| /* |
| * Copyright (C) 2016 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 android.view.inputmethod.cts.util; |
| |
| import android.text.Selection; |
| import android.text.SpannableStringBuilder; |
| |
| public final class InputConnectionTestUtils { |
| |
| private static final String U1F427 = "\uD83D\uDC27"; |
| |
| /** |
| * A utility function to generate test string for input method APIs. There are several |
| * pre-defined meta characters that are useful for unit tests. |
| * |
| * <p>Pre-defined meta characters:</p> |
| * <dl> |
| * <dl>{@code [}</dl><dd>The text selection starts from here.</dd> |
| * <dl>{@code ]}</dl><dd>The text selection ends at here.</dd> |
| * <dl>{@code <}</dl><dd>Represents a high surrogate character.</dd> |
| * <dl>{@code >}</dl><dd>Represents a low surrogate character.</dd> |
| * </ul> |
| * |
| * <p>Examples: {@code "012[3<>67]89"} will be converted to {@ode "0123HL6789"}, where |
| * {@code "H"} and {@code "L"} indicate certain high and low surrogate characters, respectively, |
| * with selecting {@code "3HL67"}.</p> |
| * |
| * @param formatString |
| * @return A {@link CharSequence} object with text selection specified by the meta characters. |
| */ |
| public static CharSequence formatString(final String formatString) { |
| final SpannableStringBuilder builder = new SpannableStringBuilder(); |
| int selectionStart = -1; |
| int selectionEnd = -1; |
| for (int i = 0; i < formatString.length(); ++i) { |
| final Character c = formatString.charAt(i); |
| switch (c) { |
| case '[': |
| selectionStart = builder.length(); |
| break; |
| case ']': |
| selectionEnd = builder.length(); |
| break; |
| case '<': |
| builder.append(U1F427.charAt(0)); // High surrogate |
| break; |
| case '>': |
| builder.append(U1F427.charAt(1)); // Low surrogate |
| break; |
| default: |
| builder.append(c); |
| break; |
| } |
| } |
| if (selectionStart < 0) { |
| throw new UnsupportedOperationException("Selection marker '[' must be specified."); |
| } |
| if (selectionEnd < 0) { |
| throw new UnsupportedOperationException("Selection marker ']' must be specified."); |
| } |
| Selection.setSelection(builder, selectionStart, selectionEnd); |
| return builder; |
| } |
| } |