net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/HTMLPrinter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.text;
  12
  13 import java.io.IOException;
  14 import java.io.Reader;
  15
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.graphics.RGB;
  18 import org.eclipse.swt.widgets.Display;
  19 import org.eclipse.ui.IWorkbenchWindow;
  20 import org.eclipse.ui.PlatformUI;
  21
  22 /**
  23  * Provides a set of convenience methods for creating HTML pages.
  24  */
  25 public class HTMLPrinter {
  26
  27         private HTMLPrinter() {
  28         }
  29
  30         private static String replace(String text, char c, String s) {
  31
  32                 int previous = 0;
  33                 int current = text.indexOf(c, previous);
  34
  35                 if (current == -1)
  36                         return text;
  37
  38                 StringBuffer buffer = new StringBuffer();
  39                 while (current > -1) {
  40                         buffer.append(text.substring(previous, current));
  41                         buffer.append(s);
  42                         previous = current + 1;
  43                         current = text.indexOf(c, previous);
  44                 }
  45                 buffer.append(text.substring(previous));
  46
  47                 return buffer.toString();
  48         }
  49
  50         public static String convertToHTMLContent(String content) {
  51                 content = replace(content, '<', "&lt;"); //$NON-NLS-1$
  52                 return replace(content, '>', "&gt;"); //$NON-NLS-1$
  53         }
  54
  55         public static String read(Reader rd) {
  56
  57                 StringBuffer buffer = new StringBuffer();
  58                 char[] readBuffer = new char[2048];
  59
  60                 try {
  61                         int n = rd.read(readBuffer);
  62                         while (n > 0) {
  63                                 buffer.append(readBuffer, 0, n);
  64                                 n = rd.read(readBuffer);
  65                         }
  66                         return buffer.toString();
  67                 } catch (IOException x) {
  68                 }
  69
  70                 return null;
  71         }
  72
  73         public static void insertPageProlog(StringBuffer buffer, int position,
  74                         RGB bgRGB) {
  75                 if (bgRGB == null)
  76                         insertPageProlog(buffer, position);
  77                 else {
  78                         StringBuffer pageProlog = new StringBuffer(60);
  79                         pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
  80                         appendColor(pageProlog, bgRGB);
  81                         pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$
  82                         buffer.insert(position, pageProlog.toString());
  83                 }
  84         }
  85
  86         private static void appendColor(StringBuffer buffer, RGB rgb) {
  87                 buffer.append('#');
  88                 buffer.append(Integer.toHexString(rgb.red));
  89                 buffer.append(Integer.toHexString(rgb.green));
  90                 buffer.append(Integer.toHexString(rgb.blue));
  91         }
  92
  93         public static void insertPageProlog(StringBuffer buffer, int position) {
  94                 RGB bgColor = null;
  95                 IWorkbenchWindow window = PlatformUI.getWorkbench()
  96                                 .getActiveWorkbenchWindow();
  97                 if (window != null) {
  98                         Display display = window.getShell().getDisplay();
  99                         if (display != null && !display.isDisposed())
 100                                 bgColor = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND)
 101                                                 .getRGB();
 102                 }
 103                 if (bgColor == null)
 104                         bgColor = new RGB(255, 255, 225); // RGB value of info bg color on
 105                                                                                                 // WindowsXP
 106
 107                 insertPageProlog(buffer, position, bgColor); //$NON-NLS-1$
 108         }
 109
 110         public static void addPageProlog(StringBuffer buffer) {
 111                 insertPageProlog(buffer, buffer.length());
 112         }
 113
 114         public static void addPageEpilog(StringBuffer buffer) {
 115                 buffer.append("</font></body></html>"); //$NON-NLS-1$
 116         }
 117
 118         public static void startBulletList(StringBuffer buffer) {
 119                 buffer.append("<ul>"); //$NON-NLS-1$
 120         }
 121
 122         public static void endBulletList(StringBuffer buffer) {
 123                 buffer.append("</ul>"); //$NON-NLS-1$
 124         }
 125
 126         public static void addBullet(StringBuffer buffer, String bullet) {
 127                 if (bullet != null) {
 128                         buffer.append("<li>"); //$NON-NLS-1$
 129                         buffer.append(bullet);
 130                         buffer.append("</li>"); //$NON-NLS-1$
 131                 }
 132         }
 133
 134         public static void addSmallHeader(StringBuffer buffer, String header) {
 135                 if (header != null) {
 136                         buffer.append("<h5>"); //$NON-NLS-1$
 137                         buffer.append(header);
 138                         buffer.append("</h5>"); //$NON-NLS-1$
 139                 }
 140         }
 141
 142         public static void addParagraph(StringBuffer buffer, String paragraph) {
 143                 if (paragraph != null) {
 144                         buffer.append("<p>"); //$NON-NLS-1$
 145                         buffer.append(paragraph);
 146                 }
 147         }
 148
 149         public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
 150                 if (paragraphReader != null)
 151                         addParagraph(buffer, read(paragraphReader));
 152         }
 153 }