Update all Angular libs (run update_all.sh).

third_party/pkg/angular/lib/animate/animations.dart

+part of angular.animate;
+
+/**
+ * A [LoopedAnimation] is used with the [AnimationLoop] to drive window
+ * animation frame animations. This provides hooks for dom reads and updates so
+ * that they can be batched together to prevent excessive dom recalculations
+ * when running multiple animations.
+ */
+abstract class LoopedAnimation implements Animation {
+
+  /**
+   * This is used to batch dom read operations to prevent excessive
+   * recalculations when dom is modified.
+   *
+   * [timeInMs] is the time since the last animation frame.
+   */
+  void read(num timeInMs) { }
+  
+  /**
+   * Occurs every animation frame. Return false to stop receiving animation
+   * frame updates. Detach will be called after [update] returns false.
+   *
+   * [timeInMs] is the time since the last animation frame.
+   */
+  bool update(num timeInMs) { return false; }
+}
+
+/**
+ * This is a proxy class for dealing with a set of elements where the 'same'
+ * or similar animations are being run on them and it's more convenient to have
+ * a merged animation to control and listen to a set of animations.
+ */
+class AnimationList extends Animation {
+  final List<Animation> _animations;
+  Future<AnimationResult> _onCompleted;
+
+  /**
+   * [OnCompleted] executes once all the OnCompleted futures for each of the
+   * animations completes.
+   *
+   * if every animation returns [AnimationResult.COMPLETED],
+   *   [AnimationResult.COMPLETED] will be returned.
+   * if any animation was [AnimationResult.COMPLETED_IGNORED] instead, even if
+   *   some animations were completed, [AnimationResult.COMPLETED_IGNORED] will
+   *   be returned.
+   * if any animation was [AnimationResult.CANCELED], the result will be
+   *   [AnimationResult.CANCELED].
+   */
+  Future<AnimationResult> get onCompleted {
+    if (_onCompleted == null) {
+      _onCompleted = Future.wait(_animations.map((x) => x.onCompleted))
+        .then((results) {
+          var rtrn = AnimationResult.COMPLETED;
+          for (var result in results) {
+            if (result == AnimationResult.CANCELED)
+              return AnimationResult.CANCELED;
+            if (result == AnimationResult.COMPLETED_IGNORED)
+              rtrn = result;
+          }
+          return rtrn;
+        });
+    }
+    
+    return _onCompleted;
+  }
+
+  /// track and create a new [Animation] that acts as a proxy to a list of
+  /// existing [Animation]s.
+  AnimationList(this._animations);
+
+  /// For each of the tracked [Animation]s, call complete().
+  void complete() {
+    for (var animation in _animations) {
+      animation.complete();
+    }
+  }
+
+  /// For each of the tracked [Animation]s, call cancel().
+  void cancel() {
+    for (var animation in _animations) {
+      animation.cancel();
+    }
+  }
+}
+
+Animation _animationFromList(Iterable<Animation> animations) {
+  if (animations == null) {
+    return new NoOpAnimation();
+  }
+
+  List<Animation> list = animations.toList();
+ 
+  if (list.length == 0) {
+    return new NoOpAnimation();
+  }
+  if (list.length == 1) {
+    return list.first;
+  }
+  return new AnimationList(list);
+}