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
|
/*
* Copyright (C) 2020 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.widget;
import static android.view.OnReceiveContentCallback.Payload.FLAG_CONVERT_TO_PLAIN_TEXT;
import static android.view.OnReceiveContentCallback.Payload.SOURCE_AUTOFILL;
import static android.view.OnReceiveContentCallback.Payload.SOURCE_DRAG_AND_DROP;
import android.annotation.NonNull;
import android.annotation.SuppressLint;
import android.content.ClipData;
import android.content.Context;
import android.text.Editable;
import android.text.Selection;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.util.Log;
import android.view.OnReceiveContentCallback;
import android.view.OnReceiveContentCallback.Payload.Flags;
import android.view.OnReceiveContentCallback.Payload.Source;
import java.util.Collections;
import java.util.Set;
/**
* Default implementation of {@link android.view.OnReceiveContentCallback} for editable
* {@link TextView} components. This class handles insertion of text (plain text, styled text, HTML,
* etc) but not images or other content. This class can be used as a base class for an
* implementation of {@link android.view.OnReceiveContentCallback} for a {@link TextView}, to
* provide consistent behavior for insertion of text.
*/
public class TextViewOnReceiveContentCallback implements OnReceiveContentCallback<TextView> {
private static final String LOG_TAG = "OnReceiveContentCallback";
private static final Set<String> MIME_TYPES_ALL_TEXT = Collections.singleton("text/*");
@SuppressLint("CallbackMethodName")
@NonNull
@Override
public Set<String> getSupportedMimeTypes(@NonNull TextView view) {
return MIME_TYPES_ALL_TEXT;
}
@Override
public boolean onReceiveContent(@NonNull TextView view, @NonNull Payload payload) {
if (Log.isLoggable(LOG_TAG, Log.DEBUG)) {
Log.d(LOG_TAG, "onReceive:" + payload);
}
ClipData clip = payload.getClip();
@Source int source = payload.getSource();
@Flags int flags = payload.getFlags();
if (source == SOURCE_AUTOFILL) {
return onReceiveForAutofill(view, clip, flags);
}
if (source == SOURCE_DRAG_AND_DROP) {
return onReceiveForDragAndDrop(view, clip, flags);
}
// The code here follows the original paste logic from TextView:
// https://cs.android.com/android/_/android/platform/frameworks/base/+/9fefb65aa9e7beae9ca8306b925b9fbfaeffecc9:core/java/android/widget/TextView.java;l=12644
// In particular, multiple items within the given ClipData will trigger separate calls to
// replace/insert. This is to preserve the original behavior with respect to TextWatcher
// notifications fired from SpannableStringBuilder when replace/insert is called.
final Editable editable = (Editable) view.getText();
final Context context = view.getContext();
boolean didFirst = false;
for (int i = 0; i < clip.getItemCount(); i++) {
CharSequence itemText;
if ((flags & FLAG_CONVERT_TO_PLAIN_TEXT) != 0) {
itemText = clip.getItemAt(i).coerceToText(context);
itemText = (itemText instanceof Spanned) ? itemText.toString() : itemText;
} else {
itemText = clip.getItemAt(i).coerceToStyledText(context);
}
if (itemText != null) {
if (!didFirst) {
replaceSelection(editable, itemText);
didFirst = true;
} else {
editable.insert(Selection.getSelectionEnd(editable), "\n");
editable.insert(Selection.getSelectionEnd(editable), itemText);
}
}
}
return true;
}
private static void replaceSelection(@NonNull Editable editable,
@NonNull CharSequence replacement) {
final int selStart = Selection.getSelectionStart(editable);
final int selEnd = Selection.getSelectionEnd(editable);
final int start = Math.max(0, Math.min(selStart, selEnd));
final int end = Math.max(0, Math.max(selStart, selEnd));
Selection.setSelection(editable, end);
editable.replace(start, end, replacement);
}
private static boolean onReceiveForAutofill(@NonNull TextView textView, @NonNull ClipData clip,
@Flags int flags) {
final CharSequence text = coerceToText(clip, textView.getContext(), flags);
// First autofill it...
textView.setText(text);
// ...then move cursor to the end.
final Editable editable = (Editable) textView.getText();
Selection.setSelection(editable, editable.length());
return true;
}
private static boolean onReceiveForDragAndDrop(@NonNull TextView textView,
@NonNull ClipData clip, @Flags int flags) {
final CharSequence text = coerceToText(clip, textView.getContext(), flags);
if (text.length() == 0) {
return true;
}
replaceSelection((Editable) textView.getText(), text);
return true;
}
private static CharSequence coerceToText(ClipData clip, Context context, @Flags int flags) {
SpannableStringBuilder ssb = new SpannableStringBuilder();
for (int i = 0; i < clip.getItemCount(); i++) {
CharSequence itemText;
if ((flags & FLAG_CONVERT_TO_PLAIN_TEXT) != 0) {
itemText = clip.getItemAt(i).coerceToText(context);
itemText = (itemText instanceof Spanned) ? itemText.toString() : itemText;
} else {
itemText = clip.getItemAt(i).coerceToStyledText(context);
}
if (itemText != null) {
ssb.append(itemText);
}
}
return ssb;
}
}
|
