JTextPane, text/html content: nested HTML element do not inherit font size?

Question

I have this code to display HTML formatted string:

JTextPane pane = new JTextPane();
        pane.setContentType("text/html");
        pane.setEditable(false);
        pane.setText(
            "<html>" +
                "<body style='font-size:18px'>" +
                    "<h1>Error:</h1>" +
                    "<p>" +
                        "Could not read the file <code>none.txt</code>. " +
                        "Perhaps it does not exist in the specified location, " +
                        "or possibly there is no access to it" +
                    "</p>" +
                "</body>" +
            "</html>");
        add(pane);

But this is the output:

You can see that the none.txt string doesn't inherit the font size of its enclosing paragraph, although this is what's supposed to happen in HTML (see jsfiddle).

How do I fix this?

Perhaps end the body tag before the <code> tags, then restate the body tag afterwards? Example: "Could not read the file </body><code> none.txt</code><body> — joey942
– joey942, Commented Dec 14, 2016 at 13:46
@joey942, I don't see the sense in it. Why excluding <code>none.txt</code> from <body> should work, and how can we have more than one <body>? anyway, tried that, it completely ignores the whole content of <p>, and all I see is the "Error:" text. — Tar
– Tar, Commented Dec 14, 2016 at 13:56
Then perhaps do this: <div id="notbody"><code>none.txt</code></div> Then in CSS, #notbody{ // set font size to what you want it to be} These are just suggestions, I have not tried them out myself. — joey942
– joey942, Commented Dec 14, 2016 at 14:01
I may have found something for you, this may help: stackoverflow.com/questions/16201948/… It has information on the not selector. — joey942
– joey942, Commented Dec 14, 2016 at 14:08

VGR · Accepted Answer · 2016-12-14 15:20:45Z

3

Definitely a bug. You can work around it by adding explicit inheritance in the CSS, with a <style> element:

pane.setText(
    "<html>" +
        "<style>\ncode { font-size: inherit; }\n</style>" +
        "<body style='font-size:18px'>" +
            "<h1>Error:</h1>" +
            "<p>" +
                "Could not read the file <code>none.txt</code>. " +
                "Perhaps it does not exist in the specified location, " +
                "or possibly there is no access to it" +
            "</p>" +
        "</body>" +
    "</html>");

answered Dec 14, 2016 at 15:20

VGR

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2 Comments

Tar Over a year ago

That's annoying. Now I have to add inherit for every kind of block I may ever use? bold, code, etc... ?

VGR Over a year ago

I don’t think <b> needs it. Probably just the ones which change the font family. <code>, <pre>, <samp>, and possibly <kbd>.

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