X-Git-Url: http://nitlanguage.org

diff --git a/src/model/model_visitor.nit b/src/model/model_visitor.nit
index 3d8a4c7..59d3e61 100644
--- a/src/model/model_visitor.nit
+++ b/src/model/model_visitor.nit
@@ -53,6 +53,7 @@ abstract class ModelVisitor
 	# If `e` is null, nothing is done.
 	fun enter_visit(e: nullable MEntity) do
 		if e == null then return
+		if not accept_mentity(e) then return
 		var old_entity = current_entity
 		current_entity = e
 		visit(e)
@@ -66,6 +67,75 @@ abstract class ModelVisitor
 	#
 	# It should not be called directly but used by `enter_visit`
 	protected fun visit(e: MEntity) is abstract
+
+	# Filter classes and method on the visibility.
+	#
+	# If set, only the classes and method with at least the given
+	# visibility level will be visited.
+	var min_visibility: nullable MVisibility = null is writable
+
+	# Can we accept this `mentity` in the view regarding its visibility?
+	fun accept_visibility(mentity: MEntity): Bool do
+		return mentity.accept_visibility(min_visibility)
+	end
+
+	# Include fictive entities?
+	#
+	# By default, fictive entities (see `MEntity::is_fictive`) are not visited.
+	var include_fictive = false is writable
+
+	# Can we accept this `mentity` in the view regarding its fictivity?
+	fun accept_fictive(mentity: MEntity): Bool do
+		if include_fictive then return true
+		return not mentity.is_fictive
+	end
+
+	# Should we accept mentities with empty documentation?
+	#
+	# Default is `true`.
+	var include_empty_doc = true is writable
+
+	# Can we accept this `mentity` regarding its documentation?
+	fun accept_empty_doc(mentity: MEntity): Bool do
+		if include_empty_doc then return true
+		return mentity.mdoc != null
+	end
+
+	# Should we accept nitunit test suites?
+	#
+	# Default is `false`.
+	var include_test_suite = false is writable
+
+	# Can we accept this `mentity` regarding its test suite status?
+	fun accept_test_suite(mentity: MEntity): Bool do
+		if include_test_suite then return true
+		if not mentity isa MModule then return true
+		return not mentity.is_test_suite
+	end
+
+	# Should we accept `MAttribute` instances?
+	#
+	# Default is `true`.
+	var include_attribute = true is writable
+
+	# Can we accept this `mentity` regarding its type?
+	fun accept_attribute(mentity: MEntity): Bool do
+		if include_attribute then return true
+		if mentity isa MAttribute then return false
+		if mentity isa MAttributeDef then return false
+		return true
+	end
+
+	# Should we accept this `mentity` from the view?
+	fun accept_mentity(mentity: MEntity): Bool do
+		if not accept_visibility(mentity) then return false
+		if not accept_fictive(mentity) then return false
+		if not accept_empty_doc(mentity) then return false
+		if not accept_test_suite(mentity) then return false
+		if not accept_attribute(mentity) then return false
+		return true
+	end
+
 end
 
 redef class MEntity
@@ -73,6 +143,11 @@ redef class MEntity
 	#
 	# See the specific implementation in the subclasses.
 	fun visit_all(v: ModelVisitor) do end
+
+	private fun accept_visibility(min_visibility: nullable MVisibility): Bool do
+		if min_visibility == null then return true
+		return visibility >= min_visibility
+	end
 end
 
 redef class Model