534 lines
17 KiB
Python
534 lines
17 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import os
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import sys
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import six
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import time
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import curses
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from functools import wraps
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from kitchen.text.display import textual_width
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from . import docs
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from .objects import Controller, Color, Command
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from .exceptions import TemporaryFileError
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from .__version__ import __version__
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def logged_in(f):
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"""
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Decorator for Page methods that require the user to be authenticated.
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"""
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@wraps(f)
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def wrapped_method(self, *args, **kwargs):
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if not self.reddit.is_oauth_session():
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self.term.show_notification('Not logged in')
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return
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return f(self, *args, **kwargs)
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return wrapped_method
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class PageController(Controller):
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character_map = {}
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class Page(object):
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FOOTER = None
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def __init__(self, reddit, term, config, oauth):
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self.reddit = reddit
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self.term = term
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self.config = config
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self.oauth = oauth
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self.content = None
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self.nav = None
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self.controller = None
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self.active = True
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self._row = 0
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self._subwindows = None
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def refresh_content(self, order=None, name=None):
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raise NotImplementedError
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def _draw_item(self, window, data, inverted):
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raise NotImplementedError
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def get_selected_item(self):
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return self.content.get(self.nav.absolute_index)
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def loop(self):
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"""
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Main control loop runs the following steps:
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1. Re-draw the screen
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2. Wait for user to press a key (includes terminal resizing)
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3. Trigger the method registered to the input key
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The loop will run until self.active is set to False from within one of
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the methods.
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"""
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self.active = True
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while self.active:
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self.draw()
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ch = self.term.stdscr.getch()
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self.controller.trigger(ch)
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@PageController.register(Command('EXIT'))
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def exit(self):
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if self.term.prompt_y_or_n('Do you really want to quit? (y/n): '):
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sys.exit()
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@PageController.register(Command('FORCE_EXIT'))
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def force_exit(self):
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sys.exit()
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@PageController.register(Command('HELP'))
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def show_help(self):
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self.term.open_pager(docs.HELP.strip())
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@PageController.register(Command('SORT_HOT'))
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def sort_content_hot(self):
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self.refresh_content(order='hot')
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@PageController.register(Command('SORT_TOP'))
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def sort_content_top(self):
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choices = {
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'\n': 'top',
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'1': 'top-hour',
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'2': 'top-day',
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'3': 'top-week',
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'4': 'top-month',
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'5': 'top-year',
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'6': 'top-all'}
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message = docs.TIME_ORDER_MENU.strip().splitlines()
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ch = self.term.show_notification(message)
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ch = six.unichr(ch)
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if ch not in choices:
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self.term.show_notification('Invalid option')
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return
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self.refresh_content(order=choices[ch])
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@PageController.register(Command('SORT_RISING'))
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def sort_content_rising(self):
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self.refresh_content(order='rising')
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@PageController.register(Command('SORT_NEW'))
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def sort_content_new(self):
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self.refresh_content(order='new')
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@PageController.register(Command('SORT_CONTROVERSIAL'))
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def sort_content_controversial(self):
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choices = {
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'\n': 'controversial',
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'1': 'controversial-hour',
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'2': 'controversial-day',
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'3': 'controversial-week',
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'4': 'controversial-month',
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'5': 'controversial-year',
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'6': 'controversial-all'}
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message = docs.TIME_ORDER_MENU.strip().splitlines()
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ch = self.term.show_notification(message)
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ch = six.unichr(ch)
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if ch not in choices:
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self.term.show_notification('Invalid option')
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return
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self.refresh_content(order=choices[ch])
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@PageController.register(Command('MOVE_UP'))
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def move_cursor_up(self):
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self._move_cursor(-1)
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self.clear_input_queue()
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@PageController.register(Command('MOVE_DOWN'))
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def move_cursor_down(self):
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self._move_cursor(1)
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self.clear_input_queue()
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@PageController.register(Command('PAGE_UP'))
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def move_page_up(self):
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self._move_page(-1)
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self.clear_input_queue()
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@PageController.register(Command('PAGE_DOWN'))
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def move_page_down(self):
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self._move_page(1)
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self.clear_input_queue()
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@PageController.register(Command('PAGE_TOP'))
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def move_page_top(self):
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self._remove_cursor()
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self.nav.page_index = self.content.range[0]
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self.nav.cursor_index = 0
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self.nav.inverted = False
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self._add_cursor()
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@PageController.register(Command('PAGE_BOTTOM'))
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def move_page_bottom(self):
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self._remove_cursor()
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self.nav.page_index = self.content.range[1]
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self.nav.cursor_index = 0
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self.nav.inverted = True
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self._add_cursor()
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@PageController.register(Command('UPVOTE'))
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@logged_in
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def upvote(self):
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data = self.get_selected_item()
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if 'likes' not in data:
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self.term.flash()
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elif data['likes']:
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with self.term.loader('Clearing vote'):
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data['object'].clear_vote()
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if not self.term.loader.exception:
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data['likes'] = None
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else:
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with self.term.loader('Voting'):
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data['object'].upvote()
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if not self.term.loader.exception:
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data['likes'] = True
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@PageController.register(Command('DOWNVOTE'))
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@logged_in
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def downvote(self):
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data = self.get_selected_item()
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if 'likes' not in data:
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self.term.flash()
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elif data['likes'] or data['likes'] is None:
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with self.term.loader('Voting'):
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data['object'].downvote()
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if not self.term.loader.exception:
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data['likes'] = False
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else:
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with self.term.loader('Clearing vote'):
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data['object'].clear_vote()
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if not self.term.loader.exception:
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data['likes'] = None
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@PageController.register(Command('SAVE'))
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@logged_in
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def save(self):
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data = self.get_selected_item()
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if 'saved' not in data:
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self.term.flash()
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elif not data['saved']:
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with self.term.loader('Saving'):
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data['object'].save()
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if not self.term.loader.exception:
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data['saved'] = True
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else:
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with self.term.loader('Unsaving'):
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data['object'].unsave()
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if not self.term.loader.exception:
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data['saved'] = False
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@PageController.register(Command('LOGIN'))
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def login(self):
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"""
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Prompt to log into the user's account, or log out of the current
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account.
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"""
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if self.reddit.is_oauth_session():
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if self.term.prompt_y_or_n('Log out? (y/n): '):
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self.oauth.clear_oauth_data()
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self.term.show_notification('Logged out')
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else:
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self.oauth.authorize()
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@PageController.register(Command('DELETE'))
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@logged_in
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def delete_item(self):
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"""
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Delete a submission or comment.
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"""
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data = self.get_selected_item()
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if data.get('author') != self.reddit.user.name:
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self.term.flash()
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return
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prompt = 'Are you sure you want to delete this? (y/n): '
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if not self.term.prompt_y_or_n(prompt):
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self.term.show_notification('Canceled')
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return
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with self.term.loader('Deleting', delay=0):
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data['object'].delete()
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# Give reddit time to process the request
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time.sleep(2.0)
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if self.term.loader.exception is None:
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self.refresh_content()
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@PageController.register(Command('EDIT'))
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@logged_in
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def edit(self):
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"""
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Edit a submission or comment.
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"""
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data = self.get_selected_item()
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if data.get('author') != self.reddit.user.name:
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self.term.flash()
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return
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if data['type'] == 'Submission':
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subreddit = self.reddit.get_subreddit(self.content.name)
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content = data['text']
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info = docs.SUBMISSION_EDIT_FILE.format(
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content=content, name=subreddit)
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elif data['type'] == 'Comment':
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content = data['body']
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info = docs.COMMENT_EDIT_FILE.format(content=content)
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else:
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self.term.flash()
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return
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with self.term.open_editor(info) as text:
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if text == content:
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self.term.show_notification('Canceled')
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return
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with self.term.loader('Editing', delay=0):
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data['object'].edit(text)
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time.sleep(2.0)
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if self.term.loader.exception is None:
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self.refresh_content()
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else:
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raise TemporaryFileError()
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@PageController.register(Command('INBOX'))
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@logged_in
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def get_inbox(self):
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"""
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Checks the inbox for unread messages and displays a notification.
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"""
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inbox = len(list(self.reddit.get_unread(limit=1)))
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message = 'New Messages' if inbox > 0 else 'No New Messages'
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self.term.show_notification(message)
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def clear_input_queue(self):
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"""
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Clear excessive input caused by the scroll wheel or holding down a key
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"""
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with self.term.no_delay():
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while self.term.getch() != -1:
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continue
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def draw(self):
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n_rows, n_cols = self.term.stdscr.getmaxyx()
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if n_rows < self.term.MIN_HEIGHT or n_cols < self.term.MIN_WIDTH:
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# TODO: Will crash when you try to navigate if the terminal is too
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# small at startup because self._subwindows will never be populated
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return
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self._row = 0
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self._draw_header()
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self._draw_banner()
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self._draw_content()
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self._draw_footer()
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self._add_cursor()
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self.term.stdscr.touchwin()
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self.term.stdscr.refresh()
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def _draw_header(self):
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n_rows, n_cols = self.term.stdscr.getmaxyx()
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# Note: 2 argument form of derwin breaks PDcurses on Windows 7!
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window = self.term.stdscr.derwin(1, n_cols, self._row, 0)
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window.erase()
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# curses.bkgd expects bytes in py2 and unicode in py3
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ch, attr = str(' '), curses.A_REVERSE | curses.A_BOLD | Color.CYAN
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window.bkgd(ch, attr)
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sub_name = self.content.name
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sub_name = sub_name.replace('/r/front', 'Front Page')
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sub_name = sub_name.replace('/u/me', 'My Submissions')
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sub_name = sub_name.replace('/u/saved', 'My Saved Submissions')
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self.term.add_line(window, sub_name, 0, 0)
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# Set the terminal title
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if len(sub_name) > 50:
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title = sub_name.strip('/')
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title = title.rsplit('/', 1)[1]
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title = title.replace('_', ' ')
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else:
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title = sub_name
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if os.getenv('DISPLAY'):
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title += ' - rtv {0}'.format(__version__)
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title = self.term.clean(title)
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if six.PY3:
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# In py3 you can't write bytes to stdout
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title = title.decode('utf-8')
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title = '\x1b]2;{0}\x07'.format(title)
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else:
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title = b'\x1b]2;{0}\x07'.format(title)
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sys.stdout.write(title)
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sys.stdout.flush()
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if self.reddit.user is not None:
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# The starting position of the name depends on if we're converting
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# to ascii or not
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width = len if self.config['ascii'] else textual_width
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if self.config['hide_username']:
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username = "Logged in"
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else:
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username = self.reddit.user.name
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s_col = (n_cols - width(username) - 1)
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# Only print username if it fits in the empty space on the right
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if (s_col - 1) >= width(sub_name):
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self.term.add_line(window, username, 0, s_col)
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self._row += 1
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def _draw_banner(self):
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n_rows, n_cols = self.term.stdscr.getmaxyx()
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window = self.term.stdscr.derwin(1, n_cols, self._row, 0)
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window.erase()
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ch, attr = str(' '), curses.A_BOLD | Color.YELLOW
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window.bkgd(ch, attr)
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items = docs.BANNER.strip().split(' ')
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distance = (n_cols - sum(len(t) for t in items) - 1) / (len(items) - 1)
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spacing = max(1, int(distance)) * ' '
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text = spacing.join(items)
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self.term.add_line(window, text, 0, 0)
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if self.content.order is not None:
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order = self.content.order.split('-')[0]
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col = text.find(order) - 3
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window.chgat(0, col, 3, attr | curses.A_REVERSE)
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self._row += 1
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def _draw_content(self):
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"""
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Loop through submissions and fill up the content page.
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"""
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n_rows, n_cols = self.term.stdscr.getmaxyx()
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window = self.term.stdscr.derwin(
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n_rows - self._row - 1, n_cols, self._row, 0)
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window.erase()
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win_n_rows, win_n_cols = window.getmaxyx()
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self._subwindows = []
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page_index, cursor_index, inverted = self.nav.position
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step = self.nav.step
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# If not inverted, align the first submission with the top and draw
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# downwards. If inverted, align the first submission with the bottom
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# and draw upwards.
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cancel_inverted = True
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current_row = (win_n_rows - 1) if inverted else 0
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available_rows = win_n_rows
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top_item_height = None if inverted else self.nav.top_item_height
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for data in self.content.iterate(page_index, step, win_n_cols - 2):
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subwin_n_rows = min(available_rows, data['n_rows'])
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subwin_inverted = inverted
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if top_item_height is not None:
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# Special case: draw the page as non-inverted, except for the
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# top element. This element will be drawn as inverted with a
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# restricted height
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subwin_n_rows = min(subwin_n_rows, top_item_height)
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subwin_inverted = True
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top_item_height = None
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subwin_n_cols = win_n_cols - data['h_offset']
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start = current_row - subwin_n_rows + 1 if inverted else current_row
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subwindow = window.derwin(
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subwin_n_rows, subwin_n_cols, start, data['h_offset'])
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attr = self._draw_item(subwindow, data, subwin_inverted)
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self._subwindows.append((subwindow, attr))
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available_rows -= (subwin_n_rows + 1) # Add one for the blank line
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current_row += step * (subwin_n_rows + 1)
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if available_rows <= 0:
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# Indicate the page is full and we can keep the inverted screen.
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cancel_inverted = False
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break
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if len(self._subwindows) == 1:
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# Never draw inverted if only one subwindow. The top of the
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# subwindow should always be aligned with the top of the screen.
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cancel_inverted = True
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if cancel_inverted and self.nav.inverted:
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# In some cases we need to make sure that the screen is NOT
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# inverted. Unfortunately, this currently means drawing the whole
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# page over again. Could not think of a better way to pre-determine
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# if the content will fill up the page, given that it is dependent
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# on the size of the terminal.
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self.nav.flip((len(self._subwindows) - 1))
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return self._draw_content()
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self._row += win_n_rows
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def _draw_footer(self):
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n_rows, n_cols = self.term.stdscr.getmaxyx()
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window = self.term.stdscr.derwin(1, n_cols, self._row, 0)
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window.erase()
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ch, attr = str(' '), curses.A_REVERSE | curses.A_BOLD | Color.CYAN
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window.bkgd(ch, attr)
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text = self.FOOTER.strip()
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self.term.add_line(window, text, 0, 0)
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self._row += 1
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def _add_cursor(self):
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self._edit_cursor(curses.A_REVERSE)
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def _remove_cursor(self):
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self._edit_cursor(curses.A_NORMAL)
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def _move_cursor(self, direction):
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self._remove_cursor()
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# Note: ACS_VLINE doesn't like changing the attribute, so disregard the
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# redraw flag and opt to always redraw
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valid, redraw = self.nav.move(direction, len(self._subwindows))
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if not valid:
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self.term.flash()
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self._add_cursor()
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def _move_page(self, direction):
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self._remove_cursor()
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valid, redraw = self.nav.move_page(direction, len(self._subwindows)-1)
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if not valid:
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self.term.flash()
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self._add_cursor()
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def _edit_cursor(self, attribute):
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# Don't allow the cursor to go below page index 0
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if self.nav.absolute_index < 0:
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return
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# Don't allow the cursor to go over the number of subwindows
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# This could happen if the window is resized and the cursor index is
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# pushed out of bounds
|
|
if self.nav.cursor_index >= len(self._subwindows):
|
|
self.nav.cursor_index = len(self._subwindows) - 1
|
|
|
|
window, attr = self._subwindows[self.nav.cursor_index]
|
|
if attr is not None:
|
|
attribute |= attr
|
|
|
|
n_rows, _ = window.getmaxyx()
|
|
for row in range(n_rows):
|
|
window.chgat(row, 0, 1, attribute)
|