[gimp] app: replace more gimp_(s|g)et_active_layer() to *_selected_layers().

[Jehan <jehanp src gnome org>]

commit 02fa3542540f6b4ed62028edb02bea304276c821
Author: Jehan <jehan girinstud io>
Date:   Sun Feb 21 17:11:34 2021 +0100

    app: replace more gimp_(s|g)et_active_layer() to *_selected_layers().

 app/actions/text-tool-actions.c            |  8 ++++----
 app/core/gimpfloatingselectionundo.c       |  6 +++++-
 app/core/gimplayer-floating-selection.c    | 20 +++++++++-----------
 app/display/gimpdisplayshell-tool-events.c |  4 +++-
 4 files changed, 21 insertions(+), 17 deletions(-)
---
diff --git a/app/actions/text-tool-actions.c b/app/actions/text-tool-actions.c
index 89f58a88e4..1c7e6798d8 100644
--- a/app/actions/text-tool-actions.c
+++ b/app/actions/text-tool-actions.c
@@ -161,7 +161,7 @@ text_tool_actions_update (GimpActionGroup *group,
   GimpTextTool     *text_tool  = GIMP_TEXT_TOOL (data);
   GimpDisplay      *display    = GIMP_TOOL (text_tool)->display;
   GimpImage        *image      = gimp_display_get_image (display);
-  GimpLayer        *layer;
+  GList            *layers;
   GimpVectors      *vectors;
   GimpDisplayShell *shell;
   GtkClipboard     *clipboard;
@@ -171,10 +171,10 @@ text_tool_actions_update (GimpActionGroup *group,
   GimpTextDirection direction;
   gint              i;
 
-  layer = gimp_image_get_active_layer (image);
+  layers = gimp_image_get_selected_layers (image);
 
-  if (layer)
-    text_layer = gimp_item_is_text_layer (GIMP_ITEM (layer));
+  if (g_list_length (layers) == 1)
+    text_layer = gimp_item_is_text_layer (GIMP_ITEM (layers->data));
 
   vectors = gimp_image_get_active_vectors (image);
 
diff --git a/app/core/gimpfloatingselectionundo.c b/app/core/gimpfloatingselectionundo.c
index 6ca28abea9..f6029411f7 100644
--- a/app/core/gimpfloatingselectionundo.c
+++ b/app/core/gimpfloatingselectionundo.c
@@ -101,12 +101,16 @@ gimp_floating_selection_undo_pop (GimpUndo            *undo,
     case GIMP_UNDO_FS_TO_LAYER:
       if (undo_mode == GIMP_UNDO_MODE_UNDO)
         {
+          GList *layers;
+
           /*  Update the preview for the floating selection  */
           gimp_viewable_invalidate_preview (GIMP_VIEWABLE (floating_layer));
 
           gimp_layer_set_floating_sel_drawable (floating_layer,
                                                 floating_sel_undo->drawable);
-          gimp_image_set_active_layer (undo->image, floating_layer);
+          layers = g_list_prepend (NULL, floating_layer);
+          gimp_image_set_selected_layers (undo->image, layers);
+          g_list_free (layers);
 
           gimp_drawable_attach_floating_sel (gimp_layer_get_floating_sel_drawable (floating_layer),
                                              floating_layer);
diff --git a/app/core/gimplayer-floating-selection.c b/app/core/gimplayer-floating-selection.c
index 3ccb0af18a..14b81aa0e6 100644
--- a/app/core/gimplayer-floating-selection.c
+++ b/app/core/gimplayer-floating-selection.c
@@ -217,6 +217,7 @@ floating_sel_activate_drawable (GimpLayer *layer)
 {
   GimpImage    *image;
   GimpDrawable *drawable;
+  GList        *selected_drawables;
 
   g_return_if_fail (GIMP_IS_LAYER (layer));
   g_return_if_fail (gimp_layer_is_floating_sel (layer));
@@ -230,24 +231,21 @@ floating_sel_activate_drawable (GimpLayer *layer)
     {
       GimpLayerMask *mask = GIMP_LAYER_MASK (drawable);
 
-      gimp_image_set_active_layer (image, gimp_layer_mask_get_layer (mask));
+      selected_drawables = g_list_prepend (NULL, gimp_layer_mask_get_layer (mask));
+      gimp_image_set_selected_layers (image, selected_drawables);
     }
   else if (GIMP_IS_CHANNEL (drawable))
     {
-      GList *channels = g_list_prepend (NULL, drawable);
-
-      gimp_image_set_selected_channels (image, channels);
-
-      g_list_free (channels);
+      selected_drawables = g_list_prepend (NULL, drawable);
+      gimp_image_set_selected_channels (image, selected_drawables);
     }
   else
     {
-      GList *layers = g_list_prepend (NULL, drawable);
-
-      gimp_image_set_selected_layers (image, layers);
-
-      g_list_free (layers);
+      selected_drawables = g_list_prepend (NULL, drawable);
+      gimp_image_set_selected_layers (image, selected_drawables);
     }
+
+  g_list_free (selected_drawables);
 }
 
 const GimpBoundSeg *
diff --git a/app/display/gimpdisplayshell-tool-events.c b/app/display/gimpdisplayshell-tool-events.c
index 6fd2a75195..917b16845a 100644
--- a/app/display/gimpdisplayshell-tool-events.c
+++ b/app/display/gimpdisplayshell-tool-events.c
@@ -1560,7 +1560,9 @@ gimp_display_shell_start_scrolling (GimpDisplayShell *shell,
             {
               GimpStatusbar *statusbar;
 
-              gimp_image_set_active_layer (image, layer);
+              layers = g_list_prepend (NULL, layer);
+              gimp_image_set_selected_layers (image, layers);
+              g_list_free (layers);
 
               statusbar = gimp_display_shell_get_statusbar (shell);
               gimp_statusbar_push_temp (statusbar, GIMP_MESSAGE_INFO,