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 */ 16 package androidx.emoji.widget; 17 18 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; 19 20 import android.text.Editable; 21 import android.view.inputmethod.EditorInfo; 22 import android.view.inputmethod.InputConnection; 23 import android.view.inputmethod.InputConnectionWrapper; 24 import android.widget.TextView; 25 26 import androidx.annotation.NonNull; 27 import androidx.annotation.RequiresApi; 28 import androidx.annotation.RestrictTo; 29 import androidx.emoji.text.EmojiCompat; 30 31 /** 32 * InputConnectionWrapper for EditText delete operations. Keyboard does not have knowledge about 33 * emojis and therefore might send commands to delete a part of the emoji sequence which creates 34 * invalid codeunits/getCodepointAt in the text. 35 * <p/> 36 * This class tries to correctly delete an emoji checking if there is an emoji span. 37 * 38 * @hide 39 */ 40 @RestrictTo(LIBRARY_GROUP) 41 @RequiresApi(19) 42 final class EmojiInputConnection extends InputConnectionWrapper { 43 private final TextView mTextView; 44 45 EmojiInputConnection( 46 @NonNull final TextView textView, 47 @NonNull final InputConnection inputConnection, 48 @NonNull final EditorInfo outAttrs) { 49 super(inputConnection, false); 50 mTextView = textView; 51 EmojiCompat.get().updateEditorInfoAttrs(outAttrs); 52 } 53 54 @Override 55 public boolean deleteSurroundingText(final int beforeLength, final int afterLength) { 56 final boolean result = EmojiCompat.handleDeleteSurroundingText(this, getEditable(), 57 beforeLength, afterLength, false /*inCodePoints*/); 58 return result || super.deleteSurroundingText(beforeLength, afterLength); 59 } 60 61 @Override 62 public boolean deleteSurroundingTextInCodePoints(final int beforeLength, 63 final int afterLength) { 64 final boolean result = EmojiCompat.handleDeleteSurroundingText(this, getEditable(), 65 beforeLength, afterLength, true /*inCodePoints*/); 66 return result || super.deleteSurroundingTextInCodePoints(beforeLength, afterLength); 67 } 68 69 private Editable getEditable() { 70 return mTextView.getEditableText(); 71 } 72 } 73
