1 files changed, 72 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/classifier/Stroke.java b/java/com/android/incallui/answer/impl/classifier/Stroke.java
new file mode 100644
index 000000000..c542d0f7c
--- /dev/null
+++ b/java/com/android/incallui/answer/impl/classifier/Stroke.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.incallui.answer.impl.classifier;
+
+import java.util.ArrayList;
+
+/**
+ * Contains data about a stroke (a single trace, all the events from a given id from the
+ * DOWN/POINTER_DOWN event till the UP/POINTER_UP/CANCEL event.)
+ */
+class Stroke {
+
+  private static final float NANOS_TO_SECONDS = 1e9f;
+
+  private ArrayList<Point> mPoints = new ArrayList<>();
+  private long mStartTimeNano;
+  private long mEndTimeNano;
+  private float mLength;
+  private final float mDpi;
+
+  public Stroke(long eventTimeNano, float dpi) {
+    mDpi = dpi;
+    mStartTimeNano = mEndTimeNano = eventTimeNano;
+  }
+
+  public void addPoint(float x, float y, long eventTimeNano) {
+    mEndTimeNano = eventTimeNano;
+    Point point = new Point(x / mDpi, y / mDpi, eventTimeNano - mStartTimeNano);
+    if (!mPoints.isEmpty()) {
+      mLength += mPoints.get(mPoints.size() - 1).dist(point);
+    }
+    mPoints.add(point);
+  }
+
+  public int getCount() {
+    return mPoints.size();
+  }
+
+  public float getTotalLength() {
+    return mLength;
+  }
+
+  public float getEndPointLength() {
+    return mPoints.get(0).dist(mPoints.get(mPoints.size() - 1));
+  }
+
+  public long getDurationNanos() {
+    return mEndTimeNano - mStartTimeNano;
+  }
+
+  public float getDurationSeconds() {
+    return (float) getDurationNanos() / NANOS_TO_SECONDS;
+  }
+
+  public ArrayList<Point> getPoints() {
+    return mPoints;
+  }
+}