src/librarian/covers/widgets/title.py

   1 import PIL.ImageFont
   2 from librarian import get_resource
   3 from librarian.cover import Metric
   4 from ..utils.textbox import TextBox, split_words
   5 from .base import Widget
   6
   7
   8 class TitleBox(Widget):
   9     font_size = 159 # 45pt
  10     leading = 176  # 50pt
  11     tracking = 2.385
  12
  13     def __init__(self, cover, width, height, lines, scale=1):
  14         self.width = width
  15         self.height = height
  16         self.lines = lines
  17         self.m = Metric(self, cover.m._scale * scale)
  18         super().__init__(cover)
  19
  20     def setup(self):
  21         title_font = PIL.ImageFont.truetype(
  22             get_resource('fonts/SourceSans3VF-Roman.ttf'),
  23             self.m.font_size,
  24             layout_engine=PIL.ImageFont.LAYOUT_BASIC
  25         )
  26         title_font.set_variation_by_axes([800])
  27
  28         lines = self.lines or (int(self.height * (176/200) / self.m.leading) - 0)
  29
  30         self.tb = TextBox(
  31             self.width,
  32             self.height,
  33             split_words(self.cover.title),
  34             title_font,
  35             lines,
  36             self.m.leading,
  37             self.m.tracking,
  38             .5, .5
  39         )
  40         self.margin_top = self.tb.margin_top
  41
  42     def build(self, w, h):
  43         return self.tb.as_pil_image(self.cover.color_scheme['text'])
  44