Depsgraph: Move RNA lookup to an own query class

Currently should have no functional changes, but allows to
implement runction optimizations more localized and easily.

1 files changed, 61 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_rna.h b/source/blender/depsgraph/intern/builder/deg_builder_rna.h
new file mode 100644
index 00000000000..db0e1cb8dc7
--- /dev/null
+++ b/source/blender/depsgraph/intern/builder/deg_builder_rna.h
@@ -0,0 +1,61 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file \ingroup depsgraph
+ */
+
+#pragma once
+
+struct PointerRNA;
+struct PropertyRNA;
+
+namespace DEG {
+
+struct Depsgraph;
+struct Node;
+
+/* For queries which gives operation node or key defines whether we are
+ * interested in a result of the given property or whether we are linking some
+ * dependency to that property. */
+enum class RNAPointerSource {
+	/* Query will return pointer to an entry operation of component which is
+	 * responsible for evaluation of the given property. */
+	ENTRY,
+	/* Query will return pointer to an exit operation of component which is
+	 * responsible for evaluation of the given property.
+	 * More precisely, it will return operation at which the property is known
+	 * to be evaluated. */
+	EXIT,
+};
+
+/* Helper class which performs optimized lookups of a node within a given
+ * dependency graph which satisfies given RNA pointer or RAN path. */
+class RNANodeQuery {
+public:
+	RNANodeQuery(Depsgraph *depsgraph);
+
+	Node *find_node(const PointerRNA *ptr,
+	                const PropertyRNA *prop,
+	                RNAPointerSource source);
+
+protected:
+	Depsgraph *depsgraph_;
+};
+
+}  // namespace DEG