def __init__(self, textbuffer):
self.undo_stack = UndoStack(MAX_UNDOS)
self._next_action = None
self._buffer = textbuffer
self.after_changed = Listeners()
def __init__(self, textbuffer):
self.undo_stack = UndoStack(MAX_UNDOS)
self._next_action = None
self._buffer = textbuffer
self.after_changed = Listeners()
class UndoHandler(object):
"""TextBuffer Handler that provides undo/redo functionality"""
def __init__(self, textbuffer):
self.undo_stack = UndoStack(MAX_UNDOS)
self._next_action = None
self._buffer = textbuffer
self.after_changed = Listeners()
def on_insert_text(self, textbuffer, it, text, length):
"""Callback for text insert"""
# NOTE: GTK does not give us a proper UTF string, so fix it
text = unicode(text, "utf_8")
length = len(text)
# setup next action
offset = it.get_offset()
self._next_action = InsertAction(
textbuffer,
offset,
text,
length,
cursor_insert=(offset == textbuffer.get_iter_at_mark(
textbuffer.get_insert()).get_offset()))
def on_delete_range(self, textbuffer, start, end):
"""Callback for delete range"""
# setup next action
self._next_action = DeleteAction(
textbuffer, start.get_offset(), end.get_offset(),
start.get_slice(end),
textbuffer.get_iter_at_mark(textbuffer.get_insert()).get_offset())
def on_insert_pixbuf(self, textbuffer, it, pixbuf):
"""Callback for inserting a pixbuf"""
pass
def on_insert_child_anchor(self, textbuffer, it, anchor):
"""Callback for inserting a child anchor"""
# setup next action
self._next_action = InsertChildAction(textbuffer, it.get_offset(),
anchor)
def on_apply_tag(self, textbuffer, tag, start, end):
"""Callback for tag apply"""
if not isinstance(tag, RichTextTag):
# do not process tags that are not rich text
# i.e. gtkspell tags (ignored by undo/redo)
return
action = TagAction(textbuffer, tag, start.get_offset(),
end.get_offset(), True)
self.undo_stack.do(action.do, action.undo, False)
textbuffer.set_modified(True)
def on_remove_tag(self, textbuffer, tag, start, end):
"""Callback for tag remove"""
if not isinstance(tag, RichTextTag):
# do not process tags that are not rich text
# i.e. gtkspell tags (ignored by undo/redo)
return
action = TagAction(textbuffer, tag, start.get_offset(),
end.get_offset(), False)
self.undo_stack.do(action.do, action.undo, False)
textbuffer.set_modified(True)
def on_changed(self, textbuffer):
"""Callback for buffer change"""
# process actions that have changed the buffer
if not self._next_action:
return
textbuffer.begin_user_action()
# add action to undo stack
action = self._next_action
self._next_action = None
self.undo_stack.do(action.do, action.undo, False)
# perfrom additional "clean-up" actions
# note: only if undo/redo is not currently in progress
if not self.undo_stack.is_in_progress():
self.after_changed.notify(action)
textbuffer.end_user_action()
class UndoHandler(object):
"""TextBuffer Handler that provides undo/redo functionality"""
def __init__(self, textbuffer):
self.undo_stack = UndoStack(MAX_UNDOS)
self._next_action = None
self._buffer = textbuffer
self.after_changed = Listeners()
def on_insert_text(self, textbuffer, it, text, length):
"""Callback for text insert"""
# NOTE: GTK does not give us a proper UTF string, so fix it
text = unicode(text, "utf_8")
length = len(text)
# setup next action
offset = it.get_offset()
self._next_action = InsertAction(
textbuffer,
offset,
text,
length,
cursor_insert=(offset == textbuffer.get_iter_at_mark(textbuffer.get_insert()).get_offset()),
)
def on_delete_range(self, textbuffer, start, end):
"""Callback for delete range"""
# setup next action
self._next_action = DeleteAction(
textbuffer,
start.get_offset(),
end.get_offset(),
start.get_slice(end),
textbuffer.get_iter_at_mark(textbuffer.get_insert()).get_offset(),
)
def on_insert_pixbuf(self, textbuffer, it, pixbuf):
"""Callback for inserting a pixbuf"""
pass
def on_insert_child_anchor(self, textbuffer, it, anchor):
"""Callback for inserting a child anchor"""
# setup next action
self._next_action = InsertChildAction(textbuffer, it.get_offset(), anchor)
def on_apply_tag(self, textbuffer, tag, start, end):
"""Callback for tag apply"""
if not isinstance(tag, RichTextTag):
# do not process tags that are not rich text
# i.e. gtkspell tags (ignored by undo/redo)
return
action = TagAction(textbuffer, tag, start.get_offset(), end.get_offset(), True)
self.undo_stack.do(action.do, action.undo, False)
textbuffer.set_modified(True)
def on_remove_tag(self, textbuffer, tag, start, end):
"""Callback for tag remove"""
if not isinstance(tag, RichTextTag):
# do not process tags that are not rich text
# i.e. gtkspell tags (ignored by undo/redo)
return
action = TagAction(textbuffer, tag, start.get_offset(), end.get_offset(), False)
self.undo_stack.do(action.do, action.undo, False)
textbuffer.set_modified(True)
def on_changed(self, textbuffer):
"""Callback for buffer change"""
# process actions that have changed the buffer
if not self._next_action:
return
textbuffer.begin_user_action()
# add action to undo stack
action = self._next_action
self._next_action = None
self.undo_stack.do(action.do, action.undo, False)
# perfrom additional "clean-up" actions
# note: only if undo/redo is not currently in progress
if not self.undo_stack.is_in_progress():
self.after_changed.notify(action)
textbuffer.end_user_action()