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1
11 package org.eclipse.jface.internal.text.revisions;
12
13
14 import java.io.IOException  ;
15 import java.io.Reader ;
16 import java.net.URL ;
17
18 import org.eclipse.swt.SWT;
19 import org.eclipse.swt.SWTError;
20 import org.eclipse.swt.graphics.RGB;
21 import org.eclipse.swt.widgets.Display;
22
23
24
27 public class HTMLPrinter {
28
29 private static RGB BG_COLOR_RGB= null;
30
31 static {
32 final Display display= Display.getDefault();
33 if (display != null && !display.isDisposed()) {
34 try {
35 display.asyncExec(new Runnable () {
36
39 public void run() {
40 BG_COLOR_RGB= display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
41 }
42 });
43 } catch (SWTError err) {
44 if (err.code != SWT.ERROR_DEVICE_DISPOSED)
46 throw err;
47 }
48 }
49 }
50
51 private HTMLPrinter() {
52 }
53
54 private static String replace(String text, char c, String s) {
55
56 int previous= 0;
57 int current= text.indexOf(c, previous);
58
59 if (current == -1)
60 return text;
61
62 StringBuffer buffer= new StringBuffer ();
63 while (current > -1) {
64 buffer.append(text.substring(previous, current));
65 buffer.append(s);
66 previous= current + 1;
67 current= text.indexOf(c, previous);
68 }
69 buffer.append(text.substring(previous));
70
71 return buffer.toString();
72 }
73
74 public static String convertToHTMLContent(String content) {
75 content= replace(content, '&', "&"); content= replace(content, '"', """); content= replace(content, '<', "<"); return replace(content, '>', ">"); }
80
81 public static String read(Reader rd) {
82
83 StringBuffer buffer= new StringBuffer ();
84 char[] readBuffer= new char[2048];
85
86 try {
87 int n= rd.read(readBuffer);
88 while (n > 0) {
89 buffer.append(readBuffer, 0, n);
90 n= rd.read(readBuffer);
91 }
92 return buffer.toString();
93 } catch (IOException x) {
94 }
95
96 return null;
97 }
98
99 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, URL styleSheetURL) {
100
101 if (bgRGB == null)
102 insertPageProlog(buffer, position, styleSheetURL);
103 else {
104 StringBuffer pageProlog= new StringBuffer (300);
105
106 pageProlog.append("<html>");
108 appendStyleSheetURL(pageProlog, styleSheetURL);
109
110 pageProlog.append("<body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
112 pageProlog.append("\">");
114 buffer.insert(position, pageProlog.toString());
115 }
116 }
117 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, String styleSheet) {
118
119 if (bgRGB == null)
120 insertPageProlog(buffer, position, styleSheet);
121 else {
122 StringBuffer pageProlog= new StringBuffer (300);
123
124 pageProlog.append("<html>");
126 appendStyleSheetURL(pageProlog, styleSheet);
127
128 pageProlog.append("<body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
130 pageProlog.append("\">");
132 buffer.insert(position, pageProlog.toString());
133 }
134 }
135
136 public static void insertStyles(StringBuffer buffer, String [] styles) {
137 if (styles == null || styles.length == 0)
138 return;
139
140 StringBuffer styleBuf= new StringBuffer (10 * styles.length);
141 for (int i= 0; styles != null && i < styles.length; i++) {
142 styleBuf.append(" style=\""); styleBuf.append(styles[i]);
144 styleBuf.append('"');
145 }
146
147 int index= buffer.indexOf("<body "); if (index == -1)
150 return;
151
152 buffer.insert(index+5, styleBuf);
153 }
154
155 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
156 if (bgRGB == null)
157 insertPageProlog(buffer, position);
158 else {
159 StringBuffer pageProlog= new StringBuffer (60);
160 pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
162 pageProlog.append("\">"); buffer.insert(position, pageProlog.toString());
164 }
165 }
166
167 private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
168 if (styleSheet == null)
169 return;
170
171 buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); buffer.append(styleSheet);
173 buffer.append("</style></head>"); }
175
176 private static void appendStyleSheetURL(StringBuffer buffer, URL styleSheetURL) {
177 if (styleSheetURL == null)
178 return;
179
180 buffer.append("<head>");
182 buffer.append("<LINK REL=\"stylesheet\" HREF= \""); buffer.append(styleSheetURL);
184 buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">");
186 buffer.append("</head>"); }
188
189 private static void appendColor(StringBuffer buffer, RGB rgb) {
190 buffer.append('#');
191 buffer.append(Integer.toHexString(rgb.red));
192 buffer.append(Integer.toHexString(rgb.green));
193 buffer.append(Integer.toHexString(rgb.blue));
194 }
195
196 public static void insertPageProlog(StringBuffer buffer, int position) {
197 insertPageProlog(buffer, position, getBgColor());
198 }
199
200 public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
201 insertPageProlog(buffer, position, getBgColor(), styleSheetURL);
202 }
203
204 public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
205 insertPageProlog(buffer, position, getBgColor(), styleSheet);
206 }
207
208 private static RGB getBgColor() {
209 if (BG_COLOR_RGB != null)
210 return BG_COLOR_RGB;
211 return new RGB(255,255, 225);
213 }
214
215 public static void addPageProlog(StringBuffer buffer) {
216 insertPageProlog(buffer, buffer.length());
217 }
218
219 public static void addPageEpilog(StringBuffer buffer) {
220 buffer.append("</font></body></html>"); }
222
223 public static void startBulletList(StringBuffer buffer) {
224 buffer.append("<ul>"); }
226
227 public static void endBulletList(StringBuffer buffer) {
228 buffer.append("</ul>"); }
230
231 public static void addBullet(StringBuffer buffer, String bullet) {
232 if (bullet != null) {
233 buffer.append("<li>"); buffer.append(bullet);
235 buffer.append("</li>"); }
237 }
238
239 public static void addSmallHeader(StringBuffer buffer, String header) {
240 if (header != null) {
241 buffer.append("<h5>"); buffer.append(header);
243 buffer.append("</h5>"); }
245 }
246
247 public static void addParagraph(StringBuffer buffer, String paragraph) {
248 if (paragraph != null) {
249 buffer.append("<p>"); buffer.append(paragraph);
251 }
252 }
253
254 public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
255 if (paragraphReader != null)
256 addParagraph(buffer, read(paragraphReader));
257 }
258 }
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