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