Implemented multiline functionality

mkimage.py

@@ -8,6 +8,7 @@
 import sys
 import logging
 import configparser
+import textwrap
 import argparse
 from PIL import Image, ImageFont, ImageDraw
 
@@ -130,21 +131,6 @@ def add_watermark(image, watermarkstring):
 def centered(textstring, font_spec):
     """Return coordinates for a centered string."""
 
-    # would also be good to have a function for multiline text:
-    # calculate width of text
-    # if too wide, split by whitespace
-    # compare width of canvas and string and determine how many lines we need
-    # split list of words into that many equal parts and join them
-    # get length of each line for centering
-    # determine lineskip
-    # return result
-    #
-    # or try and do that using multiline:
-    # https://pillow.readthedocs.io/en/3.3.x/reference/ImageDraw.html?highlight=multiline_text#PIL.ImageDraw.PIL.ImageDraw.Draw.multiline_text
-    # https://github.com/python-pillow/Pillow/issues/2067
-    # https://docs.python.org/3.3/library/textwrap.html?highlight=textwrap#module-textwrap
-
-
     tmp_draw = ImageDraw.Draw(Image.new("RGB", DIMENSIONS, BACKGROUND))
 
     string_width, string_height = tmp_draw.textsize(textstring, font=font_spec)
@@ -170,7 +156,7 @@ def create_cover(metadata_dict, image_directory, cover_filename):
     if metadata_dict['eoa_series'].lower() == "sources":
         press_text = "Edition Open Sources"
     else:
-        press_text = "Max Planck Research Library for the\nHistory and Development of Knowledge"
+        press_text = "Max Planck Research Library for the History and Development of Knowledge"
 
     if metadata_dict['eoa_series'].lower() == "textbooks":
         fill_colour_top = (0, 0, 0)
@@ -183,11 +169,18 @@ def create_cover(metadata_dict, image_directory, cover_filename):
 
     text_draw = ImageDraw.Draw(img)
 
+    # these will eventually also become candidates for multilines
     text_draw.text((centered(title_text, big_bold_font), 200), title_text, font=big_bold_font, fill=fill_colour_top)
     text_draw.text((centered(subtitle_text, medium_font), 350), subtitle_text, font=medium_font, fill=fill_colour_top)
     text_draw.text((centered(authors_text, small_font), int(DIMENSIONS[1]/3)-200), authors_text, font=small_font, fill=fill_colour_top)
-    text_draw.text((centered(press_text, small_font), DIMENSIONS[1]-400), press_text, font=small_font)
-    text_draw.text((centered(series_number_text, small_font), DIMENSIONS[1]-200), series_number_text, font=small_font)
+
+    press_text_lines = textwrap.wrap(press_text, width=40)
+    press_text_lines.append(series_number_text)
+
+    press_text_joined = "\n".join(press_text_lines)
+    ptcenter = centered(press_text_joined, small_font)
+
+    text_draw.multiline_text((ptcenter,DIMENSIONS[1]-400), press_text_joined, font=small_font, align="center")
 
     image_on_cover = Image.open(os.path.join(image_directory, get_cover_image(image_directory)))