[Rlog48c] Replay historical motion data

Change-Id: Ib398ea61ff048b1a4ac3b7f7b4a772e173a7b294

1 files changed, 236 insertions, 17 deletions

diff --git a/java/src/com/android/inputmethod/research/MotionEventReader.java b/java/src/com/android/inputmethod/research/MotionEventReader.java
index 26a1d7f55..e59adfa19 100644
--- a/java/src/com/android/inputmethod/research/MotionEventReader.java
+++ b/java/src/com/android/inputmethod/research/MotionEventReader.java
@@ -19,6 +19,8 @@ package com.android.inputmethod.research;
 import android.util.JsonReader;
 import android.util.Log;
 import android.view.MotionEvent;
+import android.view.MotionEvent.PointerCoords;
+import android.view.MotionEvent.PointerProperties;
 
 import com.android.inputmethod.latin.define.ProductionFlag;
 
@@ -33,6 +35,14 @@ import java.util.ArrayList;
 public class MotionEventReader {
     private static final String TAG = MotionEventReader.class.getSimpleName();
     private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    // Assumes that MotionEvent.ACTION_MASK does not have all bits set.`
+    private static final int UNINITIALIZED_ACTION = ~MotionEvent.ACTION_MASK;
+    // No legitimate int is negative
+    private static final int UNINITIALIZED_INT = -1;
+    // No legitimate long is negative
+    private static final long UNINITIALIZED_LONG = -1L;
+    // No legitimate float is negative
+    private static final float UNINITIALIZED_FLOAT = -1.0f;
 
     public ReplayData readMotionEventData(final File file) {
         final ReplayData replayData = new ReplayData();
@@ -55,19 +65,82 @@ public class MotionEventReader {
 
     static class ReplayData {
         final ArrayList<Integer> mActions = new ArrayList<Integer>();
-        final ArrayList<Integer> mXCoords = new ArrayList<Integer>();
-        final ArrayList<Integer> mYCoords = new ArrayList<Integer>();
+        final ArrayList<PointerProperties[]> mPointerPropertiesArrays
+                = new ArrayList<PointerProperties[]>();
+        final ArrayList<PointerCoords[]> mPointerCoordsArrays = new ArrayList<PointerCoords[]>();
         final ArrayList<Long> mTimes = new ArrayList<Long>();
     }
 
-    private void readLogStatement(final JsonReader jsonReader, final ReplayData replayData)
-            throws IOException {
+    /**
+     * Read motion data from a logStatement and store it in {@code replayData}.
+     *
+     * Two kinds of logStatements can be read.  In the first variant, the MotionEvent data is
+     * represented as attributes at the top level like so:
+     *
+     * <pre>
+     * {
+     *   "_ct": 1359590400000,
+     *   "_ut": 4381933,
+     *   "_ty": "MotionEvent",
+     *   "action": "UP",
+     *   "isLoggingRelated": false,
+     *   "x": 100,
+     *   "y": 200
+     * }
+     * </pre>
+     *
+     * In the second variant, there is a separate attribute for the MotionEvent that includes
+     * historical data if present:
+     *
+     * <pre>
+     * {
+     *   "_ct": 135959040000,
+     *   "_ut": 4382702,
+     *   "_ty": "MotionEvent",
+     *   "action": "MOVE",
+     *   "isLoggingRelated": false,
+     *   "motionEvent": {
+     *     "pointerIds": [
+     *       0
+     *     ],
+     *     "xyt": [
+     *       {
+     *         "t": 4382551,
+     *         "d": [
+     *           {
+     *             "x": 141.25,
+     *             "y": 151.8485107421875,
+     *             "toma": 101.82337188720703,
+     *             "tomi": 101.82337188720703,
+     *             "o": 0.0
+     *           }
+     *         ]
+     *       },
+     *       {
+     *         "t": 4382559,
+     *         "d": [
+     *           {
+     *             "x": 140.7266082763672,
+     *             "y": 151.8485107421875,
+     *             "toma": 101.82337188720703,
+     *             "tomi": 101.82337188720703,
+     *             "o": 0.0
+     *           }
+     *         ]
+     *       }
+     *     ]
+     *   }
+     * },
+     * </pre>
+     */
+    /* package for test */ void readLogStatement(final JsonReader jsonReader,
+            final ReplayData replayData) throws IOException {
         String logStatementType = null;
-        Integer actionType = null;
-        Integer x = null;
-        Integer y = null;
-        Long time = null;
-        boolean loggingRelated = false;
+        int actionType = UNINITIALIZED_ACTION;
+        int x = UNINITIALIZED_INT;
+        int y = UNINITIALIZED_INT;
+        long time = UNINITIALIZED_LONG;
+        boolean isLoggingRelated = false;
 
         jsonReader.beginObject();
         while (jsonReader.hasNext()) {
@@ -90,7 +163,18 @@ public class MotionEventReader {
                     actionType = MotionEvent.ACTION_MOVE;
                 }
             } else if (key.equals("loggingRelated")) {
-                loggingRelated = jsonReader.nextBoolean();
+                isLoggingRelated = jsonReader.nextBoolean();
+            } else if (logStatementType != null && logStatementType.equals("MotionEvent")
+                    && key.equals("motionEvent")) {
+                if (actionType == UNINITIALIZED_ACTION) {
+                    Log.e(TAG, "no actionType assigned in MotionEvent json");
+                }
+                // Second variant of LogStatement.
+                if (isLoggingRelated) {
+                    jsonReader.skipValue();
+                } else {
+                    readEmbeddedMotionEvent(jsonReader, replayData, actionType);
+                }
             } else {
                 if (DEBUG) {
                     Log.w(TAG, "Unknown JSON key in LogStatement: " + key);
@@ -100,14 +184,149 @@ public class MotionEventReader {
         }
         jsonReader.endObject();
 
-        if (logStatementType != null && time != null && x != null && y != null && actionType != null
-                && logStatementType.equals("MotionEvent")
-                && !loggingRelated) {
-            replayData.mActions.add(actionType);
-            replayData.mXCoords.add(x);
-            replayData.mYCoords.add(y);
-            replayData.mTimes.add(time);
+        if (logStatementType != null && time != UNINITIALIZED_LONG && x != UNINITIALIZED_INT
+                && y != UNINITIALIZED_INT && actionType != UNINITIALIZED_ACTION
+                && logStatementType.equals("MotionEvent") && !isLoggingRelated) {
+            // First variant of LogStatement.
+            final PointerProperties pointerProperties = new PointerProperties();
+            pointerProperties.id = 0;
+            pointerProperties.toolType = MotionEvent.TOOL_TYPE_UNKNOWN;
+            final PointerProperties[] pointerPropertiesArray = {
+                pointerProperties
+            };
+            final PointerCoords pointerCoords = new PointerCoords();
+            pointerCoords.x = x;
+            pointerCoords.y = y;
+            pointerCoords.pressure = 1.0f;
+            pointerCoords.size = 1.0f;
+            final PointerCoords[] pointerCoordsArray = {
+                pointerCoords
+            };
+            addMotionEventData(replayData, actionType, time, pointerPropertiesArray,
+                    pointerCoordsArray);
+        }
+    }
+
+    private void readEmbeddedMotionEvent(final JsonReader jsonReader, final ReplayData replayData,
+            final int actionType) throws IOException {
+        jsonReader.beginObject();
+        PointerProperties[] pointerPropertiesArray = null;
+        while (jsonReader.hasNext()) {  // pointerIds/xyt
+            final String name = jsonReader.nextName();
+            if (name.equals("pointerIds")) {
+                pointerPropertiesArray = readPointerProperties(jsonReader);
+            } else if (name.equals("xyt")) {
+                readPointerData(jsonReader, replayData, actionType, pointerPropertiesArray);
+            }
+        }
+        jsonReader.endObject();
+    }
+
+    private PointerProperties[] readPointerProperties(final JsonReader jsonReader)
+            throws IOException {
+        final ArrayList<PointerProperties> pointerPropertiesArrayList =
+                new ArrayList<PointerProperties>();
+        jsonReader.beginArray();
+        while (jsonReader.hasNext()) {
+            final PointerProperties pointerProperties = new PointerProperties();
+            pointerProperties.id = jsonReader.nextInt();
+            pointerProperties.toolType = MotionEvent.TOOL_TYPE_UNKNOWN;
+            pointerPropertiesArrayList.add(pointerProperties);
+        }
+        jsonReader.endArray();
+        return pointerPropertiesArrayList.toArray(
+                new PointerProperties[pointerPropertiesArrayList.size()]);
+    }
+
+    private void readPointerData(final JsonReader jsonReader, final ReplayData replayData,
+            final int actionType, final PointerProperties[] pointerPropertiesArray)
+            throws IOException {
+        if (pointerPropertiesArray == null) {
+            Log.e(TAG, "PointerIDs must be given before xyt data in json for MotionEvent");
+            jsonReader.skipValue();
+            return;
+        }
+        long time = UNINITIALIZED_LONG;
+        jsonReader.beginArray();
+        while (jsonReader.hasNext()) {  // Array of historical data
+            jsonReader.beginObject();
+            final ArrayList<PointerCoords> pointerCoordsArrayList = new ArrayList<PointerCoords>();
+            while (jsonReader.hasNext()) {  // Time/data object
+                final String name = jsonReader.nextName();
+                if (name.equals("t")) {
+                    time = jsonReader.nextLong();
+                } else if (name.equals("d")) {
+                    jsonReader.beginArray();
+                    while (jsonReader.hasNext()) {  // array of data per pointer
+                        final PointerCoords pointerCoords = readPointerCoords(jsonReader);
+                        if (pointerCoords != null) {
+                            pointerCoordsArrayList.add(pointerCoords);
+                        }
+                    }
+                    jsonReader.endArray();
+                } else {
+                    jsonReader.skipValue();
+                }
+            }
+            jsonReader.endObject();
+            // Data was recorded as historical events, but must be split apart into
+            // separate MotionEvents for replaying
+            if (time != UNINITIALIZED_LONG) {
+                addMotionEventData(replayData, actionType, time, pointerPropertiesArray,
+                        pointerCoordsArrayList.toArray(
+                                new PointerCoords[pointerCoordsArrayList.size()]));
+            } else {
+                Log.e(TAG, "Time not assigned in json for MotionEvent");
+            }
+        }
+        jsonReader.endArray();
+    }
+
+    private PointerCoords readPointerCoords(final JsonReader jsonReader) throws IOException {
+        jsonReader.beginObject();
+        float x = UNINITIALIZED_FLOAT;
+        float y = UNINITIALIZED_FLOAT;
+        while (jsonReader.hasNext()) {  // x,y
+            final String name = jsonReader.nextName();
+            if (name.equals("x")) {
+                x = (float) jsonReader.nextDouble();
+            } else if (name.equals("y")) {
+                y = (float) jsonReader.nextDouble();
+            } else {
+                jsonReader.skipValue();
+            }
+        }
+        jsonReader.endObject();
+
+        if (Float.compare(x, UNINITIALIZED_FLOAT) == 0
+                || Float.compare(y, UNINITIALIZED_FLOAT) == 0) {
+            Log.w(TAG, "missing x or y value in MotionEvent json");
+            return null;
         }
+        final PointerCoords pointerCoords = new PointerCoords();
+        pointerCoords.x = x;
+        pointerCoords.y = y;
+        pointerCoords.pressure = 1.0f;
+        pointerCoords.size = 1.0f;
+        return pointerCoords;
+    }
+
+    /**
+     * Tests that {@code x} is uninitialized.
+     *
+     * Assumes that {@code x} will never be given a valid value less than 0, and that
+     * UNINITIALIZED_FLOAT is less than 0.0f.
+     */
+    private boolean isUninitializedFloat(final float x) {
+        return x < 0.0f;
     }
 
+    private void addMotionEventData(final ReplayData replayData, final int actionType,
+            final long time, final PointerProperties[] pointerProperties,
+            final PointerCoords[] pointerCoords) {
+        replayData.mActions.add(actionType);
+        replayData.mTimes.add(time);
+        replayData.mPointerPropertiesArrays.add(pointerProperties);
+        replayData.mPointerCoordsArrays.add(pointerCoords);
+    }
 }