1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16package android.support.text.emoji.widget; 17 18import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 19 20import android.support.annotation.NonNull; 21import android.support.annotation.RequiresApi; 22import android.support.annotation.RestrictTo; 23import android.support.text.emoji.EmojiCompat; 24import android.text.Editable; 25import android.view.inputmethod.EditorInfo; 26import android.view.inputmethod.InputConnection; 27import android.view.inputmethod.InputConnectionWrapper; 28import android.widget.TextView; 29 30/** 31 * InputConnectionWrapper for EditText delete operations. Keyboard does not have knowledge about 32 * emojis and therefore might send commands to delete a part of the emoji sequence which creates 33 * invalid codeunits/getCodepointAt in the text. 34 * <p/> 35 * This class tries to correctly delete an emoji checking if there is an emoji span. 36 * 37 * @hide 38 */ 39@RestrictTo(LIBRARY_GROUP) 40@RequiresApi(19) 41final class EmojiInputConnection extends InputConnectionWrapper { 42 private final TextView mTextView; 43 44 EmojiInputConnection( 45 @NonNull final TextView textView, 46 @NonNull final InputConnection inputConnection, 47 @NonNull final EditorInfo outAttrs) { 48 super(inputConnection, false); 49 mTextView = textView; 50 EmojiCompat.get().updateEditorInfoAttrs(outAttrs); 51 } 52 53 @Override 54 public boolean deleteSurroundingText(final int beforeLength, final int afterLength) { 55 final boolean result = EmojiCompat.handleDeleteSurroundingText(this, getEditable(), 56 beforeLength, afterLength, false /* in code ponints */); 57 return result || super.deleteSurroundingText(beforeLength, afterLength); 58 } 59 60 @Override 61 public boolean deleteSurroundingTextInCodePoints(final int beforeLength, 62 final int afterLength) { 63 final boolean result = EmojiCompat.handleDeleteSurroundingText(this, getEditable(), 64 beforeLength, afterLength, true /* in code ponints */); 65 return result || super.deleteSurroundingTextInCodePoints(beforeLength, afterLength); 66 } 67 68 private Editable getEditable() { 69 return mTextView.getEditableText(); 70 } 71} 72