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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.fop.fo.FObj;
- import org.apache.fop.fo.properties.CommonBorderPaddingBackground;
- import org.apache.fop.traits.MinOptMax;
-
- /**
- * A block-stacking layout manager for an FO that supports spaces, border and padding.
- */
- public abstract class SpacedBorderedPaddedBlockLayoutManager extends BlockStackingLayoutManager
- implements ConditionalElementListener {
-
- private static final Log LOG = LogFactory.getLog(BlockLayoutManager.class);
-
- protected MinOptMax effSpaceBefore;
-
- protected MinOptMax effSpaceAfter;
-
- protected boolean discardBorderBefore;
- protected boolean discardBorderAfter;
- protected boolean discardPaddingBefore;
- protected boolean discardPaddingAfter;
-
- public SpacedBorderedPaddedBlockLayoutManager(FObj node) {
- super(node);
- }
-
- public void notifySpace(RelSide side, MinOptMax effectiveLength) {
- if (RelSide.BEFORE == side) {
- if (LOG.isDebugEnabled()) {
- LOG.debug(this + ": Space " + side + ", "
- + this.effSpaceBefore + "-> " + effectiveLength);
- }
- this.effSpaceBefore = effectiveLength;
- } else {
- if (LOG.isDebugEnabled()) {
- LOG.debug(this + ": Space " + side + ", "
- + this.effSpaceAfter + "-> " + effectiveLength);
- }
- this.effSpaceAfter = effectiveLength;
- }
- }
-
- public void notifyBorder(RelSide side, MinOptMax effectiveLength) {
- if (effectiveLength == null) {
- if (RelSide.BEFORE == side) {
- this.discardBorderBefore = true;
- } else {
- this.discardBorderAfter = true;
- }
- }
- if (LOG.isDebugEnabled()) {
- LOG.debug(this + ": Border " + side + " -> " + effectiveLength);
- }
- }
-
- public void notifyPadding(RelSide side, MinOptMax effectiveLength) {
- if (effectiveLength == null) {
- if (RelSide.BEFORE == side) {
- this.discardPaddingBefore = true;
- } else {
- this.discardPaddingAfter = true;
- }
- }
- if (LOG.isDebugEnabled()) {
- LOG.debug(this + ": Padding " + side + " -> " + effectiveLength);
- }
- }
-
- @Override
- public int getBaselineOffset() {
- int baselineOffset = super.getBaselineOffset();
- if (effSpaceBefore != null) {
- baselineOffset += effSpaceBefore.getOpt();
- }
- if (!discardBorderBefore) {
- baselineOffset += getCommonBorderPaddingBackground().getBorderBeforeWidth(false);
- }
- if (!discardPaddingBefore) {
- baselineOffset += getCommonBorderPaddingBackground().getPaddingBefore(false, this);
- }
- return baselineOffset;
- }
-
- /**
- * Returns the {@link CommonBorderPaddingBackground} instance from the FO handled by this layout manager.
- */
- protected abstract CommonBorderPaddingBackground getCommonBorderPaddingBackground();
-
- }
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