🚀 Adapt the image provider file type getter (#638)

Author: AlexV525

CHANGELOG.md

@@ -9,7 +9,11 @@ that can be found in the LICENSE file. -->
 
 ## Unreleased
 
-*None.*
+### Improvements
+
+- Adapt the file type getter from the image provider to get a precise file type in grid.
+- Adds the identifier for grid item's semantics.
+- Improves preview page back button.
 
 ## 9.3.1
 

lib/src/delegates/asset_picker_builder_delegate.dart

@@ -414,7 +414,10 @@ abstract class AssetPickerBuilderDelegate<Asset, Path> {
           gradient: LinearGradient(
             begin: AlignmentDirectional.bottomCenter,
             end: AlignmentDirectional.topCenter,
-            colors: <Color>[theme.dividerColor, Colors.transparent],
+            colors: <Color>[
+              theme.canvasColor.withAlpha(128),
+              Colors.transparent,
+            ],
           ),
         ),
         child: Container(
@@ -428,11 +431,9 @@ abstract class AssetPickerBuilderDelegate<Asset, Path> {
           child: ScaleText(
             textDelegate.gifIndicator,
             style: TextStyle(
-              color: isAppleOS(context)
-                  ? theme.textTheme.bodyMedium?.color
-                  : theme.primaryColor,
-              fontSize: 13,
-              fontWeight: FontWeight.w500,
+              color: theme.textTheme.bodyMedium?.color,
+              fontSize: 12,
+              fontWeight: FontWeight.bold,
             ),
             semanticsLabel: semanticsTextDelegate.gifIndicator,
             strutStyle: const StrutStyle(forceStrutHeight: true, height: 1),
@@ -1503,6 +1504,7 @@ class DefaultAssetPickerBuilderDelegate
               enabled: !isBanned,
               excludeSemantics: true,
               focusable: !isSwitchingPath,
+              identifier: asset.id,
               label: '${semanticsTextDelegate.semanticTypeLabel(asset.type)}'
                   '${semanticIndex(index)}, '
                   '${asset.createDateTime.toString().replaceAll('.000', '')}',
@@ -1718,12 +1720,6 @@ class DefaultAssetPickerBuilderDelegate
           isOriginal: false,
           thumbnailSize: gridThumbnailSize,
         );
-        SpecialImageType? type;
-        if (imageProvider.imageFileType == ImageFileType.gif) {
-          type = SpecialImageType.gif;
-        } else if (imageProvider.imageFileType == ImageFileType.heic) {
-          type = SpecialImageType.heic;
-        }
         return Stack(
           fit: StackFit.expand,
           children: <Widget>[
@@ -1733,8 +1729,16 @@ class DefaultAssetPickerBuilderDelegate
                 failedItemBuilder: failedItemBuilder,
               ),
             ),
-            if (type == SpecialImageType.gif) // 如果为GIF则显示标识
-              gifIndicator(context, asset),
+            FutureBuilder(
+              future: imageProvider.imageFileType,
+              builder: (context, snapshot) {
+                if (snapshot.data case final type?
+                    when type == ImageFileType.gif) {
+                  return gifIndicator(context, asset);
+                }
+                return const SizedBox.shrink();
+              },
+            ),
             if (asset.type == AssetType.video) // 如果为视频则显示标识
               videoIndicator(context, asset),
             if (asset.isLivePhoto) buildLivePhotoIndicator(context, asset),

lib/src/delegates/asset_picker_viewer_builder_delegate.dart

@@ -734,10 +734,10 @@ class DefaultAssetPickerViewerBuilderDelegate
           onPressed: () {
             Navigator.maybeOf(context)?.maybePop();
           },
-          tooltip: MaterialLocalizations.of(context).closeButtonTooltip,
+          tooltip: MaterialLocalizations.of(context).backButtonTooltip,
           icon: Icon(
-            Icons.close,
-            semanticLabel: MaterialLocalizations.of(context).closeButtonTooltip,
+            Icons.arrow_back_ios_new,
+            semanticLabel: MaterialLocalizations.of(context).backButtonTooltip,
           ),
         ),
       ),

pubspec.yaml

@@ -25,8 +25,8 @@ dependencies:
   wechat_picker_library: ^1.0.5
 
   extended_image: ^8.3.0
-  photo_manager: ^3.4.0
-  photo_manager_image_provider: ^2.1.2
+  photo_manager: ^3.5.0
+  photo_manager_image_provider: ^2.2.0
   provider: ^6.0.5
   video_player: ^2.7.0
   visibility_detector: ^0.4.0