Mercurial > libervia-backend
changeset 2531:1dfc5516dead
frontends (tools/misc): new FlagsHandler class, a simple class to help handling option flags
author | Goffi <goffi@goffi.org> |
---|---|
date | Wed, 21 Mar 2018 19:07:06 +0100 (2018-03-21) |
parents | 0cb32e503aff |
children | 772447ec070f |
files | frontends/src/tools/misc.py |
diffstat | 1 files changed, 28 insertions(+), 0 deletions(-) [+] |
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--- a/frontends/src/tools/misc.py Wed Mar 21 19:07:00 2018 +0100 +++ b/frontends/src/tools/misc.py Wed Mar 21 19:07:06 2018 +0100 @@ -60,3 +60,31 @@ if callback is not None: callback(self.input_history_tmp[index_tmp]) self.input_history_index = index_tmp + + +class FlagsHandler(object): + """Small class to handle easily option flags + + the instance is initialized with an iterable + then attribute return True if flag is set, False else. + WARNING: If a flag is checked, it is removed (i.e. unset) + this is done to use bool(flags_handler) to check if all flags + have been used + """ + + def __init__(self, flags): + self.flags = set(flags or []) + + def __getattr__(self, flag): + try: + self.flags.remove(flag) + except KeyError: + return False + else: + return True + + def __len__(self): + return len(self.flags) + + def __iter__(self): + return self.flags.__iter__()