1 files changed, 120 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/research/Replayer.java b/java/src/com/android/inputmethod/research/Replayer.java
new file mode 100644
index 000000000..4cc2a5814
--- /dev/null
+++ b/java/src/com/android/inputmethod/research/Replayer.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2012 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.inputmethod.research;
+
+import android.os.Handler;
+import android.os.Message;
+import android.os.SystemClock;
+import android.util.Log;
+import android.view.MotionEvent;
+
+import com.android.inputmethod.keyboard.KeyboardSwitcher;
+import com.android.inputmethod.keyboard.MainKeyboardView;
+import com.android.inputmethod.latin.define.ProductionFlag;
+import com.android.inputmethod.research.MotionEventReader.ReplayData;
+
+/**
+ * Replays a sequence of motion events in realtime on the screen.
+ *
+ * Useful for user inspection of logged data.
+ */
+public class Replayer {
+    private static final String TAG = Replayer.class.getSimpleName();
+    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final long START_TIME_DELAY_MS = 500;
+
+    private boolean mIsReplaying = false;
+    private KeyboardSwitcher mKeyboardSwitcher;
+
+    public void setKeyboardSwitcher(final KeyboardSwitcher keyboardSwitcher) {
+        mKeyboardSwitcher = keyboardSwitcher;
+    }
+
+    private static final int MSG_MOTION_EVENT = 0;
+    private static final int MSG_DONE = 1;
+    private static final int COMPLETION_TIME_MS = 500;
+
+    // TODO: Support historical events and multi-touch.
+    public void replay(final ReplayData replayData) {
+        if (mIsReplaying) {
+            return;
+        }
+
+        mIsReplaying = true;
+        final int numActions = replayData.mActions.size();
+        if (DEBUG) {
+            Log.d(TAG, "replaying " + numActions + " actions");
+        }
+        if (numActions == 0) {
+            mIsReplaying = false;
+            return;
+        }
+        final MainKeyboardView mainKeyboardView = mKeyboardSwitcher.getMainKeyboardView();
+
+        // The reference time relative to the times stored in events.
+        final long origStartTime = replayData.mTimes.get(0);
+        // The reference time relative to which events are replayed in the present.
+        final long currentStartTime = SystemClock.uptimeMillis() + START_TIME_DELAY_MS;
+        // The adjustment needed to translate times from the original recorded time to the current
+        // time.
+        final long timeAdjustment = currentStartTime - origStartTime;
+        final Handler handler = new Handler() {
+            // Track the time of the most recent DOWN event, to be passed as a parameter when
+            // constructing a MotionEvent.  It's initialized here to the origStartTime, but this is
+            // only a precaution.  The value should be overwritten by the first ACTION_DOWN event
+            // before the first use of the variable.  Note that this may cause the first few events
+            // to have incorrect {@code downTime}s.
+            private long mOrigDownTime = origStartTime;
+
+            @Override
+            public void handleMessage(final Message msg) {
+                switch (msg.what) {
+                case MSG_MOTION_EVENT:
+                    final int index = msg.arg1;
+                    final int action = replayData.mActions.get(index);
+                    final int x = replayData.mXCoords.get(index);
+                    final int y = replayData.mYCoords.get(index);
+                    final long origTime = replayData.mTimes.get(index);
+                    if (action == MotionEvent.ACTION_DOWN) {
+                        mOrigDownTime = origTime;
+                    }
+
+                    final MotionEvent me = MotionEvent.obtain(mOrigDownTime + timeAdjustment,
+                            origTime + timeAdjustment, action, x, y, 0);
+                    mainKeyboardView.processMotionEvent(me);
+                    me.recycle();
+                    break;
+                case MSG_DONE:
+                    mIsReplaying = false;
+                    break;
+                }
+            }
+        };
+
+        for (int i = 0; i < numActions; i++) {
+            final Message msg = Message.obtain(handler, MSG_MOTION_EVENT, i, 0);
+            final long msgTime = replayData.mTimes.get(i) + timeAdjustment;
+            handler.sendMessageAtTime(msg, msgTime);
+            if (DEBUG) {
+                Log.d(TAG, "queuing event at " + msgTime);
+            }
+        }
+        final long presentDoneTime = replayData.mTimes.get(numActions - 1) + timeAdjustment
+                + COMPLETION_TIME_MS;
+        handler.sendMessageAtTime(Message.obtain(handler, MSG_DONE), presentDoneTime);
+    }
+}