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
|
/*
* 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 org.mozilla.thirdparty.com.google.android.exoplayer2.text.ttml;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.AlignmentSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.TypefaceSpan;
import android.text.style.UnderlineSpan;
import java.util.Map;
/**
* Package internal utility class to render styled <code>TtmlNode</code>s.
*/
/* package */ final class TtmlRenderUtil {
public static TtmlStyle resolveStyle(TtmlStyle style, String[] styleIds,
Map<String, TtmlStyle> globalStyles) {
if (style == null && styleIds == null) {
// No styles at all.
return null;
} else if (style == null && styleIds.length == 1) {
// Only one single referential style present.
return globalStyles.get(styleIds[0]);
} else if (style == null && styleIds.length > 1) {
// Only multiple referential styles present.
TtmlStyle chainedStyle = new TtmlStyle();
for (String id : styleIds) {
chainedStyle.chain(globalStyles.get(id));
}
return chainedStyle;
} else if (style != null && styleIds != null && styleIds.length == 1) {
// Merge a single referential style into inline style.
return style.chain(globalStyles.get(styleIds[0]));
} else if (style != null && styleIds != null && styleIds.length > 1) {
// Merge multiple referential styles into inline style.
for (String id : styleIds) {
style.chain(globalStyles.get(id));
}
return style;
}
// Only inline styles available.
return style;
}
public static void applyStylesToSpan(SpannableStringBuilder builder,
int start, int end, TtmlStyle style) {
if (style.getStyle() != TtmlStyle.UNSPECIFIED) {
builder.setSpan(new StyleSpan(style.getStyle()), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.isLinethrough()) {
builder.setSpan(new StrikethroughSpan(), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.isUnderline()) {
builder.setSpan(new UnderlineSpan(), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.hasFontColor()) {
builder.setSpan(new ForegroundColorSpan(style.getFontColor()), start, end,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.hasBackgroundColor()) {
builder.setSpan(new BackgroundColorSpan(style.getBackgroundColor()), start, end,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.getFontFamily() != null) {
builder.setSpan(new TypefaceSpan(style.getFontFamily()), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (style.getTextAlign() != null) {
builder.setSpan(new AlignmentSpan.Standard(style.getTextAlign()), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
switch (style.getFontSizeUnit()) {
case TtmlStyle.FONT_SIZE_UNIT_PIXEL:
builder.setSpan(new AbsoluteSizeSpan((int) style.getFontSize(), true), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case TtmlStyle.FONT_SIZE_UNIT_EM:
builder.setSpan(new RelativeSizeSpan(style.getFontSize()), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case TtmlStyle.FONT_SIZE_UNIT_PERCENT:
builder.setSpan(new RelativeSizeSpan(style.getFontSize() / 100), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case TtmlStyle.UNSPECIFIED:
// Do nothing.
break;
}
}
/**
* Called when the end of a paragraph is encountered. Adds a newline if there are one or more
* non-space characters since the previous newline.
*
* @param builder The builder.
*/
/* package */ static void endParagraph(SpannableStringBuilder builder) {
int position = builder.length() - 1;
while (position >= 0 && builder.charAt(position) == ' ') {
position--;
}
if (position >= 0 && builder.charAt(position) != '\n') {
builder.append('\n');
}
}
/**
* Applies the appropriate space policy to the given text element.
*
* @param in The text element to which the policy should be applied.
* @return The result of applying the policy to the text element.
*/
/* package */ static String applyTextElementSpacePolicy(String in) {
// Removes carriage return followed by line feed. See: http://www.w3.org/TR/xml/#sec-line-ends
String out = in.replaceAll("\r\n", "\n");
// Apply suppress-at-line-break="auto" and
// white-space-treatment="ignore-if-surrounding-linefeed"
out = out.replaceAll(" *\n *", "\n");
// Apply linefeed-treatment="treat-as-space"
out = out.replaceAll("\n", " ");
// Apply white-space-collapse="true"
out = out.replaceAll("[ \t\\x0B\f\r]+", " ");
return out;
}
private TtmlRenderUtil() {}
}
|
