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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources."
*/
package org.apache.fop.fo;
// FOP
import org.apache.fop.layout.FontState;
import org.apache.fop.layout.*;
import org.apache.fop.datatypes.*;
import org.apache.fop.fo.properties.*;
import org.apache.fop.apps.FOPException;
import org.apache.fop.layoutmgr.LayoutManager;
import org.apache.fop.layoutmgr.TextBPLayoutManager;
import org.apache.fop.apps.StructureHandler;
import java.util.NoSuchElementException;
import java.util.List;
/**
* 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);
}
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);
}
list.add(new TextBPLayoutManager(this, ca, textInfo));
}
public CharIterator charIterator() {
return new TextCharIterator();
}
private class TextCharIterator extends AbstractCharIterator {
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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