+++ /dev/null
-package net.sourceforge.phpdt.internal.ui.text;
-
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-
-import java.io.IOException;
-
-import org.eclipse.jface.text.BadLocationException;
-import org.eclipse.jface.text.IDocument;
-import org.eclipse.jface.text.IRegion;
-import org.eclipse.jface.text.Region;
-import org.eclipse.jface.text.source.ICharacterPairMatcher;
-
-/**
- * Helper class for match pairs of characters.
- */
-public class PHPPairMatcher implements ICharacterPairMatcher {
- protected char[] fPairs; // Holds the brace pairs
-
- protected IDocument fDocument;
-
- protected int fOffset; // The current text position from which we search
- protected int nPosOpening; // The position of the opening brace
- protected int nPosClosing; // The position of the closing brace
- protected int fAnchor;
-
- protected PHPCodeReader fReader = new PHPCodeReader();
-
- /**
- *
- * @param pairs The array of opening and closing braces we need for searching the brace matching
- */
-
- 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
- }
- }
- }
-
- /**
- * Try to find a matching pair of opening and closing braces
- *
- * @return Returns a region if a matching pair was found.
- */
-
- public IRegion match (IDocument document, int offset) {
- fOffset = offset;
-
- if (fOffset < 0) {
- return null;
- }
-
- fDocument = document;
-
- if (matchPairsAt ()) { // If we found a pair of opening and closing braces
- return new Region (nPosOpening, nPosClosing - nPosOpening + 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;
- }
- }
-
- /**
- * Take the character from the current text position, checks for opening or closing braces and search for
- * the corresponding opening or closing brace
- *
- * @return True if a pair was found
- */
- protected boolean matchPairsAt() {
- int i;
- int nIndexOpen = fPairs.length; // Opening index
- int nIndexClose = fPairs.length;
- char cCurrentChar; // The character from the current text position
- char cPrevChar; // The character from the previouis text position, just
- // for the case the user pointed the cursor after the opening or closing brace
-
- nPosOpening = -1;
- nPosClosing = -1;
-
- // get the chars preceding and following the start position
- try {
- cCurrentChar = fDocument.getChar (fOffset);
- cPrevChar = fDocument.getChar (Math.max (fOffset - 1, 0));
-
- // search for opening peer character next to the activation point
- for (i = 0; i < fPairs.length; i = i + 2) { // The opening brace is on even indexes
- if (cCurrentChar == fPairs[i]) { // If the current character matches an opening brace
- nPosOpening = fOffset; // Remember the character position
- nIndexOpen = i; // and remember the opening brace for which we search the closing one
- }
- else if (cPrevChar == fPairs[i]) { // If the current character is not an opening, but the previous character is an opening brace
- nPosOpening = fOffset - 1; // Remember the character position
- nIndexOpen = i; // and remember the opening brace for which we search the closing one
- }
- }
-
- // search for closing peer character next to the activation point
-
- if (nPosOpening < 0) { // If we didn't find an opening brace
- for (i = 1; i < fPairs.length; i = i + 2) { // The closing brace is on odd indexes
- if (cCurrentChar == fPairs[i]) { // If the current character matches an closing brace
- nPosClosing = fOffset; // Remember the character position
- nIndexClose = i; // and remember the opening brace for which we search the closing one
- }
- else if (cPrevChar == fPairs[i]) { // If the current character is not an opening, but the previous character is an opening brace
- nPosClosing = fOffset - 1; // Remember the character position
- nIndexClose = i; // and remember the opening brace for which we search the closing one
- }
- }
- }
-
- if (nPosClosing > -1) { // If we found a closing brace on current position (or before)
- fAnchor = RIGHT;
- nPosOpening = searchForOpeningPeer (nPosClosing, fPairs[nIndexClose - 1], fPairs[nIndexClose], fDocument);
-
- return (nPosOpening > -1); // If we found a opening brace, return true
- }
- else if (nPosOpening > -1) { // If we found a opening brace on current position (or before)
- fAnchor = LEFT;
- nPosClosing = searchForClosingPeer (nPosOpening, fPairs[nIndexOpen], fPairs[nIndexOpen + 1], fDocument);
-
- return (nPosClosing > -1); // If we found an closing brace for this opening brace return true
- }
- }
- catch (BadLocationException x) {
- }
- catch (IOException x) {
- }
-
- return false;
- }
-
- /**
- *
- * @param offset The search start position
- * @param openingPeer The opening brace we had found
- * @param closingPeer The closing brace we search for
- * @param document The document we currently are in
- *
- * @return
- *
- * @throws IOException
- */
- protected int searchForClosingPeer (int offset, char openingPeer,
- char closingPeer, IDocument document) throws IOException {
- fReader.configureForwardReader (document, offset + 1, document.getLength(), true, true);
-
- int stack = 1; // As we have already the opening brace
- int c = fReader.read (); // Read character on position one after the opening brace
-
- while (c != PHPCodeReader.EOF) { // As long as we are not at the end
- if ((c == openingPeer) && // If character is opening brace again
- (c != closingPeer)) { // and not a closing brace (how could it be?)
- stack++; // put it on stack
- }
- else if (c == closingPeer) { // If it's a closing brace
- stack--; // Decrement level counter
- }
-
- if (stack == 0) { // If we found the matching closing brace
- return fReader.getOffset (); // return the position of this closing brace
- }
-
- c = fReader.read (); // Read the next character
- }
-
- return -1;
- }
-
- /**
- *
- * @param offset The search start position
- * @param openingPeer The opening brace we search for
- * @param closingPeer The closing brace we search for
- * @param document The document we currently are in
- *
- * @return
- *
- * @throws IOException
- */
- protected int searchForOpeningPeer (int offset, char openingPeer,
- char closingPeer, IDocument document) throws IOException {
- fReader.configureBackwardReader (document, offset, true, true);
-
- int stack = 1; // As we have already the opening brace
- int c = fReader.read (); // Read character on position one before the closing brace
-
- while (c != PHPCodeReader.EOF) { // As long as we are not at the start of text
- if ((c == closingPeer) && // If character is closing brace again
- (c != openingPeer)) { // and not a opening brace (how could it be?)
- stack++; // put it on stack
- }
- else if (c == openingPeer) { // If it's a opening brace
- stack--; // Decrement level counter
- }
-
- if (stack == 0) { // If we found the matching closing brace
- return fReader.getOffset (); // return the position of this closing brace
- }
-
- c = fReader.read (); // Read the previous character
- }
-
- return -1;
- }
-}
git://secure.phpeclipse.com / phpeclipse.git / blobdiff