X-Git-Url: http://secure.phpeclipse.com diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/FastJavaPartitionScanner.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/FastJavaPartitionScanner.java new file mode 100644 index 0000000..8653b77 --- /dev/null +++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/FastJavaPartitionScanner.java @@ -0,0 +1,632 @@ +/******************************************************************************* + * Copyright (c) 2000, 2004 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Common Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/cpl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +package net.sourceforge.phpdt.internal.ui.text; + +import net.sourceforge.phpeclipse.ui.text.rules.AbstractPartitioner; + +import org.eclipse.jface.text.Assert; +import org.eclipse.jface.text.IDocument; +import org.eclipse.jface.text.rules.ICharacterScanner; +import org.eclipse.jface.text.rules.IPartitionTokenScanner; +import org.eclipse.jface.text.rules.IToken; +import org.eclipse.jface.text.rules.Token; + +/** + * This scanner recognizes the JavaDoc comments, Java multi line comments, Java + * single line comments, Java strings. + */ +public class FastJavaPartitionScanner implements IPartitionTokenScanner, + IPHPPartitions { + + // states + private static final int PHP = 0; + + private static final int SINGLE_LINE_COMMENT = 1; + + private static final int MULTI_LINE_COMMENT = 2; + + private static final int PHPDOC = 3; + + private static final int STRING_DQ = 4; + + private static final int STRING_SQ = 5; + + private static final int STRING_HEREDOC = 6; + + // beginning of prefixes and postfixes + private static final int NONE = 0; + + private static final int BACKSLASH = 1; // postfix for STRING_DQ and + // CHARACTER + + private static final int SLASH = 2; // prefix for SINGLE_LINE or MULTI_LINE + // or + + // JAVADOC + + private static final int SLASH_STAR = 3; // prefix for MULTI_LINE_COMMENT + // or + + // JAVADOC + + private static final int SLASH_STAR_STAR = 4; // prefix for + // MULTI_LINE_COMMENT + + // or JAVADOC + + private static final int STAR = 5; // postfix for MULTI_LINE_COMMENT or + + // JAVADOC + + private static final int CARRIAGE_RETURN = 6; // postfix for STRING_DQ, + + // CHARACTER and + // SINGLE_LINE_COMMENT + + // private static final int HEREDOC = 7; + + /** The scanner. */ + private final BufferedDocumentScanner fScanner = new BufferedDocumentScanner( + 1000); // faster + + // implementation + + /** The offset of the last returned token. */ + private int fTokenOffset; + + /** The length of the last returned token. */ + private int fTokenLength; + + /** The state of the scanner. */ + private int fState; + + /** The last significant characters read. */ + private int fLast; + + /** The amount of characters already read on first call to nextToken(). */ + private int fPrefixLength; + + // emulate JavaPartitionScanner + private boolean fEmulate = false; + + private int fJavaOffset; + + private int fJavaLength; + + private final IToken[] fTokens = new IToken[] { new Token(null), + new Token(PHP_SINGLELINE_COMMENT), + new Token(PHP_MULTILINE_COMMENT), new Token(PHP_PHPDOC_COMMENT), + new Token(PHP_STRING_DQ), new Token(PHP_STRING_SQ), + new Token(PHP_STRING_HEREDOC) }; + + public FastJavaPartitionScanner(boolean emulate) { + fEmulate = emulate; + } + + public FastJavaPartitionScanner() { + this(false); + } + + /* + * @see org.eclipse.jface.text.rules.ITokenScanner#nextToken() + */ + public IToken nextToken() { + + // emulate JavaPartitionScanner + if (fEmulate) { + if (fJavaOffset != -1 + && fTokenOffset + fTokenLength != fJavaOffset + fJavaLength) { + fTokenOffset += fTokenLength; + return fTokens[PHP]; + } else { + fJavaOffset = -1; + fJavaLength = 0; + } + } + + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + + while (true) { + final int ch = fScanner.read(); + + // characters + switch (ch) { + case ICharacterScanner.EOF: + if (fTokenLength > 0) { + fLast = NONE; // ignore last + return preFix(fState, PHP, NONE, 0); + + } else { + fLast = NONE; + fPrefixLength = 0; + return Token.EOF; + } + + case '\r': + // emulate JavaPartitionScanner + if (!fEmulate && fLast != CARRIAGE_RETURN) { + fLast = CARRIAGE_RETURN; + fTokenLength++; + continue; + + } else { + + switch (fState) { + case SINGLE_LINE_COMMENT: + // case CHARACTER: + // case STRING_DQ: + // case STRING_SQ: + if (fTokenLength > 0) { + IToken token = fTokens[fState]; + + // emulate JavaPartitionScanner + if (fEmulate) { + fTokenLength++; + fLast = NONE; + fPrefixLength = 0; + } else { + fLast = CARRIAGE_RETURN; + fPrefixLength = 1; + } + + fState = PHP; + return token; + + } else { + consume(); + continue; + } + + default: + consume(); + continue; + } + } + + case '\n': + switch (fState) { + case SINGLE_LINE_COMMENT: + // case CHARACTER: + // case STRING_DQ: + // case STRING_SQ: + // assert(fTokenLength > 0); + return postFix(fState); + + default: + consume(); + continue; + } + + case '?': + if (fState == SINGLE_LINE_COMMENT) { + int nextch = fScanner.read(); + if (nextch == '>') { + //

This is an example.

+ fTokenLength--; + fScanner.unread(); + fScanner.unread(); + return postFix(fState); + } else { + // bug #1404228: Crash on + if (nextch != ICharacterScanner.EOF) { + fScanner.unread(); + } + } + } + + default: + if (!fEmulate && fLast == CARRIAGE_RETURN) { + switch (fState) { + case SINGLE_LINE_COMMENT: + // case CHARACTER: + // case STRING_DQ: + // case STRING_SQ: + int last; + int newState; + switch (ch) { + case '/': + last = SLASH; + newState = PHP; + break; + + case '*': + last = STAR; + newState = PHP; + break; + + case '\'': + last = NONE; + newState = STRING_SQ; + break; + + case '"': + last = NONE; + newState = STRING_DQ; + break; + + case '\r': + last = CARRIAGE_RETURN; + newState = PHP; + break; + + case '\\': + last = BACKSLASH; + newState = PHP; + break; + + default: + last = NONE; + newState = PHP; + break; + } + + fLast = NONE; // ignore fLast + return preFix(fState, newState, last, 1); + + default: + break; + } + } + } + + // states + switch (fState) { + case PHP: + switch (ch) { + case '#': + if (fTokenLength > 0) { + return preFix(PHP, SINGLE_LINE_COMMENT, NONE, 1); + } else { + preFix(PHP, SINGLE_LINE_COMMENT, NONE, 1); + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + break; + } + case '/': + if (fLast == SLASH) { + if (fTokenLength - getLastLength(fLast) > 0) { + return preFix(PHP, SINGLE_LINE_COMMENT, NONE, 2); + } else { + preFix(PHP, SINGLE_LINE_COMMENT, NONE, 2); + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + break; + } + + } else { + fTokenLength++; + fLast = SLASH; + break; + } + + case '*': + if (fLast == SLASH) { + if (fTokenLength - getLastLength(fLast) > 0) + return preFix(PHP, MULTI_LINE_COMMENT, SLASH_STAR, + 2); + else { + preFix(PHP, MULTI_LINE_COMMENT, SLASH_STAR, 2); + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + break; + } + + } else { + consume(); + break; + } + + case '\'': + fLast = NONE; // ignore fLast + if (fTokenLength > 0) + return preFix(PHP, STRING_SQ, NONE, 1); + else { + preFix(PHP, STRING_SQ, NONE, 1); + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + break; + } + + case '"': + fLast = NONE; // ignore fLast + if (fTokenLength > 0) + return preFix(PHP, STRING_DQ, NONE, 1); + else { + preFix(PHP, STRING_DQ, NONE, 1); + fTokenOffset += fTokenLength; + fTokenLength = fPrefixLength; + break; + } + + default: + consume(); + break; + } + break; + + case SINGLE_LINE_COMMENT: + consume(); + break; + + case PHPDOC: + switch (ch) { + case '/': + switch (fLast) { + case SLASH_STAR_STAR: + return postFix(MULTI_LINE_COMMENT); + + case STAR: + return postFix(PHPDOC); + + default: + consume(); + break; + } + break; + + case '*': + fTokenLength++; + fLast = STAR; + break; + + default: + consume(); + break; + } + break; + + case MULTI_LINE_COMMENT: + switch (ch) { + case '*': + if (fLast == SLASH_STAR) { + fLast = SLASH_STAR_STAR; + fTokenLength++; + fState = PHPDOC; + } else { + fTokenLength++; + fLast = STAR; + } + break; + + case '/': + if (fLast == STAR) { + return postFix(MULTI_LINE_COMMENT); + } else { + consume(); + break; + } + + default: + consume(); + break; + } + break; + + case STRING_DQ: + switch (ch) { + case '\\': + fLast = (fLast == BACKSLASH) ? NONE : BACKSLASH; + fTokenLength++; + break; + + case '\"': + if (fLast != BACKSLASH) { + return postFix(STRING_DQ); + + } else { + consume(); + break; + } + + default: + consume(); + break; + } + break; + case STRING_SQ: + switch (ch) { + case '\\': + fLast = (fLast == BACKSLASH) ? NONE : BACKSLASH; + fTokenLength++; + break; + + case '\'': + if (fLast != BACKSLASH) { + return postFix(STRING_SQ); + + } else { + consume(); + break; + } + + default: + consume(); + break; + } + break; + // case CHARACTER: + // switch (ch) { + // case '\\': + // fLast= (fLast == BACKSLASH) ? NONE : BACKSLASH; + // fTokenLength++; + // break; + // + // case '\'': + // if (fLast != BACKSLASH) { + // return postFix(CHARACTER); + // + // } else { + // consume(); + // break; + // } + // + // default: + // consume(); + // break; + // } + // break; + } + } + } + + private static final int getLastLength(int last) { + switch (last) { + default: + return -1; + + case NONE: + return 0; + + case CARRIAGE_RETURN: + case BACKSLASH: + case SLASH: + case STAR: + return 1; + + case SLASH_STAR: + return 2; + + case SLASH_STAR_STAR: + return 3; + } + } + + private final void consume() { + fTokenLength++; + fLast = NONE; + } + + private final IToken postFix(int state) { + fTokenLength++; + fLast = NONE; + fState = PHP; + fPrefixLength = 0; + return fTokens[state]; + } + + private final IToken preFix(int state, int newState, int last, + int prefixLength) { + // emulate JavaPartitionScanner + if (fEmulate && state == PHP + && (fTokenLength - getLastLength(fLast) > 0)) { + fTokenLength -= getLastLength(fLast); + fJavaOffset = fTokenOffset; + fJavaLength = fTokenLength; + fTokenLength = 1; + fState = newState; + fPrefixLength = prefixLength; + fLast = last; + return fTokens[state]; + + } else { + fTokenLength -= getLastLength(fLast); + fLast = last; + fPrefixLength = prefixLength; + IToken token = fTokens[state]; + fState = newState; + return token; + } + } + + private static int getState(String contentType) { + + if (contentType == null) + return PHP; + + else if (contentType.equals(PHP_SINGLELINE_COMMENT)) + return SINGLE_LINE_COMMENT; + + else if (contentType.equals(PHP_MULTILINE_COMMENT)) + return MULTI_LINE_COMMENT; + + else if (contentType.equals(PHP_PHPDOC_COMMENT)) + return PHPDOC; + + else if (contentType.equals(PHP_STRING_DQ)) + return STRING_DQ; + + else if (contentType.equals(PHP_STRING_SQ)) + return STRING_SQ; + + else if (contentType.equals(PHP_STRING_HEREDOC)) + return STRING_HEREDOC; + + // else if (contentType.equals(JAVA_CHARACTER)) + // return CHARACTER; + + else + return PHP; + } + + /* + * @see IPartitionTokenScanner#setPartialRange(IDocument, int, int, String, + * int) + */ + public void setPartialRange(IDocument document, int offset, int length, + String contentType, int partitionOffset) { + fScanner.setRange(document, offset, length); + setRange(document, offset, length); + fTokenOffset = partitionOffset; + fTokenLength = 0; + fPrefixLength = offset - partitionOffset; + fLast = NONE; + + if (offset == partitionOffset) { + // restart at beginning of partition + fState = PHP; + } else { + fState = getState(contentType); + } + + // emulate JavaPartitionScanner + if (fEmulate) { + fJavaOffset = -1; + fJavaLength = 0; + } + } + + /* + * @see ITokenScanner#setRange(IDocument, int, int) + */ + public void setRange(IDocument document, int offset, int length) { + fScanner.setRange(document, offset, length); + fTokenOffset = offset; + fTokenLength = 0; + fPrefixLength = 0; + fLast = NONE; + fState = PHP; + + // emulate JavaPartitionScanner + if (fEmulate) { + fJavaOffset = -1; + fJavaLength = 0; + } + } + + /* + * @see ITokenScanner#getTokenLength() + */ + public int getTokenLength() { + return fTokenLength; + } + + /* + * @see ITokenScanner#getTokenOffset() + */ + public int getTokenOffset() { + if (AbstractPartitioner.DEBUG) { + Assert.isTrue(fTokenOffset >= 0, Integer.toString(fTokenOffset)); + } + return fTokenOffset; + } + +} \ No newline at end of file