From 6ebf244aced249366a4215787f768fde99523069 Mon Sep 17 00:00:00 2001
From: Joshua Leung <aligorith@gmail.com>
Date: Tue, 5 Dec 2017 17:16:05 +1300
Subject: Added BKE_fcurves_main_cb(), a wrapper around BKE_animdata_main_cb to
 make it easier to apply fixes to all F-Curves in a file

---
 source/blender/blenkernel/BKE_animsys.h     |  8 +++-
 source/blender/blenkernel/intern/anim_sys.c | 68 +++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 1 deletion(-)

(limited to 'source/blender')

diff --git a/source/blender/blenkernel/BKE_animsys.h b/source/blender/blenkernel/BKE_animsys.h
index 534a57765f6..5a9eeb38bc8 100644
--- a/source/blender/blenkernel/BKE_animsys.h
+++ b/source/blender/blenkernel/BKE_animsys.h
@@ -152,9 +152,15 @@ char *BKE_animdata_driver_path_hack(struct bContext *C, struct PointerRNA *ptr,
 /* Define for callback looper used in BKE_animdata_main_cb */
 typedef void (*ID_AnimData_Edit_Callback)(struct ID *id, struct AnimData *adt, void *user_data);
 
+/* Define for callback looper used in BKE_fcurves_main_cb */
+typedef void (*ID_FCurve_Edit_Callback)(struct ID *id, struct FCurve *fcu, void *user_data);
+
 
 /* Loop over all datablocks applying callback */
-void BKE_animdata_main_cb(struct Main *main, ID_AnimData_Edit_Callback func, void *user_data);
+void BKE_animdata_main_cb(struct Main *bmain, ID_AnimData_Edit_Callback func, void *user_data);
+
+/* Loop over all datablocks applying callback to all its F-Curves */
+void BKE_fcurves_main_cb(struct Main *bmain, ID_FCurve_Edit_Callback func, void *user_data);
 
 /* ************************************* */
 // TODO: overrides, remapping, and path-finding api's
diff --git a/source/blender/blenkernel/intern/anim_sys.c b/source/blender/blenkernel/intern/anim_sys.c
index 2e0496b61d7..5aa13cad61d 100644
--- a/source/blender/blenkernel/intern/anim_sys.c
+++ b/source/blender/blenkernel/intern/anim_sys.c
@@ -1011,6 +1011,74 @@ void BKE_animdata_fix_paths_remove(ID *id, const char *prefix)
 	}
 }
 
+
+/* Apply Op to All FCurves in Database --------------------------- */
+
+/* "User-Data" wrapper used by BKE_fcurves_main_cb() */
+typedef struct AllFCurvesCbWrapper {
+	ID_FCurve_Edit_Callback func;  /* Operation to apply on F-Curve */
+	void *user_data;               /* Custom data for that operation */
+} AllFCurvesCbWrapper;
+
+/* Helper for adt_apply_all_fcurves_cb() - Apply wrapped operator to list of F-Curves */
+static void fcurves_apply_cb(ID *id, ListBase *fcurves, ID_FCurve_Edit_Callback func, void *user_data)
+{
+	FCurve *fcu;
+	
+	for (fcu = fcurves->first; fcu; fcu = fcu->next) {
+		func(id, fcu, user_data);
+	}
+}
+
+/* Helper for adt_apply_all_fcurves_cb() - Recursively go through each NLA strip */
+static void nlastrips_apply_all_curves_cb(ID *id, ListBase *strips, AllFCurvesCbWrapper *wrapper)
+{
+	NlaStrip *strip;
+	
+	for (strip = strips->first; strip; strip = strip->next) {
+		/* fix strip's action */
+		if (strip->act) {
+			fcurves_apply_cb(id, &strip->act->curves, wrapper->func, wrapper->user_data);
+		}
+		
+		/* check sub-strips (if metas) */
+		nlastrips_apply_all_curves_cb(id, &strip->strips, wrapper);
+	}
+}
+
+/* Helper for BKE_fcurves_main_cb() - Dispatch wrapped operator to all F-Curves */
+static void adt_apply_all_fcurves_cb(ID *id, AnimData *adt, AllFCurvesCbWrapper *wrapper)
+{
+	NlaTrack *nlt;
+	
+	if (adt->action) {
+		fcurves_apply_cb(id, &adt->action->curves, wrapper->func, wrapper->user_data);
+	}
+	
+	if (adt->tmpact) {
+		fcurves_apply_cb(id, &adt->tmpact->curves, wrapper->func, wrapper->user_data);
+	}
+	
+	/* free drivers - stored as a list of F-Curves */
+	fcurves_apply_cb(id, &adt->drivers, wrapper->func, wrapper->user_data);
+	
+	/* NLA Data - Animation Data for Strips */
+	for (nlt = adt->nla_tracks.first; nlt; nlt = nlt->next) {
+		nlastrips_apply_all_curves_cb(id, &nlt->strips, wrapper);
+	}
+}
+
+/* apply the given callback function on all F-Curves attached to data in main database */
+void BKE_fcurves_main_cb(Main *mainptr, ID_FCurve_Edit_Callback func, void *user_data)
+{
+	/* Wrap F-Curve operation stuff to pass to the general AnimData-level func */
+	AllFCurvesCbWrapper wrapper = {func, user_data};
+	
+	/* Use the AnimData-based function so that we don't have to reimplement all that stuff */
+	BKE_animdata_main_cb(mainptr, adt_apply_all_fcurves_cb, &wrapper);
+}
+
+
 /* Whole Database Ops -------------------------------------------- */
 
 /* apply the given callback function on all data in main database */
-- 
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