First implementation based on android

2025-08-06 16:39:36 +08:00 · 2020-01-31 19:33:37 +01:00
parent 975b167a8e
commit 711087fd25
602 changed files with 18858 additions and 143 deletions
--- a/lib/src/parser/animatable_path_value_parser.dart
+++ b/lib/src/parser/animatable_path_value_parser.dart
@ -0,0 +1,83 @@
+import 'dart:ui';
+import '../composition.dart';
+import '../model/animatable/animatable_double_value.dart';
+import '../model/animatable/animatable_path_value.dart';
+import '../model/animatable/animatable_split_dimension_path_value.dart';
+import '../model/animatable/animatable_value.dart';
+import '../value/keyframe.dart';
+import 'animatable_value_parser.dart';
+import 'json_utils.dart';
+import 'keyframes_parser.dart';
+import 'moshi/json_reader.dart';
+import 'path_keyframe_parser.dart';
+
+class AnimatablePathValueParser {
+  static final _NAMES = JsonReaderOptions.of(['k', 'x', 'y']);
+
+  AnimatablePathValueParser._();
+
+  static AnimatablePathValue parse(
+      JsonReader reader, LottieComposition composition) {
+    var keyframes = <Keyframe<Offset>>[];
+    if (reader.peek() == Token.BEGIN_ARRAY) {
+      reader.beginArray();
+      while (reader.hasNext()) {
+        keyframes.add(PathKeyframeParser.parse(reader, composition));
+      }
+      reader.endArray();
+      KeyframesParser.setEndFrames(keyframes);
+    } else {
+      keyframes.add(Keyframe<Offset>.nonAnimated(
+          JsonUtils.jsonToPoint(reader, window.devicePixelRatio)));
+    }
+    return AnimatablePathValue.fromKeyframes(keyframes);
+  }
+
+  /// Returns either an {@link AnimatablePathValue} or an {@link AnimatableSplitDimensionPathValue}.
+  static AnimatableValue<Offset, Offset> parseSplitPath(
+      JsonReader reader, LottieComposition composition) {
+    AnimatablePathValue pathAnimation;
+    AnimatableDoubleValue xAnimation;
+    AnimatableDoubleValue yAnimation;
+
+    var hasExpressions = false;
+
+    reader.beginObject();
+    while (reader.peek() != Token.END_OBJECT) {
+      switch (reader.selectName(_NAMES)) {
+        case 0:
+          pathAnimation = AnimatablePathValueParser.parse(reader, composition);
+          break;
+        case 1:
+          if (reader.peek() == Token.STRING) {
+            hasExpressions = true;
+            reader.skipValue();
+          } else {
+            xAnimation = AnimatableValueParser.parseFloat(reader, composition);
+          }
+          break;
+        case 2:
+          if (reader.peek() == Token.STRING) {
+            hasExpressions = true;
+            reader.skipValue();
+          } else {
+            yAnimation = AnimatableValueParser.parseFloat(reader, composition);
+          }
+          break;
+        default:
+          reader.skipName();
+          reader.skipValue();
+      }
+    }
+    reader.endObject();
+
+    if (hasExpressions) {
+      composition.addWarning("Lottie doesn't support expressions.");
+    }
+
+    if (pathAnimation != null) {
+      return pathAnimation;
+    }
+    return AnimatableSplitDimensionPathValue(xAnimation, yAnimation);
+  }
+}