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/* GdkGraphics.java

   Copyright (C) 1998, 1999, 2002, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath 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, or (at your option)

any later version.

GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.java.awt.peer.gtk;

import gnu.classpath.Configuration;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Rectangle;

import java.awt.Shape;

import java.awt.SystemColor;

import java.awt.image.ImageObserver;

import java.text.AttributedCharacterIterator;

public class GdkGraphics extends Graphics

{

  static

  {

    if (Configuration.INIT_LOAD_LIBRARY)

      {

        System.loadLibrary("gtkpeer");

      }

    initStaticState ();

  }

  static native void initStaticState();

  private final int native_state = GtkGenericPeer.getUniqueInteger ();

  Color color, xorColor;

  GtkComponentPeer component;

  Font font = new Font ("Dialog", Font.PLAIN, 12);

  Rectangle clip;

  GtkImage image;

  int xOffset = 0;

  int yOffset = 0;

  static final int GDK_COPY = 0, GDK_XOR = 2;

  native void initState (GtkComponentPeer component);

  native void initStateUnlocked (GtkComponentPeer component);

  native void initState (int width, int height);

  native void initFromImage (GtkImage image);

  native void copyState (GdkGraphics g);

  GdkGraphics (GdkGraphics g)

  {

    color = g.color;

    xorColor = g.xorColor;

    font = g.font;

    if (font == null)

      font = new Font ("Dialog", Font.PLAIN, 12);

    clip = new Rectangle (g.clip);

    component = g.component;

    copyState (g);

  }

  GdkGraphics (int width, int height)

  {

    initState (width, height);

    color = Color.black;

    clip = new Rectangle (0, 0, width, height);

    font = new Font ("Dialog", Font.PLAIN, 12);

  }

  GdkGraphics (GtkImage image)

  {

    this.image = image;

    initFromImage (image);

    color = Color.black;

    clip = new Rectangle (0, 0,

                          image.getWidth(null), image.getHeight(null));

    font = new Font ("Dialog", Font.PLAIN, 12);

  }

  GdkGraphics (GtkComponentPeer component)

  {

    this.component = component;

    color = Color.black;

    if (component.isRealized ())

      initComponentGraphics ();

    else

      connectSignals (component);

  }

  void initComponentGraphics ()

  {

    initState (component);

    color = component.awtComponent.getForeground ();

    if (color == null)

      color = Color.BLACK;

    Dimension d = component.awtComponent.getSize ();

    clip = new Rectangle (0, 0, d.width, d.height);

  }

  // called back by native side: realize_cb

  void initComponentGraphicsUnlocked ()

  {

    initStateUnlocked (component);

    color = component.awtComponent.getForeground ();

    if (color == null)

      color = Color.BLACK;

    Dimension d = component.awtComponent.getSize ();

    clip = new Rectangle (0, 0, d.width, d.height);

  }

  native void connectSignals (GtkComponentPeer component);

  public native void clearRect(int x, int y, int width, int height);

  public void clipRect (int x, int y, int width, int height)

  {

    if (component != null && ! component.isRealized ())

      return;

    clip = clip.intersection (new Rectangle (x, y, width, height));

    setClipRectangle (clip.x, clip.y, clip.width, clip.height);

  }

  public native void copyArea(int x, int y, int width, int height,

                              int dx, int dy);

  public Graphics create ()

  {

    return new GdkGraphics (this);

  }

  public native void dispose();

  public boolean drawImage (Image img, int x, int y,

                            Color bgcolor, ImageObserver observer)

  {

    return drawImage(img, x, y, img.getWidth(null), img.getHeight(null),

                     bgcolor, observer);

  }

  public boolean drawImage (Image img, int x, int y, ImageObserver observer)

  {

    return drawImage (img, x, y, null, observer);

  }

  public boolean drawImage (Image img, int x, int y, int width, int height,

                            Color bgcolor, ImageObserver observer)

  {

    if (img instanceof GtkImage)

      return ((GtkImage)img).drawImage (this, x, y, width, height,

                                        bgcolor, observer);

    else

      return (new GtkImage(img.getSource())).drawImage (this, x, y,

                                                        width, height,

                                                        bgcolor, observer);

  }

  public boolean drawImage (Image img, int x, int y, int width, int height,

                            ImageObserver observer)

  {

    return drawImage (img, x, y, width, height,  null, observer);

  }

  public boolean drawImage (Image img, int dx1, int dy1, int dx2, int dy2,

                            int sx1, int sy1, int sx2, int sy2,

                            Color bgcolor, ImageObserver observer)

  {

    if (img instanceof GtkImage)

      return ((GtkImage)img).drawImage(this, dx1, dy1, dx2, dy2,

                                       sx1, sy1, sx2, sy2, bgcolor, observer);

    else

      return (new GtkImage(img.getSource())).drawImage(this, dx1, dy1,

                                                       dx2, dy2,

                                                       sx1, sy1, sx2, sy2,

                                                       bgcolor, observer);

  }

  public boolean drawImage (Image img, int dx1, int dy1, int dx2, int dy2,

                            int sx1, int sy1, int sx2, int sy2,

                            ImageObserver observer)

  {

    return drawImage (img, dx1, dy1, dx2, dy2,

                      sx1, sy1, sx2, sy2,

                      null, observer);

  }

  public native void drawLine(int x1, int y1, int x2, int y2);

  public native void drawArc(int x, int y, int width, int height,

                             int startAngle, int arcAngle);

  public native void fillArc(int x, int y, int width, int height,

                             int startAngle, int arcAngle);

  public native void drawOval(int x, int y, int width, int height);

  public native void fillOval(int x, int y, int width, int height);

  public native void drawPolygon(int[] xPoints, int[] yPoints, int nPoints);

  public native void fillPolygon(int[] xPoints, int[] yPoints, int nPoints);

  public native void drawPolyline(int[] xPoints, int[] yPoints, int nPoints);

  public native void drawRect(int x, int y, int width, int height);

  public native void fillRect(int x, int y, int width, int height);

  GdkFontPeer getFontPeer()

  {

    return (GdkFontPeer) getFont().getPeer();

  }

  native void drawString (GdkFontPeer f, String str, int x, int y);

  public void drawString (String str, int x, int y)

  {

    drawString(getFontPeer(), str, x, y);

  }

  public void drawString (AttributedCharacterIterator ci, int x, int y)

  {

    throw new Error ("not implemented");

  }

  public void drawRoundRect(int x, int y, int width, int height,

                            int arcWidth, int arcHeight)

  {

    if (arcWidth > width)

      arcWidth = width;

    if (arcHeight > height)

      arcHeight = height;

    int xx = x + width - arcWidth;

    int yy = y + height - arcHeight;

    drawArc (x, y, arcWidth, arcHeight, 90, 90);

    drawArc (xx, y, arcWidth, arcHeight, 0, 90);

    drawArc (xx, yy, arcWidth, arcHeight, 270, 90);

    drawArc (x, yy, arcWidth, arcHeight, 180, 90);

    int y1 = y + arcHeight / 2;

    int y2 = y + height - arcHeight / 2;

    drawLine (x, y1, x, y2);

    drawLine (x + width, y1, x + width, y2);

    int x1 = x + arcWidth / 2;

    int x2 = x + width - arcWidth / 2;

    drawLine (x1, y, x2, y);

    drawLine (x1, y + height, x2, y + height);

  }

  public void fillRoundRect (int x, int y, int width, int height,

                             int arcWidth, int arcHeight)

  {

    if (arcWidth > width)

      arcWidth = width;

    if (arcHeight > height)

      arcHeight = height;

    int xx = x + width - arcWidth;

    int yy = y + height - arcHeight;

    fillArc (x, y, arcWidth, arcHeight, 90, 90);

    fillArc (xx, y, arcWidth, arcHeight, 0, 90);

    fillArc (xx, yy, arcWidth, arcHeight, 270, 90);

    fillArc (x, yy, arcWidth, arcHeight, 180, 90);

    fillRect (x, y + arcHeight / 2, width, height - arcHeight + 1);

    fillRect (x + arcWidth / 2, y, width - arcWidth + 1, height);

  }

  public Shape getClip ()

  {

    return getClipBounds ();

  }

  public Rectangle getClipBounds ()

  {

    if (clip == null)

      return null;

    else

      return clip.getBounds();

  }

  public Color getColor ()

  {

    return color;

  }

  public Font getFont ()

  {

    return font;

  }

  public FontMetrics getFontMetrics (Font font)

  {

    return new GdkFontMetrics (font);

  }

  native void setClipRectangle (int x, int y, int width, int height);

  public void setClip (int x, int y, int width, int height)

  {

    if ((component != null && ! component.isRealized ())

        || clip == null)

      return;

    clip.x = x;

    clip.y = y;

    clip.width = width;

    clip.height = height;

    setClipRectangle (x, y, width, height);

  }

  public void setClip (Rectangle clip)

  {

    setClip (clip.x, clip.y, clip.width, clip.height);

  }

  public void setClip (Shape clip)

  {

    if (clip == null)

      {

        // Reset clipping.

        Dimension d = component.awtComponent.getSize();

        setClip(new Rectangle (0, 0, d.width, d.height));

      }

    else

      setClip(clip.getBounds());

  }

  private native void setFGColor(int red, int green, int blue);

  public void setColor (Color c)

  {

    if (c == null)

      color = Color.BLACK;

    else

      color = c;

    if (xorColor == null) /* paint mode */

      setFGColor (color.getRed (), color.getGreen (), color.getBlue ());

    else                  /* xor mode */

      setFGColor (color.getRed   () ^ xorColor.getRed (),

                  color.getGreen () ^ xorColor.getGreen (),

                  color.getBlue  () ^ xorColor.getBlue ());

  }

  public void setFont (Font font)

  {

    if (font != null)

      this.font = font;

  }

  native void setFunction (int gdk_func);

  public void setPaintMode ()

  {

    xorColor = null;

    setFunction (GDK_COPY);

    setFGColor (color.getRed (), color.getGreen (), color.getBlue ());

  }

  public void setXORMode (Color c)

  {

    xorColor = c;

    setFunction (GDK_XOR);

    setFGColor (color.getRed   () ^ xorColor.getRed (),

                color.getGreen () ^ xorColor.getGreen (),

                color.getBlue  () ^ xorColor.getBlue ());

  }

  public native void translateNative(int x, int y);

  public void translate (int x, int y)

  {

    if (component != null && ! component.isRealized ())

      return;

    clip.x -= x;

    clip.y -= y;

    translateNative (x, y);

  }

}