diff options
Diffstat (limited to 'core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CPairMatcher.java')
-rw-r--r-- | core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CPairMatcher.java | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CPairMatcher.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CPairMatcher.java deleted file mode 100644 index dc1a057cc5f..00000000000 --- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CPairMatcher.java +++ /dev/null @@ -1,192 +0,0 @@ -package org.eclipse.cdt.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; - - -/** - * Helper class for match pairs of characters. - */ -public class CPairMatcher { - - - 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 CCodeReader fReader= new CCodeReader(); - - - public CPairMatcher(char[] pairs) { - fPairs= pairs; - } - - 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 { - - - /* - A quick hack to get around the fact that we can't bracket - match on the very first element of a document. We make the - character to match a null character which is unlikely to match. - */ - char prevChar= (fOffset > 0) ? fDocument.getChar(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 != CCodeReader.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 != CCodeReader.EOF) { - if (c == closingPeer && c != openingPeer) - stack++; - else if (c == openingPeer) - stack--; - - if (stack == 0) - return fReader.getOffset(); - - c= fReader.read(); - } - - return -1; - } -}
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