More context menu 7: cleanup (#5456)

### What

NOTE: review commit by commit (first commit is pure refactoring).

Final PR in the series. This PR:
- split `actions.rs` into many sub-files
- fix capitalisation in some menu item
- split the release check list in small checks

Full series:
- #5392
- #5397
- #5407
- #5411
- #5422
- #5433
- #5456

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [x] I've included a screenshot or gif (if applicable)
* [x] I have tested the web demo (if applicable):
* Using newly built examples:
[app.rerun.io](https://app.rerun.io/pr/5456/index.html)
* Using examples from latest `main` build:
[app.rerun.io](https://app.rerun.io/pr/5456/index.html?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[app.rerun.io](https://app.rerun.io/pr/5456/index.html?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
* [x] The PR title and labels are set such as to maximize their
usefulness for the next release's CHANGELOG
* [x] If applicable, add a new check to the [release
checklist](https://github.com/rerun-io/rerun/blob/main/tests/python/release_checklist)!

- [PR Build Summary](https://build.rerun.io/pr/5456)
- [Docs
preview](https://rerun.io/preview/a36360f586494f6648fdc4bbb9d806ab12911358/docs)
<!--DOCS-PREVIEW-->
- [Examples
preview](https://rerun.io/preview/a36360f586494f6648fdc4bbb9d806ab12911358/examples)
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- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
- [Wasm size tracking](https://build.rerun.io/graphs/sizes.html)

crates/re_viewport/src/context_menu/actions/add_container.rs

@@ -0,0 +1,35 @@
+use re_viewer_context::{ContainerId, Item};
+
+use crate::context_menu::{ContextMenuAction, ContextMenuContext};
+
+/// Add a container of a specific type
+pub(crate) struct AddContainerAction(pub egui_tiles::ContainerKind);
+
+impl ContextMenuAction for AddContainerAction {
+    fn supports_selection(&self, ctx: &ContextMenuContext<'_>) -> bool {
+        if let Some(Item::Container(container_id)) = ctx.selection.single_item() {
+            if let Some(container) = ctx.viewport_blueprint.container(container_id) {
+                // same-kind linear containers cannot be nested
+                (container.container_kind != egui_tiles::ContainerKind::Vertical
+                    && container.container_kind != egui_tiles::ContainerKind::Horizontal)
+                    || container.container_kind != self.0
+            } else {
+                // unknown container
+                false
+            }
+        } else {
+            false
+        }
+    }
+
+    fn label(&self, _ctx: &ContextMenuContext<'_>) -> String {
+        format!("{:?}", self.0)
+    }
+
+    fn process_container(&self, ctx: &ContextMenuContext<'_>, container_id: &ContainerId) {
+        ctx.viewport_blueprint
+            .add_container(self.0, Some(*container_id));
+        ctx.viewport_blueprint
+            .mark_user_interaction(ctx.viewer_context);
+    }
+}

crates/re_viewport/src/context_menu/actions/add_entities_to_new_space_view.rs

@@ -0,0 +1,175 @@
+use egui::{Response, Ui};
+use itertools::Itertools;
+use nohash_hasher::IntSet;
+
+use re_log_types::{EntityPath, EntityPathFilter, EntityPathRule, RuleEffect};
+use re_space_view::{determine_visualizable_entities, SpaceViewBlueprint};
+use re_viewer_context::{Item, SpaceViewClassIdentifier};
+
+use crate::context_menu::{ContextMenuAction, ContextMenuContext};
+
+/// Create a new space view containing the selected entities.
+///
+/// The space view is created next to the clicked item's parent view (if a data result was clicked).
+pub(crate) struct AddEntitiesToNewSpaceViewAction;
+
+impl ContextMenuAction for AddEntitiesToNewSpaceViewAction {
+    fn supports_multi_selection(&self, _ctx: &ContextMenuContext<'_>) -> bool {
+        true
+    }
+
+    fn supports_item(&self, _ctx: &ContextMenuContext<'_>, item: &Item) -> bool {
+        matches!(item, Item::DataResult(_, _) | Item::InstancePath(_))
+    }
+
+    fn ui(&self, ctx: &ContextMenuContext<'_>, ui: &mut Ui) -> Response {
+        let space_view_class_registry = ctx.viewer_context.space_view_class_registry;
+
+        let recommended_space_view_classes = recommended_space_views_for_selection(ctx);
+        let other_space_view_classes: IntSet<_> = space_view_class_registry
+            .iter_registry()
+            .map(|entry| entry.class.identifier())
+            .collect::<IntSet<SpaceViewClassIdentifier>>()
+            .difference(&recommended_space_view_classes)
+            .cloned()
+            .collect();
+
+        ui.menu_button("Add to new Space View", |ui| {
+            let buttons_for_space_view_classes =
+                |ui: &mut egui::Ui, space_view_classes: &IntSet<SpaceViewClassIdentifier>| {
+                    for (identifier, display_name) in space_view_classes
+                        .iter()
+                        .map(|identifier| {
+                            (
+                                identifier,
+                                space_view_class_registry
+                                    .get_class_or_log_error(identifier)
+                                    .display_name(),
+                            )
+                        })
+                        .sorted_by_key(|(_, display_name)| display_name.to_owned())
+                    {
+                        if ui.button(display_name).clicked() {
+                            create_space_view_for_selected_entities(ctx, *identifier);
+                            ui.close_menu();
+                        }
+                    }
+                };
+
+            ui.label(egui::WidgetText::from("Recommended:").italics());
+            if recommended_space_view_classes.is_empty() {
+                ui.label("None");
+            } else {
+                buttons_for_space_view_classes(ui, &recommended_space_view_classes);
+            }
+
+            if !other_space_view_classes.is_empty() {
+                ui.label(egui::WidgetText::from("Others:").italics());
+                buttons_for_space_view_classes(ui, &other_space_view_classes);
+            }
+        })
+        .response
+    }
+}
+
+/// Builds a list of compatible space views for the provided selection.
+fn recommended_space_views_for_selection(
+    ctx: &ContextMenuContext<'_>,
+) -> IntSet<SpaceViewClassIdentifier> {
+    re_tracing::profile_function!();
+
+    let entities_of_interest = ctx
+        .selection
+        .iter()
+        .filter_map(|(item, _)| item.entity_path().cloned())
+        .collect::<IntSet<_>>();
+
+    let mut output: IntSet<SpaceViewClassIdentifier> = IntSet::default();
+
+    let space_view_class_registry = ctx.viewer_context.space_view_class_registry;
+    let entity_db = ctx.viewer_context.entity_db;
+    let applicable_entities_per_visualizer =
+        space_view_class_registry.applicable_entities_for_visualizer_systems(entity_db.store_id());
+
+    for entry in space_view_class_registry.iter_registry() {
+        let Some(suggested_root) = entry
+            .class
+            .recommended_root_for_entities(&entities_of_interest, entity_db)
+        else {
+            continue;
+        };
+
+        let visualizable_entities = determine_visualizable_entities(
+            &applicable_entities_per_visualizer,
+            entity_db,
+            &space_view_class_registry.new_visualizer_collection(entry.class.identifier()),
+            &*entry.class,
+            &suggested_root,
+        );
+
+        // We consider a space view class to be recommended if all selected entities are
+        // "visualizable" with it. By "visualizable" we mean that either the entity itself, or any
+        // of its sub-entities, are visualizable.
+
+        let covered = entities_of_interest.iter().all(|entity| {
+            visualizable_entities.0.iter().any(|(_, entities)| {
+                entities
+                    .0
+                    .iter()
+                    .any(|visualizable_entity| visualizable_entity.starts_with(entity))
+            })
+        });
+
+        if covered {
+            output.insert(entry.class.identifier());
+        }
+    }
+
+    output
+}
+
+/// Creates a space view of the given class, with root set as origin, and a filter set to include all
+/// selected entities. Then, the selection is set to the new space view.
+fn create_space_view_for_selected_entities(
+    ctx: &ContextMenuContext<'_>,
+    identifier: SpaceViewClassIdentifier,
+) {
+    let entities_of_interest = ctx
+        .selection
+        .iter()
+        .filter_map(|(item, _)| item.entity_path().cloned())
+        .collect::<IntSet<_>>();
+
+    let origin = ctx
+        .viewer_context
+        .space_view_class_registry
+        .get_class_or_log_error(&identifier)
+        .recommended_root_for_entities(&entities_of_interest, ctx.viewer_context.entity_db)
+        .unwrap_or_else(EntityPath::root);
+
+    let mut filter = EntityPathFilter::default();
+
+    for path in entities_of_interest {
+        filter.add_rule(RuleEffect::Include, EntityPathRule::including_subtree(path));
+    }
+
+    let target_container_id = ctx
+        .clicked_item_enclosing_container_id_and_position()
+        .map(|(id, _)| id);
+
+    let space_view = SpaceViewBlueprint::new(identifier, &origin, filter);
+
+    let new_space_view = ctx.viewport_blueprint.add_space_views(
+        std::iter::once(space_view),
+        ctx.viewer_context,
+        target_container_id,
+        None,
+    );
+    if let Some(space_view_id) = new_space_view.first() {
+        ctx.viewer_context
+            .selection_state()
+            .set_selection(Item::SpaceView(*space_view_id));
+    }
+    ctx.viewport_blueprint
+        .mark_user_interaction(ctx.viewer_context);
+}

crates/re_viewport/src/context_menu/actions/add_space_view.rs

@@ -0,0 +1,36 @@
+use re_log_types::{EntityPath, EntityPathFilter};
+use re_space_view::SpaceViewBlueprint;
+use re_viewer_context::{ContainerId, Item, SpaceViewClassIdentifier};
+
+use crate::context_menu::{ContextMenuAction, ContextMenuContext};
+
+/// Add a space view of the specific class
+pub(crate) struct AddSpaceViewAction(pub SpaceViewClassIdentifier);
+
+impl ContextMenuAction for AddSpaceViewAction {
+    fn supports_item(&self, _ctx: &ContextMenuContext<'_>, item: &Item) -> bool {
+        matches!(item, Item::Container(_))
+    }
+
+    fn label(&self, ctx: &ContextMenuContext<'_>) -> String {
+        ctx.viewer_context
+            .space_view_class_registry
+            .get_class_or_log_error(&self.0)
+            .display_name()
+            .to_owned()
+    }
+
+    fn process_container(&self, ctx: &ContextMenuContext<'_>, container_id: &ContainerId) {
+        let space_view =
+            SpaceViewBlueprint::new(self.0, &EntityPath::root(), EntityPathFilter::default());
+
+        ctx.viewport_blueprint.add_space_views(
+            std::iter::once(space_view),
+            ctx.viewer_context,
+            Some(*container_id),
+            None,
+        );
+        ctx.viewport_blueprint
+            .mark_user_interaction(ctx.viewer_context);
+    }
+}

crates/re_viewport/src/context_menu/actions/clone_space_view.rs

@@ -0,0 +1,29 @@
+use re_viewer_context::{Item, SpaceViewId};
+
+use crate::context_menu::{ContextMenuAction, ContextMenuContext};
+
+/// Clone a single space view
+pub(crate) struct CloneSpaceViewAction;
+
+impl ContextMenuAction for CloneSpaceViewAction {
+    fn supports_item(&self, _ctx: &ContextMenuContext<'_>, item: &Item) -> bool {
+        matches!(item, Item::SpaceView(_))
+    }
+
+    fn label(&self, _ctx: &ContextMenuContext<'_>) -> String {
+        "Clone".to_owned()
+    }
+
+    fn process_space_view(&self, ctx: &ContextMenuContext<'_>, space_view_id: &SpaceViewId) {
+        if let Some(new_space_view_id) = ctx
+            .viewport_blueprint
+            .duplicate_space_view(space_view_id, ctx.viewer_context)
+        {
+            ctx.viewer_context
+                .selection_state()
+                .set_selection(Item::SpaceView(new_space_view_id));
+            ctx.viewport_blueprint
+                .mark_user_interaction(ctx.viewer_context);
+        }
+    }
+}