librarian/styles/wolnelektury/cover.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
   4 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   5 #
   6 from PIL import Image, ImageFont, ImageDraw
   7 from StringIO import StringIO
   8 from librarian import get_resource, URLOpener
   9 from librarian.cover import Cover, TextBox
  10
  11
  12 class WLCover(Cover):
  13     """Default Wolne Lektury cover generator."""
  14     width = 600
  15     height = 833
  16     uses_dc_cover = True
  17     author_font = ImageFont.truetype(
  18         get_resource('fonts/JunicodeWL-Regular.ttf'), 20)
  19     author_lineskip = 30
  20     title_font = ImageFont.truetype(
  21         get_resource('fonts/DejaVuSerif-Bold.ttf'), 30)
  22     title_lineskip = 40
  23     title_box_width = 350
  24     bar_width = 35
  25     background_color = '#444'
  26     author_color = '#444'
  27     default_background = get_resource('res/cover.png')
  28     format = 'JPEG'
  29
  30     epoch_colors = {
  31         u'Starożytność': '#9e3610',
  32         u'Średniowiecze': '#564c09',
  33         u'Renesans': '#8ca629',
  34         u'Barok': '#a6820a',
  35         u'Oświecenie': '#f2802e',
  36         u'Romantyzm': '#db4b16',
  37         u'Pozytywizm': '#961060',
  38         u'Modernizm': '#7784e0',
  39         u'Dwudziestolecie międzywojenne': '#3044cf',
  40         u'Współczesność': '#06393d',
  41     }
  42
  43     def __init__(self, book_info, format=None, image_cache=None):
  44         super(WLCover, self).__init__(book_info, format=format)
  45         self.kind = book_info.kind
  46         self.epoch = book_info.epoch
  47         if book_info.cover_url:
  48             url = book_info.cover_url
  49             bg_src = None
  50             if image_cache:
  51                 from urllib import quote
  52                 try:
  53                     bg_src = URLOpener().open(image_cache + quote(url, safe=""))
  54                 except:
  55                     pass
  56             if bg_src is None:
  57                 bg_src = URLOpener().open(url)
  58             self.background_img = StringIO(bg_src.read())
  59             bg_src.close()
  60         else:
  61             self.background_img = self.default_background
  62
  63     def pretty_author(self):
  64         return self.author.upper()
  65
  66     def image(self):
  67         img = Image.new('RGB', (self.width, self.height), self.background_color)
  68         draw = ImageDraw.Draw(img)
  69
  70         if self.epoch in self.epoch_colors:
  71             epoch_color = self.epoch_colors[self.epoch]
  72         else:
  73             epoch_color = '#000'
  74         draw.rectangle((0, 0, self.bar_width, self.height), fill=epoch_color)
  75
  76         if self.background_img:
  77             src = Image.open(self.background_img)
  78             trg_size = (self.width - self.bar_width, self.height)
  79             if src.size[0] * trg_size[1] < src.size[1] * trg_size[0]:
  80                 resized = (
  81                     trg_size[0],
  82                     src.size[1] * trg_size[0] / src.size[0]
  83                 )
  84                 cut = (resized[1] - trg_size[1]) / 2
  85                 src = src.resize(resized)
  86                 src = src.crop((0, cut, src.size[0], src.size[1] - cut))
  87             else:
  88                 resized = (
  89                     src.size[0] * trg_size[1] / src.size[1],
  90                     trg_size[1],
  91                 )
  92                 cut = (resized[0] - trg_size[0]) / 2
  93                 src = src.resize(resized)
  94                 src = src.crop((cut, 0, src.size[0] - cut, src.size[1]))
  95
  96             img.paste(src, (self.bar_width, 0))
  97             del src
  98
  99         box = TextBox(self.title_box_width, self.height, padding_y=20)
 100         box.text(self.pretty_author(),
 101                  font=self.author_font,
 102                  line_height=self.author_lineskip,
 103                  color=self.author_color,
 104                  shadow_color=self.author_shadow,
 105                 )
 106
 107         box.skip(10)
 108         box.draw.line((75, box.height, 275, box.height),
 109                 fill=self.author_color, width=2)
 110         box.skip(15)
 111
 112         box.text(self.pretty_title(),
 113                  line_height=self.title_lineskip,
 114                  font=self.title_font,
 115                  color=epoch_color,
 116                  shadow_color=self.title_shadow,
 117                 )
 118         box_img = box.image()
 119
 120         if self.kind == 'Liryka':
 121             # top
 122             box_top = 100
 123         elif self.kind == 'Epika':
 124             # bottom
 125             box_top = self.height - 100 - box_img.size[1]
 126         else:
 127             # center
 128             box_top = (self.height - box_img.size[1]) / 2
 129
 130         box_left = self.bar_width + (self.width - self.bar_width -
 131                         box_img.size[0]) / 2
 132         draw.rectangle((box_left, box_top,
 133             box_left + box_img.size[0], box_top + box_img.size[1]),
 134             fill='#fff')
 135         img.paste(box_img, (box_left, box_top), box_img)
 136
 137         return img