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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-4662) [classlib][swing][html] CSS is used to specify HTML tag behavior
Date Tue, 21 Aug 2007 16:43:33 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-4662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12521527
] 

Vasily Zakharov commented on HARMONY-4662:
------------------------------------------

This behavior of Harmony is similar to RI, but contradicts the HTML specification, so probably
it's better be fixed. The following links may be useful:
http://www.w3.org/TR/REC-CSS2/sample.html
http://www.w3.org/TR/html401/index/elements.html

Note: issues HARMONY-4605 and HARMONY-4606 affect the output of the provided test, but they're
separate problems not directly related to this one.


> [classlib][swing][html] CSS is used to specify HTML tag behavior
> ----------------------------------------------------------------
>
>                 Key: HARMONY-4662
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4662
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Vasily Zakharov
>         Attachments: Harmony.jpg, RI.jpg
>
>
> For now Harmony uses modules/swing/src/main/java/common/javax/swing/text/html/default.css
file to specify behavior for many HTML tags, like <center>, <b>, and some others.
Moreover, it seems that RI does the same for many tags. This is quite comfortable and efficient,
but is not quite compliant to HTML specification because default CSS may be replaced and tags
start to behave incompatibly to the specification.
> The following test shows how the tags operate by default and with default CSS replaced
with empty stylesheet:
> import java.awt.Container;
> import javax.swing.*;
> import javax.swing.border.*;
> import javax.swing.text.html.*;
> public class Test {
>     static final String testHTML =
>             "<h1>Heading 1</h1><h2>Heading 2</h2><h3>Heading
3</h3>"
>           + "<h4>Heading 4</h4><h5>Heading 5</h5><h6>Heading
6</h6>"
>           + "<p>paragraph</p><pre>  pre\n   pre</pre><center>center</center>"
>           + "<p><b>bold</b> <strong>strong</strong> <i>italic</i>
<em>em</em></p>"
>           + "<p><small>small</small> normal <big>big</big></p>"
>           + "<a>aaa</a> <a href=\"\">href</a> <code>code</code>
<tt>tt</tt>";
>     public static void main(String argv[]) {
>         try {
>             JFrame frame = new JFrame("Test");
>             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
>             Container pane = frame.getContentPane();
>             pane.setLayout(new BoxLayout(pane, BoxLayout.X_AXIS));
>             Border border = new BevelBorder(BevelBorder.LOWERED);
>             JEditorPane defaultPane = new JEditorPane("text/html", testHTML);
>             defaultPane.setBorder(new TitledBorder(border, "Default CSS",
>                     TitledBorder.LEFT, TitledBorder.ABOVE_TOP));
>             JEditorPane replacedPane = new JEditorPane("text/html", "");
>             replacedPane.setBorder(new TitledBorder(border, "Empty CSS",
>                     TitledBorder.LEFT, TitledBorder.ABOVE_TOP));
>             HTMLEditorKit editorKit = new HTMLEditorKit();
>             StyleSheet styleSheet = new StyleSheet();
>             editorKit.setStyleSheet(styleSheet);
>             replacedPane.setEditorKit(editorKit);
>             replacedPane.setText(testHTML);
>             pane.add(defaultPane);
>             pane.add(replacedPane);
>             frame.pack();
>             frame.setVisible(true);
>         } catch (Exception e) {
>             e.printStackTrace(System.out);
>         }
>     }
> }
> The attached screenshots demonstrate the behavior of RI and Harmony.
> As one may see, on both RI and Harmony only <b> and <i> tags operate normally
with empty stylesheet, and also <pre> tag retains part of its functionality (spaces
are not merged).

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