167 lines
5.4 KiB
Python
167 lines
5.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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`rawlist` type question
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"""
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from __future__ import print_function, unicode_literals
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import sys
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from libs.prompt_toolkit.application import Application
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from libs.prompt_toolkit.key_binding.manager import KeyBindingManager
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from libs.prompt_toolkit.keys import Keys
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from libs.prompt_toolkit.layout.containers import Window
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from libs.prompt_toolkit.filters import IsDone
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from libs.prompt_toolkit.layout.controls import TokenListControl
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from libs.prompt_toolkit.layout.containers import ConditionalContainer, HSplit
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from libs.prompt_toolkit.layout.dimension import LayoutDimension as D
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from libs.prompt_toolkit.token import Token
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from .. import PromptParameterException
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from ..separator import Separator
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from .common import default_style
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from .common import if_mousedown
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PY3 = sys.version_info[0] >= 3
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if PY3:
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basestring = str
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# custom control based on TokenListControl
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class InquirerControl(TokenListControl):
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def __init__(self, choices, **kwargs):
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self.pointer_index = 0
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self.answered = False
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self._init_choices(choices)
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super(InquirerControl, self).__init__(self._get_choice_tokens,
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**kwargs)
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def _init_choices(self, choices):
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# helper to convert from question format to internal format
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self.choices = [] # list (key, name, value)
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searching_first_choice = True
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key = 1 # used for numeric keys
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for i, c in enumerate(choices):
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if isinstance(c, Separator):
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self.choices.append(c)
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else:
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if isinstance(c, basestring):
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self.choices.append((key, c, c))
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key += 1
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if searching_first_choice:
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self.pointer_index = i # found the first choice
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searching_first_choice = False
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@property
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def choice_count(self):
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return len(self.choices)
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def _get_choice_tokens(self, cli):
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tokens = []
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T = Token
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def _append(index, line):
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if isinstance(line, Separator):
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tokens.append((T.Separator, ' %s\n' % line))
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else:
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key = line[0]
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line = line[1]
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pointed_at = (index == self.pointer_index)
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@if_mousedown
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def select_item(cli, mouse_event):
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# bind option with this index to mouse event
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self.pointer_index = index
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if pointed_at:
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tokens.append((T.Selected, ' %d) %s' % (key, line),
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select_item))
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else:
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tokens.append((T, ' %d) %s' % (key, line),
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select_item))
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tokens.append((T, '\n'))
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# prepare the select choices
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for i, choice in enumerate(self.choices):
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_append(i, choice)
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tokens.append((T, ' Answer: %d' % self.choices[self.pointer_index][0]))
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return tokens
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def get_selected_value(self):
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# get value not label
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return self.choices[self.pointer_index][2]
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def question(message, **kwargs):
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# TODO extract common parts for list, checkbox, rawlist, expand
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if not 'choices' in kwargs:
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raise PromptParameterException('choices')
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# this does not implement default, use checked...
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# TODO
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#if 'default' in kwargs:
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# raise ValueError('rawlist does not implement \'default\' '
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# 'use \'checked\':True\' in choice!')
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qmark = kwargs.pop('qmark', '?')
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choices = kwargs.pop('choices', None)
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if len(choices) > 9:
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raise ValueError('rawlist supports only a maximum of 9 choices!')
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# TODO style defaults on detail level
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style = kwargs.pop('style', default_style)
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ic = InquirerControl(choices)
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def get_prompt_tokens(cli):
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tokens = []
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T = Token
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tokens.append((T.QuestionMark, qmark))
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tokens.append((T.Question, ' %s ' % message))
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if ic.answered:
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tokens.append((T.Answer, ' %s' % ic.get_selected_value()))
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return tokens
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# assemble layout
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layout = HSplit([
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Window(height=D.exact(1),
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content=TokenListControl(get_prompt_tokens)
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),
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ConditionalContainer(
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Window(ic),
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filter=~IsDone()
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)
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])
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# key bindings
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manager = KeyBindingManager.for_prompt()
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@manager.registry.add_binding(Keys.ControlQ, eager=True)
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@manager.registry.add_binding(Keys.ControlC, eager=True)
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def _(event):
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raise KeyboardInterrupt()
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# add key bindings for choices
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for i, c in enumerate(ic.choices):
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if not isinstance(c, Separator):
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def _reg_binding(i, keys):
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# trick out late evaluation with a "function factory":
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# http://stackoverflow.com/questions/3431676/creating-functions-in-a-loop
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@manager.registry.add_binding(keys, eager=True)
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def select_choice(event):
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ic.pointer_index = i
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_reg_binding(i, '%d' % c[0])
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@manager.registry.add_binding(Keys.Enter, eager=True)
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def set_answer(event):
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ic.answered = True
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event.cli.set_return_value(ic.get_selected_value())
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return Application(
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layout=layout,
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key_bindings_registry=manager.registry,
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mouse_support=True,
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style=style
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)
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