/*

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   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
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package org.apache.batik.parser;

import java.io.IOException;

This class implements an event-based parser for the SVG preserveAspectRatio attribute values.
Author:Stephane Hillion
Version:$Id: PreserveAspectRatioParser.java 1802297 2017-07-18 13:58:12Z ssteiner $
/** * 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: PreserveAspectRatioParser.java 1802297 2017-07-18 13:58:12Z ssteiner $ */
public class PreserveAspectRatioParser extends AbstractParser {
The PreserveAspectRatio handler used to report parse events.
/** * The PreserveAspectRatio handler used to report parse events. */
protected PreserveAspectRatioHandler preserveAspectRatioHandler;
Creates a new PreserveAspectRatioParser.
/** * Creates a new PreserveAspectRatioParser. */
public PreserveAspectRatioParser() { preserveAspectRatioHandler = DefaultPreserveAspectRatioHandler.INSTANCE; }
Allows an application to register a PreserveAspectRatioParser handler.

If the application does not register a handler, all events reported by the parser will be silently ignored.

Applications may register a new or different handler in the middle of a parse, and the parser must begin using the new handler immediately.

Params:
  • handler – The transform list handler.
/** * 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.
/** * Returns the length handler in use. */
public PreserveAspectRatioHandler getPreserveAspectRatioHandler() { return preserveAspectRatioHandler; }
Parses the current stream.
/** * Parses the current stream. */
protected void doParse() throws ParseException, IOException { current = reader.read(); skipSpaces(); parsePreserveAspectRatio(); }
Parses a PreserveAspectRatio attribute.
/** * 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[] {current}); } preserveAspectRatioHandler.endPreserveAspectRatio(); }
Skips characters in the given reader until a white space is encountered.
/** * 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; } } } } }