RFR: JDK-8314731 : Adds support for the alt attribute in the image type imput HTML tag.

Tue Aug 22 16:43:17 UTC 2023

According [HTML 3.2 specification](https://www.w3.org/TR/2018/SPSD-html32-20180315/#input)

`alt` is not an attribute of the `imput` element.

According [HTML 4.01 specifications](https://www.w3.org/TR/html4/interact/forms.html#h-17.4) : 

> ... For accessibility reasons, authors should provide [alternate text](https://www.w3.org/TR/html4/struct/objects.html#alternate-text) for the image via the [alt](https://www.w3.org/TR/html4/struct/objects.html#adef-alt) attribute. ...

This feature in not implemented in `FormView.java`.

⚠️  ~~This also affects the HTML 32 DTD~~

![Screenshot_20230817_025316](https://github.com/openjdk/jdk/assets/19194678/8e580574-d842-4a65-884b-26e33cd12138)

Left before the patch and right after the patch.

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.text.Document;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;

public class HTMLAddsSupportAltInputTag {
  public static void main(String[] args) {
    new HTMLAddsSupportAltInputTag();
  }

  public HTMLAddsSupportAltInputTag() {
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        JEditorPane jEditorPane = new JEditorPane();
        jEditorPane.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(jEditorPane);
        HTMLEditorKit kit = new HTMLEditorKit();
        jEditorPane.setEditorKit(kit);
        StyleSheet styleSheet = kit.getStyleSheet();
        styleSheet.addRule("""
            body {
                color: #000;
                font-family:times;
                margin: 4px;
            }
            """);
        String htmlString = """
            <html>
                <body>
                    <input type=image name=point src="file:oracle_logo_50x50.jpg" alt="Logo Oracle JPG">
                    <p>
                    <input type=image name=point src="file:none_oracle_logo_50x50.jpg" alt="Logo Oracle JPG">
                    <p>
                    <input type=image name=point src="files:none_oracle_logo_50x50.jpg">
                </body>
            </html>
            """;
        Document doc = kit.createDefaultDocument();
        jEditorPane.setDocument(doc);
        jEditorPane.setText(htmlString);
        JFrame jf = new JFrame("CSS named colors Test");
        jf.getContentPane().add(scrollPane, BorderLayout.CENTER);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setSize(new Dimension(400,200));
        jf.setLocationRelativeTo(null);
        jf.setVisible(true);
      }
    });
  }
}

The image to use with de code above, save it with the name  : `oracle_logo_50x50.jpg`
![oracle_logo_50x50.jpg](https://github.com/scientificware/jdk/assets/19194678/66eac51a-00a4-42f5-b330-e1d41af37988)

Designed from : [ScientificWare : Adds support for the alt attribute in the image type imput HTML tag](https://github.com/scientificware/jdk/issues/26)

-------------

Commit messages:
 - FormView.java : Adds missing space in a while statement. Updates Copyright year.
 - Merge master
 - FormView.java : Adds support for the alt attribute in the image type imput tag.

Changes: https://git.openjdk.org/jdk/pull/15319/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15319&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314731
  Stats: 7 lines in 1 file changed: 2 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/15319.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15319/head:pull/15319

PR: https://git.openjdk.org/jdk/pull/15319