src/org/cacert/gigi/output/Template.java

   1 package org.cacert.gigi.output;
   2
   3 import java.io.EOFException;
   4 import java.io.IOException;
   5 import java.io.PrintWriter;
   6 import java.io.Reader;
   7 import java.util.LinkedList;
   8 import java.util.Map;
   9
  10 import org.cacert.gigi.Language;
  11
  12 public class Template implements Outputable {
  13         String[] contents;
  14         Outputable[] vars;
  15
  16         public Template(Reader r) {
  17                 try {
  18                         LinkedList<String> splitted = new LinkedList<String>();
  19                         LinkedList<Outputable> commands = new LinkedList<Outputable>();
  20                         StringBuffer buf = new StringBuffer();
  21                         int ch = r.read();
  22                         outer : while (true) {
  23                                 while (!endsWith(buf, "<?")) {
  24                                         if (ch == -1) {
  25                                                 break outer;
  26                                         }
  27                                         buf.append((char) ch);
  28                                         ch = r.read();
  29                                 }
  30                                 buf.delete(buf.length() - 2, buf.length());
  31                                 splitted.add(buf.toString());
  32                                 buf.delete(0, buf.length());
  33                                 while (!endsWith(buf, "?>")) {
  34                                         buf.append((char) ch);
  35                                         ch = r.read();
  36                                         if (ch == -1) {
  37                                                 throw new EOFException();
  38                                         }
  39                                 }
  40                                 buf.delete(buf.length() - 2, buf.length());
  41                                 commands.add(parseCommand(buf.toString()));
  42                                 buf.delete(0, buf.length());
  43                         }
  44                         splitted.add(buf.toString());
  45                         contents = splitted.toArray(new String[splitted.size()]);
  46                         vars = commands.toArray(new Outputable[commands.size()]);
  47                 } catch (IOException e) {
  48                         throw new Error(e);
  49                 }
  50         }
  51         private boolean endsWith(StringBuffer buf, String string) {
  52                 return buf.length() >= string.length()
  53                                 && buf.substring(buf.length() - string.length(), buf.length())
  54                                                 .equals(string);
  55         }
  56         private Outputable parseCommand(String s2) {
  57                 if (s2.startsWith("=_")) {
  58                         final String raw = s2.substring(2);
  59                         return new Outputable() {
  60
  61                                 @Override
  62                                 public void output(PrintWriter out, Language l,
  63                                                 Map<String, Object> vars) {
  64                                         out.print(l.getTranslation(raw));
  65                                 }
  66                         };
  67                 } else if (s2.startsWith("=$")) {
  68                         final String raw = s2.substring(2);
  69                         return new Outputable() {
  70
  71                                 @Override
  72                                 public void output(PrintWriter out, Language l,
  73                                                 Map<String, Object> vars) {
  74                                         outputVar(out, l, vars, raw);
  75                                 }
  76                         };
  77                 } else if (s2.startsWith("=s,")) {
  78                         String command = s2.substring(3);
  79                         final LinkedList<String> store = new LinkedList<String>();
  80                         while (command.startsWith("$")) {
  81                                 int idx = command.indexOf(",");
  82                                 store.add(command.substring(0, idx));
  83                                 command = command.substring(idx + 1);
  84                         }
  85                         final String text = command;
  86                         return new Outputable() {
  87
  88                                 @Override
  89                                 public void output(PrintWriter out, Language l,
  90                                                 Map<String, Object> vars) {
  91                                         String[] parts = l.getTranslation(text).split("%s");
  92                                         String[] myvars = store.toArray(new String[store.size()]);
  93                                         out.print(parts[0]);
  94                                         for (int j = 1; j < parts.length; j++) {
  95                                                 outputVar(out, l, vars, myvars[j - 1].substring(1));
  96                                                 out.print(parts[j]);
  97                                         }
  98                                 }
  99                         };
 100                 } else {
 101                         System.out.println("Unknown processing instruction: " + s2);
 102                 }
 103                 return null;
 104         }
 105         public void output(PrintWriter out, Language l, Map<String, Object> vars) {
 106                 for (int i = 0; i < contents.length; i++) {
 107                         out.print(contents[i]);
 108                         if (i < this.vars.length) {
 109                                 this.vars[i].output(out, l, vars);
 110                         }
 111                 }
 112         }
 113         private void outputVar(PrintWriter out, Language l,
 114                         Map<String, Object> vars, String varname) {
 115                 Object s = vars.get(varname);
 116
 117                 if (s == null) {
 118                         System.out.println("Empty variable: " + varname);
 119                 }
 120                 if (s instanceof Outputable) {
 121                         ((Outputable) s).output(out, l, vars);
 122                 } else {
 123                         out.print(s);
 124                 }
 125         }
 126 }