UI: File Close Dialog

This adds a new dialog that is shown whenever a file is closed.
So, either when a new file is opened, or when Blender quits.
The dialog allows to save unsaved changes. Furthermore it also
allows saving images that have been modified in Blender, but are
not saved yet.

Known limitations:
* Images that have no file path and have not been packed before,
  are not saved.
* On MacOS the old dialog is shown when Blender quits.

Reviewers: brecht, billreynish

Differential Revision: https://developer.blender.org/D4860

1 files changed, 11 insertions, 0 deletions

diff --git a/source/blender/windowmanager/wm_files.h b/source/blender/windowmanager/wm_files.h
index 24209504a07..8b3f1ead215 100644
--- a/source/blender/windowmanager/wm_files.h
+++ b/source/blender/windowmanager/wm_files.h
@@ -40,6 +40,17 @@ void wm_homefile_read(struct bContext *C,
                       bool *r_is_factory_startup);
 void wm_file_read_report(bContext *C, struct Main *bmain);
 
+typedef struct GenericCallback {
+  void (*exec)(bContext *C, void *user_data);
+  void *user_data;
+  void (*free_user_data)(void *user_data);
+} GenericCallback;
+
+GenericCallback *wm_generic_callback_steal(GenericCallback *callback);
+void wm_generic_callback_free(GenericCallback *callback);
+void wm_close_file_dialog(bContext *C, GenericCallback *post_action);
+bool wm_file_or_image_is_modified(const struct bContext *C);
+
 void WM_OT_save_homefile(struct wmOperatorType *ot);
 void WM_OT_userpref_autoexec_path_add(struct wmOperatorType *ot);
 void WM_OT_userpref_autoexec_path_remove(struct wmOperatorType *ot);