Hit-testing works again

Author: fschutt

azul-desktop/src/wr_translate.rs

@@ -1644,6 +1644,19 @@ fn push_frame(
         None => WrClipId::root(builder.pipeline_id), // no clipping
     };
 
+    // push the hit-testing tag if any
+    if let Some(hit_tag) = frame.tag {
+        builder.push_hit_test(&WrCommonItemProperties {
+            clip_rect: WrLayoutRect::new(
+                WrLayoutPoint::new(0.0, 0.0),
+                WrLayoutSize::new(frame.size.width, frame.size.height),
+            ),
+            spatial_id: rect_spatial_id,
+            clip_id: parent_clip_id,
+            flags: WrPrimitiveFlags::empty(),
+        }, (hit_tag.0, 0));
+    }
+
     // if let Some(image_mask) -> define_image_mask_clip()
     for child in frame.children {
         push_display_list_msg(document_id, render_api, builder, child, rect_spatial_id, children_clip_id, positioned_items, current_hidpi_factor);
@@ -1712,6 +1725,30 @@ fn push_scroll_frame(
         ),
     );
 
+    // push the scroll hit-testing tag if any
+    builder.push_hit_test(&WrCommonItemProperties {
+        clip_rect: WrLayoutRect::new(
+            WrLayoutPoint::new(0.0, 0.0),
+            WrLayoutSize::new(scroll_frame.content_rect.size.width, scroll_frame.content_rect.size.height),
+        ),
+        spatial_id: scroll_frame_clip_info.spatial_id,
+        clip_id: scroll_frame_clip_info.clip_id,
+        flags: WrPrimitiveFlags::empty(),
+    }, (scroll_frame.scroll_tag.0.0, 0));
+
+    // additionally push the hit tag of the frame if there is any
+    if let Some(hit_tag) = scroll_frame.frame.tag {
+        builder.push_hit_test(&WrCommonItemProperties {
+            clip_rect: WrLayoutRect::new(
+                WrLayoutPoint::new(0.0, 0.0),
+                WrLayoutSize::new(scroll_frame.frame.size.width, scroll_frame.frame.size.height),
+            ),
+            spatial_id: scroll_frame_clip_info.spatial_id,
+            clip_id: scroll_frame_clip_info.clip_id,
+            flags: WrPrimitiveFlags::empty(),
+        }, (hit_tag.0, 0));
+    }
+
     for child in scroll_frame.frame.children {
         push_display_list_msg(
             document_id,