editor: Represent scroll offset with more precision (#39367)

Closes #5355

Release Notes:

- Fixed rendering glitches with files with more than 16 million lines
(that occured due to floating number rounding errors).

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/workspace/src/dock.rs

@@ -14,7 +14,7 @@ use std::sync::Arc;
 use ui::{ContextMenu, Divider, DividerColor, IconButton, Tooltip, h_flex};
 use ui::{prelude::*, right_click_menu};
 
-pub(crate) const RESIZE_HANDLE_SIZE: Pixels = Pixels(6.);
+pub(crate) const RESIZE_HANDLE_SIZE: Pixels = px(6.);
 
 pub enum PanelEvent {
     ZoomIn,
@@ -732,7 +732,7 @@ impl Dock {
     }
 
     pub fn clamp_panel_size(&mut self, max_size: Pixels, window: &mut Window, cx: &mut App) {
-        let max_size = px((max_size.0 - RESIZE_HANDLE_SIZE.0).abs());
+        let max_size = (max_size - RESIZE_HANDLE_SIZE).abs();
         for panel in self.panel_entries.iter().map(|entry| &entry.panel) {
             if panel.size(window, cx) > max_size {
                 panel.set_size(Some(max_size.max(RESIZE_HANDLE_SIZE)), window, cx);

crates/workspace/src/pane_group.rs

@@ -1259,11 +1259,11 @@ mod element {
                         origin: child
                             .bounds
                             .origin
-                            .apply_along(Axis::Horizontal, |val| val + Pixels(1.)),
+                            .apply_along(Axis::Horizontal, |val| val + px(1.)),
                         size: child
                             .bounds
                             .size
-                            .apply_along(Axis::Horizontal, |val| val - Pixels(1.)),
+                            .apply_along(Axis::Horizontal, |val| val - px(1.)),
                     };
 
                     if overlay_opacity.is_some()

crates/workspace/src/persistence.rs

@@ -252,7 +252,7 @@ impl sqlez::bindable::Bind for SerializedPixels {
         statement: &sqlez::statement::Statement,
         start_index: i32,
     ) -> anyhow::Result<i32> {
-        let this: i32 = self.0.0 as i32;
+        let this: i32 = u32::from(self.0) as _;
         this.bind(statement, start_index)
     }
 }

crates/workspace/src/workspace.rs

@@ -5989,7 +5989,7 @@ impl Workspace {
         self.left_dock.read_with(cx, |left_dock, cx| {
             let left_dock_size = left_dock
                 .active_panel_size(window, cx)
-                .unwrap_or(Pixels(0.0));
+                .unwrap_or(Pixels::ZERO);
             if left_dock_size + size > self.bounds.right() {
                 size = self.bounds.right() - left_dock_size
             }