1 files changed, 96 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/classifier/ClassifierData.java b/java/com/android/incallui/answer/impl/classifier/ClassifierData.java
new file mode 100644
index 000000000..ae07d27a0
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+++ b/java/com/android/incallui/answer/impl/classifier/ClassifierData.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 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 android.util.SparseArray;
+import android.view.MotionEvent;
+import java.util.ArrayList;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Contains data which is used to classify interaction sequences on the lockscreen. It does, for
+ * example, provide information on the current touch state.
+ */
+class ClassifierData {
+  private SparseArray<Stroke> mCurrentStrokes = new SparseArray<>();
+  private ArrayList<Stroke> mEndingStrokes = new ArrayList<>();
+  private final float mDpi;
+  private final float mScreenHeight;
+
+  public ClassifierData(float dpi, float screenHeight) {
+    mDpi = dpi;
+    mScreenHeight = screenHeight / dpi;
+  }
+
+  public void update(MotionEvent event) {
+    mEndingStrokes.clear();
+    int action = event.getActionMasked();
+    if (action == MotionEvent.ACTION_DOWN) {
+      mCurrentStrokes.clear();
+    }
+
+    for (int i = 0; i < event.getPointerCount(); i++) {
+      int id = event.getPointerId(i);
+      if (mCurrentStrokes.get(id) == null) {
+        // TODO (keyboardr): See if there's a way to use event.getEventTimeNanos() instead
+        mCurrentStrokes.put(
+            id, new Stroke(TimeUnit.MILLISECONDS.toNanos(event.getEventTime()), mDpi));
+      }
+      mCurrentStrokes
+          .get(id)
+          .addPoint(
+              event.getX(i), event.getY(i), TimeUnit.MILLISECONDS.toNanos(event.getEventTime()));
+
+      if (action == MotionEvent.ACTION_UP
+          || action == MotionEvent.ACTION_CANCEL
+          || (action == MotionEvent.ACTION_POINTER_UP && i == event.getActionIndex())) {
+        mEndingStrokes.add(getStroke(id));
+      }
+    }
+  }
+
+  void cleanUp(MotionEvent event) {
+    mEndingStrokes.clear();
+    int action = event.getActionMasked();
+    for (int i = 0; i < event.getPointerCount(); i++) {
+      int id = event.getPointerId(i);
+      if (action == MotionEvent.ACTION_UP
+          || action == MotionEvent.ACTION_CANCEL
+          || (action == MotionEvent.ACTION_POINTER_UP && i == event.getActionIndex())) {
+        mCurrentStrokes.remove(id);
+      }
+    }
+  }
+
+  /** @return the list of Strokes which are ending in the recently added MotionEvent */
+  public ArrayList<Stroke> getEndingStrokes() {
+    return mEndingStrokes;
+  }
+
+  /**
+   * @param id the id from MotionEvent
+   * @return the Stroke assigned to the id
+   */
+  public Stroke getStroke(int id) {
+    return mCurrentStrokes.get(id);
+  }
+
+  /** @return the height of the screen in inches */
+  public float getScreenHeight() {
+    return mScreenHeight;
+  }
+}