Minor refactor with if-let guards (#145)

`if let` guards were stabilized in 1.95. The code concerning the TODO has been refactored.

src/tui.rs

@@ -701,31 +701,28 @@ impl Tui {
 		match ev {
 			Event::Key(key) => {
 				match key.code {
-					KeyCode::Char(c) => {
+					KeyCode::Char(c)
-						// TODO: refactor back to `if let` arm guards when those are stabilized
 						if let BottomMessage::Input(InputCommand::Search(ref mut term)) =
-							self.bottom_msg
+							self.bottom_msg =>
 					{
 						term.push(c);
-							return Some(InputAction::Redraw);
+						InputAction::Redraw.into()
 					}
-
+					KeyCode::Char(c)
 						if let BottomMessage::Input(InputCommand::GoToPage(ref mut page)) =
-							self.bottom_msg
+							self.bottom_msg && matches!(c, 'g' if self.is_kitty) =>
-						{
+						c.to_digit(10).map(|input_num| {
-							if c == 'g' && self.is_kitty {
-								self.update_zoom(Zoom::pan_bottom);
-								self.set_msg(MessageSetting::Pop);
-								return Some(InputAction::Redraw);
-							}
-
-							return c.to_digit(10).map(|input_num| {
 							*page = (*page * 10) + input_num as usize;
 							InputAction::Redraw
-							});
+						}),
+					KeyCode::Char(_)
+						if let BottomMessage::Input(InputCommand::GoToPage(_)) =
+							self.bottom_msg =>
+					{
+						self.set_msg(MessageSetting::Pop);
+						self.update_zoom(Zoom::pan_bottom)
 					}
-
+					KeyCode::Char(c) => match c {
-						match c {
 						'l' => self.change_page(PageChange::Next, ChangeAmount::Single),
 						'j' => self.change_page(PageChange::Next, ChangeAmount::WholeScreen),
 						'h' => self.change_page(PageChange::Prev, ChangeAmount::Single),
@@ -749,10 +746,10 @@ impl Tui {
 							Some(InputAction::Redraw)
 						}
 						'f' => Some(InputAction::Fullscreen),
-							'n' if self.page < self.rendered.len() - 1 => {
 						// TODO: If we can't find one, then maybe like block until we've verified
 						// all the pages have been checked?
-								self.rendered[(self.page + 1)..]
+						'n' if self.page < self.rendered.len() - 1 => self.rendered
+							[(self.page + 1)..]
 							.iter()
 							.enumerate()
 							.find_map(|(idx, p)| {
@@ -761,13 +758,8 @@ impl Tui {
 									.then_some(self.page + 1 + idx)
 							})
 							.map(|next_page| {
-										jump_to_page(
+								jump_to_page(&mut self.page, &mut self.last_render.rect, next_page)
-											&mut self.page,
+							}),
-											&mut self.last_render.rect,
-											next_page
-										)
-									})
-							}
 						'N' if self.page > 0 => self.rendered[..(self.page)]
 							.iter()
 							.rev()
@@ -778,11 +770,7 @@ impl Tui {
 									.then_some(self.page - (idx + 1))
 							})
 							.map(|prev_page| {
-									jump_to_page(
+								jump_to_page(&mut self.page, &mut self.last_render.rect, prev_page)
-										&mut self.page,
-										&mut self.last_render.rect,
-										prev_page
-									)
 							}),
 						'z' if key.modifiers.contains(KeyModifiers::CONTROL) => {
 							// [todo] better error handling here?
@@ -841,16 +829,13 @@ impl Tui {
 						'$' if can_zoom => self.update_zoom(Zoom::pan_right),
 						'r' => Some(InputAction::Rotate),
 						_ => None
-						}
+					},
-					}
+					KeyCode::Backspace
-					KeyCode::Backspace => {
 						if let BottomMessage::Input(InputCommand::Search(ref mut term)) =
-							self.bottom_msg
+							self.bottom_msg =>
 					{
 						term.pop();
-							return Some(InputAction::Redraw);
+						InputAction::Redraw.into()
-						}
-						None
 					}
 					KeyCode::Right => self.change_page(PageChange::Next, ChangeAmount::Single),
 					KeyCode::Down | KeyCode::PageDown =>