package org.cacert.gigi.output.template;
-import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
import java.text.SimpleDateFormat;
+import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.LinkedList;
import org.cacert.gigi.localisation.Language;
import org.cacert.gigi.output.DateSelector;
import org.cacert.gigi.util.DayDate;
+import org.cacert.gigi.util.EditDistance;
import org.cacert.gigi.util.HTMLEncoder;
/**
private static final Pattern ELSE_PATTERN = Pattern.compile(" ?\\} ?else ?\\{ ?");
+ private static final String[] POSSIBLE_CONTROL_PATTERNS = new String[] {
+ "if", "else", "foreach"
+ };
+
+ private static final String UNKOWN_CONTROL_STRUCTURE_MSG = "Unknown control structure \"%s\", did you mean \"%s\"?";
+
/**
* Creates a new template by parsing the contents from the given URL. This
* constructor will fail on syntax error. When the URL points to a file,
}
protected ParseResult parseContent(Reader r) throws IOException {
+ ParseContext context = new ParseContext(r);
+ ParseResult result = parseContent(context);
+ if (context.parseException.isEmpty()) {
+ return result;
+ }
+ while (context.curChar != -1) {
+ parseContent(context);
+ }
+ throw context.parseException;
+ }
+
+ protected ParseResult parseContent(ParseContext context) throws IOException {
LinkedList<String> splitted = new LinkedList<String>();
LinkedList<Translatable> commands = new LinkedList<Translatable>();
StringBuffer buf = new StringBuffer();
String blockType = null;
+ ParseContext tContext = null;
outer:
while (true) {
+ if (tContext != null) {
+ context.merge(tContext);
+ }
while ( !endsWith(buf, "<?")) {
- int ch = r.read();
+ int ch = context.read();
if (ch == -1) {
break outer;
}
buf.delete(buf.length() - 2, buf.length());
}
}
+ tContext = context.copy();
buf.delete(buf.length() - 2, buf.length());
splitted.add(buf.toString());
buf.delete(0, buf.length());
while ( !endsWith(buf, "?>")) {
- int ch = r.read();
+ int ch = context.read();
if (ch == -1) {
- throw new EOFException();
+ context.addError("Expected \"?>\"");
+ return null;
}
buf.append((char) ch);
}
if (m.matches()) {
String type = m.group(1);
String variable = m.group(2);
- ParseResult body = parseContent(r);
+ ParseContext bodyContext = tContext.copy();
+ ParseResult body = parseContent(bodyContext);
if (type.equals("if")) {
if ("else".equals(body.getEndType())) {
- commands.add(new IfStatement(variable, body.getBlock("else"), parseContent(r).getBlock("}")));
+ ParseContext bodyContext2 = bodyContext.copy();
+ commands.add(new IfStatement(variable, body.getBlock("else"), parseContent(bodyContext).getBlock("}")));
+ bodyContext.merge(bodyContext2);
} else {
commands.add(new IfStatement(variable, body.getBlock("}")));
}
} else if (type.equals("foreach")) {
commands.add(new ForeachStatement(variable, body.getBlock("}")));
} else {
- throw new IOException("Syntax error: unknown control structure: " + type);
+ String bestMatching = EditDistance.getBestMatchingStringByEditDistance(type, POSSIBLE_CONTROL_PATTERNS);
+ tContext.addError(String.format(UNKOWN_CONTROL_STRUCTURE_MSG, type, bestMatching));
}
+ tContext.merge(bodyContext);
continue;
} else if ((m = ELSE_PATTERN.matcher(com)).matches()) {
blockType = "else";
blockType = "}";
break;
} else {
- commands.add(parseCommand(com));
+ commands.add(parseCommand(com, tContext));
}
}
+ if (tContext != null) {
+ context.merge(tContext);
+ }
splitted.add(buf.toString());
- return new ParseResult(new TemplateBlock(splitted.toArray(new String[splitted.size()]), commands.toArray(new Translatable[commands.size()])), blockType);
+ ParseResult result = new ParseResult(new TemplateBlock(splitted.toArray(new String[splitted.size()]), commands.toArray(new Translatable[commands.size()])), blockType);
+ return result;
}
private boolean endsWith(StringBuffer buf, String string) {
return buf.length() >= string.length() && buf.substring(buf.length() - string.length(), buf.length()).equals(string);
}
- private Translatable parseCommand(String s2) {
+ private Translatable parseCommand(String s2, ParseContext context) {
if (s2.startsWith("=_")) {
final String raw = s2.substring(2);
if ( !s2.contains("$") && !s2.contains("!'")) {
final String raw = s2.substring(2);
return new OutputVariableCommand(raw);
} else {
- throw new Error("Unknown processing instruction: " + s2);
+ context.addError("Unknown processing instruction \"" + s2 + "\"," + " did you mean \"" + EditDistance.getBestMatchingStringByEditDistance(s2, new String[] {
+ "=_", "=$"
+ }) + "\"?");
+ return null;
}
}
Object s = vars.get(varname);
if (s == null) {
- System.out.println("Empty variable: " + varname);
+ System.err.println("Empty variable: " + varname);
}
if (s instanceof Outputable) {
((Outputable) s).output(out, l, vars);
public void addTranslations(Collection<String> s) {
data.addTranslations(s);
}
+
+ private class ParseContext {
+
+ public static final int CONTEXT_LENGTH = 20;
+
+ private Reader reader;
+
+ public final TemplateParseException parseException = new TemplateParseException(source);
+
+ int line = 1;
+
+ int column = 0;
+
+ private int curChar = -1;
+
+ private int[] charContext = new int[CONTEXT_LENGTH];
+
+ protected int contextPosition = 0;
+
+ public ParseContext(Reader reader) {
+ this.reader = reader;
+ }
+
+ public void addError(String message) {
+ addError(line, column, message);
+ }
+
+ public void addError(int line, int column, String message) {
+ StringBuffer charContextBuffer = new StringBuffer();
+ int j = contextPosition;
+ for (int i = 0; i < CONTEXT_LENGTH; i++) {
+ if (charContext[j] != 0) {
+ if (charContext[j] == '\n') {
+ charContextBuffer.append("\\n");
+ } else {
+ charContextBuffer.appendCodePoint(charContext[j]);
+ }
+ }
+ j = (j + 1) % CONTEXT_LENGTH;
+ }
+ parseException.addError(line, column, message, charContextBuffer.toString());
+ }
+
+ public void merge(ParseContext other) {
+ line = other.line;
+ column = other.column;
+ parseException.append(other.parseException);
+ }
+
+ public void append(ParseContext other) {
+ parseException.append(other.parseException);
+ }
+
+ public int read() throws IOException {
+ int ch;
+ while ((ch = reader.read()) == '\r') {
+ }
+ curChar = ch;
+ if (ch == '\n') {
+ line++;
+ column = 0;
+ } else {
+ column++;
+ }
+ if (ch != -1) {
+ charContext[contextPosition] = ch;
+ contextPosition = (contextPosition + 1) % CONTEXT_LENGTH;
+ }
+ return ch;
+ }
+
+ public ParseContext copy() {
+ ParseContext newParseContext = new ParseContext(reader);
+ newParseContext.line = line;
+ newParseContext.column = column;
+ newParseContext.charContext = Arrays.copyOf(charContext, charContext.length);
+ newParseContext.contextPosition = contextPosition;
+ return newParseContext;
+ }
+ }
}
projects / gigi.git / blobdiff