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| """String dispatch class to match regexps and dispatch commands. | |
| """ | |
| # Stdlib imports | |
| import re | |
| # Our own modules | |
| from IPython.core.hooks import CommandChainDispatcher | |
| # Code begins | |
| class StrDispatch(object): | |
| """Dispatch (lookup) a set of strings / regexps for match. | |
| Example: | |
| >>> dis = StrDispatch() | |
| >>> dis.add_s('hei',34, priority = 4) | |
| >>> dis.add_s('hei',123, priority = 2) | |
| >>> dis.add_re('h.i', 686) | |
| >>> print(list(dis.flat_matches('hei'))) | |
| [123, 34, 686] | |
| """ | |
| def __init__(self): | |
| self.strs = {} | |
| self.regexs = {} | |
| def add_s(self, s, obj, priority= 0 ): | |
| """ Adds a target 'string' for dispatching """ | |
| chain = self.strs.get(s, CommandChainDispatcher()) | |
| chain.add(obj,priority) | |
| self.strs[s] = chain | |
| def add_re(self, regex, obj, priority= 0 ): | |
| """ Adds a target regexp for dispatching """ | |
| chain = self.regexs.get(regex, CommandChainDispatcher()) | |
| chain.add(obj,priority) | |
| self.regexs[regex] = chain | |
| def dispatch(self, key): | |
| """ Get a seq of Commandchain objects that match key """ | |
| if key in self.strs: | |
| yield self.strs[key] | |
| for r, obj in self.regexs.items(): | |
| if re.match(r, key): | |
| yield obj | |
| else: | |
| #print "nomatch",key # dbg | |
| pass | |
| def __repr__(self): | |
| return "<Strdispatch %s, %s>" % (self.strs, self.regexs) | |
| def s_matches(self, key): | |
| if key not in self.strs: | |
| return | |
| for el in self.strs[key]: | |
| yield el[1] | |
| def flat_matches(self, key): | |
| """ Yield all 'value' targets, without priority """ | |
| for val in self.dispatch(key): | |
| for el in val: | |
| yield el[1] # only value, no priority | |
| return | |