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
|
/*
* Copyright (C) 2016 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 com.android.setupwizardlib.view;
import android.content.Context;
import android.support.v4.view.ViewCompat;
import android.text.Annotation;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.TextAppearanceSpan;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.TextView;
import com.android.setupwizardlib.span.LinkSpan;
import com.android.setupwizardlib.span.SpanHelper;
import com.android.setupwizardlib.util.LinkAccessibilityHelper;
/**
* An extension of TextView that automatically replaces the annotation tags as specified in
* {@link SpanHelper#replaceSpan(android.text.Spannable, Object, Object)}
*/
public class RichTextView extends TextView {
/* static section */
private static final String TAG = "RichTextView";
private static final String ANNOTATION_LINK = "link";
private static final String ANNOTATION_TEXT_APPEARANCE = "textAppearance";
/**
* Replace <annotation> tags in strings to become their respective types. Currently 2
* types are supported:
* <ol>
* <li><annotation link="foobar"> will create a
* {@link com.android.setupwizardlib.span.LinkSpan} that broadcasts with the key
* "foobar"</li>
* <li><annotation textAppearance="TextAppearance.FooBar"> will create a
* {@link android.text.style.TextAppearanceSpan} with @style/TextAppearance.FooBar</li>
* </ol>
*/
public static CharSequence getRichText(Context context, CharSequence text) {
if (text instanceof Spanned) {
final SpannableString spannable = new SpannableString(text);
final Annotation[] spans = spannable.getSpans(0, spannable.length(), Annotation.class);
for (Annotation span : spans) {
final String key = span.getKey();
if (ANNOTATION_TEXT_APPEARANCE.equals(key)) {
String textAppearance = span.getValue();
final int style = context.getResources()
.getIdentifier(textAppearance, "style", context.getPackageName());
if (style == 0) {
Log.w(TAG, "Cannot find resource: " + style);
}
final TextAppearanceSpan textAppearanceSpan =
new TextAppearanceSpan(context, style);
SpanHelper.replaceSpan(spannable, span, textAppearanceSpan);
} else if (ANNOTATION_LINK.equals(key)) {
LinkSpan link = new LinkSpan(span.getValue());
SpanHelper.replaceSpan(spannable, span, link);
}
}
return spannable;
}
return text;
}
/* non-static section */
private LinkAccessibilityHelper mAccessibilityHelper;
public RichTextView(Context context) {
super(context);
init();
}
public RichTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
mAccessibilityHelper = new LinkAccessibilityHelper(this);
ViewCompat.setAccessibilityDelegate(this, mAccessibilityHelper);
setMovementMethod(LinkMovementMethod.getInstance());
}
@Override
public void setText(CharSequence text, BufferType type) {
text = getRichText(getContext(), text);
super.setText(text, type);
}
@Override
protected boolean dispatchHoverEvent(MotionEvent event) {
if (mAccessibilityHelper != null && mAccessibilityHelper.dispatchHoverEvent(event)) {
return true;
}
return super.dispatchHoverEvent(event);
}
}
|
