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@ -204,48 +204,35 @@ impl Editor {
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}
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}
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fn scroll_region(&mut self, top: u64, bot: u64, left: u64, right: u64, rows: i64, cols: i64) {
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fn scroll_region(&mut self, top: u64, bot: u64, left: u64, right: u64, rows: i64, cols: i64) {
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let (top, bot) = if rows > 0 {
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let (mut y, end_y, step_y) = if rows > 0 {
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(top as i64 + rows, bot as i64)
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(top as i64 + rows, bot as i64, 1)
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} else if rows < 0 {
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(top as i64, bot as i64 + rows)
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} else {
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} else {
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(top as i64, bot as i64)
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(bot as i64 + rows - 1, top as i64 - 1, -1)
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};
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};
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let (left, right) = if cols > 0 {
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let (start_x, end_x, step_x) = if cols > 0 {
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(left as i64 + cols, right as i64)
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(left as i64 + cols, right as i64, 1)
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} else if rows < 0 {
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(left as i64, right as i64 + cols)
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} else {
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} else {
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(left as i64, right as i64)
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(right as i64 + cols - 1, left as i64 - 1, -1)
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};
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};
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let mut region = Vec::new();
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while y != end_y {
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for y in top..bot {
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let dest_y = y - rows;
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let row = &self.grid[y as usize];
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if dest_y >= 0 && dest_y < self.size.1 as i64 {
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let mut copied_section = Vec::new();
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let mut x = start_x;
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for x in left..right {
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while x != end_x {
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copied_section.push(row[x as usize].clone());
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let dest_x = x - cols;
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}
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if dest_x >= 0 && dest_x < self.size.0 as i64 {
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region.push(copied_section);
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let cell = std::mem::replace(&mut self.grid[y as usize][x as usize], None);
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}
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self.grid[dest_y as usize][dest_x as usize] = cell;
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self.dirty[dest_y as usize][dest_x as usize] = true;
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let new_top = top as i64 - rows;
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self.dirty[y as usize][x as usize] = true;
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let new_left = left as i64 - cols;
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for (y, row_section) in region.into_iter().enumerate() {
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for (x, cell) in row_section.into_iter().enumerate() {
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let y = new_top + y as i64;
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if y >= 0 && y < self.grid.len() as i64 {
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let row = &mut self.grid[y as usize];
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let dirty_row = &mut self.dirty[y as usize];
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let x = new_left + x as i64;
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if x >= 0 && x < row.len() as i64 {
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row[x as usize] = cell;
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dirty_row[x as usize] = true;
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}
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}
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x += step_x;
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}
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}
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}
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}
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y += step_y;
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}
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}
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}
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}
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