InternalHTMLRenderer.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * JXClient is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.gui.label;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.Stack;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.html.HTML.Tag;
import javax.swing.text.html.HTMLEditorKit.ParserCallback;
import org.jetbrains.annotations.NotNull;

public class InternalHTMLRenderer extends ParserCallback {

    @NotNull
    private final Stack<Font> fonts = new Stack<>();

    @NotNull
    private final Stack<Color> colors = new Stack<>();

    @NotNull
    private final Graphics gc;

    private int x;

    private int y;

    private final int origX;

    private final int borderSize;

    public InternalHTMLRenderer(@NotNull final Font font, @NotNull final Color color, @NotNull final Graphics gc, final int x, final int y, final int borderSize) {
        fonts.push(font);
        colors.push(color);
        this.gc = gc;
        this.x = x;
        this.y = y;
        origX = x;
        this.borderSize = borderSize;
    }

    @Override
    public void handleText(@NotNull final char[] data, final int pos) {
        gc.setFont(fonts.peek());
        gc.setColor(colors.peek());
        final FontMetrics m = gc.getFontMetrics();
        final String str = new String(data);
        final int w = m.stringWidth(str);
        gc.drawString(str, x+borderSize, y+borderSize);
        x += w;
    }

    @Override
    public void handleStartTag(@NotNull final Tag t, @NotNull final MutableAttributeSet a, final int pos) {
        if (t.equals(Tag.A)) {
            fonts.push(fonts.peek());
            colors.push(Color.YELLOW);
            //y += defaultFont.getSize()+1;
        } else if (t.equals(Tag.B)) {
            fonts.push(fonts.peek().deriveFont(Font.BOLD));
            colors.push(colors.peek());
        } else if (t.equals(Tag.I)) {
            fonts.push(fonts.peek().deriveFont(Font.ITALIC));
            colors.push(colors.peek());
        } else if (t.equals(Tag.LI)) {
            fonts.push(fonts.peek());
            colors.push(colors.peek());
            gc.setFont(fonts.peek());
            gc.setColor(colors.peek());
            final FontMetrics m = gc.getFontMetrics();
            x = origX;
            y += fonts.peek().getSize()+1;
            final String str = " - ";
            final int w = m.stringWidth(str);
            gc.drawString(str, x+borderSize, y+borderSize);
            x += w;
        } else {
            fonts.push(fonts.peek());
            colors.push(colors.peek());
        }
    }

    @Override
    public void handleSimpleTag(@NotNull final Tag t, @NotNull final MutableAttributeSet a, final int pos) {
        if (t.equals(Tag.BR)) {
            y += fonts.peek().getSize()+1;
            x = origX;
        }
    }

    @Override
    public void handleEndTag(@NotNull final Tag t, final int pos) {
        fonts.pop();
        colors.pop();
    }

}