diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/rest/media/v1/thumbnail_resource.py | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py index a029d426f0..12bd745cb2 100644 --- a/synapse/rest/media/v1/thumbnail_resource.py +++ b/synapse/rest/media/v1/thumbnail_resource.py @@ -15,7 +15,7 @@ import logging -from typing import TYPE_CHECKING, Any, Dict, List, Optional +from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple from twisted.web.server import Request @@ -414,9 +414,9 @@ class ThumbnailResource(DirectServeJsonResource): if desired_method == "crop": # Thumbnails that match equal or larger sizes of desired width/height. - crop_info_list = [] + crop_info_list: List[Tuple[int, int, int, bool, int, Dict[str, Any]]] = [] # Other thumbnails. - crop_info_list2 = [] + crop_info_list2: List[Tuple[int, int, int, bool, int, Dict[str, Any]]] = [] for info in thumbnail_infos: # Skip thumbnails generated with different methods. if info["thumbnail_method"] != "crop": @@ -451,15 +451,19 @@ class ThumbnailResource(DirectServeJsonResource): info, ) ) + # Pick the most appropriate thumbnail. Some values of `desired_width` and + # `desired_height` may result in a tie, in which case we avoid comparing on + # the thumbnail info dictionary and pick the thumbnail that appears earlier + # in the list of candidates. if crop_info_list: - thumbnail_info = min(crop_info_list)[-1] + thumbnail_info = min(crop_info_list, key=lambda t: t[:-1])[-1] elif crop_info_list2: - thumbnail_info = min(crop_info_list2)[-1] + thumbnail_info = min(crop_info_list2, key=lambda t: t[:-1])[-1] elif desired_method == "scale": # Thumbnails that match equal or larger sizes of desired width/height. - info_list = [] + info_list: List[Tuple[int, bool, int, Dict[str, Any]]] = [] # Other thumbnails. - info_list2 = [] + info_list2: List[Tuple[int, bool, int, Dict[str, Any]]] = [] for info in thumbnail_infos: # Skip thumbnails generated with different methods. @@ -477,10 +481,14 @@ class ThumbnailResource(DirectServeJsonResource): info_list2.append( (size_quality, type_quality, length_quality, info) ) + # Pick the most appropriate thumbnail. Some values of `desired_width` and + # `desired_height` may result in a tie, in which case we avoid comparing on + # the thumbnail info dictionary and pick the thumbnail that appears earlier + # in the list of candidates. if info_list: - thumbnail_info = min(info_list)[-1] + thumbnail_info = min(info_list, key=lambda t: t[:-1])[-1] elif info_list2: - thumbnail_info = min(info_list2)[-1] + thumbnail_info = min(info_list2, key=lambda t: t[:-1])[-1] if thumbnail_info: return FileInfo( |