[WIP] random text segments

test/fixtures/page_generation/page.py

@@ -1,5 +1,6 @@
 import random
 import textwrap
+from functools import lru_cache
 from typing import Tuple, Union, Iterable, List
 
 import albumentations as A
@@ -69,7 +70,7 @@ Image_t = Union[Image.Image, np.ndarray]
 #     ],
 #     p=0.5,
 # )
-from funcy import juxt, compose, identity, lflatten, lmap, first, iterate, take, last
+from funcy import juxt, compose, identity, lflatten, lmap, first, iterate, take, last, rest
 
 from cv_analysis.locations import TEST_PAGE_TEXTURES_DIR
 
@@ -368,16 +369,16 @@ class RandomTextBlock(ContentRectangle):
         self.content = image
 
     def f(self, last_full, lines):
+        @lru_cache(maxsize=None)
+        def truncate():
+            return random.random() < self.blank_line_percentage and last_full
 
-        line = lines[0]
+        line_processor = self.truncate_line if truncate() else identity
+        append = star(rconj)
 
-        if random.random() < self.blank_line_percentage and last_full:
-            line = self.truncate_line(line)
-            last_full = False
-        else:
-            last_full = True
+        fn = compose(append, juxt(rest, compose(line_processor, first)))
 
-        return last_full, [*lines[1:], line]
+        return (False, fn(lines)) if truncate() else (True, fn(lines))
 
     def format_line(self, line, full=True):
         line = self.truncate_line(line) if not full else line
@@ -390,6 +391,10 @@ class RandomTextBlock(ContentRectangle):
         return line
 
 
+def rconj(xs, x):
+    return [*xs, x]
+
+
 def generate_random_text_block(rectangle: Rectangle) -> ContentRectangle:
     block = RandomTextBlock(*rectangle.coords)
     block.generate_random_text(rectangle)