/*
 * Java-Gnome Bindings Library
 *
 * Copyright 1998-2005 the Java-Gnome Team, all rights reserved.
 *
 * The Java-Gnome bindings library is free software distributed under
 * the terms of the GNU Library General Public License version 2.
 */
package org.freedesktop.cairo;

import java.io.File;
import java.io.IOException;

import org.gnu.glib.Handle;

/**
 */
public class PDFSurface extends Surface {

    public PDFSurface(String filename, double widthInches, double heightInches)
            throws IOException {
        super(initialize(filename, widthInches, heightInches));
    }

    public void setDPI(double xDPI, double yDPI) {
        cairo_pdf_surface_set_dpi(getHandle(), xDPI, yDPI);
    }

    private static Handle initialize(String filename, double widthInches,
            double heightInches) throws IOException {
        File f = new File(filename);

        if (f.isDirectory())
            throw new IOException(filename + " is a directory");

        if (f.exists()) {
            if (!f.canWrite())
                throw new IOException("cannot write to file: " + filename);
        } else {
            String parent = f.getParent();
            if (null == parent)
                parent = System.getProperty("user.dir");

            File dir = new File(parent);
            if (!dir.exists()) {
                throw new IOException("destination directory doesn't exist: "
                        + filename);
            }
            if (!dir.canWrite())
                throw new IOException("Cannot write to file: " + filename);
        }
        return cairo_pdf_surface_create(filename, widthInches, heightInches);
    }

    /*
     * Native calls
     */
    native static final private Handle cairo_pdf_surface_create(
            String filename, double width_inches, double height_inches);

    native static final private void cairo_pdf_surface_set_dpi(Handle handle,
            double x, double y);
}