Hide private entries in Component Browser (#7497)

As in description.

Fixes #7464

app/gui/src/controller/searcher.rs

@@ -1229,7 +1229,7 @@ pub mod test {
         searcher.reload_list();
         fixture.test.run_until_stalled();
         // There are two virtual entries and two top-modules.
-        assert_eq!(dbg!(searcher.components().displayed()).len(), 4);
+        assert_eq!(searcher.components().displayed().len(), 4);
 
         let mut subscriber = searcher.subscribe();
         searcher.enter_entry(3).expect("Entering entry failed");

app/gui/src/controller/searcher/component/builder.rs

@@ -13,6 +13,8 @@ use crate::model::suggestion_database;
 use double_representation::name::project::STANDARD_NAMESPACE;
 use double_representation::name::QualifiedName;
 use double_representation::name::QualifiedNameRef;
+use enso_doc_parser::DocSection;
+use enso_doc_parser::Tag;
 use enso_suggestion_database::SuggestionDatabase;
 
 
@@ -238,6 +240,17 @@ impl WhenDisplayed {
         // Currently, the engine does the filtering.
         Self::Always
     }
+
+    fn consider_tags(self, entry: &suggestion_database::Entry) -> Self {
+        let is_private_tag =
+            |doc: &DocSection| matches!(doc, DocSection::Tag { tag: Tag::Private, .. });
+        let is_private = entry.documentation.iter().any(is_private_tag);
+        if is_private {
+            Self::Never
+        } else {
+            self
+        }
+    }
 }
 
 impl<'a> Builder<'a> {
@@ -272,6 +285,7 @@ impl<'a> Builder<'a> {
             None if self.this_type.is_some() => WhenDisplayed::with_self_type(),
             None => WhenDisplayed::in_base_mode(&entry, group_id.is_some()),
         };
+        let when_displayed = when_displayed.consider_tags(&entry);
         let component = Component::new_from_database_entry(id, entry, group_id);
         if matches!(when_displayed, WhenDisplayed::Always) {
             self.built_list.displayed_by_default.push(component.clone());
@@ -338,6 +352,7 @@ mod tests {
     use crate::controller::searcher::component::tests::check_groups;
 
     use double_representation::name::project;
+    use enso_suggestion_database::doc_section;
     use enso_suggestion_database::mock_suggestion_database;
     use ide_view::component_browser::component_list_panel::icon;
 
@@ -348,6 +363,9 @@ mod tests {
                     #[in_group("First Group")]
                     fn fun2() -> Standard.Base.Any;
 
+                    #[with_doc_section(doc_section!(@ Private, ""))]
+                    fn private() -> Standard.Base.Any;
+
                     mod SubModule1 {
                         fn fun4() -> Standard.Base.Any;
                     }
@@ -422,7 +440,8 @@ mod tests {
             "test.Test.TopModule1",
             "test.Test.TopModule2",
         ]);
-        assert_eq!(list.components.len(), database.keys().len());
+        // We subtract a single private component.
+        assert_eq!(list.components.len(), database.keys().len() - 1);
 
         assert_eq!(list.groups.len(), 2);
         check_groups(&list, vec![Some(0), Some(0), Some(0), Some(1), None, None]);

app/gui/suggestion-database/src/mock.rs

@@ -351,6 +351,8 @@ macro_rules! mock_suggestion_database_entries {
 /// Each statement may be preceded by one or more attributes looking like in Rust. The attribute
 /// content is just a call to the [`Entry`] modifier - a method of [`Entry`] taking and returning
 /// modified `self`.
+///
+/// See also [`doc_section!`] macro for defining documentation sections for entries.
 #[macro_export]
 macro_rules! mock_suggestion_database {
     ($($(#[$($attr_setter:tt)*])* $ns:ident.$project:ident { $($content:tt)* })*) => {