/* The following code was generated by JFlex 1.4.3 on 20/12/10 12:53 */
//CHECKSTYLE:OFF
/*
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org
This file is part of GeoGebra.
This code has been written initially for Scilab (http://www.scilab.org/).
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation.
*/
package org.geogebra.desktop.gui.editor;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import org.geogebra.common.util.Charsets;
/**
* This class is a scanner generated by <a href="http://www.jflex.de/">JFlex</a>
* 1.4.3 on 20/12/10 12:53 from the specification file <tt>matching.jflex</tt>
*/
public final class MatchingBlockScanner {
/** This character denotes the end of file */
public static final int YYEOF = -1;
/** initial size of the lookahead buffer */
private static final int ZZ_BUFFERSIZE = 256;
/** lexical states */
public static final int OPENCLOSE = 6;
public static final int LR = 2;
public static final int YYINITIAL = 0;
public static final int CLOSEOPEN = 8;
public static final int RL = 4;
/**
* ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l
* ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l at the
* beginning of a line l is of the form l = 2*k, k a non negative integer
*/
private static final int ZZ_LEXSTATE[] = { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4 };
/**
* Translates characters to character classes
*/
private static final String ZZ_CMAP_PACKED = "\12\1\1\1\2\1\1\1\24\1\1\0\5\1\1\2\1\3\61\1"
+ "\1\2\1\1\1\3\35\1\1\2\1\1\1\3\uff82\1";
/**
* Translates characters to character classes
*/
private static final char[] ZZ_CMAP = zzUnpackCMap(ZZ_CMAP_PACKED);
/**
* Translates DFA states to action switch labels.
*/
private static final int[] ZZ_ACTION = zzUnpackAction();
private static final String ZZ_ACTION_PACKED_0 = "\5\0\2\1\1\2\1\3\1\0";
private static int[] zzUnpackAction() {
int[] result = new int[10];
int offset = 0;
offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
return result;
}
private static int zzUnpackAction(String packed, int offset, int[] result) {
int i = 0; /* index in packed string */
int j = offset; /* index in unpacked array */
int l = packed.length();
while (i < l) {
int count = packed.charAt(i++);
int value = packed.charAt(i++);
do {
result[j++] = value;
} while (--count > 0);
}
return j;
}
/* error codes */
private static final int ZZ_UNKNOWN_ERROR = 0;
private static final int ZZ_NO_MATCH = 1;
private static final int ZZ_PUSHBACK_2BIG = 2;
/* error messages for the codes above */
private static final String ZZ_ERROR_MSG[] = {
"Unkown internal scanner error", "Error: could not match input",
"Error: pushback value was too large" };
/** the input device */
private java.io.Reader zzReader;
/** the current state of the DFA */
private int zzState;
/** the current lexical state */
private int zzLexicalState = YYINITIAL;
/**
* this buffer contains the current text to be matched and is the source of
* the yytext() string
*/
private char zzBuffer[] = new char[ZZ_BUFFERSIZE];
/** the textposition at the last accepting state */
private int zzMarkedPos;
/** the current text position in the buffer */
private int zzCurrentPos;
/** startRead marks the beginning of the yytext() string in the buffer */
private int zzStartRead;
/**
* endRead marks the last character in the buffer, that has been read from
* input
*/
private int zzEndRead;
/** number of newlines encountered up to the start of the matched text */
private int yyline;
/** the number of characters up to the start of the matched text */
private int yychar;
/** zzAtEOF == true <=> the scanner is at the EOF */
private boolean zzAtEOF;
/* user code: */
private Document doc;
private Element elem;
private int start;
private int end;
public MatchingBlockScanner(Document doc) {
this.doc = doc;
this.elem = doc.getDefaultRootElement();
}
public MatchingPositions getMatchingBlock(int pos, boolean lr) {
int p1, s = 1;
try {
if (lr) {
start = pos;
end = doc.getEndPosition().getOffset();
yyreset(new StringReader(doc.getText(start, end - start)));
yybegin(OPENCLOSE);
if (yylex() != 1) {
return null;
}
p1 = pos + yylength();
yybegin(LR);
} else {
start = pos - 1;
end = 0;
String str = new StringBuilder(
doc.getText(end, start - end + 1)).reverse().toString();
yyreset(new StringReader(str));
yybegin(CLOSEOPEN);
if (yylex() != 1) {
return null;
}
p1 = pos - yylength();
yybegin(RL);
}
do {
if (yylex() == 0) {
s--;
} else {
s++;
}
} while (zzMarkedPos != 0 && s != 0);
} catch (Exception e) {
return null;
}
if (s == 0) {
if (lr) {
return new MatchingPositions(pos, p1, pos + yychar,
pos + yychar + yylength());
}
return new MatchingPositions(p1, pos, pos - yychar - yylength(),
pos - yychar);
}
return null;
}
public final static class MatchingPositions {
public int firstB;
public int firstE;
public int secondB;
public int secondE;
private MatchingPositions(int x1, int x2, int y1, int y2) {
firstB = x1;
firstE = x2;
secondB = y1;
secondE = y2;
}
}
/**
* Creates a new scanner There is also a java.io.InputStream version of this
* constructor.
*
* @param in
* the java.io.Reader to read input from.
*/
public MatchingBlockScanner(java.io.Reader in) {
this.zzReader = in;
}
/**
* Creates a new scanner. There is also java.io.Reader version of this
* constructor.
*
* @param in
* the java.io.Inputstream to read input from.
* @throws UnsupportedEncodingException
*/
public MatchingBlockScanner(java.io.InputStream in)
throws UnsupportedEncodingException {
this(new java.io.InputStreamReader(in, Charsets.UTF_8));
}
/**
* Unpacks the compressed character translation table.
*
* @param packed
* the packed character translation table
* @return the unpacked character translation table
*/
private static char[] zzUnpackCMap(String packed) {
char[] map = new char[0x10000];
int i = 0; /* index in packed string */
int j = 0; /* index in unpacked array */
while (i < 36) {
int count = packed.charAt(i++);
char value = packed.charAt(i++);
do {
map[j++] = value;
} while (--count > 0);
}
return map;
}
/**
* Refills the input buffer.
*
* @return <code>false</code>, iff there was new input.
*
* @exception java.io.IOException
* if any I/O-Error occurs
*/
private boolean zzRefill() throws java.io.IOException {
/* first: make room (if you can) */
if (zzStartRead > 0) {
System.arraycopy(zzBuffer, zzStartRead, zzBuffer, 0,
zzEndRead - zzStartRead);
/* translate stored positions */
zzEndRead -= zzStartRead;
zzCurrentPos -= zzStartRead;
zzMarkedPos -= zzStartRead;
zzStartRead = 0;
}
/* is the buffer big enough? */
if (zzCurrentPos >= zzBuffer.length) {
/* if not: blow it up */
char newBuffer[] = new char[zzCurrentPos * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
}
/* finally: fill the buffer with new input */
int numRead = zzReader.read(zzBuffer, zzEndRead,
zzBuffer.length - zzEndRead);
if (numRead > 0) {
zzEndRead += numRead;
return false;
}
// unlikely but not impossible: read 0 characters, but not at end of
// stream
if (numRead == 0) {
int c = zzReader.read();
if (c == -1) {
return true;
}
zzBuffer[zzEndRead++] = (char) c;
return false;
}
// numRead < 0
return true;
}
/**
* Closes the input stream.
*/
public final void yyclose() throws java.io.IOException {
zzAtEOF = true; /* indicate end of file */
zzEndRead = zzStartRead; /* invalidate buffer */
if (zzReader != null) {
zzReader.close();
}
}
/**
* Resets the scanner to read from a new input stream. Does not close the
* old reader.
*
* All internal variables are reset, the old input stream <b>cannot</b> be
* reused (internal buffer is discarded and lost). Lexical state is set to
* <tt>ZZ_INITIAL</tt>.
*
* @param reader
* the new input stream
*/
public final void yyreset(java.io.Reader reader) {
zzReader = reader;
zzAtEOF = false;
zzEndRead = zzStartRead = 0;
zzCurrentPos = zzMarkedPos = 0;
yyline = yychar = 0;
zzLexicalState = YYINITIAL;
}
/**
* Returns the current lexical state.
*/
public final int yystate() {
return zzLexicalState;
}
/**
* Enters a new lexical state
*
* @param newState
* the new lexical state
*/
public final void yybegin(int newState) {
zzLexicalState = newState;
}
/**
* Returns the text matched by the current regular expression.
*/
public final String yytext() {
return new String(zzBuffer, zzStartRead, zzMarkedPos - zzStartRead);
}
/**
* Returns the character at position <tt>pos</tt> from the matched text.
*
* It is equivalent to yytext().charAt(pos), but faster
*
* @param pos
* the position of the character to fetch. A value from 0 to
* yylength()-1.
*
* @return the character at position pos
*/
public final char yycharat(int pos) {
return zzBuffer[zzStartRead + pos];
}
/**
* Returns the length of the matched text region.
*/
public final int yylength() {
return zzMarkedPos - zzStartRead;
}
/**
* Reports an error that occured while scanning.
*
* In a wellformed scanner (no or only correct usage of yypushback(int) and
* a match-all fallback rule) this method will only be called with things
* that "Can't Possibly Happen". If this method is called, something is
* seriously wrong (e.g. a JFlex bug producing a faulty scanner etc.).
*
* Usual syntax/scanner level error handling should be done in error
* fallback rules.
*
* @param errorCode
* the code of the errormessage to display
*/
private static void zzScanError(int errorCode) {
String message;
try {
message = ZZ_ERROR_MSG[errorCode];
} catch (ArrayIndexOutOfBoundsException e) {
message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
}
throw new Error(message);
}
/**
* Pushes the specified amount of characters back into the input stream.
*
* They will be read again by then next call of the scanning method
*
* @param number
* the number of characters to be read again. This number must
* not be greater than yylength()!
*/
public void yypushback(int number) {
if (number > yylength()) {
zzScanError(ZZ_PUSHBACK_2BIG);
}
zzMarkedPos -= number;
}
/**
* Resumes scanning until the next regular expression is matched, the end of
* input is encountered or an I/O-Error occurs.
*
* @return the next token
* @exception java.io.IOException
* if any I/O-Error occurs
*/
public int yylex() throws java.io.IOException {
int zzInput;
int zzAction;
// cached fields:
int zzCurrentPosL;
int zzMarkedPosL;
int zzEndReadL = zzEndRead;
char[] zzBufferL = zzBuffer;
char[] zzCMapL = ZZ_CMAP;
while (true) {
zzMarkedPosL = zzMarkedPos;
yychar += zzMarkedPosL - zzStartRead;
zzAction = -1;
zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
zzState = ZZ_LEXSTATE[zzLexicalState];
zzForAction: {
while (true) {
if (zzCurrentPosL < zzEndReadL) {
zzInput = zzBufferL[zzCurrentPosL++];
} else if (zzAtEOF) {
zzInput = YYEOF;
break zzForAction;
} else {
// store back cached positions
zzCurrentPos = zzCurrentPosL;
zzMarkedPos = zzMarkedPosL;
boolean eof = zzRefill();
// get translated positions and possibly new buffer
zzCurrentPosL = zzCurrentPos;
zzMarkedPosL = zzMarkedPos;
zzBufferL = zzBuffer;
zzEndReadL = zzEndRead;
if (eof) {
zzInput = YYEOF;
break zzForAction;
}
zzInput = zzBufferL[zzCurrentPosL++];
}
zzInput = zzCMapL[zzInput];
boolean zzIsFinal = false;
boolean zzNoLookAhead = false;
zzForNext: {
switch (zzState) {
case 1:
switch (zzInput) {
case 1:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 6;
break zzForNext;
case 2:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 7;
break zzForNext;
case 3:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 8;
break zzForNext;
default:
zzIsFinal = true;
zzState = 5;
break zzForNext;
}
case 2:
switch (zzInput) {
case 1:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 6;
break zzForNext;
case 3:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 7;
break zzForNext;
case 2:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 8;
break zzForNext;
default:
zzIsFinal = true;
zzState = 5;
break zzForNext;
}
case 3:
switch (zzInput) {
case 2:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 7;
break zzForNext;
default:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 8;
break zzForNext;
}
case 4:
switch (zzInput) {
case 3:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 7;
break zzForNext;
default:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 8;
break zzForNext;
}
case 5:
switch (zzInput) {
case 0:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 6;
break zzForNext;
default:
zzState = 9;
break zzForNext;
}
case 9:
switch (zzInput) {
case 0:
zzIsFinal = true;
zzNoLookAhead = true;
zzState = 6;
break zzForNext;
default:
break zzForNext;
}
default:
// if this is ever reached, there is a serious bug
// in JFlex
zzScanError(ZZ_UNKNOWN_ERROR);
break;
}
}
if (zzIsFinal) {
zzAction = zzState;
zzMarkedPosL = zzCurrentPosL;
if (zzNoLookAhead) {
break zzForAction;
}
}
}
}
// store back cached position
zzMarkedPos = zzMarkedPosL;
switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
case 3: {
return 0;
}
case 4:
break;
case 2: {
return 1;
}
case 5:
break;
case 1: {
}
case 6:
break;
default:
if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
zzAtEOF = true;
{
return -1;
}
}
zzScanError(ZZ_NO_MATCH);
}
}
}
}