rename mvc at lvc

1 files changed, 89 insertions, 0 deletions

diff --git a/lvc/errors.py b/lvc/errors.py
new file mode 100644
index 0000000..504948b
--- /dev/null
+++ b/lvc/errors.py
@@ -0,0 +1,89 @@
+# @Base: Miro - an RSS based video player application
+# Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+# Participatory Culture Foundation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link the code of portions of this program with the OpenSSL
+# library.
+#
+# You must obey the GNU General Public License in all respects for all of
+# the code used other than OpenSSL. If you modify file(s) with this
+# exception, you may extend this exception to your version of the file(s),
+# but you are not obligated to do so. If you do not wish to do so, delete
+# this exception statement from your version. If you delete this exception
+# statement from all source files in the program, then also delete it here.
+
+"""``miro.errors`` -- Miro exceptions.
+"""
+
+class ActionUnavailableError(ValueError):
+    """The action attempted can not be done in the current state."""
+    def __init__(self, reason):
+        self.reason = reason
+
+class WidgetActionError(ActionUnavailableError):
+    """The widget is not in the right state to perform the requested action.
+    This usually is not serious, but if not handled the UI will likely be in an
+    incorrect state.
+    """
+
+class WidgetDomainError(WidgetActionError):
+    """The widget element requested is not available at this time. This may be a
+    temporary condition or a result of permanent changes.
+    """
+    def __init__(self, domain, needle, haystack, details=None):
+        self.domain = domain
+        self.needle = needle
+        self.haystack = haystack
+        self.details = details
+
+    @property
+    def reason(self):
+        reason = "looked for {0} in {2}, but found only {1}".format(
+            repr(self.needle), repr(self.haystack), self.domain)
+        if self.details:
+            reason += ": " + self.details
+        return reason
+
+class WidgetRangeError(WidgetDomainError):
+    """Class to handle neat display of ranges in WidgetDomainErrors. Handlers
+    should generally catch a parent of this.
+    """
+    def __init__(self, domain, needle, start_range, end_range, details=None):
+        haystack = "{0} to {1}".format(repr(start_range), repr(end_range))
+        WidgetDomainError.__init__(self, domain, needle, haystack, details)
+
+class WidgetNotReadyError(WidgetActionError):
+    """The widget is not ready to perfom the action given; this must be a
+    temporary condition that will be resolved when the widget finishes setting
+    up.
+    """
+    def __init__(self, waiting_for):
+        self.waiting_for = waiting_for
+
+    @property
+    def reason(self):
+        return "waiting for {0}".format(self.waiting_for)
+
+class UnexpectedWidgetError(ActionUnavailableError):
+    """The Spanish Inquisition of widget errors. A widget was asked to do
+    something, had every reason to do so, yet refused. This should always cause
+    at least a soft_failure; the UI is now in an incorrect state.
+    """
+
+class WidgetUsageError(UnexpectedWidgetError):
+    """A widget error that is likely the result of incorrect widget usage."""