MarkdownTransformer.java
7.8 KB
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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
/*
* Decompiled with CFR 0_118.
*
* Could not load the following classes:
* com.adobe.cq.dam.cfm.ContentFragmentException
* com.petebevin.markdown.MarkdownProcessor
* org.apache.sling.xss.XSSAPI
* org.jsoup.Jsoup
* org.jsoup.nodes.Document
* org.jsoup.nodes.Element
* org.jsoup.nodes.Node
* org.jsoup.nodes.TextNode
* org.jsoup.select.NodeVisitor
*/
package com.adobe.cq.dam.cfm.impl.transformer;
import com.adobe.cq.dam.cfm.ContentFragmentException;
import com.adobe.cq.dam.cfm.impl.transformer.Transformer;
import com.petebevin.markdown.MarkdownProcessor;
import org.apache.sling.xss.XSSAPI;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.Node;
import org.jsoup.nodes.TextNode;
import org.jsoup.select.NodeVisitor;
public class MarkdownTransformer
implements Transformer {
@Override
public String getContentType() {
return "text/x-markdown";
}
@Override
public String fromHTML(String html) throws ContentFragmentException {
final StringBuilder result = new StringBuilder();
Document doc = Jsoup.parse((String)html, (String)"UTF-8");
doc.traverse(new NodeVisitor(){
int listDepth;
public void head(Node node, int depth) {
if (node instanceof TextNode) {
TextNode textNode = (TextNode)node;
result.append(textNode.text());
} else if (node instanceof Element) {
Element element = (Element)node;
HTMLTags tagName = HTMLTags.getByName(element.tagName());
switch (tagName) {
case H1: {
result.append("\n# ");
break;
}
case H2: {
result.append("\n## ");
break;
}
case H3: {
result.append("\n### ");
break;
}
case H4: {
result.append("\n#### ");
break;
}
case H5: {
result.append("\n##### ");
break;
}
case HR: {
result.append("\n***\n");
break;
}
case OL:
case UL: {
++this.listDepth;
break;
}
case LI: {
boolean numericList = element.parent().tagName().equals("ol");
for (int i = 0; i < this.listDepth - 1; ++i) {
result.append(" ");
}
result.append(numericList ? "1. " : "* ");
break;
}
case B:
case STRONG: {
result.append("**");
break;
}
case BR: {
result.append("\n");
break;
}
case I:
case EM: {
result.append("_");
break;
}
case PRE: {
result.append("```\n");
break;
}
case CODE: {
result.append("`");
break;
}
case A: {
String href = element.attr("href");
if (href == null || href.length() <= 0) break;
result.append("[");
break;
}
case IMG: {
String src = element.attr("src");
String alt = element.attr("alt");
if (src == null || src.length() <= 0) break;
if (alt == null || "".equals(alt)) {
alt = "";
}
result.append("![").append(alt).append("](").append(src).append(")\n");
break;
}
}
}
}
public void tail(Node node, int depth) {
if (node instanceof Element) {
Element element = (Element)node;
HTMLTags tagName = HTMLTags.getByName(element.tagName());
switch (tagName) {
case H1:
case H2:
case H3:
case H4:
case H5:
case LI: {
result.append("\n");
break;
}
case OL:
case UL: {
--this.listDepth;
break;
}
case B:
case STRONG: {
result.append("**");
break;
}
case I:
case EM: {
result.append("_");
break;
}
case P: {
result.append("\n\n");
break;
}
case PRE: {
result.append("\n```\n");
break;
}
case CODE: {
result.append("`");
break;
}
case A: {
String href = element.attr("href");
if (href == null || href.length() <= 0) break;
result.append(']').append('(').append(href).append(')');
break;
}
}
}
}
});
return result.toString();
}
@Override
public String toHTML(String formattedText, XSSAPI xss) throws ContentFragmentException {
MarkdownProcessor markdownProcessor = new MarkdownProcessor();
return markdownProcessor.markdown(formattedText);
}
private static enum HTMLTags {
A("A"),
H1("H1"),
H2("H2"),
H3("H3"),
H4("H4"),
H5("H5"),
HR("HR"),
B("B"),
BR("BR"),
STRONG("STRONG"),
I("I"),
EM("EM"),
P("P"),
PRE("PRE"),
CODE("CODE"),
UL("UL"),
OL("OL"),
LI("LI"),
IMG("IMG"),
NOT_SUPPORTED("");
private String tag;
private HTMLTags(String tag) {
this.tag = tag;
}
public String toString() {
return this.tag;
}
public static HTMLTags getByName(String tagName) {
HTMLTags tag;
try {
tag = HTMLTags.valueOf(tagName.toUpperCase());
}
catch (IllegalArgumentException e) {
tag = NOT_SUPPORTED;
}
return tag;
}
}
}