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
  14 import java.io.IOException;
  15 import java.io.Reader;
  16
  17 import org.eclipse.swt.SWT;
  18 import org.eclipse.swt.graphics.RGB;
  19 import org.eclipse.swt.widgets.Display;
  20 import org.eclipse.ui.IWorkbenchWindow;
  21 import org.eclipse.ui.PlatformUI;
  22
  23
  24 /**
  25  * Provides a set of convenience methods for creating HTML pages.
  26  */
  27 public class HTMLPrinter {
  28
  29         private HTMLPrinter() {
  30         }
  31
  32         private static String replace(String text, char c, String s) {
  33
  34                 int previous= 0;
  35                 int current= text.indexOf(c, previous);
  36
  37                 if (current == -1)
  38                         return text;
  39
  40                 StringBuffer buffer= new StringBuffer();
  41                 while (current > -1) {
  42                         buffer.append(text.substring(previous, current));
  43                         buffer.append(s);
  44                         previous= current + 1;
  45                         current= text.indexOf(c, previous);
  46                 }
  47                 buffer.append(text.substring(previous));
  48
  49                 return buffer.toString();
  50         }
  51
  52         public static String convertToHTMLContent(String content) {
  53                 content= replace(content, '<', "&lt;"); //$NON-NLS-1$
  54                 return replace(content, '>', "&gt;"); //$NON-NLS-1$
  55         }
  56
  57         public static String read(Reader rd) {
  58
  59                 StringBuffer buffer= new StringBuffer();
  60                 char[] readBuffer= new char[2048];
  61
  62                 try {
  63                         int n= rd.read(readBuffer);
  64                         while (n > 0) {
  65                                 buffer.append(readBuffer, 0, n);
  66                                 n= rd.read(readBuffer);
  67                         }
  68                         return buffer.toString();
  69                 } catch (IOException x) {
  70                 }
  71
  72                 return null;
  73         }
  74
  75         public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
  76                 if (bgRGB == null)
  77                         insertPageProlog(buffer, position);
  78                 else {
  79                         StringBuffer pageProlog= new StringBuffer(60);
  80                         pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
  81                         appendColor(pageProlog, bgRGB);
  82                         pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$
  83                         buffer.insert(position,  pageProlog.toString());
  84                 }
  85         }
  86
  87         private static void appendColor(StringBuffer buffer, RGB rgb) {
  88                 buffer.append('#');
  89                 buffer.append(Integer.toHexString(rgb.red));
  90                 buffer.append(Integer.toHexString(rgb.green));
  91                 buffer.append(Integer.toHexString(rgb.blue));
  92         }
  93
  94         public static void insertPageProlog(StringBuffer buffer, int position) {
  95                 RGB bgColor= null;
  96                 IWorkbenchWindow window= PlatformUI.getWorkbench().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).getRGB();
 101                 }
 102                 if (bgColor == null)
 103                         bgColor= new RGB(255,255, 225); // RGB value of info bg color on WindowsXP
 104
 105                 insertPageProlog(buffer, position, bgColor); //$NON-NLS-1$
 106         }
 107
 108         public static void addPageProlog(StringBuffer buffer) {
 109                 insertPageProlog(buffer, buffer.length());
 110         }
 111
 112         public static void addPageEpilog(StringBuffer buffer) {
 113                 buffer.append("</font></body></html>"); //$NON-NLS-1$
 114         }
 115
 116         public static void startBulletList(StringBuffer buffer) {
 117                 buffer.append("<ul>"); //$NON-NLS-1$
 118         }
 119
 120         public static void endBulletList(StringBuffer buffer) {
 121                 buffer.append("</ul>"); //$NON-NLS-1$
 122         }
 123
 124         public static void addBullet(StringBuffer buffer, String bullet) {
 125                 if (bullet != null) {
 126                         buffer.append("<li>"); //$NON-NLS-1$
 127                         buffer.append(bullet);
 128                         buffer.append("</li>"); //$NON-NLS-1$
 129                 }
 130         }
 131
 132         public static void addSmallHeader(StringBuffer buffer, String header) {
 133                 if (header != null) {
 134                         buffer.append("<h5>"); //$NON-NLS-1$
 135                         buffer.append(header);
 136                         buffer.append("</h5>"); //$NON-NLS-1$
 137                 }
 138         }
 139
 140         public static void addParagraph(StringBuffer buffer, String paragraph) {
 141                 if (paragraph != null) {
 142                         buffer.append("<p>"); //$NON-NLS-1$
 143                         buffer.append(paragraph);
 144                 }
 145         }
 146
 147         public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
 148                 if (paragraphReader != null)
 149                         addParagraph(buffer, read(paragraphReader));
 150         }
 151 }