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1 /*************************************************************************** |
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2 Title: graphbrowser/GraphBrowser.java |
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3 Author: Stefan Berghofer, TU Muenchen |
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4 Options: :tabSize=4: |
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5 |
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6 This is the graph browser's main class. It contains the "main(...)" |
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7 method, which is used for the stand-alone version, as well as |
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8 "init(...)", "start(...)" and "stop(...)" methods which are used for |
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9 the applet version. |
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10 Note: GraphBrowser is designed for the 1.1.x version of the JDK. |
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11 ***************************************************************************/ |
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12 |
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13 package isabelle.graphbrowser; |
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14 |
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15 import java.awt.*; |
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16 import java.applet.*; |
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17 import java.io.*; |
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18 import java.util.*; |
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19 import java.net.*; |
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20 import isabelle.awt.*; |
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21 |
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22 public class GraphBrowser extends Applet { |
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23 GraphView gv; |
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24 TreeBrowser tb=null; |
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25 String gfname; |
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26 |
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27 static boolean isApplet; |
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28 static Frame f; |
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29 |
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30 public GraphBrowser(String name) { |
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31 gfname=name; |
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32 } |
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33 |
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34 public GraphBrowser() {} |
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35 |
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36 public void showWaitMessage() { |
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37 if (isApplet) |
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38 getAppletContext().showStatus("calculating layout, please wait ..."); |
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39 else { |
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40 f.setCursor(new Cursor(Cursor.WAIT_CURSOR)); |
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41 } |
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42 } |
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43 |
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44 public void showReadyMessage() { |
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45 if (isApplet) |
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46 getAppletContext().showStatus("ready !"); |
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47 else { |
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48 f.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); |
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49 } |
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50 } |
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51 |
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52 public void viewFile(String fname) { |
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53 try { |
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54 if (isApplet) |
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55 getAppletContext().showDocument(new URL(getDocumentBase(), fname), "_blank"); |
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56 else { |
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57 String path = gfname.substring(0, gfname.lastIndexOf('/') + 1); |
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58 Reader rd; |
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59 BufferedReader br; |
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60 String line, text = ""; |
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61 |
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62 try { |
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63 rd = new BufferedReader(new InputStreamReader((new URL(fname)).openConnection().getInputStream())); |
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64 } catch (Exception exn) { |
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65 rd = new FileReader(path + fname); |
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66 } |
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67 br = new BufferedReader(rd); |
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68 |
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69 while ((line = br.readLine()) != null) |
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70 text += line + "\n"; |
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71 |
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72 if (fname.endsWith(".html")) { |
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73 /**** convert HTML to text (just a quick hack) ****/ |
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74 |
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75 String buf=""; |
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76 char[] text2,text3; |
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77 int i,j=0; |
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78 boolean special=false, html=false; |
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79 char ctrl; |
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80 |
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81 text2 = text.toCharArray(); |
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82 text3 = new char[text.length()]; |
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83 for (i = 0; i < text.length(); i++) { |
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84 char c = text2[i]; |
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85 if (c == '&') { |
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86 special = true; |
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87 buf = ""; |
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88 } else if (special) { |
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89 if (c == ';') { |
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90 special = false; |
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91 if (buf.equals("lt")) |
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92 text3[j++] = '<'; |
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93 else if (buf.equals("gt")) |
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94 text3[j++] = '>'; |
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95 else if (buf.equals("amp")) |
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96 text3[j++] = '&'; |
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97 } else |
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98 buf += c; |
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99 } else if (c == '<') { |
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100 html = true; |
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101 ctrl = text2[i+1]; |
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102 } else if (c == '>') |
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103 html = false; |
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104 else if (!html) |
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105 text3[j++] = c; |
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106 } |
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107 text = String.valueOf(text3); |
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108 } |
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109 |
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110 Frame f=new TextFrame(fname.substring(fname.lastIndexOf('/')+1),text); |
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111 f.setSize(500,600); |
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112 f.show(); |
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113 } |
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114 } catch (Exception exn) { |
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115 System.err.println("Can't read file "+fname); |
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116 } |
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117 } |
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118 |
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119 public void PS(String fname,boolean printable) throws IOException { |
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120 gv.PS(fname,printable); |
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121 } |
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122 |
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123 public boolean isEmpty() { |
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124 return tb==null; |
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125 } |
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126 |
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127 public void initBrowser(InputStream is, boolean noAWT) { |
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128 try { |
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129 Font font = noAWT ? null : new Font("Helvetica", Font.PLAIN, 12); |
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130 TreeNode tn = new TreeNode("Root", "", -1, true); |
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131 gv = new GraphView(new Graph(is, tn), this, font); |
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132 tb = new TreeBrowser(tn, gv, font); |
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133 gv.setTreeBrowser(tb); |
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134 Vector v = new Vector(10,10); |
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135 tn.collapsedDirectories(v); |
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136 gv.collapseDir(v); |
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137 |
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138 ScrollPane scrollp1 = new ScrollPane(); |
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139 ScrollPane scrollp2 = new ScrollPane(); |
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140 scrollp1.add(gv); |
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141 scrollp2.add(tb); |
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142 scrollp1.getHAdjustable().setUnitIncrement(20); |
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143 scrollp1.getVAdjustable().setUnitIncrement(20); |
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144 scrollp2.getHAdjustable().setUnitIncrement(20); |
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145 scrollp2.getVAdjustable().setUnitIncrement(20); |
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146 Component gv2 = new Border(scrollp1, 3); |
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147 Component tb2 = new Border(scrollp2, 3); |
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148 GridBagLayout gridbag = new GridBagLayout(); |
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149 GridBagConstraints cnstr = new GridBagConstraints(); |
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150 setLayout(gridbag); |
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151 cnstr.fill = GridBagConstraints.BOTH; |
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152 cnstr.insets = new Insets(5,5,5,5); |
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153 cnstr.weightx = 1; |
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154 cnstr.weighty = 1; |
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155 cnstr.gridwidth = 1; |
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156 gridbag.setConstraints(tb2,cnstr); |
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157 add(tb2); |
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158 cnstr.weightx = 2.5; |
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159 cnstr.gridwidth = GridBagConstraints.REMAINDER; |
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160 gridbag.setConstraints(gv2,cnstr); |
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161 add(gv2); |
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162 } catch (IOException exn) { |
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163 System.err.println("\nI/O error while reading graph file."); |
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164 } catch (ParseError exn) { |
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165 System.err.println("\nParse error in graph file:"); |
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166 System.err.println(exn.getMessage()); |
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167 System.err.println("\nSyntax:\n<vertexname> <vertexID> <dirname> [ + ] <path> [ < | > ] [ <vertexID> [ ... [ <vertexID> ] ... ] ] ;"); |
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168 } |
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169 } |
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170 |
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171 public void init() { |
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172 isApplet=true; |
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173 gfname=getParameter("graphfile"); |
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174 try { |
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175 InputStream is=(new URL(getDocumentBase(), gfname)).openConnection().getInputStream(); |
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176 initBrowser(is, false); |
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177 is.close(); |
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178 } catch (MalformedURLException exn) { |
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179 System.err.println("Invalid URL: "+gfname); |
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180 } catch (IOException exn) { |
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181 System.err.println("I/O error while reading "+gfname+"."); |
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182 } |
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183 } |
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184 |
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185 public static void main(String[] args) { |
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186 isApplet=false; |
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187 try { |
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188 GraphBrowser gb=new GraphBrowser(args.length > 0 ? args[0] : ""); |
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189 if (args.length > 0) { |
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190 InputStream is=new FileInputStream(args[0]); |
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191 gb.initBrowser(is, args.length > 1); |
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192 is.close(); |
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193 } |
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194 if (args.length > 1) { |
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195 try { |
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196 if (args[1].endsWith(".ps")) |
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197 gb.gv.PS(args[1], true); |
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198 else if (args[1].endsWith(".eps")) |
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199 gb.gv.PS(args[1], false); |
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200 else |
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201 System.err.println("Unknown file type: " + args[1]); |
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202 } catch (IOException exn) { |
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203 System.err.println("Unable to write file " + args[1]); |
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204 } |
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205 } else { |
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206 f=new GraphBrowserFrame(gb); |
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207 f.setSize(700,500); |
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208 f.show(); |
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209 } |
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210 } catch (IOException exn) { |
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211 System.err.println("Can't open graph file "+args[0]); |
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212 } |
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213 } |
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214 } |
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215 |