diff options
Diffstat (limited to 'java/src/com/android/inputmethod/research/MotionEventReader.java')
| -rw-r--r-- | java/src/com/android/inputmethod/research/MotionEventReader.java | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/research/MotionEventReader.java b/java/src/com/android/inputmethod/research/MotionEventReader.java new file mode 100644 index 000000000..e59adfa19 --- /dev/null +++ b/java/src/com/android/inputmethod/research/MotionEventReader.java @@ -0,0 +1,332 @@ +/* + * Copyright (C) 2013 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.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; + +import java.io.BufferedReader; +import java.io.File; +import java.io.FileInputStream; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStreamReader; +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(); + try { + // Read file + final JsonReader jsonReader = new JsonReader(new BufferedReader(new InputStreamReader( + new FileInputStream(file)))); + jsonReader.beginArray(); + while (jsonReader.hasNext()) { + readLogStatement(jsonReader, replayData); + } + jsonReader.endArray(); + } catch (FileNotFoundException e) { + e.printStackTrace(); + } catch (IOException e) { + e.printStackTrace(); + } + return replayData; + } + + static class ReplayData { + final ArrayList<Integer> mActions = new ArrayList<Integer>(); + final ArrayList<PointerProperties[]> mPointerPropertiesArrays + = new ArrayList<PointerProperties[]>(); + final ArrayList<PointerCoords[]> mPointerCoordsArrays = new ArrayList<PointerCoords[]>(); + final ArrayList<Long> mTimes = new ArrayList<Long>(); + } + + /** + * 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; + int actionType = UNINITIALIZED_ACTION; + int x = UNINITIALIZED_INT; + int y = UNINITIALIZED_INT; + long time = UNINITIALIZED_LONG; + boolean isLoggingRelated = false; + + jsonReader.beginObject(); + while (jsonReader.hasNext()) { + final String key = jsonReader.nextName(); + if (key.equals("_ty")) { + logStatementType = jsonReader.nextString(); + } else if (key.equals("_ut")) { + time = jsonReader.nextLong(); + } else if (key.equals("x")) { + x = jsonReader.nextInt(); + } else if (key.equals("y")) { + y = jsonReader.nextInt(); + } else if (key.equals("action")) { + final String s = jsonReader.nextString(); + if (s.equals("UP")) { + actionType = MotionEvent.ACTION_UP; + } else if (s.equals("DOWN")) { + actionType = MotionEvent.ACTION_DOWN; + } else if (s.equals("MOVE")) { + actionType = MotionEvent.ACTION_MOVE; + } + } else if (key.equals("loggingRelated")) { + 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); + } + jsonReader.skipValue(); + } + } + jsonReader.endObject(); + + 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); + } +} |