Adds config option for command palette rows (#4595)

Co-authored-by: Wez Furlong <[email protected]>

config/src/config.rs

@@ -148,6 +148,7 @@ pub struct Config {
     #[dynamic(default = "default_command_palette_font_size")]
     pub command_palette_font_size: f64,
 
+    pub command_palette_rows: Option<usize>,
     #[dynamic(default = "default_command_palette_fg_color")]
     pub command_palette_fg_color: RgbaColor,
 

docs/config/lua/config/command_palette_rows.md

@@ -0,0 +1,12 @@
+---
+tags:
+  - appearance
+  - command_palette
+---
+# `command_palette_rows = 14`
+
+{{since('nightly')}}
+
+Specifies the number of rows displayed by the command palette.
+[ActivateCommandPalette](../keyassignment/ActivateCommandPalette.md).
+If unset or `nil`, a default value based on the terminal display will be used.

wezterm-gui/src/termwindow/palette.rs

@@ -664,9 +664,12 @@ impl Modal for CommandPalette {
             .expect("to resolve char selection font");
         let metrics = RenderMetrics::with_font_metrics(&font.metrics());
 
-        let max_rows_on_screen = ((term_window.dimensions.pixel_height * 8 / 10)
+        let mut max_rows_on_screen = ((term_window.dimensions.pixel_height * 8 / 10)
             / metrics.cell_size.height as usize)
             - 2;
+        if let Some(size) = term_window.config.command_palette_rows {
+            max_rows_on_screen = max_rows_on_screen.min(size);
+        }
         *self.max_rows_on_screen.borrow_mut() = max_rows_on_screen;
 
         let rebuild_matches = results