feat: make FreeDesktop icon thumbnail size as configurable

src/assemblicon/highlevel/environment.py

@@ -7,13 +7,19 @@ from pathlib import Path
 from typing import TypeVar, Generic, Callable
 from ..lowlevel.environment import Prologue as LowPrologue, Environment as LowEnv
 from ..lowlevel.artrdr import SvgRenderKind
-from .utils import FdContext, WinCategory, MacCategory, FD_THUMBNAIL_HWS
+from .utils import FdContext, WinCategory, MacCategory, VART_HW
 
 
 @dataclass(frozen=True)
 class Prologue(LowPrologue):
     svg_render: SvgRenderKind
-    """The render kind for SVG"""
+    """The render kind for SVG."""
+    fd_thumbnail_hws: tuple[int, ...]
+    """
+    The collection of sizes of generated FreeDesktop icons.
+    Each size must be greater than zero and lower or equal to ``VART_HW``.
+    Due to icon is a square rectangle, the height and width are same.
+    """
     temp_dir_initializer: Callable[[Path], None] | None
     """
     The extra initializer for user temporary directory.
@@ -21,6 +27,15 @@ class Prologue(LowPrologue):
     ``None`` for no extra initializer.
     """
 
+    def __post_init__(self) -> None:
+        super().__post_init__()
+        for hw in self.fd_thumbnail_hws:
+            if hw <= 0 or hw > VART_HW:
+                raise ValueError(
+                    f"Given FreeDesktop icon thumbnail size mismatch the size requirements. "
+                    f"Expect >= 0 and <= {VART_HW}, got {hw}."
+                )
+
 
 _TEMP_USER_DIR: str = "user"
 _TEMP_LIB_DIR: str = "assemblicon"
@@ -52,7 +67,7 @@ class Environment(Generic[P]):
             parents=True, exist_ok=True
         )
         # and output directory
-        for hw in FD_THUMBNAIL_HWS:
+        for hw in self.__prologue.fd_thumbnail_hws:
             for kind in FdContext:
                 self.__output_artifact(f"{hw}x{hw}", str(kind)).mkdir(
                     parents=True, exist_ok=True

src/assemblicon/highlevel/sink/fdart_sink.py

@@ -2,7 +2,7 @@ from dataclasses import dataclass
 from .common import Sink
 from ..address import Address, AddressDomain
 from ..environment import Environment
-from ..utils import Artifact, FdContext, FD_THUMBNAIL_HWS, check_vart
+from ..utils import Artifact, FdContext, check_vart
 from ...lowlevel import artio, artrdr
 from ...logger import HIGHLEVEL_LOGGER as LOGGER
 
@@ -33,7 +33,8 @@ class FdArtSink(Sink):
         )
         check_vart(art)
         for hw, thumbnail in zip(
-            FD_THUMBNAIL_HWS, artrdr.render_thumbnail(art, FD_THUMBNAIL_HWS)
+            env.prologue.fd_thumbnail_hws,
+            artrdr.render_thumbnail(art, env.prologue.fd_thumbnail_hws),
         ):
             dst = env.fd_output_artifact(hw, self.__kind, self.__name)
             artio.save_artifact(thumbnail, dst)

src/assemblicon/highlevel/source/fdart_source.py

@@ -2,7 +2,7 @@ from .common import Source
 from ..address import Address, AddressDomain
 from ..environment import Environment
 from ..sink.fdart_sink import FdArtSink
-from ..utils import FdContext, FD_THUMBNAIL_HWS
+from ..utils import FdContext
 from ...lowlevel import artio
 from ...logger import HIGHLEVEL_LOGGER as LOGGER
 
@@ -28,7 +28,7 @@ class FdArtSource(Source):
             sink_hint.kind,
             sink_hint.name,
         )
-        for hw in FD_THUMBNAIL_HWS:
+        for hw in env.prologue.fd_thumbnail_hws:
             artio.link_artifact(
                 env.fd_output_artifact(hw, self.__kind, self.__name),
                 env.fd_output_artifact(hw, sink_hint.kind, sink_hint.name),

src/assemblicon/highlevel/utils.py

@@ -40,7 +40,5 @@ class MacCategory(enum.StrEnum):
     """Icons for file extensions"""
 
 
-# TODO: For easy testing, we only build 32x32 and 48x48.
-# Enable full generation after testing.
-FD_THUMBNAIL_HWS: tuple[int, ...] = (32, 48)
-# FD_THUMBNAIL_HWS: tuple[int, ...] = (16, 32, 48, 64, 128, 256)
+DEFAULT_FD_THUMBNAIL_HWS: tuple[int, ...] = (16, 32, 48, 64, 128, 256)
+"""The default collection of sizes for generating FreeDesktop icons."""