1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Copyright (C) 2021 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.inputmethodservice;
import static android.view.WindowManager.LayoutParams;
import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
import android.annotation.NonNull;
import android.content.Context;
import android.os.IBinder;
import android.util.Slog;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.WindowManager;
import com.android.internal.policy.PhoneWindow;
/**
* Window of type {@code LayoutParams.TYPE_INPUT_METHOD_DIALOG} for drawing
* Handwriting Ink on screen.
* @hide
*/
final class InkWindow extends PhoneWindow {
private final WindowManager mWindowManager;
private boolean mIsViewAdded;
private View mInkView;
private InkVisibilityListener mInkViewVisibilityListener;
private ViewTreeObserver.OnGlobalLayoutListener mGlobalLayoutListener;
public InkWindow(@NonNull Context context) {
super(context);
setType(LayoutParams.TYPE_INPUT_METHOD);
final LayoutParams attrs = getAttributes();
attrs.layoutInDisplayCutoutMode = LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
attrs.setFitInsetsTypes(0);
// TODO(b/210039666): use INPUT_FEATURE_NO_INPUT_CHANNEL once b/216179339 is fixed.
setAttributes(attrs);
// Ink window is not touchable with finger.
addFlags(FLAG_LAYOUT_IN_SCREEN | FLAG_LAYOUT_NO_LIMITS | FLAG_NOT_TOUCHABLE
| FLAG_NOT_FOCUSABLE);
setBackgroundDrawableResource(android.R.color.transparent);
setLayout(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
mWindowManager = context.getSystemService(WindowManager.class);
}
/**
* Initialize InkWindow if we only want to create and draw surface but not show it.
*/
void initOnly() {
show(true /* keepInvisible */);
}
/**
* Method to show InkWindow on screen.
* Emulates internal behavior similar to Dialog.show().
*/
void show() {
show(false /* keepInvisible */);
}
private void show(boolean keepInvisible) {
if (getDecorView() == null) {
Slog.i(InputMethodService.TAG, "DecorView is not set for InkWindow. show() failed.");
return;
}
getDecorView().setVisibility(keepInvisible ? View.INVISIBLE : View.VISIBLE);
if (!mIsViewAdded) {
mWindowManager.addView(getDecorView(), getAttributes());
mIsViewAdded = true;
}
}
/**
* Method to hide InkWindow from screen.
* Emulates internal behavior similar to Dialog.hide().
* @param remove set {@code true} to remove InkWindow surface completely.
*/
void hide(boolean remove) {
if (getDecorView() != null) {
getDecorView().setVisibility(remove ? View.GONE : View.INVISIBLE);
}
//TODO(b/210039666): remove window from WM after a delay. Delay amount TBD.
}
void setToken(@NonNull IBinder token) {
WindowManager.LayoutParams lp = getAttributes();
lp.token = token;
setAttributes(lp);
}
@Override
public void addContentView(View view, ViewGroup.LayoutParams params) {
if (mInkView == null) {
mInkView = view;
} else if (mInkView != view) {
throw new IllegalStateException("Only one Child Inking view is permitted.");
}
super.addContentView(view, params);
initInkViewVisibilityListener();
}
@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
mInkView = view;
super.setContentView(view, params);
initInkViewVisibilityListener();
}
@Override
public void setContentView(View view) {
mInkView = view;
super.setContentView(view);
initInkViewVisibilityListener();
}
@Override
public void clearContentView() {
if (mGlobalLayoutListener != null && mInkView != null) {
mInkView.getViewTreeObserver().removeOnGlobalLayoutListener(mGlobalLayoutListener);
}
mGlobalLayoutListener = null;
mInkView = null;
super.clearContentView();
}
/**
* Listener used by InkWindow to time the dispatching of {@link MotionEvent}s to Ink view, once
* it is visible to user.
*/
interface InkVisibilityListener {
void onInkViewVisible();
}
void setInkViewVisibilityListener(InkVisibilityListener listener) {
mInkViewVisibilityListener = listener;
initInkViewVisibilityListener();
}
void initInkViewVisibilityListener() {
if (mInkView == null || mInkViewVisibilityListener == null
|| mGlobalLayoutListener != null) {
return;
}
mGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (mInkView.isVisibleToUser()) {
if (mInkViewVisibilityListener != null) {
mInkViewVisibilityListener.onInkViewVisible();
}
mInkView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
mGlobalLayoutListener = null;
}
}
};
mInkView.getViewTreeObserver().addOnGlobalLayoutListener(mGlobalLayoutListener);
}
boolean isInkViewVisible() {
return getDecorView().getVisibility() == View.VISIBLE
&& mInkView != null && mInkView.isVisibleToUser();
}
}
|
