Commit: 5a431be629940e0ecffba047e80e0946a01f3aa4
Author: Ish Bosamiya
Date:   Thu May 24 19:22:28 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB5a431be629940e0ecffba047e80e0946a01f3aa4

Multi-Object-Editing: MESH_OT_shortest_path_select

Note from revisor: Edit the error message to match the original one.

Maniphest Tasks: T54643
Differential Revision: https://developer.blender.org/D3351

===================================================================

M       source/blender/editors/mesh/editmesh_path.c

===================================================================

diff --git a/source/blender/editors/mesh/editmesh_path.c 
b/source/blender/editors/mesh/editmesh_path.c
index 4081e3b0302..64d890a7314 100644
--- a/source/blender/editors/mesh/editmesh_path.c
+++ b/source/blender/editors/mesh/editmesh_path.c
@@ -29,6 +29,8 @@
  *  \ingroup edmesh
  */
 
+#include "MEM_guardedalloc.h"
+
 #include "DNA_scene_types.h"
 #include "DNA_object_types.h"
 #include "DNA_mesh_types.h"
@@ -41,6 +43,7 @@
 #include "BLI_math.h"
 #include "BLI_linklist.h"
 
+#include "BKE_layer.h"
 #include "BKE_context.h"
 #include "BKE_editmesh.h"
 #include "BKE_report.h"
@@ -726,67 +729,87 @@ void MESH_OT_shortest_path_pick(wmOperatorType *ot)
 static int edbm_shortest_path_select_exec(bContext *C, wmOperator *op)
 {
        Scene *scene = CTX_data_scene(C);
-       Object *obedit = CTX_data_edit_object(C);
-       BMEditMesh *em = BKE_editmesh_from_object(obedit);
-       BMesh *bm = em->bm;
-       BMIter iter;
-       BMEditSelection *ese_src, *ese_dst;
-       BMElem *ele_src = NULL, *ele_dst = NULL, *ele;
+       bool found_valid_elements = false;
+
+       ViewLayer *view_layer = CTX_data_view_layer(C);
+       uint objects_len = 0;
+       Object **objects = 
BKE_view_layer_array_from_objects_in_edit_mode_unique_data(view_layer, 
&objects_len);
+       for (uint ob_index = 0; ob_index < objects_len; ob_index++) {
+               Object *obedit = objects[ob_index];
+               BMEditMesh *em = BKE_editmesh_from_object(obedit);
+               BMesh *bm = em->bm;
+               BMIter iter;
+               BMEditSelection *ese_src, *ese_dst;
+               BMElem *ele_src = NULL, *ele_dst = NULL, *ele;
+
+               if ((em->bm->totvertsel == 0) &&
+                   (em->bm->totedgesel == 0) &&
+                   (em->bm->totfacesel == 0))
+               {
+                       continue;
+               }
 
-       /* first try to find vertices in edit selection */
-       ese_src = bm->selected.last;
-       if (ese_src && (ese_dst = ese_src->prev) && (ese_src->htype  == 
ese_dst->htype)) {
-               ele_src = ese_src->ele;
-               ele_dst = ese_dst->ele;
-       }
-       else {
-               /* if selection history isn't available, find two selected 
elements */
-               ele_src = ele_dst = NULL;
-               if ((em->selectmode & SCE_SELECT_VERTEX) && (bm->totvertsel >= 
2)) {
-                       BM_ITER_MESH (ele, &iter, bm, BM_VERTS_OF_MESH) {
-                               if (BM_elem_flag_test(ele, BM_ELEM_SELECT)) {
-                                       if      (ele_src == NULL) ele_src = ele;
-                                       else if (ele_dst == NULL) ele_dst = ele;
-                                       else                      break;
+               /* first try to find vertices in edit selection */
+               ese_src = bm->selected.last;
+               if (ese_src && (ese_dst = ese_src->prev) && (ese_src->htype  == 
ese_dst->htype)) {
+                       ele_src = ese_src->ele;
+                       ele_dst = ese_dst->ele;
+               }
+               else {
+                       /* if selection history isn't available, find two 
selected elements */
+                       ele_src = ele_dst = NULL;
+                       if ((em->selectmode & SCE_SELECT_VERTEX) && 
(bm->totvertsel >= 2)) {
+                               BM_ITER_MESH (ele, &iter, bm, BM_VERTS_OF_MESH) 
{
+                                       if (BM_elem_flag_test(ele, 
BM_ELEM_SELECT)) {
+                                               if      (ele_src == NULL) 
ele_src = ele;
+                                               else if (ele_dst == NULL) 
ele_dst = ele;
+                                               else                      break;
+                                       }
                                }
                        }
-               }
 
-               if ((ele_dst == NULL) && (em->selectmode & SCE_SELECT_EDGE) && 
(bm->totedgesel >= 2)) {
-                       ele_src = NULL;
-                       BM_ITER_MESH (ele, &iter, bm, BM_EDGES_OF_MESH) {
-                               if (BM_elem_flag_test(ele, BM_ELEM_SELECT)) {
-                                       if      (ele_src == NULL) ele_src = ele;
-                                       else if (ele_dst == NULL) ele_dst = ele;
-                                       else                      break;
+                       if ((ele_dst == NULL) && (em->selectmode & 
SCE_SELECT_EDGE) && (bm->totedgesel >= 2)) {
+                               ele_src = NULL;
+                               BM_ITER_MESH (ele, &iter, bm, BM_EDGES_OF_MESH) 
{
+                                       if (BM_elem_flag_test(ele, 
BM_ELEM_SELECT)) {
+                                               if      (ele_src == NULL) 
ele_src = ele;
+                                               else if (ele_dst == NULL) 
ele_dst = ele;
+                                               else                      break;
+                                       }
                                }
                        }
-               }
 
-               if ((ele_dst == NULL) && (em->selectmode & SCE_SELECT_FACE) && 
(bm->totfacesel >= 2)) {
-                       ele_src = NULL;
-                       BM_ITER_MESH (ele, &iter, bm, BM_FACES_OF_MESH) {
-                               if (BM_elem_flag_test(ele, BM_ELEM_SELECT)) {
-                                       if      (ele_src == NULL) ele_src = ele;
-                                       else if (ele_dst == NULL) ele_dst = ele;
-                                       else                      break;
+                       if ((ele_dst == NULL) && (em->selectmode & 
SCE_SELECT_FACE) && (bm->totfacesel >= 2)) {
+                               ele_src = NULL;
+                               BM_ITER_MESH (ele, &iter, bm, BM_FACES_OF_MESH) 
{
+                                       if (BM_elem_flag_test(ele, 
BM_ELEM_SELECT)) {
+                                               if      (ele_src == NULL) 
ele_src = ele;
+                                               else if (ele_dst == NULL) 
ele_dst = ele;
+                                               else                      break;
+                                       }
                                }
                        }
                }
-       }
 
-       if (ele_src && ele_dst) {
-               struct PathSelectParams op_params;
-               path_select_params_from_op(op, &op_params);
+               if (ele_src && ele_dst) {
+                       struct PathSelectParams op_params;
+                       path_select_params_from_op(op, &op_params);
 
-               edbm_shortest_path_pick_ex(scene, obedit, &op_params, ele_src, 
ele_dst);
+                       edbm_shortest_path_pick_ex(scene, obedit, &op_params, 
ele_src, ele_dst);
 
-               return OPERATOR_FINISHED;
+                       found_valid_elements = true;
+               }
        }
-       else {
-               BKE_report(op->reports, RPT_WARNING, "Path selection requires 
two matching elements to be selected");
+       MEM_freeN(objects);
+
+       if (!found_valid_elements) {
+               BKE_report(op->reports,
+                          RPT_WARNING,
+                          "Path selection requires two matching elements to be 
selected");
                return OPERATOR_CANCELLED;
        }
+
+       return OPERATOR_FINISHED;
 }
 
 void MESH_OT_shortest_path_select(wmOperatorType *ot)

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