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Fixed minor bug in cursor navigation.

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This commit is contained in:
Nathan Vegdahl 2017-12-31 03:04:25 -08:00
parent 76bd98e5ae
commit 29b17f6e20
1 changed files with 32 additions and 26 deletions
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26
src/editor/mod.rs
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@ -571,31 +571,34 @@ impl<T: LineFormatter> Editor<T> {
pub fn cursor_up(&mut self, n: usize) {
for c in self.cursors.iter_mut() {
let vmove = -1 * (n * self.formatter.single_line_height()) as isize;
let mut temp_index = self.formatter.index_offset_vertical_v2d(
&self.buffer,
c.range.0,
vmove,
(Round, Round),
);
if temp_index == 0 {
c.update_vis_start(&(self.buffer), &(self.formatter));
} else {
temp_index = self.formatter.index_set_horizontal_v2d(
&self.buffer,
temp_index,
c.vis_start,
Round,
);
}
if !self.buffer.is_grapheme(temp_index) {
temp_index = self.buffer.nth_prev_grapheme(temp_index, 1);
}
if temp_index == c.range.0 {
// We were already at the top.
c.range.0 = 0;
c.range.1 = 0;
c.update_vis_start(&(self.buffer), &(self.formatter));
} else {
c.range.0 = temp_index;
c.range.1 = temp_index;
}
}
// Adjust view
self.move_view_to_cursor();
@ -604,31 +607,34 @@ impl<T: LineFormatter> Editor<T> {
pub fn cursor_down(&mut self, n: usize) {
for c in self.cursors.iter_mut() {
let vmove = (n * self.formatter.single_line_height()) as isize;
let mut temp_index = self.formatter.index_offset_vertical_v2d(
&self.buffer,
c.range.0,
vmove,
(Round, Round),
);
if temp_index == self.buffer.char_count() {
c.update_vis_start(&(self.buffer), &(self.formatter));
} else {
temp_index = self.formatter.index_set_horizontal_v2d(
&self.buffer,
temp_index,
c.vis_start,
Round,
);
}
if !self.buffer.is_grapheme(temp_index) {
temp_index = self.buffer.nth_prev_grapheme(temp_index, 1);
}
if temp_index == c.range.0 {
// We were already at the bottom.
c.range.0 = self.buffer.char_count();
c.range.1 = self.buffer.char_count();
c.update_vis_start(&(self.buffer), &(self.formatter));
} else {
c.range.0 = temp_index;
c.range.1 = temp_index;
}
}
// Adjust view
self.move_view_to_cursor();