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- /*
- * $Id: FOText.java,v 1.43 2003/03/05 21:48:01 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
- package org.apache.fop.fo;
-
- // Java
- import java.util.NoSuchElementException;
- import java.util.List;
-
- // FOP
- import org.apache.fop.layout.TextState;
- import org.apache.fop.layoutmgr.LayoutManager;
- import org.apache.fop.layoutmgr.TextLayoutManager;
- import org.apache.fop.apps.StructureHandler;
- import org.apache.fop.fo.properties.WhiteSpaceCollapse;
-
- /**
- * A text node in the formatting object tree.
- *
- * Modified by Mark Lillywhite, mark-fop@inomial.com.
- * Unfortunately the BufferManager implementatation holds
- * onto references to the character data in this object
- * longer than the lifetime of the object itself, causing
- * excessive memory consumption and OOM errors.
- */
- public class FOText extends FObj {
-
- protected char[] ca;
- protected int start;
- protected int length;
- TextInfo textInfo;
- TextState ts;
-
- public FOText(char[] chars, int s, int e, TextInfo ti) {
- super(null);
- this.start = 0;
- this.ca = new char[e - s];
- System.arraycopy(chars, s, ca, 0, e - s);
- this.length = e - s;
- textInfo = ti;
- }
-
- public void setStructHandler(StructureHandler st) {
- super.setStructHandler(st);
- structHandler.characters(ca, start, length);
- }
-
- /**
- * Check if this text node will create an area.
- * This means either there is non-whitespace or it is
- * preserved whitespace.
- * Maybe this just needs to check length > 0, since char iterators
- * handle whitespace.
- *
- * @return true if this will create an area in the output
- */
- public boolean willCreateArea() {
- if (textInfo.whiteSpaceCollapse == WhiteSpaceCollapse.FALSE
- && length > 0) {
- return true;
- }
-
- for (int i = start; i < start + length; i++) {
- char ch = ca[i];
- if (!((ch == ' ')
- || (ch == '\n')
- || (ch == '\r')
- || (ch == '\t'))) { // whitespace
- return true;
- }
- }
- return false;
- }
-
- public void addLayoutManager(List list) {
- // if nothing left (length=0)?
- if (length == 0) {
- return;
- }
-
- if (length < ca.length) {
- char[] tmp = ca;
- ca = new char[length];
- System.arraycopy(tmp, 0, ca, 0, length);
- }
- LayoutManager lm = new TextLayoutManager(ca, textInfo);
- lm.setFObj(this);
- list.add(lm);
- }
-
- public CharIterator charIterator() {
- return new TextCharIterator();
- }
-
- private class TextCharIterator extends AbstractCharIterator {
- private int curIndex = 0;
-
- public boolean hasNext() {
- return (curIndex < length);
- }
-
- public char nextChar() {
- if (curIndex < length) {
- // Just a char class? Don't actually care about the value!
- return ca[curIndex++];
- } else {
- throw new NoSuchElementException();
- }
- }
-
- public void remove() {
- if (curIndex > 0 && curIndex < length) {
- // copy from curIndex to end to curIndex-1
- System.arraycopy(ca, curIndex, ca, curIndex - 1,
- length - curIndex);
- length--;
- curIndex--;
- } else if (curIndex == length) {
- curIndex = --length;
- }
- }
-
-
- public void replaceChar(char c) {
- if (curIndex > 0 && curIndex <= length) {
- ca[curIndex - 1] = c;
- }
- }
-
-
- }
- }
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