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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.internal.text.html.HTMLPrinter;
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14
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131
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15 import dwtx.jface.internal.text.html.HTML2TextReader; // packageimport
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16 import dwtx.jface.internal.text.html.BrowserInformationControl; // packageimport
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17 import dwtx.jface.internal.text.html.SubstitutionTextReader; // packageimport
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18 import dwtx.jface.internal.text.html.HTMLTextPresenter; // packageimport
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19 import dwtx.jface.internal.text.html.BrowserInput; // packageimport
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20 import dwtx.jface.internal.text.html.SingleCharReader; // packageimport
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21 import dwtx.jface.internal.text.html.BrowserInformationControlInput; // packageimport
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22 import dwtx.jface.internal.text.html.HTMLMessages; // packageimport
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23
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24
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129
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25 import dwt.dwthelper.utils;
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26
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27 import java.io.IOException;
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28 import java.io.Reader;
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29 import java.net.URL;
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30
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31 import dwt.DWT;
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32 import dwt.DWTError;
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33 import dwt.graphics.FontData;
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34 import dwt.graphics.RGB;
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35 import dwt.widgets.Display;
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36
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37
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38 /**
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39 * Provides a set of convenience methods for creating HTML pages.
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40 * <p>
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41 * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p>
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42 */
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43 public class HTMLPrinter {
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44
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45 private static RGB BG_COLOR_RGB= new RGB(255, 255, 225); // RGB value of info bg color on WindowsXP
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46 private static RGB FG_COLOR_RGB= new RGB(0, 0, 0); // RGB value of info fg color on WindowsXP
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47
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48
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49 static {
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50 final Display display= Display.getDefault();
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51 if (display !is null && !display.isDisposed()) {
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52 try {
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53 display.asyncExec(new Runnable() {
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54 /*
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55 * @see java.lang.Runnable#run()
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56 */
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57 public void run() {
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58 BG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_BACKGROUND).getRGB();
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59 FG_COLOR_RGB= display.getSystemColor(DWT.COLOR_INFO_FOREGROUND).getRGB();
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60 }
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61 });
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62 } catch (DWTError err) {
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63 // see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
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64 if (err.code !is DWT.ERROR_DEVICE_DISPOSED)
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65 throw err;
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66 }
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67 }
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68 }
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69
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70 private HTMLPrinter() {
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71 }
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72
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73 private static String replace(String text, char c, String s) {
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74
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75 int previous= 0;
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76 int current= text.indexOf(c, previous);
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77
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78 if (current is -1)
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79 return text;
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80
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81 StringBuffer buffer= new StringBuffer();
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82 while (current > -1) {
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83 buffer.append(text.substring(previous, current));
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84 buffer.append(s);
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85 previous= current + 1;
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86 current= text.indexOf(c, previous);
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87 }
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88 buffer.append(text.substring(previous));
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89
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90 return buffer.toString();
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91 }
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92
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93 public static String convertToHTMLContent(String content) {
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94 content= replace(content, '&', "&"); //$NON-NLS-1$
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95 content= replace(content, '"', """); //$NON-NLS-1$
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96 content= replace(content, '<', "<"); //$NON-NLS-1$
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97 return replace(content, '>', ">"); //$NON-NLS-1$
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98 }
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99
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100 public static String read(Reader rd) {
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101
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102 StringBuffer buffer= new StringBuffer();
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103 char[] readBuffer= new char[2048];
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104
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105 try {
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106 int n= rd.read(readBuffer);
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107 while (n > 0) {
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108 buffer.append(readBuffer, 0, n);
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109 n= rd.read(readBuffer);
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110 }
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111 return buffer.toString();
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112 } catch (IOException x) {
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113 }
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114
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115 return null;
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116 }
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117
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118 public static void insertPageProlog(StringBuffer buffer, int position, RGB fgRGB, RGB bgRGB, String styleSheet) {
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119 if (fgRGB is null)
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120 fgRGB= FG_COLOR_RGB;
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121 if (bgRGB is null)
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122 bgRGB= BG_COLOR_RGB;
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123
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124 StringBuffer pageProlog= new StringBuffer(300);
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125
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126 pageProlog.append("<html>"); //$NON-NLS-1$
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127
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128 appendStyleSheetURL(pageProlog, styleSheet);
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129
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130 appendColors(pageProlog, fgRGB, bgRGB);
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131
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132 buffer.insert(position, pageProlog.toString());
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133 }
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134
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135 private static void appendColors(StringBuffer pageProlog, RGB fgRGB, RGB bgRGB) {
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136 pageProlog.append("<body text=\""); //$NON-NLS-1$
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137 appendColor(pageProlog, fgRGB);
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138 pageProlog.append("\" bgcolor=\""); //$NON-NLS-1$
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139 appendColor(pageProlog, bgRGB);
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140 pageProlog.append("\">"); //$NON-NLS-1$
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141 }
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142
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143 private static void appendColor(StringBuffer buffer, RGB rgb) {
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144 buffer.append('#');
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145 appendAsHexString(buffer, rgb.red);
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146 appendAsHexString(buffer, rgb.green);
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147 appendAsHexString(buffer, rgb.blue);
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148 }
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149
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150 private static void appendAsHexString(StringBuffer buffer, int intValue) {
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151 String hexValue= Integer.toHexString(intValue);
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152 if (hexValue.length() is 1)
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153 buffer.append('0');
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154 buffer.append(hexValue);
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155 }
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156
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157 public static void insertStyles(StringBuffer buffer, String[] styles) {
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158 if (styles is null || styles.length is 0)
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159 return;
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160
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161 StringBuffer styleBuf= new StringBuffer(10 * styles.length);
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162 for (int i= 0; styles !is null && i < styles.length; i++) {
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163 styleBuf.append(" style=\""); //$NON-NLS-1$
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164 styleBuf.append(styles[i]);
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165 styleBuf.append('"');
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166 }
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167
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168 // Find insertion index
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169 // a) within existing body tag with trailing space
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170 int index= buffer.indexOf("<body "); //$NON-NLS-1$
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171 if (index !is -1) {
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172 buffer.insert(index+5, styleBuf);
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173 return;
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174 }
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175
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176 // b) within existing body tag without attributes
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177 index= buffer.indexOf("<body>"); //$NON-NLS-1$
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178 if (index !is -1) {
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179 buffer.insert(index+5, ' ');
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180 buffer.insert(index+6, styleBuf);
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181 return;
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182 }
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183 }
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184
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185 private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
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186 if (styleSheet is null)
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187 return;
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188
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189 buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
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190 buffer.append(styleSheet);
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191 buffer.append("</style></head>"); //$NON-NLS-1$
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192 }
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193
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194 private static void appendStyleSheetURL(StringBuffer buffer, URL styleSheetURL) {
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195 if (styleSheetURL is null)
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196 return;
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197
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198 buffer.append("<head>"); //$NON-NLS-1$
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199
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200 buffer.append("<LINK REL=\"stylesheet\" HREF= \""); //$NON-NLS-1$
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201 buffer.append(styleSheetURL);
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202 buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
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203
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204 buffer.append("</head>"); //$NON-NLS-1$
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205 }
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206
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207 public static void insertPageProlog(StringBuffer buffer, int position) {
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208 StringBuffer pageProlog= new StringBuffer(60);
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209 pageProlog.append("<html>"); //$NON-NLS-1$
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210 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
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211 buffer.insert(position, pageProlog.toString());
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212 }
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213
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214 public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
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215 StringBuffer pageProlog= new StringBuffer(300);
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216 pageProlog.append("<html>"); //$NON-NLS-1$
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217 appendStyleSheetURL(pageProlog, styleSheetURL);
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218 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
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219 buffer.insert(position, pageProlog.toString());
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220 }
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221
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222 public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
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223 insertPageProlog(buffer, position, null, null, styleSheet);
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224 }
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225
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226 public static void addPageProlog(StringBuffer buffer) {
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227 insertPageProlog(buffer, buffer.length());
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228 }
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229
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230 public static void addPageEpilog(StringBuffer buffer) {
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231 buffer.append("</font></body></html>"); //$NON-NLS-1$
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232 }
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233
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234 public static void startBulletList(StringBuffer buffer) {
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235 buffer.append("<ul>"); //$NON-NLS-1$
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236 }
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237
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238 public static void endBulletList(StringBuffer buffer) {
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239 buffer.append("</ul>"); //$NON-NLS-1$
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240 }
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241
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242 public static void addBullet(StringBuffer buffer, String bullet) {
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243 if (bullet !is null) {
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244 buffer.append("<li>"); //$NON-NLS-1$
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245 buffer.append(bullet);
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246 buffer.append("</li>"); //$NON-NLS-1$
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247 }
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248 }
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249
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250 public static void addSmallHeader(StringBuffer buffer, String header) {
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251 if (header !is null) {
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252 buffer.append("<h5>"); //$NON-NLS-1$
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253 buffer.append(header);
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254 buffer.append("</h5>"); //$NON-NLS-1$
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255 }
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256 }
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257
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258 public static void addParagraph(StringBuffer buffer, String paragraph) {
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259 if (paragraph !is null) {
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260 buffer.append("<p>"); //$NON-NLS-1$
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261 buffer.append(paragraph);
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262 }
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263 }
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264
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265 public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
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266 if (paragraphReader !is null)
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267 addParagraph(buffer, read(paragraphReader));
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268 }
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269
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270 /**
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271 * Replaces the following style attributes of the font definition of the <code>html</code>
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272 * element:
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273 * <ul>
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274 * <li>font-size</li>
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275 * <li>font-weight</li>
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276 * <li>font-style</li>
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277 * <li>font-family</li>
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278 * </ul>
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279 * The font's name is used as font family, a <code>sans-serif</code> default font family is
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280 * appended for the case that the given font name is not available.
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281 * <p>
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282 * If the listed font attributes are not contained in the passed style list, nothing happens.
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283 * </p>
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284 *
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285 * @param styles CSS style definitions
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286 * @param fontData the font information to use
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287 * @return the modified style definitions
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288 * @since 3.3
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289 */
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290 public static String convertTopLevelFont(String styles, FontData fontData) {
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291 bool bold= (fontData.getStyle() & DWT.BOLD) !is 0;
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292 bool italic= (fontData.getStyle() & DWT.ITALIC) !is 0;
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293
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294 // See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=155993
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295 String size= Integer.toString(fontData.getHeight()) + ("carbon".equals(DWT.getPlatform()) ? "px" : "pt"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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296
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297 String family= "'" + fontData.getName() + "',sans-serif"; //$NON-NLS-1$ //$NON-NLS-2$
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298 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-size:\\s*)\\d+pt(\\;?.*\\})", "$1" + size + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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299 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-weight:\\s*)\\w+(\\;?.*\\})", "$1" + (bold ? "bold" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
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300 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-style:\\s*)\\w+(\\;?.*\\})", "$1" + (italic ? "italic" : "normal") + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
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301 styles= styles.replaceFirst("(html\\s*\\{.*(?:\\s|;)font-family:\\s*).+?(;.*\\})", "$1" + family + "$2"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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302 return styles;
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303 }
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304 }
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