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@ -3,12 +3,13 @@ use helix_core::{
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indent::TAB_WIDTH,
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regex::Regex,
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register, selection,
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state::{Direction, Granularity, Mode, State},
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state::{Direction, Granularity, State},
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ChangeSet, Range, Selection, Tendril, Transaction,
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};
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use once_cell::sync::Lazy;
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use crate::{
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document::Mode,
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prompt::Prompt,
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view::{View, PADDING},
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};
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@ -19,36 +20,40 @@ pub type Command = fn(view: &mut View, count: usize);
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pub fn move_char_left(view: &mut View, count: usize) {
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// TODO: use a transaction
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let selection = view
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.state
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.move_selection(Direction::Backward, Granularity::Character, count);
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view.state.selection = selection;
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let selection =
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view.doc
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.state
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.move_selection(Direction::Backward, Granularity::Character, count);
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view.doc.state.selection = selection;
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}
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pub fn move_char_right(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection =
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view.state
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view.doc.state.selection =
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view.doc
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.state
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.move_selection(Direction::Forward, Granularity::Character, count);
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}
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pub fn move_line_up(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection = view
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.state
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.move_selection(Direction::Backward, Granularity::Line, count);
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view.doc.state.selection =
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view.doc
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.state
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.move_selection(Direction::Backward, Granularity::Line, count);
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}
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pub fn move_line_down(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection = view
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.state
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.move_selection(Direction::Forward, Granularity::Line, count);
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view.doc.state.selection =
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view.doc
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.state
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.move_selection(Direction::Forward, Granularity::Line, count);
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}
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pub fn move_line_end(view: &mut View, _count: usize) {
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// TODO: use a transaction
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let lines = selection_lines(&view.state);
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let lines = selection_lines(&view.doc.state);
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let positions = lines
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.into_iter()
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@ -57,89 +62,89 @@ pub fn move_line_end(view: &mut View, _count: usize) {
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// Line end is pos at the start of next line - 1
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// subtract another 1 because the line ends with \n
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view.state.doc.line_to_char(index + 1).saturating_sub(2)
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view.doc.text().line_to_char(index + 1).saturating_sub(2)
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})
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.map(|pos| Range::new(pos, pos));
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let selection = Selection::new(positions.collect(), 0);
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let transaction = Transaction::new(&mut view.state).with_selection(selection);
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let transaction = Transaction::new(&mut view.doc.state).with_selection(selection);
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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pub fn move_line_start(view: &mut View, _count: usize) {
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let lines = selection_lines(&view.state);
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let lines = selection_lines(&view.doc.state);
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let positions = lines
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.into_iter()
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.map(|index| {
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// adjust all positions to the start of the line.
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view.state.doc.line_to_char(index)
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view.doc.text().line_to_char(index)
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})
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.map(|pos| Range::new(pos, pos));
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let selection = Selection::new(positions.collect(), 0);
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let transaction = Transaction::new(&mut view.state).with_selection(selection);
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let transaction = Transaction::new(&mut view.doc.state).with_selection(selection);
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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pub fn move_next_word_start(view: &mut View, count: usize) {
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let pos = view.state.move_pos(
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view.state.selection.cursor(),
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let pos = view.doc.state.move_pos(
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view.doc.state.selection.cursor(),
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Direction::Forward,
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Granularity::Word,
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count,
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);
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// TODO: use a transaction
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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pub fn move_prev_word_start(view: &mut View, count: usize) {
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let pos = view.state.move_pos(
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view.state.selection.cursor(),
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let pos = view.doc.state.move_pos(
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view.doc.state.selection.cursor(),
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Direction::Backward,
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Granularity::Word,
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count,
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);
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// TODO: use a transaction
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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pub fn move_next_word_end(view: &mut View, count: usize) {
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let pos = State::move_next_word_end(
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&view.state.doc().slice(..),
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view.state.selection.cursor(),
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&view.doc.text().slice(..),
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view.doc.state.selection.cursor(),
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count,
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);
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// TODO: use a transaction
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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pub fn move_file_start(view: &mut View, _count: usize) {
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// TODO: use a transaction
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view.state.selection = Selection::single(0, 0);
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view.doc.state.selection = Selection::single(0, 0);
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view.state.mode = Mode::Normal;
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view.doc.mode = Mode::Normal;
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}
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pub fn move_file_end(view: &mut View, _count: usize) {
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// TODO: use a transaction
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let text = &view.state.doc;
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let text = &view.doc.text();
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let last_line = text.line_to_char(text.len_lines().saturating_sub(2));
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view.state.selection = Selection::single(last_line, last_line);
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view.doc.state.selection = Selection::single(last_line, last_line);
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view.state.mode = Mode::Normal;
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view.doc.mode = Mode::Normal;
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}
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pub fn check_cursor_in_view(view: &mut View) -> bool {
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let cursor = view.state.selection().cursor();
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let line = view.state.doc().char_to_line(cursor);
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let cursor = view.doc.state.selection().cursor();
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let line = view.doc.text().char_to_line(cursor);
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let document_end = view.first_line + view.size.1.saturating_sub(1) as usize;
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if (line > document_end.saturating_sub(PADDING)) | (line < view.first_line + PADDING) {
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@ -156,19 +161,19 @@ pub fn page_up(view: &mut View, _count: usize) {
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view.first_line = view.first_line.saturating_sub(view.size.1 as usize);
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if !check_cursor_in_view(view) {
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let text = view.state.doc();
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let text = view.doc.text();
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let pos = text.line_to_char(view.last_line().saturating_sub(PADDING));
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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}
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pub fn page_down(view: &mut View, _count: usize) {
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view.first_line += view.size.1 as usize + PADDING;
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if view.first_line < view.state.doc().len_lines() {
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let text = view.state.doc();
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if view.first_line < view.doc.text().len_lines() {
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let text = view.doc.text();
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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}
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@ -180,79 +185,84 @@ pub fn half_page_up(view: &mut View, _count: usize) {
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view.first_line = view.first_line.saturating_sub(view.size.1 as usize / 2);
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if !check_cursor_in_view(view) {
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let text = &view.state.doc;
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let text = &view.doc.text();
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let pos = text.line_to_char(view.last_line() - PADDING);
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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}
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pub fn half_page_down(view: &mut View, _count: usize) {
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let lines = view.state.doc().len_lines();
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let lines = view.doc.text().len_lines();
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if view.first_line < lines.saturating_sub(view.size.1 as usize) {
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view.first_line += view.size.1 as usize / 2;
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}
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if !check_cursor_in_view(view) {
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let text = view.state.doc();
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let text = view.doc.text();
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(pos, pos);
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view.doc.state.selection = Selection::single(pos, pos);
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}
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}
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// avoid select by default by having a visual mode switch that makes movements into selects
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pub fn extend_char_left(view: &mut View, count: usize) {
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// TODO: use a transaction
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let selection = view
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.state
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.extend_selection(Direction::Backward, Granularity::Character, count);
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view.state.selection = selection;
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let selection =
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view.doc
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.state
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.extend_selection(Direction::Backward, Granularity::Character, count);
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view.doc.state.selection = selection;
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}
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pub fn extend_char_right(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection =
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view.state
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view.doc.state.selection =
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view.doc
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.state
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.extend_selection(Direction::Forward, Granularity::Character, count);
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}
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pub fn extend_line_up(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection =
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view.state
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view.doc.state.selection =
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view.doc
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.state
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.extend_selection(Direction::Backward, Granularity::Line, count);
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}
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pub fn extend_line_down(view: &mut View, count: usize) {
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// TODO: use a transaction
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view.state.selection =
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view.state
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view.doc.state.selection =
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view.doc
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.state
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.extend_selection(Direction::Forward, Granularity::Line, count);
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}
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pub fn split_selection_on_newline(view: &mut View, _count: usize) {
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let text = &view.state.doc.slice(..);
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let text = &view.doc.text().slice(..);
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// only compile the regex once
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#[allow(clippy::trivial_regex)]
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static REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\n").unwrap());
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// TODO: use a transaction
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view.state.selection = selection::split_on_matches(text, view.state.selection(), ®EX)
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view.doc.state.selection = selection::split_on_matches(text, view.doc.state.selection(), ®EX)
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}
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pub fn select_line(view: &mut View, _count: usize) {
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// TODO: count
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let pos = view.state.selection().primary();
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let text = view.state.doc();
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let pos = view.doc.state.selection().primary();
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let text = view.doc.text();
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let line = text.char_to_line(pos.head);
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let start = text.line_to_char(line);
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let end = text.line_to_char(line + 1).saturating_sub(1);
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// TODO: use a transaction
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view.state.selection = Selection::single(start, end);
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view.doc.state.selection = Selection::single(start, end);
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}
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pub fn delete_selection(view: &mut View, _count: usize) {
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let transaction =
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Transaction::change_by_selection(&view.state, |range| (range.from(), range.to() + 1, None));
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transaction.apply(&mut view.state);
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let transaction = Transaction::change_by_selection(&view.doc.state, |range| {
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(range.from(), range.to() + 1, None)
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});
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view.doc.apply(&transaction);
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append_changes_to_history(view);
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}
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@ -263,21 +273,23 @@ pub fn change_selection(view: &mut View, count: usize) {
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}
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pub fn collapse_selection(view: &mut View, _count: usize) {
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view.state.selection = view
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view.doc.state.selection = view
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.doc
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.state
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.selection
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.transform(|range| Range::new(range.head, range.head))
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}
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pub fn flip_selections(view: &mut View, _count: usize) {
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view.state.selection = view
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view.doc.state.selection = view
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.doc
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.state
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.selection
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.transform(|range| Range::new(range.head, range.anchor))
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}
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fn enter_insert_mode(view: &mut View) {
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view.state.mode = Mode::Insert;
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view.doc.mode = Mode::Insert;
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append_changes_to_history(view);
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}
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@ -285,7 +297,8 @@ fn enter_insert_mode(view: &mut View) {
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pub fn insert_mode(view: &mut View, _count: usize) {
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enter_insert_mode(view);
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view.state.selection = view
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view.doc.state.selection = view
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.doc
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.state
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.selection
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.transform(|range| Range::new(range.to(), range.from()))
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@ -294,11 +307,11 @@ pub fn insert_mode(view: &mut View, _count: usize) {
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// inserts at the end of each selection
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pub fn append_mode(view: &mut View, _count: usize) {
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enter_insert_mode(view);
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view.state.restore_cursor = true;
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view.doc.restore_cursor = true;
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// TODO: as transaction
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let text = &view.state.doc.slice(..);
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view.state.selection = view.state.selection.transform(|range| {
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let text = &view.doc.text().slice(..);
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view.doc.state.selection = view.doc.state.selection.transform(|range| {
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// TODO: to() + next char
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Range::new(
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range.from(),
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@ -346,13 +359,13 @@ pub fn append_to_line(view: &mut View, count: usize) {
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pub fn open_below(view: &mut View, _count: usize) {
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enter_insert_mode(view);
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let lines = selection_lines(&view.state);
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let lines = selection_lines(&view.doc.state);
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let positions: Vec<_> = lines
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.into_iter()
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.map(|index| {
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// adjust all positions to the end of the line/start of the next one.
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view.state.doc.line_to_char(index + 1)
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view.doc.text().line_to_char(index + 1)
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})
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.collect();
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@ -373,63 +386,63 @@ pub fn open_below(view: &mut View, _count: usize) {
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0,
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);
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let transaction = Transaction::change(&view.state, changes).with_selection(selection);
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let transaction = Transaction::change(&view.doc.state, changes).with_selection(selection);
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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// O inserts a new line before each line with a selection
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fn append_changes_to_history(view: &mut View) {
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if view.state.changes.is_empty() {
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if view.doc.changes.is_empty() {
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return;
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}
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let new_changeset = ChangeSet::new(view.state.doc());
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let changes = std::mem::replace(&mut view.state.changes, new_changeset);
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let new_changeset = ChangeSet::new(view.doc.text());
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let changes = std::mem::replace(&mut view.doc.changes, new_changeset);
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// Instead of doing this messy merge we could always commit, and based on transaction
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// annotations either add a new layer or compose into the previous one.
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let transaction = Transaction::from(changes).with_selection(view.state.selection().clone());
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let transaction = Transaction::from(changes).with_selection(view.doc.state.selection().clone());
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// increment document version
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// TODO: needs to happen on undo/redo too
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view.state.version += 1;
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view.doc.version += 1;
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// TODO: trigger lsp/documentDidChange with changes
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// HAXX: we need to reconstruct the state as it was before the changes..
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let (doc, selection) = view.state.old_state.take().unwrap();
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let (doc, selection) = view.doc.old_state.take().unwrap();
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let mut old_state = State::new(doc);
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old_state.selection = selection;
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// TODO: take transaction by value?
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view.history.commit_revision(&transaction, &old_state);
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view.doc.history.commit_revision(&transaction, &old_state);
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// HAXX
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view.state.old_state = Some((view.state.doc().clone(), view.state.selection.clone()));
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view.doc.old_state = Some((view.doc.text().clone(), view.doc.state.selection.clone()));
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}
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pub fn normal_mode(view: &mut View, _count: usize) {
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view.state.mode = Mode::Normal;
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view.doc.mode = Mode::Normal;
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append_changes_to_history(view);
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// if leaving append mode, move cursor back by 1
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if view.state.restore_cursor {
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let text = &view.state.doc.slice(..);
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view.state.selection = view.state.selection.transform(|range| {
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if view.doc.restore_cursor {
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let text = &view.doc.text().slice(..);
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view.doc.state.selection = view.doc.state.selection.transform(|range| {
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Range::new(
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range.from(),
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graphemes::prev_grapheme_boundary(text, range.to()),
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)
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});
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view.state.restore_cursor = false;
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view.doc.restore_cursor = false;
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}
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}
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pub fn goto_mode(view: &mut View, _count: usize) {
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view.state.mode = Mode::Goto;
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view.doc.mode = Mode::Goto;
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}
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// NOTE: Transactions in this module get appended to history when we switch back to normal mode.
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@ -438,9 +451,9 @@ pub mod insert {
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// TODO: insert means add text just before cursor, on exit we should be on the last letter.
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pub fn insert_char(view: &mut View, c: char) {
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let c = Tendril::from_char(c);
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let transaction = Transaction::insert(&view.state, c);
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let transaction = Transaction::insert(&view.doc.state, c);
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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pub fn insert_tab(view: &mut View, _count: usize) {
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@ -448,41 +461,44 @@ pub mod insert {
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}
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pub fn insert_newline(view: &mut View, _count: usize) {
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let transaction = Transaction::change_by_selection(&view.state, |range| {
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let indent_level =
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helix_core::indent::suggested_indent_for_pos(&view.state, range.head);
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let transaction = Transaction::change_by_selection(&view.doc.state, |range| {
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let indent_level = helix_core::indent::suggested_indent_for_pos(
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view.doc.syntax.as_ref(),
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&view.doc.state,
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range.head,
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);
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let indent = " ".repeat(TAB_WIDTH).repeat(indent_level);
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let mut text = String::with_capacity(1 + indent.len());
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text.push('\n');
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text.push_str(&indent);
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(range.head, range.head, Some(text.into()))
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});
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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// TODO: handle indent-aware delete
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pub fn delete_char_backward(view: &mut View, count: usize) {
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let text = &view.state.doc.slice(..);
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let transaction = Transaction::change_by_selection(&view.state, |range| {
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let text = &view.doc.text().slice(..);
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let transaction = Transaction::change_by_selection(&view.doc.state, |range| {
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(
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graphemes::nth_prev_grapheme_boundary(text, range.head, count),
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range.head,
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None,
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)
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});
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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pub fn delete_char_forward(view: &mut View, count: usize) {
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let text = &view.state.doc.slice(..);
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let transaction = Transaction::change_by_selection(&view.state, |range| {
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let text = &view.doc.text().slice(..);
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let transaction = Transaction::change_by_selection(&view.doc.state, |range| {
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(
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range.head,
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graphemes::nth_next_grapheme_boundary(text, range.head, count),
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None,
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)
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});
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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}
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}
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@ -493,13 +509,13 @@ pub fn insert_char_prompt(prompt: &mut Prompt, c: char) {
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// Undo / Redo
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pub fn undo(view: &mut View, _count: usize) {
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view.history.undo(&mut view.state);
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view.doc.history.undo(&mut view.doc.state);
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// TODO: each command could simply return a Option<transaction>, then the higher level handles storing it?
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}
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pub fn redo(view: &mut View, _count: usize) {
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view.history.redo(&mut view.state);
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view.doc.history.redo(&mut view.doc.state);
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}
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// Yank / Paste
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@ -507,9 +523,10 @@ pub fn redo(view: &mut View, _count: usize) {
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pub fn yank(view: &mut View, _count: usize) {
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// TODO: should selections be made end inclusive?
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let values = view
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.doc
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.state
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.selection()
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.fragments(&view.state.doc().slice(..))
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.fragments(&view.doc.text().slice(..))
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.map(|cow| cow.into_owned())
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.collect();
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@ -550,18 +567,18 @@ pub fn paste(view: &mut View, _count: usize) {
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let transaction = if linewise {
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// paste on the next line
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// TODO: can simply take a range + modifier and compute the right pos without ifs
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let text = view.state.doc();
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Transaction::change_by_selection(&view.state, |range| {
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let text = view.doc.text();
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Transaction::change_by_selection(&view.doc.state, |range| {
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let line_end = text.line_to_char(text.char_to_line(range.head) + 1);
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(line_end, line_end, Some(values.next().unwrap()))
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})
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} else {
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Transaction::change_by_selection(&view.state, |range| {
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Transaction::change_by_selection(&view.doc.state, |range| {
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(range.head + 1, range.head + 1, Some(values.next().unwrap()))
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})
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};
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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append_changes_to_history(view);
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}
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}
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@ -570,9 +587,9 @@ fn get_lines(view: &View) -> Vec<usize> {
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let mut lines = Vec::new();
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// Get all line numbers
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for range in view.state.selection.ranges() {
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let start = view.state.doc.char_to_line(range.from());
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let end = view.state.doc.char_to_line(range.to());
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for range in view.doc.state.selection.ranges() {
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let start = view.doc.text().char_to_line(range.from());
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let end = view.doc.text().char_to_line(range.to());
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for line in start..=end {
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lines.push(line)
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@ -590,13 +607,13 @@ pub fn indent(view: &mut View, _count: usize) {
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let indent = Tendril::from(" ".repeat(TAB_WIDTH));
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let transaction = Transaction::change(
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&view.state,
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&view.doc.state,
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lines.into_iter().map(|line| {
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let pos = view.state.doc.line_to_char(line);
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let pos = view.doc.text().line_to_char(line);
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(pos, pos, Some(indent.clone()))
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}),
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);
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transaction.apply(&mut view.state);
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view.doc.apply(&transaction);
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append_changes_to_history(view);
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}
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@ -605,7 +622,7 @@ pub fn unindent(view: &mut View, _count: usize) {
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let mut changes = Vec::with_capacity(lines.len());
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for line_idx in lines {
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let line = view.state.doc.line(line_idx);
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let line = view.doc.text().line(line_idx);
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let mut width = 0;
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for ch in line.chars() {
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@ -621,14 +638,14 @@ pub fn unindent(view: &mut View, _count: usize) {
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}
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if width > 0 {
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let start = view.state.doc.line_to_char(line_idx);
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let start = view.doc.text().line_to_char(line_idx);
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changes.push((start, start + width, None))
|
|
|
|
|
}
|
|
|
|
|
}
|
|
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|
|
|
|
|
|
|
let transaction = Transaction::change(&view.state, changes.into_iter());
|
|
|
|
|
let transaction = Transaction::change(&view.doc.state, changes.into_iter());
|
|
|
|
|
|
|
|
|
|
transaction.apply(&mut view.state);
|
|
|
|
|
view.doc.apply(&transaction);
|
|
|
|
|
append_changes_to_history(view);
|
|
|
|
|
}
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|
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