Cleanup: Nodes: Begin splitting shader node buttons into individual files

Currently, most node buttons are defined in `drawnode.cc` however,
this is inconvenient because it requires editing many files when adding new nodes.
The goal is to minimize the number of files needed to add or update a node.

This commit moves most of the node layout functions for shader nodes into their respected
source/blender/nodes/shader/nodes file.

In the future, these functions will be simplified to node_layout.

Some nodes were left in `drawnode.cc` as this would require duplicating code
while this is likely fine it is best to leave that to a seperate commit.

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/nodes/shader/nodes/node_shader_map_range.cc b/source/blender/nodes/shader/nodes/node_shader_map_range.cc
index c4527fd3420..71adf607869 100644
--- a/source/blender/nodes/shader/nodes/node_shader_map_range.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_map_range.cc
@@ -29,6 +29,9 @@
 
 #include "NOD_socket_search_link.hh"
 
+#include "UI_interface.h"
+#include "UI_resources.h"
+
 namespace blender::nodes::node_shader_map_range_cc {
 
 NODE_STORAGE_FUNCS(NodeMapRange)
@@ -52,6 +55,17 @@ static void sh_node_map_range_declare(NodeDeclarationBuilder &b)
   b.add_output<decl::Vector>(N_("Vector"));
 };
 
+static void node_shader_buts_map_range(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "data_type", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
+  uiItemR(layout, ptr, "interpolation_type", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
+  if (!ELEM(RNA_enum_get(ptr, "interpolation_type"),
+            NODE_MAP_RANGE_SMOOTHSTEP,
+            NODE_MAP_RANGE_SMOOTHERSTEP)) {
+    uiItemR(layout, ptr, "clamp", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
+  }
+}
+
 static void node_shader_update_map_range(bNodeTree *ntree, bNode *node)
 {
   const NodeMapRange &storage = node_storage(*node);
@@ -650,6 +664,7 @@ void register_node_type_sh_map_range()
 
   sh_fn_node_type_base(&ntype, SH_NODE_MAP_RANGE, "Map Range", NODE_CLASS_CONVERTER);
   ntype.declare = file_ns::sh_node_map_range_declare;
+  ntype.draw_buttons = file_ns::node_shader_buts_map_range;
   node_type_init(&ntype, file_ns::node_shader_init_map_range);
   node_type_storage(
       &ntype, "NodeMapRange", node_free_standard_storage, node_copy_standard_storage);