Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 966 insertions, 0 deletions

diff --git a/app/tools/tool_manager.c b/app/tools/tool_manager.c
new file mode 100644
index 0000000..3b8bc88
--- /dev/null
+++ b/app/tools/tool_manager.c
@@ -0,0 +1,966 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpconfig/gimpconfig.h"
+
+#include "tools-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpcontext.h"
+#include "core/gimplist.h"
+#include "core/gimpimage.h"
+#include "core/gimptoolgroup.h"
+#include "core/gimptoolinfo.h"
+#include "core/gimptooloptions.h"
+#include "core/gimptoolpreset.h"
+
+#include "display/gimpdisplay.h"
+
+#include "widgets/gimpcairo-wilber.h"
+
+#include "gimptool.h"
+#include "gimptoolcontrol.h"
+#include "tool_manager.h"
+
+
+typedef struct _GimpToolManager GimpToolManager;
+
+struct _GimpToolManager
+{
+  Gimp          *gimp;
+
+  GimpTool      *active_tool;
+  GSList        *tool_stack;
+
+  GimpToolGroup *active_tool_group;
+
+  GQuark         image_clean_handler_id;
+  GQuark         image_dirty_handler_id;
+  GQuark         image_saving_handler_id;
+};
+
+
+/*  local function prototypes  */
+
+static void              tool_manager_set                       (Gimp            *gimp,
+                                                                 GimpToolManager *tool_manager);
+static GimpToolManager * tool_manager_get                       (Gimp            *gimp);
+
+static void              tool_manager_select_tool               (GimpToolManager *tool_manager,
+                                                                 GimpTool        *tool);
+
+static void              tool_manager_set_active_tool_group     (GimpToolManager *tool_manager,
+                                                                 GimpToolGroup   *tool_group);
+
+static void              tool_manager_tool_changed              (GimpContext     *user_context,
+                                                                 GimpToolInfo    *tool_info,
+                                                                 GimpToolManager *tool_manager);
+static void              tool_manager_preset_changed            (GimpContext     *user_context,
+                                                                 GimpToolPreset  *preset,
+                                                                 GimpToolManager *tool_manager);
+static void              tool_manager_image_clean_dirty         (GimpImage       *image,
+                                                                 GimpDirtyMask    dirty_mask,
+                                                                 GimpToolManager *tool_manager);
+static void              tool_manager_image_saving              (GimpImage       *image,
+                                                                 GimpToolManager *tool_manager);
+static void              tool_manager_tool_ancestry_changed     (GimpToolInfo    *tool_info,
+                                                                 GimpToolManager *tool_manager);
+static void              tool_manager_group_active_tool_changed (GimpToolGroup   *tool_group,
+                                                                 GimpToolManager *tool_manager);
+
+static void              tool_manager_cast_spell                (GimpToolInfo    *tool_info);
+
+
+/*  public functions  */
+
+void
+tool_manager_init (Gimp *gimp)
+{
+  GimpToolManager *tool_manager;
+  GimpContext     *user_context;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = g_slice_new0 (GimpToolManager);
+
+  tool_manager->gimp                    = gimp;
+  tool_manager->active_tool             = NULL;
+  tool_manager->tool_stack              = NULL;
+  tool_manager->active_tool_group       = NULL;
+  tool_manager->image_clean_handler_id  = 0;
+  tool_manager->image_dirty_handler_id  = 0;
+  tool_manager->image_saving_handler_id = 0;
+
+  tool_manager_set (gimp, tool_manager);
+
+  tool_manager->image_clean_handler_id =
+    gimp_container_add_handler (gimp->images, "clean",
+                                G_CALLBACK (tool_manager_image_clean_dirty),
+                                tool_manager);
+
+  tool_manager->image_dirty_handler_id =
+    gimp_container_add_handler (gimp->images, "dirty",
+                                G_CALLBACK (tool_manager_image_clean_dirty),
+                                tool_manager);
+
+  tool_manager->image_saving_handler_id =
+    gimp_container_add_handler (gimp->images, "saving",
+                                G_CALLBACK (tool_manager_image_saving),
+                                tool_manager);
+
+  user_context = gimp_get_user_context (gimp);
+
+  g_signal_connect (user_context, "tool-changed",
+                    G_CALLBACK (tool_manager_tool_changed),
+                    tool_manager);
+  g_signal_connect (user_context, "tool-preset-changed",
+                    G_CALLBACK (tool_manager_preset_changed),
+                    tool_manager);
+
+  tool_manager_tool_changed (user_context,
+                             gimp_context_get_tool (user_context),
+                             tool_manager);
+}
+
+void
+tool_manager_exit (Gimp *gimp)
+{
+  GimpToolManager *tool_manager;
+  GimpContext     *user_context;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+  tool_manager_set (gimp, NULL);
+
+  user_context = gimp_get_user_context (gimp);
+
+  g_signal_handlers_disconnect_by_func (user_context,
+                                        tool_manager_tool_changed,
+                                        tool_manager);
+  g_signal_handlers_disconnect_by_func (user_context,
+                                        tool_manager_preset_changed,
+                                        tool_manager);
+
+  gimp_container_remove_handler (gimp->images,
+                                 tool_manager->image_clean_handler_id);
+  gimp_container_remove_handler (gimp->images,
+                                 tool_manager->image_dirty_handler_id);
+  gimp_container_remove_handler (gimp->images,
+                                 tool_manager->image_saving_handler_id);
+
+  if (tool_manager->active_tool)
+    {
+      g_signal_handlers_disconnect_by_func (
+        tool_manager->active_tool->tool_info,
+        tool_manager_tool_ancestry_changed,
+        tool_manager);
+
+      g_clear_object (&tool_manager->active_tool);
+    }
+
+  tool_manager_set_active_tool_group (tool_manager, NULL);
+
+  g_slice_free (GimpToolManager, tool_manager);
+}
+
+GimpTool *
+tool_manager_get_active (Gimp *gimp)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
+
+  tool_manager = tool_manager_get (gimp);
+
+  return tool_manager->active_tool;
+}
+
+void
+tool_manager_push_tool (Gimp     *gimp,
+                        GimpTool *tool)
+{
+  GimpToolManager *tool_manager;
+  GimpDisplay     *focus_display = NULL;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+  g_return_if_fail (GIMP_IS_TOOL (tool));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      focus_display = tool_manager->active_tool->focus_display;
+
+      tool_manager->tool_stack = g_slist_prepend (tool_manager->tool_stack,
+                                                  tool_manager->active_tool);
+
+      g_object_ref (tool_manager->tool_stack->data);
+    }
+
+  tool_manager_select_tool (tool_manager, tool);
+
+  if (focus_display)
+    tool_manager_focus_display_active (gimp, focus_display);
+}
+
+void
+tool_manager_pop_tool (Gimp *gimp)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->tool_stack)
+    {
+      GimpTool *tool = tool_manager->tool_stack->data;
+
+      tool_manager->tool_stack = g_slist_remove (tool_manager->tool_stack,
+                                                 tool);
+
+      tool_manager_select_tool (tool_manager, tool);
+
+      g_object_unref (tool);
+    }
+}
+
+gboolean
+tool_manager_initialize_active (Gimp        *gimp,
+                                GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+  g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      GimpTool *tool = tool_manager->active_tool;
+
+      if (gimp_tool_initialize (tool, display))
+        {
+          GimpImage *image = gimp_display_get_image (display);
+
+          tool->drawable = gimp_image_get_active_drawable (image);
+
+          return TRUE;
+        }
+    }
+
+  return FALSE;
+}
+
+void
+tool_manager_control_active (Gimp           *gimp,
+                             GimpToolAction  action,
+                             GimpDisplay    *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      GimpTool *tool = tool_manager->active_tool;
+
+      if (display && gimp_tool_has_display (tool, display))
+        {
+          gimp_tool_control (tool, action, display);
+        }
+      else if (action == GIMP_TOOL_ACTION_HALT)
+        {
+          if (gimp_tool_control_is_active (tool->control))
+            gimp_tool_control_halt (tool->control);
+        }
+    }
+}
+
+void
+tool_manager_button_press_active (Gimp                *gimp,
+                                  const GimpCoords    *coords,
+                                  guint32              time,
+                                  GdkModifierType      state,
+                                  GimpButtonPressType  press_type,
+                                  GimpDisplay         *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      gimp_tool_button_press (tool_manager->active_tool,
+                              coords, time, state, press_type,
+                              display);
+    }
+}
+
+void
+tool_manager_button_release_active (Gimp             *gimp,
+                                    const GimpCoords *coords,
+                                    guint32           time,
+                                    GdkModifierType   state,
+                                    GimpDisplay      *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      gimp_tool_button_release (tool_manager->active_tool,
+                                coords, time, state,
+                                display);
+    }
+}
+
+void
+tool_manager_motion_active (Gimp             *gimp,
+                            const GimpCoords *coords,
+                            guint32           time,
+                            GdkModifierType   state,
+                            GimpDisplay      *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      gimp_tool_motion (tool_manager->active_tool,
+                        coords, time, state,
+                        display);
+    }
+}
+
+gboolean
+tool_manager_key_press_active (Gimp        *gimp,
+                               GdkEventKey *kevent,
+                               GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_key_press (tool_manager->active_tool,
+                                  kevent,
+                                  display);
+    }
+
+  return FALSE;
+}
+
+gboolean
+tool_manager_key_release_active (Gimp        *gimp,
+                                 GdkEventKey *kevent,
+                                 GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_key_release (tool_manager->active_tool,
+                                    kevent,
+                                    display);
+    }
+
+  return FALSE;
+}
+
+void
+tool_manager_focus_display_active (Gimp        *gimp,
+                                   GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool &&
+      ! gimp_tool_control_is_active (tool_manager->active_tool->control))
+    {
+      gimp_tool_set_focus_display (tool_manager->active_tool,
+                                   display);
+    }
+}
+
+void
+tool_manager_modifier_state_active (Gimp            *gimp,
+                                    GdkModifierType  state,
+                                    GimpDisplay     *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool &&
+      ! gimp_tool_control_is_active (tool_manager->active_tool->control))
+    {
+      gimp_tool_set_modifier_state (tool_manager->active_tool,
+                                    state,
+                                    display);
+    }
+}
+
+void
+tool_manager_active_modifier_state_active (Gimp            *gimp,
+                                           GdkModifierType  state,
+                                           GimpDisplay     *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      gimp_tool_set_active_modifier_state (tool_manager->active_tool,
+                                           state,
+                                           display);
+    }
+}
+
+void
+tool_manager_oper_update_active (Gimp             *gimp,
+                                 const GimpCoords *coords,
+                                 GdkModifierType   state,
+                                 gboolean          proximity,
+                                 GimpDisplay      *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool &&
+      ! gimp_tool_control_is_active (tool_manager->active_tool->control))
+    {
+      gimp_tool_oper_update (tool_manager->active_tool,
+                             coords, state, proximity,
+                             display);
+    }
+}
+
+void
+tool_manager_cursor_update_active (Gimp             *gimp,
+                                   const GimpCoords *coords,
+                                   GdkModifierType   state,
+                                   GimpDisplay      *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_if_fail (GIMP_IS_GIMP (gimp));
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool &&
+      ! gimp_tool_control_is_active (tool_manager->active_tool->control))
+    {
+      gimp_tool_cursor_update (tool_manager->active_tool,
+                               coords, state,
+                               display);
+    }
+}
+
+const gchar *
+tool_manager_can_undo_active (Gimp        *gimp,
+                              GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_can_undo (tool_manager->active_tool,
+                                 display);
+    }
+
+  return NULL;
+}
+
+const gchar *
+tool_manager_can_redo_active (Gimp        *gimp,
+                              GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_can_redo (tool_manager->active_tool,
+                                 display);
+    }
+
+  return NULL;
+}
+
+gboolean
+tool_manager_undo_active (Gimp        *gimp,
+                          GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_undo (tool_manager->active_tool,
+                             display);
+    }
+
+  return FALSE;
+}
+
+gboolean
+tool_manager_redo_active (Gimp        *gimp,
+                          GimpDisplay *display)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_redo (tool_manager->active_tool,
+                             display);
+    }
+
+  return FALSE;
+}
+
+GimpUIManager *
+tool_manager_get_popup_active (Gimp             *gimp,
+                               const GimpCoords *coords,
+                               GdkModifierType   state,
+                               GimpDisplay      *display,
+                               const gchar     **ui_path)
+{
+  GimpToolManager *tool_manager;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
+
+  tool_manager = tool_manager_get (gimp);
+
+  if (tool_manager->active_tool)
+    {
+      return gimp_tool_get_popup (tool_manager->active_tool,
+                                  coords, state,
+                                  display,
+                                  ui_path);
+    }
+
+  return NULL;
+}
+
+
+/*  private functions  */
+
+static GQuark tool_manager_quark = 0;
+
+static void
+tool_manager_set (Gimp            *gimp,
+                  GimpToolManager *tool_manager)
+{
+  if (! tool_manager_quark)
+    tool_manager_quark = g_quark_from_static_string ("gimp-tool-manager");
+
+  g_object_set_qdata (G_OBJECT (gimp), tool_manager_quark, tool_manager);
+}
+
+static GimpToolManager *
+tool_manager_get (Gimp *gimp)
+{
+  if (! tool_manager_quark)
+    tool_manager_quark = g_quark_from_static_string ("gimp-tool-manager");
+
+  return g_object_get_qdata (G_OBJECT (gimp), tool_manager_quark);
+}
+
+static void
+tool_manager_select_tool (GimpToolManager *tool_manager,
+                          GimpTool        *tool)
+{
+  Gimp *gimp = tool_manager->gimp;
+
+  /*  reset the previously selected tool, but only if it is not only
+   *  temporarily pushed to the tool stack
+   */
+  if (tool_manager->active_tool)
+    {
+      if (! tool_manager->tool_stack ||
+          tool_manager->active_tool != tool_manager->tool_stack->data)
+        {
+          GimpTool    *active_tool = tool_manager->active_tool;
+          GimpDisplay *display;
+
+          /*  NULL image returns any display (if there is any)  */
+          display = gimp_tool_has_image (active_tool, NULL);
+
+          tool_manager_control_active (gimp, GIMP_TOOL_ACTION_HALT, display);
+          tool_manager_focus_display_active (gimp, NULL);
+        }
+    }
+
+  g_set_object (&tool_manager->active_tool, tool);
+}
+
+static void
+tool_manager_set_active_tool_group (GimpToolManager *tool_manager,
+                                    GimpToolGroup   *tool_group)
+{
+  if (tool_group != tool_manager->active_tool_group)
+    {
+      if (tool_manager->active_tool_group)
+        {
+          g_signal_handlers_disconnect_by_func (
+            tool_manager->active_tool_group,
+            tool_manager_group_active_tool_changed,
+            tool_manager);
+        }
+
+      g_set_weak_pointer (&tool_manager->active_tool_group, tool_group);
+
+      if (tool_manager->active_tool_group)
+        {
+          g_signal_connect (
+            tool_manager->active_tool_group, "active-tool-changed",
+            G_CALLBACK (tool_manager_group_active_tool_changed),
+            tool_manager);
+        }
+    }
+}
+
+static void
+tool_manager_tool_changed (GimpContext     *user_context,
+                           GimpToolInfo    *tool_info,
+                           GimpToolManager *tool_manager)
+{
+  GimpTool *new_tool = NULL;
+
+  if (! tool_info)
+    return;
+
+  if (! g_type_is_a (tool_info->tool_type, GIMP_TYPE_TOOL))
+    {
+      g_warning ("%s: tool_info->tool_type is no GimpTool subclass",
+                 G_STRFUNC);
+      return;
+    }
+
+  /* FIXME: gimp_busy HACK */
+  if (user_context->gimp->busy)
+    {
+      /*  there may be contexts waiting for the user_context's "tool-changed"
+       *  signal, so stop emitting it.
+       */
+      g_signal_stop_emission_by_name (user_context, "tool-changed");
+
+      if (G_TYPE_FROM_INSTANCE (tool_manager->active_tool) !=
+          tool_info->tool_type)
+        {
+          g_signal_handlers_block_by_func (user_context,
+                                           tool_manager_tool_changed,
+                                           tool_manager);
+
+          /*  explicitly set the current tool  */
+          gimp_context_set_tool (user_context,
+                                 tool_manager->active_tool->tool_info);
+
+          g_signal_handlers_unblock_by_func (user_context,
+                                             tool_manager_tool_changed,
+                                             tool_manager);
+        }
+
+      return;
+    }
+
+  g_return_if_fail (tool_manager->tool_stack == NULL);
+
+  if (tool_manager->active_tool)
+    {
+      GimpTool    *active_tool = tool_manager->active_tool;
+      GimpDisplay *display;
+
+      /*  NULL image returns any display (if there is any)  */
+      display = gimp_tool_has_image (active_tool, NULL);
+
+      /*  commit the old tool's operation before creating the new tool
+       *  because creating a tool might mess with the old tool's
+       *  options (old and new tool might be the same)
+       */
+      if (display)
+        tool_manager_control_active (user_context->gimp, GIMP_TOOL_ACTION_COMMIT,
+                                     display);
+
+      g_signal_handlers_disconnect_by_func (active_tool->tool_info,
+                                            tool_manager_tool_ancestry_changed,
+                                            tool_manager);
+    }
+
+  g_signal_connect (tool_info, "ancestry-changed",
+                    G_CALLBACK (tool_manager_tool_ancestry_changed),
+                    tool_manager);
+
+  tool_manager_tool_ancestry_changed (tool_info, tool_manager);
+
+  new_tool = g_object_new (tool_info->tool_type,
+                           "tool-info", tool_info,
+                           NULL);
+
+  tool_manager_select_tool (tool_manager, new_tool);
+
+  g_object_unref (new_tool);
+
+  /* ??? */
+  tool_manager_cast_spell (tool_info);
+}
+
+static void
+tool_manager_copy_tool_options (GObject *src,
+                                GObject *dest)
+{
+  GList *diff;
+
+  diff = gimp_config_diff (src, dest, G_PARAM_READWRITE);
+
+  if (diff)
+    {
+      GList *list;
+
+      g_object_freeze_notify (dest);
+
+      for (list = diff; list; list = list->next)
+        {
+          GParamSpec *prop_spec = list->data;
+
+          if (g_type_is_a (prop_spec->owner_type, GIMP_TYPE_TOOL_OPTIONS) &&
+              ! (prop_spec->flags & G_PARAM_CONSTRUCT_ONLY))
+            {
+              GValue value = G_VALUE_INIT;
+
+              g_value_init (&value, prop_spec->value_type);
+
+              g_object_get_property (src,  prop_spec->name, &value);
+              g_object_set_property (dest, prop_spec->name, &value);
+
+              g_value_unset (&value);
+            }
+        }
+
+      g_object_thaw_notify (dest);
+
+      g_list_free (diff);
+    }
+}
+
+static void
+tool_manager_preset_changed (GimpContext     *user_context,
+                             GimpToolPreset  *preset,
+                             GimpToolManager *tool_manager)
+{
+  GimpToolInfo *preset_tool;
+
+  if (! preset || user_context->gimp->busy)
+    return;
+
+  preset_tool = gimp_context_get_tool (GIMP_CONTEXT (preset->tool_options));
+
+  /* first, select the preset's tool, even if it's already the active
+   * tool
+   */
+  gimp_context_set_tool (user_context, preset_tool);
+
+  /* then, copy the context properties the preset remembers, possibly
+   * changing some tool options due to the "link brush stuff to brush
+   * defaults" settings in gimptooloptions.c
+   */
+  gimp_context_copy_properties (GIMP_CONTEXT (preset->tool_options),
+                                user_context,
+                                gimp_tool_preset_get_prop_mask (preset));
+
+  /* finally, copy all tool options properties, overwriting any
+   * changes resulting from setting the context properties above, we
+   * really want exactly what is in the preset and nothing else
+   */
+  tool_manager_copy_tool_options (G_OBJECT (preset->tool_options),
+                                  G_OBJECT (preset_tool->tool_options));
+}
+
+static void
+tool_manager_image_clean_dirty (GimpImage       *image,
+                                GimpDirtyMask    dirty_mask,
+                                GimpToolManager *tool_manager)
+{
+  GimpTool *tool = tool_manager->active_tool;
+
+  if (tool &&
+      ! gimp_tool_control_get_preserve (tool->control) &&
+      (gimp_tool_control_get_dirty_mask (tool->control) & dirty_mask))
+    {
+      GimpDisplay *display = gimp_tool_has_image (tool, image);
+
+      if (display)
+        {
+          tool_manager_control_active (
+            image->gimp,
+            gimp_tool_control_get_dirty_action (tool->control),
+            display);
+        }
+    }
+}
+
+static void
+tool_manager_image_saving (GimpImage       *image,
+                           GimpToolManager *tool_manager)
+{
+  GimpTool *tool = tool_manager->active_tool;
+
+  if (tool &&
+      ! gimp_tool_control_get_preserve (tool->control))
+    {
+      GimpDisplay *display = gimp_tool_has_image (tool, image);
+
+      if (display)
+        tool_manager_control_active (image->gimp, GIMP_TOOL_ACTION_COMMIT,
+                                     display);
+    }
+}
+
+static void
+tool_manager_tool_ancestry_changed (GimpToolInfo    *tool_info,
+                                    GimpToolManager *tool_manager)
+{
+  GimpViewable *parent;
+
+  parent = gimp_viewable_get_parent (GIMP_VIEWABLE (tool_info));
+
+  if (parent)
+    {
+      gimp_tool_group_set_active_tool_info (GIMP_TOOL_GROUP (parent),
+                                            tool_info);
+    }
+
+  tool_manager_set_active_tool_group (tool_manager, GIMP_TOOL_GROUP (parent));
+}
+
+static void
+tool_manager_group_active_tool_changed (GimpToolGroup   *tool_group,
+                                        GimpToolManager *tool_manager)
+{
+  gimp_context_set_tool (tool_manager->gimp->user_context,
+                         gimp_tool_group_get_active_tool_info (tool_group));
+}
+
+static void
+tool_manager_cast_spell (GimpToolInfo *tool_info)
+{
+  typedef struct
+  {
+    const gchar *sequence;
+    GCallback    func;
+  } Spell;
+
+  static const Spell spells[] =
+  {
+    { .sequence = "gimp-warp-tool\0"
+                  "gimp-iscissors-tool\0"
+                  "gimp-gradient-tool\0"
+                  "gimp-vector-tool\0"
+                  "gimp-ellipse-select-tool\0"
+                  "gimp-rect-select-tool\0",
+      .func     = gimp_cairo_wilber_toggle_pointer_eyes
+    }
+  };
+
+  static const gchar *spell_progress[G_N_ELEMENTS (spells)];
+  const gchar        *tool_name;
+  gint                i;
+
+  tool_name = gimp_object_get_name (GIMP_OBJECT (tool_info));
+
+  for (i = 0; i < G_N_ELEMENTS (spells); i++)
+    {
+      if (! spell_progress[i])
+        spell_progress[i] = spells[i].sequence;
+
+      while (spell_progress[i])
+        {
+          if (! strcmp (tool_name, spell_progress[i]))
+            {
+              spell_progress[i] += strlen (spell_progress[i]) + 1;
+
+              if (! *spell_progress[i])
+                {
+                  spell_progress[i] = NULL;
+
+                  spells[i].func ();
+                }
+
+              break;
+            }
+          else
+            {
+              if (spell_progress[i] == spells[i].sequence)
+                spell_progress[i] = NULL;
+              else
+                spell_progress[i] = spells[i].sequence;
+            }
+        }
+    }
+}