canvas/source/java/TextLayout.java

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: TextLayout.java,v $
  10  * $Revision: 1.6 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // Canvas
  32 import com.sun.star.rendering.*;
  33
  34 public class TextLayout
  35     extends com.sun.star.lib.uno.helper.ComponentBase
  36     implements com.sun.star.lang.XServiceInfo,
  37                com.sun.star.rendering.XTextLayout
  38 {
  39     private double[]            advancements;
  40     private StringContext       text;
  41     private byte                direction;
  42     private CanvasBase                  associatedCanvas;
  43     private CanvasFont                  font;
  44
  45     //----------------------------------------------------------------------------------
  46
  47     public TextLayout( StringContext     aText,
  48                        byte              nDirection,
  49                        long              nRandomSeed,
  50                        CanvasFont       _font,
  51                        CanvasBase               _canvas )
  52     {
  53         text = aText;
  54         direction = nDirection;
  55         associatedCanvas = _canvas;
  56         font = _font;
  57     }
  58
  59     //
  60     // XTextLayout implementation
  61     // ==========================
  62     //
  63
  64     public XPolyPolygon2D[] queryTextShapes(  )
  65     {
  66         // TODO
  67         return null;
  68     }
  69
  70     public com.sun.star.geometry.RealRectangle2D[] queryInkMeasures(  )
  71     {
  72         // TODO
  73         return null;
  74     }
  75
  76     public com.sun.star.geometry.RealRectangle2D[] queryMeasures(  )
  77     {
  78         // TODO
  79         return null;
  80     }
  81
  82     public double[] queryLogicalAdvancements(  )
  83     {
  84         // TODO
  85         return null;
  86     }
  87
  88     public void applyLogicalAdvancements( double[] aAdvancements ) throws com.sun.star.lang.IllegalArgumentException
  89     {
  90         if( aAdvancements.length != text.Length )
  91             throw new com.sun.star.lang.IllegalArgumentException();
  92
  93         advancements = aAdvancements;
  94     }
  95
  96     public com.sun.star.geometry.RealRectangle2D queryTextBounds(  )
  97     {
  98         // TODO
  99         return null;
 100     }
 101
 102     public double justify( double nSize ) throws com.sun.star.lang.IllegalArgumentException
 103     {
 104         // TODO
 105         return 0;
 106     }
 107
 108     public double combinedJustify( XTextLayout[] aNextLayouts, double nSize ) throws com.sun.star.lang.IllegalArgumentException
 109     {
 110         // TODO
 111         return 0;
 112     }
 113
 114     public TextHit getTextHit( /*IN*/com.sun.star.geometry.RealPoint2D aHitPoint )
 115     {
 116         // TODO
 117         return null;
 118     }
 119
 120     public Caret getCaret( int nInsertionIndex, boolean bExcludeLigatures ) throws com.sun.star.lang.IndexOutOfBoundsException
 121     {
 122         // TODO
 123         return null;
 124     }
 125
 126     public int getNextInsertionIndex( int nStartIndex, int nCaretAdvancement, boolean bExcludeLigatures ) throws com.sun.star.lang.IndexOutOfBoundsException
 127     {
 128         // TODO
 129         return 0;
 130     }
 131
 132     public XPolyPolygon2D queryVisualHighlighting( int nStartIndex, int nEndIndex ) throws com.sun.star.lang.IndexOutOfBoundsException
 133     {
 134         // TODO
 135         return null;
 136     }
 137
 138     public XPolyPolygon2D queryLogicalHighlighting( int nStartIndex, int nEndIndex ) throws com.sun.star.lang.IndexOutOfBoundsException
 139     {
 140         // TODO
 141         return null;
 142     }
 143
 144     public double getBaselineOffset(  )
 145     {
 146         // TODO
 147         return 0.0;
 148     }
 149
 150     public byte getMainTextDirection(  )
 151     {
 152         return direction;
 153     }
 154
 155     public XCanvasFont getFont(  )
 156     {
 157         return font;
 158     }
 159
 160     public StringContext getText(  )
 161     {
 162         return text;
 163     }
 164
 165     public boolean draw( java.awt.Graphics2D graphics )
 166     {
 167         // TODO: use proper advancement. Text direction need not be horizontal!
 168         // TODO: given text string need not have a one-to-one relationship between code point and glyph (offset)!
 169         graphics.drawString( text.Text.substring(text.StartPosition, text.StartPosition + 1), (float)0.0, (float)0.0 );
 170         for( int i=1; i<advancements.length && i<text.Length; ++i )
 171         {
 172             CanvasUtils.printLog( "XCanvas: drawOffsettedText rendering a \"" +
 173                                   text.Text.substring(text.StartPosition + i,
 174                                                       text.StartPosition + i + 1) +
 175                                   "\" (position " + (text.StartPosition + i) +
 176                                   " of " + text.Text + ", offset " + advancements[i] + ")" );
 177
 178             graphics.drawString( text.Text.substring(text.StartPosition + i, text.StartPosition + i + 1), (float)advancements[i-1], (float)0.0 );
 179         }
 180
 181         return true;
 182     }
 183
 184     //----------------------------------------------------------------------------------
 185
 186     //
 187     // XServiceInfo impl
 188     // =================
 189     //
 190
 191     private static final String s_implName = "CanvasFont.java.impl";
 192     private static final String s_serviceName = "com.sun.star.rendering.XCanvasFont";
 193
 194     public String getImplementationName()
 195     {
 196         return s_implName;
 197     }
 198
 199     public String [] getSupportedServiceNames()
 200     {
 201         return new String [] { s_serviceName };
 202     }
 203
 204     public boolean supportsService( String serviceName )
 205     {
 206         return serviceName.equals( s_serviceName );
 207     }
 208 }