feat: visualize list of FSWs

.github/workflows/lint.yaml

@@ -20,7 +20,7 @@ jobs:
           python-version: '3.8'
 
       - name: Install Requirements
-        run: pip install .[dev]
+        run: pip install .[dev,mouthing,server]
 
       - name: Lint Code
         run: pylint signwriting

.github/workflows/test.yaml

@@ -20,7 +20,7 @@ jobs:
           python-version: '3.8'
 
       - name: Install Requirements
-        run: pip install .[dev]
+        run: pip install .[dev,mouthing,server]
 
       - name: Test Code
         run: pytest signwriting

pyproject.toml

@@ -21,6 +21,11 @@ mouthing = [
     "epitran",
     "g2pk"
 ]
+server = [
+    # For API server
+    "flask",
+    "Flask-RESTful",
+]
 
 [tool.yapf]
 based_on_style = "google"
@@ -33,6 +38,8 @@ disable = [
     "C0114", # Missing module docstring
     "C0115", # Missing class docstring
     "C0116", # Missing function or method docstring
+    "C3001", # Lambda expression assigned to a variable
+    "R0917", # Too many positional arguments
 ]
 good-names = ["i", "f", "x", "y"]
 

signwriting/tokenizer/base_tokenizer.py

@@ -5,7 +5,7 @@
 
 class BaseTokenizer:
 
-    # pylint: disable=too-many-arguments,too-many-instance-attributes
+    # pylint: disable=too-many-arguments, too-many-instance-attributes
     def __init__(self,
                  tokens: List[str],
                  starting_index=None,

signwriting/utils/join_signs.py

@@ -1,4 +1,5 @@
 from collections import namedtuple
+from typing import List
 
 from signwriting.formats.fsw_to_sign import fsw_to_sign
 from signwriting.formats.sign_to_fsw import sign_to_fsw
@@ -59,7 +60,7 @@ def join_signs_horizontal(*fsws: str, spacing: int = 0):
 Point = namedtuple("Point", ["x", "y"])
 
 
-def sign_from_symbols(symbols: list[SignSymbol], fix_x=True, fix_y=True) -> Sign:
+def sign_from_symbols(symbols: List[SignSymbol], fix_x=True, fix_y=True) -> Sign:
     min_p = Point(x=999, y=999)
     max_p = Point(x=0, y=0)
     for symbol in symbols:

signwriting/visualizer/test_visualize.py

@@ -76,6 +76,14 @@ def test_image_with_fill_and_embedded_color(self):
                                      fill_color=(123,234,0,255))
         self.assert_image_equal_with_reference(fsw, image)
 
+    def test_layout_signwriting(self):
+        fsw_list = ["AS14c20S27106M518x529S14c20481x471S27106503x489",
+            "AS18701S1870aS2e734S20500M518x533S1870a489x515S18701482x490S20500508x496S2e734500x468"] # Hello World
+
+        for direction in ["horizontal", "vertical"]:
+            image = signwriting_to_image(fsw_list, direction=direction)
+            self.assert_image_equal_with_reference(direction, image)
+
 
 if __name__ == '__main__':
     unittest.main()

signwriting/visualizer/visualize.py

@@ -1,6 +1,6 @@
 from functools import lru_cache
 from pathlib import Path
-from typing import Tuple
+from typing import Tuple, List, Literal, Union
 
 from PIL import Image, ImageDraw, ImageFont
 
@@ -26,9 +26,17 @@ def get_symbol_size(symbol: str):
 
 
 # pylint: disable=too-many-locals, too-many-arguments
-def signwriting_to_image(fsw: str, antialiasing=True, trust_box=True, embedded_color=False,
+def signwriting_to_image(fsw: Union[str, List[str]], antialiasing=True, trust_box=True, embedded_color=False,
                          line_color: RGBA = (0, 0, 0, 255),
-                         fill_color: RGBA = (255, 255, 255, 255)) -> Image:
+                         fill_color: RGBA = (255, 255, 255, 255),
+                         direction: Literal["horizontal", "vertical"] = "horizontal") -> Image.Image:
+    if isinstance(fsw, list):
+        images = [
+            signwriting_to_image(fsw_string, antialiasing, trust_box, embedded_color, line_color, fill_color)
+            for fsw_string in fsw
+        ]
+        return layout_signwriting(images, direction)
+
     sign = fsw_to_sign(fsw)
     if len(sign['symbols']) == 0:
         return Image.new('RGBA', (1, 1), (0, 0, 0, 0))
@@ -65,3 +73,28 @@ def signwriting_to_image(fsw: str, antialiasing=True, trust_box=True, embedded_c
                   font=line_font, embedded_color=embedded_color)
 
     return img
+
+
+def layout_signwriting(images: List[Image.Image], direction: str) -> Image.Image:
+    GAP = 20
+
+    if direction == "horizontal":
+        max_height = max(img.height for img in images)
+        total_width = sum(img.width for img in images) + GAP * (len(images) - 1)
+        size = (total_width, max_height)
+        paste_position = lambda offset, img: (offset, (max_height - img.height) // 2)
+        offset_increment = lambda img: img.width + GAP
+    else:
+        max_width = max(img.width for img in images)
+        total_height = sum(img.height for img in images) + GAP * (len(images) - 1)
+        size = (max_width, total_height)
+        paste_position = lambda offset, img: ((max_width - img.width) // 2, offset)
+        offset_increment = lambda img: img.height + GAP
+
+    layout_image = Image.new("RGBA", size, (255, 255, 255, 0))
+    offset = 0
+    for img in images:
+        layout_image.paste(img, paste_position(offset, img))
+        offset += offset_increment(img)
+
+    return layout_image