package net.sourceforge.pain.tools.guitool.action;

import net.sourceforge.pain.tools.guitool.*;

import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import java.io.*;
import java.util.*;

public class HtmlComponentRegistry {
    private HtmlComponentRegistry() {
    }

    private static final HashMap componentByClass = new HashMap();
    private static StyleSheet commonStyleSheet = null;

    public static synchronized JEditorPane get(Class clazz) throws IOException, BadLocationException {
        JEditorPane instance = (JEditorPane) componentByClass.get(clazz);
        if (instance == null) {
            String text = GuiTool.readTextFile(clazz, "/" + clazz.getName().replace('.', '/') + ".html");
            instance = new JEditorPane();
            instance.setContentType("text/html");
            instance.setEditable(false);
            StyleSheet styles = getCommonStyleSheet();
            HTMLEditorKit kit = new HTMLEditorKit();
            kit.setStyleSheet(styles);
            Document doc = kit.createDefaultDocument();
            kit.read(new StringReader(text), doc, 0);
            instance.setDocument(doc);
        }
        return instance;
    }

    private static StyleSheet getCommonStyleSheet() throws IOException {
        if (commonStyleSheet == null) {
            commonStyleSheet = new StyleSheet();
            commonStyleSheet.loadRules(new StringReader(GuiTool.readTextFile(null, "pain.css")), null);
        }
        return commonStyleSheet;
    }
}