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  • Committer: Michael Ellerman
  • Date: 2005-10-19 11:34:39 UTC
  • mto: (0.3.1 shelf-dev) (325.1.2 bzrtools)
  • mto: This revision was merged to the branch mainline in revision 246.
  • Revision ID: michael@ellerman.id.au-20051019113439-193bca379eec5798
Move all shelf functions into a class. Only logic change is we save the
bzr root dir rather than recomputing it again and again.

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userinteractor.py
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import sys
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class UserOption:
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    def __init__(self, char, action, help, default=False):
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        self.char = char
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        self.action = action
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        self.default = default
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        self.help = help
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class UserInteractor(object):
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    # Special actions
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    RESTART = 0
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    QUIT = 1
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    FINISH = 2
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    def __init__(self):
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        self.items = []
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    def add_item(self, item):
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        self.items.append(item)
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        self.__total_items = len(self.items)
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    def set_items(self, item_list):
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        self.items = item_list
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        self.__total_items = len(self.items)
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    def set_item_callback(self, cb):
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        self.item_callback = cb
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    def set_start_callback(self, cb):
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        self.start_callback = cb
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    def set_end_callback(self, cb):
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        self.end_callback = cb
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    def set_prompt(self, prompt):
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        self.prompt = prompt
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    def set_options(self, opt_list):
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        self._options = []
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        self._option_dict = {}
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        for option in opt_list:
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            self.add_option(option)
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    def add_option(self, option):
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        self._options.append(option)
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        self._option_dict[option.char] = option
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    def get_option(self, char):
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        return self._option_dict[char]
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    def __do_action(self, action, item):
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        if type(action) is int:
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            if action == self.QUIT:
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                self.__quit = True
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                self.__finished = True
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            elif action == self.RESTART:
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                self.__restart = True
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                self.__finished = False
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            elif action == self.FINISH:
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                self.__finished = True
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            return True
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        else:
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            return action(item)
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    def __select_loop(self):
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        i = 0
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        self.start_callback()
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        while i < len(self.items):
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                item = self.items[i]
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                self.item_callback(item, i + 1)
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                if self.__ask_once(item, i + 1):
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                    i += 1
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                if self.__quit or self.__finished:
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                    break
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    def interact(self):
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        self.__quit = False
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        self.__finished = False
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        while not self.__quit and not self.__finished:
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            self.__restart = False
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            self.__select_loop()
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            if self.__quit:
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                break
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            if self.end_callback():
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                break
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            self.__finished = False
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            self.__ask_once(None, self.__total_items)
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            while not self.__finished and not self.__restart:
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                self.__ask_once(None, -1)
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        return not self.__quit
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    def __ask_once(self, item, count):
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        args = {'count': count, 'total' : self.__total_items}
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        while True:
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            sys.stdout.write(self.prompt % args)
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            sys.stdout.write(' [')
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            for opt in self._options:
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                if opt.default:
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                    default = opt
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                sys.stdout.write(opt.char)
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            sys.stdout.write('?] (%s): ' % default.char)
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            response = self.__getchar()
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            # default, which we see as newline, is 'n'
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            if response in ['\n', '\r', '\r\n']:
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                response = default.char
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            print response # because echo is off
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            for opt in self._options:
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                if opt.char == response:
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                    return self.__do_action(opt.action, item)
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            self.__show_help()
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        return False # keep pychecker happy
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    def __show_help(self):
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        for opt in self._options:
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            print '  %s - %s' % (opt.char, opt.help)
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    if sys.platform == "win32":
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        def __getchar(self):
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            import msvcrt
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            return msvcrt.getch()
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    else:
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        def __getchar(self):
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            import tty
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            import termios
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            fd = sys.stdin.fileno()
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            settings = termios.tcgetattr(fd)
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            try:
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                tty.setraw(fd)
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                ch = sys.stdin.read(1)
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            finally:
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                termios.tcsetattr(fd, termios.TCSADRAIN, settings)
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            return ch