Added loading dialog when opening submissions.
This commit is contained in:
Michael Lazar
@@ -1,248 +0,0 @@
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import textwrap
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import curses
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import praw
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import utils
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class OOBError(Exception):
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pass
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class SubmissionDisplay(object):
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DEFAULT_REPLY_COLORS = [
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curses.COLOR_MAGENTA,
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curses.COLOR_GREEN,
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curses.COLOR_CYAN,
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curses.COLOR_YELLOW,
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]
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def __init__(
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self,
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stdscr,
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max_indent_level=5,
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indent_size=1,
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reply_colors=None,
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):
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self.stdscr = stdscr
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self.line = 0
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self._max_indent_level = max_indent_level
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self._indent_size = indent_size
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self._reply_colors = (reply_colors if reply_colors is not None
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else self.DEFAULT_REPLY_COLORS)
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@staticmethod
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def clean(unicode_string):
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"Convert unicode string into ascii-safe characters."
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return unicode_string.encode('ascii', 'replace').replace('\\', '')
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def _get_reply_color(self, nested_level):
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return self._reply_colors[nested_level % len(self._reply_colors)]
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def _draw_post(self, submission):
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"Draw the sumbission author's post"
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n_rows, n_cols = self.stdscr.getmaxyx()
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n_cols -= 1
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title = textwrap.wrap(self.clean(submission.title), n_cols-1)
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indents = {'initial_indent':' ', 'subsequent_indent':' '}
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text = textwrap.wrap(self.clean(submission.selftext), n_cols-1, **indents)
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url = ([self.clean(submission.url)] if
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getattr(submission, 'url') else [])
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required_rows = 4 + len(text) + len(url) + len(title)
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if self.line + required_rows > n_rows:
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raise OOBError()
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win = self.stdscr.derwin(required_rows, n_cols, self.line, 0)
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submission.window = win
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win_y = 0
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self.line += required_rows
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win.hline(win_y, 0, curses.ACS_HLINE, n_cols)
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win_y += 1
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# Submission title
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color_attr = curses.color_pair(curses.COLOR_CYAN)
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win.addstr(win_y, 0, '\n'.join(title), color_attr|curses.A_BOLD)
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win_y += len(title)
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# Author / Date / Subreddit
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author = (self.clean(submission.author.name) if
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getattr(submission, 'author') else '[deleted]')
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date = utils.humanize_timestamp(submission.created_utc)
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subreddit = self.clean(submission.subreddit.url)
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color_attr = curses.color_pair(curses.COLOR_GREEN)
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win.addstr(win_y, 0, author, curses.A_UNDERLINE|color_attr)
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win.addstr(' {} {}'.format(date, subreddit), curses.A_BOLD)
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win_y += 1
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if url:
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color_attr = curses.color_pair(curses.COLOR_MAGENTA)
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win.addstr(win_y, 0, url[0], curses.A_BOLD|color_attr)
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win_y += len(url)
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if text:
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win.addstr(win_y + len(url), 0, '\n'.join(text))
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win_y += len(text)
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# Score / Comments
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score = submission.score
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num_comments = submission.num_comments
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info = '{} points {} comments'.format(score, num_comments)
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win.addstr(win_y, 0, info, curses.A_BOLD)
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win_y += 1
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win.hline(win_y, 0, curses.ACS_HLINE, n_cols)
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def _draw_more_comments(self, comment):
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"Indicate that more comments can be loaded"
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n_rows, n_cols = self.stdscr.getmaxyx()
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n_cols -= 1
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required_rows = 2
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if self.line + required_rows > n_rows:
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raise OOBError()
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# Determine the indent level of the comment
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indent_level = min(self._max_indent_level, comment.nested_level)
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indent = indent_level * self._indent_size
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n_cols -= indent
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win = self.stdscr.derwin(required_rows, n_cols, self.line, indent)
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comment.window = win
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self.line += required_rows
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win.addnstr(0, indent, '[+] More comments', curses.A_BOLD)
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def _draw_comment(self, comment):
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"Draw a single comment"
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n_rows, n_cols = self.stdscr.getmaxyx()
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n_cols -= 1
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# Determine the indent level of the comment
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indent_level = min(self._max_indent_level, comment.nested_level)
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indent = indent_level * self._indent_size
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n_cols -= indent
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indents = {'initial_indent':' ', 'subsequent_indent':' '}
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text = textwrap.wrap(self.clean(comment.body), n_cols-1, **indents)
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required_rows = 2 + len(text)
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if self.line + required_rows > n_rows:
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raise OOBError()
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win = self.stdscr.derwin(required_rows, n_cols, self.line, indent)
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comment.window = win
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self.line += required_rows
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# Author / Score / Date
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author = (self.clean(comment.author.name) if
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getattr(comment, 'author') else '[deleted]')
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date = utils.humanize_timestamp(comment.created_utc)
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score = submission.score
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color_attr = (curses.color_pair(curses.COLOR_GREEN) if comment.is_author
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else curses.color_pair(curses.COLOR_BLUE))
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win.addstr(0, 1, author, curses.A_UNDERLINE|color_attr)
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win.addstr(' {} points {}'.format(score, date), curses.A_BOLD)
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# Body
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win.addstr(1, 0, '\n'.join(text))
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# Vertical line, unfortunately vline() doesn't support custom color so
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# we have to build it one chr at a time.
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reply_color = self._get_reply_color(comment.nested_level)
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color_attr = curses.color_pair(reply_color)
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for y in xrange(required_rows-1):
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win.addch(y, 0, curses.ACS_VLINE, color_attr)
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def _draw_url(self, submission):
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"Draw the submission url"
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n_rows, n_cols = self.stdscr.getmaxyx()
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color_attr = curses.color_pair(curses.COLOR_RED)
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url = self.clean(submission.permalink)
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self.stdscr.addnstr(self.line, 0, url, n_cols-1, color_attr|curses.A_STANDOUT)
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self.line += 1
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return True
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def draw_page(self, submission, comments, index=-1):
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"""
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Draw the comments page starting at the given index.
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"""
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# Initialize screen
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self.stdscr.erase()
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self.line = 0
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# URL is always drawn
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self._draw_url(submission)
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if index == -1:
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self._draw_post(submission)
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index += 1
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for comment in comments[index:]:
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try:
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if isinstance(comment, praw.objects.MoreComments):
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self._draw_more_comments(comment)
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else:
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comment.is_author = (comment.author == submission.author)
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self._draw_comment(comment)
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except OOBError:
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break
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self.stdscr.refresh()
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class SubmissionController(object):
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def __init__(self, display):
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self.display = display
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self._index = -1
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self._cursor = 0
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def loop(self, submission, comments):
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self.display.draw_page(submission, comments, self._index)
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while True:
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key = self.display.stdscr.getch()
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if key == curses.KEY_DOWN:
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self._index += 1
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elif key == curses.KEY_UP and self._index > -1:
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self._index -= 1
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elif key == curses.KEY_RESIZE:
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pass
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else:
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continue
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self.display.draw_page(submission, comments, self._index)
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if __name__ == '__main__':
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r = praw.Reddit(user_agent='reddit terminal viewer (rtv) v0.0')
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r.config.decode_html_entities = True
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submissions = r.get_subreddit('all').get_hot(limit=5)
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submission = submissions.next()
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comments = utils.flatten_tree(submission.comments)
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with utils.curses_session() as stdscr:
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display = SubmissionDisplay(stdscr)
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controller = SubmissionController(display)
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controller.loop(submission, comments)
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