git.scottworley.com Git - paperdoorknob/blob - glowfic.py

   1 # paperdoorknob: Print glowfic
   2 #
   3 # This program is free software: you can redistribute it and/or modify it
   4 # under the terms of the GNU General Public License as published by the
   5 # Free Software Foundation, version 3.
   6
   7
   8 from abc import ABC, abstractmethod
   9 from dataclasses import dataclass
  10 import itertools
  11 from urllib.parse import parse_qsl, urlencode, urlparse, urlunparse
  12
  13 from typing import Iterable
  14
  15 from bs4 import BeautifulSoup
  16 from bs4.element import Tag
  17
  18 from images import ImageStore
  19 from texify import Texifier
  20
  21
  22 def _removeViewFromURL(url: str) -> str:
  23     u = urlparse(url)
  24     old_qs = parse_qsl(u.query)
  25     new_qs = [(k, v) for k, v in old_qs if k != 'view']
  26     return urlunparse(u._replace(query=urlencode(new_qs)))
  27
  28
  29 def nonFlatURL(url: str) -> str:
  30     return _removeViewFromURL(url)
  31
  32
  33 def flatURL(url: str) -> str:
  34     u = urlparse(_removeViewFromURL(url))
  35     qs = parse_qsl(u.query) + [('view', 'flat')]
  36     return urlunparse(u._replace(query=urlencode(qs)))
  37
  38
  39 @dataclass(frozen=True)
  40 class Chunk:
  41     icon: str | None
  42     character: Tag | None
  43     screen_name: Tag | None
  44     author: Tag | None
  45     content: Tag
  46
  47 # We avoid the name "post" because the Glowfic community uses the term
  48 # inconsistently:
  49 #  * The Glowfic software sometimes uses "post" to refer to a whole thread
  50 #    (in the URL), sometimes uses "post" to refer to chunks (in the CSS),
  51 #    but mostly uses "post" to refer to just the first chunk in a thread
  52 #    (in the HTML and UI).  The non-first chunks are "replies".
  53 #  * Readers and this software don't need to distinguish first-chunks and
  54 #    non-first-chunks.
  55 #  * Humans in the community tend to use "posts" to mean chunks.
  56
  57
  58 def chunkDOMs(html: BeautifulSoup) -> Iterable[Tag]:
  59     def text() -> Tag:
  60         body = html.body
  61         assert body
  62         text = body.find_next("div", class_="post-post")
  63         assert isinstance(text, Tag)
  64         return text
  65
  66     def the_replies() -> Iterable[Tag]:
  67         rs = html.find_all("div", class_="post-reply")
  68         assert all(isinstance(r, Tag) for r in rs)
  69         return rs
  70
  71     return itertools.chain([text()], the_replies())
  72
  73
  74 def makeChunk(chunk_dom: Tag, image_store: ImageStore) -> Chunk:
  75
  76     def getIcon() -> str | None:
  77         icon_div = chunk_dom.findChild('div', class_='post-icon')
  78         if icon_div is None:
  79             return None
  80         assert isinstance(icon_div, Tag)
  81         icon_img = icon_div.findChild('img')
  82         if icon_img is None:
  83             return None
  84         assert isinstance(icon_img, Tag)
  85         return image_store.get_image(icon_img.attrs['src'])
  86
  87     def getByClass(css_class: str) -> Tag | None:
  88         tag = chunk_dom.findChild('div', class_=css_class)
  89         assert tag is None or isinstance(tag, Tag)
  90         return tag
  91
  92     content = chunk_dom.findChild('div', class_='post-content')
  93     assert isinstance(content, Tag)
  94
  95     return Chunk(getIcon(),
  96                  getByClass('post-character'),
  97                  getByClass('post-screenname'),
  98                  getByClass('post-author'),
  99                  content)
 100
 101
 102 def renderIcon(icon_path: str | None, image_size: float) -> str | None:
 103     params = f'width={image_size}mm,height={image_size}mm,keepaspectratio'
 104     return f'\\includegraphics[{params}]{{{icon_path}}}' if icon_path else None
 105
 106
 107 class Layout(ABC):
 108
 109     @abstractmethod
 110     def renderChunk(self, chunk: Chunk) -> bytes:
 111         raise NotImplementedError()
 112
 113
 114 class ContentOnlyLayout(Layout):
 115
 116     def __init__(self, texifier: Texifier) -> None:
 117         self._texifier = texifier
 118
 119     def renderChunk(self, chunk: Chunk) -> bytes:
 120         return self._texifier.texify(chunk.content) + b'\n'
 121
 122
 123 class BelowIconLayout(Layout):
 124
 125     def __init__(self, texifier: Texifier, image_size: float) -> None:
 126         self._texifier = texifier
 127         self._image_size = image_size
 128
 129     def renderChunk(self, chunk: Chunk) -> bytes:
 130         icon = renderIcon(chunk.icon, self._image_size)
 131         meta = [icon.encode('UTF-8')] if icon else []
 132         meta += [self._texifier.texify(x)
 133                  for x in [chunk.character, chunk.screen_name, chunk.author]
 134                  if x is not None]
 135
 136         return b'''\\wrapstuffclear
 137 \\begin{wrapstuff}[l]
 138 \\fbox{
 139 \\begin{varwidth}{0.5\\textwidth}
 140   \\smash{\\parbox[t][0pt]{0pt}{
 141     \\setlength{\\fboxrule}{0.2pt}
 142     \\setlength{\\fboxsep}{0pt}
 143     \\vspace{-3.4pt}
 144     \\fbox{\\hspace{107mm}}
 145   }\\\\*}
 146   \\vspace{-1em}
 147 \\begin{center}
 148 %s
 149 \\end{center}
 150 \\end{varwidth}
 151 }
 152 \\end{wrapstuff}
 153
 154 \\strut
 155
 156 \\noindent %s
 157 ''' % (
 158             b'\\\\*'.join(meta),
 159             self._texifier.texify(chunk.content))
 160
 161
 162 class BesideIconLayout(Layout):
 163
 164     def __init__(self, texifier: Texifier, image_size: float) -> None:
 165         self._texifier = texifier
 166         self._image_size = image_size
 167
 168     def renderChunk(self, chunk: Chunk) -> bytes:
 169         icon = renderIcon(chunk.icon, self._image_size)
 170         meta = [
 171             chunk.character,
 172             chunk.screen_name,
 173             chunk.author,
 174         ]
 175
 176         # Why is \textwidth not the width of the text?
 177         # Why is the width of the text .765\textwidth?
 178         return b'''\\noindent\\fbox{
 179 %s
 180 \\parbox[b]{.765\\textwidth}{
 181 \\begin{center}
 182 %s
 183 \\end{center}
 184 }
 185 }\\\\*
 186 \\vspace{-0.75em}\\\\*
 187 \\noindent %s
 188
 189 \\strut
 190
 191 ''' % (
 192             icon.encode('UTF-8') if icon else b'',
 193             b'\\\\*'.join(self._texifier.texify(x) for x in meta if x is not None),
 194             self._texifier.texify(chunk.content))