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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.Area;
import org.apache.fop.layout.BlockArea;
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.TextLayoutManager;
import java.util.NoSuchElementException;
/**
* 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 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;
}
// Just to keep PageNumber and PageNumber citation happy for now.
// The real code is moved to TextLayoutManager!
public static int addText(BlockArea ba, FontState fontState, float red,
float green, float blue, int wrapOption,
LinkSet ls, int whiteSpaceCollapse,
char data[], int start, int end,
TextState textState, int vAlign) {
return 0;
}
public LayoutManager getLayoutManager() {
// What if nothing left (length=0)?
if (length < ca.length) {
char[] tmp = ca;
ca = new char[length];
System.arraycopy(tmp, 0, ca, 0, length);
}
return new TextLayoutManager(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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