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# Copyright 2015 Canonical, Ltd. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as # published by the Free Software Foundation, either version 3 of the # License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """ Re-usable input widgets """ from functools import partial import logging import re from urwid import ( ACTIVATE, AttrWrap, connect_signal, Edit, Filler, IntEdit, LineBox, PopUpLauncher, SelectableIcon, Text, TOP, WidgetWrap, ) from subiquitycore.ui.buttons import PlainButton from subiquitycore.ui.container import Pile from subiquitycore.ui.utils import Color, Padding log = logging.getLogger("subiquitycore.ui.input") class StringEditor(Edit): """ Edit input class Attaches its result to the `value` accessor. """ @property def value(self): return self.get_edit_text() @value.setter # NOQA def value(self, value): self.set_edit_text(value) class PasswordEditor(StringEditor): """ Password input prompt with masking """ def __init__(self, mask="*"): super().__init__(mask=mask) class RestrictedEditor(StringEditor): """Editor that only allows certain characters.""" def __init__(self, allowed=None): super().__init__() self.matcher = re.compile(allowed) def valid_char(self, ch): return len(ch) == 1 and self.matcher.match(ch) is not None RealnameEditor = partial(RestrictedEditor, r'[a-zA-Z0-9_\- ]') EmailEditor = partial(RestrictedEditor, r'[-a-zA-Z0-9_.@+=]') class UsernameEditor(StringEditor): """ Username input prompt with input rules """ def keypress(self, size, key): ''' restrict what chars we allow for username ''' if self._command_map[key] is not None: return super().keypress(size, key) new_text = self.insert_text_result(key)[0] username = r'[a-z_][a-z0-9_-]*' # don't allow non username chars if new_text != "" and re.match(username, new_text) is None: return False return super().keypress(size, key) class IntegerEditor(WidgetWrap): """ IntEdit input class """ def __init__(self, default=0): self._edit = IntEdit(default=default) super().__init__(self._edit) @property def value(self): return self._edit.value() @value.setter def value(self, val): return self._edit.set_edit_text(str(val)) class _PopUpButton(SelectableIcon): """It looks a bit like a radio button, but it just emits 'click' on activation.""" signals = ['click'] states = { True: "(+) ", False: "( ) ", } def __init__(self, option, state): p = self.states[state] super().__init__(p + option, len(p)) def keypress(self, size, key): if self._command_map[key] != ACTIVATE: return key self._emit('click') class _PopUpSelectDialog(WidgetWrap): """A list of PopUpButtons with a box around them.""" def __init__(self, parent, cur_index): self.parent = parent group = [] for i, option in enumerate(self.parent._options): if option[1]: btn = _PopUpButton(option[0], state=i==cur_index) connect_signal(btn, 'click', self.click, i) group.append(AttrWrap(btn, 'menu_button', 'menu_button focus')) else: btn = Text(" " + option[0]) group.append(AttrWrap(btn, 'info_minor')) pile = Pile(group) pile.set_focus(group[cur_index]) fill = Filler(pile, valign=TOP) super().__init__(LineBox(fill)) def click(self, btn, index): self.parent.index = index self.parent.close_pop_up() def keypress(self, size, key): if key == 'esc': self.parent.close_pop_up() else: return super().keypress(size, key) class SelectorError(Exception): pass class Selector(PopUpLauncher): """A widget that allows the user to chose between options by popping up this list of options. (A bit like <select> in an HTML form). """ _prefix = "(+) " signals = ['select'] def __init__(self, opts, index=0): self._options = [] for opt in opts: if not isinstance(opt, tuple): if not isinstance(opt, str): raise SelectorError("invalid option %r", opt) opt = (opt, True, opt) elif len(opt) == 1: opt = (opt[0], True, opt[0]) elif len(opt) == 2: opt = (opt[0], opt[1], opt[0]) elif len(opt) != 3: raise SelectorError("invalid option %r", opt) self._options.append(opt) self._button = SelectableIcon(self._prefix, len(self._prefix)) self._set_index(index) super().__init__(self._button) def keypress(self, size, key): if self._command_map[key] != ACTIVATE: return key self.open_pop_up() def _set_index(self, val): self._button.set_text(self._prefix + self._options[val][0]) self._index = val @property def index(self): return self._index @index.setter def index(self, val): self._emit('select', self._options[val][2]) self._set_index(val) @property def value(self): return self._options[self._index][2] @value.setter def value(self, val): for i, (label, enabled, value) in enumerate(self._options): if value == val: self.index = i return raise AttributeError("cannot set value to %r", val) def create_pop_up(self): return _PopUpSelectDialog(self, self.index) def get_pop_up_parameters(self): width = max([len(o[0]) for o in self._options]) \ + len(self._prefix) + 3 # line on left, space, line on right return {'left':-1, 'top':-self.index-1, 'overlay_width':width, 'overlay_height':len(self._options) + 2} class YesNo(Selector): """ Yes/No selector """ def __init__(self): opts = ['Yes', 'No'] super().__init__(opts) class _HelpDisplay(WidgetWrap): def __init__(self, closer, help_text): self._closer = closer button = Color.button(PlainButton(label="Close", on_press=lambda btn:self._closer())) super().__init__(LineBox(Pile([Text(help_text), Padding.fixed_10(button)]), title="Help")) def keypress(self, size, key): if key == 'esc': self._closer() else: return super().keypress(size, key) class Help(WidgetWrap): def __init__(self, view, help_text): self._view = view self._help_text = help_text self._button = Padding.fixed_3(Color.button(SelectableIcon("[?]", 1))) super().__init__(self._button) def keypress(self, size, key): if self._command_map[key] != ACTIVATE: return key self._view.show_overlay(_HelpDisplay(self._view.remove_overlay, self._help_text))
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