Add support for single line terminals

This changes the minimum terminal dimensions from 2 lines and 2 columns,
to 1 line and 2 columns.

This also reworks the `SizeInfo` to store the number of columns and
lines and consistently has only the terminal lines/columns stored,
instead of including the message bar and search in some places of the
Alacritty renderer/input.

These new changes also make it easy to properly start the selection
scrolling as soon as the mouse is over the message bar, instead of
waiting until it is beyond it.

Fixes #4207.

Co-authored-by: Christian Duerr <contact@christianduerr.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/alacritty/src/renderer/rects.rs b/alacritty/src/renderer/rects.rs
index 83b59cb3..ca0bbd1c 100644
--- a/alacritty/src/renderer/rects.rs
+++ b/alacritty/src/renderer/rects.rs
@@ -99,14 +99,14 @@ impl RenderLine {
         mut thickness: f32,
         color: Rgb,
     ) -> RenderRect {
-        let start_x = start.col.0 as f32 * size.cell_width;
-        let end_x = (end.col.0 + 1) as f32 * size.cell_width;
+        let start_x = start.col.0 as f32 * size.cell_width();
+        let end_x = (end.col.0 + 1) as f32 * size.cell_width();
         let width = end_x - start_x;
 
         // Make sure lines are always visible.
         thickness = thickness.max(1.);
 
-        let line_bottom = (start.line.0 as f32 + 1.) * size.cell_height;
+        let line_bottom = (start.line.0 as f32 + 1.) * size.cell_height();
         let baseline = line_bottom + descent;
 
         let mut y = (baseline - position - thickness / 2.).ceil();
@@ -115,7 +115,14 @@ impl RenderLine {
             y = max_y;
         }
 
-        RenderRect::new(start_x + size.padding_x, y + size.padding_y, width, thickness, color, 1.)
+        RenderRect::new(
+            start_x + size.padding_x(),
+            y + size.padding_y(),
+            width,
+            thickness,
+            color,
+            1.,
+        )
     }
 }