libjava/gnu/java/awt/peer/gtk/GdkClasspathFontPeer.java - gcc - Git at Google

 /* GdkClasspathFontPeer.java -- backend implementation for Font object
    Copyright (C) 2003 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., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 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 java.awt.*;
 import java.awt.font.*;
 import java.awt.geom.*;
 import java.io.InputStream;
 import java.io.IOException;
 import java.io.Serializable;
 import java.util.Locale;
 import java.util.Map;
 import java.util.StringTokenizer;
 import java.text.CharacterIterator;
 import java.text.AttributedCharacterIterator;
 import java.text.StringCharacterIterator;
 import java.awt.font.TextAttribute;
 import gnu.classpath.Configuration;
 import gnu.java.awt.peer.ClasspathFontPeer;

 /**
  * This class represents a windowing system font using the Pango
  * unicode/glyph/font library and the Cairo rendering library.
  *
  * @author Graydon Hoare (graydon@redhat.com)
  */

 public class GdkClasspathFontPeer extends ClasspathFontPeer
 {

   static
   {
     if (Configuration.INIT_LOAD_LIBRARY)
       {
         System.loadLibrary("gtkpeer");
       }
     initStaticState ();
   }
   native static void initStaticState ();
   private final int native_state = GtkGenericPeer.getUniqueInteger ();


   /* Instance Variables */

   private native void initState ();
   private native void dispose ();
   private native void setFont (String family, int style, int size);

   protected void sync ()
   {
     this.setFont (this.familyName, this.style, (int)this.size);
   }

   protected void finalize ()
   {
     dispose ();
   }

   /*
    * Helpers for the 3-way overloading that this class seems to suffer
    * from. Remove them if you feel like they're a performance bottleneck,
    * for the time being I prefer my code not be written and debugged in
    * triplicate.
    */

   private String buildString(CharacterIterator i) {
     String s = new String ();
     for(char c = i.first(); c != CharacterIterator.DONE; c = i.next())
       s += c;
     return s;
   }

   private String buildString(CharacterIterator iter, int begin, int limit) {
     String s = new String ();
     int i = 0;
     for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next(), i++)
       {
         if (begin <= i)
           s += c;
         if (limit <= i)
           break;
       }
     return s;
   }

   private String buildString(char[] chars, int begin, int limit) {
     String s = new String ();
     for(int i = begin; i <= limit; i++)
       s += chars[i];
     return s;
   }

   /* Public API */

   public GdkClasspathFontPeer (String name, int style, int size)
   {
     super(name, style, size);
     initState ();
     setFont (this.familyName, this.style, (int)this.size);
   }

   public GdkClasspathFontPeer (String name, Map attributes)
   {
     super(name, attributes);
     initState ();
     setFont (this.familyName, this.style, (int)this.size);
   }

   public String getSubFamilyName(Font font, Locale locale)
   {
     return null;
   }

   public String getPostScriptName(Font font)
   {
     return null;
   }

   public boolean canDisplay (Font font, char c)
   {
     throw new UnsupportedOperationException ();
   }

   public int canDisplayUpTo (Font font, CharacterIterator i, int start, int limit)
   {
     throw new UnsupportedOperationException ();
   }

   public GlyphVector createGlyphVector (Font font,
                                         FontRenderContext ctx,
                                         CharacterIterator i)
   {
     return new GdkGlyphVector(font, this, ctx, buildString (i));
   }

   public GlyphVector createGlyphVector (Font font,
                                         FontRenderContext ctx,
                                         int[] glyphCodes)
   {
     return new GdkGlyphVector (font, this, ctx, glyphCodes);
   }

   public byte getBaselineFor (Font font, char c)
   {
     throw new UnsupportedOperationException ();
   }

   protected class GdkFontLineMetrics extends LineMetrics
   {
     FontMetrics fm;
     int nchars;

     public GdkFontLineMetrics (FontMetrics m, int n)
     {
       fm = m;
       nchars = n;
     }

     public float getAscent()
     {
       return (float) fm.getAscent ();
     }

     public int getBaselineIndex()
     {
       return Font.ROMAN_BASELINE;
     }

     public float[] getBaselineOffsets()
     {
       return new float[3];
     }

     public float getDescent()
     {
       return (float) fm.getDescent ();
     }

     public float getHeight()
     {
       return (float) fm.getHeight ();
     }

     public float getLeading() { return 0.f; }
     public int getNumChars() { return nchars; }
     public float getStrikethroughOffset() { return 0.f; }
     public float getStrikethroughThickness() { return 0.f; }
     public float getUnderlineOffset() { return 0.f; }
     public float getUnderlineThickness() { return 0.f; }

   }


   public LineMetrics getLineMetrics (Font font, CharacterIterator ci,
                                      int begin, int limit, FontRenderContext rc)
   {
     return new GdkFontLineMetrics (getFontMetrics (font), limit - begin);
   }

   public Rectangle2D getMaxCharBounds (Font font, FontRenderContext rc)
   {
     throw new UnsupportedOperationException ();
   }

   public int getMissingGlyphCode (Font font)
   {
     throw new UnsupportedOperationException ();
   }

   public String getGlyphName (Font font, int glyphIndex)
   {
     throw new UnsupportedOperationException ();
   }

   public int getNumGlyphs (Font font)
   {
     throw new UnsupportedOperationException ();
   }

   public Rectangle2D getStringBounds (Font font, CharacterIterator ci,
                                       int begin, int limit, FontRenderContext frc)
   {
     throw new UnsupportedOperationException ();
   }

   public boolean hasUniformLineMetrics (Font font)
   {
     return true;
   }

   public GlyphVector layoutGlyphVector (Font font, FontRenderContext frc,
                                         char[] chars, int start, int limit,
                                         int flags)
   {
     int nchars = (limit - start) + 1;
     char[] nc = new char[nchars];

     for (int i = 0; i < nchars; ++i)
       nc[i] = chars[start + i];

     return createGlyphVector (font, frc,
                               new StringCharacterIterator (new String (nc)));
   }

   public LineMetrics getLineMetrics (Font font, String str,
                                      FontRenderContext frc)
   {
     return new GdkFontLineMetrics (getFontMetrics (font), str.length ());
   }

   public FontMetrics getFontMetrics (Font font)
   {
     return new GdkClasspathFontPeerMetrics (font);
   }

 }
	/* GdkClasspathFontPeer.java -- backend implementation for Font object
	Copyright (C) 2003 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., 59 Temple Place, Suite 330, Boston, MA
	02111-1307 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 java.awt.*;
	import java.awt.font.*;
	import java.awt.geom.*;
	import java.io.InputStream;
	import java.io.IOException;
	import java.io.Serializable;
	import java.util.Locale;
	import java.util.Map;
	import java.util.StringTokenizer;
	import java.text.CharacterIterator;
	import java.text.AttributedCharacterIterator;
	import java.text.StringCharacterIterator;
	import java.awt.font.TextAttribute;
	import gnu.classpath.Configuration;
	import gnu.java.awt.peer.ClasspathFontPeer;

	/**
	* This class represents a windowing system font using the Pango
	* unicode/glyph/font library and the Cairo rendering library.
	*
	* @author Graydon Hoare (graydon@redhat.com)
	*/

	public class GdkClasspathFontPeer extends ClasspathFontPeer
	{

	static
	{
	if (Configuration.INIT_LOAD_LIBRARY)
	{
	System.loadLibrary("gtkpeer");
	}
	initStaticState ();
	}
	native static void initStaticState ();
	private final int native_state = GtkGenericPeer.getUniqueInteger ();


	/* Instance Variables */

	private native void initState ();
	private native void dispose ();
	private native void setFont (String family, int style, int size);

	protected void sync ()
	{
	this.setFont (this.familyName, this.style, (int)this.size);
	}

	protected void finalize ()
	{
	dispose ();
	}

	/*
	* Helpers for the 3-way overloading that this class seems to suffer
	* from. Remove them if you feel like they're a performance bottleneck,
	* for the time being I prefer my code not be written and debugged in
	* triplicate.
	*/

	private String buildString(CharacterIterator i) {
	String s = new String ();
	for(char c = i.first(); c != CharacterIterator.DONE; c = i.next())
	s += c;
	return s;
	}

	private String buildString(CharacterIterator iter, int begin, int limit) {
	String s = new String ();
	int i = 0;
	for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next(), i++)
	{
	if (begin <= i)
	s += c;
	if (limit <= i)
	break;
	}
	return s;
	}

	private String buildString(char[] chars, int begin, int limit) {
	String s = new String ();
	for(int i = begin; i <= limit; i++)
	s += chars[i];
	return s;
	}

	/* Public API */

	public GdkClasspathFontPeer (String name, int style, int size)
	{
	super(name, style, size);
	initState ();
	setFont (this.familyName, this.style, (int)this.size);
	}

	public GdkClasspathFontPeer (String name, Map attributes)
	{
	super(name, attributes);
	initState ();
	setFont (this.familyName, this.style, (int)this.size);
	}

	public String getSubFamilyName(Font font, Locale locale)
	{
	return null;
	}

	public String getPostScriptName(Font font)
	{
	return null;
	}

	public boolean canDisplay (Font font, char c)
	{
	throw new UnsupportedOperationException ();
	}

	public int canDisplayUpTo (Font font, CharacterIterator i, int start, int limit)
	{
	throw new UnsupportedOperationException ();
	}

	public GlyphVector createGlyphVector (Font font,
	FontRenderContext ctx,
	CharacterIterator i)
	{
	return new GdkGlyphVector(font, this, ctx, buildString (i));
	}

	public GlyphVector createGlyphVector (Font font,
	FontRenderContext ctx,
	int[] glyphCodes)
	{
	return new GdkGlyphVector (font, this, ctx, glyphCodes);
	}

	public byte getBaselineFor (Font font, char c)
	{
	throw new UnsupportedOperationException ();
	}

	protected class GdkFontLineMetrics extends LineMetrics
	{
	FontMetrics fm;
	int nchars;

	public GdkFontLineMetrics (FontMetrics m, int n)
	{
	fm = m;
	nchars = n;
	}

	public float getAscent()
	{
	return (float) fm.getAscent ();
	}

	public int getBaselineIndex()
	{
	return Font.ROMAN_BASELINE;
	}

	public float[] getBaselineOffsets()
	{
	return new float[3];
	}

	public float getDescent()
	{
	return (float) fm.getDescent ();
	}

	public float getHeight()
	{
	return (float) fm.getHeight ();
	}

	public float getLeading() { return 0.f; }
	public int getNumChars() { return nchars; }
	public float getStrikethroughOffset() { return 0.f; }
	public float getStrikethroughThickness() { return 0.f; }
	public float getUnderlineOffset() { return 0.f; }
	public float getUnderlineThickness() { return 0.f; }

	}


	public LineMetrics getLineMetrics (Font font, CharacterIterator ci,
	int begin, int limit, FontRenderContext rc)
	{
	return new GdkFontLineMetrics (getFontMetrics (font), limit - begin);
	}

	public Rectangle2D getMaxCharBounds (Font font, FontRenderContext rc)
	{
	throw new UnsupportedOperationException ();
	}

	public int getMissingGlyphCode (Font font)
	{
	throw new UnsupportedOperationException ();
	}

	public String getGlyphName (Font font, int glyphIndex)
	{
	throw new UnsupportedOperationException ();
	}

	public int getNumGlyphs (Font font)
	{
	throw new UnsupportedOperationException ();
	}

	public Rectangle2D getStringBounds (Font font, CharacterIterator ci,
	int begin, int limit, FontRenderContext frc)
	{
	throw new UnsupportedOperationException ();
	}

	public boolean hasUniformLineMetrics (Font font)
	{
	return true;
	}

	public GlyphVector layoutGlyphVector (Font font, FontRenderContext frc,
	char[] chars, int start, int limit,
	int flags)
	{
	int nchars = (limit - start) + 1;
	char[] nc = new char[nchars];

	for (int i = 0; i < nchars; ++i)
	nc[i] = chars[start + i];

	return createGlyphVector (font, frc,
	new StringCharacterIterator (new String (nc)));
	}

	public LineMetrics getLineMetrics (Font font, String str,
	FontRenderContext frc)
	{
	return new GdkFontLineMetrics (getFontMetrics (font), str.length ());
	}

	public FontMetrics getFontMetrics (Font font)
	{
	return new GdkClasspathFontPeerMetrics (font);
	}

	}