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
  21 import org.eclipse.ui.IWorkbenchWindow;
  22 import org.eclipse.ui.PlatformUI;
  23
  24
  25 /**
  26  * Provides a set of convenience methods for creating HTML pages.
  27  */
  28 public class HTMLPrinter {
  29
  30         private HTMLPrinter() {
  31         }
  32
  33         private static String replace(String text, char c, String s) {
  34
  35                 int previous= 0;
  36                 int current= text.indexOf(c, previous);
  37
  38                 if (current == -1)
  39                         return text;
  40
  41                 StringBuffer buffer= new StringBuffer();
  42                 while (current > -1) {
  43                         buffer.append(text.substring(previous, current));
  44                         buffer.append(s);
  45                         previous= current + 1;
  46                         current= text.indexOf(c, previous);
  47                 }
  48                 buffer.append(text.substring(previous));
  49
  50                 return buffer.toString();
  51         }
  52
  53         public static String convertToHTMLContent(String content) {
  54                 content= replace(content, '<', "&lt;"); //$NON-NLS-1$
  55                 return replace(content, '>', "&gt;"); //$NON-NLS-1$
  56         }
  57
  58         public static String read(Reader rd) {
  59
  60                 StringBuffer buffer= new StringBuffer();
  61                 char[] readBuffer= new char[2048];
  62
  63                 try {
  64                         int n= rd.read(readBuffer);
  65                         while (n > 0) {
  66                                 buffer.append(readBuffer, 0, n);
  67                                 n= rd.read(readBuffer);
  68                         }
  69                         return buffer.toString();
  70                 } catch (IOException x) {
  71                 }
  72
  73                 return null;
  74         }
  75
  76         public static void insertPageProlog(StringBuffer buffer, int position, RGB bgRGB) {
  77                 if (bgRGB == null)
  78                         insertPageProlog(buffer, position);
  79                 else {
  80                         StringBuffer pageProlog= new StringBuffer(60);
  81                         pageProlog.append("<html><body text=\"#000000\" bgcolor=\""); //$NON-NLS-1$
  82                         appendColor(pageProlog, bgRGB);
  83                         pageProlog.append("\"><font size=-1>"); //$NON-NLS-1$
  84                         buffer.insert(position,  pageProlog.toString());
  85                 }
  86         }
  87
  88         private static void appendColor(StringBuffer buffer, RGB rgb) {
  89                 buffer.append('#');
  90                 buffer.append(Integer.toHexString(rgb.red));
  91                 buffer.append(Integer.toHexString(rgb.green));
  92                 buffer.append(Integer.toHexString(rgb.blue));
  93         }
  94
  95         public static void insertPageProlog(StringBuffer buffer, int position) {
  96                 RGB bgColor= null;
  97                 IWorkbenchWindow window= PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  98                 if (window != null) {
  99                         Display display= window.getShell().getDisplay();
 100                         if (display != null && !display.isDisposed())
 101                                 bgColor= display.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
 102                 }
 103                 if (bgColor == null)
 104                         bgColor= new RGB(255,255, 225); // RGB value of info bg color on WindowsXP
 105
 106                 insertPageProlog(buffer, position, bgColor); //$NON-NLS-1$
 107         }
 108
 109         public static void addPageProlog(StringBuffer buffer) {
 110                 insertPageProlog(buffer, buffer.length());
 111         }
 112
 113         public static void addPageEpilog(StringBuffer buffer) {
 114                 buffer.append("</font></body></html>"); //$NON-NLS-1$
 115         }
 116
 117         public static void startBulletList(StringBuffer buffer) {
 118                 buffer.append("<ul>"); //$NON-NLS-1$
 119         }
 120
 121         public static void endBulletList(StringBuffer buffer) {
 122                 buffer.append("</ul>"); //$NON-NLS-1$
 123         }
 124
 125         public static void addBullet(StringBuffer buffer, String bullet) {
 126                 if (bullet != null) {
 127                         buffer.append("<li>"); //$NON-NLS-1$
 128                         buffer.append(bullet);
 129                         buffer.append("</li>"); //$NON-NLS-1$
 130                 }
 131         }
 132
 133         public static void addSmallHeader(StringBuffer buffer, String header) {
 134                 if (header != null) {
 135                         buffer.append("<h5>"); //$NON-NLS-1$
 136                         buffer.append(header);
 137                         buffer.append("</h5>"); //$NON-NLS-1$
 138                 }
 139         }
 140
 141         public static void addParagraph(StringBuffer buffer, String paragraph) {
 142                 if (paragraph != null) {
 143                         buffer.append("<p>"); //$NON-NLS-1$
 144                         buffer.append(paragraph);
 145                 }
 146         }
 147
 148         public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
 149                 if (paragraphReader != null)
 150                         addParagraph(buffer, read(paragraphReader));
 151         }
 152 }