diff options
Diffstat (limited to 'src/grid')
| -rw-r--r-- | src/grid/mod.rs | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/src/grid/mod.rs b/src/grid/mod.rs index ac761adc..65bc8382 100644 --- a/src/grid/mod.rs +++ b/src/grid/mod.rs @@ -113,6 +113,14 @@ pub struct GridIterator<'a, T: 'a> { top: usize, } +pub enum Scroll { + Lines(isize), + PageUp, + PageDown, + Top, + Bottom, +} + impl<T: Copy + Clone> Grid<T> { pub fn new(lines: index::Line, cols: index::Column, scrollback: usize, template: T) -> Grid<T> { let mut raw = Storage::with_capacity(*lines + scrollback, lines); @@ -165,34 +173,28 @@ impl<T: Copy + Clone> Grid<T> { self.line_to_offset(line) + self.display_offset } - pub fn scroll_display(&mut self, count: isize) { - self.display_offset = min( - max((self.display_offset as isize) + count, 0isize) as usize, - self.scroll_limit - ); - } - - pub fn reset_scroll_display(&mut self) { - self.display_offset = 0; - } - - pub fn scroll_to_top(&mut self) { - self.display_offset = self.scroll_limit; - } - - pub fn scroll_page_up(&mut self) { - if self.display_offset + self.lines.0 >= self.scroll_limit { - self.display_offset = self.scroll_limit; - } else { - self.display_offset += self.lines.0; - } - } - - pub fn scroll_page_down(&mut self) { - if self.display_offset <= self.lines.0 { - self.display_offset = 0; - } else { - self.display_offset -= self.lines.0; + pub fn scroll_display(&mut self, scroll: Scroll) { + match scroll { + Scroll::Lines(count) => { + self.display_offset = min( + max((self.display_offset as isize) + count, 0isize) as usize, + self.scroll_limit + ); + }, + Scroll::PageUp => { + self.display_offset = min( + self.display_offset + self.lines.0, + self.scroll_limit + ); + }, + Scroll::PageDown => { + self.display_offset -= min( + self.display_offset, + self.lines.0 + ); + }, + Scroll::Top => self.display_offset = self.scroll_limit, + Scroll::Bottom => self.display_offset = 0, } } |