🐛 Fix text drag

render-wasm/src/render.rs

@@ -386,6 +386,7 @@ pub(crate) struct RenderState {
     /// GPU crops from `Backbuffer` keyed by shape id. Filled on full-frame completion; during
     /// drag, entries for the moved top-level selection are ensured here
     pub backbuffer_crop_cache: HashMap<Uuid, InteractiveDragCrop>,
+    pub last_full_render_drawn: HashSet<Uuid>,
 }
 
 pub struct InteractiveDragCrop {
@@ -542,6 +543,7 @@ impl RenderState {
             current_tile_had_shapes: false,
             interactive_target_seeded: false,
             backbuffer_crop_cache: HashMap::default(),
+            last_full_render_drawn: HashSet::default(),
         })
     }
 
@@ -1668,6 +1670,10 @@ impl RenderState {
                 continue;
             }
 
+            if !shape.all_text_descendants_drawn(tree, &self.last_full_render_drawn) {
+                continue;
+            }
+
             candidates.push((shape.id, doc_bounds, selrect));
         }
 
@@ -1953,6 +1959,7 @@ impl RenderState {
         } else {
             self.reset_canvas();
             self.interactive_target_seeded = false;
+            self.last_full_render_drawn.clear();
         }
 
         let surface_ids = SurfaceId::Strokes as u32
@@ -3154,6 +3161,10 @@ impl RenderState {
                     target_surface,
                 )?;
 
+                if !self.options.is_interactive_transform() && !export {
+                    self.last_full_render_drawn.insert(node_id);
+                }
+
                 self.surfaces
                     .canvas(SurfaceId::DropShadows)
                     .clear(skia::Color::TRANSPARENT);

render-wasm/src/shapes.rs

@@ -1386,6 +1386,28 @@ impl Shape {
         }
     }
 
+    pub fn all_text_descendants_drawn(
+        &self,
+        shapes_pool: ShapesPoolRef,
+        drawn: &HashSet<Uuid>,
+    ) -> bool {
+        for child_id in self.children_ids_iter(false) {
+            let Some(child) = shapes_pool.get(child_id) else {
+                continue;
+            };
+            if child.hidden {
+                continue;
+            }
+            if matches!(child.shape_type, Type::Text(_)) && !drawn.contains(child_id) {
+                return false;
+            }
+            if !child.all_text_descendants_drawn(shapes_pool, drawn) {
+                return false;
+            }
+        }
+        true
+    }
+
     /// Whether this shape may use the backbuffer crop fast path during interactive drag.
     ///
     /// Conservative: only effects and fills that match what we snapshot and clip in