diff options
Diffstat (limited to 'bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocLineComparator.java')
| -rw-r--r-- | bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocLineComparator.java | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocLineComparator.java b/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocLineComparator.java deleted file mode 100644 index 80b6409f1..000000000 --- a/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocLineComparator.java +++ /dev/null @@ -1,185 +0,0 @@ -/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-package org.eclipse.compare.internal;
-
-import org.eclipse.jface.text.*;
-import org.eclipse.compare.contentmergeviewer.ITokenComparator;
-import org.eclipse.compare.rangedifferencer.IRangeComparator;
-
-/**
- * Implements the <code>IRangeComparator</code> interface for lines in a document.
- * A <code>DocLineComparator</code> is used as the input for the <code>RangeDifferencer</code>
- * engine to perform a line oriented compare on documents.
- * <p>
- * A <code>DocLineComparator</code> doesn't know anything about line separators because
- * its notion of lines is solely defined in the underlying <code>IDocument</code>.
- */
-public class DocLineComparator implements ITokenComparator {
-
- private IDocument fDocument;
- private int fLineOffset;
- private int fLineCount;
- private int fLength;
- private boolean fIgnoreWhiteSpace;
-
- /**
- * Creates a <code>DocLineComparator</code> for the given document range.
- * ignoreWhiteSpace controls whether comparing lines (in method
- * <code>rangesEqual<code>) should ignore whitespace.
- *
- * @param document the document from which the lines are taken
- * @param region if non-<code>null</code> only lines within this range are taken
- * @param ignoreWhiteSpace if <code>true</code> white space is ignored when comparing lines
- */
- public DocLineComparator(IDocument document, IRegion region, boolean ignoreWhiteSpace) {
-
- fDocument= document;
- fIgnoreWhiteSpace= ignoreWhiteSpace;
-
- fLineOffset= 0;
- if (region != null) {
- fLength= region.getLength();
- int start= region.getOffset();
- try {
- fLineOffset= fDocument.getLineOfOffset(start);
- } catch (BadLocationException ex) {
- }
-
- if (fLength == 0)
- fLineCount= 0;
- else {
- int endLine= fDocument.getNumberOfLines();
- try {
- endLine= fDocument.getLineOfOffset(start + fLength);
- } catch (BadLocationException ex) {
- }
- fLineCount= endLine - fLineOffset + 1;
- }
-
- } else {
- fLength= document.getLength();
- fLineCount= fDocument.getNumberOfLines();
- }
- }
-
- /**
- * Returns the number of lines in the document.
- *
- * @return number of lines
- */
- public int getRangeCount() {
- return fLineCount;
- }
-
- /* (non Javadoc)
- * see ITokenComparator.getTokenStart
- */
- public int getTokenStart(int line) {
- try {
- IRegion r= fDocument.getLineInformation(fLineOffset + line);
- return r.getOffset();
- } catch (BadLocationException ex) {
- return fDocument.getLength();
- }
- }
-
- /* (non Javadoc)
- * Returns the length of the given line.
- * see ITokenComparator.getTokenLength
- */
- public int getTokenLength(int line) {
- return getTokenStart(line+1) - getTokenStart(line);
- }
-
- /**
- * Returns <code>true</code> if a line given by the first index
- * matches a line specified by the other <code>IRangeComparator</code> and index.
- *
- * @param thisIndex the number of the line within this range comparator
- * @param other the range comparator to compare this with
- * @param otherIndex the number of the line within the other comparator
- * @return <code>true</code> if the lines are equal
- */
- public boolean rangesEqual(int thisIndex, IRangeComparator other0, int otherIndex) {
-
- if (other0 != null && other0.getClass() == getClass()) {
- DocLineComparator other= (DocLineComparator) other0;
-
- if (fIgnoreWhiteSpace) {
- String s1= extract(thisIndex);
- String s2= other.extract(otherIndex);
- return compare(s1, s2);
- }
-
- int tlen= getTokenLength(thisIndex);
- int olen= other.getTokenLength(otherIndex);
- if (tlen == olen) {
- String s1= extract(thisIndex);
- String s2= other.extract(otherIndex);
- return s1.equals(s2);
- }
- }
- return false;
- }
-
- /**
- * Aborts the comparison if the number of tokens is too large.
- *
- * @return <code>true</code> to abort a token comparison
- */
- public boolean skipRangeComparison(int length, int max, IRangeComparator other) {
- return false;
- }
-
- //---- private methods
-
- /**
- * Extract a single line from the underlying document without the line separator.
- *
- * @param line the number of the line to extract
- * @return the contents of the line as a String
- */
- private String extract(int line) {
- if (line < fLineCount) {
- try {
- IRegion r= fDocument.getLineInformation(fLineOffset + line);
- return fDocument.get(r.getOffset(), r.getLength());
- } catch(BadLocationException e) {
- }
- }
- return ""; //$NON-NLS-1$
- }
-
- private boolean compare(String s1, String s2) {
- int i1= 0;
- int i2= 0;
- int l1= s1.length();
- int l2= s2.length();
- char c1= ' ';
- char c2= ' ';
- while (i1 < l1 || i2 < l2) {
- if (i1 < l1) {
- c1= s1.charAt(i1);
- if (Character.isWhitespace(c1)) {
- i1++;
- continue;
- }
- }
- if (i2 < l2) {
- c2= s2.charAt(i2);
- if (Character.isWhitespace(c2)) {
- i2++;
- continue;
- }
- }
- if (c1 != c2)
- return false;
- i1++;
- i2++;
- }
- return true;
- }
-}
-
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