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1
11 package org.eclipse.jface.internal.text.html;
12
13 import java.io.IOException  ;
14 import java.io.Reader ;
15 import java.net.URL ;
16
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.SWTError;
19 import org.eclipse.swt.graphics.FontData;
20 import org.eclipse.swt.graphics.RGB;
21 import org.eclipse.swt.widgets.Display;
22
23
24
29 public class HTMLPrinter {
30
31 private static RGB BG_COLOR_RGB= null;
32
33 static {
34 final Display display= Display.getDefault();
35 if (display != null && !display.isDisposed()) {
36 try {
37 display.asyncExec(new Runnable () {
38
41 public void run() {
42 BG_COLOR_RGB= display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
43 }
44 });
45 } catch (SWTError err) {
46 if (err.code != SWT.ERROR_DEVICE_DISPOSED)
48 throw err;
49 }
50 }
51 }
52
53 private HTMLPrinter() {
54 }
55
56 private static String replace(String text, char c, String s) {
57
58 int previous= 0;
59 int current= text.indexOf(c, previous);
60
61 if (current == -1)
62 return text;
63
64 StringBuffer buffer= new StringBuffer ();
65 while (current > -1) {
66 buffer.append(text.substring(previous, current));
67 buffer.append(s);
68 previous= current + 1;
69 current= text.indexOf(c, previous);
70 }
71 buffer.append(text.substring(previous));
72
73 return buffer.toString();
74 }
75
76 public static String convertToHTMLContent(String content) {
77 content= replace(content, '&', "&"); content= replace(content, '"', """); content= replace(content, '<', "<"); return replace(content, '>', ">"); }
82
83 public static String read(Reader rd) {
84
85 StringBuffer buffer= new StringBuffer ();
86 char[] readBuffer= new char[2048];
87
88 try {
89 int n= rd.read(readBuffer);
90 while (n > 0) {
91 buffer.append(readBuffer, 0, n);
92 n= rd.read(readBuffer);
93 }
94 return buffer.toString();
95 } catch (IOException x) {
96 }
97
98 return null;
99 }
100
101 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, URL styleSheetURL) {
102
103 if (bgRGB == null)
104 insertPageProlog(buffer, position, styleSheetURL);
105 else {
106 StringBuffer pageProlog= new StringBuffer (300);
107
108 pageProlog.append("<html>");
110 appendStyleSheetURL(pageProlog, styleSheetURL);
111
112 pageProlog.append("<body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
114 pageProlog.append("\">");
116 buffer.insert(position, pageProlog.toString());
117 }
118 }
119 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB, String styleSheet) {
120
121 if (bgRGB == null)
122 insertPageProlog(buffer, position, styleSheet);
123 else {
124 StringBuffer pageProlog= new StringBuffer (300);
125
126 pageProlog.append("<html>");
128 appendStyleSheetURL(pageProlog, styleSheet);
129
130 pageProlog.append("<body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
132 pageProlog.append("\">");
134 buffer.insert(position, pageProlog.toString());
135 }
136 }
137
138 public static void insertStyles(StringBuffer buffer, String [] styles) {
139 if (styles == null || styles.length == 0)
140 return;
141
142 StringBuffer styleBuf= new StringBuffer (10 * styles.length);
143 for (int i= 0; styles != null && i < styles.length; i++) {
144 styleBuf.append(" style=\""); styleBuf.append(styles[i]);
146 styleBuf.append('"');
147 }
148
149 int index= buffer.indexOf("<body "); if (index != -1) {
153 buffer.insert(index+5, styleBuf);
154 return;
155 }
156
157 index= buffer.indexOf("<body>"); if (index != -1) {
160 buffer.insert(index+5, ' ');
161 buffer.insert(index+6, styleBuf);
162 return;
163 }
164 }
165
166 public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
167 if (bgRGB == null)
168 insertPageProlog(buffer, position);
169 else {
170 StringBuffer pageProlog= new StringBuffer (60);
171 pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); appendColor(pageProlog, bgRGB);
173 pageProlog.append("\">"); buffer.insert(position, pageProlog.toString());
175 }
176 }
177
178 private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
179 if (styleSheet == null)
180 return;
181
182 buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); buffer.append(styleSheet);
184 buffer.append("</style></head>"); }
186
187 private static void appendStyleSheetURL(StringBuffer buffer, URL styleSheetURL) {
188 if (styleSheetURL == null)
189 return;
190
191 buffer.append("<head>");
193 buffer.append("<LINK REL=\"stylesheet\" HREF= \""); buffer.append(styleSheetURL);
195 buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">");
197 buffer.append("</head>"); }
199
200 private static void appendColor(StringBuffer buffer, RGB rgb) {
201 buffer.append('#');
202 buffer.append(Integer.toHexString(rgb.red));
203 buffer.append(Integer.toHexString(rgb.green));
204 buffer.append(Integer.toHexString(rgb.blue));
205 }
206
207 public static void insertPageProlog(StringBuffer buffer, int position) {
208 insertPageProlog(buffer, position, getBgColor());
209 }
210
211 public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
212 insertPageProlog(buffer, position, getBgColor(), styleSheetURL);
213 }
214
215 public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
216 insertPageProlog(buffer, position, getBgColor(), styleSheet);
217 }
218
219 private static RGB getBgColor() {
220 if (BG_COLOR_RGB != null)
221 return BG_COLOR_RGB;
222 return new RGB(255,255, 225);
224 }
225
226 public static void addPageProlog(StringBuffer buffer) {
227 insertPageProlog(buffer, buffer.length());
228 }
229
230 public static void addPageEpilog(StringBuffer buffer) {
231 buffer.append("</font></body></html>"); }
233
234 public static void startBulletList(StringBuffer buffer) {
235 buffer.append("<ul>"); }
237
238 public static void endBulletList(StringBuffer buffer) {
239 buffer.append("</ul>"); }
241
242 public static void addBullet(StringBuffer buffer, String bullet) {
243 if (bullet != null) {
244 buffer.append("<li>"); buffer.append(bullet);
246 buffer.append("</li>"); }
248 }
249
250 public static void addSmallHeader(StringBuffer buffer, String header) {
251 if (header != null) {
252 buffer.append("<h5>"); buffer.append(header);
254 buffer.append("</h5>"); }
256 }
257
258 public static void addParagraph(StringBuffer buffer, String paragraph) {
259 if (paragraph != null) {
260 buffer.append("<p>"); buffer.append(paragraph);
262 }
263 }
264
265 public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
266 if (paragraphReader != null)
267 addParagraph(buffer, read(paragraphReader));
268 }
269
270
290 public static String convertTopLevelFont(String styles, FontData fontData) {
291 boolean bold= (fontData.getStyle() & SWT.BOLD) != 0;
292 boolean italic= (fontData.getStyle() & SWT.ITALIC) != 0;
293
294 String size= Integer.toString(fontData.getHeight()) + ("carbon".equals(SWT.getPlatform()) ? "px" : "pt");
297 String family= "'" + fontData.getName() + "',sans-serif"; styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-size:\\s*)\\d+pt(\\;?.*\\})", "$1" + size + "$2"); styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-weight:\\s*)\\w+(\\;?.*\\})", "$1" + (bold ? "bold" : "normal") + "$2"); styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-style:\\s*)\\w+(\\;?.*\\})", "$1" + (italic ? "italic" : "normal") + "$2"); styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-family:\\s*).+?(;.*\\})", "$1" + family + "$2"); return styles;
303 }
304 }
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