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Add a compatibility utility class for TextInfo

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This is a groundwork for enabling LocaleSpan support in spell
checker service. TextInfo#getCharSequence is supposed to be
available in API Level 21 and later. We need some abstraction
layer as usual.

BUG: 16029304
Change-Id: Iafbf2877db393dbd040295c21d429334e3a13a5f
This commit is contained in:
Yohei Yukawa 2014-07-07 23:36:23 +09:00
parent a315903fb1
commit 733ec699cd
2 changed files with 144 additions and 0 deletions
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59
java/src/com/android/inputmethod/compat/TextInfoCompatUtils.java Normal file
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/*
* Copyright (C) 2014 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.compat;
import android.view.textservice.TextInfo;
import com.android.inputmethod.annotations.UsedForTesting;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Locale;
@UsedForTesting
public final class TextInfoCompatUtils {
// Note that TextInfo.getCharSequence() is supposed to be available in API level 21 and later.
private static final Method TEXT_INFO_GET_CHAR_SEQUENCE =
CompatUtils.getMethod(TextInfo.class, "getCharSequence");
private static final Constructor<?> TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE =
CompatUtils.getConstructor(TextInfo.class, CharSequence.class, int.class, int.class,
int.class, int.class);
@UsedForTesting
public static boolean isCharSequenceSupported() {
return TEXT_INFO_GET_CHAR_SEQUENCE != null &&
TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE != null;
}
@UsedForTesting
public static TextInfo newInstance(CharSequence charSequence, int start, int end, int cookie,
int sequenceNumber) {
if (TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE != null) {
return (TextInfo) CompatUtils.newInstance(TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE,
charSequence, start, end, cookie, sequenceNumber);
}
return new TextInfo(charSequence.subSequence(start, end).toString(), cookie,
sequenceNumber);
}
@UsedForTesting
public static CharSequence getCharSequence(final TextInfo textInfo,
final CharSequence defaultValue) {
return (CharSequence) CompatUtils.invoke(textInfo, defaultValue,
TEXT_INFO_GET_CHAR_SEQUENCE);
}
}

85
tests/src/com/android/inputmethod/compat/TextInfoCompatUtilsTests.java Normal file
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/*
* Copyright (C) 2014 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.compat;
import android.graphics.Typeface;
import android.os.Parcel;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.StyleSpan;
import android.text.style.URLSpan;
import android.view.textservice.TextInfo;
import java.util.Arrays;
@SmallTest
public class TextInfoCompatUtilsTests extends AndroidTestCase {
final private static String TEST_TEXT = "0123456789";
final private static int TEST_COOKIE = 0x1234;
final private static int TEST_SEQUENCE_NUMBER = 0x4321;
final private static int TEST_CHAR_SEQUENCE_START = 1;
final private static int TEST_CHAR_SEQUENCE_END = 6;
final private static StyleSpan TEST_STYLE_SPAN = new StyleSpan(Typeface.BOLD);
final private static int TEST_STYLE_SPAN_START = 4;
final private static int TEST_STYLE_SPAN_END = 5;
final private static int TEST_STYLE_SPAN_FLAGS = Spanned.SPAN_EXCLUSIVE_INCLUSIVE;
final private static URLSpan TEST_URL_SPAN_URL = new URLSpan("http://example.com");
final private static int TEST_URL_SPAN_START = 3;
final private static int TEST_URL_SPAN_END = 7;
final private static int TEST_URL_SPAN_FLAGS = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
public void testGetCharSequence() {
final SpannableString text = new SpannableString(TEST_TEXT);
text.setSpan(TEST_STYLE_SPAN, TEST_STYLE_SPAN_START, TEST_STYLE_SPAN_END,
TEST_STYLE_SPAN_FLAGS);
text.setSpan(TEST_URL_SPAN_URL, TEST_URL_SPAN_START, TEST_URL_SPAN_END,
TEST_URL_SPAN_FLAGS);
final TextInfo textInfo = TextInfoCompatUtils.newInstance(text,
TEST_CHAR_SEQUENCE_START, TEST_CHAR_SEQUENCE_END, TEST_COOKIE,
TEST_SEQUENCE_NUMBER);
final Spanned expectedSpanned = (Spanned) text.subSequence(TEST_CHAR_SEQUENCE_START,
TEST_CHAR_SEQUENCE_END);
final CharSequence actualCharSequence = TextInfoCompatUtils.getCharSequence(textInfo, null);
// This should be valid even if TextInfo#getCharSequence is not supported.
assertTrue(TextUtils.equals(expectedSpanned, actualCharSequence));
if (TextInfoCompatUtils.isCharSequenceSupported()) {
// This is valid only if TextInfo#getCharSequence is supported.
assertTrue("should be Spanned", actualCharSequence instanceof Spanned);
assertTrue(Arrays.equals(marshall(expectedSpanned), marshall(actualCharSequence)));
}
}
private static byte[] marshall(final CharSequence cahrSequence) {
Parcel parcel = null;
try {
parcel = Parcel.obtain();
TextUtils.writeToParcel(cahrSequence, parcel, 0);
return parcel.marshall();
} finally {
if (parcel != null) {
parcel.recycle();
parcel = null;
}
}
}
}