From 687fbf458312e73c63c4e2a7c3cb49525cd59689 Mon Sep 17 00:00:00 2001
From: Michael Natterer <mitch@gimp.org>
Date: Tue, 12 Jun 2012 21:39:40 +0200
Subject: [PATCH] Bug 677823 - Shift + mouse click to link all layers does not
 work

This got lost during layer group porting, reimplement it, but restrict
"all layers" to the clicked layer's branch in the tree.
(cherry picked from commit 67b5a509b6c830e59f0f9edaae78899afc0ec1c8)
---
 app/core/gimpitem-exclusive.c  | 91 +++++++++++++++++++++++++++++++++-
 app/core/gimpitem-exclusive.h  |  2 +
 app/widgets/gimpitemtreeview.c |  2 +-
 3 files changed, 92 insertions(+), 3 deletions(-)

diff --git a/app/core/gimpitem-exclusive.c b/app/core/gimpitem-exclusive.c
index aa504b05bd..fa2b56c536 100644
--- a/app/core/gimpitem-exclusive.c
+++ b/app/core/gimpitem-exclusive.c
@@ -70,7 +70,7 @@ gimp_item_toggle_exclusive_visible (GimpItem    *item,
       undo = gimp_image_undo_can_compress (image, GIMP_TYPE_UNDO_STACK,
                                            GIMP_UNDO_GROUP_ITEM_VISIBILITY);
 
-      if (undo && (g_object_get_data (G_OBJECT (undo), "exclusive-item") ==
+      if (undo && (g_object_get_data (G_OBJECT (undo), "exclusive-visible-item") ==
                    (gpointer) item))
         push_undo = FALSE;
 
@@ -84,7 +84,7 @@ gimp_item_toggle_exclusive_visible (GimpItem    *item,
                                                    GIMP_UNDO_GROUP_ITEM_VISIBILITY);
 
               if (undo)
-                g_object_set_data (G_OBJECT (undo), "exclusive-item",
+                g_object_set_data (G_OBJECT (undo), "exclusive-visible-item",
                                    (gpointer) item);
             }
 
@@ -125,6 +125,93 @@ gimp_item_toggle_exclusive_visible (GimpItem    *item,
   g_list_free (ancestry);
 }
 
+void
+gimp_item_toggle_exclusive_linked (GimpItem    *item,
+                                   GimpContext *context)
+{
+  GList *on  = NULL;
+  GList *off = NULL;
+  GList *list;
+
+  g_return_if_fail (GIMP_IS_ITEM (item));
+  g_return_if_fail (gimp_item_is_attached (item));
+  g_return_if_fail (GIMP_IS_CONTEXT (context));
+
+  for (list = gimp_item_get_container_iter (item);
+       list;
+       list = g_list_next (list))
+    {
+      GimpItem *other = list->data;
+
+      if (other != item)
+        {
+          if (gimp_item_get_linked (other))
+            on = g_list_prepend (on, other);
+          else
+            off = g_list_prepend (off, other);
+        }
+    }
+
+  if (on || off || ! gimp_item_get_linked (item))
+    {
+      GimpImage *image = gimp_item_get_image (item);
+      GimpUndo  *undo;
+      gboolean   push_undo = TRUE;
+
+      undo = gimp_image_undo_can_compress (image, GIMP_TYPE_UNDO_STACK,
+                                           GIMP_UNDO_GROUP_ITEM_LINKED);
+
+      if (undo && (g_object_get_data (G_OBJECT (undo), "exclusive-linked-item") ==
+                   (gpointer) item))
+        push_undo = FALSE;
+
+      if (push_undo)
+        {
+          if (gimp_image_undo_group_start (image,
+                                           GIMP_UNDO_GROUP_ITEM_LINKED,
+                                           _("Set Item Exclusive Linked")))
+            {
+              undo = gimp_image_undo_can_compress (image, GIMP_TYPE_UNDO_STACK,
+                                                   GIMP_UNDO_GROUP_ITEM_LINKED);
+
+              if (undo)
+                g_object_set_data (G_OBJECT (undo), "exclusive-linked-item",
+                                   (gpointer) item);
+            }
+
+          gimp_image_undo_push_item_linked (image, NULL, item);
+
+          for (list = on; list; list = g_list_next (list))
+            gimp_image_undo_push_item_linked (image, NULL, list->data);
+
+          for (list = off; list; list = g_list_next (list))
+            gimp_image_undo_push_item_linked (image, NULL, list->data);
+
+          gimp_image_undo_group_end (image);
+        }
+      else
+        {
+          gimp_undo_refresh_preview (undo, context);
+        }
+
+      if (off || ! gimp_item_get_linked (item))
+        {
+          gimp_item_set_linked (item, TRUE, FALSE);
+
+          for (list = off; list; list = g_list_next (list))
+            gimp_item_set_linked (list->data, TRUE, FALSE);
+        }
+      else
+        {
+          for (list = on; list; list = g_list_next (list))
+            gimp_item_set_linked (list->data, FALSE, FALSE);
+        }
+
+      g_list_free (on);
+      g_list_free (off);
+    }
+}
+
 
 /*  private functions  */
 
diff --git a/app/core/gimpitem-exclusive.h b/app/core/gimpitem-exclusive.h
index 932c89e525..da160f88c1 100644
--- a/app/core/gimpitem-exclusive.h
+++ b/app/core/gimpitem-exclusive.h
@@ -24,6 +24,8 @@
 
 void   gimp_item_toggle_exclusive_visible (GimpItem    *item,
                                            GimpContext *context);
+void   gimp_item_toggle_exclusive_linked  (GimpItem    *item,
+                                           GimpContext *context);
 
 
 #endif /* __GIMP_ITEM_EXCLUSIVE_H__ */
diff --git a/app/widgets/gimpitemtreeview.c b/app/widgets/gimpitemtreeview.c
index 7400e0ed38..4caa6c82c9 100644
--- a/app/widgets/gimpitemtreeview.c
+++ b/app/widgets/gimpitemtreeview.c
@@ -1491,7 +1491,7 @@ gimp_item_tree_view_toggle_clicked (GtkCellRendererToggle *toggle,
 
     case GIMP_UNDO_ITEM_LINKED:
       setter     = gimp_item_set_linked;
-      exclusive  = NULL;
+      exclusive  = gimp_item_toggle_exclusive_linked;
       break;
 
     default: