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Diffstat (limited to 'src/com/android/messaging/util/TextUtil.java')
-rw-r--r-- | src/com/android/messaging/util/TextUtil.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/com/android/messaging/util/TextUtil.java b/src/com/android/messaging/util/TextUtil.java new file mode 100644 index 0000000..b240396 --- /dev/null +++ b/src/com/android/messaging/util/TextUtil.java @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2015 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.messaging.util; + +import android.support.annotation.Nullable; + +public class TextUtil { + /** + * Returns true if the string is empty, null or only whitespace. + */ + public static boolean isAllWhitespace(@Nullable String string) { + if (string == null || string.isEmpty()) { + return true; + } + + for (int i = 0; i < string.length(); ++i) { + if (!Character.isWhitespace(string.charAt(i))) { + return false; + } + } + + return true; + } + + /** + * Taken from PhoneNumberUtils, where it is only available in API 21+ Replaces all unicode + * (e.g. Arabic, Persian) digits with their decimal digit equivalents. + * + * @param number the number to perform the replacement on. + * @return the replaced number. + */ + public static String replaceUnicodeDigits(String number) { + StringBuilder normalizedDigits = new StringBuilder(number.length()); + for (char c : number.toCharArray()) { + int digit = Character.digit(c, 10); + if (digit != -1) { + normalizedDigits.append(digit); + } else { + normalizedDigits.append(c); + } + } + return normalizedDigits.toString(); + } + + /** + * Appends text to the stringBuilder. + * If stringBuilder already has content, separator is prepended to create a separator between + * entries. + * @param stringBuilder The stringBuilder to add to + * @param text The text to append + * @param separator The separator to add if there is already text, typically "," or "\n" + */ + public static void appendWithSeparator(final StringBuilder stringBuilder, final String text, + final String separator) { + if (stringBuilder.length() > 0) { + stringBuilder.append(separator); + } + stringBuilder.append(text); + } +} |