(
file: &mut crate::editor::OpenFile,
delta: isize,
visible_height: usize,
)
| 69 | } |
| 70 | |
| 71 | pub fn scroll_editor_file( |
| 72 | file: &mut crate::editor::OpenFile, |
| 73 | delta: isize, |
| 74 | visible_height: usize, |
| 75 | ) { |
| 76 | let visible_height = visible_height.max(1); |
| 77 | let max_scroll = file.buffer.line_count().saturating_sub(visible_height); |
| 78 | |
| 79 | file.scroll_top = if delta.is_negative() { |
| 80 | file.scroll_top.saturating_sub(delta.unsigned_abs()) |
| 81 | } else { |
| 82 | file.scroll_top |
| 83 | .saturating_add(delta as usize) |
| 84 | .min(max_scroll) |
| 85 | }; |
| 86 | |
| 87 | let (cursor_row, cursor_col) = file.buffer.cursor(); |
| 88 | if cursor_row < file.scroll_top { |
| 89 | file.buffer.set_cursor(file.scroll_top, cursor_col); |
| 90 | } else { |
| 91 | let last_visible = file.scroll_top + visible_height.saturating_sub(1); |
| 92 | if cursor_row > last_visible { |
| 93 | file.buffer.set_cursor(last_visible, cursor_col); |
| 94 | } |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | pub fn position_editor_cursor_from_mouse( |
| 99 | file: &mut crate::editor::OpenFile, |
no test coverage detected