Bidi text JTextPane and JTextArea changes the row height

You can use the following example to demonstrate the problem. When you run, copy and paste an Arab character of http://www.alanwood.net/unicode/arabic.html in the display area. This creates a condition of bidi in the document. The circumflex replaces one with a flag at the top to indicate ownership LTR or RTL of the character. The height of the display line, going at a lower height. I am able to detect the State of bidi. I can't get any action to indicate what was the change of line height. I've exhausted all measuring height of possible line that I could find. The size reported by all methods does not State non-bidi bidi State, even if the row height is significantly reduced. Anyone else encounter this? Any proven way to measure the difference?

to import javax.swing.JFrame;
Import javax.swing.JTextPane;

public class HelloSwing {}

Public Shared Sub main (String [] args) {}
JFrame frame = new JFrame ("HelloWorldSwing");
OSname string = new String();
OSname = System.getProperty ("os.name");
JTextPane tp = new JTextPane();
frame.getContentPane () .add (tp);
tp.setText (OSname);
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
Frame.Pack ();
frame.setSize (400, 200);
frame.setLocationByPlatform (true);
frame.setVisible (true);
}
}

I think that Eclipse does not use JEditorPane but own component. GUI editors has monospaced fonts of equal width/height for each tank and fixed a height for all rows. It is much easier to manage several sizes of fonts on the same line.

Tags: Java

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