* Helper class for match pairs of characters.
*/
public class PHPPairMatcher implements ICharacterPairMatcher {
-
-
- public static final int LEFT= 1;
- public static final int RIGHT= 2;
-
-
- protected char[] fPairs;
- protected IDocument fDocument;
- protected int fOffset;
-
- protected int fStartPos;
- protected int fEndPos;
- protected int fAnchor;
-
- protected PHPCodeReader fReader= new PHPCodeReader();
-
-
- public PHPPairMatcher(char[] pairs) {
- fPairs= pairs;
- }
-
- /*
- * @see org.eclipse.jface.text.source.ICharacterPairMatcher#clear()
- */
- public void clear() {
- if (fReader != null) {
- try {
- fReader.close();
- } catch (IOException x) {
- // ignore
- }
- }
- }
-
- public IRegion match(IDocument document, int offset) {
-
- fOffset= offset;
-
- if (fOffset < 0)
- return null;
-
- fDocument= document;
-
- if (matchPairsAt() && fStartPos != fEndPos)
- return new Region(fStartPos, fEndPos - fStartPos + 1);
-
- return null;
- }
-
- public int getAnchor() {
- return fAnchor;
- }
-
- public void dispose() {
- fDocument= null;
- if (fReader != null) {
- try {
- fReader.close();
- } catch (IOException x) {
- // ignore
- }
- fReader= null;
- }
- }
-
- protected boolean matchPairsAt() {
-
- int i;
- int pairIndex1= fPairs.length;
- int pairIndex2= fPairs.length;
-
- fStartPos= -1;
- fEndPos= -1;
-
- // get the chars preceding and following the start position
- try {
-
- char prevChar= fDocument.getChar(Math.max(fOffset - 1, 0));
- char nextChar= fDocument.getChar(fOffset);
-
- // search for opening peer character next to the activation point
- for (i= 0; i < fPairs.length; i= i + 2) {
- if (nextChar == fPairs[i]) {
- fStartPos= fOffset;
- pairIndex1= i;
- } else if (prevChar == fPairs[i]) {
- fStartPos= fOffset - 1;
- pairIndex1= i;
- }
- }
-
- // search for closing peer character next to the activation point
- for (i= 1; i < fPairs.length; i= i + 2) {
- if (prevChar == fPairs[i]) {
- fEndPos= fOffset - 1;
- pairIndex2= i;
- } else if (nextChar == fPairs[i]) {
- fEndPos= fOffset;
- pairIndex2= i;
- }
- }
-
- if (fEndPos > -1) {
- fAnchor= RIGHT;
- fStartPos= searchForOpeningPeer(fEndPos, fPairs[pairIndex2 - 1], fPairs[pairIndex2], fDocument);
- if (fStartPos > -1)
- return true;
- else
- fEndPos= -1;
- } else if (fStartPos > -1) {
- fAnchor= LEFT;
- fEndPos= searchForClosingPeer(fStartPos, fPairs[pairIndex1], fPairs[pairIndex1 + 1], fDocument);
- if (fEndPos > -1)
- return true;
- else
- fStartPos= -1;
- }
-
- } catch (BadLocationException x) {
- } catch (IOException x) {
- }
-
- return false;
- }
-
- protected int searchForClosingPeer(int offset, int openingPeer, int closingPeer, IDocument document) throws IOException {
-
- fReader.configureForwardReader(document, offset + 1, document.getLength(), true, true);
-
- int stack= 1;
- int c= fReader.read();
- while (c != PHPCodeReader.EOF) {
- if (c == openingPeer && c != closingPeer)
- stack++;
- else if (c == closingPeer)
- stack--;
-
- if (stack == 0)
- return fReader.getOffset();
-
- c= fReader.read();
- }
-
- return -1;
- }
-
- protected int searchForOpeningPeer(int offset, int openingPeer, int closingPeer, IDocument document) throws IOException {
-
- fReader.configureBackwardReader(document, offset, true, true);
-
- int stack= 1;
- int c= fReader.read();
- while (c != PHPCodeReader.EOF) {
- if (c == closingPeer && c != openingPeer)
- stack++;
- else if (c == openingPeer)
- stack--;
-
- if (stack == 0)
- return fReader.getOffset();
-
- c= fReader.read();
- }
-
- return -1;
- }
-}
+ protected char[] fPairs;
+
+ protected IDocument fDocument;
+
+ protected int fOffset;
+
+ protected int fStartPos;
+
+ protected int fEndPos;
+
+ protected int fAnchor;
+
+ protected PHPCodeReader fReader = new PHPCodeReader();
+
+ public PHPPairMatcher(char[] pairs) {
+ fPairs = pairs;
+ }
+
+ /*
+ * @see org.eclipse.jface.text.source.ICharacterPairMatcher#clear()
+ */
+ public void clear() {
+ if (fReader != null) {
+ try {
+ fReader.close();
+ } catch (IOException x) {
+ // ignore
+ }
+ }
+ }
+
+ public IRegion match(IDocument document, int offset) {
+
+ fOffset = offset;
+
+ if (fOffset < 0)
+ return null;
+
+ fDocument = document;
+
+ if (matchPairsAt() && fStartPos != fEndPos)
+ return new Region(fStartPos, fEndPos - fStartPos + 1);
+
+ return null;
+ }
+
+ public int getAnchor() {
+ return fAnchor;
+ }
+
+ public void dispose() {
+ fDocument = null;
+ if (fReader != null) {
+ try {
+ fReader.close();
+ } catch (IOException x) {
+ // ignore
+ }
+ fReader = null;
+ }
+ }
+
+ protected boolean matchPairsAt() {
+
+ int i;
+ int pairIndex1 = fPairs.length;
+ int pairIndex2 = fPairs.length;
+
+ fStartPos = -1;
+ fEndPos = -1;
+
+ // get the chars preceding and following the start position
+ try {
+
+ char prevChar = fDocument.getChar(Math.max(fOffset - 1, 0));
+ char nextChar = fDocument.getChar(fOffset);
+
+ // search for opening peer character next to the activation point
+ for (i = 0; i < fPairs.length; i = i + 2) {
+ if (nextChar == fPairs[i]) {
+ fStartPos = fOffset;
+ pairIndex1 = i;
+ } else if (prevChar == fPairs[i]) {
+ fStartPos = fOffset - 1;
+ pairIndex1 = i;
+ }
+ }
+
+ // search for closing peer character next to the activation point
+ for (i = 1; i < fPairs.length; i = i + 2) {
+ if (prevChar == fPairs[i]) {
+ fEndPos = fOffset - 1;
+ pairIndex2 = i;
+ } else if (nextChar == fPairs[i]) {
+ fEndPos = fOffset;
+ pairIndex2 = i;
+ }
+ }
+
+ if (fEndPos > -1) {
+ fAnchor = RIGHT;
+ fStartPos = searchForOpeningPeer(fEndPos, fPairs[pairIndex2 - 1], fPairs[pairIndex2], fDocument);
+ if (fStartPos > -1)
+ return true;
+ else
+ fEndPos = -1;
+ } else if (fStartPos > -1) {
+ fAnchor = LEFT;
+ fEndPos = searchForClosingPeer(fStartPos, fPairs[pairIndex1], fPairs[pairIndex1 + 1], fDocument);
+ if (fEndPos > -1)
+ return true;
+ else
+ fStartPos = -1;
+ }
+
+ } catch (BadLocationException x) {
+ } catch (IOException x) {
+ }
+
+ return false;
+ }
+
+ protected int searchForClosingPeer(int offset, int openingPeer, int closingPeer, IDocument document) throws IOException {
+
+ fReader.configureForwardReader(document, offset + 1, document.getLength(), true, true);
+
+ int stack = 1;
+ int c = fReader.read();
+ while (c != PHPCodeReader.EOF) {
+ if (c == openingPeer && c != closingPeer)
+ stack++;
+ else if (c == closingPeer)
+ stack--;
+
+ if (stack == 0)
+ return fReader.getOffset();
+
+ c = fReader.read();
+ }
+
+ return -1;
+ }
+
+ protected int searchForOpeningPeer(int offset, int openingPeer, int closingPeer, IDocument document) throws IOException {
+
+ fReader.configureBackwardReader(document, offset, true, true);
+
+ int stack = 1;
+ int c = fReader.read();
+ while (c != PHPCodeReader.EOF) {
+ if (c == closingPeer && c != openingPeer)
+ stack++;
+ else if (c == openingPeer)
+ stack--;
+
+ if (stack == 0)
+ return fReader.getOffset();
+
+ c = fReader.read();
+ }
+
+ return -1;
+ }
+}
\ No newline at end of file
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