[gimp] Issue #2222 - Warp Transform doesn't commit changes upon saving ...

[Ell <ell src gnome org>]

commit ae628a86640cfc8c2bc0e420c23518c03b65361b
Author: Ell <ell_se yahoo com>
Date:   Sat Sep 29 02:25:34 2018 -0400

    Issue #2222 - Warp Transform doesn't commit changes upon saving ...
    
    ... the XCF file
    
    Add a "saving" signal to GimpImage, which is emitted when the image
    is about to be saved or exported (but before it's actually saved/
    exported).  Connect to this signal in tool-manager, and commit the
    current tool in response (unless its GimpToolControl::preserve is
    TRUE).

 app/core/gimpimage.c     | 26 ++++++++++++++++++++++++++
 app/core/gimpimage.h     |  2 ++
 app/file/file-save.c     |  2 ++
 app/tools/tool_manager.c | 27 +++++++++++++++++++++++++++
 4 files changed, 57 insertions(+)
---
diff --git a/app/core/gimpimage.c b/app/core/gimpimage.c
index 343f1f6a6f..566f0159d7 100644
--- a/app/core/gimpimage.c
+++ b/app/core/gimpimage.c
@@ -111,6 +111,7 @@ enum
   SELECTION_INVALIDATE,
   CLEAN,
   DIRTY,
+  SAVING,
   SAVED,
   EXPORTED,
   GUIDE_ADDED,
@@ -431,6 +432,15 @@ gimp_image_class_init (GimpImageClass *klass)
                   G_TYPE_NONE, 1,
                   GIMP_TYPE_DIRTY_MASK);
 
+  gimp_image_signals[SAVING] =
+    g_signal_new ("saving",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpImageClass, saving),
+                  NULL, NULL,
+                  gimp_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+
   gimp_image_signals[SAVED] =
     g_signal_new ("saved",
                   G_TYPE_FROM_CLASS (klass),
@@ -588,6 +598,7 @@ gimp_image_class_init (GimpImageClass *klass)
 
   klass->clean                        = NULL;
   klass->dirty                        = NULL;
+  klass->saving                       = NULL;
   klass->saved                        = NULL;
   klass->exported                     = NULL;
   klass->guide_added                  = NULL;
@@ -3413,6 +3424,21 @@ gimp_image_get_dirty_time (GimpImage *image)
   return GIMP_IMAGE_GET_PRIVATE (image)->dirty_time;
 }
 
+/**
+ * gimp_image_saving:
+ * @image:
+ *
+ * Emits the "saving" signal, indicating that @image is about to be saved,
+ * or exported.
+ */
+void
+gimp_image_saving (GimpImage *image)
+{
+  g_return_if_fail (GIMP_IS_IMAGE (image));
+
+  g_signal_emit (image, gimp_image_signals[SAVING], 0);
+}
+
 /**
  * gimp_image_saved:
  * @image:
diff --git a/app/core/gimpimage.h b/app/core/gimpimage.h
index fd404404d7..da851e6d84 100644
--- a/app/core/gimpimage.h
+++ b/app/core/gimpimage.h
@@ -76,6 +76,7 @@ struct _GimpImageClass
                                          GimpDirtyMask         dirty_mask);
   void (* dirty)                        (GimpImage            *image,
                                          GimpDirtyMask         dirty_mask);
+  void (* saving)                       (GimpImage            *image);
   void (* saved)                        (GimpImage            *image,
                                          GFile                *file);
   void (* exported)                     (GimpImage            *image,
@@ -169,6 +170,7 @@ GimpPlugInProcedure * gimp_image_get_load_proc   (GimpImage          *image);
 void            gimp_image_set_save_proc         (GimpImage          *image,
                                                   GimpPlugInProcedure *proc);
 GimpPlugInProcedure * gimp_image_get_save_proc   (GimpImage          *image);
+void            gimp_image_saving                (GimpImage          *image);
 void            gimp_image_saved                 (GimpImage          *image,
                                                   GFile              *file);
 void            gimp_image_set_export_proc       (GimpImage          *image,
diff --git a/app/file/file-save.c b/app/file/file-save.c
index 334455f43b..252d62a280 100644
--- a/app/file/file-save.c
+++ b/app/file/file-save.c
@@ -89,6 +89,8 @@ file_save (Gimp                *gimp,
   g_object_ref (image);
   g_object_ref (file);
 
+  gimp_image_saving (image);
+
   drawable = gimp_image_get_active_drawable (image);
 
   if (! drawable)
diff --git a/app/tools/tool_manager.c b/app/tools/tool_manager.c
index c74652d2ab..0921a35fc7 100644
--- a/app/tools/tool_manager.c
+++ b/app/tools/tool_manager.c
@@ -54,6 +54,7 @@ struct _GimpToolManager
 
   GQuark    image_clean_handler_id;
   GQuark    image_dirty_handler_id;
+  GQuark    image_saving_handler_id;
 };
 
 
@@ -72,6 +73,8 @@ static void   tool_manager_preset_changed     (GimpContext     *user_context,
 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_cast_spell         (GimpToolInfo    *tool_info);
 
@@ -106,6 +109,11 @@ tool_manager_init (Gimp *gimp)
                                 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",
@@ -145,6 +153,8 @@ tool_manager_exit (Gimp *gimp)
                                  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);
 
   g_clear_object (&tool_manager->active_tool);
 
@@ -771,6 +781,23 @@ tool_manager_image_clean_dirty (GimpImage       *image,
     }
 }
 
+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_cast_spell (GimpToolInfo *tool_info)
 {