Blender file selector support for setting multiple selected files/dirs which operators can use.

This allows the sequencers Add-Image strip to work like it does in 2.4x.

- as well as setting the "filename" operator property, operators can have collections called "files" and "dirs" which are set when available.
- RNA_OperatorFileListElement as new collection type, its a bit redundant since each item only has a "name" property but its needed since we don't have a string array type.
- the file selector now prints operators it runs.

Tested with python, adding a list of images works to the sequencer works.
bpy.ops.SEQUENCER_OT_image_strip_add(name="MyImages", start_frame=54, channel=2, filename="/somedir/", replace_sel=True, files=[{"name":"test1.png"}, {"name":"test2.png"}])

1 files changed, 6 insertions, 1 deletions

diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index fc0f1496c6a..53f70f6ab8f 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -826,7 +826,12 @@ static int wm_handler_fileselect_call(bContext *C, ListBase *handlers, wmEventHa
 						uiPupMenuSaveOver(C, handler->op, path);
 					}
 					else {
-						handler->op->type->exec(C, handler->op);
+						int retval= handler->op->type->exec(C, handler->op);
+						
+						if (retval & OPERATOR_FINISHED)
+							if(G.f & G_DEBUG)
+								wm_operator_print(handler->op);
+						
 						WM_operator_free(handler->op);
 					}