diff options
Diffstat (limited to 'portato')
| -rw-r--r-- | portato/gui/gtk/windows.py | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/portato/gui/gtk/windows.py b/portato/gui/gtk/windows.py index 50acdb8..c6aaab6 100644 --- a/portato/gui/gtk/windows.py +++ b/portato/gui/gtk/windows.py @@ -41,6 +41,26 @@ from .dialogs import (blocked_dialog, changed_flags_dialog, io_ex_dialog, nothing_found_dialog, queue_not_empty_dialog, remove_deps_dialog, remove_queue_dialog, remove_updates_dialog, unmask_dialog) +# the current version for saved sessions +# change this, whenever the change is incompatible with previous versions +SESSION_VERSION = 1 + +class SessionException (Exception): + + error = _("Version mismatch.") + def __init__ (self, got, expected): + self.got = got + self.expected = expected + + def __str__ (self): + return "%s %s" % (self.error, (_("Got '%d' - expected '%d'.") % (self.got, self.expected))) + +class OldSessionException (SessionException): + error = _("Current session format is too old.") + +class NewSessionException (SessionException): + error = _("Current session format is newer than this version supports.") + class AboutWindow (AbstractDialog): """A window showing the "about"-informations.""" @@ -1142,7 +1162,13 @@ class MainWindow (Window): # session splash(_("Restoring Session")) - self.load_session() + try: + try: + self.load_session() + except OldSessionException, e: + self.load_session(e) + except SessionException, e: + warning(str(e)) splash(_("Finishing startup")) @@ -1280,7 +1306,7 @@ class MainWindow (Window): except AttributeError: # no selCatName -> so no category selected --> ignore debug("No category selected --> should be no harm.") - def load_session(self): + def load_session(self, sessionEx = None): """ Loads the session data. """ @@ -1290,11 +1316,21 @@ class MainWindow (Window): io_ex_dialog(e) return + oldVersion = SESSION_VERSION + allowedVersions = (0,) + + if sessionEx and isinstance(sessionEx, SessionException): + if sessionEx.got in allowedVersions: + info(_("Translating session from version %d to %d.") % (sessionEx.got, sessionEx.expected)) + oldVersion = sessionEx.got + else: + warning(_("Cannot translate session from version %d to %d.") % (session.got, session.expected)) + raise session_ex + # # the callbacks for the different session variables # - # QUEUE def load_queue (merge, unmerge, oneshot): def _load(q, **kwargs): @@ -1371,13 +1407,26 @@ class MainWindow (Window): return "" return _save + # SESSION VERSION + def load_session_version (version): + if oldVersion != SESSION_VERSION: # we are trying to convert + return + + version = int(version) + + if version < SESSION_VERSION: + raise OldSessionException(version, SESSION_VERSION) + elif version > SESSION_VERSION: + raise NewSessionException(version, SESSION_VERSION) + # set the simple ones :) map(self.session.add_handler,[ + ([("gtksessionversion", "session")], load_session_version, lambda: SESSION_VERSION), ([("width", "window"), ("height", "window")], lambda w,h: self.window.resize(int(w), int(h)), self.window.get_size), ([("vpanedpos", "window"), ("hpanedpos", "window")], load_paned, save_paned), ([("catsel", "window")], load_selection(self.catList, 0), save_cat_selection), - ([("pkgsel", "window")], load_selection(self.pkgList, 1), save_pkg_selection), - ([("merge", "queue"), ("unmerge", "queue"), ("oneshot", "queue")], load_queue, save_queue) + ([("pkgsel", "window")], load_selection(self.pkgList, 1), save_pkg_selection) + #([("merge", "queue"), ("unmerge", "queue"), ("oneshot", "queue")], load_queue, save_queue), ]) # set the plugins |