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Enforce cursor/selection invariants in one place.

Browse Source 
Rather than per-command like before.
pull/376/head
Nathan Vegdahl 3 years ago
parent a873e719d5
commit cd7302ffd3
3 changed files with 77 additions and 115 deletions
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13
helix-core/src/selection.rs
Unescape Escape View File

@ -455,13 +455,18 @@ impl Selection {
for range in self.ranges.iter_mut() { for range in self.ranges.iter_mut() {
*range = f(*range) *range = f(*range)
} }
self.normalize() self.normalize()
} }
/// A convenience short-cut for `transform(|r| r.min_width_1(text))`. // Ensures the selection adheres to the following invariants:
pub fn min_width_1(self, text: RopeSlice) -> Self { // 1. All ranges are grapheme aligned.
self.transform(|r| r.min_width_1(text)) // 2. All ranges are at least 1 character wide, unless at the
// very end of the document.
// 3. Ranges are non-overlapping.
// 4. Ranges are sorted by their position in the text.
pub fn ensure_invariants(self, text: RopeSlice) -> Self {
self.transform(|r| r.min_width_1(text).grapheme_aligned(text))
.normalize()
} }
/// Transforms the selection into all of the left-side head positions, /// Transforms the selection into all of the left-side head positions,

169
helix-term/src/commands.rs
Unescape Escape View File

@ -483,7 +483,6 @@ fn move_next_word_start(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_next_word_start(text, range, count)); .transform(|range| movement::move_next_word_start(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -496,7 +495,6 @@ fn move_prev_word_start(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_prev_word_start(text, range, count)); .transform(|range| movement::move_prev_word_start(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -509,7 +507,6 @@ fn move_next_word_end(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_next_word_end(text, range, count)); .transform(|range| movement::move_next_word_end(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -522,7 +519,6 @@ fn move_next_long_word_start(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_next_long_word_start(text, range, count)); .transform(|range| movement::move_next_long_word_start(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -535,7 +531,6 @@ fn move_prev_long_word_start(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_prev_long_word_start(text, range, count)); .transform(|range| movement::move_prev_long_word_start(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -548,7 +543,6 @@ fn move_next_long_word_end(cx: &mut Context) {
let selection = doc let selection = doc
.selection(view.id) .selection(view.id)
.clone() .clone()
.min_width_1(text)
.transform(|range| movement::move_next_long_word_end(text, range, count)); .transform(|range| movement::move_next_long_word_end(text, range, count));
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -574,15 +568,11 @@ fn extend_next_word_start(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc let selection = doc.selection(view.id).clone().transform(|range| {
.selection(view.id) let word = movement::move_next_word_start(text, range, count);
.clone() let pos = word.cursor(text);
.min_width_1(text) range.put_cursor(text, pos, true)
.transform(|range| { });
let word = movement::move_next_word_start(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -591,15 +581,11 @@ fn extend_prev_word_start(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc let selection = doc.selection(view.id).clone().transform(|range| {
.selection(view.id) let word = movement::move_prev_word_start(text, range, count);
.clone() let pos = word.cursor(text);
.min_width_1(text) range.put_cursor(text, pos, true)
.transform(|range| { });
let word = movement::move_prev_word_start(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -608,15 +594,11 @@ fn extend_next_word_end(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc let selection = doc.selection(view.id).clone().transform(|range| {
.selection(view.id) let word = movement::move_next_word_end(text, range, count);
.clone() let pos = word.cursor(text);
.min_width_1(text) range.put_cursor(text, pos, true)
.transform(|range| { });
let word = movement::move_next_word_end(text, range, count);
let pos = word.cursor(text);
range.put_cursor(text, pos, true)
});
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
} }
@ -663,13 +645,16 @@ where
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().transform(|range| { let selection = doc.selection(view.id).clone().transform(|range| {
let range = if range.anchor < range.head { // TODO: use `Range::cursor()` here instead. However, that works in terms of
// For block-cursor semantics. // graphemes, wheras this function does yet. So we're doing the same logic
Range::new(range.anchor, range.head - 1) // here, but just in terms of chars instead.
let search_start_pos = if range.anchor < range.head {
range.head - 1
} else { } else {
range range.head
}; };
search_fn(text, ch, range.head, count, inclusive)
search_fn(text, ch, search_start_pos, count, inclusive)
.map_or(range, |pos| range.put_cursor(text, pos, extend)) .map_or(range, |pos| range.put_cursor(text, pos, extend))
}); });
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
@ -795,11 +780,10 @@ fn replace(cx: &mut Context) {
_ => None, _ => None,
}; };
let text = doc.text().slice(..); let selection = doc.selection(view.id);
let selection = doc.selection(view.id).clone().min_width_1(text);
if let Some(ch) = ch { if let Some(ch) = ch {
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| { let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
if !range.is_empty() { if !range.is_empty() {
let text: String = let text: String =
RopeGraphemes::new(doc.text().slice(range.from()..range.to())) RopeGraphemes::new(doc.text().slice(range.from()..range.to()))
@ -828,11 +812,8 @@ fn replace(cx: &mut Context) {
fn switch_case(cx: &mut Context) { fn switch_case(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let selection = doc let selection = doc.selection(view.id);
.selection(view.id) let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
.clone()
.min_width_1(doc.text().slice(..));
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
let text: Tendril = range let text: Tendril = range
.fragment(doc.text().slice(..)) .fragment(doc.text().slice(..))
.chars() .chars()
@ -856,11 +837,8 @@ fn switch_case(cx: &mut Context) {
fn switch_to_uppercase(cx: &mut Context) { fn switch_to_uppercase(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let selection = doc let selection = doc.selection(view.id);
.selection(view.id) let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
.clone()
.min_width_1(doc.text().slice(..));
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
let text: Tendril = range.fragment(doc.text().slice(..)).to_uppercase().into(); let text: Tendril = range.fragment(doc.text().slice(..)).to_uppercase().into();
(range.from(), range.to(), Some(text)) (range.from(), range.to(), Some(text))
@ -872,11 +850,8 @@ fn switch_to_uppercase(cx: &mut Context) {
fn switch_to_lowercase(cx: &mut Context) { fn switch_to_lowercase(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let selection = doc let selection = doc.selection(view.id);
.selection(view.id) let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
.clone()
.min_width_1(doc.text().slice(..));
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
let text: Tendril = range.fragment(doc.text().slice(..)).to_lowercase().into(); let text: Tendril = range.fragment(doc.text().slice(..)).to_lowercase().into();
(range.from(), range.to(), Some(text)) (range.from(), range.to(), Some(text))
@ -1040,15 +1015,9 @@ fn split_selection_on_newline(cx: &mut Context) {
fn search_impl(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, extend: bool) { fn search_impl(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, extend: bool) {
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view.id); let selection = doc.selection(view.id);
let start = {
// Get the right side of the block cursor. // Get the right side of the primary block cursor.
let range = selection.primary(); let start = graphemes::next_grapheme_boundary(text, selection.primary().cursor(text));
if range.anchor < range.head {
range.head
} else {
graphemes::next_grapheme_boundary(text, range.head)
}
};
// use find_at to find the next match after the cursor, loop around the end // use find_at to find the next match after the cursor, loop around the end
// Careful, `Regex` uses `bytes` as offsets, not character indices! // Careful, `Regex` uses `bytes` as offsets, not character indices!
@ -1132,7 +1101,7 @@ fn extend_line(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text(); let text = doc.text();
let range = doc.selection(view.id).primary().min_width_1(text.slice(..)); let range = doc.selection(view.id).primary();
let (start_line, end_line) = range.line_range(text.slice(..)); let (start_line, end_line) = range.line_range(text.slice(..));
let start = text.line_to_char(start_line); let start = text.line_to_char(start_line);
@ -1168,14 +1137,14 @@ fn extend_to_line_bounds(cx: &mut Context) {
fn delete_selection_impl(reg: &mut Register, doc: &mut Document, view_id: ViewId) { fn delete_selection_impl(reg: &mut Register, doc: &mut Document, view_id: ViewId) {
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view_id).clone().min_width_1(text); let selection = doc.selection(view_id);
// first yank the selection // first yank the selection
let values: Vec<String> = selection.fragments(text).map(Cow::into_owned).collect(); let values: Vec<String> = selection.fragments(text).map(Cow::into_owned).collect();
reg.write(values); reg.write(values);
// then delete // then delete
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| { let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
(range.from(), range.to(), None) (range.from(), range.to(), None)
}); });
doc.apply(&transaction, view_id); doc.apply(&transaction, view_id);
@ -1247,12 +1216,10 @@ fn append_mode(cx: &mut Context) {
doc.restore_cursor = true; doc.restore_cursor = true;
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().min_width_1(text);
// Make sure there's room at the end of the document if the last // Make sure there's room at the end of the document if the last
// selection butts up against it. // selection butts up against it.
let end = text.len_chars(); let end = text.len_chars();
let last_range = selection.iter().last().unwrap(); let last_range = doc.selection(view.id).iter().last().unwrap();
if !last_range.is_empty() && last_range.head == end { if !last_range.is_empty() && last_range.head == end {
let transaction = Transaction::change( let transaction = Transaction::change(
doc.text(), doc.text(),
@ -1261,7 +1228,7 @@ fn append_mode(cx: &mut Context) {
doc.apply(&transaction, view.id); doc.apply(&transaction, view.id);
} }
let selection = selection.transform(|range| { let selection = doc.selection(view.id).clone().transform(|range| {
Range::new( Range::new(
range.from(), range.from(),
graphemes::next_grapheme_boundary(doc.text().slice(..), range.to()), graphemes::next_grapheme_boundary(doc.text().slice(..), range.to()),
@ -1689,10 +1656,7 @@ mod cmd {
match cx.editor.clipboard_provider.get_contents() { match cx.editor.clipboard_provider.get_contents() {
Ok(contents) => { Ok(contents) => {
let selection = doc let selection = doc.selection(view.id);
.selection(view.id)
.clone()
.min_width_1(doc.text().slice(..));
let transaction = let transaction =
Transaction::change_by_selection(doc.text(), &selection, |range| { Transaction::change_by_selection(doc.text(), &selection, |range| {
(range.from(), range.to(), Some(contents.as_str().into())) (range.from(), range.to(), Some(contents.as_str().into()))
@ -2471,7 +2435,7 @@ fn select_mode(cx: &mut Context) {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
// Make sure all selections are at least 1-wide. // Make sure end-of-document selections are also 1-width.
// (With the exception of being in an empty document, of course.) // (With the exception of being in an empty document, of course.)
let selection = doc.selection(view.id).clone().transform(|range| { let selection = doc.selection(view.id).clone().transform(|range| {
if range.is_empty() && range.head == text.len_chars() { if range.is_empty() && range.head == text.len_chars() {
@ -2480,7 +2444,7 @@ fn select_mode(cx: &mut Context) {
range.head, range.head,
) )
} else { } else {
range.min_width_1(text) range
} }
}); });
doc.set_selection(view.id, selection); doc.set_selection(view.id, selection);
@ -3037,9 +3001,10 @@ pub mod insert {
let text = doc.text().slice(..); let text = doc.text().slice(..);
let transaction = let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
let pos = range.cursor(text);
( (
graphemes::nth_prev_grapheme_boundary(text, range.head, count), graphemes::nth_prev_grapheme_boundary(text, pos, count),
range.head, pos,
None, None,
) )
}); });
@ -3052,9 +3017,10 @@ pub mod insert {
let text = doc.text().slice(..); let text = doc.text().slice(..);
let transaction = let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
let pos = range.cursor(text);
( (
range.head, pos,
graphemes::nth_next_grapheme_boundary(text, range.head, count), graphemes::nth_next_grapheme_boundary(text, pos, count),
None, None,
) )
}); });
@ -3100,8 +3066,6 @@ fn yank(cx: &mut Context) {
let values: Vec<String> = doc let values: Vec<String> = doc
.selection(view.id) .selection(view.id)
.clone()
.min_width_1(text)
.fragments(text) .fragments(text)
.map(Cow::into_owned) .map(Cow::into_owned)
.collect(); .collect();
@ -3125,8 +3089,6 @@ fn yank_joined_to_clipboard_impl(editor: &mut Editor, separator: &str) -> anyhow
let values: Vec<String> = doc let values: Vec<String> = doc
.selection(view.id) .selection(view.id)
.clone()
.min_width_1(text)
.fragments(text) .fragments(text)
.map(Cow::into_owned) .map(Cow::into_owned)
.collect(); .collect();
@ -3157,11 +3119,7 @@ fn yank_main_selection_to_clipboard_impl(editor: &mut Editor) -> anyhow::Result<
let (view, doc) = current!(editor); let (view, doc) = current!(editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let value = doc let value = doc.selection(view.id).primary().fragment(text);
.selection(view.id)
.primary()
.min_width_1(text)
.fragment(text);
if let Err(e) = editor.clipboard_provider.set_contents(value.into_owned()) { if let Err(e) = editor.clipboard_provider.set_contents(value.into_owned()) {
bail!("Couldn't set system clipboard content: {:?}", e); bail!("Couldn't set system clipboard content: {:?}", e);
@ -3202,9 +3160,9 @@ fn paste_impl(
let mut values = values.iter().cloned().map(Tendril::from).chain(repeat); let mut values = values.iter().cloned().map(Tendril::from).chain(repeat);
let text = doc.text(); let text = doc.text();
let selection = doc.selection(view.id).clone().min_width_1(text.slice(..)); let selection = doc.selection(view.id);
let transaction = Transaction::change_by_selection(text, &selection, |range| { let transaction = Transaction::change_by_selection(text, selection, |range| {
let pos = match (action, linewise) { let pos = match (action, linewise) {
// paste linewise before // paste linewise before
(Paste::Before, true) => text.line_to_char(text.char_to_line(range.from())), (Paste::Before, true) => text.line_to_char(text.char_to_line(range.from())),
@ -3257,11 +3215,8 @@ fn replace_with_yanked(cx: &mut Context) {
if let Some(values) = registers.read(reg_name) { if let Some(values) = registers.read(reg_name) {
if let Some(yank) = values.first() { if let Some(yank) = values.first() {
let selection = doc let selection = doc.selection(view.id);
.selection(view.id) let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
.clone()
.min_width_1(doc.text().slice(..));
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
if !range.is_empty() { if !range.is_empty() {
(range.from(), range.to(), Some(yank.as_str().into())) (range.from(), range.to(), Some(yank.as_str().into()))
} else { } else {
@ -3280,11 +3235,8 @@ fn replace_selections_with_clipboard_impl(editor: &mut Editor) -> anyhow::Result
match editor.clipboard_provider.get_contents() { match editor.clipboard_provider.get_contents() {
Ok(contents) => { Ok(contents) => {
let selection = doc let selection = doc.selection(view.id);
.selection(view.id) let transaction = Transaction::change_by_selection(doc.text(), selection, |range| {
.clone()
.min_width_1(doc.text().slice(..));
let transaction = Transaction::change_by_selection(doc.text(), &selection, |range| {
(range.from(), range.to(), Some(contents.as_str().into())) (range.from(), range.to(), Some(contents.as_str().into()))
}); });
@ -3857,8 +3809,7 @@ fn surround_add(cx: &mut Context) {
} = event } = event
{ {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let selection = doc.selection(view.id);
let selection = doc.selection(view.id).clone().min_width_1(text);
let (open, close) = surround::get_pair(ch); let (open, close) = surround::get_pair(ch);
let mut changes = Vec::new(); let mut changes = Vec::new();
@ -3890,9 +3841,9 @@ fn surround_replace(cx: &mut Context) {
{ {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().min_width_1(text); let selection = doc.selection(view.id);
let change_pos = match surround::get_surround_pos(text, &selection, from, count) let change_pos = match surround::get_surround_pos(text, selection, from, count)
{ {
Some(c) => c, Some(c) => c,
None => return, None => return,
@ -3927,9 +3878,9 @@ fn surround_delete(cx: &mut Context) {
{ {
let (view, doc) = current!(cx.editor); let (view, doc) = current!(cx.editor);
let text = doc.text().slice(..); let text = doc.text().slice(..);
let selection = doc.selection(view.id).clone().min_width_1(text); let selection = doc.selection(view.id);
let change_pos = match surround::get_surround_pos(text, &selection, ch, count) { let change_pos = match surround::get_surround_pos(text, selection, ch, count) {
Some(c) => c, Some(c) => c,
None => return, None => return,
}; };

10
helix-view/src/document.rs
Unescape Escape View File

@ -792,7 +792,8 @@ impl Document {
pub fn set_selection(&mut self, view_id: ViewId, selection: Selection) { pub fn set_selection(&mut self, view_id: ViewId, selection: Selection) {
// TODO: use a transaction? // TODO: use a transaction?
self.selections.insert(view_id, selection); self.selections
.insert(view_id, selection.ensure_invariants(self.text().slice(..)));
} }
fn apply_impl(&mut self, transaction: &Transaction, view_id: ViewId) -> bool { fn apply_impl(&mut self, transaction: &Transaction, view_id: ViewId) -> bool {
@ -807,7 +808,12 @@ impl Document {
.selection() .selection()
.cloned() .cloned()
.unwrap_or_else(|| self.selection(view_id).clone().map(transaction.changes())); .unwrap_or_else(|| self.selection(view_id).clone().map(transaction.changes()));
self.set_selection(view_id, selection); self.selections.insert(view_id, selection);
// Ensure all selections accross all views still adhere to invariants.
for selection in self.selections.values_mut() {
*selection = selection.clone().ensure_invariants(self.text.slice(..));
}
} }
if !transaction.changes().is_empty() { if !transaction.changes().is_empty() {

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