2.5 filebrowser: previous/next + bugfix + elubie's changes and cleanup

* Previous/Next Folder browser
* bugfix: "open most recently opened directory".

* Previous and Next functionalities:
- use BACKSPACE to navigate to previous folders
- use SHIFT+BACKSPACE to navigate forward
- once you change the folder by other ways the forward folder list is cleared

* bug fix: the sfile->params->dir set through ED_fileselect_set_params wasn't correct. According to the code taking the settings from the existing (previous) filebrowser is a temp solution. In that case this is a fix for a temp solution :)
(changes in: wm_event_system.c, filesel.c and ED_fileselect.h)

** Andrea(elubie): we can get away of the folderlist_clear_next test if we manually pass a boolean to file_change_dir (e.g. file_change_dir(sfile, true)). I tried not to mess up with your changes here. It's slightly slower (and maybe hacky) but its's more conservative IMHO.

(my first commit to 2.5 ... that was a good reason to put my paper on hold :p)

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/file_intern.h b/source/blender/editors/space_file/file_intern.h
index 5a440be6962..2f3fae47abb 100644
--- a/source/blender/editors/space_file/file_intern.h
+++ b/source/blender/editors/space_file/file_intern.h
@@ -65,6 +65,8 @@ void FILE_OT_loadimages(struct wmOperatorType *ot);
 void FILE_OT_exec(struct wmOperatorType *ot);
 void FILE_OT_cancel(struct wmOperatorType *ot);
 void FILE_OT_parent(struct wmOperatorType *ot);
+void FILE_OT_previous(struct wmOperatorType *ot);
+void FILE_OT_next(struct wmOperatorType *ot);
 void FILE_OT_refresh(struct wmOperatorType *ot);
 void FILE_OT_bookmark_toggle(struct wmOperatorType *ot);
 void FILE_OT_filenum(struct wmOperatorType *ot);
@@ -72,11 +74,14 @@ void FILE_OT_filenum(struct wmOperatorType *ot);
 int file_exec(bContext *C, struct wmOperator *unused);
 int file_cancel_exec(bContext *C, struct wmOperator *unused);
 int file_parent_exec(bContext *C, struct wmOperator *unused);
+int file_previous_exec(bContext *C, struct wmOperator *unused);
+int file_next_exec(bContext *C, struct wmOperator *unused);
 int file_hilight_set(struct SpaceFile *sfile, struct ARegion *ar, int mx, int my);
 
 /* filesel.c */
 float file_string_width(const char* str);
 float file_font_pointsize();
+void file_change_dir(struct SpaceFile *sfile);
 
 /* file_panels.c */
 void file_panels_register(struct ARegionType *art);