1 /*
2  * Copyright (C) 2015 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;
17 
18 import android.content.Context;
19 import android.util.AttributeSet;
20 import android.view.DragEvent;
21 import android.view.KeyEvent;
22 import android.view.inputmethod.InputMethodManager;
23 import android.widget.EditText;
24 
25 
26 /**
27  * The edit text that reports back when the back key has been pressed.
28  */
29 public class ExtendedEditText extends EditText {
30 
31     private boolean mShowImeAfterFirstLayout;
32     private boolean mForceDisableSuggestions = false;
33 
34     /**
35      * Implemented by listeners of the back key.
36      */
37     public interface OnBackKeyListener {
onBackKey()38         public boolean onBackKey();
39     }
40 
41     private OnBackKeyListener mBackKeyListener;
42 
ExtendedEditText(Context context)43     public ExtendedEditText(Context context) {
44         // ctor chaining breaks the touch handling
45         super(context);
46     }
47 
ExtendedEditText(Context context, AttributeSet attrs)48     public ExtendedEditText(Context context, AttributeSet attrs) {
49         // ctor chaining breaks the touch handling
50         super(context, attrs);
51     }
52 
ExtendedEditText(Context context, AttributeSet attrs, int defStyleAttr)53     public ExtendedEditText(Context context, AttributeSet attrs, int defStyleAttr) {
54         super(context, attrs, defStyleAttr);
55     }
56 
setOnBackKeyListener(OnBackKeyListener listener)57     public void setOnBackKeyListener(OnBackKeyListener listener) {
58         mBackKeyListener = listener;
59     }
60 
61     @Override
onKeyPreIme(int keyCode, KeyEvent event)62     public boolean onKeyPreIme(int keyCode, KeyEvent event) {
63         // If this is a back key, propagate the key back to the listener
64         if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
65             if (mBackKeyListener != null) {
66                 return mBackKeyListener.onBackKey();
67             }
68             return false;
69         }
70         return super.onKeyPreIme(keyCode, event);
71     }
72 
73     @Override
onDragEvent(DragEvent event)74     public boolean onDragEvent(DragEvent event) {
75         // We don't want this view to interfere with Launcher own drag and drop.
76         return false;
77     }
78 
79     @Override
onLayout(boolean changed, int left, int top, int right, int bottom)80     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
81         super.onLayout(changed, left, top, right, bottom);
82         if (mShowImeAfterFirstLayout) {
83             // soft input only shows one frame after the layout of the EditText happens,
84             post(new Runnable() {
85                 @Override
86                 public void run() {
87                     showSoftInput();
88                     mShowImeAfterFirstLayout = false;
89                 }
90             });
91         }
92     }
93 
showKeyboard()94     public void showKeyboard() {
95         mShowImeAfterFirstLayout = !showSoftInput();
96     }
97 
showSoftInput()98     private boolean showSoftInput() {
99         return requestFocus() &&
100                 ((InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE))
101                     .showSoftInput(this, InputMethodManager.SHOW_IMPLICIT);
102     }
103 
dispatchBackKey()104     public void dispatchBackKey() {
105         ((InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE))
106                 .hideSoftInputFromWindow(getWindowToken(), 0);
107         if (mBackKeyListener != null) {
108             mBackKeyListener.onBackKey();
109         }
110     }
111 
112     /**
113      * Set to true when you want isSuggestionsEnabled to return false.
114      * Use this to disable the red underlines that appear under typos when suggestions is enabled.
115      */
forceDisableSuggestions(boolean forceDisableSuggestions)116     public void forceDisableSuggestions(boolean forceDisableSuggestions) {
117         mForceDisableSuggestions = forceDisableSuggestions;
118     }
119 
120     @Override
isSuggestionsEnabled()121     public boolean isSuggestionsEnabled() {
122         return !mForceDisableSuggestions && super.isSuggestionsEnabled();
123     }
124 }
125