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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4748) [classlib][swing][html] CSS parser displays errors
Date Wed, 05 Sep 2007 14:05:35 GMT
[classlib][swing][html] CSS parser displays errors
--------------------------------------------------

                 Key: HARMONY-4748
                 URL: https://issues.apache.org/jira/browse/HARMONY-4748
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Vasily Zakharov
            Priority: Minor


org.apache.harmony.x.swing.text.html.cssparser.CSSParser displays the following errors when
trying to open the http://www.apache.org/ page:

CSSParser: failed to parse '' at [1, 1] 
CSSParser: failed to parse '+' at [1, 20] 
CSSParser: failed to parse '' at [2, 188] 

Here's the reproducer:

import javax.swing.JFrame;
import javax.swing.JEditorPane;
public class Test {
    public static void main(String argv[]) {
        try {
            JFrame frame = new JFrame();
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            JEditorPane pane = new JEditorPane("http://www.apache.org/");
            frame.getContentPane().add(pane);
            frame.setSize(200, 300);
            frame.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace(System.out);
        }
    }
}

Investigation shows that the errors occur at the following point:

	at org.apache.harmony.x.swing.text.html.cssparser.CSSLogger.logError(CSSLogger.java:29)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.skipTillRuleSetEnd(CSSParser.java:30)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.skipTillExpressionEnd(CSSParser.java:546)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.styleSheetBody(CSSParser.java:134)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.styleSheet(CSSParser.java:75)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.cssGrammar(CSSParser.java:54)
	at org.apache.harmony.x.swing.text.html.cssparser.CSSParser.parse(CSSParser.java:11)
	at javax.swing.text.html.StyleSheet.parseSheet(StyleSheet.java:1156)
	at javax.swing.text.html.StyleSheet.loadRules(StyleSheet.java:995)
	at javax.swing.text.html.HTMLDocument$HTMLReader$LinkAction.loadCSS(HTMLDocument.java:535)
	at javax.swing.text.html.HTMLDocument$HTMLReader$LinkAction.start(HTMLDocument.java:524)
	at javax.swing.text.html.HTMLDocument$HTMLReader.handleSimpleTag(HTMLDocument.java:627)
	at javax.swing.text.html.parser.DocumentParser.handleEmptyTag(DocumentParser.java:70)
	at javax.swing.text.html.parser.Parser.startTag(Parser.java:431)
	at javax.swing.text.html.parser.Parser$ParserHandlerImpl.iHaveNewStartTag(Parser.java:592)
	at javax.swing.text.html.parser.CUP$ParserCup$actions.CUP$ParserCup$do_action(ParserCup.java:939)
	at javax.swing.text.html.parser.ParserCup.do_action(ParserCup.java:221)
	at java_cup.runtime.lr_parser.parse(lr_parser.java:569)
	at javax.swing.text.html.parser.Parser$ParserHandlerImpl.parse(Parser.java:59)
	at javax.swing.text.html.parser.Parser.parse(Parser.java:399)
	at javax.swing.text.html.parser.DocumentParser.parse(DocumentParser.java:98)
	at javax.swing.text.html.parser.ParserDelegator.parse(ParserDelegator.java:80)
	at javax.swing.text.html.HTMLEditorKit.read(HTMLEditorKit.java:736)
	at javax.swing.JEditorPane.documentLoading(JEditorPane.java:68)
	at javax.swing.JEditorPane.setPage(JEditorPane.java:697)
	at javax.swing.JEditorPane.setPage(JEditorPane.java:591)
	at javax.swing.JEditorPane.<init>(JEditorPane.java:298)
	at Test.main(Test.java:8)

Further investigation is complicated because of HARMONY-4660 that throws NPE when page is
parsed.


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