| /* |
| * 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(); |
| |
| } |