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Detection and logging of slow input connections.

Browse Source 
Also adds a hook to log using StatsUtils.
Proto change is coming in a separate CL.

Bug 22010482.

Change-Id: I08065fc7a5cd116e50ff84cb14bbbc44c4f14bc7
This commit is contained in:
Dan Zivkovic 2015-06-22 16:54:20 -07:00
parent 5a51e4a0a8
commit 73aaf68337
2 changed files with 60 additions and 7 deletions
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3
java-overridable/src/com/android/inputmethod/latin/utils/StatsUtils.java
View File

@ -101,4 +101,7 @@ public final class StatsUtils {
public static void onSettingsActivity(final String entryPoint) {
}
public static void onInputConnectionLaggy(final int operation, final long duration) {
}
}

64
java/src/com/android/inputmethod/latin/RichInputConnection.java
View File

@ -19,6 +19,7 @@ package com.android.inputmethod.latin;
import android.inputmethodservice.InputMethodService;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemClock;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.style.CharacterStyle;
@ -42,6 +43,7 @@ import com.android.inputmethod.latin.utils.DebugLogUtils;
import com.android.inputmethod.latin.utils.NgramContextUtils;
import com.android.inputmethod.latin.utils.ScriptUtils;
import com.android.inputmethod.latin.utils.SpannableStringUtils;
import com.android.inputmethod.latin.utils.StatsUtils;
import com.android.inputmethod.latin.utils.TextRange;
import javax.annotation.Nonnull;
@ -63,6 +65,16 @@ public final class RichInputConnection implements PrivateCommandPerformer {
private static final int NUM_CHARS_TO_GET_BEFORE_CURSOR = 40;
private static final int NUM_CHARS_TO_GET_AFTER_CURSOR = 40;
private static final int INVALID_CURSOR_POSITION = -1;
private static final long SLOW_INPUTCONNECTION_MS = 100;
private static final int OPERATION_GET_TEXT_BEFORE_CURSOR = 0;
private static final int OPERATION_GET_TEXT_AFTER_CURSOR = 1;
private static final int OPERATION_GET_WORD_RANGE_AT_CURSOR = 2;
private static final int OPERATION_RELOAD_TEXT_CACHE = 3;
private static final String[] OPERATION_NAMES = new String[] {
"GET_TEXT_BEFORE_CURSOR",
"GET_TEXT_AFTER_CURSOR",
"GET_WORD_RANGE_AT_CURSOR",
"RELOAD_TEXT_CACHE"};
/**
* This variable contains an expected value for the selection start position. This is where the
@ -206,9 +218,10 @@ public final class RichInputConnection implements PrivateCommandPerformer {
mIC = mParent.getCurrentInputConnection();
// Call upon the inputconnection directly since our own method is using the cache, and
// we want to refresh it.
final CharSequence textBeforeCursor = isConnected()
? mIC.getTextBeforeCursor(Constants.EDITOR_CONTENTS_CACHE_SIZE, 0)
: null;
final CharSequence textBeforeCursor = getTextBeforeCursorAndDetectLaggyConnection(
OPERATION_RELOAD_TEXT_CACHE,
Constants.EDITOR_CONTENTS_CACHE_SIZE,
0 /* flags */);
if (null == textBeforeCursor) {
// For some reason the app thinks we are not connected to it. This looks like a
// framework bug... Fall back to ground state and return false.
@ -372,13 +385,46 @@ public final class RichInputConnection implements PrivateCommandPerformer {
}
return s;
}
return getTextBeforeCursorAndDetectLaggyConnection(
OPERATION_GET_TEXT_BEFORE_CURSOR, n, flags);
}
private CharSequence getTextBeforeCursorAndDetectLaggyConnection(
final int operation, final int n, final int flags) {
mIC = mParent.getCurrentInputConnection();
return isConnected() ? mIC.getTextBeforeCursor(n, flags) : null;
if (!isConnected()) {
return null;
}
long startTime = SystemClock.uptimeMillis();
final CharSequence result = mIC.getTextBeforeCursor(n, flags);
detectLaggyConnection(operation, startTime);
return result;
}
public CharSequence getTextAfterCursor(final int n, final int flags) {
return getTextAfterCursorAndDetectLaggyConnection(
OPERATION_GET_TEXT_AFTER_CURSOR, n, flags);
}
private CharSequence getTextAfterCursorAndDetectLaggyConnection(
final int operation, final int n, final int flags) {
mIC = mParent.getCurrentInputConnection();
return isConnected() ? mIC.getTextAfterCursor(n, flags) : null;
if (!isConnected()) {
return null;
}
final long startTime = SystemClock.uptimeMillis();
final CharSequence result = mIC.getTextAfterCursor(n, flags);
detectLaggyConnection(operation, startTime);
return result;
}
private void detectLaggyConnection(final int operation, final long startTime) {
final long duration = SystemClock.uptimeMillis() - startTime;
if (duration >= SLOW_INPUTCONNECTION_MS) {
final String operationName = OPERATION_NAMES[operation];
Log.w(TAG, "Slow InputConnection: " + operationName + " took " + duration + " ms.");
StatsUtils.onInputConnectionLaggy(operation, duration);
}
}
public void deleteTextBeforeCursor(final int beforeLength) {
@ -616,9 +662,13 @@ public final class RichInputConnection implements PrivateCommandPerformer {
if (!isConnected()) {
return null;
}
final CharSequence before = mIC.getTextBeforeCursor(NUM_CHARS_TO_GET_BEFORE_CURSOR,
final CharSequence before = getTextBeforeCursorAndDetectLaggyConnection(
OPERATION_GET_WORD_RANGE_AT_CURSOR,
NUM_CHARS_TO_GET_BEFORE_CURSOR,
InputConnection.GET_TEXT_WITH_STYLES);
final CharSequence after = mIC.getTextAfterCursor(NUM_CHARS_TO_GET_AFTER_CURSOR,
final CharSequence after = getTextBeforeCursorAndDetectLaggyConnection(
OPERATION_GET_WORD_RANGE_AT_CURSOR,
NUM_CHARS_TO_GET_AFTER_CURSOR,
InputConnection.GET_TEXT_WITH_STYLES);
if (before == null || after == null) {
return null;