我正在使用 JEditorPane 来显示样式文本,并且我还使用<pre>
标签来保留文本中的所有空格。问题是我想让 JEditorPane 包装文本行,但 HTMLEditorKit(或相关类)不会将文本包装在<pre>
标签内。
我的意思是我想要一个与样式表“空白:预包装”类似的行为,HTMLEditorKit 似乎不支持它。
你知道一种强制 HTMLEditorKit 将文本包装在里面的方法<pre>
,也许可以扩展它。
我做了一个例子来展示我正在尝试做的事情。
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
import javax.swing.text.*;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLEditorKit;
public class PreWrapApp extends javax.swing.JFrame {
public class PreWrapHTMLEditorKit extends HTMLEditorKit {
ViewFactory viewFactory = new HTMLFactory() {
@Override
public View create(Element elem) {
AttributeSet attrs = elem.getAttributes();
Object elementName = attrs.getAttribute(AbstractDocument.ElementNameAttribute);
Object o = (elementName != null) ? null : attrs.getAttribute(StyleConstants.NameAttribute);
if (o instanceof HTML.Tag) {
HTML.Tag kind = (HTML.Tag) o;
if (kind == HTML.Tag.PRE) {
//View view = new javax.swing.text.html.ParagraphView(elem); // Not wrapping
View view = new javax.swing.text.html.ParagraphView(elem.getElement(0)); // Don't show everything
return view;
}
}
return super.create(elem);
}
};
@Override
public ViewFactory getViewFactory() {
return this.viewFactory;
}
}
public PreWrapApp() {
JEditorPane editorPane = new JEditorPane();
JScrollPane scrollPane = new JScrollPane();
this.setPreferredSize(new Dimension(300, 300));
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new BorderLayout());
//editorPane.setContentType("text/html");
editorPane.setEditorKit(new PreWrapHTMLEditorKit());
editorPane.setText(""
+ "<html>"
+ "<head>"
+ "<style type=\"text/css\">"
+ "pre.c1 { white-space: normal;}" // It is not wrapping
+ "pre.c2 { white-space: pre-wrap;}" // It is not wrapping
+ "p.c3 { white-space: pre;}" // It is not preserving white-spaces
+ "</style>"
+ "</head>"
+ "<body>"
+ "<pre class=\"c1\">long text line long text line long text line long text line (new line here!) \nlong text line long text line long text line long text line</pre>"
+ "<pre class=\"c2\">long text line long text line long text line long text line (new line here!) \nlong text line long text line long text line long text line</pre>"
+ "<p class=\"c3\">long text line long text line long text line long text line (new line here!) \nlong text line long text line long text line long text line</p>"
+ "</body>"
+ "</html>");
scrollPane.setViewportView(editorPane);
getContentPane().add(scrollPane);
pack();
}
public static void main(String args[]) {
new PreWrapApp().setVisible(true);
}
}
谢谢你。