/* * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *//* * * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved */ package sun.font; import java.awt.Font;import java.awt.font.FontRenderContext;import java.awt.font.LineMetrics; /** * A text source represents text for rendering, plus context information. * All text in the source uses the same font, metrics, and render context, * and is at the same bidi level. */ public abstract class TextSource {  /** Source character data. */  public abstract char[] getChars();   /** Start of source data in char array returned from getChars. */  public abstract int getStart();   /** Length of source data. */  public abstract int getLength();   /** Start of context data in char array returned from getChars. */  public abstract int getContextStart();   /** Length of context data. */  public abstract int getContextLength();   /** Return the layout flags */  public abstract int getLayoutFlags();   /** Bidi level of all the characters in context. */  public abstract int getBidiLevel();   /** Font for source data. */  public abstract Font getFont();   /** Font render context to use when measuring or rendering source data. */  public abstract FontRenderContext getFRC();   /** Line metrics for source data. */  public abstract CoreMetrics getCoreMetrics();   /** Get subrange of this TextSource. dir is one of the TextLineComponent constants */  public abstract TextSource getSubSource(int start, int length, int dir);   /** Constant for toString(boolean).  Indicates that toString should not return info      outside of the context of this instance. */  public static final boolean WITHOUT_CONTEXT = false;   /** Constant for toString(boolean).  Indicates that toString should return info      outside of the context of this instance. */  public static final boolean WITH_CONTEXT = true;   /** Get debugging info about this TextSource instance. Default implementation just      returns toString.  Subclasses should implement this to match the semantics of      the toString constants. */  public abstract String toString(boolean withContext);}