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/*
* Copyright 2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.layoutmgr;
import java.util.List;
import org.apache.fop.fo.Constants;
/**
* This class represents an unresolved break possibility.
*/
public class BreakElement extends UnresolvedListElement {
private int penaltyWidth;
private int penaltyValue;
private int breakClass = -1;
private List pendingBeforeMarks;
private List pendingAfterMarks;
/**
* Main constructor
* @param position the Position instance needed by the addAreas stage of the LMs.
* @param penaltyValue the penalty value for the penalty element to be constructed
* @param context the layout context which contains the pending conditional elements
*/
public BreakElement(Position position, int penaltyValue, LayoutContext context) {
this(position, 0, penaltyValue, -1, context);
}
/**
* Constructor for hard breaks.
* @param position the Position instance needed by the addAreas stage of the LMs.
* @param penaltyWidth the penalty width
* @param penaltyValue the penalty value for the penalty element to be constructed
* @param breakClass the break class of this penalty (one of the break-* constants)
* @param context the layout context which contains the pending conditional elements
*/
public BreakElement(Position position, int penaltyWidth, int penaltyValue,
int breakClass, LayoutContext context) {
super(position);
this.penaltyWidth = penaltyWidth;
this.penaltyValue = penaltyValue;
this.breakClass = breakClass;
this.pendingBeforeMarks = context.getPendingBeforeMarks();
this.pendingAfterMarks = context.getPendingAfterMarks();
}
/** @see org.apache.fop.layoutmgr.UnresolvedListElement#isConditional() */
public boolean isConditional() {
return false; //Does not really apply here
}
/** @see org.apache.fop.layoutmgr.ListElement#isPenalty() */
/*
public boolean isPenalty() {
return true; //not entirely true but a BreakElement will generate a penalty later
}*/
/** @return the penalty width */
public int getPenaltyWidth() {
return this.penaltyWidth;
}
/** @return the penalty value */
public int getPenaltyValue() {
return this.penaltyValue;
}
/**
* Sets the penalty value.
* @param p the new penalty value
*/
public void setPenaltyValue(int p) {
this.penaltyValue = p;
}
/** @see org.apache.fop.layoutmgr.ListElement#isForcedBreak() */
public boolean isForcedBreak() {
return penaltyValue == -KnuthElement.INFINITE;
}
/** @return the break class of this penalty (one of the break-* constants) */
public int getBreakClass() {
return breakClass;
}
/**
* Sets the break class.
* @param breakClass the new break class
*/
public void setBreakClass(int breakClass) {
this.breakClass = breakClass;
}
/** @return the pending border and padding elements at the before edge */
public List getPendingBeforeMarks() {
return this.pendingBeforeMarks;
}
/** @return the pending border and padding elements at the after edge */
public List getPendingAfterMarks() {
return this.pendingAfterMarks;
}
/** @see java.lang.Object#toString() */
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("BreakPossibility[p:");
sb.append(this.penaltyValue);
if (isForcedBreak()) {
sb.append(" (forced break");
switch (getBreakClass()) {
case Constants.EN_PAGE:
sb.append(", page");
break;
case Constants.EN_COLUMN:
sb.append(", column");
break;
case Constants.EN_EVEN_PAGE:
sb.append(", even page");
break;
case Constants.EN_ODD_PAGE:
sb.append(", odd page");
break;
default:
}
sb.append(")");
}
sb.append("]");
return sb.toString();
}
}
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