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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.inline;
-
- import org.apache.fop.area.Trait;
- import org.apache.fop.area.inline.InlineArea;
- import org.apache.fop.area.inline.TextArea;
- import org.apache.fop.fo.flow.PageNumber;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontTriplet;
- import org.apache.fop.layoutmgr.LayoutContext;
- import org.apache.fop.layoutmgr.TraitSetter;
- import org.apache.fop.traits.MinOptMax;
-
- /**
- * LayoutManager for the fo:page-number formatting object
- */
- public class PageNumberLayoutManager extends LeafNodeLayoutManager {
-
- private PageNumber fobj;
- private Font font;
-
- /**
- * Constructor
- *
- * @param node the fo:page-number formatting object that creates the area
- * TODO better null checking of node, font
- */
- public PageNumberLayoutManager(PageNumber node) {
- super(node);
- fobj = node;
- }
-
- /** {@inheritDoc} */
- public void initialize() {
- FontInfo fi = fobj.getFOEventHandler().getFontInfo();
- FontTriplet[] fontkeys = fobj.getCommonFont().getFontState(fi);
- font = fi.getFontInstance(fontkeys[0], fobj.getCommonFont().fontSize.getValue(this));
- setCommonBorderPaddingBackground(fobj.getCommonBorderPaddingBackground());
- }
-
- /**
- * {@inheritDoc}
- * #makeAlignmentContext(LayoutContext)
- */
- protected AlignmentContext makeAlignmentContext(LayoutContext context) {
- return new AlignmentContext(
- font
- , fobj.getLineHeight().getOptimum(this).getLength().getValue(this)
- , fobj.getAlignmentAdjust()
- , fobj.getAlignmentBaseline()
- , fobj.getBaselineShift()
- , fobj.getDominantBaseline()
- , context.getAlignmentContext()
- );
- }
-
- /** {@inheritDoc} */
- public InlineArea get(LayoutContext context) {
- // get page string from parent, build area
- TextArea text = new TextArea();
- String str = getCurrentPV().getPageNumberString();
- int width = getStringWidth(str);
- text.addWord(str, 0);
- text.setIPD(width);
- text.setBPD(font.getAscender() - font.getDescender());
- text.setBaselineOffset(font.getAscender());
- TraitSetter.addFontTraits(text, font);
- text.addTrait(Trait.COLOR, fobj.getColor());
- TraitSetter.addStructureTreeElement(text, fobj.getStructureTreeElement());
- TraitSetter.addTextDecoration(text, fobj.getTextDecoration());
-
- return text;
- }
-
- /** {@inheritDoc} */
- protected InlineArea getEffectiveArea() {
- TextArea baseArea = (TextArea)curArea;
- //TODO Maybe replace that with a clone() call or better, a copy constructor
- //TODO or even better: delay area creation until addAreas() stage
- //TextArea is cloned because the LM is reused in static areas and the area can't be.
- TextArea ta = new TextArea();
- TraitSetter.setProducerID(ta, fobj.getId());
- ta.setIPD(baseArea.getIPD());
- ta.setBPD(baseArea.getBPD());
- ta.setOffset(baseArea.getOffset());
- ta.setBaselineOffset(baseArea.getBaselineOffset());
- ta.addTrait(Trait.COLOR, fobj.getColor()); //only to initialize the trait map
- ta.getTraits().putAll(baseArea.getTraits());
- updateContent(ta);
- return ta;
- }
-
- private void updateContent(TextArea area) {
- // get the page number of the page actually being built
- area.removeText();
- area.addWord(getCurrentPV().getPageNumberString(), 0);
- // update the ipd of the area
- area.handleIPDVariation(getStringWidth(area.getText()) - area.getIPD());
- // update the width stored in the AreaInfo object
- areaInfo.ipdArea = MinOptMax.getInstance(area.getIPD());
- }
-
- /**
- * @param str string to be measured
- * @return width of the string
- */
- private int getStringWidth(String str) {
- int width = 0;
- for (int count = 0; count < str.length(); count++) {
- width += font.getCharWidth(str.charAt(count));
- }
- return width;
- }
-
- }
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