def should_submit_on_enter(buf):
"""
Check whether we should submit the buffer, after enter was pressed.
"""
# This is a bit hacky - we want to look for unmatched brackets in the
# entire document, but find_enclosing_bracket_left starts from the
# current position. So create a new document.
doc = Document(buf.document.text, cursor_position=len(buf.document.text))
if (doc.find_enclosing_bracket_left("(", ")")
or doc.find_enclosing_bracket_left("[", "]")
or doc.find_enclosing_bracket_left("{", "}")
or continue_re.match(doc.current_line)):
return False
else:
return True
