support for string parameters in OSL nodes

for now subtype is not defined, but once we start parsing the metadata we can set texture inputs as FILEPATH
also, it takes relative strings and convert to absolute for all strings (which is arguably a good solution, but
should work for now)

1 files changed, 40 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index 9fa5e9a041b..f051148109a 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -108,6 +108,43 @@ static void node_socket_button_default(const bContext *C, uiBlock *block,
 	}
 }
 
+static void node_socket_button_string(const bContext *C, uiBlock *block,
+                                       bNodeTree *ntree, bNode *node, bNodeSocket *sock,
+                                       const char *name, int x, int y, int width)
+{
+	if (sock->link || (sock->flag & SOCK_HIDE_VALUE))
+		node_socket_button_label(C, block, ntree, node, sock, name, x, y, width);
+	else {
+		PointerRNA ptr;
+		uiBut *bt;
+
+		SpaceNode *snode = CTX_wm_space_node(C);
+		const char *ui_name = IFACE_(name);
+		float slen;
+
+		UI_ThemeColor(TH_TEXT);
+		slen = (UI_GetStringWidth(ui_name) + NODE_MARGIN_X) * snode->aspect_sqrt;
+		while (slen > (width * 0.5) && *ui_name) {
+			ui_name = BLI_str_find_next_char_utf8(ui_name, NULL);
+			slen = (UI_GetStringWidth(ui_name) + NODE_MARGIN_X) * snode->aspect_sqrt;
+		}
+
+		RNA_pointer_create(&ntree->id, &RNA_NodeSocket, sock, &ptr);
+		
+		if (name[0] == '\0')
+			slen = 0.0;
+		
+		bt = uiDefButR(block, TEX, B_NODE_EXEC, "",
+		               x, y + 1, width - slen, NODE_DY - 2,
+		               &ptr, "default_value", 0, 0, 0, -1, -1, "");
+		if (node)
+			uiButSetFunc(bt, node_sync_cb, CTX_wm_space_node(C), node);
+		
+		if (slen > 0.0)
+			uiDefBut(block, LABEL, 0, IFACE_(name), x + (width - slen), y + 2, slen, NODE_DY - 2, NULL, 0, 0, 0, 0, "");
+	}
+}
+
 typedef struct SocketComponentMenuArgs {
 	PointerRNA ptr;
 	int x, y, width;
@@ -3136,6 +3173,9 @@ void ED_node_init_butfuncs(void)
 				case SOCK_BOOLEAN:
 					stype->buttonfunc = node_socket_button_default;
 					break;
+				case SOCK_STRING:
+					stype->buttonfunc = node_socket_button_string;
+					break;
 				case SOCK_VECTOR:
 					stype->buttonfunc = node_socket_button_components;
 					break;