+++ /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 net.sourceforge.phpdt.internal.corext.phpdoc.SingleCharReader;
-
-/**
- * Reads from a document either forwards or backwards. May be configured to
- * skip comments and strings.
- */
-public class PHPCodeReader extends SingleCharReader {
-
- /** The EOF character */
- public static final int EOF= -1;
-
- private boolean fSkipComments= false;
- private boolean fSkipStrings= false;
- private boolean fForward= false;
-
- private IDocument fDocument;
- private int fOffset;
-
- private int fEnd= -1;
- private int fCachedLineNumber= -1;
- private int fCachedLineOffset= -1;
-
-
- public PHPCodeReader() {
- }
-
- /**
- * Returns the offset of the last read character. Should only be called after read has been called.
- */
- public int getOffset() {
- return fForward ? fOffset -1 : fOffset;
- }
-
- public void configureForwardReader(IDocument document, int offset, int length, boolean skipComments, boolean skipStrings) throws IOException {
- fDocument= document;
- fOffset= offset;
- fSkipComments= skipComments;
- fSkipStrings= skipStrings;
-
- fForward= true;
- fEnd= Math.min(fDocument.getLength(), fOffset + length);
- }
-
- public void configureBackwardReader(IDocument document, int offset, boolean skipComments, boolean skipStrings) throws IOException {
- fDocument= document;
- fOffset= offset;
- fSkipComments= skipComments;
- fSkipStrings= skipStrings;
-
- fForward= false;
- try {
- fCachedLineNumber= fDocument.getLineOfOffset(fOffset);
- } catch (BadLocationException x) {
- throw new IOException(x.getMessage());
- }
- }
-
- /*
- * @see Reader#close()
- */
- public void close() throws IOException {
- fDocument= null;
- }
-
- /*
- * @see SingleCharReader#read()
- */
- public int read() throws IOException {
- try {
- return fForward ? readForwards() : readBackwards();
- } catch (BadLocationException x) {
- throw new IOException(x.getMessage());
- }
- }
-
- private void gotoCommentEnd() throws BadLocationException {
- while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
- if (current == '*') {
- if (fOffset < fEnd && fDocument.getChar(fOffset) == '/') {
- ++ fOffset;
- return;
- }
- }
- }
- }
-
- private void gotoStringEnd(char delimiter) throws BadLocationException {
- while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
- if (current == '\\') {
- // ignore escaped characters
- ++ fOffset;
- } else if (current == delimiter) {
- return;
- }
- }
- }
-
- private void gotoLineEnd() throws BadLocationException {
- int line= fDocument.getLineOfOffset(fOffset);
- fOffset= fDocument.getLineOffset(line + 1);
- }
-
- private int readForwards() throws BadLocationException {
- while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
-
- switch (current) {
- case '/':
-
- if (fSkipComments && fOffset < fEnd) {
- char next= fDocument.getChar(fOffset);
- if (next == '*') {
- // a comment starts, advance to the comment end
- ++ fOffset;
- gotoCommentEnd();
- continue;
- } else if (next == '/') {
- // '//'-comment starts, advance to the line end
- gotoLineEnd();
- continue;
- }
- }
-
- return current;
-
- case '"':
- case '\'':
-
- if (fSkipStrings) {
- gotoStringEnd(current);
- continue;
- }
-
- return current;
- }
-
- return current;
- }
-
- return EOF;
- }
-
- private void handleSingleLineComment() throws BadLocationException {
- int line= fDocument.getLineOfOffset(fOffset);
- if (line < fCachedLineNumber) {
- fCachedLineNumber= line;
- fCachedLineOffset= fDocument.getLineOffset(line);
- int offset= fOffset;
- while (fCachedLineOffset < offset) {
- char current= fDocument.getChar(offset--);
- if (current == '/' && fCachedLineOffset <= offset && fDocument.getChar(offset) == '/') {
- fOffset= offset;
- return;
- }
- }
- }
- }
-
- private void gotoCommentStart() throws BadLocationException {
- while (0 < fOffset) {
- char current= fDocument.getChar(fOffset--);
- if (current == '*' && 0 <= fOffset && fDocument.getChar(fOffset) == '/')
- return;
- }
- }
-
- private void gotoStringStart(char delimiter) throws BadLocationException {
- while (0 < fOffset) {
- char current= fDocument.getChar(fOffset);
- if (current == delimiter) {
- if ( !(0 <= fOffset && fDocument.getChar(fOffset -1) == '\\'))
- return;
- }
- -- fOffset;
- }
- }
-
- private int readBackwards() throws BadLocationException {
-
- while (0 < fOffset) {
- -- fOffset;
-
- handleSingleLineComment();
-
- char current= fDocument.getChar(fOffset);
- switch (current) {
- case '/':
-
- if (fSkipComments && fOffset > 1) {
- char next= fDocument.getChar(fOffset - 1);
- if (next == '*') {
- // a comment ends, advance to the comment start
- fOffset -= 2;
- gotoCommentStart();
- continue;
- }
- }
-
- return current;
-
- case '"':
- case '\'':
-
- if (fSkipStrings) {
- -- fOffset;
- gotoStringStart(current);
- continue;
- }
-
- return current;
- }
-
- return current;
- }
-
- return EOF;
- }
-}
-
git://secure.phpeclipse.com / phpeclipse.git / blobdiff