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When rewinding checkpoints preserve the message

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Kovid Goyal 2014-02-02 12:33:42 +05:30
parent 2f2723f6b6
commit 99308e0f86
1 changed files with 3 additions and 1 deletions
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4
src/calibre/gui2/tweak_book/undo.py
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@ -30,6 +30,7 @@ class State(object):
def __init__(self, container):
self.container = container
self.message = None
self.rewind_message = None
class GlobalUndoHistory(QAbstractListModel):
@ -82,6 +83,7 @@ class GlobalUndoHistory(QAbstractListModel):
def add_savepoint(self, new_container, message):
try:
self.states[self.pos].rewind_message = self.states[self.pos].message
self.states[self.pos].message = message
except IndexError:
raise IndexError('The checkpoint stack has an incorrect position pointer. This should never happen: self.pos = %r, len(self.states) = %r' % (
@ -118,7 +120,7 @@ class GlobalUndoHistory(QAbstractListModel):
self.endRemoveRows()
self.dataChanged.emit(self.index(self.pos), self.index(self.pos))
ans = self.current_container
ans.message = None
self.states[self.pos].message = self.states[self.pos].rewind_message
return ans
def undo(self):