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71 lines
2.0 KiB
Rust
71 lines
2.0 KiB
Rust
use crate::state::{Direction, Granularity, Mode, State};
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/// A command is a function that takes the current state and a count, and does a side-effect on the
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/// state (usually by creating and applying a transaction).
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pub type Command = fn(state: &mut State, count: usize);
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pub fn move_char_left(state: &mut State, count: usize) {
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// TODO: use a transaction
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let selection = state.move_selection(
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// TODO: remove the clone here
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state.selection.clone(),
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Direction::Backward,
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Granularity::Character,
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count,
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);
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state.selection = selection;
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}
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pub fn move_char_right(state: &mut State, count: usize) {
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// TODO: use a transaction
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state.selection = state.move_selection(
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// TODO: remove the clone here
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state.selection.clone(),
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Direction::Forward,
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Granularity::Character,
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count,
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);
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}
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pub fn move_line_up(state: &mut State, count: usize) {
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// TODO: use a transaction
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state.selection = state.move_selection(
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// TODO: remove the clone here
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state.selection.clone(),
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Direction::Backward,
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Granularity::Line,
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count,
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);
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}
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pub fn move_line_down(state: &mut State, count: usize) {
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// TODO: use a transaction
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state.selection = state.move_selection(
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// TODO: remove the clone here
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state.selection.clone(),
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Direction::Forward,
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Granularity::Line,
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count,
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);
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}
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pub fn insert_mode(state: &mut State, _count: usize) {
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state.mode = Mode::Insert;
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}
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pub fn normal_mode(state: &mut State, _count: usize) {
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state.mode = Mode::Normal;
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}
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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(state: &mut State, c: char) {
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// TODO: needs to work with multiple cursors
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use crate::transaction::ChangeSet;
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let pos = state.selection.primary().head;
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let changes = ChangeSet::insert(&state.doc, pos, c);
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// TODO: need to store history
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changes.apply(&mut state.doc);
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state.selection = state.selection.clone().map(&changes);
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}
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