| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.parser; |
| |
| import java.io.IOException; |
| |
| /** |
| * This class implements an event-based parser for the SVG preserveAspectRatio |
| * attribute values. |
| * |
| * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a> |
| * @version $Id$ |
| */ |
| public class PreserveAspectRatioParser extends AbstractParser { |
| |
| /** |
| * The PreserveAspectRatio handler used to report parse events. |
| */ |
| protected PreserveAspectRatioHandler preserveAspectRatioHandler; |
| |
| /** |
| * Creates a new PreserveAspectRatioParser. |
| */ |
| public PreserveAspectRatioParser() { |
| preserveAspectRatioHandler = |
| DefaultPreserveAspectRatioHandler.INSTANCE; |
| } |
| |
| /** |
| * Allows an application to register a PreserveAspectRatioParser handler. |
| * |
| * <p>If the application does not register a handler, all |
| * events reported by the parser will be silently ignored. |
| * |
| * <p>Applications may register a new or different handler in the |
| * middle of a parse, and the parser must begin using the new |
| * handler immediately.</p> |
| * @param handler The transform list handler. |
| */ |
| public void |
| setPreserveAspectRatioHandler(PreserveAspectRatioHandler handler) { |
| preserveAspectRatioHandler = handler; |
| } |
| |
| /** |
| * Returns the length handler in use. |
| */ |
| public PreserveAspectRatioHandler getPreserveAspectRatioHandler() { |
| return preserveAspectRatioHandler; |
| } |
| |
| /** |
| * Parses the current stream. |
| */ |
| protected void doParse() throws ParseException, IOException { |
| current = reader.read(); |
| skipSpaces(); |
| |
| parsePreserveAspectRatio(); |
| } |
| |
| /** |
| * Parses a PreserveAspectRatio attribute. |
| */ |
| protected void parsePreserveAspectRatio() |
| throws ParseException, IOException { |
| preserveAspectRatioHandler.startPreserveAspectRatio(); |
| |
| align: switch (current) { |
| case 'n': |
| current = reader.read(); |
| if (current != 'o') { |
| reportCharacterExpectedError( 'o',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'n') { |
| reportCharacterExpectedError( 'o',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'e') { |
| reportCharacterExpectedError( 'e',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| skipSpaces(); |
| preserveAspectRatioHandler.none(); |
| break; |
| |
| case 'x': |
| current = reader.read(); |
| if (current != 'M') { |
| reportCharacterExpectedError( 'M',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| switch (current) { |
| case 'a': |
| current = reader.read(); |
| if (current != 'x') { |
| reportCharacterExpectedError( 'x',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'Y') { |
| reportCharacterExpectedError( 'Y',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'M') { |
| reportCharacterExpectedError( 'M',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| switch (current) { |
| case 'a': |
| current = reader.read(); |
| if (current != 'x') { |
| reportCharacterExpectedError( 'x',current ); |
| skipIdentifier(); |
| break align; |
| } |
| preserveAspectRatioHandler.xMaxYMax(); |
| current = reader.read(); |
| break; |
| case 'i': |
| current = reader.read(); |
| switch (current) { |
| case 'd': |
| preserveAspectRatioHandler.xMaxYMid(); |
| current = reader.read(); |
| break; |
| case 'n': |
| preserveAspectRatioHandler.xMaxYMin(); |
| current = reader.read(); |
| break; |
| default: |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| break align; |
| } |
| } |
| break; |
| case 'i': |
| current = reader.read(); |
| switch (current) { |
| case 'd': |
| current = reader.read(); |
| if (current != 'Y') { |
| reportCharacterExpectedError( 'Y',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'M') { |
| reportCharacterExpectedError( 'M',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| switch (current) { |
| case 'a': |
| current = reader.read(); |
| if (current != 'x') { |
| reportCharacterExpectedError( 'x',current ); |
| skipIdentifier(); |
| break align; |
| } |
| preserveAspectRatioHandler.xMidYMax(); |
| current = reader.read(); |
| break; |
| case 'i': |
| current = reader.read(); |
| switch (current) { |
| case 'd': |
| preserveAspectRatioHandler.xMidYMid(); |
| current = reader.read(); |
| break; |
| case 'n': |
| preserveAspectRatioHandler.xMidYMin(); |
| current = reader.read(); |
| break; |
| default: |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| break align; |
| } |
| } |
| break; |
| case 'n': |
| current = reader.read(); |
| if (current != 'Y') { |
| reportCharacterExpectedError( 'Y',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| if (current != 'M') { |
| reportCharacterExpectedError( 'M',current ); |
| skipIdentifier(); |
| break align; |
| } |
| current = reader.read(); |
| switch (current) { |
| case 'a': |
| current = reader.read(); |
| if (current != 'x') { |
| reportCharacterExpectedError( 'x',current ); |
| skipIdentifier(); |
| break align; |
| } |
| preserveAspectRatioHandler.xMinYMax(); |
| current = reader.read(); |
| break; |
| case 'i': |
| current = reader.read(); |
| switch (current) { |
| case 'd': |
| preserveAspectRatioHandler.xMinYMid(); |
| current = reader.read(); |
| break; |
| case 'n': |
| preserveAspectRatioHandler.xMinYMin(); |
| current = reader.read(); |
| break; |
| default: |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| break align; |
| } |
| } |
| break; |
| default: |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| break align; |
| } |
| break; |
| default: |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| } |
| break; |
| default: |
| if (current != -1) { |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| } |
| } |
| |
| skipCommaSpaces(); |
| |
| switch (current) { |
| case 'm': |
| current = reader.read(); |
| if (current != 'e') { |
| reportCharacterExpectedError( 'e',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| if (current != 'e') { |
| reportCharacterExpectedError( 'e',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| if (current != 't') { |
| reportCharacterExpectedError( 't',current ); |
| skipIdentifier(); |
| break; |
| } |
| preserveAspectRatioHandler.meet(); |
| current = reader.read(); |
| break; |
| case 's': |
| current = reader.read(); |
| if (current != 'l') { |
| reportCharacterExpectedError( 'l',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| if (current != 'i') { |
| reportCharacterExpectedError( 'i',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| if (current != 'c') { |
| reportCharacterExpectedError( 'c',current ); |
| skipIdentifier(); |
| break; |
| } |
| current = reader.read(); |
| if (current != 'e') { |
| reportCharacterExpectedError( 'e',current ); |
| skipIdentifier(); |
| break; |
| } |
| preserveAspectRatioHandler.slice(); |
| current = reader.read(); |
| break; |
| default: |
| if (current != -1) { |
| reportUnexpectedCharacterError( current ); |
| skipIdentifier(); |
| } |
| } |
| |
| skipSpaces(); |
| if (current != -1) { |
| reportError("end.of.stream.expected", |
| new Object[] { new Integer(current) }); |
| } |
| |
| preserveAspectRatioHandler.endPreserveAspectRatio(); |
| } |
| |
| /** |
| * Skips characters in the given reader until a white space is encountered. |
| */ |
| protected void skipIdentifier() throws IOException { |
| loop: for (;;) { |
| current = reader.read(); |
| switch(current) { |
| case 0xD: case 0xA: case 0x20: case 0x9: |
| current = reader.read(); |
| break loop; |
| default: |
| if (current == -1) { |
| break loop; |
| } |
| } |
| } |
| } |
| } |