From 94c6573e540f3a3d5896314c134d34b8ac7f16df Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Mon, 19 Feb 2024 21:30:31 -0800
Subject: [PATCH] terminal/new: detect empty rows

---
 src/terminal/new/Screen.zig | 4 ++++
 src/terminal/new/page.zig   | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/src/terminal/new/Screen.zig b/src/terminal/new/Screen.zig
index 6d35653d3..0ee165881 100644
--- a/src/terminal/new/Screen.zig
+++ b/src/terminal/new/Screen.zig
@@ -87,6 +87,10 @@ pub fn dumpString(
             break :cells cells[0..self.pages.cols];
         };
 
+        if (!pagepkg.Cell.hasText(cells)) {
+            blank_rows += 1;
+            continue;
+        }
         if (blank_rows > 0) {
             for (0..blank_rows) |_| try writer.writeByte('\n');
             blank_rows = 0;
diff --git a/src/terminal/new/page.zig b/src/terminal/new/page.zig
index de88a820b..8d1bda336 100644
--- a/src/terminal/new/page.zig
+++ b/src/terminal/new/page.zig
@@ -198,6 +198,15 @@ pub const Row = packed struct(u18) {
 pub const Cell = packed struct(u32) {
     codepoint: u21 = 0,
     _padding: u11 = 0,
+
+    /// Returns true if the set of cells has text in it.
+    pub fn hasText(cells: []const Cell) bool {
+        for (cells) |cell| {
+            if (cell.codepoint != 0) return true;
+        }
+
+        return false;
+    }
 };
 
 // Uncomment this when you want to do some math.