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Introduce a command context that carries the executor and other fields.

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imgbot
Blaž Hrastnik 4 years ago
parent ae8a9e5bac
commit 8f0bcfe286
2 changed files with 264 additions and 219 deletions
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29
helix-term/src/application.rs
Unescape Escape View File

@ -476,13 +476,24 @@ impl<'a> Application<'a> {
match view.doc.mode() { match view.doc.mode() {
Mode::Insert => { Mode::Insert => {
if let Some(command) = self.keymap[&Mode::Insert].get(&keys) { if let Some(command) = self.keymap[&Mode::Insert].get(&keys) {
command(view, 1); let mut cx = helix_view::commands::Context {
view,
executor: self.executor,
count: 1,
};
command(&mut cx);
} else if let KeyEvent { } else if let KeyEvent {
code: KeyCode::Char(c), code: KeyCode::Char(c),
.. ..
} = event } = event
{ {
commands::insert::insert_char(view, c); let mut cx = helix_view::commands::Context {
view,
executor: self.executor,
count: 1,
};
commands::insert::insert_char(&mut cx, c);
} }
view.ensure_cursor_in_view(); view.ensure_cursor_in_view();
} }
@ -544,7 +555,12 @@ impl<'a> Application<'a> {
// HAXX: special casing for command mode // HAXX: special casing for command mode
} else if let Some(command) = self.keymap[&Mode::Normal].get(&keys) { } else if let Some(command) = self.keymap[&Mode::Normal].get(&keys) {
command(view, 1); let mut cx = helix_view::commands::Context {
view,
executor: self.executor,
count: 1,
};
command(&mut cx);
// TODO: simplistic ensure cursor in view for now // TODO: simplistic ensure cursor in view for now
view.ensure_cursor_in_view(); view.ensure_cursor_in_view();
@ -552,7 +568,12 @@ impl<'a> Application<'a> {
} }
mode => { mode => {
if let Some(command) = self.keymap[&mode].get(&keys) { if let Some(command) = self.keymap[&mode].get(&keys) {
command(view, 1); let mut cx = helix_view::commands::Context {
view,
executor: self.executor,
count: 1,
};
command(&mut cx);
// TODO: simplistic ensure cursor in view for now // TODO: simplistic ensure cursor in view for now
view.ensure_cursor_in_view(); view.ensure_cursor_in_view();

454
helix-view/src/commands.rs
Unescape Escape View File

@ -14,44 +14,54 @@ use crate::{
view::{View, PADDING}, view::{View, PADDING},
}; };
pub struct Context<'a, 'b> {
pub count: usize,
pub view: &'a mut View,
pub executor: &'a smol::Executor<'b>,
}
/// A command is a function that takes the current state and a count, and does a side-effect on the /// A command is a function that takes the current state and a count, and does a side-effect on the
/// state (usually by creating and applying a transaction). /// state (usually by creating and applying a transaction).
pub type Command = fn(view: &mut View, count: usize); pub type Command = fn(cx: &mut Context);
pub fn move_char_left(view: &mut View, count: usize) { pub fn move_char_left(cx: &mut Context) {
let selection = let selection =
view.doc cx.view
.doc
.state .state
.move_selection(Direction::Backward, Granularity::Character, count); .move_selection(Direction::Backward, Granularity::Character, cx.count);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn move_char_right(view: &mut View, count: usize) { pub fn move_char_right(cx: &mut Context) {
let selection = let selection =
view.doc cx.view
.doc
.state .state
.move_selection(Direction::Forward, Granularity::Character, count); .move_selection(Direction::Forward, Granularity::Character, cx.count);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn move_line_up(view: &mut View, count: usize) { pub fn move_line_up(cx: &mut Context) {
let selection = view let selection =
.doc cx.view
.state .doc
.move_selection(Direction::Backward, Granularity::Line, count); .state
view.doc.set_selection(selection); .move_selection(Direction::Backward, Granularity::Line, cx.count);
cx.view.doc.set_selection(selection);
} }
pub fn move_line_down(view: &mut View, count: usize) { pub fn move_line_down(cx: &mut Context) {
let selection = view let selection =
.doc cx.view
.state .doc
.move_selection(Direction::Forward, Granularity::Line, count); .state
view.doc.set_selection(selection); .move_selection(Direction::Forward, Granularity::Line, cx.count);
cx.view.doc.set_selection(selection);
} }
pub fn move_line_end(view: &mut View, _count: usize) { pub fn move_line_end(cx: &mut Context) {
let lines = selection_lines(&view.doc.state); let lines = selection_lines(&cx.view.doc.state);
let positions = lines let positions = lines
.into_iter() .into_iter()
@ -60,78 +70,78 @@ pub fn move_line_end(view: &mut View, _count: usize) {
// Line end is pos at the start of next line - 1 // Line end is pos at the start of next line - 1
// subtract another 1 because the line ends with \n // subtract another 1 because the line ends with \n
view.doc.text().line_to_char(index + 1).saturating_sub(2) cx.view.doc.text().line_to_char(index + 1).saturating_sub(2)
}) })
.map(|pos| Range::new(pos, pos)); .map(|pos| Range::new(pos, pos));
let selection = Selection::new(positions.collect(), 0); let selection = Selection::new(positions.collect(), 0);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn move_line_start(view: &mut View, _count: usize) { pub fn move_line_start(cx: &mut Context) {
let lines = selection_lines(&view.doc.state); let lines = selection_lines(&cx.view.doc.state);
let positions = lines let positions = lines
.into_iter() .into_iter()
.map(|index| { .map(|index| {
// adjust all positions to the start of the line. // adjust all positions to the start of the line.
view.doc.text().line_to_char(index) cx.view.doc.text().line_to_char(index)
}) })
.map(|pos| Range::new(pos, pos)); .map(|pos| Range::new(pos, pos));
let selection = Selection::new(positions.collect(), 0); let selection = Selection::new(positions.collect(), 0);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn move_next_word_start(view: &mut View, count: usize) { pub fn move_next_word_start(cx: &mut Context) {
let pos = view.doc.state.move_pos( let pos = cx.view.doc.state.move_pos(
view.doc.selection().cursor(), cx.view.doc.selection().cursor(),
Direction::Forward, Direction::Forward,
Granularity::Word, Granularity::Word,
count, cx.count,
); );
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
pub fn move_prev_word_start(view: &mut View, count: usize) { pub fn move_prev_word_start(cx: &mut Context) {
let pos = view.doc.state.move_pos( let pos = cx.view.doc.state.move_pos(
view.doc.selection().cursor(), cx.view.doc.selection().cursor(),
Direction::Backward, Direction::Backward,
Granularity::Word, Granularity::Word,
count, cx.count,
); );
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
pub fn move_next_word_end(view: &mut View, count: usize) { pub fn move_next_word_end(cx: &mut Context) {
let pos = State::move_next_word_end( let pos = State::move_next_word_end(
&view.doc.text().slice(..), &cx.view.doc.text().slice(..),
view.doc.selection().cursor(), cx.view.doc.selection().cursor(),
count, cx.count,
); );
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
pub fn move_file_start(view: &mut View, _count: usize) { pub fn move_file_start(cx: &mut Context) {
view.doc.set_selection(Selection::point(0)); cx.view.doc.set_selection(Selection::point(0));
view.doc.mode = Mode::Normal; cx.view.doc.mode = Mode::Normal;
} }
pub fn move_file_end(view: &mut View, _count: usize) { pub fn move_file_end(cx: &mut Context) {
let text = &view.doc.text(); let text = &cx.view.doc.text();
let last_line = text.line_to_char(text.len_lines().saturating_sub(2)); let last_line = text.line_to_char(text.len_lines().saturating_sub(2));
view.doc.set_selection(Selection::point(last_line)); cx.view.doc.set_selection(Selection::point(last_line));
view.doc.mode = Mode::Normal; cx.view.doc.mode = Mode::Normal;
} }
pub fn check_cursor_in_view(view: &mut View) -> bool { pub fn check_cursor_in_view(view: &View) -> bool {
let cursor = view.doc.selection().cursor(); let cursor = view.doc.selection().cursor();
let line = view.doc.text().char_to_line(cursor); let line = view.doc.text().char_to_line(cursor);
let document_end = view.first_line + view.size.1.saturating_sub(1) as usize; let document_end = view.first_line + view.size.1.saturating_sub(1) as usize;
@ -142,172 +152,182 @@ pub fn check_cursor_in_view(view: &mut View) -> bool {
true true
} }
pub fn page_up(view: &mut View, _count: usize) { pub fn page_up(cx: &mut Context) {
if view.first_line < PADDING { if cx.view.first_line < PADDING {
return; return;
} }
view.first_line = view.first_line.saturating_sub(view.size.1 as usize); cx.view.first_line = cx.view.first_line.saturating_sub(cx.view.size.1 as usize);
if !check_cursor_in_view(view) { if !check_cursor_in_view(cx.view) {
let text = view.doc.text(); let text = cx.view.doc.text();
let pos = text.line_to_char(view.last_line().saturating_sub(PADDING)); let pos = text.line_to_char(cx.view.last_line().saturating_sub(PADDING));
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
} }
pub fn page_down(view: &mut View, _count: usize) { pub fn page_down(cx: &mut Context) {
view.first_line += view.size.1 as usize + PADDING; cx.view.first_line += cx.view.size.1 as usize + PADDING;
if view.first_line < view.doc.text().len_lines() { if cx.view.first_line < cx.view.doc.text().len_lines() {
let text = view.doc.text(); let text = cx.view.doc.text();
let pos = text.line_to_char(view.first_line as usize); let pos = text.line_to_char(cx.view.first_line as usize);
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
} }
pub fn half_page_up(view: &mut View, _count: usize) { pub fn half_page_up(cx: &mut Context) {
if view.first_line < PADDING { if cx.view.first_line < PADDING {
return; return;
} }
view.first_line = view.first_line.saturating_sub(view.size.1 as usize / 2); cx.view.first_line = cx
.view
.first_line
.saturating_sub(cx.view.size.1 as usize / 2);
if !check_cursor_in_view(view) { if !check_cursor_in_view(cx.view) {
let text = &view.doc.text(); let text = &cx.view.doc.text();
let pos = text.line_to_char(view.last_line() - PADDING); let pos = text.line_to_char(cx.view.last_line() - PADDING);
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
} }
pub fn half_page_down(view: &mut View, _count: usize) { pub fn half_page_down(cx: &mut Context) {
let lines = view.doc.text().len_lines(); let lines = cx.view.doc.text().len_lines();
if view.first_line < lines.saturating_sub(view.size.1 as usize) { if cx.view.first_line < lines.saturating_sub(cx.view.size.1 as usize) {
view.first_line += view.size.1 as usize / 2; cx.view.first_line += cx.view.size.1 as usize / 2;
} }
if !check_cursor_in_view(view) { if !check_cursor_in_view(cx.view) {
let text = view.doc.text(); let text = cx.view.doc.text();
let pos = text.line_to_char(view.first_line as usize); let pos = text.line_to_char(cx.view.first_line as usize);
view.doc.set_selection(Selection::point(pos)); cx.view.doc.set_selection(Selection::point(pos));
} }
} }
// avoid select by default by having a visual mode switch that makes movements into selects // avoid select by default by having a visual mode switch that makes movements into selects
pub fn extend_char_left(view: &mut View, count: usize) { pub fn extend_char_left(cx: &mut Context) {
let selection = let selection =
view.doc cx.view
.doc
.state .state
.extend_selection(Direction::Backward, Granularity::Character, count); .extend_selection(Direction::Backward, Granularity::Character, cx.count);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn extend_char_right(view: &mut View, count: usize) { pub fn extend_char_right(cx: &mut Context) {
let selection = let selection =
view.doc cx.view
.doc
.state .state
.extend_selection(Direction::Forward, Granularity::Character, count); .extend_selection(Direction::Forward, Granularity::Character, cx.count);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn extend_line_up(view: &mut View, count: usize) { pub fn extend_line_up(cx: &mut Context) {
let selection = view let selection =
.doc cx.view
.state .doc
.extend_selection(Direction::Backward, Granularity::Line, count); .state
view.doc.set_selection(selection); .extend_selection(Direction::Backward, Granularity::Line, cx.count);
cx.view.doc.set_selection(selection);
} }
pub fn extend_line_down(view: &mut View, count: usize) { pub fn extend_line_down(cx: &mut Context) {
let selection = view let selection =
.doc cx.view
.state .doc
.extend_selection(Direction::Forward, Granularity::Line, count); .state
view.doc.set_selection(selection); .extend_selection(Direction::Forward, Granularity::Line, cx.count);
cx.view.doc.set_selection(selection);
} }
pub fn split_selection_on_newline(view: &mut View, _count: usize) { pub fn split_selection_on_newline(cx: &mut Context) {
let text = &view.doc.text().slice(..); let text = &cx.view.doc.text().slice(..);
// only compile the regex once // only compile the regex once
#[allow(clippy::trivial_regex)] #[allow(clippy::trivial_regex)]
static REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\n").unwrap()); static REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\n").unwrap());
let selection = selection::split_on_matches(text, view.doc.selection(), &REGEX); let selection = selection::split_on_matches(text, cx.view.doc.selection(), &REGEX);
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn select_line(view: &mut View, _count: usize) { pub fn select_line(cx: &mut Context) {
// TODO: count // TODO: count
let pos = view.doc.selection().primary(); let pos = cx.view.doc.selection().primary();
let text = view.doc.text(); let text = cx.view.doc.text();
let line = text.char_to_line(pos.head); let line = text.char_to_line(pos.head);
let start = text.line_to_char(line); let start = text.line_to_char(line);
let end = text.line_to_char(line + 1).saturating_sub(1); let end = text.line_to_char(line + 1).saturating_sub(1);
view.doc.set_selection(Selection::single(start, end)); cx.view.doc.set_selection(Selection::single(start, end));
} }
pub fn delete_selection(view: &mut View, _count: usize) { pub fn delete_selection(cx: &mut Context) {
let transaction = Transaction::change_by_selection(&view.doc.state, |range| { let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| {
(range.from(), range.to() + 1, None) (range.from(), range.to() + 1, None)
}); });
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
append_changes_to_history(view); append_changes_to_history(cx);
} }
pub fn change_selection(view: &mut View, count: usize) { pub fn change_selection(cx: &mut Context) {
delete_selection(view, count); delete_selection(cx);
insert_mode(view, count); insert_mode(cx);
} }
pub fn collapse_selection(view: &mut View, _count: usize) { pub fn collapse_selection(cx: &mut Context) {
let selection = view let selection = cx
.view
.doc .doc
.selection() .selection()
.transform(|range| Range::new(range.head, range.head)); .transform(|range| Range::new(range.head, range.head));
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
pub fn flip_selections(view: &mut View, _count: usize) { pub fn flip_selections(cx: &mut Context) {
let selection = view let selection = cx
.view
.doc .doc
.selection() .selection()
.transform(|range| Range::new(range.head, range.anchor)); .transform(|range| Range::new(range.head, range.anchor));
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
fn enter_insert_mode(view: &mut View) { fn enter_insert_mode(cx: &mut Context) {
view.doc.mode = Mode::Insert; cx.view.doc.mode = Mode::Insert;
append_changes_to_history(view); append_changes_to_history(cx);
} }
// inserts at the start of each selection // inserts at the start of each selection
pub fn insert_mode(view: &mut View, _count: usize) { pub fn insert_mode(cx: &mut Context) {
enter_insert_mode(view); enter_insert_mode(cx);
let selection = view let selection = cx
.view
.doc .doc
.selection() .selection()
.transform(|range| Range::new(range.to(), range.from())); .transform(|range| Range::new(range.to(), range.from()));
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
// inserts at the end of each selection // inserts at the end of each selection
pub fn append_mode(view: &mut View, _count: usize) { pub fn append_mode(cx: &mut Context) {
enter_insert_mode(view); enter_insert_mode(cx);
view.doc.restore_cursor = true; cx.view.doc.restore_cursor = true;
// TODO: as transaction // TODO: as transaction
let text = &view.doc.text().slice(..); let text = &cx.view.doc.text().slice(..);
let selection = view.doc.selection().transform(|range| { let selection = cx.view.doc.selection().transform(|range| {
// TODO: to() + next char // TODO: to() + next char
Range::new( Range::new(
range.from(), range.from(),
graphemes::next_grapheme_boundary(text, range.to()), graphemes::next_grapheme_boundary(text, range.to()),
) )
}); });
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
} }
// TODO: I, A, o and O can share a lot of the primitives. // TODO: I, A, o and O can share a lot of the primitives.
@ -332,30 +352,30 @@ fn selection_lines(state: &State) -> Vec<usize> {
} }
// I inserts at the start of each line with a selection // I inserts at the start of each line with a selection
pub fn prepend_to_line(view: &mut View, count: usize) { pub fn prepend_to_line(cx: &mut Context) {
enter_insert_mode(view); enter_insert_mode(cx);
move_line_start(view, count); move_line_start(cx);
} }
// A inserts at the end of each line with a selection // A inserts at the end of each line with a selection
pub fn append_to_line(view: &mut View, count: usize) { pub fn append_to_line(cx: &mut Context) {
enter_insert_mode(view); enter_insert_mode(cx);
move_line_end(view, count); move_line_end(cx);
} }
// o inserts a new line after each line with a selection // o inserts a new line after each line with a selection
pub fn open_below(view: &mut View, _count: usize) { pub fn open_below(cx: &mut Context) {
enter_insert_mode(view); enter_insert_mode(cx);
let lines = selection_lines(&view.doc.state); let lines = selection_lines(&cx.view.doc.state);
let positions: Vec<_> = lines let positions: Vec<_> = lines
.into_iter() .into_iter()
.map(|index| { .map(|index| {
// adjust all positions to the end of the line/start of the next one. // adjust all positions to the end of the line/start of the next one.
view.doc.text().line_to_char(index + 1) cx.view.doc.text().line_to_char(index + 1)
}) })
.collect(); .collect();
@ -376,82 +396,85 @@ pub fn open_below(view: &mut View, _count: usize) {
0, 0,
); );
let transaction = Transaction::change(&view.doc.state, changes).with_selection(selection); let transaction = Transaction::change(&cx.view.doc.state, changes).with_selection(selection);
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
// O inserts a new line before each line with a selection // O inserts a new line before each line with a selection
fn append_changes_to_history(view: &mut View) { fn append_changes_to_history(cx: &mut Context) {
if view.doc.changes.is_empty() { if cx.view.doc.changes.is_empty() {
return; return;
} }
let new_changeset = ChangeSet::new(view.doc.text()); let new_changeset = ChangeSet::new(cx.view.doc.text());
let changes = std::mem::replace(&mut view.doc.changes, new_changeset); let changes = std::mem::replace(&mut cx.view.doc.changes, new_changeset);
// Instead of doing this messy merge we could always commit, and based on transaction // Instead of doing this messy merge we could always commit, and based on transaction
// annotations either add a new layer or compose into the previous one. // annotations either add a new layer or compose into the previous one.
let transaction = Transaction::from(changes).with_selection(view.doc.selection().clone()); let transaction = Transaction::from(changes).with_selection(cx.view.doc.selection().clone());
// increment document version // increment document version
// TODO: needs to happen on undo/redo too // TODO: needs to happen on undo/redo too
view.doc.version += 1; cx.view.doc.version += 1;
// TODO: trigger lsp/documentDidChange with changes // TODO: trigger lsp/documentDidChange with changes
// HAXX: we need to reconstruct the state as it was before the changes.. // HAXX: we need to reconstruct the state as it was before the changes..
let old_state = std::mem::replace(&mut view.doc.old_state, view.doc.state.clone()); let old_state = std::mem::replace(&mut cx.view.doc.old_state, cx.view.doc.state.clone());
// TODO: take transaction by value? // TODO: take transaction by value?
view.doc.history.commit_revision(&transaction, &old_state); cx.view
.doc
.history
.commit_revision(&transaction, &old_state);
// TODO: notify LSP of changes // TODO: notify LSP of changes
} }
pub fn normal_mode(view: &mut View, _count: usize) { pub fn normal_mode(cx: &mut Context) {
view.doc.mode = Mode::Normal; cx.view.doc.mode = Mode::Normal;
append_changes_to_history(view); append_changes_to_history(cx);
// if leaving append mode, move cursor back by 1 // if leaving append mode, move cursor back by 1
if view.doc.restore_cursor { if cx.view.doc.restore_cursor {
let text = &view.doc.text().slice(..); let text = &cx.view.doc.text().slice(..);
let selection = view.doc.selection().transform(|range| { let selection = cx.view.doc.selection().transform(|range| {
Range::new( Range::new(
range.from(), range.from(),
graphemes::prev_grapheme_boundary(text, range.to()), graphemes::prev_grapheme_boundary(text, range.to()),
) )
}); });
view.doc.set_selection(selection); cx.view.doc.set_selection(selection);
view.doc.restore_cursor = false; cx.view.doc.restore_cursor = false;
} }
} }
pub fn goto_mode(view: &mut View, _count: usize) { pub fn goto_mode(cx: &mut Context) {
view.doc.mode = Mode::Goto; cx.view.doc.mode = Mode::Goto;
} }
// NOTE: Transactions in this module get appended to history when we switch back to normal mode. // NOTE: Transactions in this module get appended to history when we switch back to normal mode.
pub mod insert { pub mod insert {
use super::*; use super::*;
// TODO: insert means add text just before cursor, on exit we should be on the last letter. // TODO: insert means add text just before cursor, on exit we should be on the last letter.
pub fn insert_char(view: &mut View, c: char) { pub fn insert_char(cx: &mut Context, c: char) {
let c = Tendril::from_char(c); let c = Tendril::from_char(c);
let transaction = Transaction::insert(&view.doc.state, c); let transaction = Transaction::insert(&cx.view.doc.state, c);
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
pub fn insert_tab(view: &mut View, _count: usize) { pub fn insert_tab(cx: &mut Context) {
insert_char(view, '\t'); insert_char(cx, '\t');
} }
pub fn insert_newline(view: &mut View, _count: usize) { pub fn insert_newline(cx: &mut Context) {
let transaction = Transaction::change_by_selection(&view.doc.state, |range| { let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| {
let indent_level = helix_core::indent::suggested_indent_for_pos( let indent_level = helix_core::indent::suggested_indent_for_pos(
view.doc.syntax.as_ref(), cx.view.doc.syntax.as_ref(),
&view.doc.state, &cx.view.doc.state,
range.head, range.head,
); );
let indent = " ".repeat(TAB_WIDTH).repeat(indent_level); let indent = " ".repeat(TAB_WIDTH).repeat(indent_level);
@ -460,32 +483,32 @@ pub mod insert {
text.push_str(&indent); text.push_str(&indent);
(range.head, range.head, Some(text.into())) (range.head, range.head, Some(text.into()))
}); });
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
// TODO: handle indent-aware delete // TODO: handle indent-aware delete
pub fn delete_char_backward(view: &mut View, count: usize) { pub fn delete_char_backward(cx: &mut Context) {
let text = &view.doc.text().slice(..); let text = &cx.view.doc.text().slice(..);
let transaction = Transaction::change_by_selection(&view.doc.state, |range| { let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| {
( (
graphemes::nth_prev_grapheme_boundary(text, range.head, count), graphemes::nth_prev_grapheme_boundary(text, range.head, cx.count),
range.head, range.head,
None, None,
) )
}); });
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
pub fn delete_char_forward(view: &mut View, count: usize) { pub fn delete_char_forward(cx: &mut Context) {
let text = &view.doc.text().slice(..); let text = &cx.view.doc.text().slice(..);
let transaction = Transaction::change_by_selection(&view.doc.state, |range| { let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| {
( (
range.head, range.head,
graphemes::nth_next_grapheme_boundary(text, range.head, count), graphemes::nth_next_grapheme_boundary(text, range.head, cx.count),
None, None,
) )
}); });
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
} }
@ -495,31 +518,32 @@ pub fn insert_char_prompt(prompt: &mut Prompt, c: char) {
// Undo / Redo // Undo / Redo
pub fn undo(view: &mut View, _count: usize) { pub fn undo(cx: &mut Context) {
if let Some(revert) = view.doc.history.undo() { if let Some(revert) = cx.view.doc.history.undo() {
view.doc.version += 1; cx.view.doc.version += 1;
view.doc.apply(&revert); cx.view.doc.apply(&revert);
} }
// TODO: each command could simply return a Option<transaction>, then the higher level handles storing it? // TODO: each command could simply return a Option<transaction>, then the higher level handles storing it?
} }
pub fn redo(view: &mut View, _count: usize) { pub fn redo(cx: &mut Context) {
if let Some(transaction) = view.doc.history.redo() { if let Some(transaction) = cx.view.doc.history.redo() {
view.doc.version += 1; cx.view.doc.version += 1;
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
} }
} }
// Yank / Paste // Yank / Paste
pub fn yank(view: &mut View, _count: usize) { pub fn yank(cx: &mut Context) {
// TODO: should selections be made end inclusive? // TODO: should selections be made end inclusive?
let values = view let values = cx
.view
.doc .doc
.state .state
.selection() .selection()
.fragments(&view.doc.text().slice(..)) .fragments(&cx.view.doc.text().slice(..))
.map(|cow| cow.into_owned()) .map(|cow| cow.into_owned())
.collect(); .collect();
@ -528,7 +552,7 @@ pub fn yank(view: &mut View, _count: usize) {
register::set(reg, values); register::set(reg, values);
} }
pub fn paste(view: &mut View, _count: usize) { pub fn paste(cx: &mut Context) {
// TODO: allow specifying reg // TODO: allow specifying reg
let reg = '"'; let reg = '"';
if let Some(values) = register::get(reg) { if let Some(values) = register::get(reg) {
@ -560,19 +584,19 @@ pub fn paste(view: &mut View, _count: usize) {
let transaction = if linewise { let transaction = if linewise {
// paste on the next line // paste on the next line
// TODO: can simply take a range + modifier and compute the right pos without ifs // TODO: can simply take a range + modifier and compute the right pos without ifs
let text = view.doc.text(); let text = cx.view.doc.text();
Transaction::change_by_selection(&view.doc.state, |range| { Transaction::change_by_selection(&cx.view.doc.state, |range| {
let line_end = text.line_to_char(text.char_to_line(range.head) + 1); let line_end = text.line_to_char(text.char_to_line(range.head) + 1);
(line_end, line_end, Some(values.next().unwrap())) (line_end, line_end, Some(values.next().unwrap()))
}) })
} else { } else {
Transaction::change_by_selection(&view.doc.state, |range| { Transaction::change_by_selection(&cx.view.doc.state, |range| {
(range.head + 1, range.head + 1, Some(values.next().unwrap())) (range.head + 1, range.head + 1, Some(values.next().unwrap()))
}) })
}; };
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
append_changes_to_history(view); append_changes_to_history(cx);
} }
} }
@ -593,29 +617,29 @@ fn get_lines(view: &View) -> Vec<usize> {
lines lines
} }
pub fn indent(view: &mut View, _count: usize) { pub fn indent(cx: &mut Context) {
let lines = get_lines(view); let lines = get_lines(cx.view);
// Indent by one level // Indent by one level
let indent = Tendril::from(" ".repeat(TAB_WIDTH)); let indent = Tendril::from(" ".repeat(TAB_WIDTH));
let transaction = Transaction::change( let transaction = Transaction::change(
&view.doc.state, &cx.view.doc.state,
lines.into_iter().map(|line| { lines.into_iter().map(|line| {
let pos = view.doc.text().line_to_char(line); let pos = cx.view.doc.text().line_to_char(line);
(pos, pos, Some(indent.clone())) (pos, pos, Some(indent.clone()))
}), }),
); );
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
append_changes_to_history(view); append_changes_to_history(cx);
} }
pub fn unindent(view: &mut View, _count: usize) { pub fn unindent(cx: &mut Context) {
let lines = get_lines(view); let lines = get_lines(cx.view);
let mut changes = Vec::with_capacity(lines.len()); let mut changes = Vec::with_capacity(lines.len());
for line_idx in lines { for line_idx in lines {
let line = view.doc.text().line(line_idx); let line = cx.view.doc.text().line(line_idx);
let mut width = 0; let mut width = 0;
for ch in line.chars() { for ch in line.chars() {
@ -631,18 +655,18 @@ pub fn unindent(view: &mut View, _count: usize) {
} }
if width > 0 { if width > 0 {
let start = view.doc.text().line_to_char(line_idx); let start = cx.view.doc.text().line_to_char(line_idx);
changes.push((start, start + width, None)) changes.push((start, start + width, None))
} }
} }
let transaction = Transaction::change(&view.doc.state, changes.into_iter()); let transaction = Transaction::change(&cx.view.doc.state, changes.into_iter());
view.doc.apply(&transaction); cx.view.doc.apply(&transaction);
append_changes_to_history(view); append_changes_to_history(cx);
} }
pub fn indent_selection(_view: &mut View, _count: usize) { pub fn indent_selection(_cx: &mut Context) {
// loop over each line and recompute proper indentation // loop over each line and recompute proper indentation
unimplemented!() unimplemented!()
} }

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