by creating and applying a transaction).
#[derive(Copy, Clone)]
pub struct Command {
name: &'static str,
fun: fn(cx: &mut Context),
doc: &'static str,
}
macro_rules! commands {
( $($name:ident, $doc:literal),* ) => {
$(
#[allow(non_upper_case_globals)]
pub const $name: Self = Self {
name: stringify!($name),
fun: $name,
doc: $doc
};
)*
pub const COMMAND_LIST: &'static [Self] = &[
$( Self::$name, )*
];
}
}
impl Command {
pub fn execute(&self, cx: &mut Context) {
(self.fun)(cx);
}
pub fn name(&self) -> &'static str {
self.name
}
pub fn doc(&self) -> &'static str {
self.doc
}
#[rustfmt::skip]
commands!(
move_char_left, "Move left",
move_char_right, "Move right",
move_line_up, "Move up",
move_line_down, "Move down",
extend_char_left, "Extend left",
extend_char_right, "Extend right",
extend_line_up, "Extend up",
extend_line_down, "Extend down",
copy_selection_on_next_line, "Copy selection on next line",
copy_selection_on_prev_line, "Copy selection on previous line",
move_next_word_start, "Move to beginning of next word",
move_prev_word_start, "Move to beginning of previous word",
move_next_word_end, "Move to end of next word",
move_next_long_word_start, "Move to beginning of next long word",
move_prev_long_word_start, "Move to beginning of previous long word",
move_next_long_word_end, "Move to end of next long word",
extend_next_word_start, "Extend to beginning of next word",
extend_prev_word_start, "Extend to beginning of previous word",
extend_next_word_end, "Extend to end of next word",
find_till_char, "Move till next occurance of char",
find_next_char, "Move to next occurance of char",
extend_till_char, "Extend till next occurance of char",
extend_next_char, "Extend to next occurance of char",
till_prev_char, "Move till previous occurance of char",
find_prev_char, "Move to previous occurance of char",
extend_till_prev_char, "Extend till previous occurance of char",
extend_prev_char, "Extend to previous occurance of char",
replace, "Replace with new char",
switch_case, "Switch (toggle) case",
switch_to_uppercase, "Switch to uppercase",
switch_to_lowercase, "Switch to lowercase",
page_up, "Move page up",
page_down, "Move page down",
half_page_up, "Move half page up",
half_page_down, "Move half page down",
select_all, "Select whole document",
select_regex, "Select all regex matches inside selections",
split_selection, "Split selection into subselections on regex matches",
split_selection_on_newline, "Split selection on newlines",
search, "Search for regex pattern",
search_next, "Select next search match",
extend_search_next, "Add next search match to selection",
search_selection, "Use current selection as search pattern",
extend_line, "Select current line, if already selected, extend to next line",
extend_to_line_bounds, "Extend selection to line bounds (line-wise selection)",
delete_selection, "Delete selection",
change_selection, "Change selection (delete and enter insert mode)",
collapse_selection, "Collapse selection onto a single cursor",
flip_selections, "Flip selection cursor and anchor",
insert_mode, "Insert before selection",
append_mode, "Insert after selection (append)",
command_mode, "Enter command mode",
file_picker, "Open file picker",
code_action, "Perform code action",
buffer_picker, "Open buffer picker",
symbol_picker, "Open symbol picker",
last_picker, "Open last picker",
prepend_to_line, "Insert at start of line",
append_to_line, "Insert at end of line",
open_below, "Open new line below selection",
open_above, "Open new line above selection",
normal_mode, "Enter normal mode",
select_mode, "Enter selection extend mode",
exit_select_mode, "Exit selection mode",
goto_definition, "Goto definition",
goto_type_definition, "Goto type definition",
goto_implementation, "Goto implementation",
goto_file_start, "Goto file start/line",
goto_file_end, "Goto file end",
goto_reference, "Goto references",
goto_window_top, "Goto window top",
goto_window_middle, "Goto window middle",
goto_window_bottom, "Goto window bottom",
goto_last_accessed_file, "Goto last accessed file",
goto_line, "Goto line",
goto_last_line, "Goto last line",
goto_first_diag, "Goto first diagnostic",
goto_last_diag, "Goto last diagnostic",
goto_next_diag, "Goto next diagnostic",
goto_prev_diag, "Goto previous diagnostic",
goto_line_start, "Goto line start",
goto_line_end, "Goto line end",
// TODO: different description ?
goto_line_end_newline, "Goto line end",
goto_first_nonwhitespace, "Goto first non-blank in line",
signature_help, "Show signature help",
insert_tab, "Insert tab char",
insert_newline, "Insert newline char",
delete_char_backward, "Delete previous char",
delete_char_forward, "Delete next char",
delete_word_backward, "Delete previous word",
undo, "Undo change",
redo, "Redo change",
yank, "Yank selection",
yank_joined_to_clipboard, "Join and yank selections to clipboard",
yank_main_selection_to_clipboard, "Yank main selection to clipboard",
yank_joined_to_primary_clipboard, "Join and yank selections to primary clipboard",
yank_main_selection_to_primary_clipboard, "Yank main selection to primary clipboard",
replace_with_yanked, "Replace with yanked text",
replace_selections_with_clipboard, "Replace selections by clipboard content",
replace_selections_with_primary_clipboard, "Replace selections by primary clipboard content",
paste_after, "Paste after selection",
paste_before, "Paste before selection",
paste_clipboard_after, "Paste clipboard after selections",
paste_clipboard_before, "Paste clipboard before selections",
paste_primary_clipboard_after, "Paste primary clipboard after selections",
paste_primary_clipboard_before, "Paste primary clipboard before selections",
indent, "Indent selection",
unindent, "Unindent selection",
format_selections, "Format selection",
join_selections, "Join lines inside selection",
keep_selections, "Keep selections matching regex",
keep_primary_selection, "Keep primary selection",
completion, "Invoke completion popup",
hover, "Show docs for item under cursor",
toggle_comments, "Comment/uncomment selections",
rotate_selections_forward, "Rotate selections forward",
rotate_selections_backward, "Rotate selections backward",
rotate_selection_contents_forward, "Rotate selection contents forward",
rotate_selection_contents_backward, "Rotate selections contents backward",
expand_selection, "Expand selection to parent syntax node",
jump_forward, "Jump forward on jumplist",
jump_backward, "Jump backward on jumplist",
rotate_view, "Goto next window",
hsplit, "Horizontal bottom split",
vsplit, "Vertical right split",
wclose, "Close window",
select_register, "Select register",
align_view_middle, "Align view middle",
align_view_top, "Align view top",
align_view_center, "Align view center",
align_view_bottom, "Align view bottom",
scroll_up, "Scroll view up",
scroll_down, "Scroll view down",
match_brackets, "Goto matching bracket",
surround_add, "Surround add",
surround_replace, "Surround replace",
surround_delete, "Surround delete",
select_textobject_around, "Select around object",
select_textobject_inner, "Select inside object",
suspend, "Suspend"
);
}
impl fmt::Debug for Command {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let Command { name, .. } = self;
f.debug_tuple("Command").field(name).finish()
}
}
impl fmt::Display for Command {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let Command { name, .. } = self;
f.write_str(name)
}
}
impl std::str::FromStr for Command {
type Err = anyhow::Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Command::COMMAND_LIST
.iter()
.copied()
.find(|cmd| cmd.name == s)
.ok_or_else(|| anyhow!("No command named '{}'", s))
}
}
impl<'de> Deserialize<'de> for Command {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
s.parse().map_err(de::Error::custom)
}
}
impl PartialEq for Command {
fn eq(&self, other: &Self) -> bool {
self.name() == other.name()
}
}
fn move_char_left(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_horizontally(text, range, Direction::Backward, count, Movement::Move)
});
doc.set_selection(view.id, selection);
}
fn move_char_right(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_horizontally(text, range, Direction::Forward, count, Movement::Move)
});
doc.set_selection(view.id, selection);
}
fn move_line_up(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_vertically(text, range, Direction::Backward, count, Movement::Move)
});
doc.set_selection(view.id, selection);
}
fn move_line_down(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_vertically(text, range, Direction::Forward, count, Movement::Move)
});
doc.set_selection(view.id, selection);
}
fn goto_line_end(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let line = range.cursor_line(text);
let line_start = text.line_to_char(line);
let pos = graphemes::prev_grapheme_boundary(text, line_end_char_index(&text, line))
.max(line_start);
range.put_cursor(text, pos, doc.mode == Mode::Select)
});
doc.set_selection(view.id, selection);
}
fn goto_line_end_newline(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let line = range.cursor_line(text);
let pos = line_end_char_index(&text, line);
range.put_cursor(text, pos, doc.mode == Mode::Select)
});
doc.set_selection(view.id, selection);
}
fn goto_line_start(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let line = range.cursor_line(text);
// adjust to start of the line
let pos = text.line_to_char(line);
range.put_cursor(text, pos, doc.mode == Mode::Select)
});
doc.set_selection(view.id, selection);
}
fn goto_first_nonwhitespace(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let line = range.cursor_line(text);
if let Some(pos) = find_first_non_whitespace_char(text.line(line)) {
let pos = pos + text.line_to_char(line);
range.put_cursor(text, pos, doc.mode == Mode::Select)
} else {
range
}
});
doc.set_selection(view.id, selection);
}
fn goto_window(cx: &mut Context, align: Align) {
let (view, doc) = current!(cx.editor);
let height = view.inner_area().height as usize;
// - 1 so we have at least one gap in the middle.
// a height of 6 with padding of 3 on each side will keep shifting the view back and forth
// as we type
let scrolloff = cx.editor.config.scrolloff.min(height.saturating_sub(1) / 2);
let last_line = view.last_line(doc);
let line = match align {
Align::Top => (view.offset.row + scrolloff),
Align::Center => (view.offset.row + (height / 2)),
Align::Bottom => last_line.saturating_sub(scrolloff),
}
.min(last_line.saturating_sub(scrolloff));
let pos = doc.text().line_to_char(line);
doc.set_selection(view.id, Selection::point(pos));
}
fn goto_window_top(cx: &mut Context) {
goto_window(cx, Align::Top)
}
fn goto_window_middle(cx: &mut Context) {
goto_window(cx, Align::Center)
}
fn goto_window_bottom(cx: &mut Context) {
goto_window(cx, Align::Bottom)
}
fn move_next_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_next_word_start(text, range, count));
doc.set_selection(view.id, selection);
}
fn move_prev_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_prev_word_start(text, range, count));
doc.set_selection(view.id, selection);
}
fn move_next_word_end(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_next_word_end(text, range, count));
doc.set_selection(view.id, selection);
}
fn move_next_long_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_next_long_word_start(text, range, count));
doc.set_selection(view.id, selection);
}
fn move_prev_long_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_prev_long_word_start(text, range, count));
doc.set_selection(view.id, selection);
}
fn move_next_long_word_end(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_next_long_word_end(text, range, count));
doc.set_selection(view.id, selection);
}
fn goto_file_start(cx: &mut Context) {
if cx.count.is_some() {
goto_line(cx);
} else {
push_jump(cx.editor);
let (view, doc) = current!(cx.editor);
doc.set_selection(view.id, Selection::point(0));
}
}
fn goto_file_end(cx: &mut Context) {
push_jump(cx.editor);
let (view, doc) = current!(cx.editor);
doc.set_selection(view.id, Selection::point(doc.text().len_chars()));
}
fn extend_next_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let word = movement::move_next_word_start(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection);
}
fn extend_prev_word_start(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let word = movement::move_prev_word_start(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection);
}
fn extend_next_word_end(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let word = movement::move_next_word_end(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection);
}
#[inline]
fn find_char_impl<F>(cx: &mut Context, search_fn: F, inclusive: bool, extend: bool)
where
F: Fn(RopeSlice, char, usize, usize, bool) -> Option<usize> + 'static,
{
// TODO: count is reset to 1 before next key so we move it into the closure here.
// Would be nice to carry over.
let count = cx.count();
// need to wait for next key
// TODO: should this be done by grapheme rather than char? For example,
// we can't properly handle the line-ending CRLF case here in terms of char.
cx.on_next_key(move |cx, event| {
let ch = match event {
KeyEvent {
code: KeyCode::Enter,
..
} =>
// TODO: this isn't quite correct when CRLF is involved.
// This hack will work in most cases, since documents don't
// usually mix line endings. But we should fix it eventually
// anyway.
{
current!(cx.editor)
.1
.line_ending
.as_str()
.chars()
.next()
.unwrap()
}
KeyEvent {
code: KeyCode::Char(ch),
..
} => ch,
_ => return,
};
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
// TODO: use `Range::cursor()` here instead. However, that works in terms of
// graphemes, whereas this function doesn't yet. So we're doing the same logic
// here, but just in terms of chars instead.
let search_start_pos = if range.anchor < range.head {
range.head - 1
} else {
range.head
};
search_fn(text, ch, search_start_pos, count, inclusive).map_or(range, |pos| {
if extend {
range.put_cursor(text, pos, true)
} else {
Range::point(range.cursor(text)).put_cursor(text, pos, true)
}
})
});
doc.set_selection(view.id, selection);
})
}
fn find_next_char_impl(
text: RopeSlice,
ch: char,
pos: usize,
n: usize,
inclusive: bool,
) -> Option<usize> {
let pos = (pos + 1).min(text.len_chars());
if inclusive {
search::find_nth_next(text, ch, pos, n)
} else {
search::find_nth_next(text, ch, pos, n).map(|n| n.saturating_sub(1))
}
}
fn find_prev_char_impl(
text: RopeSlice,
ch: char,
pos: usize,
n: usize,
inclusive: bool,
) -> Option<usize> {
if inclusive {
search::find_nth_prev(text, ch, pos, n)
} else {
search::find_nth_prev(text, ch, pos, n).map(|n| (n + 1).min(text.len_chars()))
}
}
fn find_till_char(cx: &mut Context) {
find_char_impl(
cx,
find_next_char_impl,
false, /* inclusive */
false, /* extend */
)
}
fn find_next_char(cx: &mut Context) {
find_char_impl(
cx,
find_next_char_impl,
true, /* inclusive */
false, /* extend */
)
}
fn extend_till_char(cx: &mut Context) {
find_char_impl(
cx,
find_next_char_impl,
false, /* inclusive */
true, /* extend */
)
}
fn extend_next_char(cx: &mut Context) {
find_char_impl(
cx,
find_next_char_impl,
true, /* inclusive */
true, /* extend */
)
}
fn till_prev_char(cx: &mut Context) {
find_char_impl(
cx,
find_prev_char_impl,
false, /* inclusive */
false, /* extend */
)
}
fn find_prev_char(cx: &mut Context) {
find_char_impl(
cx,
find_prev_char_impl,
true, /* inclusive */
false, /* extend */
)
}
fn extend_till_prev_char(cx: &mut Context) {
find_char_impl(
cx,
find_prev_char_impl,
false, /* inclusive */
true, /* extend */
)
}
fn extend_prev_char(cx: &mut Context) {
find_char_impl(
cx,
find_prev_char_impl,
true, /* inclusive */
true, /* extend */
)
}
fn replace(cx: &mut Context) {
let mut buf = [0u8; 4]; // To hold utf8 encoded char.
// need to wait for next key
cx.on_next_key(move |cx, event| {
let (view, doc) = current!(cx.editor);
let ch = match event {
KeyEvent {
code: KeyCode::Char(ch),
..
} => Some(&ch.encode_utf8(&mut buf[..])[..]),
KeyEvent {
code: KeyCode::Enter,
..
} => Some(doc.line_ending.as_str()),
_ => None,
};
let selection = doc.selection(view.id);
if let Some(ch) = ch {
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
if !range.is_empty() {
let text: String =
RopeGraphemes::new(doc.text().slice(range.from()..range.to()))
.map(|g| {
let cow: Cow<str> = g.into();
if str_is_line_ending(&cow) {
cow
} else {
ch.into()
}
})
.collect();
(range.from(), range.to(), Some(text.into()))
} else {
// No change.
(range.from(), range.to(), None)
}
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
})
}
fn switch_case(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
let text: Tendril = range
.fragment(doc.text().slice(..))
.chars()
.flat_map(|ch| {
if ch.is_lowercase() {
ch.to_uppercase().collect()
} else if ch.is_uppercase() {
ch.to_lowercase().collect()
} else {
vec![ch]
}
})
.collect();
(range.from(), range.to(), Some(text))
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn switch_to_uppercase(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
let text: Tendril = range.fragment(doc.text().slice(..)).to_uppercase().into();
(range.from(), range.to(), Some(text))
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn switch_to_lowercase(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
let text: Tendril = range.fragment(doc.text().slice(..)).to_lowercase().into();
(range.from(), range.to(), Some(text))
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
pub fn scroll(cx: &mut Context, offset: usize, direction: Direction) {
use Direction::*;
let (view, doc) = current!(cx.editor);
let range = doc.selection(view.id).primary();
let text = doc.text().slice(..);
let cursor = coords_at_pos(text, range.cursor(text));
let doc_last_line = doc.text().len_lines().saturating_sub(1);
let last_line = view.last_line(doc);
if direction == Backward && view.offset.row == 0
|| direction == Forward && last_line == doc_last_line
{
return;
}
let height = view.inner_area().height;
let scrolloff = cx.editor.config.scrolloff.min(height as usize / 2);
view.offset.row = match direction {
Forward => view.offset.row + offset,
Backward => view.offset.row.saturating_sub(offset),
}
.min(doc_last_line);
// recalculate last line
let last_line = view.last_line(doc);
// clamp into viewport
let line = cursor
.row
.max(view.offset.row + scrolloff)
.min(last_line.saturating_sub(scrolloff));
let head = pos_at_coords(text, Position::new(line, cursor.col), true); // this func will properly truncate to line end
let anchor = if doc.mode == Mode::Select {
range.anchor
} else {
head
};
// TODO: only manipulate main selection
doc.set_selection(view.id, Selection::single(anchor, head));
}
fn page_up(cx: &mut Context) {
let view = view!(cx.editor);
let offset = view.inner_area().height as usize;
scroll(cx, offset, Direction::Backward);
}
fn page_down(cx: &mut Context) {
let view = view!(cx.editor);
let offset = view.inner_area().height as usize;
scroll(cx, offset, Direction::Forward);
}
fn half_page_up(cx: &mut Context) {
let view = view!(cx.editor);
let offset = view.inner_area().height as usize / 2;
scroll(cx, offset, Direction::Backward);
}
fn half_page_down(cx: &mut Context) {
let view = view!(cx.editor);
let offset = view.inner_area().height as usize / 2;
scroll(cx, offset, Direction::Forward);
}
fn extend_char_left(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_horizontally(text, range, Direction::Backward, count, Movement::Extend)
});
doc.set_selection(view.id, selection);
}
fn extend_char_right(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_horizontally(text, range, Direction::Forward, count, Movement::Extend)
});
doc.set_selection(view.id, selection);
}
fn copy_selection_on_line(cx: &mut Context, direction: Direction) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
let mut ranges = SmallVec::with_capacity(selection.ranges().len() * (count + 1));
ranges.extend_from_slice(selection.ranges());
let mut primary_index = 0;
for range in selection.iter() {
let is_primary = *range == selection.primary();
let head_pos = coords_at_pos(text, range.head);
let anchor_pos = coords_at_pos(text, range.anchor);
let height = std::cmp::max(head_pos.row, anchor_pos.row)
- std::cmp::min(head_pos.row, anchor_pos.row)
+ 1;
if is_primary {
primary_index = ranges.len();
}
ranges.push(*range);
let mut sels = 0;
let mut i = 0;
while sels < count {
let offset = (i + 1) * height;
let anchor_row = match direction {
Direction::Forward => anchor_pos.row + offset,
Direction::Backward => anchor_pos.row.saturating_sub(offset),
};
let head_row = match direction {
Direction::Forward => head_pos.row + offset,
Direction::Backward => head_pos.row.saturating_sub(offset),
};
if anchor_row >= text.len_lines() || head_row >= text.len_lines() {
break;
}
let anchor = pos_at_coords(text, Position::new(anchor_row, anchor_pos.col), true);
let head = pos_at_coords(text, Position::new(head_row, head_pos.col), true);
// skip lines that are too short
if coords_at_pos(text, anchor).col == anchor_pos.col
&& coords_at_pos(text, head).col == head_pos.col
{
if is_primary {
primary_index = ranges.len();
}
ranges.push(Range::new(anchor, head));
sels += 1;
}
i += 1;
}
}
let selection = Selection::new(ranges, primary_index);
doc.set_selection(view.id, selection);
}
fn copy_selection_on_prev_line(cx: &mut Context) {
copy_selection_on_line(cx, Direction::Backward)
}
fn copy_selection_on_next_line(cx: &mut Context) {
copy_selection_on_line(cx, Direction::Forward)
}
fn extend_line_up(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_vertically(text, range, Direction::Backward, count, Movement::Extend)
});
doc.set_selection(view.id, selection);
}
fn extend_line_down(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
movement::move_vertically(text, range, Direction::Forward, count, Movement::Extend)
});
doc.set_selection(view.id, selection);
}
fn select_all(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let end = doc.text().len_chars();
doc.set_selection(view.id, Selection::single(0, end))
}
fn select_regex(cx: &mut Context) {
let prompt = ui::regex_prompt(cx, "select:".to_string(), move |view, doc, _, regex| {
let text = doc.text().slice(..);
if let Some(selection) = selection::select_on_matches(text, doc.selection(view.id), &regex)
{
doc.set_selection(view.id, selection);
}
});
cx.push_layer(Box::new(prompt));
}
fn split_selection(cx: &mut Context) {
let prompt = ui::regex_prompt(cx, "split:".to_string(), move |view, doc, _, regex| {
let text = doc.text().slice(..);
let selection = selection::split_on_matches(text, doc.selection(view.id), &regex);
doc.set_selection(view.id, selection);
});
cx.push_layer(Box::new(prompt));
}
fn split_selection_on_newline(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
// only compile the regex once
#[allow(clippy::trivial_regex)]
static REGEX: Lazy<Regex> =
Lazy::new(|| Regex::new(r"\r\n|[\n\r\u{000B}\u{000C}\u{0085}\u{2028}\u{2029}]").unwrap());
let selection = selection::split_on_matches(text, doc.selection(view.id), &REGEX);
doc.set_selection(view.id, selection);
}
fn search_impl(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, extend: bool) {
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
// Get the right side of the primary block cursor.
let start = text.char_to_byte(graphemes::next_grapheme_boundary(
text,
selection.primary().cursor(text),
));
// use find_at to find the next match after the cursor, loop around the end
// Careful, `Regex` uses `bytes` as offsets, not character indices!
let mat = regex
.find_at(contents, start)
.or_else(|| regex.find(contents));
// TODO: message on wraparound
if let Some(mat) = mat {
let start = text.byte_to_char(mat.start());
let end = text.byte_to_char(mat.end());
if end == 0 {
// skip empty matches that don't make sense
return;
}
let selection = if extend {
selection.clone().push(Range::new(start, end))
} else {
Selection::single(start, end)
};
doc.set_selection(view.id, selection);
align_view(doc, view, Align::Center);
};
}
// TODO: use one function for search vs extend
fn search(cx: &mut Context) {
let (_, doc) = current!(cx.editor);
// TODO: could probably share with select_on_matches?
// HAXX: sadly we can't avoid allocating a single string for the whole buffer since we can't
// feed chunks into the regex yet
let contents = doc.text().slice(..).to_string();
let prompt = ui::regex_prompt(
cx,
"search:".to_string(),
move |view, doc, registers, regex| {
search_impl(doc, view, &contents, &regex, false);
// TODO: only store on enter (accept), not update
registers.write('/', vec![regex.as_str().to_string()]);
},
);
cx.push_layer(Box::new(prompt));
}
fn search_next_impl(cx: &mut Context, extend: bool) {
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
if let Some(query) = registers.read('/') {
let query = query.first().unwrap();
let contents = doc.text().slice(..).to_string();
let regex = Regex::new(query).unwrap();
search_impl(doc, view, &contents, &regex, extend);
}
}
fn search_next(cx: &mut Context) {
search_next_impl(cx, false);
}
fn extend_search_next(cx: &mut Context) {
search_next_impl(cx, true);
}
fn search_selection(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let contents = doc.text().slice(..);
let query = doc.selection(view.id).primary().fragment(contents);
let regex = regex::escape(&query);
cx.editor.registers.write('/', vec![regex]);
search_next(cx);
}
fn extend_line(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text();
let range = doc.selection(view.id).primary();
let (start_line, end_line) = range.line_range(text.slice(..));
let start = text.line_to_char(start_line);
let mut end = text.line_to_char((end_line + count).min(text.len_lines()));
if range.from() == start && range.to() == end {
end = text.line_to_char((end_line + count + 1).min(text.len_lines()));
}
doc.set_selection(view.id, Selection::single(start, end));
}
fn extend_to_line_bounds(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
doc.set_selection(
view.id,
doc.selection(view.id).clone().transform(|range| {
let text = doc.text();
let (start_line, end_line) = range.line_range(text.slice(..));
let start = text.line_to_char(start_line);
let end = text.line_to_char((end_line + 1).min(text.len_lines()));
if range.anchor <= range.head {
Range::new(start, end)
} else {
Range::new(end, start)
}
}),
);
}
fn delete_selection_impl(reg: &mut Register, doc: &mut Document, view_id: ViewId) {
let text = doc.text().slice(..);
let selection = doc.selection(view_id);
// first yank the selection
let values: Vec<String> = selection.fragments(text).map(Cow::into_owned).collect();
reg.write(values);
// then delete
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
(range.from(), range.to(), None)
});
doc.apply(&transaction, view_id);
}
fn delete_selection(cx: &mut Context) {
let reg_name = cx.selected_register.name();
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
let reg = registers.get_mut(reg_name);
delete_selection_impl(reg, doc, view.id);
doc.append_changes_to_history(view.id);
// exit select mode, if currently in select mode
exit_select_mode(cx);
}
fn change_selection(cx: &mut Context) {
let reg_name = cx.selected_register.name();
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
let reg = registers.get_mut(reg_name);
delete_selection_impl(reg, doc, view.id);
enter_insert_mode(doc);
}
fn collapse_selection(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
let pos = range.cursor(text);
Range::new(pos, pos)
});
doc.set_selection(view.id, selection);
}
fn flip_selections(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| Range::new(range.head, range.anchor));
doc.set_selection(view.id, selection);
}
fn enter_insert_mode(doc: &mut Document) {
doc.mode = Mode::Insert;
}
// inserts at the start of each selection
fn insert_mode(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
enter_insert_mode(doc);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| Range::new(range.to(), range.from()));
doc.set_selection(view.id, selection);
}
// inserts at the end of each selection
fn append_mode(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
enter_insert_mode(doc);
doc.restore_cursor = true;
let text = doc.text().slice(..);
// Make sure there's room at the end of the document if the last
// selection butts up against it.
let end = text.len_chars();
let last_range = doc.selection(view.id).iter().last().unwrap();
if !last_range.is_empty() && last_range.head == end {
let transaction = Transaction::change(
doc.text(),
std::array::IntoIter::new([(end, end, Some(doc.line_ending.as_str().into()))]),
);
doc.apply(&transaction, view.id);
}
let selection = doc.selection(view.id).clone().transform(|range| {
Range::new(
range.from(),
graphemes::next_grapheme_boundary(doc.text().slice(..), range.to()),
)
});
doc.set_selection(view.id, selection);
}
mod cmd {
use super::*;
use std::collections::HashMap;
use helix_view::editor::Action;
use ui::completers::{self, Completer};
#[derive(Clone)]
pub struct TypableCommand {
pub name: &'static str,
pub alias: Option<&'static str>,
pub doc: &'static str,
// params, flags, helper, completer
pub fun: fn(&mut compositor::Context, &[&str], PromptEvent) -> anyhow::Result<()>,
pub completer: Option<Completer>,
}
fn quit(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
// last view and we have unsaved changes
if cx.editor.tree.views().count() == 1 {
buffers_remaining_impl(cx.editor)?
}
cx.editor
.close(view!(cx.editor).id, /* close_buffer */ false);
Ok(())
}
fn force_quit(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
cx.editor
.close(view!(cx.editor).id, /* close_buffer */ false);
Ok(())
}
fn open(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let path = args.get(0).context("wrong argument count")?;
let _ = cx.editor.open(path.into(), Action::Replace)?;
Ok(())
}
fn write_impl<P: AsRef<Path>>(
cx: &mut compositor::Context,
path: Option<P>,
) -> anyhow::Result<()> {
let jobs = &mut cx.jobs;
let (_, doc) = current!(cx.editor);
if let Some(path) = path {
doc.set_path(path.as_ref()).context("invalid filepath")?;
}
if doc.path().is_none() {
bail!("cannot write a buffer without a filename");
}
let fmt = doc.auto_format().map(|fmt| {
let shared = fmt.shared();
let callback = make_format_callback(
doc.id(),
doc.version(),
Modified::SetUnmodified,
shared.clone(),
);
jobs.callback(callback);
shared
});
let future = doc.format_and_save(fmt);
cx.jobs.add(Job::new(future).wait_before_exiting());
Ok(())
}
fn write(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
write_impl(cx, args.first())
}
fn new_file(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
cx.editor.new_file(Action::Replace);
Ok(())
}
fn format(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (_, doc) = current!(cx.editor);
if let Some(format) = doc.format() {
let callback =
make_format_callback(doc.id(), doc.version(), Modified::LeaveModified, format);
cx.jobs.callback(callback);
}
Ok(())
}
fn set_indent_style(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
use IndentStyle::*;
// If no argument, report current indent style.
if args.is_empty() {
let style = current!(cx.editor).1.indent_style;
cx.editor.set_status(match style {
Tabs => "tabs".into(),
Spaces(1) => "1 space".into(),
Spaces(n) if (2..=8).contains(&n) => format!("{} spaces", n),
_ => "error".into(), // Shouldn't happen.
});
return Ok(());
}
// Attempt to parse argument as an indent style.
let style = match args.get(0) {
Some(arg) if "tabs".starts_with(&arg.to_lowercase()) => Some(Tabs),
Some(&"0") => Some(Tabs),
Some(arg) => arg
.parse::<u8>()
.ok()
.filter(|n| (1..=8).contains(n))
.map(Spaces),
_ => None,
};
let style = style.context("invalid indent style")?;
let doc = doc_mut!(cx.editor);
doc.indent_style = style;
Ok(())
}
/// Sets or reports the current document's line ending setting.
fn set_line_ending(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
use LineEnding::*;
// If no argument, report current line ending setting.
if args.is_empty() {
let line_ending = current!(cx.editor).1.line_ending;
cx.editor.set_status(match line_ending {
Crlf => "crlf".into(),
LF => "line feed".into(),
FF => "form feed".into(),
CR => "carriage return".into(),
Nel => "next line".into(),
// These should never be a document's default line ending.
VT | LS | PS => "error".into(),
});
return Ok(());
}
let arg = args
.get(0)
.context("argument missing")?
.to_ascii_lowercase();
// Attempt to parse argument as a line ending.
let line_ending = match arg {
// We check for CR first because it shares a common prefix with CRLF.
arg if arg.starts_with("cr") => CR,
arg if arg.starts_with("crlf") => Crlf,
arg if arg.starts_with("lf") => LF,
arg if arg.starts_with("ff") => FF,
arg if arg.starts_with("nel") => Nel,
_ => bail!("invalid line ending"),
};
doc_mut!(cx.editor).line_ending = line_ending;
Ok(())
}
fn earlier(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let uk = args
.join(" ")
.parse::<helix_core::history::UndoKind>()
.map_err(|s| anyhow!(s))?;
let (view, doc) = current!(cx.editor);
doc.earlier(view.id, uk);
Ok(())
}
fn later(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let uk = args
.join(" ")
.parse::<helix_core::history::UndoKind>()
.map_err(|s| anyhow!(s))?;
let (view, doc) = current!(cx.editor);
doc.later(view.id, uk);
Ok(())
}
fn write_quit(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
write_impl(cx, args.first())?;
quit(cx, &[], event)
}
fn force_write_quit(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
write_impl(cx, args.first())?;
force_quit(cx, &[], event)
}
/// Results an error if there are modified buffers remaining and sets editor error,
/// otherwise returns `Ok(())`
fn buffers_remaining_impl(editor: &mut Editor) -> anyhow::Result<()> {
let modified: Vec<_> = editor
.documents()
.filter(|doc| doc.is_modified())
.map(|doc| {
doc.relative_path()
.map(|path| path.to_string_lossy().to_string())
.unwrap_or_else(|| "[scratch]".into())
})
.collect();
if !modified.is_empty() {
bail!(
"{} unsaved buffer(s) remaining: {:?}",
modified.len(),
modified
);
}
Ok(())
}
fn write_all_impl(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
quit: bool,
force: bool,
) -> anyhow::Result<()> {
let mut errors = String::new();
// save all documents
for (_, doc) in &mut cx.editor.documents {
if doc.path().is_none() {
errors.push_str("cannot write a buffer without a filename\n");
continue;
}
// TODO: handle error.
let handle = doc.save();
cx.jobs.add(Job::new(handle).wait_before_exiting());
}
if quit {
if !force {
buffers_remaining_impl(cx.editor)?;
}
// close all views
let views: Vec<_> = cx.editor.tree.views().map(|(view, _)| view.id).collect();
for view_id in views {
cx.editor.close(view_id, false);
}
}
bail!(errors)
}
fn write_all(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
write_all_impl(cx, args, event, false, false)
}
fn write_all_quit(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
write_all_impl(cx, args, event, true, false)
}
fn force_write_all_quit(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
write_all_impl(cx, args, event, true, true)
}
fn quit_all_impl(
editor: &mut Editor,
_args: &[&str],
_event: PromptEvent,
force: bool,
) -> anyhow::Result<()> {
if !force {
buffers_remaining_impl(editor)?;
}
// close all views
let views: Vec<_> = editor.tree.views().map(|(view, _)| view.id).collect();
for view_id in views {
editor.close(view_id, false);
}
Ok(())
}
fn quit_all(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
quit_all_impl(&mut cx.editor, args, event, false)
}
fn force_quit_all(
cx: &mut compositor::Context,
args: &[&str],
event: PromptEvent,
) -> anyhow::Result<()> {
quit_all_impl(&mut cx.editor, args, event, true)
}
fn theme(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let theme = args.first().context("theme not provided")?;
cx.editor.set_theme_from_name(theme)
}
fn yank_main_selection_to_clipboard(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
yank_main_selection_to_clipboard_impl(&mut cx.editor, ClipboardType::Clipboard)
}
fn yank_joined_to_clipboard(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (_, doc) = current!(cx.editor);
let separator = args
.first()
.copied()
.unwrap_or_else(|| doc.line_ending.as_str());
yank_joined_to_clipboard_impl(&mut cx.editor, separator, ClipboardType::Clipboard)
}
fn yank_main_selection_to_primary_clipboard(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
yank_main_selection_to_clipboard_impl(&mut cx.editor, ClipboardType::Selection)
}
fn yank_joined_to_primary_clipboard(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (_, doc) = current!(cx.editor);
let separator = args
.first()
.copied()
.unwrap_or_else(|| doc.line_ending.as_str());
yank_joined_to_clipboard_impl(&mut cx.editor, separator, ClipboardType::Selection)
}
fn paste_clipboard_after(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Clipboard)
}
fn paste_clipboard_before(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Clipboard)
}
fn paste_primary_clipboard_after(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Selection)
}
fn paste_primary_clipboard_before(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Selection)
}
fn replace_selections_with_clipboard_impl(
cx: &mut compositor::Context,
clipboard_type: ClipboardType,
) -> anyhow::Result<()> {
let (view, doc) = current!(cx.editor);
match cx.editor.clipboard_provider.get_contents(clipboard_type) {
Ok(contents) => {
let selection = doc.selection(view.id);
let transaction =
Transaction::change_by_selection(doc.text(), selection, |range| {
(range.from(), range.to(), Some(contents.as_str().into()))
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
Ok(())
}
Err(e) => Err(e.context("Couldn't get system clipboard contents")),
}
}
fn replace_selections_with_clipboard(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
replace_selections_with_clipboard_impl(cx, ClipboardType::Clipboard)
}
fn replace_selections_with_primary_clipboard(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
replace_selections_with_clipboard_impl(cx, ClipboardType::Selection)
}
fn show_clipboard_provider(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
cx.editor
.set_status(cx.editor.clipboard_provider.name().to_string());
Ok(())
}
fn change_current_directory(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let dir = args.first().context("target directory not provided")?;
if let Err(e) = std::env::set_current_dir(dir) {
bail!("Couldn't change the current working directory: {}", e);
}
let cwd = std::env::current_dir().context("Couldn't get the new working directory")?;
cx.editor.set_status(format!(
"Current working directory is now {}",
cwd.display()
));
Ok(())
}
fn show_current_directory(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let cwd = std::env::current_dir().context("Couldn't get the new working directory")?;
cx.editor
.set_status(format!("Current working directory is {}", cwd.display()));
Ok(())
}
/// Sets the [`Document`]'s encoding..
fn set_encoding(
cx: &mut compositor::Context,
args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (_, doc) = current!(cx.editor);
if let Some(label) = args.first() {
doc.set_encoding(label)
} else {
let encoding = doc.encoding().name().to_string();
cx.editor.set_status(encoding);
Ok(())
}
}
/// Reload the [`Document`] from its source file.
fn reload(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (view, doc) = current!(cx.editor);
doc.reload(view.id)
}
fn tree_sitter_scopes(
cx: &mut compositor::Context,
_args: &[&str],
_event: PromptEvent,
) -> anyhow::Result<()> {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let pos = doc.selection(view.id).primary().cursor(text);
let scopes = indent::get_scopes(doc.syntax(), text, pos);
cx.editor.set_status(format!("scopes: {:?}", &scopes));
Ok(())
}
pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[
TypableCommand {
name: "quit",
alias: Some("q"),
doc: "Close the current view.",
fun: quit,
completer: None,
},
TypableCommand {
name: "quit!",
alias: Some("q!"),
doc: "Close the current view.",
fun: force_quit,
completer: None,
},
TypableCommand {
name: "open",
alias: Some("o"),
doc: "Open a file from disk into the current view.",
fun: open,
completer: Some(completers::filename),
},
TypableCommand {
name: "write",
alias: Some("w"),
doc: "Write changes to disk. Accepts an optional path (:write some/path.txt)",
fun: write,
completer: Some(completers::filename),
},
TypableCommand {
name: "new",
alias: Some("n"),
doc: "Create a new scratch buffer.",
fun: new_file,
completer: Some(completers::filename),
},
TypableCommand {
name: "format",
alias: Some("fmt"),
doc: "Format the file using a formatter.",
fun: format,
completer: None,
},
TypableCommand {
name: "indent-style",
alias: None,
doc: "Set the indentation style for editing. ('t' for tabs or 1-8 for number of spaces.)",
fun: set_indent_style,
completer: None,
},
TypableCommand {
name: "line-ending",
alias: None,
doc: "Set the document's default line ending. Options: crlf, lf, cr, ff, nel.",
fun: set_line_ending,
completer: None,
},
TypableCommand {
name: "earlier",
alias: Some("ear"),
doc: "Jump back to an earlier point in edit history. Accepts a number of steps or a time span.",
fun: earlier,
completer: None,
},
TypableCommand {
name: "later",
alias: Some("lat"),
doc: "Jump to a later point in edit history. Accepts a number of steps or a time span.",
fun: later,
completer: None,
},
TypableCommand {
name: "write-quit",
alias: Some("wq"),
doc: "Writes changes to disk and closes the current view. Accepts an optional path (:wq some/path.txt)",
fun: write_quit,
completer: Some(completers::filename),
},
TypableCommand {
name: "write-quit!",
alias: Some("wq!"),
doc: "Writes changes to disk and closes the current view forcefully. Accepts an optional path (:wq! some/path.txt)",
fun: force_write_quit,
completer: Some(completers::filename),
},
TypableCommand {
name: "write-all",
alias: Some("wa"),
doc: "Writes changes from all views to disk.",
fun: write_all,
completer: None,
},
TypableCommand {
name: "write-quit-all",
alias: Some("wqa"),
doc: "Writes changes from all views to disk and close all views.",
fun: write_all_quit,
completer: None,
},
TypableCommand {
name: "write-quit-all!",
alias: Some("wqa!"),
doc: "Writes changes from all views to disk and close all views forcefully (ignoring unsaved changes).",
fun: force_write_all_quit,
completer: None,
},
TypableCommand {
name: "quit-all",
alias: Some("qa"),
doc: "Close all views.",
fun: quit_all,
completer: None,
},
TypableCommand {
name: "quit-all!",
alias: Some("qa!"),
doc: "Close all views forcefully (ignoring unsaved changes).",
fun: force_quit_all,
completer: None,
},
TypableCommand {
name: "theme",
alias: None,
doc: "Change the theme of current view. Requires theme name as argument (:theme <name>)",
fun: theme,
completer: Some(completers::theme),
},
TypableCommand {
name: "clipboard-yank",
alias: None,
doc: "Yank main selection into system clipboard.",
fun: yank_main_selection_to_clipboard,
completer: None,
},
TypableCommand {
name: "clipboard-yank-join",
alias: None,
doc: "Yank joined selections into system clipboard. A separator can be provided as first argument. Default value is newline.", // FIXME: current UI can't display long doc.
fun: yank_joined_to_clipboard,
completer: None,
},
TypableCommand {
name: "primary-clipboard-yank",
alias: None,
doc: "Yank main selection into system primary clipboard.",
fun: yank_main_selection_to_primary_clipboard,
completer: None,
},
TypableCommand {
name: "primary-clipboard-yank-join",
alias: None,
doc: "Yank joined selections into system primary clipboard. A separator can be provided as first argument. Default value is newline.", // FIXME: current UI can't display long doc.
fun: yank_joined_to_primary_clipboard,
completer: None,
},
TypableCommand {
name: "clipboard-paste-after",
alias: None,
doc: "Paste system clipboard after selections.",
fun: paste_clipboard_after,
completer: None,
},
TypableCommand {
name: "clipboard-paste-before",
alias: None,
doc: "Paste system clipboard before selections.",
fun: paste_clipboard_before,
completer: None,
},
TypableCommand {
name: "clipboard-paste-replace",
alias: None,
doc: "Replace selections with content of system clipboard.",
fun: replace_selections_with_clipboard,
completer: None,
},
TypableCommand {
name: "primary-clipboard-paste-after",
alias: None,
doc: "Paste primary clipboard after selections.",
fun: paste_primary_clipboard_after,
completer: None,
},
TypableCommand {
name: "primary-clipboard-paste-before",
alias: None,
doc: "Paste primary clipboard before selections.",
fun: paste_primary_clipboard_before,
completer: None,
},
TypableCommand {
name: "primary-clipboard-paste-replace",
alias: None,
doc: "Replace selections with content of system primary clipboard.",
fun: replace_selections_with_primary_clipboard,
completer: None,
},
TypableCommand {
name: "show-clipboard-provider",
alias: None,
doc: "Show clipboard provider name in status bar.",
fun: show_clipboard_provider,
completer: None,
},
TypableCommand {
name: "change-current-directory",
alias: Some("cd"),
doc: "Change the current working directory (:cd <dir>).",
fun: change_current_directory,
completer: Some(completers::directory),
},
TypableCommand {
name: "show-directory",
alias: Some("pwd"),
doc: "Show the current working directory.",
fun: show_current_directory,
completer: None,
},
TypableCommand {
name: "encoding",
alias: None,
doc: "Set encoding based on `https://encoding.spec.whatwg.org`",
fun: set_encoding,
completer: None,
},
TypableCommand {
name: "reload",
alias: None,
doc: "Discard changes and reload from the source file.",
fun: reload,
completer: None,
},
TypableCommand {
name: "tree-sitter-scopes",
alias: None,
doc: "Display tree sitter scopes, primarily for theming and development.",
fun: tree_sitter_scopes,
completer: None,
}
];
pub static COMMANDS: Lazy<HashMap<&'static str, &'static TypableCommand>> = Lazy::new(|| {
let mut map = HashMap::new();
for cmd in TYPABLE_COMMAND_LIST {
map.insert(cmd.name, cmd);
if let Some(alias) = cmd.alias {
map.insert(alias, cmd);
}
}
map
});
}
fn command_mode(cx: &mut Context) {
let mut prompt = Prompt::new(
":".to_owned(),
Some(':'),
|input: &str| {
// we use .this over split_whitespace() because we care about empty segments
let parts = input.split(' ').collect::<Vec<&str>>();
// simple heuristic: if there's no just one part, complete command name.
// if there's a space, per command completion kicks in.
if parts.len() <= 1 {
let end = 0..;
cmd::TYPABLE_COMMAND_LIST
.iter()
.filter(|command| command.name.contains(input))
.map(|command| (end.clone(), Cow::Borrowed(command.name)))
.collect()
} else {
let part = parts.last().unwrap();
if let Some(cmd::TypableCommand {
completer: Some(completer),
..
}) = cmd::COMMANDS.get(parts[0])
{
completer(part)
.into_iter()
.map(|(range, file)| {
// offset ranges to input
let offset = input.len() - part.len();
let range = (range.start + offset)..;
(range, file)
})
.collect()
} else {
Vec::new()
}
}
}, // completion
move |cx: &mut compositor::Context, input: &str, event: PromptEvent| {
if event != PromptEvent::Validate {
return;
}
let parts = input.split_whitespace().collect::<Vec<&str>>();
if parts.is_empty() {
return;
}
if let Some(cmd) = cmd::COMMANDS.get(parts[0]) {
if let Err(e) = (cmd.fun)(cx, &parts[1..], event) {
cx.editor.set_error(format!("{}", e));
}
} else {
cx.editor
.set_error(format!("no such command: '{}'", parts[0]));
};
},
);
prompt.doc_fn = Box::new(|input: &str| {
let part = input.split(' ').next().unwrap_or_default();
if let Some(cmd::TypableCommand { doc, .. }) = cmd::COMMANDS.get(part) {
return Some(doc);
}
None
});
cx.push_layer(Box::new(prompt));
}
fn file_picker(cx: &mut Context) {
let root = find_root(None).unwrap_or_else(|| PathBuf::from("./"));
let picker = ui::file_picker(root);
cx.push_layer(Box::new(picker));
}
fn buffer_picker(cx: &mut Context) {
let current = view!(cx.editor).doc;
let picker = FilePicker::new(
cx.editor
.documents
.iter()
.map(|(id, doc)| (id, doc.relative_path()))
.collect(),
move |(id, path): &(DocumentId, Option<PathBuf>)| {
// format_fn
match path.as_ref().and_then(|path| path.to_str()) {
Some(path) => {
if *id == current {
format!("{} (*)", path).into()
} else {
path.into()
}
}
None => "[scratch buffer]".into(),
}
},
|editor: &mut Editor, (id, _path): &(DocumentId, Option<PathBuf>), _action| {
editor.switch(*id, Action::Replace);
},
|editor, (id, path)| {
let doc = &editor.documents.get(*id)?;
let &view_id = doc.selections().keys().next()?;
let line = doc
.selection(view_id)
.primary()
.cursor_line(doc.text().slice(..));
Some((path.clone()?, Some(line)))
},
);
cx.push_layer(Box::new(picker));
}
fn symbol_picker(cx: &mut Context) {
fn nested_to_flat(
list: &mut Vec<lsp::SymbolInformation>,
file: &lsp::TextDocumentIdentifier,
symbol: lsp::DocumentSymbol,
) {
#[allow(deprecated)]
list.push(lsp::SymbolInformation {
name: symbol.name,
kind: symbol.kind,
tags: symbol.tags,
deprecated: symbol.deprecated,
location: lsp::Location::new(file.uri.clone(), symbol.selection_range),
container_name: None,
});
for child in symbol.children.into_iter().flatten() {
nested_to_flat(list, file, child);
}
}
let (_, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let future = language_server.document_symbols(doc.identifier());
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::DocumentSymbolResponse>| {
if let Some(symbols) = response {
// lsp has two ways to represent symbols (flat/nested)
// convert the nested variant to flat, so that we have a homogeneous list
let symbols = match symbols {
lsp::DocumentSymbolResponse::Flat(symbols) => symbols,
lsp::DocumentSymbolResponse::Nested(symbols) => {
let (_view, doc) = current!(editor);
let mut flat_symbols = Vec::new();
for symbol in symbols {
nested_to_flat(&mut flat_symbols, &doc.identifier(), symbol)
}
flat_symbols
}
};
let picker = FilePicker::new(
symbols,
|symbol| (&symbol.name).into(),
move |editor: &mut Editor, symbol, _action| {
push_jump(editor);
let (view, doc) = current!(editor);
if let Some(range) =
lsp_range_to_range(doc.text(), symbol.location.range, offset_encoding)
{
doc.set_selection(view.id, Selection::single(range.anchor, range.head));
align_view(doc, view, Align::Center);
}
},
move |_editor, symbol| {
let path = symbol.location.uri.to_file_path().unwrap();
let line = Some(symbol.location.range.start.line as usize);
Some((path, line))
},
);
compositor.push(Box::new(picker))
}
},
)
}
pub fn code_action(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let range = range_to_lsp_range(
doc.text(),
doc.selection(view.id).primary(),
language_server.offset_encoding(),
);
let future = language_server.code_actions(doc.identifier(), range);
let offset_encoding = language_server.offset_encoding();
cx.callback(
future,
move |_editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::CodeActionResponse>| {
if let Some(actions) = response {
let picker = Picker::new(
true,
actions,
|action| match action {
lsp::CodeActionOrCommand::CodeAction(action) => {
action.title.as_str().into()
}
lsp::CodeActionOrCommand::Command(command) => command.title.as_str().into(),
},
move |editor, code_action, _action| match code_action {
lsp::CodeActionOrCommand::Command(command) => {
log::debug!("code action command: {:?}", command);
editor.set_error(String::from("Handling code action command is not implemented yet, see https://github.com/helix-editor/helix/issues/183"));
}
lsp::CodeActionOrCommand::CodeAction(code_action) => {
log::debug!("code action: {:?}", code_action);
if let Some(ref workspace_edit) = code_action.edit {
apply_workspace_edit(editor, offset_encoding, workspace_edit)
}
}
},
);
compositor.push(Box::new(picker))
}
},
)
}
fn apply_workspace_edit(
editor: &mut Editor,
offset_encoding: OffsetEncoding,
workspace_edit: &lsp::WorkspaceEdit,
) {
if let Some(ref changes) = workspace_edit.changes {
log::debug!("workspace changes: {:?}", changes);
editor.set_error(String::from("Handling workspace changesis not implemented yet, see https://github.com/helix-editor/helix/issues/183"));
return;
// Not sure if it works properly, it'll be safer to just panic here to avoid breaking some parts of code on which code actions will be used
// TODO: find some example that uses workspace changes, and test it
// for (url, edits) in changes.iter() {
// let file_path = url.origin().ascii_serialization();
// let file_path = std::path::PathBuf::from(file_path);
// let file = std::fs::File::open(file_path).unwrap();
// let mut text = Rope::from_reader(file).unwrap();
// let transaction = edits_to_changes(&text, edits);
// transaction.apply(&mut text);
// }
}
if let Some(ref document_changes) = workspace_edit.document_changes {
match document_changes {
lsp::DocumentChanges::Edits(document_edits) => {
for document_edit in document_edits {
let (view, doc) = current!(editor);
assert_eq!(doc.url().unwrap(), document_edit.text_document.uri);
let edits = document_edit
.edits
.iter()
.map(|edit| match edit {
lsp::OneOf::Left(text_edit) => text_edit,
lsp::OneOf::Right(annotated_text_edit) => {
&annotated_text_edit.text_edit
}
})
.cloned()
.collect();
let transaction = helix_lsp::util::generate_transaction_from_edits(
doc.text(),
edits,
offset_encoding,
);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
}
lsp::DocumentChanges::Operations(operations) => {
log::debug!("document changes - operations: {:?}", operations);
editor.set_error(String::from("Handling document operations is not implemented yet, see https://github.com/helix-editor/helix/issues/183"));
}
}
}
}
fn last_picker(cx: &mut Context) {
// TODO: last picker does not seem to work well with buffer_picker
cx.callback = Some(Box::new(|compositor: &mut Compositor| {
if let Some(picker) = compositor.last_picker.take() {
compositor.push(picker);
}
// XXX: figure out how to show error when no last picker lifetime
// cx.editor.set_error("no last picker".to_owned())
}));
}
// I inserts at the first nonwhitespace character of each line with a selection
fn prepend_to_line(cx: &mut Context) {
goto_first_nonwhitespace(cx);
let doc = doc_mut!(cx.editor);
enter_insert_mode(doc);
}
// A inserts at the end of each line with a selection
fn append_to_line(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
enter_insert_mode(doc);
let selection = doc.selection(view.id).clone().transform(|range| {
let text = doc.text().slice(..);
let line = range.cursor_line(text);
let pos = line_end_char_index(&text, line);
Range::new(pos, pos)
});
doc.set_selection(view.id, selection);
}
/// Sometimes when applying formatting changes we want to mark the buffer as unmodified, for
/// example because we just applied the same changes while saving.
enum Modified {
SetUnmodified,
LeaveModified,
}
// Creates an LspCallback that waits for formatting changes to be computed. When they're done,
// it applies them, but only if the doc hasn't changed.
//
// TODO: provide some way to cancel this, probably as part of a more general job cancellation
// scheme
async fn make_format_callback(
doc_id: DocumentId,
doc_version: i32,
modified: Modified,
format: impl Future<Output = helix_lsp::util::LspFormatting> + Send + 'static,
) -> anyhow::Result<job::Callback> {
let format = format.await;
let call: job::Callback = Box::new(move |editor: &mut Editor, _compositor: &mut Compositor| {
let view_id = view!(editor).id;
if let Some(doc) = editor.document_mut(doc_id) {
if doc.version() == doc_version {
doc.apply(&Transaction::from(format), view_id);
doc.append_changes_to_history(view_id);
if let Modified::SetUnmodified = modified {
doc.reset_modified();
}
} else {
log::info!("discarded formatting changes because the document changed");
}
}
});
Ok(call)
}
enum Open {
Below,
Above,
}
fn open(cx: &mut Context, open: Open) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
enter_insert_mode(doc);
let text = doc.text().slice(..);
let contents = doc.text();
let selection = doc.selection(view.id);
let mut ranges = SmallVec::with_capacity(selection.len());
let mut offs = 0;
let mut transaction = Transaction::change_by_selection(contents, selection, |range| {
let line = range.cursor_line(text);
let line = match open {
// adjust position to the end of the line (next line - 1)
Open::Below => line + 1,
// adjust position to the end of the previous line (current line - 1)
Open::Above => line,
};
// Index to insert newlines after, as well as the char width
// to use to compensate for those inserted newlines.
let (line_end_index, line_end_offset_width) = if line == 0 {
(0, 0)
} else {
(
line_end_char_index(&doc.text().slice(..), line.saturating_sub(1)),
doc.line_ending.len_chars(),
)
};
// TODO: share logic with insert_newline for indentation
let indent_level = indent::suggested_indent_for_pos(
doc.language_config(),
doc.syntax(),
text,
line_end_index,
true,
);
let indent = doc.indent_unit().repeat(indent_level);
let indent_len = indent.len();
let mut text = String::with_capacity(1 + indent_len);
text.push_str(doc.line_ending.as_str());
text.push_str(&indent);
let text = text.repeat(count);
// calculate new selection ranges
let pos = offs + line_end_index + line_end_offset_width;
for i in 0..count {
// pos -> beginning of reference line,
// + (i * (1+indent_len)) -> beginning of i'th line from pos
// + indent_len -> -> indent for i'th line
ranges.push(Range::point(pos + (i * (1 + indent_len)) + indent_len));
}
offs += text.chars().count();
(line_end_index, line_end_index, Some(text.into()))
});
transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index()));
doc.apply(&transaction, view.id);
}
// o inserts a new line after each line with a selection
fn open_below(cx: &mut Context) {
open(cx, Open::Below)
}
// O inserts a new line before each line with a selection
fn open_above(cx: &mut Context) {
open(cx, Open::Above)
}
fn normal_mode(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
doc.mode = Mode::Normal;
doc.append_changes_to_history(view.id);
// if leaving append mode, move cursor back by 1
if doc.restore_cursor {
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
Range::new(
range.from(),
graphemes::prev_grapheme_boundary(text, range.to()),
)
});
doc.set_selection(view.id, selection);
doc.restore_cursor = false;
}
}
// Store a jump on the jumplist.
fn push_jump(editor: &mut Editor) {
let (view, doc) = current!(editor);
let jump = (doc.id(), doc.selection(view.id).clone());
view.jumps.push(jump);
}
fn goto_line(cx: &mut Context) {
if let Some(count) = cx.count {
push_jump(cx.editor);
let (view, doc) = current!(cx.editor);
let max_line = if doc.text().line(doc.text().len_lines() - 1).len_chars() == 0 {
// If the last line is blank, don't jump to it.
doc.text().len_lines().saturating_sub(2)
} else {
doc.text().len_lines() - 1
};
let line_idx = std::cmp::min(count.get() - 1, max_line);
let pos = doc.text().line_to_char(line_idx);
doc.set_selection(view.id, Selection::point(pos));
}
}
fn goto_last_line(cx: &mut Context) {
push_jump(cx.editor);
let (view, doc) = current!(cx.editor);
let line_idx = if doc.text().line(doc.text().len_lines() - 1).len_chars() == 0 {
// If the last line is blank, don't jump to it.
doc.text().len_lines().saturating_sub(2)
} else {
doc.text().len_lines() - 1
};
let pos = doc.text().line_to_char(line_idx);
doc.set_selection(view.id, Selection::point(pos));
}
fn goto_last_accessed_file(cx: &mut Context) {
let alternate_file = view!(cx.editor).last_accessed_doc;
if let Some(alt) = alternate_file {
cx.editor.switch(alt, Action::Replace);
} else {
cx.editor.set_error("no last accessed buffer".to_owned())
}
}
fn select_mode(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
// Make sure end-of-document selections are also 1-width.
// (With the exception of being in an empty document, of course.)
let selection = doc.selection(view.id).clone().transform(|range| {
if range.is_empty() && range.head == text.len_chars() {
Range::new(
graphemes::prev_grapheme_boundary(text, range.anchor),
range.head,
)
} else {
range
}
});
doc.set_selection(view.id, selection);
doc_mut!(cx.editor).mode = Mode::Select;
}
fn exit_select_mode(cx: &mut Context) {
let doc = doc_mut!(cx.editor);
if doc.mode == Mode::Select {
doc.mode = Mode::Normal;
}
}
fn goto_impl(
editor: &mut Editor,
compositor: &mut Compositor,
locations: Vec<lsp::Location>,
offset_encoding: OffsetEncoding,
) {
push_jump(editor);
fn jump_to(
editor: &mut Editor,
location: &lsp::Location,
offset_encoding: OffsetEncoding,
action: Action,
) {
let path = location
.uri
.to_file_path()
.expect("unable to convert URI to filepath");
let _id = editor.open(path, action).expect("editor.open failed");
let (view, doc) = current!(editor);
let definition_pos = location.range.start;
// TODO: convert inside server
let new_pos =
if let Some(new_pos) = lsp_pos_to_pos(doc.text(), definition_pos, offset_encoding) {
new_pos
} else {
return;
};
doc.set_selection(view.id, Selection::point(new_pos));
align_view(doc, view, Align::Center);
}
let cwdir = std::env::current_dir().expect("couldn't determine current directory");
match locations.as_slice() {
[location] => {
jump_to(editor, location, offset_encoding, Action::Replace);
}
[] => {
editor.set_error("No definition found.".to_string());
}
_locations => {
let picker = FilePicker::new(
locations,
move |location| {
let file: Cow<'_, str> = (location.uri.scheme() == "file")
.then(|| {
location
.uri
.to_file_path()
.map(|path| {
// strip root prefix
path.strip_prefix(&cwdir)
.map(|path| path.to_path_buf())
.unwrap_or(path)
})
.ok()
.and_then(|path| path.to_str().map(|path| path.to_owned().into()))
})
.flatten()
.unwrap_or_else(|| location.uri.as_str().into());
let line = location.range.start.line;
format!("{}:{}", file, line).into()
},
move |editor: &mut Editor, location, action| {
jump_to(editor, location, offset_encoding, action)
},
|_editor, location| {
let path = location.uri.to_file_path().unwrap();
let line = Some(location.range.start.line as usize);
Some((path, line))
},
);
compositor.push(Box::new(picker));
}
}
}
fn goto_definition(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
offset_encoding,
);
let future = language_server.goto_definition(doc.identifier(), pos, None);
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::GotoDefinitionResponse>| {
let items = match response {
Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location],
Some(lsp::GotoDefinitionResponse::Array(locations)) => locations,
Some(lsp::GotoDefinitionResponse::Link(locations)) => locations
.into_iter()
.map(|location_link| lsp::Location {
uri: location_link.target_uri,
range: location_link.target_range,
})
.collect(),
None => Vec::new(),
};
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
fn goto_type_definition(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
offset_encoding,
);
let future = language_server.goto_type_definition(doc.identifier(), pos, None);
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::GotoDefinitionResponse>| {
let items = match response {
Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location],
Some(lsp::GotoDefinitionResponse::Array(locations)) => locations,
Some(lsp::GotoDefinitionResponse::Link(locations)) => locations
.into_iter()
.map(|location_link| lsp::Location {
uri: location_link.target_uri,
range: location_link.target_range,
})
.collect(),
None => Vec::new(),
};
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
fn goto_implementation(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
offset_encoding,
);
let future = language_server.goto_implementation(doc.identifier(), pos, None);
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::GotoDefinitionResponse>| {
let items = match response {
Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location],
Some(lsp::GotoDefinitionResponse::Array(locations)) => locations,
Some(lsp::GotoDefinitionResponse::Link(locations)) => locations
.into_iter()
.map(|location_link| lsp::Location {
uri: location_link.target_uri,
range: location_link.target_range,
})
.collect(),
None => Vec::new(),
};
goto_impl(editor, compositor, items, offset_encoding);
},
);
}
fn goto_reference(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
offset_encoding,
);
let future = language_server.goto_reference(doc.identifier(), pos, None);
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
items: Option<Vec<lsp::Location>>| {
goto_impl(
editor,
compositor,
items.unwrap_or_default(),
offset_encoding,
);
},
);
}
fn goto_pos(editor: &mut Editor, pos: usize) {
push_jump(editor);
let (view, doc) = current!(editor);
doc.set_selection(view.id, Selection::point(pos));
align_view(doc, view, Align::Center);
}
fn goto_first_diag(cx: &mut Context) {
let editor = &mut cx.editor;
let (_, doc) = current!(editor);
let diag = if let Some(diag) = doc.diagnostics().first() {
diag.range.start
} else {
return;
};
goto_pos(editor, diag);
}
fn goto_last_diag(cx: &mut Context) {
let editor = &mut cx.editor;
let (_, doc) = current!(editor);
let diag = if let Some(diag) = doc.diagnostics().last() {
diag.range.start
} else {
return;
};
goto_pos(editor, diag);
}
fn goto_next_diag(cx: &mut Context) {
let editor = &mut cx.editor;
let (view, doc) = current!(editor);
let cursor_pos = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let diag = if let Some(diag) = doc
.diagnostics()
.iter()
.map(|diag| diag.range.start)
.find(|&pos| pos > cursor_pos)
{
diag
} else if let Some(diag) = doc.diagnostics().first() {
diag.range.start
} else {
return;
};
goto_pos(editor, diag);
}
fn goto_prev_diag(cx: &mut Context) {
let editor = &mut cx.editor;
let (view, doc) = current!(editor);
let cursor_pos = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let diag = if let Some(diag) = doc
.diagnostics()
.iter()
.rev()
.map(|diag| diag.range.start)
.find(|&pos| pos < cursor_pos)
{
diag
} else if let Some(diag) = doc.diagnostics().last() {
diag.range.start
} else {
return;
};
goto_pos(editor, diag);
}
fn signature_help(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
language_server.offset_encoding(),
);
let future = language_server.text_document_signature_help(doc.identifier(), pos, None);
cx.callback(
future,
move |_editor: &mut Editor,
_compositor: &mut Compositor,
response: Option<lsp::SignatureHelp>| {
if let Some(signature_help) = response {
log::info!("{:?}", signature_help);
// signatures
// active_signature
// active_parameter
// render as:
// signature
// ----------
// doc
// with active param highlighted
}
},
);
}
// NOTE: Transactions in this module get appended to history when we switch back to normal mode.
pub mod insert {
use super::*;
pub type Hook = fn(&Rope, &Selection, char) -> Option<Transaction>;
pub type PostHook = fn(&mut Context, char);
fn completion(cx: &mut Context, ch: char) {
// if ch matches completion char, trigger completion
let doc = doc_mut!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let capabilities = language_server.capabilities();
if let lsp::ServerCapabilities {
completion_provider:
Some(lsp::CompletionOptions {
trigger_characters: Some(triggers),
..
}),
..
} = capabilities
{
// TODO: what if trigger is multiple chars long
let is_trigger = triggers.iter().any(|trigger| trigger.contains(ch));
if is_trigger {
super::completion(cx);
}
}
}
fn signature_help(cx: &mut Context, ch: char) {
// if ch matches signature_help char, trigger
let doc = doc_mut!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let capabilities = language_server.capabilities();
if let lsp::ServerCapabilities {
signature_help_provider:
Some(lsp::SignatureHelpOptions {
trigger_characters: Some(triggers),
// TODO: retrigger_characters
..
}),
..
} = capabilities
{
// TODO: what if trigger is multiple chars long
let is_trigger = triggers.iter().any(|trigger| trigger.contains(ch));
if is_trigger {
super::signature_help(cx);
}
}
// SignatureHelp {
// signatures: [
// SignatureInformation {
// label: "fn open(&mut self, path: PathBuf, action: Action) -> Result<DocumentId, Error>",
// documentation: None,
// parameters: Some(
// [ParameterInformation { label: Simple("path: PathBuf"), documentation: None },
// ParameterInformation { label: Simple("action: Action"), documentation: None }]
// ),
// active_parameter: Some(0)
// }
// ],
// active_signature: None, active_parameter: Some(0)
// }
}
// The default insert hook: simply insert the character
#[allow(clippy::unnecessary_wraps)] // need to use Option<> because of the Hook signature
fn insert(doc: &Rope, selection: &Selection, ch: char) -> Option<Transaction> {
let t = Tendril::from_char(ch);
let transaction = Transaction::insert(doc, selection, t);
Some(transaction)
}
use helix_core::auto_pairs;
const HOOKS: &[Hook] = &[auto_pairs::hook, insert];
const POST_HOOKS: &[PostHook] = &[completion, signature_help];
pub fn insert_char(cx: &mut Context, c: char) {
let (view, doc) = current!(cx.editor);
let text = doc.text();
let selection = doc.selection(view.id).clone().cursors(text.slice(..));
// run through insert hooks, stopping on the first one that returns Some(t)
for hook in HOOKS {
if let Some(transaction) = hook(text, &selection, c) {
doc.apply(&transaction, view.id);
break;
}
}
// TODO: need a post insert hook too for certain triggers (autocomplete, signature help, etc)
// this could also generically look at Transaction, but it's a bit annoying to look at
// Operation instead of Change.
for hook in POST_HOOKS {
hook(cx, c);
}
}
pub fn insert_tab(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
// TODO: round out to nearest indentation level (for example a line with 3 spaces should
// indent by one to reach 4 spaces).
let indent = Tendril::from(doc.indent_unit());
let transaction = Transaction::insert(
doc.text(),
&doc.selection(view.id).clone().cursors(doc.text().slice(..)),
indent,
);
doc.apply(&transaction, view.id);
}
pub fn insert_newline(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let contents = doc.text();
let selection = doc.selection(view.id).clone().cursors(text);
let mut ranges = SmallVec::with_capacity(selection.len());
// TODO: this is annoying, but we need to do it to properly calculate pos after edits
let mut offs = 0;
let mut transaction = Transaction::change_by_selection(contents, &selection, |range| {
let pos = range.head;
let prev = if pos == 0 {
' '
} else {
contents.char(pos - 1)
};
let curr = contents.get_char(pos).unwrap_or(' ');
// TODO: offset range.head by 1? when calculating?
let indent_level = indent::suggested_indent_for_pos(
doc.language_config(),
doc.syntax(),
text,
pos.saturating_sub(1),
true,
);
let indent = doc.indent_unit().repeat(indent_level);
let mut text = String::with_capacity(1 + indent.len());
text.push_str(doc.line_ending.as_str());
text.push_str(&indent);
let head = pos + offs + text.chars().count();
// TODO: range replace or extend
// range.replace(|range| range.is_empty(), head); -> fn extend if cond true, new head pos
// can be used with cx.mode to do replace or extend on most changes
ranges.push(Range::new(
if range.is_empty() {
head
} else {
range.anchor + offs
},
head,
));
// if between a bracket pair
if helix_core::auto_pairs::PAIRS.contains(&(prev, curr)) {
// another newline, indent the end bracket one level less
let indent = doc.indent_unit().repeat(indent_level.saturating_sub(1));
text.push_str(doc.line_ending.as_str());
text.push_str(&indent);
}
offs += text.chars().count();
(pos, pos, Some(text.into()))
});
transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index()));
//
doc.apply(&transaction, view.id);
}
// TODO: handle indent-aware delete
pub fn delete_char_backward(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
let pos = range.cursor(text);
(
graphemes::nth_prev_grapheme_boundary(text, pos, count),
pos,
None,
)
});
doc.apply(&transaction, view.id);
}
pub fn delete_char_forward(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
let pos = range.cursor(text);
(
pos,
graphemes::nth_next_grapheme_boundary(text, pos, count),
None,
)
});
doc.apply(&transaction, view.id);
}
pub fn delete_word_backward(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc
.selection(view.id)
.clone()
.transform(|range| movement::move_prev_word_start(text, range, count));
doc.set_selection(view.id, selection);
delete_selection(cx)
}
}
// Undo / Redo
// TODO: each command could simply return a Option<transaction>, then the higher level handles
// storing it?
fn undo(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let view_id = view.id;
doc.undo(view_id);
}
fn redo(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let view_id = view.id;
doc.redo(view_id);
}
// Yank / Paste
fn yank(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let values: Vec<String> = doc
.selection(view.id)
.fragments(text)
.map(Cow::into_owned)
.collect();
let msg = format!(
"yanked {} selection(s) to register {}",
values.len(),
cx.selected_register.name()
);
cx.editor
.registers
.write(cx.selected_register.name(), values);
cx.editor.set_status(msg);
exit_select_mode(cx);
}
fn yank_joined_to_clipboard_impl(
editor: &mut Editor,
separator: &str,
clipboard_type: ClipboardType,
) -> anyhow::Result<()> {
let (view, doc) = current!(editor);
let text = doc.text().slice(..);
let values: Vec<String> = doc
.selection(view.id)
.fragments(text)
.map(Cow::into_owned)
.collect();
let msg = format!(
"joined and yanked {} selection(s) to system clipboard",
values.len(),
);
let joined = values.join(separator);
editor
.clipboard_provider
.set_contents(joined, clipboard_type)
.context("Couldn't set system clipboard content")?;
editor.set_status(msg);
Ok(())
}
fn yank_joined_to_clipboard(cx: &mut Context) {
let line_ending = current!(cx.editor).1.line_ending;
let _ = yank_joined_to_clipboard_impl(
&mut cx.editor,
line_ending.as_str(),
ClipboardType::Clipboard,
);
exit_select_mode(cx);
}
fn yank_main_selection_to_clipboard_impl(
editor: &mut Editor,
clipboard_type: ClipboardType,
) -> anyhow::Result<()> {
let (view, doc) = current!(editor);
let text = doc.text().slice(..);
let value = doc.selection(view.id).primary().fragment(text);
if let Err(e) = editor
.clipboard_provider
.set_contents(value.into_owned(), clipboard_type)
{
bail!("Couldn't set system clipboard content: {}", e);
}
editor.set_status("yanked main selection to system clipboard".to_owned());
Ok(())
}
fn yank_main_selection_to_clipboard(cx: &mut Context) {
let _ = yank_main_selection_to_clipboard_impl(&mut cx.editor, ClipboardType::Clipboard);
}
fn yank_joined_to_primary_clipboard(cx: &mut Context) {
let line_ending = current!(cx.editor).1.line_ending;
let _ = yank_joined_to_clipboard_impl(
&mut cx.editor,
line_ending.as_str(),
ClipboardType::Selection,
);
}
fn yank_main_selection_to_primary_clipboard(cx: &mut Context) {
let _ = yank_main_selection_to_clipboard_impl(&mut cx.editor, ClipboardType::Selection);
exit_select_mode(cx);
}
#[derive(Copy, Clone)]
enum Paste {
Before,
After,
}
fn paste_impl(
values: &[String],
doc: &mut Document,
view: &View,
action: Paste,
) -> Option<Transaction> {
let repeat = std::iter::repeat(
values
.last()
.map(|value| Tendril::from_slice(value))
.unwrap(),
);
// if any of values ends with a line ending, it's linewise paste
let linewise = values
.iter()
.any(|value| get_line_ending_of_str(value).is_some());
let mut values = values.iter().cloned().map(Tendril::from).chain(repeat);
let text = doc.text();
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(text, selection, |range| {
let pos = match (action, linewise) {
// paste linewise before
(Paste::Before, true) => text.line_to_char(text.char_to_line(range.from())),
// paste linewise after
(Paste::After, true) => {
let line = range.line_range(text.slice(..)).1;
text.line_to_char((line + 1).min(text.len_lines()))
}
// paste insert
(Paste::Before, false) => range.from(),
// paste append
(Paste::After, false) => range.to(),
};
(pos, pos, Some(values.next().unwrap()))
});
Some(transaction)
}
fn paste_clipboard_impl(
editor: &mut Editor,
action: Paste,
clipboard_type: ClipboardType,
) -> anyhow::Result<()> {
let (view, doc) = current!(editor);
match editor
.clipboard_provider
.get_contents(clipboard_type)
.map(|contents| paste_impl(&[contents], doc, view, action))
{
Ok(Some(transaction)) => {
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
Ok(())
}
Ok(None) => Ok(()),
Err(e) => Err(e.context("Couldn't get system clipboard contents")),
}
}
fn paste_clipboard_after(cx: &mut Context) {
let _ = paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Clipboard);
}
fn paste_clipboard_before(cx: &mut Context) {
let _ = paste_clipboard_impl(&mut cx.editor, Paste::Before, ClipboardType::Clipboard);
}
fn paste_primary_clipboard_after(cx: &mut Context) {
let _ = paste_clipboard_impl(&mut cx.editor, Paste::After, ClipboardType::Selection);
}
fn paste_primary_clipboard_before(cx: &mut Context) {
let _ = paste_clipboard_impl(&mut cx.editor, Paste::Before, ClipboardType::Selection);
}
fn replace_with_yanked(cx: &mut Context) {
let reg_name = cx.selected_register.name();
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
if let Some(values) = registers.read(reg_name) {
if let Some(yank) = values.first() {
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
if !range.is_empty() {
(range.from(), range.to(), Some(yank.as_str().into()))
} else {
(range.from(), range.to(), None)
}
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
}
}
fn replace_selections_with_clipboard_impl(
editor: &mut Editor,
clipboard_type: ClipboardType,
) -> anyhow::Result<()> {
let (view, doc) = current!(editor);
match editor.clipboard_provider.get_contents(clipboard_type) {
Ok(contents) => {
let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
(range.from(), range.to(), Some(contents.as_str().into()))
});
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
Ok(())
}
Err(e) => Err(e.context("Couldn't get system clipboard contents")),
}
}
fn replace_selections_with_clipboard(cx: &mut Context) {
let _ = replace_selections_with_clipboard_impl(&mut cx.editor, ClipboardType::Clipboard);
}
fn replace_selections_with_primary_clipboard(cx: &mut Context) {
let _ = replace_selections_with_clipboard_impl(&mut cx.editor, ClipboardType::Selection);
}
fn paste_after(cx: &mut Context) {
let reg_name = cx.selected_register.name();
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
if let Some(transaction) = registers
.read(reg_name)
.and_then(|values| paste_impl(values, doc, view, Paste::After))
{
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
}
fn paste_before(cx: &mut Context) {
let reg_name = cx.selected_register.name();
let (view, doc) = current!(cx.editor);
let registers = &mut cx.editor.registers;
if let Some(transaction) = registers
.read(reg_name)
.and_then(|values| paste_impl(values, doc, view, Paste::Before))
{
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
}
fn get_lines(doc: &Document, view_id: ViewId) -> Vec<usize> {
let mut lines = Vec::new();
// Get all line numbers
for range in doc.selection(view_id) {
let (start, end) = range.line_range(doc.text().slice(..));
for line in start..=end {
lines.push(line)
}
}
lines.sort_unstable(); // sorting by usize so _unstable is preferred
lines.dedup();
lines
}
fn indent(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let lines = get_lines(doc, view.id);
// Indent by one level
let indent = Tendril::from(doc.indent_unit().repeat(count));
let transaction = Transaction::change(
doc.text(),
lines.into_iter().map(|line| {
let pos = doc.text().line_to_char(line);
(pos, pos, Some(indent.clone()))
}),
);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn unindent(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let lines = get_lines(doc, view.id);
let mut changes = Vec::with_capacity(lines.len());
let tab_width = doc.tab_width();
let indent_width = count * tab_width;
for line_idx in lines {
let line = doc.text().line(line_idx);
let mut width = 0;
let mut pos = 0;
for ch in line.chars() {
match ch {
' ' => width += 1,
'\t' => width = (width / tab_width + 1) * tab_width,
_ => break,
}
pos += 1;
if width >= indent_width {
break;
}
}
// now delete from start to first non-blank
if pos > 0 {
let start = doc.text().line_to_char(line_idx);
changes.push((start, start + pos, None))
}
}
let transaction = Transaction::change(doc.text(), changes.into_iter());
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn format_selections(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
// via lsp if available
// else via tree-sitter indentation calculations
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let ranges: Vec<lsp::Range> = doc
.selection(view.id)
.iter()
.map(|range| range_to_lsp_range(doc.text(), *range, language_server.offset_encoding()))
.collect();
// TODO: all of the TODO's and commented code inside the loop,
// to make this actually work.
for _range in ranges {
let _language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
// TODO: handle fails
// TODO: concurrent map
// TODO: need to block to get the formatting
// let edits = block_on(language_server.text_document_range_formatting(
// doc.identifier(),
// range,
// lsp::FormattingOptions::default(),
// ))
// .unwrap_or_default();
// let transaction = helix_lsp::util::generate_transaction_from_edits(
// doc.text(),
// edits,
// language_server.offset_encoding(),
// );
// doc.apply(&transaction, view.id);
}
doc.append_changes_to_history(view.id);
}
fn join_selections(cx: &mut Context) {
use movement::skip_while;
let (view, doc) = current!(cx.editor);
let text = doc.text();
let slice = doc.text().slice(..);
let mut changes = Vec::new();
let fragment = Tendril::from(" ");
for selection in doc.selection(view.id) {
let (start, mut end) = selection.line_range(slice);
if start == end {
end = (end + 1).min(text.len_lines() - 1);
}
let lines = start..end;
changes.reserve(lines.len());
for line in lines {
let start = line_end_char_index(&slice, line);
let mut end = text.line_to_char(line + 1);
end = skip_while(slice, end, |ch| matches!(ch, ' ' | '\t')).unwrap_or(end);
// need to skip from start, not end
let change = (start, end, Some(fragment.clone()));
changes.push(change);
}
}
changes.sort_unstable_by_key(|(from, _to, _text)| *from);
changes.dedup();
// TODO: joining multiple empty lines should be replaced by a single space.
// need to merge change ranges that touch
let transaction = Transaction::change(doc.text(), changes.into_iter());
// TODO: select inserted spaces
// .with_selection(selection);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn keep_selections(cx: &mut Context) {
// keep selections matching regex
let prompt = ui::regex_prompt(cx, "keep:".to_string(), move |view, doc, _, regex| {
let text = doc.text().slice(..);
if let Some(selection) = selection::keep_matches(text, doc.selection(view.id), &regex) {
doc.set_selection(view.id, selection);
}
});
cx.push_layer(Box::new(prompt));
}
fn keep_primary_selection(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let range = doc.selection(view.id).primary();
doc.set_selection(view.id, Selection::single(range.anchor, range.head));
}
fn completion(cx: &mut Context) {
// trigger on trigger char, or if user calls it
// (or on word char typing??)
// after it's triggered, if response marked is_incomplete, update on every subsequent keypress
//
// lsp calls are done via a callback: it sends a request and doesn't block.
// when we get the response similarly to notification, trigger a call to the completion popup
//
// language_server.completion(params, |cx: &mut Context, _meta, response| {
// // called at response time
// // compositor, lookup completion layer
// // downcast dyn Component to Completion component
// // emit response to completion (completion.complete/handle(response))
// })
//
// typing after prompt opens: usually start offset is tracked and everything between
// start_offset..cursor is replaced. For our purposes we could keep the start state (doc,
// selection) and revert to them before applying. This needs to properly reset changes/history
// though...
//
// company-mode does this by matching the prefix of the completion and removing it.
// ignore isIncomplete for now
// keep state while typing
// the behavior should be, filter the menu based on input
// if items returns empty at any point, remove the popup
// if backspace past initial offset point, remove the popup
//
// debounce requests!
//
// need an idle timeout thing.
// https://github.com/company-mode/company-mode/blob/master/company.el#L620-L622
//
// "The idle delay in seconds until completion starts automatically.
// The prefix still has to satisfy `company-minimum-prefix-length' before that
// happens. The value of nil means no idle completion."
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
let offset_encoding = language_server.offset_encoding();
let cursor = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let pos = pos_to_lsp_pos(doc.text(), cursor, offset_encoding);
let future = language_server.completion(doc.identifier(), pos, None);
let trigger_offset = cursor;
cx.callback(
future,
move |editor: &mut Editor,
compositor: &mut Compositor,
response: Option<lsp::CompletionResponse>| {
let (_, doc) = current!(editor);
if doc.mode() != Mode::Insert {
// we're not in insert mode anymore
return;
}
let items = match response {
Some(lsp::CompletionResponse::Array(items)) => items,
// TODO: do something with is_incomplete
Some(lsp::CompletionResponse::List(lsp::CompletionList {
is_incomplete: _is_incomplete,
items,
})) => items,
None => Vec::new(),
};
if items.is_empty() {
editor.set_error("No completion available".to_string());
return;
}
let size = compositor.size();
let ui = compositor
.find(std::any::type_name::<ui::EditorView>())
.unwrap();
if let Some(ui) = ui.as_any_mut().downcast_mut::<ui::EditorView>() {
ui.set_completion(items, offset_encoding, trigger_offset, size);
};
},
);
}
fn hover(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let language_server = match doc.language_server() {
Some(language_server) => language_server,
None => return,
};
// TODO: factor out a doc.position_identifier() that returns lsp::TextDocumentPositionIdentifier
let pos = pos_to_lsp_pos(
doc.text(),
doc.selection(view.id)
.primary()
.cursor(doc.text().slice(..)),
language_server.offset_encoding(),
);
let future = language_server.text_document_hover(doc.identifier(), pos, None);
cx.callback(
future,
move |editor: &mut Editor, compositor: &mut Compositor, response: Option<lsp::Hover>| {
if let Some(hover) = response {
// hover.contents / .range <- used for visualizing
let contents = match hover.contents {
lsp::HoverContents::Scalar(contents) => {
// markedstring(string/languagestring to be highlighted)
// TODO
log::error!("hover contents {:?}", contents);
return;
}
lsp::HoverContents::Array(contents) => {
log::error!("hover contents {:?}", contents);
return;
}
// TODO: render markdown
lsp::HoverContents::Markup(contents) => contents.value,
};
// skip if contents empty
let contents = ui::Markdown::new(contents, editor.syn_loader.clone());
let popup = Popup::new(contents);
compositor.push(Box::new(popup));
}
},
);
}
// comments
fn toggle_comments(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let token = doc
.language_config()
.and_then(|lc| lc.comment_token.as_ref())
.map(|tc| tc.as_ref());
let transaction = comment::toggle_line_comments(doc.text(), doc.selection(view.id), token);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
exit_select_mode(cx);
}
fn rotate_selections(cx: &mut Context, direction: Direction) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let mut selection = doc.selection(view.id).clone();
let index = selection.primary_index();
let len = selection.len();
selection.set_primary_index(match direction {
Direction::Forward => (index + count) % len,
Direction::Backward => (index + (len.saturating_sub(count) % len)) % len,
});
doc.set_selection(view.id, selection);
}
fn rotate_selections_forward(cx: &mut Context) {
rotate_selections(cx, Direction::Forward)
}
fn rotate_selections_backward(cx: &mut Context) {
rotate_selections(cx, Direction::Backward)
}
fn rotate_selection_contents(cx: &mut Context, direction: Direction) {
let count = cx.count;
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
let mut fragments: Vec<_> = selection
.fragments(text)
.map(|fragment| Tendril::from_slice(&fragment))
.collect();
let group = count
.map(|count| count.get())
.unwrap_or(fragments.len()) // default to rotating everything as one group
.min(fragments.len());
for chunk in fragments.chunks_mut(group) {
// TODO: also modify main index
match direction {
Direction::Forward => chunk.rotate_right(1),
Direction::Backward => chunk.rotate_left(1),
};
}
let transaction = Transaction::change(
doc.text(),
selection
.ranges()
.iter()
.zip(fragments)
.map(|(range, fragment)| (range.from(), range.to(), Some(fragment))),
);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
fn rotate_selection_contents_forward(cx: &mut Context) {
rotate_selection_contents(cx, Direction::Forward)
}
fn rotate_selection_contents_backward(cx: &mut Context) {
rotate_selection_contents(cx, Direction::Backward)
}
// tree sitter node selection
fn expand_selection(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
if let Some(syntax) = doc.syntax() {
let text = doc.text().slice(..);
let selection = object::expand_selection(syntax, text, doc.selection(view.id));
doc.set_selection(view.id, selection);
}
}
fn match_brackets(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
if let Some(syntax) = doc.syntax() {
let pos = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
if let Some(pos) = match_brackets::find(syntax, doc.text(), pos) {
let selection = Selection::point(pos);
doc.set_selection(view.id, selection);
};
}
}
//
fn jump_forward(cx: &mut Context) {
let count = cx.count();
let (view, _doc) = current!(cx.editor);
if let Some((id, selection)) = view.jumps.forward(count) {
view.doc = *id;
let selection = selection.clone();
let (view, doc) = current!(cx.editor); // refetch doc
doc.set_selection(view.id, selection);
align_view(doc, view, Align::Center);
};
}
fn jump_backward(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
if let Some((id, selection)) = view.jumps.backward(view.id, doc, count) {
// manually set the alternate_file as we cannot use the Editor::switch function here.
if view.doc != *id {
view.last_accessed_doc = Some(view.doc)
}
view.doc = *id;
let selection = selection.clone();
let (view, doc) = current!(cx.editor); // refetch doc
doc.set_selection(view.id, selection);
align_view(doc, view, Align::Center);
};
}
fn rotate_view(cx: &mut Context) {
cx.editor.focus_next()
}
// split helper, clear it later
fn split(cx: &mut Context, action: Action) {
let (view, doc) = current!(cx.editor);
let id = doc.id();
let selection = doc.selection(view.id).clone();
let offset = view.offset;
cx.editor.switch(id, action);
// match the selection in the previous view
let (view, doc) = current!(cx.editor);
view.offset = offset;
doc.set_selection(view.id, selection);
}
fn hsplit(cx: &mut Context) {
split(cx, Action::HorizontalSplit);
}
fn vsplit(cx: &mut Context) {
split(cx, Action::VerticalSplit);
}
fn wclose(cx: &mut Context) {
let view_id = view!(cx.editor).id;
// close current split
cx.editor.close(view_id, /* close_buffer */ false);
}
fn select_register(cx: &mut Context) {
cx.on_next_key(move |cx, event| {
if let Some(ch) = event.char() {
cx.editor.selected_register.select(ch);
}
})
}
fn align_view_top(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
align_view(doc, view, Align::Top);
}
fn align_view_center(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
align_view(doc, view, Align::Center);
}
fn align_view_bottom(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
align_view(doc, view, Align::Bottom);
}
fn align_view_middle(cx: &mut Context) {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let pos = doc.selection(view.id).primary().cursor(text);
let pos = coords_at_pos(text, pos);
view.offset.col = pos
.col
.saturating_sub((view.inner_area().width as usize) / 2);
}
fn scroll_up(cx: &mut Context) {
scroll(cx, cx.count(), Direction::Backward);
}
fn scroll_down(cx: &mut Context) {
scroll(cx, cx.count(), Direction::Forward);
}
fn select_textobject_around(cx: &mut Context) {
select_textobject(cx, textobject::TextObject::Around);
}
fn select_textobject_inner(cx: &mut Context) {
select_textobject(cx, textobject::TextObject::Inside);
}
fn select_textobject(cx: &mut Context, objtype: textobject::TextObject) {
let count = cx.count();
cx.on_next_key(move |cx, event| {
if let Some(ch) = event.char() {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| {
match ch {
'w' => textobject::textobject_word(text, range, objtype, count),
// TODO: cancel new ranges if inconsistent surround matches across lines
ch if !ch.is_ascii_alphanumeric() => {
textobject::textobject_surround(text, range, objtype, ch, count)
}
_ => range,
}
});
doc.set_selection(view.id, selection);
}
})
}
fn surround_add(cx: &mut Context) {
cx.on_next_key(move |cx, event| {
if let Some(ch) = event.char() {
let (view, doc) = current!(cx.editor);
let selection = doc.selection(view.id);
let (open, close) = surround::get_pair(ch);
let mut changes = Vec::new();
for range in selection.iter() {
changes.push((range.from(), range.from(), Some(Tendril::from_char(open))));
changes.push((range.to(), range.to(), Some(Tendril::from_char(close))));
}
let transaction = Transaction::change(doc.text(), changes.into_iter());
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
})
}
fn surround_replace(cx: &mut Context) {
let count = cx.count();
cx.on_next_key(move |cx, event| {
if let Some(from) = event.char() {
cx.on_next_key(move |cx, event| {
if let Some(to) = event.char() {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
let change_pos = match surround::get_surround_pos(text, selection, from, count)
{
Some(c) => c,
None => return,
};
let (open, close) = surround::get_pair(to);
let transaction = Transaction::change(
doc.text(),
change_pos.iter().enumerate().map(|(i, &pos)| {
(
pos,
pos + 1,
Some(Tendril::from_char(if i % 2 == 0 { open } else { close })),
)
}),
);
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
});
}
})
}
fn surround_delete(cx: &mut Context) {
let count = cx.count();
cx.on_next_key(move |cx, event| {
if let Some(ch) = event.char() {
let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..);
let selection = doc.selection(view.id);
let change_pos = match surround::get_surround_pos(text, selection, ch, count) {
Some(c) => c,
None => return,
};
let transaction =
Transaction::change(doc.text(), change_pos.into_iter().map(|p| (p, p + 1, None)));
doc.apply(&transaction, view.id);
doc.append_changes_to_history(view.id);
}
})
}
fn suspend(_cx: &mut Context) {
#[cfg(not(windows))]
signal_hook::low_level::raise(signal_hook::consts::signal::SIGTSTP).unwrap();
}