Update changelog

* Fix weird cropping when zooming out too much with kitty

* Add changelog entry

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Unreleased
 
 - Switched simd base64 crate for one that works on stable (from `vb64` to `base64_simd`)
+- Allow boolean arguments to function as flags, without a `true` or `false` argument following the flag itself
+- Fix cropping issues when zooming out too much while using kitty protocol
+- Added `gg` and `G` keybindings for scrolling to the top and bottom of a page, respectively, when filling the width of the screen with kitty
+- Updated help page to only show kitty keybindings when you're actually using kitty
 
 # v0.4.3
 

Cargo.toml

@@ -49,7 +49,7 @@ log = "0.4.27"
 flexi_logger = "0.31"
 
 # for tracing with tokio-console
-console-subscriber = { version = "0.4.0", optional = true }
+console-subscriber = { version = "0.5.0", optional = true }
 csscolorparser = { version = "0.7.0" }
 
 [profile.production]
@@ -92,7 +92,7 @@ checked_conversions = "warn"
 copy_iterator = "warn"
 default_trait_access = "warn"
 doc_link_with_quotes = "warn"
-empty_enum = "warn"
+empty_enums = "warn"
 explicit_into_iter_loop = "warn"
 explicit_iter_loop = "warn"
 filter_map_next = "warn"

src/main.rs

@@ -83,11 +83,11 @@ async fn inner_main() -> Result<(), WrappedErr> {
 	let flags = xflags::parse_or_exit! {
 		/// Display the pdf with the pages starting at the right hand size and moving left and
 		/// adjust input keys to match
-		optional -r,--r-to-l r_to_l: bool
+		optional -r,--r-to-l
 		/// The maximum number of pages to display together, horizontally, at a time
 		optional -m,--max-wide max_wide: NonZeroUsize
 		/// Fullscreen the pdf (hide document name, page count, etc)
-		optional -f,--fullscreen fullscreen: bool
+		optional -f,--fullscreen
 		/// The number of pages to prerender surrounding the currently-shown page; 0 means no
 		/// limit. By default, there is no limit.
 		optional -p,--prerender prerender: usize
@@ -267,12 +267,7 @@ async fn inner_main() -> Result<(), WrappedErr> {
 		|| "Unknown file".into(),
 		|n| n.to_string_lossy().to_string()
 	);
-	let tui = Tui::new(
-		file_name,
-		flags.max_wide,
-		flags.r_to_l.unwrap_or_default(),
-		is_kitty
-	);
+	let tui = Tui::new(file_name, flags.max_wide, flags.r_to_l, is_kitty);
 
 	let backend = CrosstermBackend::new(std::io::stdout());
 	let mut term = Terminal::new(backend).map_err(|e| {
@@ -300,7 +295,7 @@ async fn inner_main() -> Result<(), WrappedErr> {
 		})?;
 	}
 
-	let fullscreen = flags.fullscreen.unwrap_or_default();
+	let fullscreen = flags.fullscreen;
 	let main_area = Tui::main_layout(&term.get_frame(), fullscreen);
 	to_renderer
 		.send(RenderNotif::Area(main_area.page_area))

src/tui.rs

@@ -16,6 +16,7 @@ use nix::{
 use ratatui::{
 	Frame,
 	layout::{Constraint, Flex, Layout, Position, Rect},
+	prelude::{Line, Text},
 	style::{Color, Style},
 	symbols::border,
 	text::Span,
@@ -205,23 +206,28 @@ impl Tui {
 
 					log::debug!("zoom is now {zoom:#?}");
 					log::debug!("img_area is {img_area:#?}");
+					log::debug!("img dimensions are {cell_w}x{cell_h}");
 
-					if zoom.level < 0 {
-						img_area = Rect {
-							width: img_area
-								.width
-								.saturating_sub((zoom.level * 2).unsigned_abs())
-								.max(1),
-							x: img_area.x + (zoom.level.unsigned_abs().min(img_area.width / 2)),
-							..img_area
-						}
-					}
-
-					log::debug!("after adjustment, img_area is {img_area:#?}");
-
-					// Ugh I don't like this logic. I wish we could simplify it.
 					let img_width = f32::from(cell_w);
 					let img_height = f32::from(cell_h);
+
+					let img_aspect_ratio = img_width / img_height;
+
+					if zoom.level < 0 {
+						let old_width = img_area.width;
+						img_area.width = img_area
+							.width
+							.saturating_sub((zoom.level * 2).unsigned_abs())
+							.max((f32::from(img_area.height) * img_aspect_ratio) as u16);
+						img_area.x += (old_width - img_area.width) / 2;
+
+						log::debug!("after adjustment, img_area is {img_area:#?}");
+
+						// TODO: Find a way to detect when we've hit the maximum zoom-out and stop
+						// more zooming out
+					}
+
+					// Ugh I don't like this logic. I wish we could simplify it.
 					let img_area_width = f32::from(img_area.width);
 					let img_area_height = f32::from(img_area.height);
 					let available_to_real_width_ratio = img_area_width / img_width;
@@ -560,6 +566,12 @@ impl Tui {
 						if let BottomMessage::Input(InputCommand::GoToPage(ref mut page)) =
 							self.bottom_msg
 						{
+							if c == 'g' && self.is_kitty {
+								self.update_zoom(|z| z.cell_pan_from_top = 0);
+								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
@@ -673,6 +685,8 @@ impl Tui {
 							'K' if self.is_kitty => self.update_zoom(|z| {
 								z.cell_pan_from_top = z.cell_pan_from_top.saturating_sub(1)
 							}),
+							'G' if self.is_kitty =>
+								self.update_zoom(|z| z.cell_pan_from_top = u16::MAX),
 							_ => None
 						}
 					}
@@ -787,7 +801,7 @@ impl Tui {
 		}
 	}
 
-	// I want this to always return 0 'cause I just use it to return from `Self::handle_event`]
+	// I want this to always return an option 'cause I just use it to return from `Self::handle_event`
 	#[expect(clippy::unnecessary_wraps)]
 	fn update_zoom(&mut self, f: impl FnOnce(&mut Zoom)) -> Option<InputAction> {
 		if let Some(z) = &mut self.zoom {
@@ -847,11 +861,24 @@ impl Tui {
 			.border_set(border::ROUNDED)
 			.border_style(Color::Blue);
 
-		let help_span = Paragraph::new(HELP_PAGE).wrap(Wrap { trim: false });
+		let help_sections = [
+			Text::from(HELP_PAGE),
+			// just some spacing
+			Text::from(""),
+			if self.is_kitty {
+				Text::from(KITTY_HELP)
+			} else {
+				Text::from("Not using kitty, kitty-specific keybindings hidden")
+					.style(Color::DarkGray)
+			}
+		];
 
-		let max_w: u16 = HELP_PAGE
-			.lines()
-			.map(str::len)
+		let max_w: u16 = help_sections
+			.iter()
+			.flat_map(|section| section.lines.as_slice())
+			// We don't really need full unicode-width since we're using all ascii for the help
+			// pages, but this is the function they give us.
+			.map(Line::width)
 			.max()
 			.unwrap_or_default()
 			.try_into()
@@ -866,15 +893,24 @@ impl Tui {
 
 		let block_area = Layout::vertical([
 			Constraint::Fill(1),
-			Constraint::Length(u16::try_from(HELP_PAGE.lines().count()).unwrap() + 4),
+			Constraint::Length(
+				u16::try_from(help_sections.iter().map(|s| s.lines.len()).sum::<usize>()).unwrap()
+					+ 4
+			),
 			Constraint::Fill(1)
 		])
 		.split(layout[1]);
 
-		let block_inner = block.inner(block_area[1]);
+		let mut block_inner = block.inner(block_area[1]);
 
 		frame.render_widget(block, block_area[1]);
-		frame.render_widget(help_span, block_inner);
+
+		for section in help_sections {
+			let section_lines = section.lines.len();
+			let span = Paragraph::new(section).wrap(Wrap { trim: false });
+			frame.render_widget(span, block_inner);
+			block_inner.y += u16::try_from(section_lines).unwrap();
+		}
 	}
 }
 
@@ -895,18 +931,24 @@ i:
     Invert colors
 f:
     Remove borders/fullscreen
-z (when using kitty protocol):
-    Toggle between fill-screen and fit-screen
-o/O (when on fill-screen):
-    zoom in and out, respectively
-H, J, K, L (when zoomed in):
-    pan direction around page
 ?:
     Show this page
 ctrl+z:
     Suspend & background tdf \
 ";
 
+static KITTY_HELP: &str = "\
+When using Kitty Protocol:
+z:
+    Toggle between fill-screen and fit-screen
+o/O (when on fill-screen):
+    Zoom in and out, respectively
+gg/G (when on fill-screen):
+    Scroll to top/bottom of page
+H, J, K, L (when zoomed in):
+    Pan direction around page
+";
+
 pub enum InputAction {
 	Redraw,
 	JumpingToPage(usize),