From 7129429e889d0b9c97f723ddae7dea10a0d6a60d Mon Sep 17 00:00:00 2001
From: mars <mars@tebibyte.media>
Date: Tue, 4 Oct 2022 17:52:23 -0600
Subject: [PATCH] Quick cell cull + backup resize events

---
 src/main.rs | 36 +++++++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index e3357c6..def2969 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -47,6 +47,8 @@ pub struct App {
     should_quit: bool,
     cell_width: usize,
     cell_height: usize,
+    current_width: usize,
+    current_height: usize,
     colors: Colors,
     term_loop: JoinHandle<(TermEventLoop<Pty, TermListener>, TermState)>,
     term_channel: MioSender<TermMsg>,
@@ -66,9 +68,12 @@ impl App {
         let cell_width = normal_font.bounds().width as usize;
         let cell_height = normal_font.bounds().height as usize;
 
+        let current_width = 2000;
+        let current_height = 2000;
+
         let term_size = alacritty_terminal::term::SizeInfo::new(
-            2000.0,
-            2000.0,
+            current_width as f32,
+            current_height as f32,
             cell_width as f32,
             cell_height as f32,
             0.0,
@@ -113,6 +118,8 @@ impl App {
             should_quit: false,
             cell_width,
             cell_height,
+            current_width,
+            current_height,
             term,
             term_channel,
             term_events,
@@ -176,6 +183,10 @@ impl App {
             (size.width as usize, size.height as usize)
         };
 
+        if width != self.current_width || height != self.current_height {
+            self.on_resize(width as u32, height as u32);
+        }
+
         let mut buffer = vec![0u32; (width * height) as usize];
         let term = self.term.lock();
         let content = term.renderable_content();
@@ -185,6 +196,15 @@ impl App {
         use alacritty_terminal::term::cell::Flags as CellFlags;
 
         for cell in content.display_iter.into_iter() {
+            let term_row = cell.point.line.0 as usize;
+            let term_col = cell.point.column.0 as usize;
+
+            if (term_row + 1) * self.cell_height >= height
+                || (term_col + 1) * self.cell_width >= width
+            {
+                continue;
+            }
+
             if cell.flags.contains(CellFlags::HIDDEN) {
                 continue;
             }
@@ -196,15 +216,6 @@ impl App {
             };
 
             if let Some(glyph) = font.glyphs().get(&cell.c) {
-                let term_row = cell.point.line.0 as usize;
-                let term_col = cell.point.column.0 as usize;
-
-                if (term_row + 1) * self.cell_height >= height
-                    || (term_col + 1) * self.cell_width >= width
-                {
-                    continue;
-                }
-
                 let (bg, fg) = if cell.flags.contains(CellFlags::INVERSE) {
                     (&cell.fg, &cell.bg)
                 } else {
@@ -361,6 +372,9 @@ impl App {
         );
 
         self.term_channel.send(TermMsg::Resize(term_size)).unwrap();
+
+        self.current_width = width as usize;
+        self.current_height = height as usize;
     }
 }