diff options
Diffstat (limited to 'bundles/org.eclipse.wst.html.ui/src/org/eclipse/wst/html/ui/internal/text/JavaCodeReader.java')
| -rw-r--r-- | bundles/org.eclipse.wst.html.ui/src/org/eclipse/wst/html/ui/internal/text/JavaCodeReader.java | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/bundles/org.eclipse.wst.html.ui/src/org/eclipse/wst/html/ui/internal/text/JavaCodeReader.java b/bundles/org.eclipse.wst.html.ui/src/org/eclipse/wst/html/ui/internal/text/JavaCodeReader.java deleted file mode 100644 index e3cace3005..0000000000 --- a/bundles/org.eclipse.wst.html.ui/src/org/eclipse/wst/html/ui/internal/text/JavaCodeReader.java +++ /dev/null @@ -1,244 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2001, 2005 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - * - *******************************************************************************/ -package org.eclipse.wst.html.ui.internal.text; - -// taken from package org.eclipse.jdt.ui.text; - -import java.io.IOException; - -import org.eclipse.jface.text.BadLocationException; -import org.eclipse.jface.text.IDocument; -import org.eclipse.wst.html.ui.internal.derived.SingleCharReader; - -/** - * Reads from a document either forwards or backwards. May be configured to - * skip comments and strings. - */ -class JavaCodeReader 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 JavaCodeReader() { - } - - /** - * 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; - } -} |