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annotate org.eclipse.jface.text/src/org/eclipse/jface/internal/text/html/HTMLPrinter.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children dbfb303e8fb0
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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 org.eclipse.jface.internal.text.html.HTMLPrinter;
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14
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15 import org.eclipse.jface.internal.text.html.HTML2TextReader; // packageimport
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16 import org.eclipse.jface.internal.text.html.BrowserInformationControl; // packageimport
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17 import org.eclipse.jface.internal.text.html.SubstitutionTextReader; // packageimport
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18 import org.eclipse.jface.internal.text.html.HTMLTextPresenter; // packageimport
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19 import org.eclipse.jface.internal.text.html.BrowserInput; // packageimport
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20 import org.eclipse.jface.internal.text.html.SingleCharReader; // packageimport
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21 import org.eclipse.jface.internal.text.html.BrowserInformationControlInput; // packageimport
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22 import org.eclipse.jface.internal.text.html.HTMLMessages; // packageimport
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25 import java.lang.all;
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26 import java.util.Set;
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27 import org.eclipse.dwtxhelper.URL;
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28
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29 import org.eclipse.swt.SWT;
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30 import org.eclipse.swt.SWTError;
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31 import org.eclipse.swt.graphics.FontData;
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32 import org.eclipse.swt.graphics.RGB;
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33 import org.eclipse.swt.widgets.Display;
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36 /**
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37 * Provides a set of convenience methods for creating HTML pages.
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38 * <p>
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39 * Moved into this package from <code>org.eclipse.jface.internal.text.revisions</code>.</p>
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40 */
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41 public class HTMLPrinter {
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42
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43 private static RGB BG_COLOR_RGB_;
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44 private static RGB FG_COLOR_RGB_;
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45
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46 private static RGB BG_COLOR_RGB(){
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47 COLOR_RGB_init();
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48 return BG_COLOR_RGB_;
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49 }
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50 private static RGB FG_COLOR_RGB(){
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51 COLOR_RGB_init();
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52 return FG_COLOR_RGB_;
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53 }
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54
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55 private static bool COLOR_RGB_init_complete = false;
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56 private static void COLOR_RGB_init() {
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57 if( COLOR_RGB_init_complete ){
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58 return;
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59 }
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60 COLOR_RGB_init_complete = true;
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61 BG_COLOR_RGB_= new RGB(255, 255, 225); // RGB value of info bg color on WindowsXP
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62 FG_COLOR_RGB_= new RGB(0, 0, 0); // RGB value of info fg color on WindowsXP
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63 Display display= Display.getDefault();
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64 if (display !is null && !display.isDisposed()) {
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65 try {
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66 display.asyncExec( dgRunnable( (Display display_){
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67 BG_COLOR_RGB_= display_.getSystemColor(SWT.COLOR_INFO_BACKGROUND).getRGB();
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68 FG_COLOR_RGB_= display_.getSystemColor(SWT.COLOR_INFO_FOREGROUND).getRGB();
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69 }, display ));
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70 } catch (SWTError err) {
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71 // see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=45294
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72 if (err.code !is SWT.ERROR_DEVICE_DISPOSED)
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73 throw err;
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74 }
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75 }
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76 }
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77
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78 private this() {
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79 }
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80
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81 private static String replace(String text, char c, String s) {
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82
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83 int previous= 0;
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84 int current= text.indexOf(c, previous);
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85
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86 if (current is -1)
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87 return text;
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88
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89 StringBuffer buffer= new StringBuffer();
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90 while (current > -1) {
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91 buffer.append(text.substring(previous, current));
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92 buffer.append(s);
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93 previous= current + 1;
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94 current= text.indexOf(c, previous);
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95 }
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96 buffer.append(text.substring(previous));
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97
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98 return buffer.toString();
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99 }
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100
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101 public static String convertToHTMLContent(String content) {
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102 content= replace(content, '&', "&amp;"); //$NON-NLS-1$
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103 content= replace(content, '"', "&quot;"); //$NON-NLS-1$
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104 content= replace(content, '<', "&lt;"); //$NON-NLS-1$
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105 return replace(content, '>', "&gt;"); //$NON-NLS-1$
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106 }
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107
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108 public static String read(Reader rd) {
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109
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110 StringBuffer buffer= new StringBuffer();
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111 char[] readBuffer= new char[2048];
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112
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113 try {
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114 int n= rd.read(readBuffer);
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115 while (n > 0) {
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116 buffer.append(readBuffer[ 0 .. n ]);
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117 n= rd.read(readBuffer);
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118 }
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119 return buffer.toString();
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120 } catch (IOException x) {
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121 }
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122
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123 return null;
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124 }
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125
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126 public static void insertPageProlog(StringBuffer buffer, int position, RGB fgRGB, RGB bgRGB, String styleSheet) {
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127 if (fgRGB is null)
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128 fgRGB= FG_COLOR_RGB;
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129 if (bgRGB is null)
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130 bgRGB= BG_COLOR_RGB;
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131
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132 StringBuffer pageProlog= new StringBuffer(300);
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133
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134 pageProlog.append("<html>"); //$NON-NLS-1$
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135
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136 appendStyleSheetURL(pageProlog, styleSheet);
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137
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138 appendColors(pageProlog, fgRGB, bgRGB);
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139
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140 buffer.select(position,0);
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141 buffer.replace(pageProlog.toString());
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142 }
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143
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144 private static void appendColors(StringBuffer pageProlog, RGB fgRGB, RGB bgRGB) {
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145 pageProlog.append("<body text=\""); //$NON-NLS-1$
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146 appendColor(pageProlog, fgRGB);
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147 pageProlog.append("\" bgcolor=\""); //$NON-NLS-1$
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148 appendColor(pageProlog, bgRGB);
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149 pageProlog.append("\">"); //$NON-NLS-1$
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150 }
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151
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152 private static void appendColor(StringBuffer buffer, RGB rgb) {
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153 buffer.append('#');
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154 appendAsHexString(buffer, rgb.red);
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155 appendAsHexString(buffer, rgb.green);
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156 appendAsHexString(buffer, rgb.blue);
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157 }
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158
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159 private static void appendAsHexString(StringBuffer buffer, int intValue) {
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160 String hexValue= Integer.toHexString(intValue);
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161 if (hexValue.length() is 1)
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162 buffer.append('0');
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163 buffer.append(hexValue);
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164 }
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165
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166 public static void insertStyles(StringBuffer buffer, String[] styles) {
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167 if (styles is null || styles.length is 0)
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168 return;
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169
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170 StringBuffer styleBuf= new StringBuffer(10 * styles.length);
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171 for (int i= 0; styles !is null && i < styles.length; i++) {
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172 styleBuf.append(" style=\""); //$NON-NLS-1$
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173 styleBuf.append(styles[i]);
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174 styleBuf.append('"');
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175 }
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176
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177 // Find insertion index
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178 // a) within existing body tag with trailing space
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179 int index= buffer.slice().indexOf("<body "); //$NON-NLS-1$
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180 if (index !is -1) {
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181 buffer.select(index+5, 0);
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182 buffer.replace(styleBuf);
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183 return;
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184 }
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185
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186 // b) within existing body tag without attributes
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187 index= buffer.slice().indexOf("<body>"); //$NON-NLS-1$
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188 if (index !is -1) {
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189 buffer.select(index+5, 0);
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190 buffer.replace( " " );
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191 buffer.select(index+6, 0);
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192 buffer.replace(styleBuf);
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193 return;
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194 }
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195 }
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196
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197 private static void appendStyleSheetURL(StringBuffer buffer, String styleSheet) {
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198 if (styleSheet is null)
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199 return;
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200
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201 buffer.append("<head><style CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
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202 buffer.append(styleSheet);
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203 buffer.append("</style></head>"); //$NON-NLS-1$
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204 }
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205
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206 private static void appendStyleSheetURL(StringBuffer buffer, URL styleSheetURL) {
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207 if (styleSheetURL is null)
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208 return;
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209
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210 buffer.append("<head>"); //$NON-NLS-1$
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211
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212 buffer.append("<LINK REL=\"stylesheet\" HREF= \""); //$NON-NLS-1$
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213 buffer.append(styleSheetURL.toString());
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214 buffer.append("\" CHARSET=\"ISO-8859-1\" TYPE=\"text/css\">"); //$NON-NLS-1$
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215
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216 buffer.append("</head>"); //$NON-NLS-1$
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217 }
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218
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219 public static void insertPageProlog(StringBuffer buffer, int position) {
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220 StringBuffer pageProlog= new StringBuffer(60);
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221 pageProlog.append("<html>"); //$NON-NLS-1$
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222 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
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223 buffer.select(position, 0);
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224 buffer.replace(pageProlog.toString());
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225 }
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226
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227 public static void insertPageProlog(StringBuffer buffer, int position, URL styleSheetURL) {
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228 StringBuffer pageProlog= new StringBuffer(300);
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229 pageProlog.append("<html>"); //$NON-NLS-1$
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230 appendStyleSheetURL(pageProlog, styleSheetURL);
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231 appendColors(pageProlog, FG_COLOR_RGB, BG_COLOR_RGB);
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232 buffer.select(position, 0);
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233 buffer.replace(pageProlog.toString());
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234 }
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235
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236 public static void insertPageProlog(StringBuffer buffer, int position, String styleSheet) {
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237 insertPageProlog(buffer, position, null, null, styleSheet);
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238 }
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239
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240 public static void addPageProlog(StringBuffer buffer) {
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241 insertPageProlog(buffer, buffer.length());
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242 }
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243
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244 public static void addPageEpilog(StringBuffer buffer) {
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245 buffer.append("</font></body></html>"); //$NON-NLS-1$
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246 }
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247
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248 public static void startBulletList(StringBuffer buffer) {
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249 buffer.append("<ul>"); //$NON-NLS-1$
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250 }
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251
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252 public static void endBulletList(StringBuffer buffer) {
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253 buffer.append("</ul>"); //$NON-NLS-1$
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254 }
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255
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256 public static void addBullet(StringBuffer buffer, String bullet) {
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257 if (bullet !is null) {
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258 buffer.append("<li>"); //$NON-NLS-1$
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259 buffer.append(bullet);
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260 buffer.append("</li>"); //$NON-NLS-1$
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261 }
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262 }
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263
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diff changeset
264 public static void addSmallHeader(StringBuffer buffer, String header) {
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265 if (header !is null) {
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266 buffer.append("<h5>"); //$NON-NLS-1$
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267 buffer.append(header);
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268 buffer.append("</h5>"); //$NON-NLS-1$
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269 }
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270 }
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271
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272 public static void addParagraph(StringBuffer buffer, String paragraph) {
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273 if (paragraph !is null) {
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274 buffer.append("<p>"); //$NON-NLS-1$
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275 buffer.append(paragraph);
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276 }
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277 }
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278
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279 public static void addParagraph(StringBuffer buffer, Reader paragraphReader) {
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280 if (paragraphReader !is null)
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diff changeset
281 addParagraph(buffer, read(paragraphReader));
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282 }
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283
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diff changeset
284 /**
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285 * Replaces the following style attributes of the font definition of the <code>html</code>
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286 * element:
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287 * <ul>
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288 * <li>font-size</li>
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289 * <li>font-weight</li>
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290 * <li>font-style</li>
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291 * <li>font-family</li>
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292 * </ul>
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293 * The font's name is used as font family, a <code>sans-serif</code> default font family is
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294 * appended for the case that the given font name is not available.
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295 * <p>
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296 * If the listed font attributes are not contained in the passed style list, nothing happens.
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297 * </p>
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298 *
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299 * @param styles CSS style definitions
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300 * @param fontData the font information to use
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301 * @return the modified style definitions
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302 * @since 3.3
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303 */
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304 public static String convertTopLevelFont(String styles, FontData fontData) {
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305 bool bold= (fontData.getStyle() & SWT.BOLD) !is 0;
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306 bool italic= (fontData.getStyle() & SWT.ITALIC) !is 0;
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307
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308 // See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=155993
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309 String size= Integer.toString(fontData.getHeight()) ~ ("carbon".equals(SWT.getPlatform()) ? "px" : "pt"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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310
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311 String family= "'" ~ fontData.getName() ~ "',sans-serif"; //$NON-NLS-1$ //$NON-NLS-2$
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312 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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313 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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314 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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315 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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316 return styles;
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317 }
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318 }