1 | /**
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2 | *#########################################################################
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3 | *
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4 | * A component of the Gatherer application, part of the Greenstone digital
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5 | * library suite from the New Zealand Digital Library Project at the
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6 | * University of Waikato, New Zealand.
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7 | *
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8 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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9 | *
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10 | * Copyright (C) 1999 New Zealand Digital Library Project
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11 | *
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12 | * This program is free software; you can redistribute it and/or modify
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13 | * it under the terms of the GNU General Public License as published by
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14 | * the Free Software Foundation; either version 2 of the License, or
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15 | * (at your option) any later version.
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16 | *
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17 | * This program is distributed in the hope that it will be useful,
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 | * GNU General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, write to the Free Software
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24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 | *########################################################################
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26 | */
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27 | package org.greenstone.gatherer.file;
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28 |
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29 | import java.io.*;
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30 | import javax.swing.table.*;
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31 | import org.greenstone.gatherer.Dictionary;
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32 | import org.greenstone.gatherer.Gatherer;
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33 | import org.greenstone.gatherer.gui.FileAssociationDialog;
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34 | import org.greenstone.gatherer.gui.PreviewCommandDialog;
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35 | import org.greenstone.gatherer.msm.MSMUtils;
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36 | import org.greenstone.gatherer.util.ExternalProgram;
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37 | import org.greenstone.gatherer.util.StaticStrings;
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38 | import org.greenstone.gatherer.util.Utility;
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39 | import org.greenstone.gatherer.util.WinRegistry;
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40 | import org.w3c.dom.*;
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41 |
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42 | public class FileAssociationManager
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43 | extends AbstractTableModel {
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44 | static final public String FILENAME_ARG = "%1";
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45 | static final private String ESCAPE = "\\\\"; // '\'
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46 | static final private String ESCAPED_ESCAPE = "\\\\\\\\"; // '\\'
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47 | static final private String SPACE = " ";
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48 | static final private String ESCAPED_SPACE = "\\\\ ";
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49 | private Element associations_element;
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50 | private File data_file;
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51 |
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52 | public FileAssociationManager() {
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53 | // Retrieve the associations_element from the config
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54 | associations_element = Gatherer.config.getFileAssociations();
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55 | // Initialize the associations. This involves looking through all current associations searching for those with a command of "".
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56 | if(associations_element != null) {
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57 | NodeList entries = associations_element.getElementsByTagName(StaticStrings.ENTRY_ELEMENT);
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58 | for(int i = 0; i < entries.getLength(); i++) {
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59 | Element entry = (Element) entries.item(i);
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60 | String command = MSMUtils.getValue(entry);
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61 | // If we encounter a command of ""...
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62 | if(command.length() == 0) {
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63 | // if we are on windows, we default to the start command
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64 | if(Utility.isWindows()) {
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65 | if (Utility.isWindows9x()) {
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66 | MSMUtils.setValue(entry, StaticStrings.WIN_9X_OPEN_COMMAND);
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67 | } else {
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68 | MSMUtils.setValue(entry, StaticStrings.WIN_OPEN_COMMAND);
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69 | }
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70 | }
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71 | // and if we are on mac, we default to the open program
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72 | else if(Utility.isMac()) {
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73 | MSMUtils.setValue(entry, StaticStrings.MAC_OPEN_COMMAND);
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74 | }
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75 | }
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76 | command = null;
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77 | entry = null;
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78 | }
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79 | entries = null;
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80 | }
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81 | else {
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82 | Gatherer.println("Didn't parse anything. About to crash.");
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83 | }
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84 | }
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85 |
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86 | public void edit() {
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87 | FileAssociationDialog dialog = new FileAssociationDialog(this);
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88 | dialog.display(null);
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89 | dialog = null;
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90 | }
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91 |
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92 | public String getBrowserCommand(String url) {
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93 | Gatherer.println("Get browser command: " + url);
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94 | // First off we try to retrieve one from the configuration
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95 | String command = Gatherer.config.getPreviewCommand();
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96 | // If that worked, substitute in the url and return
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97 | if(command != null && command.length() > 0) {
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98 | command = command.replaceAll("%1", url);
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99 | Gatherer.println("Result = " + command);
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100 | return command;
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101 | }
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102 | command = null;
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103 | // Failing that we have a guess at a sensible default
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104 | if(Utility.isWindows()) {
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105 | // we use cmd and start
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106 | if (Utility.isWindows9x()) {
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107 | command = StaticStrings.WIN_9X_OPEN_COMMAND;//"command.com /c start \""+url+"\"";
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108 | } else {
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109 | command = StaticStrings.WIN_OPEN_COMMAND;//"cmd.exe /c start \"\" \""+url+"\"";
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110 | }
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111 | } else if (Utility.isMac()) {
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112 | command = StaticStrings.MAC_OPEN_COMMAND; // "open %1"
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113 | } else {
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114 | // we try to look for a browser
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115 | String [] browsers = new String [] {"mozilla", "netscape"};
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116 | for (int i=0; i<browsers.length; i++) {
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117 | if (isAvailable(browsers[i])) {
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118 | command = browsers[i]+ " %1";
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119 | break;
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120 | }
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121 | }
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122 | }
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123 |
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124 | // if we still haven't found something, prompt the user
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125 | if (command == null) {
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126 | PreviewCommandDialog dialog = new PreviewCommandDialog();
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127 | command = dialog.display();
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128 | dialog.dispose();
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129 | dialog = null;
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130 | }
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131 |
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132 | // Store the result if any
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133 | if(command != null && !command.equals("")) {
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134 | Gatherer.config.setPreviewCommand(command);
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135 | command = command.replaceAll(FILENAME_ARG, url);
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136 | Gatherer.println("Result = " + command);
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137 | return command;
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138 | }
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139 | // if we haven't got a command by now, we'll never get one
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140 | Gatherer.println("Result = null");
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141 | return null;
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142 |
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143 | }
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144 |
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145 | public int getColumnCount() {
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146 | return 2;
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147 | }
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148 |
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149 | public String getColumnName(int column) {
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150 | String name;
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151 | switch(column) {
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152 | case 0:
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153 | name = Dictionary.get("FileAssociationDialog.Table.Extension");
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154 | break;
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155 | default:
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156 | name = Dictionary.get("FileAssociationDialog.Table.Command");
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157 | }
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158 | return name;
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159 | }
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160 |
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161 | public String [] getCommand(File file) {
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162 | String command = null;
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163 | String [] commands = null;
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164 | if(file.isFile()) {
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165 | // Determine extension
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166 | String filename = file.getAbsolutePath();
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167 | String extension = filename.substring(filename.lastIndexOf(".") + 1);
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168 | // Try to retrieve a value from cache
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169 | Element entry = getCommand(extension);
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170 | if(entry != null) {
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171 | ///ystem.err.println("Retrieved Value From Cache");
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172 | command = MSMUtils.getValue(entry);
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173 | }
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174 | if(command == null || command.length() == 0) {
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175 | ///ystem.err.println("No Existing Command");
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176 | // If command is null, and we are on windows try searching the registry.
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177 | if(Utility.isWindows()) {
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178 | //try the start command
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179 | if (Utility.isWindows9x()) {
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180 | command = StaticStrings.WIN_9X_OPEN_COMMAND;
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181 | } else {
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182 | command = StaticStrings.WIN_OPEN_COMMAND;
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183 | }
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184 |
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185 | }
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186 |
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187 | // If we are on a mac, default to using the open program
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188 | else if(Utility.isMac()) {
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189 | command = StaticStrings.MAC_OPEN_COMMAND;
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190 | }
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191 |
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192 | // Otherwise display the dialog and ask the user to enter launching command.
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193 | if(command == null || command.length() == 0) {
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194 | ///ystem.err.println("Show Dialog");
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195 | // Show the dialog which forces a user to select the launch command for a certain file.
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196 | FileAssociationDialog dialog = new FileAssociationDialog(this);
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197 | command = dialog.display(extension);
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198 | dialog = null;
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199 | }
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200 | // Hopefully by now we have a command, or else we're never going to get one. Add the association.
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201 | if(command != null) {
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202 | // If no previous entry existed create one.
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203 | if(entry == null) {
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204 | entry = associations_element.getOwnerDocument().createElement(StaticStrings.ENTRY_ELEMENT);
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205 | entry.setAttribute(StaticStrings.EXTENSION_ATTRIBUTE, extension);
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206 | associations_element.appendChild(entry);
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207 | }
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208 | // Replace the text in this node. Remember to replace the dummy filename with %1 - I dont think the filename will ever be in the comand now
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209 | //MSMUtils.setValue(entry, command.replaceAll(filename, FILENAME_ARG));
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210 | MSMUtils.setValue(entry, command);
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211 | }
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212 | }
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213 | if(command != null) {
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214 | // We have to fix filename under windows to escape the backslashes
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215 | filename = filename.replaceAll(ESCAPE, ESCAPED_ESCAPE);
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216 | // Replace %1 with the appropriate filename
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217 | command = command.replaceAll(FILENAME_ARG, filename);
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218 |
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219 | // Make the command into a string [] in case the filename has spaces in it
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220 | commands = command.split(" ");
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221 | }
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222 |
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223 | entry = null;
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224 | extension = null;
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225 | filename = null;
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226 | }
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227 | return commands;
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228 | }
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229 |
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230 | public Element getCommand(String target_extension) {
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231 | NodeList entries = associations_element.getElementsByTagName(StaticStrings.ENTRY_ELEMENT);
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232 | for(int i = 0; i < entries.getLength(); i++) {
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233 | Element entry = (Element) entries.item(i);
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234 | String extension = entry.getAttribute(StaticStrings.EXTENSION_ATTRIBUTE);
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235 | if(extension.equalsIgnoreCase(target_extension)) {
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236 | entries = null;
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237 | extension = null;
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238 | return entry;
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239 | }
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240 | }
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241 | entries = null;
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242 | return null;
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243 | }
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244 |
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245 | public String getCommandString(String target_extension) {
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246 | Element entry = getCommand(target_extension);
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247 | if(entry != null) {
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248 | return MSMUtils.getValue(entry);
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249 | }
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250 | else {
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251 | return "";
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252 | }
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253 | }
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254 |
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255 | public String getExtension(int index) {
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256 | NodeList entries = associations_element.getElementsByTagName(StaticStrings.ENTRY_ELEMENT);
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257 | if(0 <= index && index < entries.getLength()) {
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258 | Element entry = (Element) entries.item(index);
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259 | return entry.getAttribute(StaticStrings.EXTENSION_ATTRIBUTE);
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260 | }
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261 | return "";
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262 | }
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263 |
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264 | public int getRowCount() {
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265 | return size();
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266 | }
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267 |
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268 | public Object getValueAt(int row, int column) {
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269 | String extension = getExtension(row);
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270 | switch(column) {
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271 | case 0:
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272 | return extension;
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273 | default:
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274 | return getCommandString(extension);
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275 | }
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276 | }
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277 |
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278 | public void save() {
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279 | }
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280 |
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281 | public void setCommand(String extension, String command) {
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282 | Gatherer.println("Set Launch: " + extension + " with " + command);
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283 | // Retrieve any existing entry for this extension
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284 | Element entry = getCommand(extension);
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285 | // If no previous entry existed create one.
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286 | if(entry == null && command != null) {
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287 | entry = associations_element.getOwnerDocument().createElement(StaticStrings.ENTRY_ELEMENT);
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288 | entry.setAttribute(StaticStrings.EXTENSION_ATTRIBUTE, extension);
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289 | associations_element.appendChild(entry);
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290 | }
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291 |
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292 | if(command != null) {
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293 | // Replace the text in this node. If the user has used filename instead of %1 then too bad.
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294 | MSMUtils.setValue(entry, command);
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295 | }
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296 | else {
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297 | // Remove the entry
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298 | associations_element.removeChild(entry);
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299 | }
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300 | entry = null;
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301 | fireTableDataChanged(); // Can't be anymore efficient as DOM does not gareuntee ordering of new child nodes is consistant
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302 | }
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303 |
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304 | public int size() {
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305 | NodeList entries = associations_element.getElementsByTagName(StaticStrings.ENTRY_ELEMENT);
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306 | return entries.getLength();
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307 | }
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308 |
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309 |
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310 | protected boolean isAvailable(String program) {
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311 | try {
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312 | ExternalProgram e = new ExternalProgram("which", program);
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313 | e.exitProgram();
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314 | String out = e.getLineOfProgramOutput();
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315 | if (out == null) {
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316 | return false;
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317 | }
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318 | return true;
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319 | } catch (Exception exc) {
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320 | return false;
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321 | }
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322 | }
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323 | }
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