ID-Remap, step two: add some user-level tools.

This commit adds operators and Outliner menu entries to reload or relocate a library,
and to delete or replace a datablock.

RNA ID API is also extended to allow ID deletion and remapping from python.

Review task: D2027 (https://developer.blender.org/D2027).
Reviewed by campbellbarton, thanks a bunch.

4 files changed, 405 insertions, 53 deletions

diff --git a/source/blender/editors/space_outliner/outliner_edit.c b/source/blender/editors/space_outliner/outliner_edit.c
index 8cee696b2ac..687869ae727 100644
--- a/source/blender/editors/space_outliner/outliner_edit.c
+++ b/source/blender/editors/space_outliner/outliner_edit.c
@@ -29,17 +29,23 @@
  *  \ingroup spoutliner
  */
 
+#include <string.h>
+
 #include "MEM_guardedalloc.h"
 
 #include "DNA_anim_types.h"
 #include "DNA_group_types.h"
+#include "DNA_ID.h"
 #include "DNA_scene_types.h"
 #include "DNA_object_types.h"
 #include "DNA_material_types.h"
 
 #include "BLI_blenlib.h"
 #include "BLI_utildefines.h"
+#include "BLI_path_util.h"
 #include "BLI_mempool.h"
+#include "BLI_stack.h"
+#include "BLI_string.h"
 
 #include "BLT_translation.h"
 
@@ -47,7 +53,9 @@
 #include "BKE_context.h"
 #include "BKE_depsgraph.h"
 #include "BKE_global.h"
+#include "BKE_idcode.h"
 #include "BKE_library.h"
+#include "BKE_library_remap.h"
 #include "BKE_main.h"
 #include "BKE_outliner_treehash.h"
 #include "BKE_report.h"
@@ -55,6 +63,8 @@
 #include "BKE_material.h"
 #include "BKE_group.h"
 
+#include "../blenloader/BLO_readfile.h"
+
 #include "ED_object.h"
 #include "ED_outliner.h"
 #include "ED_screen.h"
@@ -70,6 +80,9 @@
 
 #include "RNA_access.h"
 #include "RNA_define.h"
+#include "RNA_enum_types.h"
+
+#include "GPU_material.h"
 
 #include "outliner_intern.h"
 
@@ -291,64 +304,294 @@ void OUTLINER_OT_item_rename(wmOperatorType *ot)
 	ot->poll = ED_operator_outliner_active;
 }
 
-/* Library delete --------------------------------------------------- */
+/* ID delete --------------------------------------------------- */
 
-static void lib_delete(bContext *C, TreeElement *te, TreeStoreElem *tselem, ReportList *reports)
+static void id_delete(bContext *C, TreeElement *te, TreeStoreElem *tselem)
 {
-	Library *lib = (Library *)tselem->id;
-	ListBase *lbarray[MAX_LIBARRAY];
-	int a;
+	Main *bmain = CTX_data_main(C);
+	ID *id = tselem->id;
 
-	BLI_assert(te->idcode == ID_LI && lib != NULL);
+	BLI_assert(te->idcode != 0 && id != NULL);
+	BLI_assert(te->idcode != ID_LI || ((Library *)id)->parent == NULL);
 	UNUSED_VARS_NDEBUG(te);
 
-	/* We simply set all ID from given lib (including lib itself) to zero user count.
-	 * It is not possible to do a proper cleanup without a save/reload in current master. */
-	a = set_listbasepointers(CTX_data_main(C), lbarray);
-	while (a--) {
-		ListBase *lb = lbarray[a];
-		ID *id;
-
-		for (id = lb->first; id; id = id->next) {
-			if (id->lib == lib) {
-				id_fake_user_clear(id);
-				id->us = 0;
+	BKE_libblock_delete(bmain, id);
+
+	WM_event_add_notifier(C, NC_WINDOW, NULL);
+}
+
+void id_delete_cb(
+        bContext *C, Scene *UNUSED(scene), TreeElement *te, TreeStoreElem *UNUSED(tsep), TreeStoreElem *tselem,
+        void *UNUSED(user_data))
+{
+	id_delete(C, te, tselem);
+}
+
+static int outliner_id_delete_invoke_do(bContext *C, ReportList *reports, TreeElement *te, const float mval[2])
+{
+	if (mval[1] > te->ys && mval[1] < te->ys + UI_UNIT_Y) {
+		TreeStoreElem *tselem = TREESTORE(te);
+
+		if (te->idcode != 0 && tselem->id) {
+			if (te->idcode == ID_LI && ((Library *)tselem->id)->parent) {
+				BKE_reportf(reports, RPT_ERROR_INVALID_INPUT,
+				            "Cannot delete indirectly linked library '%s'", ((Library *)tselem->id)->filepath);
+				return OPERATOR_CANCELLED;
+			}
+			id_delete(C, te, tselem);
+			return OPERATOR_FINISHED;
+		}
+	}
+	else {
+		for (te = te->subtree.first; te; te = te->next) {
+			int ret;
+			if ((ret = outliner_id_delete_invoke_do(C, reports, te, mval))) {
+				return ret;
 			}
 		}
 	}
 
-	BKE_reportf(reports, RPT_WARNING,
-	            "Please save and reload .blend file to complete deletion of '%s' library",
-	            ((Library *)tselem->id)->filepath);
+	return 0;
 }
 
-void lib_delete_cb(
-        bContext *C, Scene *UNUSED(scene), TreeElement *te,
+static int outliner_id_delete_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+	ARegion *ar = CTX_wm_region(C);
+	SpaceOops *soops = CTX_wm_space_outliner(C);
+	TreeElement *te;
+	float fmval[2];
+
+	BLI_assert(ar && soops);
+
+	UI_view2d_region_to_view(&ar->v2d, event->mval[0], event->mval[1], &fmval[0], &fmval[1]);
+
+	for (te = soops->tree.first; te; te = te->next) {
+		int ret;
+
+		if ((ret = outliner_id_delete_invoke_do(C, op->reports, te, fmval))) {
+			return ret;
+		}
+	}
+
+	return OPERATOR_CANCELLED;
+}
+
+void OUTLINER_OT_id_delete(wmOperatorType *ot)
+{
+	ot->name = "Delete Datablock";
+	ot->idname = "OUTLINER_OT_id_delete";
+	ot->description = "Delete the ID under cursor";
+
+	ot->invoke = outliner_id_delete_invoke;
+	ot->poll = ED_operator_outliner_active;
+}
+
+/* ID remap --------------------------------------------------- */
+
+static int outliner_id_remap_exec(bContext *C, wmOperator *op)
+{
+	Main *bmain = CTX_data_main(C);
+	Scene *scene = CTX_data_scene(C);
+	SpaceOops *soops = CTX_wm_space_outliner(C);
+
+	const short id_type = (short)RNA_enum_get(op->ptr, "id_type");
+	ID *old_id = BLI_findlink(which_libbase(CTX_data_main(C), id_type), RNA_enum_get(op->ptr, "old_id"));
+	ID *new_id = BLI_findlink(which_libbase(CTX_data_main(C), id_type), RNA_enum_get(op->ptr, "new_id"));
+
+	/* check for invalid states */
+	if (soops == NULL)
+		return OPERATOR_CANCELLED;
+
+	if (!(old_id && (old_id != new_id) && (GS(old_id->name) == GS(new_id->name)))) {
+		return OPERATOR_CANCELLED;
+	}
+
+	BKE_libblock_remap(bmain, old_id, new_id,
+					   ID_REMAP_SKIP_INDIRECT_USAGE | ID_REMAP_SKIP_NEVER_NULL_USAGE);
+
+	BKE_main_lib_objects_recalc_all(bmain);
+
+	/* recreate dependency graph to include new objects */
+	DAG_scene_relations_rebuild(bmain, scene);
+
+	/* free gpu materials, some materials depend on existing objects, such as lamps so freeing correctly refreshes */
+	GPU_materials_free();
+
+	WM_event_add_notifier(C, NC_WINDOW, NULL);
+
+	return OPERATOR_FINISHED;
+}
+
+static bool outliner_id_remap_find_tree_element(bContext *C, wmOperator *op, ListBase *tree, const float y)
+{
+	TreeElement *te;
+
+	for (te = tree->first; te; te = te->next) {
+		if (y > te->ys && y < te->ys + UI_UNIT_Y) {
+			TreeStoreElem *tselem = TREESTORE(te);
+
+			if (tselem->type == 0 && tselem->id) {
+				printf("found id %s (%p)!\n", tselem->id->name, tselem->id);
+
+				RNA_enum_set(op->ptr, "id_type", GS(tselem->id->name));
+				RNA_enum_set_identifier(C, op->ptr, "new_id", tselem->id->name + 2);
+				RNA_enum_set_identifier(C, op->ptr, "old_id", tselem->id->name + 2);
+				return true;
+			}
+		}
+		if (outliner_id_remap_find_tree_element(C, op, &te->subtree, y)) {
+			return true;
+		}
+	}
+	return false;
+}
+
+static int outliner_id_remap_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+	SpaceOops *soops = CTX_wm_space_outliner(C);
+	ARegion *ar = CTX_wm_region(C);
+	float fmval[2];
+
+	if (!RNA_property_is_set(op->ptr, RNA_struct_find_property(op->ptr, "id_type"))) {
+		UI_view2d_region_to_view(&ar->v2d, event->mval[0], event->mval[1], &fmval[0], &fmval[1]);
+
+		outliner_id_remap_find_tree_element(C, op, &soops->tree, fmval[1]);
+	}
+
+	return WM_operator_props_dialog_popup(C, op, 200, 100);
+}
+
+static EnumPropertyItem *outliner_id_itemf(bContext *C, PointerRNA *ptr, PropertyRNA *UNUSED(prop), bool *r_free)
+{
+	EnumPropertyItem item_tmp = {0}, *item = NULL;
+	int totitem = 0;
+	int i = 0;
+
+	short id_type = (short)RNA_enum_get(ptr, "id_type");
+	ID *id = which_libbase(CTX_data_main(C), id_type)->first;
+
+	for (; id; id = id->next) {
+		item_tmp.identifier = item_tmp.name = id->name + 2;
+		item_tmp.value = i++;
+		RNA_enum_item_add(&item, &totitem, &item_tmp);
+	}
+
+	RNA_enum_item_end(&item, &totitem);
+	*r_free = true;
+
+	return item;
+}
+
+void OUTLINER_OT_id_remap(wmOperatorType *ot)
+{
+	PropertyRNA *prop;
+
+	/* identifiers */
+	ot->name = "Outliner ID data Remap";
+	ot->idname = "OUTLINER_OT_id_remap";
+	ot->description = "";
+
+	/* callbacks */
+	ot->invoke = outliner_id_remap_invoke;
+	ot->exec = outliner_id_remap_exec;
+	ot->poll = ED_operator_outliner_active;
+
+	ot->flag = 0;
+
+	RNA_def_enum(ot->srna, "id_type", rna_enum_id_type_items, ID_OB, "ID Type", "");
+
+	prop = RNA_def_enum(ot->srna, "old_id", DummyRNA_NULL_items, 0, "Old ID", "Old ID to replace");
+	RNA_def_property_enum_funcs_runtime(prop, NULL, NULL, outliner_id_itemf);
+	RNA_def_property_flag(prop, PROP_ENUM_NO_TRANSLATE | PROP_HIDDEN);
+
+	ot->prop = RNA_def_enum(ot->srna, "new_id", DummyRNA_NULL_items, 0,
+	                        "New ID", "New ID to remap all selected IDs' users to");
+	RNA_def_property_enum_funcs_runtime(ot->prop, NULL, NULL, outliner_id_itemf);
+	RNA_def_property_flag(ot->prop, PROP_ENUM_NO_TRANSLATE);
+}
+
+void id_remap_cb(
+        bContext *C, Scene *UNUSED(scene), TreeElement *UNUSED(te),
         TreeStoreElem *UNUSED(tsep), TreeStoreElem *tselem, void *UNUSED(user_data))
 {
-	lib_delete(C, te, tselem, CTX_wm_reports(C));
+	wmOperatorType *ot = WM_operatortype_find("OUTLINER_OT_id_remap", false);
+	PointerRNA op_props;
+
+	BLI_assert(tselem->id != NULL);
+
+	WM_operator_properties_create_ptr(&op_props, ot);
+
+	RNA_enum_set(&op_props, "id_type", GS(tselem->id->name));
+	RNA_enum_set_identifier(C, &op_props, "old_id", tselem->id->name + 2);
+
+	WM_operator_name_call_ptr(C, ot, WM_OP_INVOKE_DEFAULT, &op_props);
+
+	WM_operator_properties_free(&op_props);
 }
 
-static int outliner_lib_delete_invoke_do(bContext *C, ReportList *reports, TreeElement *te, const float mval[2])
+/* Library relocate/reload --------------------------------------------------- */
+
+static int lib_relocate(
+		bContext *C, TreeElement *te, TreeStoreElem *tselem, wmOperatorType *ot, const bool reload)
+{
+	PointerRNA op_props;
+	int ret = 0;
+
+	BLI_assert(te->idcode == ID_LI && tselem->id != NULL);
+	UNUSED_VARS_NDEBUG(te);
+
+	WM_operator_properties_create_ptr(&op_props, ot);
+
+	RNA_string_set(&op_props, "library", tselem->id->name + 2);
+
+	if (reload) {
+		Library *lib = (Library *)tselem->id;
+		char dir[FILE_MAXDIR], filename[FILE_MAX];
+
+		BLI_split_dirfile(lib->filepath, dir, filename, sizeof(dir), sizeof(filename));
+
+		printf("%s, %s\n", tselem->id->name, lib->filepath);
+
+		/* We assume if both paths in lib are not the same then lib->name was relative... */
+		RNA_boolean_set(&op_props, "relative_path", BLI_path_cmp(lib->filepath, lib->name) != 0);
+
+		RNA_string_set(&op_props, "directory", dir);
+		RNA_string_set(&op_props, "filename", filename);
+
+		ret = WM_operator_name_call_ptr(C, ot, WM_OP_EXEC_DEFAULT, &op_props);
+	}
+	else {
+		ret = WM_operator_name_call_ptr(C, ot, WM_OP_INVOKE_DEFAULT, &op_props);
+	}
+
+	WM_operator_properties_free(&op_props);
+
+	return ret;
+}
+
+static int outliner_lib_relocate_invoke_do(
+		bContext *C, ReportList *reports, TreeElement *te, const float mval[2], const bool reload)
 {
 	if (mval[1] > te->ys && mval[1] < te->ys + UI_UNIT_Y) {
 		TreeStoreElem *tselem = TREESTORE(te);
 
 		if (te->idcode == ID_LI && tselem->id) {
-			if (((Library *)tselem->id)->parent) {
+			if (((Library *)tselem->id)->parent && !reload) {
 				BKE_reportf(reports, RPT_ERROR_INVALID_INPUT,
-				            "Cannot delete indirectly linked library '%s'", ((Library *)tselem->id)->filepath);
+				            "Cannot relocate indirectly linked library '%s'", ((Library *)tselem->id)->filepath);
 				return OPERATOR_CANCELLED;
 			}
+			else {
+				wmOperatorType *ot = WM_operatortype_find(reload ? "WM_OT_lib_reload" : "WM_OT_lib_relocate", false);
 
-			lib_delete(C, te, tselem, reports);
-			return OPERATOR_FINISHED;
+				return lib_relocate(C, te, tselem, ot, reload);
+			}
 		}
 	}
 	else {
 		for (te = te->subtree.first; te; te = te->next) {
 			int ret;
-			if ((ret = outliner_lib_delete_invoke_do(C, reports, te, mval))) {
+			if ((ret = outliner_lib_relocate_invoke_do(C, reports, te, mval, reload))) {
 				return ret;
 			}
 		}
@@ -357,7 +600,7 @@ static int outliner_lib_delete_invoke_do(bContext *C, ReportList *reports, TreeE
 	return 0;
 }
 
-static int outliner_lib_delete_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+static int outliner_lib_relocate_invoke(bContext *C, wmOperator *op, const wmEvent *event)
 {
 	ARegion *ar = CTX_wm_region(C);
 	SpaceOops *soops = CTX_wm_space_outliner(C);
@@ -371,7 +614,7 @@ static int outliner_lib_delete_invoke(bContext *C, wmOperator *op, const wmEvent
 	for (te = soops->tree.first; te; te = te->next) {
 		int ret;
 
-		if ((ret = outliner_lib_delete_invoke_do(C, op->reports, te, fmval))) {
+		if ((ret = outliner_lib_relocate_invoke_do(C, op->reports, te, fmval, false))) {
 			return ret;
 		}
 	}
@@ -379,16 +622,69 @@ static int outliner_lib_delete_invoke(bContext *C, wmOperator *op, const wmEvent
 	return OPERATOR_CANCELLED;
 }
 
-void OUTLINER_OT_lib_delete(wmOperatorType *ot)
+void OUTLINER_OT_lib_relocate(wmOperatorType *ot)
 {
-	ot->name = "Delete Library";
-	ot->idname = "OUTLINER_OT_lib_delete";
-	ot->description = "Delete the library under cursor (needs a save/reload)";
+	ot->name = "Relocate Library";
+	ot->idname = "OUTLINER_OT_lib_relocate";
+	ot->description = "Relocate the library under cursor";
 
-	ot->invoke = outliner_lib_delete_invoke;
+	ot->invoke = outliner_lib_relocate_invoke;
 	ot->poll = ED_operator_outliner_active;
 }
 
+/* XXX This does not work with several items
+ *     (it is only called once in the end, due to the 'deffered' filebrowser invocation through event system...). */
+void lib_relocate_cb(
+        bContext *C, Scene *UNUSED(scene), TreeElement *te,
+        TreeStoreElem *UNUSED(tsep), TreeStoreElem *tselem, void *UNUSED(user_data))
+{
+	wmOperatorType *ot = WM_operatortype_find("WM_OT_lib_relocate", false);
+
+	lib_relocate(C, te, tselem, ot, false);
+}
+
+
+static int outliner_lib_reload_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+	ARegion *ar = CTX_wm_region(C);
+	SpaceOops *soops = CTX_wm_space_outliner(C);
+	TreeElement *te;
+	float fmval[2];
+
+	BLI_assert(ar && soops);
+
+	UI_view2d_region_to_view(&ar->v2d, event->mval[0], event->mval[1], &fmval[0], &fmval[1]);
+
+	for (te = soops->tree.first; te; te = te->next) {
+		int ret;
+
+		if ((ret = outliner_lib_relocate_invoke_do(C, op->reports, te, fmval, true))) {
+			return ret;
+		}
+	}
+
+	return OPERATOR_CANCELLED;
+}
+
+void OUTLINER_OT_lib_reload(wmOperatorType *ot)
+{
+	ot->name = "Reload Library";
+	ot->idname = "OUTLINER_OT_lib_reload";
+	ot->description = "Reload the library under cursor";
+
+	ot->invoke = outliner_lib_reload_invoke;
+	ot->poll = ED_operator_outliner_active;
+}
+
+void lib_reload_cb(
+        bContext *C, Scene *UNUSED(scene), TreeElement *te,
+        TreeStoreElem *UNUSED(tsep), TreeStoreElem *tselem, void *UNUSED(user_data))
+{
+	wmOperatorType *ot = WM_operatortype_find("WM_OT_lib_reload", false);
+
+	lib_relocate(C, te, tselem, ot, true);
+}
+
 /* ************************************************************** */
 /* Setting Toggling Operators */
 
diff --git a/source/blender/editors/space_outliner/outliner_intern.h b/source/blender/editors/space_outliner/outliner_intern.h
index 2e46ffa6437..d68815c5e57 100644
--- a/source/blender/editors/space_outliner/outliner_intern.h
+++ b/source/blender/editors/space_outliner/outliner_intern.h
@@ -179,8 +179,17 @@ void group_toggle_selectability_cb(struct bContext *C, struct Scene *scene, Tree
 void group_toggle_renderability_cb(struct bContext *C, struct Scene *scene, TreeElement *te, struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
 
 void item_rename_cb(struct bContext *C, struct Scene *scene, TreeElement *te, struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
+void lib_relocate_cb(
+        struct bContext *C, struct Scene *scene, struct TreeElement *te,
+        struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
+void lib_reload_cb(
+        struct bContext *C, struct Scene *scene, struct TreeElement *te,
+        struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
 
-void lib_delete_cb(
+void id_delete_cb(
+        struct bContext *C, struct Scene *scene, struct TreeElement *te,
+        struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
+void id_remap_cb(
         struct bContext *C, struct Scene *scene, struct TreeElement *te,
         struct TreeStoreElem *tsep, struct TreeStoreElem *tselem, void *user_data);
 
@@ -190,8 +199,10 @@ TreeElement *outliner_dropzone_find(const struct SpaceOops *soops, const float f
 void OUTLINER_OT_item_activate(struct wmOperatorType *ot);
 void OUTLINER_OT_item_openclose(struct wmOperatorType *ot);
 void OUTLINER_OT_item_rename(struct wmOperatorType *ot);
+void OUTLINER_OT_lib_relocate(struct wmOperatorType *ot);
+void OUTLINER_OT_lib_reload(struct wmOperatorType *ot);
 
-void OUTLINER_OT_lib_delete(struct wmOperatorType *ot);
+void OUTLINER_OT_id_delete(struct wmOperatorType *ot);
 
 void OUTLINER_OT_show_one_level(struct wmOperatorType *ot);
 void OUTLINER_OT_show_active(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_outliner/outliner_ops.c b/source/blender/editors/space_outliner/outliner_ops.c
index 720cfe12567..776717c8443 100644
--- a/source/blender/editors/space_outliner/outliner_ops.c
+++ b/source/blender/editors/space_outliner/outliner_ops.c
@@ -47,13 +47,15 @@ void outliner_operatortypes(void)
 	WM_operatortype_append(OUTLINER_OT_select_border);
 	WM_operatortype_append(OUTLINER_OT_item_openclose);
 	WM_operatortype_append(OUTLINER_OT_item_rename);
-	WM_operatortype_append(OUTLINER_OT_lib_delete);
 	WM_operatortype_append(OUTLINER_OT_operation);
 	WM_operatortype_append(OUTLINER_OT_scene_operation);
 	WM_operatortype_append(OUTLINER_OT_object_operation);
 	WM_operatortype_append(OUTLINER_OT_group_operation);
 	WM_operatortype_append(OUTLINER_OT_lib_operation);
+	WM_operatortype_append(OUTLINER_OT_lib_relocate);
 	WM_operatortype_append(OUTLINER_OT_id_operation);
+	WM_operatortype_append(OUTLINER_OT_id_delete);
+	WM_operatortype_append(OUTLINER_OT_id_remap);
 	WM_operatortype_append(OUTLINER_OT_data_operation);
 	WM_operatortype_append(OUTLINER_OT_animdata_operation);
 	WM_operatortype_append(OUTLINER_OT_action_set);
diff --git a/source/blender/editors/space_outliner/outliner_tools.c b/source/blender/editors/space_outliner/outliner_tools.c
index 2a210e382a2..265df4a8def 100644
--- a/source/blender/editors/space_outliner/outliner_tools.c
+++ b/source/blender/editors/space_outliner/outliner_tools.c
@@ -850,6 +850,7 @@ enum {
 	OL_OP_SELECT_HIERARCHY,
 	OL_OP_DELETE,
 	OL_OP_DELETE_HIERARCHY,
+	OL_OP_REMAP,
 	OL_OP_LOCALIZED,  /* disabled, see below */
 	OL_OP_TOGVIS,
 	OL_OP_TOGSEL,
@@ -863,6 +864,8 @@ static EnumPropertyItem prop_object_op_types[] = {
 	{OL_OP_SELECT_HIERARCHY, "SELECT_HIERARCHY", 0, "Select Hierarchy", ""},
 	{OL_OP_DELETE, "DELETE", 0, "Delete", ""},
 	{OL_OP_DELETE_HIERARCHY, "DELETE_HIERARCHY", 0, "Delete Hierarchy", ""},
+    {OL_OP_REMAP, "REMAP",   0, "Remap Users",
+     "Make all users of selected datablocks to use instead a new chosen one"},
 	{OL_OP_TOGVIS, "TOGVIS", 0, "Toggle Visible", ""},
 	{OL_OP_TOGSEL, "TOGSEL", 0, "Toggle Selectable", ""},
 	{OL_OP_TOGREN, "TOGREN", 0, "Toggle Renderable", ""},
@@ -932,6 +935,10 @@ static int outliner_object_operation_exec(bContext *C, wmOperator *op)
 		str = "Delete Object Hierarchy";
 		WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, scene);
 	}
+	else if (event == OL_OP_REMAP) {
+		outliner_do_libdata_operation(C, scene, soops, &soops->tree, id_remap_cb, NULL);
+		str = "Remap ID";
+	}
 	else if (event == OL_OP_LOCALIZED) {    /* disabled, see above enum (ton) */
 		outliner_do_object_operation(C, scene, soops, &soops->tree, id_local_cb);
 		str = "Localized Objects";
@@ -989,6 +996,8 @@ typedef enum eOutliner_PropGroupOps {
 	OL_GROUPOP_UNLINK = 1,
 	OL_GROUPOP_LOCAL,
 	OL_GROUPOP_LINK,
+	OL_GROUPOP_DELETE,
+	OL_GROUPOP_REMAP,
 	OL_GROUPOP_INSTANCE,
 	OL_GROUPOP_TOGVIS,
 	OL_GROUPOP_TOGSEL,
@@ -1000,6 +1009,9 @@ static EnumPropertyItem prop_group_op_types[] = {
 	{OL_GROUPOP_UNLINK, "UNLINK",     0, "Unlink Group", ""},
 	{OL_GROUPOP_LOCAL, "LOCAL",       0, "Make Local Group", ""},
 	{OL_GROUPOP_LINK, "LINK",         0, "Link Group Objects to Scene", ""},
+    {OL_GROUPOP_DELETE, "DELETE",     0, "Delete Group", "WARNING: no undo"},
+    {OL_GROUPOP_REMAP, "REMAP",       0, "Remap Users",
+     "Make all users of selected datablocks to use instead current (clicked) one"},
 	{OL_GROUPOP_INSTANCE, "INSTANCE", 0, "Instance Groups in Scene", ""},
 	{OL_GROUPOP_TOGVIS, "TOGVIS",     0, "Toggle Visible Group", ""},
 	{OL_GROUPOP_TOGSEL, "TOGSEL",     0, "Toggle Selectable", ""},
@@ -1032,6 +1044,14 @@ static int outliner_group_operation_exec(bContext *C, wmOperator *op)
 			break;
 		case OL_GROUPOP_INSTANCE:
 			outliner_do_libdata_operation(C, scene, soops, &soops->tree, group_instance_cb, NULL);
+			/* works without this except if you try render right after, see: 22027 */
+			DAG_relations_tag_update(CTX_data_main(C));
+			break;
+		case OL_GROUPOP_DELETE:
+			WM_operator_name_call(C, "OUTLINER_OT_id_delete", WM_OP_INVOKE_REGION_WIN, NULL);
+			break;
+		case OL_GROUPOP_REMAP:
+			outliner_do_libdata_operation(C, scene, soops, &soops->tree, id_remap_cb, NULL);
 			break;
 		case OL_GROUPOP_TOGVIS:
 			outliner_do_libdata_operation(C, scene, soops, &soops->tree, group_toggle_visibility_cb, NULL);
@@ -1049,11 +1069,6 @@ static int outliner_group_operation_exec(bContext *C, wmOperator *op)
 			BLI_assert(0);
 	}
 
-	if (event == 3) { /* instance */
-		/* works without this except if you try render right after, see: 22027 */
-		DAG_relations_tag_update(CTX_data_main(C));
-	}
-
 	ED_undo_push(C, prop_group_op_types[event - 1].name);
 	WM_event_add_notifier(C, NC_GROUP, NULL);
 
@@ -1086,6 +1101,8 @@ typedef enum eOutlinerIdOpTypes {
 	OUTLINER_IDOP_UNLINK,
 	OUTLINER_IDOP_LOCAL,
 	OUTLINER_IDOP_SINGLE,
+	OUTLINER_IDOP_DELETE,
+	OUTLINER_IDOP_REMAP,
 	
 	OUTLINER_IDOP_FAKE_ADD,
 	OUTLINER_IDOP_FAKE_CLEAR,
@@ -1099,6 +1116,9 @@ static EnumPropertyItem prop_id_op_types[] = {
 	{OUTLINER_IDOP_UNLINK, "UNLINK", 0, "Unlink", ""},
 	{OUTLINER_IDOP_LOCAL, "LOCAL", 0, "Make Local", ""},
 	{OUTLINER_IDOP_SINGLE, "SINGLE", 0, "Make Single User", ""},
+    {OUTLINER_IDOP_DELETE, "DELETE", 0, "Delete", "WARNING: no undo"},
+    {OUTLINER_IDOP_REMAP, "REMAP", 0, "Remap Users",
+     "Make all users of selected datablocks to use instead current (clicked) one"},
 	{OUTLINER_IDOP_FAKE_ADD, "ADD_FAKE", 0, "Add Fake User",
 	 "Ensure datablock gets saved even if it isn't in use (e.g. for motion and material libraries)"},
 	{OUTLINER_IDOP_FAKE_CLEAR, "CLEAR_FAKE", 0, "Clear Fake User", ""},
@@ -1188,6 +1208,20 @@ static int outliner_id_operation_exec(bContext *C, wmOperator *op)
 			}
 			break;
 		}
+		case OUTLINER_IDOP_DELETE:
+		{
+			if (idlevel > 0) {
+				outliner_do_libdata_operation(C, scene, soops, &soops->tree, id_delete_cb, NULL);
+			}
+			break;
+		}
+		case OUTLINER_IDOP_REMAP:
+		{
+			if (idlevel > 0) {
+				outliner_do_libdata_operation(C, scene, soops, &soops->tree, id_remap_cb, NULL);
+			}
+			break;
+		}
 		case OUTLINER_IDOP_FAKE_ADD:
 		{
 			/* set fake user */
@@ -1259,13 +1293,16 @@ typedef enum eOutlinerLibOpTypes {
 
 	OL_LIB_RENAME,
 	OL_LIB_DELETE,
+	OL_LIB_RELOCATE,
+	OL_LIB_RELOAD,
 } eOutlinerLibOpTypes;
 
 static EnumPropertyItem outliner_lib_op_type_items[] = {
 	{OL_LIB_RENAME, "RENAME", 0, "Rename", ""},
-	{OL_LIB_DELETE, "DELETE", 0, "Delete", "Delete this library and all its item from Blender (needs a save/reload)"},
+    {OL_LIB_DELETE, "DELETE", 0, "Delete", "Delete this library and all its item from Blender - WARNING: no undo"},
+    {OL_LIB_RELOCATE, "RELOCATE", 0, "Relocate", "Select a new path for this library, and reload all its data"},
+    {OL_LIB_RELOAD, "RELOAD", 0, "Reload", "Reload all data from this library"},
 	{0, NULL, 0, NULL, NULL}
-
 };
 
 static int outliner_lib_operation_exec(bContext *C, wmOperator *op)
@@ -1295,13 +1332,19 @@ static int outliner_lib_operation_exec(bContext *C, wmOperator *op)
 		}
 		case OL_LIB_DELETE:
 		{
-			/* delete */
-			outliner_do_libdata_operation(C, scene, soops, &soops->tree, lib_delete_cb, NULL);
-
-			WM_event_add_notifier(C, NC_ID | NA_EDITED, NULL);
-			/* Note: no undo possible here really, not 100% sure why...
-			 * Probably because of library optimizations in undo/redo process? */
-			/* ED_undo_push(C, "Rename"); */
+			outliner_do_libdata_operation(C, scene, soops, &soops->tree, id_delete_cb, NULL);
+			break;
+		}
+		case OL_LIB_RELOCATE:
+		{
+			/* rename */
+			outliner_do_libdata_operation(C, scene, soops, &soops->tree, lib_relocate_cb, NULL);
+			break;
+		}
+		case OL_LIB_RELOAD:
+		{
+			/* rename */
+			outliner_do_libdata_operation(C, scene, soops, &soops->tree, lib_reload_cb, NULL);
 			break;
 		}
 		default: