Command needs access to view information for certain changes.

pull/1/head
Blaž Hrastnik 4 years ago
parent 1303ffd94a
commit 48330ddb5f

@ -1,5 +1,4 @@
#![allow(unused)]
pub mod commands;
pub mod graphemes;
mod position;
mod selection;
@ -11,7 +10,7 @@ pub use ropey::{Rope, RopeSlice};
pub use tendril::StrTendril as Tendril;
pub use position::Position;
pub use selection::Range as SelectionRange;
pub use selection::Range;
pub use selection::Selection;
pub use syntax::Syntax;

@ -1,5 +1,5 @@
use crate::graphemes::{nth_next_grapheme_boundary, nth_prev_grapheme_boundary, RopeGraphemes};
use crate::{Position, Rope, RopeSlice, Selection, SelectionRange, Syntax};
use crate::{Position, Range, Rope, RopeSlice, Selection, Syntax};
use anyhow::Error;
use std::path::PathBuf;
@ -12,11 +12,12 @@ pub enum Mode {
/// A state represents the current editor state of a single buffer.
pub struct State {
// TODO: fields should be private but we need to refactor commands.rs first
/// Path to file on disk.
pub(crate) path: Option<PathBuf>,
pub(crate) doc: Rope,
pub(crate) selection: Selection,
pub(crate) mode: Mode,
pub path: Option<PathBuf>,
pub doc: Rope,
pub selection: Selection,
pub mode: Mode,
//
pub syntax: Option<Syntax>,
@ -189,7 +190,7 @@ impl State {
// } else {
let pos = self.move_pos(range.head, dir, granularity, count);
// };
SelectionRange::new(pos, pos)
Range::new(pos, pos)
})
}
@ -201,7 +202,7 @@ impl State {
) -> Selection {
self.selection.transform(|range| {
let pos = self.move_pos(range.head, dir, granularity, count);
SelectionRange::new(range.anchor, pos)
Range::new(range.anchor, pos)
})
}
}

@ -1,4 +1,4 @@
use crate::{Rope, Selection, SelectionRange, State, Tendril};
use crate::{Range, Rope, Selection, State, Tendril};
/// (from, to, replacement)
pub type Change = (usize, usize, Option<Tendril>);
@ -387,7 +387,7 @@ impl Transaction {
/// Generate a transaction with a change per selection range.
pub fn change_by_selection<F>(state: &State, f: F) -> Self
where
F: Fn(&SelectionRange) -> Change,
F: Fn(&Range) -> Change,
{
Self::change(state, state.selection.ranges().iter().map(f))
}

@ -1,32 +1,42 @@
use crate::graphemes;
use crate::selection::{Range, Selection};
use crate::state::{Direction, Granularity, Mode, State};
use crate::transaction::{ChangeSet, Transaction};
use crate::Tendril;
use helix_core::{
graphemes,
state::{Direction, Granularity, Mode, State},
ChangeSet, Range, Selection, Tendril, Transaction,
};
use crate::editor::View;
/// 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).
pub type Command = fn(state: &mut State, count: usize);
pub type Command = fn(view: &mut View, count: usize);
pub fn move_char_left(state: &mut State, count: usize) {
pub fn move_char_left(view: &mut View, count: usize) {
// TODO: use a transaction
let selection = state.move_selection(Direction::Backward, Granularity::Character, count);
state.selection = selection;
let selection = view
.state
.move_selection(Direction::Backward, Granularity::Character, count);
view.state.selection = selection;
}
pub fn move_char_right(state: &mut State, count: usize) {
pub fn move_char_right(view: &mut View, count: usize) {
// TODO: use a transaction
state.selection = state.move_selection(Direction::Forward, Granularity::Character, count);
view.state.selection =
view.state
.move_selection(Direction::Forward, Granularity::Character, count);
}
pub fn move_line_up(state: &mut State, count: usize) {
pub fn move_line_up(view: &mut View, count: usize) {
// TODO: use a transaction
state.selection = state.move_selection(Direction::Backward, Granularity::Line, count);
view.state.selection = view
.state
.move_selection(Direction::Backward, Granularity::Line, count);
}
pub fn move_line_down(state: &mut State, count: usize) {
pub fn move_line_down(view: &mut View, count: usize) {
// TODO: use a transaction
state.selection = state.move_selection(Direction::Forward, Granularity::Line, count);
view.state.selection = view
.state
.move_selection(Direction::Forward, Granularity::Line, count);
}
// avoid select by default by having a visual mode switch that makes movements into selects
@ -37,21 +47,22 @@ pub fn move_line_down(state: &mut State, count: usize) {
// lastly, if it was append mode we shift cursor by 1?
// inserts at the start of each selection
pub fn insert_mode(state: &mut State, _count: usize) {
state.mode = Mode::Insert;
pub fn insert_mode(view: &mut View, _count: usize) {
view.state.mode = Mode::Insert;
state.selection = state
view.state.selection = view
.state
.selection
.transform(|range| Range::new(range.to(), range.from()))
}
// inserts at the end of each selection
pub fn append_mode(state: &mut State, _count: usize) {
state.mode = Mode::Insert;
pub fn append_mode(view: &mut View, _count: usize) {
view.state.mode = Mode::Insert;
// TODO: as transaction
let text = &state.doc.slice(..);
state.selection = state.selection.transform(|range| {
let text = &view.state.doc.slice(..);
view.state.selection = view.state.selection.transform(|range| {
// TODO: to() + next char
Range::new(
range.from(),
@ -78,63 +89,63 @@ fn selection_lines(state: &State) -> Vec<usize> {
}
// I inserts at the start of each line with a selection
pub fn prepend_to_line(state: &mut State, _count: usize) {
state.mode = Mode::Insert;
pub fn prepend_to_line(view: &mut View, _count: usize) {
view.state.mode = Mode::Insert;
let lines = selection_lines(state);
let lines = selection_lines(&view.state);
let positions = lines
.into_iter()
.map(|index| {
// adjust all positions to the start of the line.
state.doc.line_to_char(index)
view.state.doc.line_to_char(index)
})
.map(|pos| Range::new(pos, pos));
let selection = Selection::new(positions.collect(), 0);
let transaction = Transaction::new(state).with_selection(selection);
let transaction = Transaction::new(&mut view.state).with_selection(selection);
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}
// A inserts at the end of each line with a selection
pub fn append_to_line(state: &mut State, _count: usize) {
state.mode = Mode::Insert;
pub fn append_to_line(view: &mut View, _count: usize) {
view.state.mode = Mode::Insert;
let lines = selection_lines(state);
let lines = selection_lines(&view.state);
let positions = lines
.into_iter()
.map(|index| {
// adjust all positions to the end of the line.
let line = state.doc.line(index);
let line_start = state.doc.line_to_char(index);
let line = view.state.doc.line(index);
let line_start = view.state.doc.line_to_char(index);
line_start + line.len_chars() - 1
})
.map(|pos| Range::new(pos, pos));
let selection = Selection::new(positions.collect(), 0);
let transaction = Transaction::new(state).with_selection(selection);
let transaction = Transaction::new(&mut view.state).with_selection(selection);
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}
// o inserts a new line after each line with a selection
pub fn open_below(state: &mut State, _count: usize) {
state.mode = Mode::Insert;
pub fn open_below(view: &mut View, _count: usize) {
view.state.mode = Mode::Insert;
let lines = selection_lines(state);
let lines = selection_lines(&view.state);
let positions: Vec<_> = lines
.into_iter()
.map(|index| {
// adjust all positions to the end of the line.
let line = state.doc.line(index);
let line_start = state.doc.line_to_char(index);
let line = view.state.doc.line(index);
let line_start = view.state.doc.line_to_char(index);
line_start + line.len_chars()
})
.collect();
@ -155,51 +166,51 @@ pub fn open_below(state: &mut State, _count: usize) {
0,
);
let transaction = Transaction::change(state, changes).with_selection(selection);
let transaction = Transaction::change(&view.state, changes).with_selection(selection);
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}
// O inserts a new line before each line with a selection
pub fn normal_mode(state: &mut State, _count: usize) {
pub fn normal_mode(view: &mut View, _count: usize) {
// TODO: if leaving append mode, move cursor back by 1
state.mode = Mode::Normal;
view.state.mode = Mode::Normal;
}
// TODO: insert means add text just before cursor, on exit we should be on the last letter.
pub fn insert_char(state: &mut State, c: char) {
pub fn insert_char(view: &mut View, c: char) {
let c = Tendril::from_char(c);
let transaction = Transaction::insert(&state, c);
let transaction = Transaction::insert(&view.state, c);
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}
// TODO: handle indent-aware delete
pub fn delete_char_backward(state: &mut State, count: usize) {
let text = &state.doc.slice(..);
let transaction = Transaction::change_by_selection(state, |range| {
pub fn delete_char_backward(view: &mut View, count: usize) {
let text = &view.state.doc.slice(..);
let transaction = Transaction::change_by_selection(&view.state, |range| {
(
graphemes::nth_prev_grapheme_boundary(text, range.head, count),
range.head,
None,
)
});
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}
pub fn delete_char_forward(state: &mut State, count: usize) {
let text = &state.doc.slice(..);
let transaction = Transaction::change_by_selection(state, |range| {
pub fn delete_char_forward(view: &mut View, count: usize) {
let text = &view.state.doc.slice(..);
let transaction = Transaction::change_by_selection(&view.state, |range| {
(
graphemes::nth_next_grapheme_boundary(text, range.head, count),
range.head,
None,
)
});
transaction.apply(state);
transaction.apply(&mut view.state);
// TODO: need to store into history if successful
}

@ -1,4 +1,4 @@
use crate::{keymap, theme::Theme, Args};
use crate::{commands, keymap, theme::Theme, Args};
use helix_core::{
state::coords_at_pos,
state::Mode,
@ -31,10 +31,15 @@ type Terminal = tui::Terminal<CrosstermBackend<std::io::Stdout>>;
static EX: smol::Executor = smol::Executor::new();
pub struct View {
pub state: State,
pub first_line: u16,
pub size: (u16, u16),
}
pub struct Editor {
terminal: Terminal,
state: Option<State>,
first_line: u16,
view: Option<View>,
size: (u16, u16),
surface: Surface,
cache: Surface,
@ -52,8 +57,7 @@ impl Editor {
let mut editor = Editor {
terminal,
state: None,
first_line: 0,
view: None,
size,
surface: Surface::empty(area),
cache: Surface::empty(area),
@ -75,7 +79,14 @@ impl Editor {
.as_mut()
.unwrap()
.configure(self.theme.scopes());
self.state = Some(state);
let view = View {
state,
first_line: 0,
size: self.size,
};
self.view = Some(view);
Ok(())
}
@ -83,8 +94,8 @@ impl Editor {
use tui::backend::Backend;
use tui::style::Color;
// TODO: ideally not mut but highlights require it because of cursor cache
match &mut self.state {
Some(state) => {
match &mut self.view {
Some(view) => {
let area = Rect::new(0, 0, self.size.0, self.size.1);
let mut stdout = stdout();
self.surface.reset(); // reset is faster than allocating new empty surface
@ -97,18 +108,18 @@ impl Editor {
let viewport = Rect::new(offset, 0, self.size.0, self.size.1 - 1); // - 1 for statusline
// TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset, pos|)
let source_code = state.doc().to_string();
let source_code = view.state.doc().to_string();
let last_line = std::cmp::min(
(self.first_line + viewport.height - 1) as usize,
state.doc().len_lines() - 1,
(view.first_line + viewport.height - 1) as usize,
view.state.doc().len_lines() - 1,
);
let range = {
// calculate viewport byte ranges
let start = state.doc().line_to_byte(self.first_line.into());
let end = state.doc().line_to_byte(last_line)
+ state.doc().line(last_line).len_bytes();
let start = view.state.doc().line_to_byte(view.first_line.into());
let end = view.state.doc().line_to_byte(last_line)
+ view.state.doc().line(last_line).len_bytes();
start..end
};
@ -117,7 +128,8 @@ impl Editor {
// TODO: cache highlight results
// TODO: only recalculate when state.doc is actually modified
let highlights: Vec<_> = state
let highlights: Vec<_> = view
.state
.syntax
.as_mut()
.unwrap()
@ -141,10 +153,10 @@ impl Editor {
HighlightEvent::Source { start, end } => {
// TODO: filter out spans out of viewport for now..
let start = state.doc().byte_to_char(start);
let end = state.doc().byte_to_char(end);
let start = view.state.doc().byte_to_char(start);
let end = view.state.doc().byte_to_char(end);
let text = state.doc().slice(start..end);
let text = view.state.doc().slice(start..end);
use helix_core::graphemes::{grapheme_width, RopeGraphemes};
@ -191,7 +203,7 @@ impl Editor {
let mut line = 0;
let style = self.theme.get("ui.linenr");
for i in self.first_line..(last_line as u16) {
for i in view.first_line..(last_line as u16) {
self.surface
.set_stringn(0, line, format!("{:>5}", i + 1), 5, style); // lavender
line += 1;
@ -223,7 +235,7 @@ impl Editor {
// }
// statusline
let mode = match state.mode() {
let mode = match view.state.mode() {
Mode::Insert => "INS",
Mode::Normal => "NOR",
};
@ -235,7 +247,7 @@ impl Editor {
let text_color = Style::default().fg(Color::Rgb(219, 191, 239)); // lilac
self.surface
.set_string(1, self.size.1 - 1, mode, text_color);
if let Some(path) = state.path() {
if let Some(path) = view.state.path() {
self.surface
.set_string(6, self.size.1 - 1, path.to_string_lossy(), text_color);
}
@ -247,19 +259,19 @@ impl Editor {
std::mem::swap(&mut self.surface, &mut self.cache);
// set cursor shape
match state.mode() {
match view.state.mode() {
Mode::Insert => write!(stdout, "\x1B[6 q"),
Mode::Normal => write!(stdout, "\x1B[2 q"),
};
// render the cursor
let pos = state.selection().cursor();
let coords = coords_at_pos(&state.doc().slice(..), pos);
let pos = view.state.selection().cursor();
let coords = coords_at_pos(&view.state.doc().slice(..), pos);
execute!(
stdout,
cursor::MoveTo(
coords.col as u16 + viewport.x,
coords.row as u16 - self.first_line + viewport.y,
coords.row as u16 - view.first_line + viewport.y,
)
);
}
@ -295,29 +307,29 @@ impl Editor {
break;
}
Some(Ok(Event::Key(event))) => {
if let Some(state) = &mut self.state {
match state.mode() {
if let Some(view) = &mut self.view {
match view.state.mode() {
Mode::Insert => {
match event {
KeyEvent {
code: KeyCode::Esc, ..
} => helix_core::commands::normal_mode(state, 1),
} => commands::normal_mode(view, 1),
KeyEvent {
code: KeyCode::Backspace,
..
} => helix_core::commands::delete_char_backward(state, 1),
} => commands::delete_char_backward(view, 1),
KeyEvent {
code: KeyCode::Delete,
..
} => helix_core::commands::delete_char_forward(state, 1),
} => commands::delete_char_forward(view, 1),
KeyEvent {
code: KeyCode::Char(c),
..
} => helix_core::commands::insert_char(state, c),
} => commands::insert_char(view, c),
KeyEvent {
code: KeyCode::Enter,
..
} => helix_core::commands::insert_char(state, '\n'),
} => commands::insert_char(view, '\n'),
_ => (), // skip
}
// TODO: simplistic ensure cursor in view for now
@ -329,7 +341,7 @@ impl Editor {
// TODO: handle modes and sequences (`gg`)
if let Some(command) = keymap.get(&event) {
// TODO: handle count other than 1
command(state, 1);
command(view, 1);
// TODO: simplistic ensure cursor in view for now
self.ensure_cursor_in_view();
@ -350,10 +362,10 @@ impl Editor {
}
fn ensure_cursor_in_view(&mut self) {
if let Some(state) = &mut self.state {
let cursor = state.selection().cursor();
let line = state.doc().char_to_line(cursor) as u16;
let document_end = self.first_line + self.size.1.saturating_sub(1) - 1;
if let Some(view) = &mut self.view {
let cursor = view.state.selection().cursor();
let line = view.state.doc().char_to_line(cursor) as u16;
let document_end = view.first_line + self.size.1.saturating_sub(1) - 1;
let padding = 5u16;
@ -361,10 +373,10 @@ impl Editor {
if line > document_end.saturating_sub(padding) {
// scroll down
self.first_line += line - (document_end.saturating_sub(padding));
} else if line < self.first_line + padding {
view.first_line += line - (document_end.saturating_sub(padding));
} else if line < view.first_line + padding {
// scroll up
self.first_line = line.saturating_sub(padding);
view.first_line = line.saturating_sub(padding);
}
}
}

@ -1,9 +1,9 @@
use crate::commands::{self, Command};
use crossterm::{
event::{KeyCode, KeyEvent as Key, KeyModifiers as Modifiers},
execute,
style::Print,
};
use helix_core::commands::{self, Command};
use std::collections::HashMap;
// Kakoune-inspired:

@ -1,6 +1,8 @@
#![allow(unused)]
#[macro_use]
mod macros;
mod commands;
mod editor;
mod keymap;
mod theme;

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