Command needs access to view information for certain changes.

4 files changed, 11 insertions, 216 deletions

diff --git a/helix-core/src/commands.rs b/helix-core/src/commands.rs
deleted file mode 100644
index 6c09c3ad..00000000
--- a/helix-core/src/commands.rs
+++ /dev/null
@@ -1,205 +0,0 @@
-use crate::graphemes;
-use crate::selection::{Range, Selection};
-use crate::state::{Direction, Granularity, Mode, State};
-use crate::transaction::{ChangeSet, Transaction};
-use crate::Tendril;
-
-/// 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 fn move_char_left(state: &mut State, count: usize) {
-    // TODO: use a transaction
-    let selection = state.move_selection(Direction::Backward, Granularity::Character, count);
-    state.selection = selection;
-}
-
-pub fn move_char_right(state: &mut State, count: usize) {
-    // TODO: use a transaction
-    state.selection = state.move_selection(Direction::Forward, Granularity::Character, count);
-}
-
-pub fn move_line_up(state: &mut State, count: usize) {
-    // TODO: use a transaction
-    state.selection = state.move_selection(Direction::Backward, Granularity::Line, count);
-}
-
-pub fn move_line_down(state: &mut State, count: usize) {
-    // TODO: use a transaction
-    state.selection = state.move_selection(Direction::Forward, Granularity::Line, count);
-}
-
-// avoid select by default by having a visual mode switch that makes movements into selects
-
-// insert mode:
-// first we calculate the correct cursors/selections
-// then we just append at each cursor
-// 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;
-
-    state.selection = 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;
-
-    // TODO: as transaction
-    let text = &state.doc.slice(..);
-    state.selection = state.selection.transform(|range| {
-        // TODO: to() + next char
-        Range::new(
-            range.from(),
-            graphemes::next_grapheme_boundary(text, range.to()),
-        )
-    })
-}
-
-// TODO: I, A, o and O can share a lot of the primitives.
-
-// calculate line numbers for each selection range
-fn selection_lines(state: &State) -> Vec<usize> {
-    let mut lines = state
-        .selection
-        .ranges()
-        .iter()
-        .map(|range| state.doc.char_to_line(range.head))
-        .collect::<Vec<_>>();
-
-    lines.sort();
-    lines.dedup();
-
-    lines
-}
-
-// 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;
-
-    let lines = selection_lines(state);
-
-    let positions = lines
-        .into_iter()
-        .map(|index| {
-            // adjust all positions to the start of the line.
-            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);
-
-    transaction.apply(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;
-
-    let lines = selection_lines(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);
-            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);
-
-    transaction.apply(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;
-
-    let lines = selection_lines(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);
-            line_start + line.len_chars()
-        })
-        .collect();
-
-    let changes = positions.iter().copied().map(|index|
-        // generate changes
-        (index, index, Some(Tendril::from_char('\n'))));
-
-    // TODO: count actually inserts "n" new lines and starts editing on all of them.
-    // TODO: append "count" newlines and modify cursors to those lines
-
-    let selection = Selection::new(
-        positions
-            .iter()
-            .copied()
-            .map(|pos| Range::new(pos, pos))
-            .collect(),
-        0,
-    );
-
-    let transaction = Transaction::change(state, changes).with_selection(selection);
-
-    transaction.apply(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) {
-    // TODO: if leaving append mode, move cursor back by 1
-    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) {
-    let c = Tendril::from_char(c);
-    let transaction = Transaction::insert(&state, c);
-
-    transaction.apply(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| {
-        (
-            graphemes::nth_prev_grapheme_boundary(text, range.head, count),
-            range.head,
-            None,
-        )
-    });
-    transaction.apply(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| {
-        (
-            graphemes::nth_next_grapheme_boundary(text, range.head, count),
-            range.head,
-            None,
-        )
-    });
-    transaction.apply(state);
-    // TODO: need to store into history if successful
-}
diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs
index 8c58d734..c617fdbf 100644
--- a/helix-core/src/lib.rs
+++ b/helix-core/src/lib.rs
@@ -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;
 
diff --git a/helix-core/src/state.rs b/helix-core/src/state.rs
index 55ac5095..5b5f06c0 100644
--- a/helix-core/src/state.rs
+++ b/helix-core/src/state.rs
@@ -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)
         })
     }
 }
diff --git a/helix-core/src/transaction.rs b/helix-core/src/transaction.rs
index f6fbddf8..127cdaee 100644
--- a/helix-core/src/transaction.rs
+++ b/helix-core/src/transaction.rs
@@ -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))
     }