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[paperdoorknob] / 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 def stripHREF(tag: Tag) -> None:
93 for c in tag.findChildren("a"):
94 if "href" in c.attrs:
95 del c.attrs["href"]
96
97 def getMeta(css_class: str) -> Tag | None:
98 tag = getByClass(css_class)
99 if tag is None:
100 return None
101 stripHREF(tag)
102 return tag
103
104 content = chunk_dom.findChild('div', class_='post-content')
105 assert isinstance(content, Tag)
106
107 return Chunk(getIcon(),
108 getMeta('post-character'),
109 getMeta('post-screenname'),
110 getMeta('post-author'),
111 content)
112
113
114 def renderIcon(icon_path: str | None) -> bytes | None:
115 if icon_path is None:
116 return None
117 return (
118 br'\includegraphics[width=\glowiconsize,height=\glowiconsize,keepaspectratio]{%s}' %
119 icon_path.encode('UTF-8'))
120
121
122 class Layout(ABC):
123
124 @abstractmethod
125 def renderChunk(self, chunk: Chunk) -> bytes:
126 raise NotImplementedError()
127
128
129 class ContentOnlyLayout(Layout):
130
131 def __init__(self, texifier: Texifier) -> None:
132 self._texifier = texifier
133
134 def renderChunk(self, chunk: Chunk) -> bytes:
135 return self._texifier.texify(chunk.content) + b'\n'
136
137
138 class BelowIconLayout(Layout):
139
140 def __init__(self, texifier: Texifier) -> None:
141 self._texifier = texifier
142
143 def renderChunk(self, chunk: Chunk) -> bytes:
144 icon = renderIcon(chunk.icon)
145 meta = [icon] if icon else []
146 meta += [self._texifier.texify(x)
147 for x in [chunk.character, chunk.screen_name, chunk.author]
148 if x is not None]
149
150 return br'''\wrapstuffclear
151 \begin{wrapstuff}[l]
152 \fbox{
153 \begin{varwidth}{0.5\textwidth}
154 \smash{\parbox[t][0pt]{0pt}{
155 \setlength{\fboxrule}{0.2pt}
156 \setlength{\fboxsep}{0pt}
157 \vspace{-3.4pt}
158 \fbox{\hspace{107mm}}
159 }\\*}
160 \vspace{-1em}
161 \begin{center}
162 %s
163 \end{center}
164 \end{varwidth}
165 }
166 \end{wrapstuff}
167
168 \strut
169
170 \noindent %s
171 ''' % (
172 br'\\*'.join(meta),
173 self._texifier.texify(chunk.content))
174
175
176 class BesideIconLayout(Layout):
177
178 def __init__(self, texifier: Texifier) -> None:
179 self._texifier = texifier
180
181 def renderChunk(self, chunk: Chunk) -> bytes:
182 icon = renderIcon(chunk.icon)
183 meta = [
184 chunk.character,
185 chunk.screen_name,
186 chunk.author,
187 ]
188
189 # Why is \textwidth not the width of the text?
190 # Why is the width of the text .765\textwidth?
191 return br'''\noindent\fbox{
192 %s
193 \parbox[b]{.765\textwidth}{
194 \begin{center}
195 %s
196 \end{center}
197 }
198 }\\*
199 \vspace{-0.75em}\\*
200 \noindent %s
201
202 \strut
203
204 ''' % (
205 icon if icon else b'',
206 br'\\*'.join(self._texifier.texify(x) for x in meta if x is not None),
207 self._texifier.texify(chunk.content))