Merge branch 'main' into scroll-manager-display-map

crates/editor/src/editor.rs

@@ -3695,7 +3695,7 @@ impl Editor {
             return;
         }
 
-        self.apply_scroll_delta(scroll_delta, window, cx);
+        self.apply_scroll_delta(scroll_delta, &display_map, window, cx);
         cx.notify();
     }
 

crates/editor/src/element.rs

@@ -1018,7 +1018,7 @@ impl EditorElement {
                     drop_cursor.start = drop_anchor;
                     drop_cursor.end = drop_anchor;
                     *hide_drop_cursor = !text_hitbox.is_hovered(window);
-                    editor.apply_scroll_delta(scroll_delta, window, cx);
+                    editor.apply_scroll_delta(scroll_delta, &position_map.snapshot, window, cx);
                     cx.notify();
                 }
                 SelectionDragState::ReadyToDrag {
@@ -1042,7 +1042,7 @@ impl EditorElement {
                             drop_cursor,
                             hide_drop_cursor: false,
                         };
-                        editor.apply_scroll_delta(scroll_delta, window, cx);
+                        editor.apply_scroll_delta(scroll_delta, &position_map.snapshot, window, cx);
                         cx.notify();
                     } else {
                         let click_point = position_map.point_for_position(*click_position);
@@ -8060,7 +8060,14 @@ impl Element for EditorElement {
                             autoscroll_request.is_some() || editor.has_pending_selection();
 
                         let (needs_horizontal_autoscroll, was_scrolled) = editor
-                            .autoscroll_vertically(bounds, line_height, max_scroll_top, window, cx);
+                            .autoscroll_vertically(
+                                bounds,
+                                line_height,
+                                max_scroll_top,
+                                &snapshot,
+                                window,
+                                cx,
+                            );
                         if was_scrolled.0 {
                             snapshot = editor.snapshot(window, cx);
                         }
@@ -8496,6 +8503,7 @@ impl Element for EditorElement {
                                 scroll_width,
                                 em_advance,
                                 &line_layouts,
+                                &snapshot,
                                 window,
                                 cx,
                             )

crates/editor/src/scroll.rs

@@ -211,10 +211,10 @@ impl ScrollManager {
     fn set_scroll_position(
         &mut self,
         scroll_position: gpui::Point<f32>,
-        map: &DisplaySnapshot,
         local: bool,
         autoscroll: bool,
         workspace_id: Option<WorkspaceId>,
+        display_snapshot: &DisplaySnapshot,
         window: &mut Window,
         cx: &mut Context<Editor>,
     ) -> WasScrolled {
@@ -223,7 +223,7 @@ impl ScrollManager {
             ScrollBeyondLastLine::OnePage => scroll_top,
             ScrollBeyondLastLine::Off => {
                 if let Some(height_in_lines) = self.visible_line_count {
-                    let max_row = map.max_point().row().0 as f32;
+                    let max_row = display_snapshot.max_point().row().0 as f32;
                     scroll_top.min(max_row - height_in_lines + 1.).max(0.)
                 } else {
                     scroll_top
@@ -231,7 +231,7 @@ impl ScrollManager {
             }
             ScrollBeyondLastLine::VerticalScrollMargin => {
                 if let Some(height_in_lines) = self.visible_line_count {
-                    let max_row = map.max_point().row().0 as f32;
+                    let max_row = display_snapshot.max_point().row().0 as f32;
                     scroll_top
                         .min(max_row - height_in_lines + 1. + self.vertical_scroll_margin)
                         .max(0.)
@@ -242,13 +242,13 @@ impl ScrollManager {
         };
 
         let scroll_top_row = DisplayRow(scroll_top as u32);
-        let scroll_top_buffer_point = map
+        let scroll_top_buffer_point = display_snapshot
             .clip_point(
                 DisplayPoint::new(scroll_top_row, scroll_position.x as u32),
                 Bias::Left,
             )
-            .to_point(map);
-        let top_anchor = map
+            .to_point(display_snapshot);
+        let top_anchor = display_snapshot
             .buffer_snapshot
             .anchor_at(scroll_top_buffer_point, Bias::Right);
 
@@ -257,7 +257,7 @@ impl ScrollManager {
                 anchor: top_anchor,
                 offset: point(
                     scroll_position.x.max(0.),
-                    scroll_top - top_anchor.to_display_point(map).row().as_f32(),
+                    scroll_top - top_anchor.to_display_point(display_snapshot).row().as_f32(),
                 ),
             },
             scroll_top_buffer_point.row,
@@ -512,6 +512,7 @@ impl Editor {
     pub fn apply_scroll_delta(
         &mut self,
         scroll_delta: gpui::Point<f32>,
+        display_snapshot: &DisplaySnapshot,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
@@ -519,9 +520,8 @@ impl Editor {
         if self.scroll_manager.forbid_vertical_scroll {
             delta.y = 0.0;
         }
-        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
-        let position = self.scroll_manager.anchor.scroll_position(&display_map) + delta;
-        self.set_scroll_position_taking_display_map(position, true, false, display_map, window, cx);
+        let position = self.scroll_manager.anchor.scroll_position(display_snapshot) + delta;
+        self.set_scroll_position_internal(position, true, false, display_snapshot, window, cx);
     }
 
     pub fn set_scroll_position(
@@ -535,7 +535,17 @@ impl Editor {
             let current_position = self.scroll_position(cx);
             position.y = current_position.y;
         }
-        self.set_scroll_position_internal(position, true, false, window, cx)
+        if let Some(display_snapshot) = self
+            .last_position_map
+            .clone()
+            .as_ref()
+            .map(|position_map| &position_map.snapshot)
+        {
+            self.set_scroll_position_internal(position, true, false, &display_snapshot, window, cx)
+        } else {
+            let display_snapshot = self.display_map.update(cx, |map, cx| map.snapshot(cx));
+            self.set_scroll_position_internal(position, true, false, &display_snapshot, window, cx)
+        }
     }
 
     /// Scrolls so that `row` is at the top of the editor view.
@@ -565,26 +575,7 @@ impl Editor {
         scroll_position: gpui::Point<f32>,
         local: bool,
         autoscroll: bool,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) -> WasScrolled {
-        let map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
-        self.set_scroll_position_taking_display_map(
-            scroll_position,
-            local,
-            autoscroll,
-            map,
-            window,
-            cx,
-        )
-    }
-
-    fn set_scroll_position_taking_display_map(
-        &mut self,
-        scroll_position: gpui::Point<f32>,
-        local: bool,
-        autoscroll: bool,
-        display_map: DisplaySnapshot,
+        display_map: &DisplaySnapshot,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> WasScrolled {
@@ -595,7 +586,7 @@ impl Editor {
             .set_previous_scroll_position(None);
 
         let adjusted_position = if self.scroll_manager.forbid_vertical_scroll {
-            let current_position = self.scroll_manager.anchor.scroll_position(&display_map);
+            let current_position = self.scroll_manager.anchor.scroll_position(display_map);
             gpui::Point::new(scroll_position.x, current_position.y)
         } else {
             scroll_position
@@ -603,10 +594,10 @@ impl Editor {
 
         let editor_was_scrolled = self.scroll_manager.set_scroll_position(
             adjusted_position,
-            &display_map,
             local,
             autoscroll,
             workspace_id,
+            display_map,
             window,
             cx,
         );
@@ -617,8 +608,20 @@ impl Editor {
     }
 
     pub fn scroll_position(&self, cx: &mut Context<Self>) -> gpui::Point<f32> {
-        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
-        self.scroll_manager.anchor.scroll_position(&display_map)
+        self.last_position_map
+            .as_ref()
+            .map(|position_map| {
+                self.scroll_manager
+                    .anchor
+                    .scroll_position(&position_map.snapshot)
+            })
+            .unwrap_or_else(|| {
+                self.scroll_manager.anchor.scroll_position(
+                    &self
+                        .display_map
+                        .update(cx, |display_map, cx| display_map.snapshot(cx)),
+                )
+            })
     }
 
     pub fn set_scroll_anchor(

crates/editor/src/scroll/autoscroll.rs

@@ -1,6 +1,7 @@
 use crate::{
     DisplayRow, Editor, EditorMode, LineWithInvisibles, RowExt, SelectionEffects,
-    display_map::ToDisplayPoint, scroll::WasScrolled,
+    display_map::{DisplaySnapshot, ToDisplayPoint},
+    scroll::WasScrolled,
 };
 use gpui::{Bounds, Context, Pixels, Window, px};
 use language::Point;
@@ -111,13 +112,13 @@ impl Editor {
         bounds: Bounds<Pixels>,
         line_height: Pixels,
         max_scroll_top: f32,
+        display_snapshot: &DisplaySnapshot,
         window: &mut Window,
         cx: &mut Context<Editor>,
     ) -> (NeedsHorizontalAutoscroll, WasScrolled) {
         let viewport_height = bounds.size.height;
         let visible_lines = viewport_height / line_height;
-        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
-        let mut scroll_position = self.scroll_manager.scroll_position(&display_map);
+        let mut scroll_position = self.scroll_manager.scroll_position(display_snapshot);
         let original_y = scroll_position.y;
         if let Some(last_bounds) = self.expect_bounds_change.take() {
             if scroll_position.y != 0. {
@@ -144,7 +145,7 @@ impl Editor {
         let mut target_top;
         let mut target_bottom;
         if let Some(first_highlighted_row) =
-            self.highlighted_display_row_for_autoscroll(&display_map)
+            self.highlighted_display_row_for_autoscroll(display_snapshot)
         {
             target_top = first_highlighted_row.as_f32();
             target_bottom = target_top + 1.;
@@ -155,14 +156,14 @@ impl Editor {
                 .first()
                 .unwrap()
                 .head()
-                .to_display_point(&display_map)
+                .to_display_point(display_snapshot)
                 .row()
                 .as_f32();
             target_bottom = selections
                 .last()
                 .unwrap()
                 .head()
-                .to_display_point(&display_map)
+                .to_display_point(display_snapshot)
                 .row()
                 .next_row()
                 .as_f32();
@@ -179,7 +180,7 @@ impl Editor {
                     .max_by_key(|s| s.id)
                     .unwrap()
                     .head()
-                    .to_display_point(&display_map)
+                    .to_display_point(display_snapshot)
                     .row()
                     .as_f32();
                 target_top = newest_selection_top;
@@ -212,11 +213,11 @@ impl Editor {
             }
         };
         if let Autoscroll::Strategy(_, Some(anchor)) = autoscroll {
-            target_top = anchor.to_display_point(&display_map).row().as_f32();
+            target_top = anchor.to_display_point(display_snapshot).row().as_f32();
             target_bottom = target_top + 1.;
         }
 
-        let was_autoscrolled = match strategy {
+        let needs_autoscroll = match strategy {
             AutoscrollStrategy::Fit | AutoscrollStrategy::Newest => {
                 let margin = margin.min(self.scroll_manager.vertical_scroll_margin);
                 let target_top = (target_top - margin).max(0.0);
@@ -233,39 +234,48 @@ impl Editor {
                     scroll_position.y = target_bottom - visible_lines;
                 }
 
-                if needs_scroll_up ^ needs_scroll_down {
-                    self.set_scroll_position_internal(scroll_position, local, true, window, cx)
-                } else {
-                    WasScrolled(false)
-                }
+                needs_scroll_up ^ needs_scroll_down
             }
             AutoscrollStrategy::Center => {
                 scroll_position.y = (target_top - margin).max(0.0);
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
             AutoscrollStrategy::Focused => {
                 let margin = margin.min(self.scroll_manager.vertical_scroll_margin);
                 scroll_position.y = (target_top - margin).max(0.0);
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
             AutoscrollStrategy::Top => {
                 scroll_position.y = (target_top).max(0.0);
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
             AutoscrollStrategy::Bottom => {
                 scroll_position.y = (target_bottom - visible_lines).max(0.0);
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
             AutoscrollStrategy::TopRelative(lines) => {
                 scroll_position.y = target_top - lines as f32;
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
             AutoscrollStrategy::BottomRelative(lines) => {
                 scroll_position.y = target_bottom + lines as f32;
-                self.set_scroll_position_internal(scroll_position, local, true, window, cx)
+                true
             }
         };
 
+        let was_autoscrolled = needs_autoscroll
+            .then(|| {
+                self.set_scroll_position_internal(
+                    scroll_position,
+                    local,
+                    true,
+                    display_snapshot,
+                    window,
+                    cx,
+                )
+            })
+            .unwrap_or(WasScrolled(false));
+
         self.scroll_manager.last_autoscroll = Some((
             self.scroll_manager.anchor.offset,
             target_top,
@@ -284,29 +294,29 @@ impl Editor {
         scroll_width: Pixels,
         em_advance: Pixels,
         layouts: &[LineWithInvisibles],
+        display_snapshot: &DisplaySnapshot,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Option<gpui::Point<f32>> {
-        let display_map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
         let selections = self.selections.all::<Point>(cx);
-        let mut scroll_position = self.scroll_manager.scroll_position(&display_map);
+        let mut scroll_position = self.scroll_manager.scroll_position(display_snapshot);
 
         let mut target_left;
         let mut target_right;
 
         if self
-            .highlighted_display_row_for_autoscroll(&display_map)
+            .highlighted_display_row_for_autoscroll(display_snapshot)
             .is_none()
         {
             target_left = px(f32::INFINITY);
             target_right = px(0.);
             for selection in selections {
-                let head = selection.head().to_display_point(&display_map);
+                let head = selection.head().to_display_point(display_snapshot);
                 if head.row() >= start_row
                     && head.row() < DisplayRow(start_row.0 + layouts.len() as u32)
                 {
                     let start_column = head.column();
-                    let end_column = cmp::min(display_map.line_len(head.row()), head.column());
+                    let end_column = cmp::min(display_snapshot.line_len(head.row()), head.column());
                     target_left = target_left.min(
                         layouts[head.row().minus(start_row) as usize]
                             .x_for_index(start_column as usize)
@@ -333,21 +343,30 @@ impl Editor {
         let scroll_left = self.scroll_manager.anchor.offset.x * em_advance;
         let scroll_right = scroll_left + viewport_width;
 
-        let was_scrolled = if target_left < scroll_left {
+        let needs_scroll = if target_left < scroll_left {
             scroll_position.x = target_left / em_advance;
-            self.set_scroll_position_internal(scroll_position, true, true, window, cx)
+            true
         } else if target_right > scroll_right {
             scroll_position.x = (target_right - viewport_width) / em_advance;
-            self.set_scroll_position_internal(scroll_position, true, true, window, cx)
+            true
         } else {
-            WasScrolled(false)
+            false
         };
 
-        if was_scrolled.0 {
-            Some(scroll_position)
-        } else {
-            None
-        }
+        let was_scrolled = needs_scroll
+            .then(|| {
+                self.set_scroll_position_internal(
+                    scroll_position,
+                    true,
+                    true,
+                    display_snapshot,
+                    window,
+                    cx,
+                )
+            })
+            .unwrap_or(WasScrolled(false));
+
+        was_scrolled.0.then_some(scroll_position)
     }
 
     pub fn request_autoscroll(&mut self, autoscroll: Autoscroll, cx: &mut Context<Self>) {