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, 26 insertions, 4 deletions

diff --git a/source/blender/editors/space_file/space_file.c b/source/blender/editors/space_file/space_file.c
index 9c30a0ed988..3167d2809c9 100644
--- a/source/blender/editors/space_file/space_file.c
+++ b/source/blender/editors/space_file/space_file.c
@@ -124,6 +124,18 @@ static void file_free(SpaceLink *sl)
 		sfile->files= NULL;
 	}
 
+	if(sfile->folders_prev) {
+		folderlist_free(sfile->folders_prev);
+		MEM_freeN(sfile->folders_prev);
+		sfile->folders_prev= NULL;
+	}
+
+	if(sfile->folders_next) {
+		folderlist_free(sfile->folders_next);
+		MEM_freeN(sfile->folders_next);
+		sfile->folders_next= NULL;
+	}
+
 	if (sfile->params) {
 		if(sfile->params->pupmenu)
 			MEM_freeN(sfile->params->pupmenu);
@@ -153,11 +165,15 @@ static SpaceLink *file_duplicate(SpaceLink *sl)
 	sfilen->op = NULL; /* file window doesn't own operators */
 
 	sfilen->files = filelist_new();
-	
+	if(sfileo->folders_prev)
+		sfilen->folders_prev = MEM_dupallocN(sfileo->folders_prev);
+
+	if(sfileo->folders_next)
+		sfilen->folders_next = MEM_dupallocN(sfileo->folders_next);
+
 	if(sfileo->params) {
 		sfilen->params= MEM_dupallocN(sfileo->params);
-	
-		filelist_setdir(sfilen->files, sfilen->params->dir);
+		file_change_dir(sfilen);
 	}
 	if (sfileo->layout) {
 		sfilen->layout= MEM_dupallocN(sfileo->layout);
@@ -170,9 +186,11 @@ static void file_refresh(const bContext *C, ScrArea *sa)
 	SpaceFile *sfile= (SpaceFile*)CTX_wm_space_data(C);
 	FileSelectParams *params = ED_fileselect_get_params(sfile);
 
+	if (!sfile->folders_prev)
+		sfile->folders_prev = folderlist_new();
 	if (!sfile->files) {
 		sfile->files = filelist_new();
-		filelist_setdir(sfile->files, params->dir);
+		file_change_dir(sfile);
 		params->active_file = -1; // added this so it opens nicer (ton)
 	}
 	filelist_hidedot(sfile->files, params->flag & FILE_HIDE_DOT);
@@ -295,6 +313,8 @@ void file_operatortypes(void)
 	WM_operatortype_append(FILE_OT_exec);
 	WM_operatortype_append(FILE_OT_cancel);
 	WM_operatortype_append(FILE_OT_parent);
+	WM_operatortype_append(FILE_OT_previous);
+	WM_operatortype_append(FILE_OT_next);
 	WM_operatortype_append(FILE_OT_refresh);
 	WM_operatortype_append(FILE_OT_bookmark_toggle);
 	WM_operatortype_append(FILE_OT_add_bookmark);
@@ -313,6 +333,8 @@ void file_keymap(struct wmWindowManager *wm)
 	WM_keymap_add_item(keymap, "FILE_OT_parent", PKEY, KM_PRESS, 0, 0);
 	WM_keymap_add_item(keymap, "FILE_OT_add_bookmark", BKEY, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_add_item(keymap, "FILE_OT_hidedot", HKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "FILE_OT_previous", BACKSPACEKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "FILE_OT_next", BACKSPACEKEY, KM_PRESS, KM_SHIFT, 0);
 
 	/* keys for main area */
 	keymap= WM_keymap_listbase(wm, "FileMain", SPACE_FILE, 0);