1 import java.awt.Color;
2 import java.util.Set;
3
4 import javax.swing.JTextPane;
5 import javax.swing.SwingUtilities;
6 import javax.swing.event.DocumentEvent;
7 import javax.swing.event.DocumentListener;
8 import javax.swing.text.AttributeSet;
9 import javax.swing.text.BadLocationException;
10 import javax.swing.text.Document;
11 import javax.swing.text.MutableAttributeSet;
12 import javax.swing.text.SimpleAttributeSet;
13 import javax.swing.text.Style;
14 import javax.swing.text.StyleConstants;
15 import javax.swing.text.StyledDocument;
16
17 /**
18 * 自定义的JTextPane，扩展了JTextPane没有的一些功能（java关键字、单行注释、多行注释加亮）
19 *
20 * @author myafluy@gmail.com
21 * @since 2013-08-17
22 *
23 */
24
25 public class MyJTextPane extends JTextPane implements DocumentListener {
26 private Set<String> keywords;
27 private Style keywordStyle;
28 private Style normalStyle;
29 private Style classNameStyle;
30
31 public MyJTextPane() {
32 super();
33 this.getDocument().addDocumentListener(this);
34 // 准备着色使用的样式
35 keywordStyle = ((StyledDocument) getDocument()).addStyle(
36 "Keyword_Style", null);
37 normalStyle = ((StyledDocument) getDocument()).addStyle(
38 "Keyword_Style", null);
39
40 StyleConstants.setForeground(keywordStyle, Color.RED);
41
42 StyleConstants.setForeground(normalStyle, Color.BLACK);
43
44 //获取关键字
45 keywords = KeyWordSet.getKeyWordSet();
46 System.out.println(keywords.size());
47
48 }
49
50 /**
51 * 设置全文本属性
52 *
53 * @param attr
54 * @param replace
55 */
56 public void setTextAttributes(AttributeSet attr, boolean replace) {
57 int p0 = 0;
58 int p1 = this.getText().length();
59 if (p0 != p1) {
60 StyledDocument doc = getStyledDocument();
61 doc.setCharacterAttributes(p0, p1 - p0, attr, replace);
62 } else {
63 MutableAttributeSet inputAttributes = getInputAttributes();
64 if (replace) {
65 inputAttributes.removeAttributes(inputAttributes);
66 }
67 inputAttributes.addAttributes(attr);
68 }
69 }
70
71 /**
72 * 单行注释
73 */
74 public void setSingleLineNoteCharacterAttributes() {
75 String text = this.getText();
76 int startPointer = 0;
77 int endPointer = 0;
78 if ((startPointer = text.indexOf("//")) == -1) {
79 return;
80 }
81
82 while ((endPointer = text.substring(startPointer).indexOf("\n")) != -1) {
83 endPointer = startPointer + endPointer;
84 if (startPointer >= endPointer) {
85 break;
86 }
87 int hangshu = text.substring(0, endPointer).split("\\n").length;
88 System.out.println("hangshu:" + hangshu);
89 SwingUtilities
90 .invokeLater(new ColouringWord(this, startPointer - hangshu
91 + 1, endPointer - hangshu, new Color(63, 217, 95)));
92 startPointer = text.substring(endPointer + 1).indexOf("//");
93 startPointer = startPointer + endPointer + 1;
94
95 }
96 }
97
98 /**
99 * 多行注释
100 */
101 public void setMultiLineNoteCharacterAttributes() {
102 String text = this.getText();
103 int startPointer = 0;
104 int endPointer = 0;
105 if ((startPointer = text.indexOf("/*")) == -1) {
106 return;
107 }
108
109 while ((endPointer = text.substring(startPointer).indexOf("*/")) != -1) {
110 endPointer = startPointer + endPointer;
111 if (startPointer >= endPointer) {
112 break;
113 }
114 int hangshu = text.substring(0, endPointer).split("\\n").length;
115 int kuaju = text.substring(startPointer, endPointer).split("\\n").length;
116 SwingUtilities.invokeLater(new ColouringWord(this, startPointer
117 - hangshu + kuaju, endPointer + 3 - hangshu, new Color(63,
118 217, 95)));
119 startPointer = text.substring(endPointer + 1).indexOf("/*");
120 startPointer = startPointer + endPointer + 1;
121
122 }
123 }
124
125 /**
126 * 实时加亮关键字
127 * @param styledDocument
128 * @param pos
129 * @param len
130 * @throws BadLocationException
131 */
132 public void myColouring(StyledDocument styledDocument, int pos, int len)
133 throws BadLocationException {
134 int start = indexOfWordStart(styledDocument, pos);
135 int end = indexOfWordEnd(styledDocument, pos + len);
136
137 char ch;
138 while (start < end) {
139 ch = getCharAt(styledDocument, start);
140 if (Character.isLetter(ch) || ch == '_') {//判断是否为字母
141 start = myColouringWord(styledDocument, start);
142 } else {
143 SwingUtilities.invokeLater(new ColouringTask(styledDocument,
144 start, 1, normalStyle));
145 ++start;
146 }
147 }
148 }
149
150 /**
151 * 实时着色
152 *
153 * @param doc
154 * @param pos
155 * @return
156 * @throws BadLocationException
157 */
158 public int myColouringWord(StyledDocument doc, int pos)
159 throws BadLocationException {
160 int wordEnd = indexOfWordEnd(doc, pos);
161 String word = doc.getText(pos, wordEnd - pos);
162
163 if (keywords.contains(word)) {
164 SwingUtilities.invokeLater(new ColouringTask(doc, pos, wordEnd
165 - pos, keywordStyle));
166 } else {
167 SwingUtilities.invokeLater(new ColouringTask(doc, pos, wordEnd
168 - pos, normalStyle));
169 }
170
171 return wordEnd;
172 }
173
174 /**
175 * 取得在文档中下标在pos处的字符.
176 *
177 * @param doc
178 * @param pos
179 * @return
180 * @throws BadLocationException
181 */
182 public char getCharAt(Document doc, int pos) throws BadLocationException {
183 return doc.getText(pos, 1).charAt(0);
184 }
185
186 /**
187 * 取得下标为pos时, 它所在的单词开始的下标.
188 *
189 * @param doc
190 * @param pos
191 * @return
192 * @throws BadLocationException
193 */
194 public int indexOfWordStart(Document doc, int pos)
195 throws BadLocationException {
196 // 从pos开始向前找到第一个非单词字符.
197 for (; pos > 0 && isWordCharacter(doc, pos - 1); --pos)
198 ;
199
200 return pos;
201 }
202
203 /**
204 * 取得下标为pos时, 它所在的单词结束的下标.
205 *
206 * @param doc
207 * @param pos
208 * @return
209 * @throws BadLocationException
210 */
211 public int indexOfWordEnd(Document doc, int pos)
212 throws BadLocationException {
213 // 从pos开始向前找到第一个非单词字符.
214 for (; isWordCharacter(doc, pos); ++pos)
215 ;
216
217 return pos;
218 }
219
220 /**
221 * 如果一个字符是字母, 数字, 下划线, 则返回true.
222 *
223 * @param doc
224 * @param pos
225 * @return
226 * @throws BadLocationException
227 */
228 public boolean isWordCharacter(Document doc, int pos)
229 throws BadLocationException {
230 char ch = getCharAt(doc, pos);
231 if (Character.isLetter(ch) || Character.isDigit(ch) || ch == '_') {
232 return true;
233 }
234 return false;
235 }
236
237 @Override
238 // 给出属性或属性集发生了更改的通知
239 public void changedUpdate(DocumentEvent e) {
240
241 }
242
243 @Override
244 // 给出对文档执行了插入操作的通知
245 public void insertUpdate(DocumentEvent e) {
246 try {
247 myColouring((StyledDocument) e.getDocument(), e.getOffset(),
248 e.getLength());
249 // noteFinder.ColorNote(this.getText());// 给注释上色
250 setSingleLineNoteCharacterAttributes();
251 setMultiLineNoteCharacterAttributes();
252 } catch (BadLocationException e1) {
253 e1.printStackTrace();
254 }
255 }
256
257 @Override
258 // 给出移除了一部分文档的通知
259 public void removeUpdate(DocumentEvent e) {
260 try {
261 // 因为删除后光标紧接着影响的单词两边, 所以长度就不需要了
262 myColouring((StyledDocument) e.getDocument(), e.getOffset(), 0);
263 // noteFinder.ColorNote(this.getText());// 给注释上色
264 setSingleLineNoteCharacterAttributes();
265 setMultiLineNoteCharacterAttributes();
266 } catch (BadLocationException e1) {
267 e1.printStackTrace();
268 }
269 }
270
271 /**
272 * 多线程绘制颜色
273 *
274 *
275 *
276 */
277 private class ColouringTask implements Runnable {
278 private StyledDocument doc;
279 private Style style;
280 private int pos;
281 private int len;
282
283 public ColouringTask(StyledDocument doc, int pos, int len, Style style) {
284 this.doc = doc;
285 this.pos = pos;
286 this.len = len;
287 this.style = style;
288 }
289
290 public void run() {
291 try {
292 // 这里就是对字符进行着色
293 doc.setCharacterAttributes(pos, len, style, false);
294 } catch (Exception e) {
295 }
296 }
297 }
298
299 }
300
301 /**
302 * 多线程绘制颜色
303 *
304 *
305 *
306 */
307 class ColouringWord implements Runnable {
308 private int startPointer;
309 private int endPointer;
310 private Color color;
311 private JTextPane jTextPane;
312
313 public ColouringWord(JTextPane jTextPane, int pos, int len, Color color) {
314 this.jTextPane = jTextPane;
315 this.startPointer = pos;
316 this.endPointer = len;
317 this.color = color;
318 }
319
320 @Override
321 public void run() {
322 SimpleAttributeSet attributeSet = new SimpleAttributeSet();
323 StyleConstants.setForeground(attributeSet, color);
324 boolean replace = false;
325 int p0 = startPointer;
326 int p1 = endPointer;
327 if (p0 != p1) {
328 StyledDocument doc = jTextPane.getStyledDocument();
329 doc.setCharacterAttributes(p0, p1 - p0, attributeSet, replace);
330 } else {
331 MutableAttributeSet inputAttributes = jTextPane
332 .getInputAttributes();
333 if (replace) {
334 inputAttributes.removeAttributes(inputAttributes);
335 }
336 inputAttributes.addAttributes(attributeSet);
337 }
338 }
339 }
