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comparison dwtx/jface/internal/text/html/HTMLPrinter.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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128:8df1d4193877 129:eb30df5ca28b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.jface.internal.text.html.HTMLPrinter;
14
15 import dwt.dwthelper.utils;
16
17 import java.io.IOException;
18 import java.io.Reader;
19 import java.net.URL;
20
21 import dwt.DWT;
22 import dwt.DWTError;
23 import dwt.graphics.FontData;
24 import dwt.graphics.RGB;
25 import dwt.widgets.Display;
26
27
28 /**
29 * Provides a set of convenience methods for creating HTML pages.
30 * <p>
31 * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p>
32 */
33 public class HTMLPrinter {
34
35 private static RGB BG_COLOR_RGB= new RGB(255, 255, 225); // RGB value of info bg color on WindowsXP
36 private static RGB FG_COLOR_RGB= new RGB(0, 0, 0); // RGB value of info fg color on WindowsXP
37
38
39 static {
40 final Display display= Display.getDefault();
41 if (display !is null && !display.isDisposed()) {
42 try {
43 display.asyncExec(new Runnable() {
44 /*
45 * @see java.lang.Runnable#run()
46 */
47 public void run() {
48 BG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_BACKGROUND).getRGB();
49 FG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_FOREGROUND).getRGB();
50 }
51 });
52 } catch (DWTError err) {
53 // see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
54 if (err.code !is DWT.ERROR_DEVICE_DISPOSED)
55 throw err;
56 }
57 }
58 }
59
60 private HTMLPrinter() {
61 }
62
63 private static String replace(String text, char c, String s) {
64
65 int previous= 0;
66 int current= text.indexOf(c, previous);
67
68 if (current is -1)
69 return text;
70
71 StringBuffer buffer= new StringBuffer();
72 while (current > -1) {
73 buffer.append(text.substring(previous, current));
74 buffer.append(s);
75 previous= current + 1;
76 current= text.indexOf(c, previous);
77 }
78 buffer.append(text.substring(previous));
79
80 return buffer.toString();
81 }
82
83 public static String convertToHTMLContent(String content) {
84 content= replace(content, '&', "&amp;"); //$NON-NLS-1$
85 content= replace(content, '"', "&quot;"); //$NON-NLS-1$
86 content= replace(content, '<', "&lt;"); //$NON-NLS-1$
87 return replace(content, '>', "&gt;"); //$NON-NLS-1$
88 }
89
90 public static String read(Reader rd) {
91
92 StringBuffer buffer= new StringBuffer();
93 char[] readBuffer= new char[2048];
94
95 try {
96 int n= rd.read(readBuffer);
97 while (n > 0) {
98 buffer.append(readBuffer, 0, n);
99 n= rd.read(readBuffer);
100 }
101 return buffer.toString();
102 } catch (IOException x) {
103 }
104
105 return null;
106 }
107
108 public static void insertPageProlog(StringBuffer buffer, int position, RGB fgRGB, RGB bgRGB, String styleSheet) {
109 if (fgRGB is null)
110 fgRGB= FG_COLOR_RGB;
111 if (bgRGB is null)
112 bgRGB= BG_COLOR_RGB;
113
114 StringBuffer pageProlog= new StringBuffer(300);
115
116 pageProlog.append("<html>"); //$NON-NLS-1$
117
118 appendStyleSheetURL(pageProlog, styleSheet);
119
120 appendColors(pageProlog, fgRGB, bgRGB);
121
122 buffer.insert(position, pageProlog.toString());
123 }
124
125 private static void appendColors(StringBuffer pageProlog, RGB fgRGB, RGB bgRGB) {
126 pageProlog.append("<body text=\""); //$NON-NLS-1$
127 appendColor(pageProlog, fgRGB);
128 pageProlog.append("\" bgcolor=\""); //$NON-NLS-1$
129 appendColor(pageProlog, bgRGB);
130 pageProlog.append("\">"); //$NON-NLS-1$
131 }
132
133 private static void appendColor(StringBuffer buffer, RGB rgb) {
134 buffer.append('#');
135 appendAsHexString(buffer, rgb.red);
136 appendAsHexString(buffer, rgb.green);
137 appendAsHexString(buffer, rgb.blue);
138 }
139
140 private static void appendAsHexString(StringBuffer buffer, int intValue) {
141 String hexValue= Integer.toHexString(intValue);
142 if (hexValue.length() is 1)
143 buffer.append('0');
144 buffer.append(hexValue);
145 }
146
147 public static void insertStyles(StringBuffer buffer, String[] styles) {
148 if (styles is null || styles.length is 0)
149 return;
150
151 StringBuffer styleBuf= new StringBuffer(10 * styles.length);
152 for (int i= 0; styles !is null && i < styles.length; i++) {
153 styleBuf.append(" style=\""); //$NON-NLS-1$
154 styleBuf.append(styles[i]);
155 styleBuf.append('"');
156 }
157
158 // Find insertion index
159 // a) within existing body tag with trailing space
160 int index= buffer.indexOf("<body "); //$NON-NLS-1$
161 if (index !is -1) {
162 buffer.insert(index+5, styleBuf);
163 return;
164 }
165
166 // b) within existing body tag without attributes
167 index= buffer.indexOf("<body>"); //$NON-NLS-1$
168 if (index !is -1) {
169 buffer.insert(index+5, ' ');
170 buffer.insert(index+6, styleBuf);
171 return;
172 }
173 }
174
175 private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
176 if (styleSheet is null)
177 return;
178
179 buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
180 buffer.append(styleSheet);
181 buffer.append("</style></head>"); //$NON-NLS-1$
182 }
183
184 private static void appendStyleSheetURL(StringBuffer buffer, URL styleSheetURL) {
185 if (styleSheetURL is null)
186 return;
187
188 buffer.append("<head>"); //$NON-NLS-1$
189
190 buffer.append("<LINK REL=\"stylesheet\" HREF= \""); //$NON-NLS-1$
191 buffer.append(styleSheetURL);
192 buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
193
194 buffer.append("</head>"); //$NON-NLS-1$
195 }
196
197 public static void insertPageProlog(StringBuffer buffer, int position) {
198 StringBuffer pageProlog= new StringBuffer(60);
199 pageProlog.append("<html>"); //$NON-NLS-1$
200 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
201 buffer.insert(position, pageProlog.toString());
202 }
203
204 public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
205 StringBuffer pageProlog= new StringBuffer(300);
206 pageProlog.append("<html>"); //$NON-NLS-1$
207 appendStyleSheetURL(pageProlog, styleSheetURL);
208 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
209 buffer.insert(position, pageProlog.toString());
210 }
211
212 public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
213 insertPageProlog(buffer, position, null, null, styleSheet);
214 }
215
216 public static void addPageProlog(StringBuffer buffer) {
217 insertPageProlog(buffer, buffer.length());
218 }
219
220 public static void addPageEpilog(StringBuffer buffer) {
221 buffer.append("</font></body></html>"); //$NON-NLS-1$
222 }
223
224 public static void startBulletList(StringBuffer buffer) {
225 buffer.append("<ul>"); //$NON-NLS-1$
226 }
227
228 public static void endBulletList(StringBuffer buffer) {
229 buffer.append("</ul>"); //$NON-NLS-1$
230 }
231
232 public static void addBullet(StringBuffer buffer, String bullet) {
233 if (bullet !is null) {
234 buffer.append("<li>"); //$NON-NLS-1$
235 buffer.append(bullet);
236 buffer.append("</li>"); //$NON-NLS-1$
237 }
238 }
239
240 public static void addSmallHeader(StringBuffer buffer, String header) {
241 if (header !is null) {
242 buffer.append("<h5>"); //$NON-NLS-1$
243 buffer.append(header);
244 buffer.append("</h5>"); //$NON-NLS-1$
245 }
246 }
247
248 public static void addParagraph(StringBuffer buffer, String paragraph) {
249 if (paragraph !is null) {
250 buffer.append("<p>"); //$NON-NLS-1$
251 buffer.append(paragraph);
252 }
253 }
254
255 public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
256 if (paragraphReader !is null)
257 addParagraph(buffer, read(paragraphReader));
258 }
259
260 /**
261 * Replaces the following style attributes of the font definition of the <code>html</code>
262 * element:
263 * <ul>
264 * <li>font-size</li>
265 * <li>font-weight</li>
266 * <li>font-style</li>
267 * <li>font-family</li>
268 * </ul>
269 * The font's name is used as font family, a <code>sans-serif</code> default font family is
270 * appended for the case that the given font name is not available.
271 * <p>
272 * If the listed font attributes are not contained in the passed style list, nothing happens.
273 * </p>
274 *
275 * @param styles CSS style definitions
276 * @param fontData the font information to use
277 * @return the modified style definitions
278 * @since 3.3
279 */
280 public static String convertTopLevelFont(String styles, FontData fontData) {
281 bool bold= (fontData.getStyle() & DWT.BOLD) !is 0;
282 bool italic= (fontData.getStyle() & DWT.ITALIC) !is 0;
283
284 // See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=155993
285 String size= Integer.toString(fontData.getHeight()) + ("carbon".equals(DWT.getPlatform()) ? "px" : "pt"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
286
287 String family= "'" + fontData.getName() + "',sans-serif"; //$NON-NLS-1$ //$NON-NLS-2$
288 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-size:\\s*)\\d+pt(\\;?.*\\})", "$1" + size + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
289 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-weight:\\s*)\\w+(\\;?.*\\})", "$1" + (bold ? "bold" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
290 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-style:\\s*)\\w+(\\;?.*\\})", "$1" + (italic ? "italic" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
291 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-family:\\s*).+?(;.*\\})", "$1" + family + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
292 return styles;
293 }
294 }