X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=src%2Fcom%2Fhughes%2Fandroid%2Fdictionary%2Fparser%2FWikiTokenizer.java;h=56bda7fcb62d731e538800204392110d0b6c68de;hb=2fc669d88306d563fc9c899d8d91b25d591692ea;hp=d6c8901aa6a6b6541c1d5b2ccd0e4dc4af56f507;hpb=21e752e044b6c0dd7d24e6da143068326beab2e3;p=DictionaryPC.git

diff --git a/src/com/hughes/android/dictionary/parser/WikiTokenizer.java b/src/com/hughes/android/dictionary/parser/WikiTokenizer.java
index d6c8901..56bda7f 100644
--- a/src/com/hughes/android/dictionary/parser/WikiTokenizer.java
+++ b/src/com/hughes/android/dictionary/parser/WikiTokenizer.java
@@ -14,633 +14,642 @@
 
 package com.hughes.android.dictionary.parser;
 
-import java.util.ArrayList;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public final class WikiTokenizer {
-  
-  public static interface Callback {
-    void onPlainText(final String text);
-    void onMarkup(WikiTokenizer wikiTokenizer);
-    void onWikiLink(WikiTokenizer wikiTokenizer);
-    void onNewline(WikiTokenizer wikiTokenizer);
-    void onFunction(final WikiTokenizer tokenizer, String functionName, List<String> functionPositionArgs,
-        Map<String, String> functionNamedArgs);
-    void onHeading(WikiTokenizer wikiTokenizer);
-    void onListItem(WikiTokenizer wikiTokenizer);
-    void onComment(WikiTokenizer wikiTokenizer);
-    void onHtml(WikiTokenizer wikiTokenizer);
-  }
-  
-  public static class DoNothingCallback implements Callback {
-
-    @Override
-    public void onPlainText(String text) {
-    }
-
-    @Override
-    public void onMarkup(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onWikiLink(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onNewline(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onFunction(WikiTokenizer tokenizer, String functionName,
-        List<String> functionPositionArgs, Map<String, String> functionNamedArgs) {
-    }
-
-    @Override
-    public void onHeading(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onListItem(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onComment(WikiTokenizer wikiTokenizer) {
-    }
-
-    @Override
-    public void onHtml(WikiTokenizer wikiTokenizer) {
-    }
-  }
-  
-  //private static final Pattern wikiTokenEvent = Pattern.compile("($)", Pattern.MULTILINE);
-  private static final Pattern wikiTokenEvent = Pattern.compile("(" +
-  		"\\{\\{|\\}\\}|" +
-  		"\\[\\[|\\]\\]|" +
-  		"\\||" +  // Need the | because we might have to find unescaped pipes
-        "=|" +  // Need the = because we might have to find unescaped =
-  		"<!--|" +
-  		"''|" +
-        "<pre>|" +
-        "<math>|" +
-        "<ref>|" +
-  		"$)", Pattern.MULTILINE);
-  private static final String listChars = "*#:;";
-  
-    
-  final String wikiText;
-  final Matcher matcher;
-
-  boolean justReturnedNewline = true;
-  int lastLineStart = 0;
-  int end = 0;
-  int start = -1;
-
-  final List<String> errors = new ArrayList<String>();
-  final List<String> tokenStack = new ArrayList<String>();
-  
-
-  private String headingWikiText;
-  private int headingDepth;
-  private int listPrefixEnd;
-  private boolean isPlainText;
-  private boolean isMarkup;
-  private boolean isComment;
-  private boolean isFunction;
-  private boolean isWikiLink;
-  private boolean isHtml;
-  private int firstUnescapedPipePos;
-  
-  private int lastUnescapedPipePos;
-  private int lastUnescapedEqualsPos;
-  private final List<String> positionArgs = new ArrayList<String>();
-  private final Map<String,String> namedArgs = new LinkedHashMap<String,String>();
-  
-
-  public WikiTokenizer(final String wikiText) {
-    this(wikiText, true);
-  }
-
-  public WikiTokenizer(String wikiText, final boolean isNewline) {
-    wikiText = wikiText.replace('\u2028', '\n');
-    wikiText = wikiText.replace('\u0085', '\n');
-    this.wikiText = wikiText;
-    this.matcher = wikiTokenEvent.matcher(wikiText);
-    justReturnedNewline = isNewline;
-  }
-
-  private void clear() {
-    errors.clear();
-    tokenStack.clear();
-
-    headingWikiText = null;
-    headingDepth = -1;
-    listPrefixEnd = -1;
-    isPlainText = false;
-    isMarkup = false;
-    isComment = false;
-    isFunction = false;
-    isWikiLink = false;
-    isHtml = false;
-    
-    firstUnescapedPipePos = -1;
-    lastUnescapedPipePos = -1;
-    lastUnescapedEqualsPos = -1;
-    positionArgs.clear();
-    namedArgs.clear();
-  }
-
-  private static final Pattern POSSIBLE_WIKI_TEXT = Pattern.compile(
-      "\\{\\{|" +
-      "\\[\\[|" +
-      "<!--|" +
-      "''|" +
-      "<pre>|" +
-      "<math>|" +
-      "<ref>|" +
-      "[\n]"
-      );
-
-  public static void dispatch(final String wikiText, final boolean isNewline, final Callback callback) {
-    // Optimization...
-    if (!POSSIBLE_WIKI_TEXT.matcher(wikiText).find()) {
-      callback.onPlainText(wikiText);
-    } else {
-      final WikiTokenizer tokenizer = new WikiTokenizer(wikiText, isNewline);
-      while (tokenizer.nextToken() != null) {
-        if (tokenizer.isPlainText()) {
-          callback.onPlainText(tokenizer.token());
-        } else if (tokenizer.isMarkup()) {
-          callback.onMarkup(tokenizer);
-        } else if (tokenizer.isWikiLink()) {
-          callback.onWikiLink(tokenizer);
-        } else if (tokenizer.isNewline()) {
-          callback.onNewline(tokenizer);
-        } else if (tokenizer.isFunction()) {
-          callback.onFunction(tokenizer, tokenizer.functionName(), tokenizer.functionPositionArgs(), tokenizer.functionNamedArgs());
-        } else if (tokenizer.isHeading()) {
-          callback.onHeading(tokenizer);
-        } else if (tokenizer.isListItem()) {
-          callback.onListItem(tokenizer);
-        } else if (tokenizer.isComment()) {
-          callback.onComment(tokenizer);
-        } else if (tokenizer.isHtml()) {
-          callback.onHtml(tokenizer);
-        } else if (!tokenizer.errors.isEmpty()) {
-          // Log was already printed....
+
+    public interface Callback {
+        void onPlainText(final String text);
+        void onMarkup(WikiTokenizer wikiTokenizer);
+        void onWikiLink(WikiTokenizer wikiTokenizer);
+        void onNewline(WikiTokenizer wikiTokenizer);
+        void onFunction(final WikiTokenizer tokenizer, String functionName, List<String> functionPositionArgs,
+                        Map<String, String> functionNamedArgs);
+        void onHeading(WikiTokenizer wikiTokenizer);
+        void onListItem(WikiTokenizer wikiTokenizer);
+        void onComment(WikiTokenizer wikiTokenizer);
+        void onHtml(WikiTokenizer wikiTokenizer);
+    }
+
+    public static class DoNothingCallback implements Callback {
+
+        @Override
+        public void onPlainText(String text) {
+        }
+
+        @Override
+        public void onMarkup(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onWikiLink(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onNewline(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onFunction(WikiTokenizer tokenizer, String functionName,
+                               List<String> functionPositionArgs, Map<String, String> functionNamedArgs) {
+        }
+
+        @Override
+        public void onHeading(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onListItem(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onComment(WikiTokenizer wikiTokenizer) {
+        }
+
+        @Override
+        public void onHtml(WikiTokenizer wikiTokenizer) {
+        }
+    }
+
+    //private static final Pattern wikiTokenEvent = Pattern.compile("($)", Pattern.MULTILINE);
+    private static final Pattern wikiTokenEvent = Pattern.compile("(" +
+            "\\{\\{|\\}\\}|" +
+            "\\[\\[|\\]\\]|" +
+            "\\||" +  // Need the | because we might have to find unescaped pipes
+            "=|" +  // Need the = because we might have to find unescaped =
+            "<!--|" +
+            "''|" +
+            "<pre>|" +
+            "<math>|" +
+            "<ref>|" +
+            "$)", Pattern.MULTILINE);
+    private static final String listChars = "*#:;";
+
+
+    final String wikiText;
+    final Matcher matcher;
+
+    boolean justReturnedNewline = true;
+    int lastLineStart = 0;
+    int end = 0;
+    int start = -1;
+
+    final List<String> errors = new ArrayList<>();
+    final List<String> tokenStack = new ArrayList<>();
+
+
+    private String headingWikiText;
+    private int headingDepth;
+    private int listPrefixEnd;
+    private boolean isPlainText;
+    private boolean isMarkup;
+    private boolean isComment;
+    private boolean isFunction;
+    private boolean isWikiLink;
+    private boolean isHtml;
+    private int firstUnescapedPipePos;
+
+    private int lastUnescapedPipePos;
+    private int lastUnescapedEqualsPos;
+    private final List<String> positionArgs = new ArrayList<>();
+    private final Map<String,String> namedArgs = new LinkedHashMap<>();
+
+
+    public WikiTokenizer(final String wikiText) {
+        this(wikiText, true);
+    }
+
+    public WikiTokenizer(String wikiText, final boolean isNewline) {
+        wikiText = wikiText.replace('\u2028', '\n');
+        wikiText = wikiText.replace('\u0085', '\n');
+        this.wikiText = wikiText;
+        this.matcher = wikiTokenEvent.matcher(wikiText);
+        justReturnedNewline = isNewline;
+    }
+
+    private void clear() {
+        errors.clear();
+        tokenStack.clear();
+
+        headingWikiText = null;
+        headingDepth = -1;
+        listPrefixEnd = -1;
+        isPlainText = false;
+        isMarkup = false;
+        isComment = false;
+        isFunction = false;
+        isWikiLink = false;
+        isHtml = false;
+
+        firstUnescapedPipePos = -1;
+        lastUnescapedPipePos = -1;
+        lastUnescapedEqualsPos = -1;
+        positionArgs.clear();
+        namedArgs.clear();
+    }
+
+    private static final Pattern POSSIBLE_WIKI_TEXT = Pattern.compile(
+                "\\{\\{|" +
+                "\\[\\[|" +
+                "<!--|" +
+                "''|" +
+                "<pre>|" +
+                "<math>|" +
+                "<ref>|" +
+                "[\n]"
+            );
+
+    public static void dispatch(final String wikiText, final boolean isNewline, final Callback callback) {
+        // Optimization...
+        if (!POSSIBLE_WIKI_TEXT.matcher(wikiText).find()) {
+            callback.onPlainText(wikiText);
         } else {
-          throw new IllegalStateException("Unknown wiki state: " + tokenizer.token());
+            final WikiTokenizer tokenizer = new WikiTokenizer(wikiText, isNewline);
+            while (tokenizer.nextToken() != null) {
+                if (tokenizer.isPlainText()) {
+                    callback.onPlainText(tokenizer.token());
+                } else if (tokenizer.isMarkup()) {
+                    callback.onMarkup(tokenizer);
+                } else if (tokenizer.isWikiLink()) {
+                    callback.onWikiLink(tokenizer);
+                } else if (tokenizer.isNewline()) {
+                    callback.onNewline(tokenizer);
+                } else if (tokenizer.isFunction()) {
+                    callback.onFunction(tokenizer, tokenizer.functionName(), tokenizer.functionPositionArgs(), tokenizer.functionNamedArgs());
+                } else if (tokenizer.isHeading()) {
+                    callback.onHeading(tokenizer);
+                } else if (tokenizer.isListItem()) {
+                    callback.onListItem(tokenizer);
+                } else if (tokenizer.isComment()) {
+                    callback.onComment(tokenizer);
+                } else if (tokenizer.isHtml()) {
+                    callback.onHtml(tokenizer);
+                } else if (!tokenizer.errors.isEmpty()) {
+                    // Log was already printed....
+                } else {
+                    throw new IllegalStateException("Unknown wiki state: " + tokenizer.token());
+                }
+            }
+        }
+    }
+
+    public List<String> errors() {
+        return errors;
+    }
+
+    public boolean isNewline() {
+        return justReturnedNewline;
+    }
+
+    public void returnToLineStart() {
+        end = start = lastLineStart;
+        justReturnedNewline = true;
+    }
+
+    public boolean isHeading() {
+        return headingWikiText != null;
+    }
+
+    public String headingWikiText() {
+        assert isHeading();
+        return headingWikiText;
+    }
+
+    public int headingDepth() {
+        assert isHeading();
+        return headingDepth;
+    }
+
+    public boolean isMarkup() {
+        return isMarkup;
+    }
+
+    public boolean isComment() {
+        return isComment;
+    }
+
+    public boolean isListItem() {
+        return listPrefixEnd != -1;
+    }
+
+    public String listItemPrefix() {
+        assert isListItem();
+        return wikiText.substring(start, listPrefixEnd);
+    }
+
+    public static String getListTag(char c) {
+        if (c == '#') {
+            return "ol";
+        }
+        return "ul";
+    }
+
+    public String listItemWikiText() {
+        assert isListItem();
+        return wikiText.substring(listPrefixEnd, end);
+    }
+
+    public boolean isFunction() {
+        return isFunction;
+    }
+
+    public String functionName() {
+        assert isFunction();
+        // "{{.."
+        if (firstUnescapedPipePos != -1) {
+            return trimNewlines(wikiText.substring(start + 2, firstUnescapedPipePos).trim());
         }
-      }
-    }
-  }
-  
-  public List<String> errors() {
-    return errors;
-  }
-  
-  public boolean isNewline() {
-    return justReturnedNewline;
-  }
-  
-  public void returnToLineStart() {
-    end = start = lastLineStart;
-    justReturnedNewline = true;
-  }
-  
-  public boolean isHeading() {
-    return headingWikiText != null;
-  }
-  
-  public String headingWikiText() {
-    assert isHeading();
-    return headingWikiText;
-  }
-  
-  public int headingDepth() {
-    assert isHeading();
-    return headingDepth;
-  }
-  
-  public boolean isMarkup() {
-    return isMarkup;
-  }
-
-  public boolean isComment() {
-    return isComment;
-  }
-
-  public boolean isListItem() {
-    return listPrefixEnd != -1;
-  }
-  
-  public String listItemPrefix() {
-    assert isListItem();
-    return wikiText.substring(start, listPrefixEnd);
-  }
-  
-  public static String getListTag(char c) {
-    if (c == '#') {
-      return "ol";
-    }
-    return "ul";
-  }
-
-  public String listItemWikiText() {
-    assert isListItem();
-    return wikiText.substring(listPrefixEnd, end);
-  }
-  
-  public boolean isFunction() {
-    return isFunction;
-  }
-
-  public String functionName() {
-    assert isFunction();
-    // "{{.."
-    if (firstUnescapedPipePos != -1) {
-      return trimNewlines(wikiText.substring(start + 2, firstUnescapedPipePos).trim());
-    }
-    final int safeEnd = Math.max(start + 2, end - 2);
-    return trimNewlines(wikiText.substring(start + 2, safeEnd).trim());
-  }
-  
-  public List<String> functionPositionArgs() {
-    return positionArgs;
-  }
-
-  public Map<String, String> functionNamedArgs() {
-    return namedArgs;
-  }
-
-  public boolean isPlainText() {
-    return isPlainText;
-  }
-
-  public boolean isWikiLink() {
-    return isWikiLink;
-  }
-
-  public String wikiLinkText() {
-    assert isWikiLink();
-    // "[[.."
-    if (lastUnescapedPipePos != -1) {
-      return trimNewlines(wikiText.substring(lastUnescapedPipePos + 1, end - 2));
-    }
-    assert start + 2 < wikiText.length() && end >= 2: wikiText;
-    return trimNewlines(wikiText.substring(start + 2, end - 2));
-  }
-
-  public String wikiLinkDest() {
-    assert isWikiLink();
-    // "[[.."
-    if (firstUnescapedPipePos != -1) {
-      return trimNewlines(wikiText.substring(start + 2, firstUnescapedPipePos));
-    }
-    return null;
-  }
-  
-  public boolean isHtml() {
-    return isHtml;
-  }
-
-  public boolean remainderStartsWith(final String prefix) {
-    return wikiText.startsWith(prefix, start);
-  }
-  
-  public void nextLine() {
-    final int oldStart = start;
-    while(nextToken() != null && !isNewline()) {}
-    if (isNewline()) {
-      --end;
-    }
-    start = oldStart;
-  }
-
-  
-  public WikiTokenizer nextToken() {
-    this.clear();
-    
-    start = end;
-    
-    if (justReturnedNewline) {
-      lastLineStart = start;
-    }
-    
-    try {
-    
-    final int len = wikiText.length();
-    if (start >= len) {
-      return null;
-    }
-    
-    // Eat a newline if we're looking at one:
-    final boolean atNewline = wikiText.charAt(end) == '\n' || wikiText.charAt(end) == '\u2028';
-    if (atNewline) {
-      justReturnedNewline = true;
-      ++end;
-      return this;
-    }
-    
-    if (justReturnedNewline) {   
-      justReturnedNewline = false;
-
-      final char firstChar = wikiText.charAt(end);
-      if (firstChar == '=') {
-        final int headerStart = end;
-        // Skip ===...
-        while (++end < len && wikiText.charAt(end) == '=') {}
-        final int headerTitleStart = end;
-        headingDepth = headerTitleStart - headerStart;
-        // Skip non-=...
-        if (end < len) {
-          final int nextNewline = safeIndexOf(wikiText, end, "\n", "\n");
-          final int closingEquals = escapedFindEnd(end, "=");
-          if (wikiText.charAt(closingEquals - 1) == '=') {
-            end = closingEquals - 1;
-          } else {
-            end = nextNewline;
-          }
+        final int safeEnd = Math.max(start + 2, end - 2);
+        return trimNewlines(wikiText.substring(start + 2, safeEnd).trim());
+    }
+
+    public List<String> functionPositionArgs() {
+        return positionArgs;
+    }
+
+    public Map<String, String> functionNamedArgs() {
+        return namedArgs;
+    }
+
+    public boolean isPlainText() {
+        return isPlainText;
+    }
+
+    public boolean isWikiLink() {
+        return isWikiLink;
+    }
+
+    public String wikiLinkText() {
+        assert isWikiLink();
+        // "[[.."
+        if (lastUnescapedPipePos != -1) {
+            return trimNewlines(wikiText.substring(lastUnescapedPipePos + 1, end - 2));
         }
-        final int headerTitleEnd = end;
-        headingWikiText = wikiText.substring(headerTitleStart, headerTitleEnd);
-        // Skip ===...
-        while (end < len && ++end < len && wikiText.charAt(end) == '=') {}
-        final int headerEnd = end;
-        if (headerEnd - headerTitleEnd != headingDepth) {
-          errors.add("Mismatched header depth: " + token());
+        assert start + 2 < wikiText.length() && end >= 2: wikiText;
+        return trimNewlines(wikiText.substring(start + 2, end - 2));
+    }
+
+    public String wikiLinkDest() {
+        assert isWikiLink();
+        // "[[.."
+        if (firstUnescapedPipePos != -1) {
+            return trimNewlines(wikiText.substring(start + 2, firstUnescapedPipePos));
         }
-        return this;
-      }
-      if (listChars.indexOf(firstChar) != -1) {
-        while (++end < len && listChars.indexOf(wikiText.charAt(end)) != -1) {}
-        listPrefixEnd = end;
-        end = escapedFindEnd(start, "\n");
-        return this;
-      }
-    }
-
-    if (wikiText.startsWith("'''", start)) {
-      isMarkup = true;
-      end = start + 3;
-      return this;
-    }
-    
-    if (wikiText.startsWith("''", start)) {
-      isMarkup = true;
-      end = start + 2;
-      return this;
-    }
-
-    if (wikiText.startsWith("[[", start)) {
-      end = escapedFindEnd(start + 2, "]]");
-      isWikiLink = errors.isEmpty();
-      return this;
-    }
-
-    if (wikiText.startsWith("{{", start)) {      
-      end = escapedFindEnd(start + 2, "}}");
-      isFunction = errors.isEmpty();
-      return this;
-    }
-
-    if (wikiText.startsWith("<pre>", start)) {
-      end = safeIndexOf(wikiText, start, "</pre>", "\n");
-      isHtml = true;
-      return this;
-    }
-
-    if (wikiText.startsWith("<ref>", start)) {
-        end = safeIndexOf(wikiText, start, "</ref>", "\n");
-        isHtml = true;
-        return this;
-      }
-
-    if (wikiText.startsWith("<math>", start)) {
-      end = safeIndexOf(wikiText, start, "</math>", "\n");
-      isHtml = true;
-      return this;
-    }
-
-    if (wikiText.startsWith("<!--", start)) {
-      isComment = true;
-      end = safeIndexOf(wikiText, start, "-->", "\n");
-      return this;
-    }
-
-    if (wikiText.startsWith("}}", start) || wikiText.startsWith("]]", start)) {
-      errors.add("Close without open!");
-      end += 2;
-      return this;
-    }
-
-    if (wikiText.charAt(start) == '|' || wikiText.charAt(start) == '=') {
-      isPlainText = true;
-      ++end;
-      return this;
-    }
-
-    
-    if (this.matcher.find(start)) {
-      end = this.matcher.start(1);
-      isPlainText = true;
-      if (end == start) {
-        errors.add("Empty group: " + this.matcher.group());
-        assert false;
-      }
-      return this;
-    }
-    
-    end = wikiText.length();
-    return this;
-    
-    } finally {
-      if (!errors.isEmpty()) {
-        System.err.println("Errors: " + errors + ", token=" + token());
-      }
-    }
-    
-  }
-  
-  public String token() {
-    final String token = wikiText.substring(start, end);
-    assert token.equals("\n") || !token.endsWith("\n") : "token='" + token + "'";
-    return token;
-  }
-  
-  final static String[] patterns = { "\n", "{{", "}}", "[[", "]]", "|", "=", "<!--" };
-  private int escapedFindEnd(final int start, final String toFind) {
-    assert tokenStack.isEmpty();
-    
-    final boolean insideFunction = toFind.equals("}}");
-    
-    int end = start;
-    int firstNewline = -1;
-    int[] nextMatch = new int[8];
-    for (int i = 0; i < 8; ++i) {
-        nextMatch[i] = wikiText.indexOf(patterns[i], start);
-        if (nextMatch[i] == -1) nextMatch[i] = i > 0 ? 0x7fffffff : wikiText.length();
-    }
-    while (end < wikiText.length()) {
-        // Manual replacement for matcher.find(end),
-        // because Java regexp is a ridiculously slow implementation.
-        // Initialize to always match the end.
-        int matchIdx = 0;
-        for (int i = 1; i < 8; ++i) {
-            if (nextMatch[i] < nextMatch[matchIdx]) {
-                matchIdx = i;
+        return null;
+    }
+
+    public boolean isHtml() {
+        return isHtml;
+    }
+
+    public boolean remainderStartsWith(final String prefix) {
+        return wikiText.startsWith(prefix, start);
+    }
+
+    public void nextLine() {
+        final int oldStart = start;
+        while(nextToken() != null && !isNewline()) {}
+        if (isNewline()) {
+            --end;
+        }
+        start = oldStart;
+    }
+
+
+    public WikiTokenizer nextToken() {
+        this.clear();
+
+        start = end;
+
+        if (justReturnedNewline) {
+            lastLineStart = start;
+        }
+
+        try {
+
+            final int len = wikiText.length();
+            if (start >= len) {
+                return null;
+            }
+
+            // Eat a newline if we're looking at one:
+            final boolean atNewline = wikiText.charAt(end) == '\n' || wikiText.charAt(end) == '\u2028' || wikiText.charAt(end) == '\u2029';
+            if (atNewline) {
+                justReturnedNewline = true;
+                ++end;
+                return this;
+            }
+
+            if (justReturnedNewline) {
+                justReturnedNewline = false;
+
+                final char firstChar = wikiText.charAt(end);
+                if (firstChar == '=') {
+                    final int headerStart = end;
+                    // Skip ===...
+                    while (++end < len && wikiText.charAt(end) == '=') {}
+                    final int headerTitleStart = end;
+                    headingDepth = headerTitleStart - headerStart;
+                    // Skip non-=...
+                    if (end < len) {
+                        final int nextNewline = safeIndexOf(wikiText, end, "\n", "\n");
+                        final int closingEquals = escapedFindEnd(end, "=");
+                        if (wikiText.charAt(closingEquals - 1) == '=') {
+                            end = closingEquals - 1;
+                        } else {
+                            end = nextNewline;
+                        }
+                    }
+                    final int headerTitleEnd = end;
+                    headingWikiText = wikiText.substring(headerTitleStart, headerTitleEnd);
+                    // Skip ===...
+                    while (end < len && ++end < len && wikiText.charAt(end) == '=') {}
+                    final int headerEnd = end;
+                    if (headerEnd - headerTitleEnd != headingDepth) {
+                        errors.add("Mismatched header depth: " + token());
+                    }
+                    return this;
+                }
+                if (listChars.indexOf(firstChar) != -1) {
+                    while (++end < len && listChars.indexOf(wikiText.charAt(end)) != -1) {}
+                    listPrefixEnd = end;
+                    end = escapedFindEnd(start, "\n");
+                    return this;
+                }
+            }
+
+            if (wikiText.startsWith("'''", start)) {
+                isMarkup = true;
+                end = start + 3;
+                return this;
+            }
+
+            if (wikiText.startsWith("''", start)) {
+                isMarkup = true;
+                end = start + 2;
+                return this;
+            }
+
+            if (wikiText.startsWith("[[", start)) {
+                end = escapedFindEnd(start + 2, "]]");
+                isWikiLink = errors.isEmpty();
+                return this;
+            }
+
+            if (wikiText.startsWith("{{", start)) {
+                end = escapedFindEnd(start + 2, "}}");
+                isFunction = errors.isEmpty();
+                return this;
+            }
+
+            if (wikiText.startsWith("<pre>", start)) {
+                end = safeIndexOf(wikiText, start, "</pre>", "\n");
+                isHtml = true;
+                return this;
+            }
+
+            if (wikiText.startsWith("<ref>", start)) {
+                end = safeIndexOf(wikiText, start, "</ref>", "\n");
+                isHtml = true;
+                return this;
+            }
+
+            if (wikiText.startsWith("<math>", start)) {
+                end = safeIndexOf(wikiText, start, "</math>", "\n");
+                isHtml = true;
+                return this;
+            }
+
+            if (wikiText.startsWith("<!--", start)) {
+                isComment = true;
+                end = safeIndexOf(wikiText, start, "-->", "\n");
+                return this;
+            }
+
+            if (wikiText.startsWith("}}", start) || wikiText.startsWith("]]", start)) {
+                errors.add("Close without open!");
+                end += 2;
+                return this;
+            }
+
+            if (wikiText.charAt(start) == '|' || wikiText.charAt(start) == '=') {
+                isPlainText = true;
+                ++end;
+                return this;
+            }
+
+
+            if (this.matcher.find(start)) {
+                end = this.matcher.start(1);
+                isPlainText = true;
+                if (end == start) {
+                    // stumbled over a new type of newline?
+                    // Or matcher is out of sync with checks above
+                    errors.add("Empty group: " + this.matcher.group() + " char: " + (int)wikiText.charAt(end));
+                    assert false;
+                    throw new RuntimeException("matcher not in sync with code, or new type of newline, errors :" + errors);
+                }
+                return this;
+            }
+
+            end = wikiText.length();
+            return this;
+
+        } finally {
+            if (!errors.isEmpty()) {
+                System.err.println("Errors: " + errors + ", token=" + token());
             }
         }
 
-        int matchStart = nextMatch[matchIdx];
-        String matchText = patterns[matchIdx];
-        int matchEnd = matchStart + matchText.length();
-        nextMatch[matchIdx] = wikiText.indexOf(patterns[matchIdx], matchEnd);
-        if (nextMatch[matchIdx] == -1) nextMatch[matchIdx] = matchIdx > 0 ? 0x7fffffff : wikiText.length();
-        if (matchIdx == 0) {
-            matchText = "";
-            matchEnd = matchStart;
+    }
+
+    public String token() {
+        final String token = wikiText.substring(start, end);
+        assert token.equals("\n") || !token.endsWith("\n") : "token='" + token + "'";
+        return token;
+    }
+
+    static final String[] patterns = { "\n", "{{", "}}", "[[", "]]", "[", "]", "|", "=", "<!--" };
+    private int escapedFindEnd(final int start, final String toFind) {
+        assert tokenStack.isEmpty();
+
+        final boolean insideFunction = toFind.equals("}}");
+
+        int end = start;
+        int firstNewline = -1;
+        int[] nextMatch = new int[patterns.length];
+        Arrays.fill(nextMatch, -2);
+        int singleBrackets = 0;
+        while (end < wikiText.length()) {
+            // Manual replacement for matcher.find(end),
+            // because Java regexp is a ridiculously slow implementation.
+            // Initialize to always match the end.
+            int matchIdx = 0;
+            for (int i = 0; i < nextMatch.length; ++i) {
+                if (nextMatch[i] <= end) {
+                    nextMatch[i] = wikiText.indexOf(patterns[i], end);
+                    if (nextMatch[i] == -1) nextMatch[i] = i > 0 ? 0x7fffffff : wikiText.length();
+                }
+                if (nextMatch[i] < nextMatch[matchIdx]) {
+                    matchIdx = i;
+                }
+            }
+
+            int matchStart = nextMatch[matchIdx];
+            String matchText = patterns[matchIdx];
+            int matchEnd = matchStart + matchText.length();
+            if (matchIdx == 0) {
+                matchText = "";
+                matchEnd = matchStart;
+            }
+
+            assert matchEnd > end || matchText.length() == 0: "Group=" + matchText;
+            if (matchText.length() == 0) {
+                assert matchStart == wikiText.length() || wikiText.charAt(matchStart) == '\n' : wikiText + ", " + matchStart;
+                if (firstNewline == -1) {
+                    firstNewline = matchEnd;
+                }
+                if (tokenStack.isEmpty() && toFind.equals("\n")) {
+                    return matchStart;
+                }
+                ++end;
+            } else if (tokenStack.isEmpty() && matchText.equals(toFind)) {
+                // The normal return....
+                if (insideFunction) {
+                    addFunctionArg(insideFunction, matchStart);
+                }
+                return matchEnd;
+            } else if (matchText.equals("[")) {
+                singleBrackets++;
+            } else if (matchText.equals("]")) {
+                if (singleBrackets > 0) singleBrackets--;
+            } else if (matchText.equals("[[") || matchText.equals("{{")) {
+                tokenStack.add(matchText);
+            } else if (matchText.equals("]]") || matchText.equals("}}")) {
+                if (tokenStack.size() > 0) {
+                    final String removed = tokenStack.remove(tokenStack.size() - 1);
+                    if (removed.equals("{{") && !matchText.equals("}}")) {
+                        if (singleBrackets >= 2) { // assume this is really two closing single ]
+                            singleBrackets -= 2;
+                            tokenStack.add(removed);
+                        } else {
+                            errors.add("Unmatched {{ error: " + wikiText.substring(start, matchEnd));
+                            return safeIndexOf(wikiText, start, "\n", "\n");
+                        }
+                    } else if (removed.equals("[[") && !matchText.equals("]]")) {
+                        errors.add("Unmatched [[ error: " + wikiText.substring(start, matchEnd));
+                        return safeIndexOf(wikiText, start, "\n", "\n");
+                    }
+                } else {
+                    errors.add("Pop too many " + matchText + " error: " + wikiText.substring(start, matchEnd).replace("\n", "\\\\n"));
+                    // If we were looking for a newline
+                    return safeIndexOf(wikiText, start, "\n", "\n");
+                }
+            } else if (matchText.equals("|")) {
+                if (tokenStack.isEmpty()) {
+                    addFunctionArg(insideFunction, matchStart);
+                }
+            } else if (matchText.equals("=")) {
+                if (tokenStack.isEmpty()) {
+                    lastUnescapedEqualsPos = matchStart;
+                }
+                // Do nothing.  These can match spuriously, and if it's not the thing
+                // we're looking for, keep on going.
+            } else if (matchText.equals("<!--")) {
+                end = wikiText.indexOf("-->", matchStart);
+                if (end == -1) {
+                    errors.add("Unmatched <!-- error: " + wikiText.substring(start));
+                    return safeIndexOf(wikiText, start, "\n", "\n");
+                }
+            } else if (matchText.equals("''") || (matchText.startsWith("<") && matchText.endsWith(">"))) {
+                // Don't care.
+            } else {
+                assert false : "Match text='" + matchText + "'";
+                throw new IllegalStateException();
+            }
+
+            // Inside the while loop.  Just go forward.
+            end = Math.max(end, matchEnd);
         }
+        if (toFind.equals("\n") && tokenStack.isEmpty()) {
+            // We were looking for the end, we got it.
+            return end;
+        }
+        errors.add("Couldn't find: " + (toFind.equals("\n") ? "newline" : toFind) + ", "+ wikiText.substring(start));
+        if (firstNewline != -1) {
+            return firstNewline;
+        }
+        return end;
+    }
+
+    private void addFunctionArg(final boolean insideFunction, final int matchStart) {
+        if (firstUnescapedPipePos == -1) {
+            firstUnescapedPipePos = lastUnescapedPipePos = matchStart;
+        } else if (insideFunction) {
+            if (lastUnescapedEqualsPos > lastUnescapedPipePos) {
+                final String key = wikiText.substring(lastUnescapedPipePos + 1, lastUnescapedEqualsPos);
+                final String value = wikiText.substring(lastUnescapedEqualsPos + 1, matchStart);
+                namedArgs.put(trimNewlines(key), trimNewlines(value));
+            } else {
+                final String value = wikiText.substring(lastUnescapedPipePos + 1, matchStart);
+                positionArgs.add(trimNewlines(value));
+            }
+        }
+        lastUnescapedPipePos = matchStart;
+    }
+
+    static String trimNewlines(String s) {
+        while (s.startsWith("\n")) {
+            s = s.substring(1);
+        }
+        while (s.endsWith("\n")) {
+            s = s.substring(0, s.length() - 1);
+        }
+        return s.replace('\n', ' ');
+    }
 
-        assert matchEnd > end || matchText.length() == 0: "Group=" + matchText;
-        if (matchText.length() == 0) {
-          assert matchStart == wikiText.length() || wikiText.charAt(matchStart) == '\n' : wikiText + ", " + matchStart;
-          if (firstNewline == -1) {
-            firstNewline = matchEnd;
-          }
-          if (tokenStack.isEmpty() && toFind.equals("\n")) {
-            return matchStart;
-          }
-          ++end;
-        } else if (tokenStack.isEmpty() && matchText.equals(toFind)) {
-          // The normal return....
-          if (insideFunction) {
-            addFunctionArg(insideFunction, matchStart);
-          }
-          return matchEnd;
-        } else if (matchText.equals("[[") || matchText.equals("{{")) {
-          tokenStack.add(matchText);
-        } else if (matchText.equals("]]") || matchText.equals("}}")) {
-          if (tokenStack.size() > 0) {
-            final String removed = tokenStack.remove(tokenStack.size() - 1);
-            if (removed.equals("{{") && !matchText.equals("}}")) {
-              errors.add("Unmatched {{ error: " + wikiText.substring(start));
-              return safeIndexOf(wikiText, start, "\n", "\n");
-            } else if (removed.equals("[[") && !matchText.equals("]]")) {
-              errors.add("Unmatched [[ error: " + wikiText.substring(start));
-              return safeIndexOf(wikiText, start, "\n", "\n");
+    static int safeIndexOf(final String s, final int start, final String target, final String backup) {
+        int close = s.indexOf(target, start);
+        if (close != -1) {
+            // Don't step over a \n.
+            return close + (target.equals("\n") ? 0 : target.length());
+        }
+        close = s.indexOf(backup, start);
+        if (close != -1) {
+            return close + (backup.equals("\n") ? 0 : backup.length());
+        }
+        return s.length();
+    }
+
+    public static String toPlainText(final String wikiText) {
+        final WikiTokenizer wikiTokenizer = new WikiTokenizer(wikiText);
+        final StringBuilder builder = new StringBuilder();
+        while (wikiTokenizer.nextToken() != null) {
+            if (wikiTokenizer.isPlainText()) {
+                builder.append(wikiTokenizer.token());
+            } else if (wikiTokenizer.isWikiLink()) {
+                builder.append(wikiTokenizer.wikiLinkText());
+            } else if (wikiTokenizer.isNewline()) {
+                builder.append("\n");
+            } else if (wikiTokenizer.isFunction()) {
+                builder.append(wikiTokenizer.token());
             }
-          } else {
-            errors.add("Pop too many error: " + wikiText.substring(start).replace("\n", "\\\\n"));
-            // If we were looking for a newline
-            return safeIndexOf(wikiText, start, "\n", "\n");
-          }
-        } else if (matchText.equals("|")) { 
-          if (tokenStack.isEmpty()) {
-            addFunctionArg(insideFunction, matchStart);
-          }
-        } else if (matchText.equals("=")) {
-          if (tokenStack.isEmpty()) {
-            lastUnescapedEqualsPos = matchStart;
-          }
-          // Do nothing.  These can match spuriously, and if it's not the thing
-          // we're looking for, keep on going.
-        } else if (matchText.equals("<!--")) {
-          end = wikiText.indexOf("-->");
-          if (end == -1) {
-            errors.add("Unmatched <!-- error: " + wikiText.substring(start));
-            return safeIndexOf(wikiText, start, "\n", "\n");
-          }
-        } else if (matchText.equals("''") || (matchText.startsWith("<") && matchText.endsWith(">"))) {
-          // Don't care.
-        } else {
-          assert false : "Match text='" + matchText + "'";
-          throw new IllegalStateException();
         }
+        return builder.toString();
+    }
 
-      // Inside the while loop.  Just go forward.
-      end = Math.max(end, matchEnd);
-    }
-    if (toFind.equals("\n") && tokenStack.isEmpty()) {
-      // We were looking for the end, we got it.
-      return end;
-    }
-    errors.add("Couldn't find: " + toFind + ", "+ wikiText.substring(start));
-    if (firstNewline != -1) {
-      return firstNewline;
-    }
-    return end;
-  }
-
-  private void addFunctionArg(final boolean insideFunction, final int matchStart) {
-    if (firstUnescapedPipePos == -1) {
-      firstUnescapedPipePos = lastUnescapedPipePos = matchStart;
-    } else if (insideFunction) {
-      if (lastUnescapedEqualsPos > lastUnescapedPipePos) {
-        final String key = wikiText.substring(lastUnescapedPipePos + 1, lastUnescapedEqualsPos);
-        final String value = wikiText.substring(lastUnescapedEqualsPos + 1, matchStart);
-        namedArgs.put(trimNewlines(key), trimNewlines(value));
-      } else {
-        final String value = wikiText.substring(lastUnescapedPipePos + 1, matchStart);
-        positionArgs.add(trimNewlines(value));
-      }
-    }
-    lastUnescapedPipePos = matchStart;
-  }
-  
-  static final String trimNewlines(String s) {
-    while (s.startsWith("\n")) {
-      s = s.substring(1);
-    }
-    while (s.endsWith("\n")) {
-      s = s.substring(0, s.length() - 1);
-    }
-    return s.replace('\n', ' ');
-  }
-
-  static int safeIndexOf(final String s, final int start, final String target, final String backup) {
-    int close = s.indexOf(target, start);
-    if (close != -1) {
-      // Don't step over a \n.
-      return close + (target.equals("\n") ? 0 : target.length());
-    }
-    close = s.indexOf(backup, start);
-    if (close != -1) {
-      return close + (backup.equals("\n") ? 0 : backup.length());
-    }
-    return s.length();
-  }
-
-  public static String toPlainText(final String wikiText) {
-    final WikiTokenizer wikiTokenizer = new WikiTokenizer(wikiText);
-    final StringBuilder builder = new StringBuilder();
-    while (wikiTokenizer.nextToken() != null) {
-      if (wikiTokenizer.isPlainText()) {
-        builder.append(wikiTokenizer.token());
-      } else if (wikiTokenizer.isWikiLink()) {
-        builder.append(wikiTokenizer.wikiLinkText());
-      } else if (wikiTokenizer.isNewline()) {
-        builder.append("\n");
-      } else if (wikiTokenizer.isFunction()) {
-        builder.append(wikiTokenizer.token());
-      }
-    }
-    return builder.toString();
-  }
-
-  public static StringBuilder appendFunction(final StringBuilder builder, final String name, List<String> args,
-      final Map<String, String> namedArgs) {
-    builder.append(name);
-    for (final String arg : args) {
-      builder.append("|").append(arg);
-    }
-    for (final Map.Entry<String, String> entry : namedArgs.entrySet()) {
-      builder.append("|").append(entry.getKey()).append("=").append(entry.getValue());
-    }
-    return builder;
-  }
+    public static StringBuilder appendFunction(final StringBuilder builder, final String name, List<String> args,
+            final Map<String, String> namedArgs) {
+        builder.append(name);
+        for (final String arg : args) {
+            builder.append("|").append(arg);
+        }
+        for (final Map.Entry<String, String> entry : namedArgs.entrySet()) {
+            builder.append("|").append(entry.getKey()).append("=").append(entry.getValue());
+        }
+        return builder;
+    }
 
 }