1 /* 2 * Copyright (C) 2020 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 com.android.launcher3.folder; 17 18 import android.content.Context; 19 import android.util.AttributeSet; 20 import android.util.Log; 21 import android.view.inputmethod.CompletionInfo; 22 import android.view.inputmethod.EditorInfo; 23 import android.view.inputmethod.InputConnection; 24 import android.view.inputmethod.InputConnectionWrapper; 25 import android.view.inputmethod.InputMethodManager; 26 27 import com.android.launcher3.ExtendedEditText; 28 29 import java.util.List; 30 31 /** 32 * Handles additional edit text functionality to better support folder name suggestion. 33 * First, makes suggestion to the InputMethodManager via {@link #displayCompletions(List)} 34 * Second, intercepts whether user accepted the suggestion or manually edited their 35 * folder names. 36 */ 37 public class FolderNameEditText extends ExtendedEditText { 38 private static final String TAG = "FolderNameEditText"; 39 private static final boolean DEBUG = false; 40 41 private boolean mEnteredCompose = false; 42 FolderNameEditText(Context context)43 public FolderNameEditText(Context context) { 44 super(context); 45 } 46 FolderNameEditText(Context context, AttributeSet attrs)47 public FolderNameEditText(Context context, AttributeSet attrs) { 48 // ctor chaining breaks the touch handling 49 super(context, attrs); 50 } 51 FolderNameEditText(Context context, AttributeSet attrs, int defStyleAttr)52 public FolderNameEditText(Context context, AttributeSet attrs, int defStyleAttr) { 53 super(context, attrs, defStyleAttr); 54 } 55 56 @Override onCreateInputConnection(EditorInfo outAttrs)57 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 58 InputConnection con = super.onCreateInputConnection(outAttrs); 59 FolderNameEditTextInputConnection connectionWrapper = 60 new FolderNameEditTextInputConnection(con, true); 61 return connectionWrapper; 62 } 63 64 /** 65 * Send strings in @param suggestList to the IME to show up as suggestions. 66 */ displayCompletions(List<String> suggestList)67 public void displayCompletions(List<String> suggestList) { 68 int cnt = Math.min(suggestList.size(), FolderNameProvider.SUGGEST_MAX); 69 CompletionInfo[] cInfo = new CompletionInfo[cnt]; 70 for (int i = 0; i < cnt; i++) { 71 cInfo[i] = new CompletionInfo(i, i, suggestList.get(i)); 72 } 73 // post it to future frame so that onSelectionChanged, onFocusChanged, all other 74 // TextView flag change and IME animation has settled. Ideally, there should be IMM 75 // callback to notify when the IME animation and state handling is finished. 76 postDelayed(() -> getContext().getSystemService(InputMethodManager.class) 77 .displayCompletions(this, cInfo), 40 /* 2~3 frame delay */); 78 } 79 80 /** 81 * Within 's', the 'count' characters beginning at 'start' have just replaced 82 * old text 'before' 83 */ 84 @Override onTextChanged(CharSequence s, int start, int before, int count)85 public void onTextChanged(CharSequence s, int start, int before, int count) { 86 String reason = "unknown"; 87 if (start == 0 && count == 0 && before > 0) { 88 reason = "suggestion was rejected"; 89 mEnteredCompose = true; 90 } 91 if (DEBUG) { 92 Log.d(TAG, "onTextChanged " + start + "," + before + "," + count 93 + ", " + reason); 94 } 95 } 96 97 @Override onCommitCompletion(CompletionInfo text)98 public void onCommitCompletion(CompletionInfo text) { 99 setText(text.getText()); 100 setSelection(text.getText().length()); 101 mEnteredCompose = false; 102 } 103 setEnteredCompose(boolean value)104 protected void setEnteredCompose(boolean value) { 105 mEnteredCompose = value; 106 } 107 108 private class FolderNameEditTextInputConnection extends InputConnectionWrapper { 109 FolderNameEditTextInputConnection(InputConnection target, boolean mutable)110 FolderNameEditTextInputConnection(InputConnection target, boolean mutable) { 111 super(target, mutable); 112 } 113 114 @Override setComposingText(CharSequence cs, int newCursorPos)115 public boolean setComposingText(CharSequence cs, int newCursorPos) { 116 mEnteredCompose = true; 117 return super.setComposingText(cs, newCursorPos); 118 } 119 } 120 } 121