Inline small gallery layout helpers

This removes two one-use helper functions from the gallery plugin and
inlines their simple calculations at the call sites.

The layout scoring and subset mask creation remain unchanged, but the
code is a little shorter and easier to follow.

1 files changed, 2 insertions, 19 deletions

diff --git a/packages/gallery/lektor_gallery.py b/packages/gallery/lektor_gallery.py
index b2f5e9f..779aa38 100644
--- a/packages/gallery/lektor_gallery.py
+++ b/packages/gallery/lektor_gallery.py
@@ -238,10 +238,7 @@ def select_cached_layout(
     return min(
         candidates,
         key=lambda candidate: (
-            final_score(
-                candidate,
-                target_ratio=target_ratio,
-            ),
+            abs(log(candidate.ratio / target_ratio)) + structure_score(candidate),
             candidate.signature,
         ),
     )
@@ -398,7 +395,7 @@ def build_candidates(
             all_indices,
             subset_size,
         ):
-            mask = mask_for(indices)
+            mask = sum(1 << index for index in indices)
             first_bit = mask & -mask
 
             generated: dict[float, Node] = {}
@@ -426,11 +423,6 @@ def build_candidates(
     return candidates[(1 << count) - 1]
 
 
-def mask_for(indices) -> int:
-    """Return the bit mask representing a sequence of image indices."""
-    return sum(1 << index for index in indices)
-
-
 def combine_partitions(
     generated: dict[float, Node],
     first_candidates: Sequence[Node],
@@ -599,15 +591,6 @@ def structure_score(node: Node) -> float:
     )
 
 
-def final_score(
-    node: Node,
-    *,
-    target_ratio: float,
-) -> float:
-    """Score a complete layout against the requested gallery ratio."""
-    return abs(log(node.ratio / target_ratio)) + structure_score(node)
-
-
 class GalleryPlugin(Plugin):
     name = "Gallery"
     description = "Static aspect-ratio-aware image gallery layouts."