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Parses XML to PDF, with CSS support, using iText
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/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2022 iText Group NV
* Authors: Balder Van Camp, Emiel Ackermann, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.tool.xml.css.apply;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Paragraph;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.css.CSS;
import com.itextpdf.tool.xml.css.CssUtils;
import com.itextpdf.tool.xml.css.FontSizeTranslator;
import com.itextpdf.tool.xml.html.CssApplier;
import com.itextpdf.tool.xml.html.CssAppliers;
import com.itextpdf.tool.xml.html.HTML;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
import java.util.Map;
import java.util.Map.Entry;
/**
* Applies CSS on a {@link Paragraph}
*
* @author itextpdf.com
*/
public class ParagraphCssApplier implements CssApplier {
private final CssAppliers appliers;
/**
* Construct a ParagraphCssApplier.
*
*/
public ParagraphCssApplier(final CssAppliers appliers) {
this.appliers = appliers;
}
/**
* Styles a paragraph
*
* @param p the paragraph
* @param t the tag
* @param configuration the MarginMemory
* @return a styled {@link Paragraph}
*/
public Paragraph apply(final Paragraph p, final Tag t, final MarginMemory configuration) {
return apply(p, t, configuration, null, null);
}
public Paragraph apply(final Paragraph p, final Tag t, final MarginMemory configuration, final PageSizeContainable psc, final HtmlPipelineContext ctx) {
/*MaxLeadingAndSize m = new MaxLeadingAndSize();
if (configuration.getRootTags().contains(t.getName())) {
m.setLeading(t);
} else {
m.setVariablesBasedOnChildren(t);
}*/
final CssUtils utils = CssUtils.getInstance();
float fontSize = FontSizeTranslator.getInstance().getFontSize(t);
if (fontSize == Font.UNDEFINED) fontSize = 0;
float lmb = 0;
boolean hasLMB = false;
Map css = t.getCSS();
for (Entry entry : css.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
if (CSS.Property.MARGIN_TOP.equalsIgnoreCase(key)) {
p.setSpacingBefore(p.getSpacingBefore() + utils.calculateMarginTop(value, fontSize, configuration));
} else if (CSS.Property.PADDING_TOP.equalsIgnoreCase(key)) {
p.setSpacingBefore(p.getSpacingBefore() + utils.parseValueToPt(value, fontSize));
p.setPaddingTop(utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.MARGIN_BOTTOM.equalsIgnoreCase(key)) {
float after = utils.parseValueToPt(value, fontSize);
p.setSpacingAfter(p.getSpacingAfter() + after);
lmb = after;
hasLMB = true;
} else if (CSS.Property.PADDING_BOTTOM.equalsIgnoreCase(key)) {
p.setSpacingAfter(p.getSpacingAfter() + utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.MARGIN_LEFT.equalsIgnoreCase(key)) {
p.setIndentationLeft(p.getIndentationLeft() + utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.MARGIN_RIGHT.equalsIgnoreCase(key)) {
p.setIndentationRight(p.getIndentationRight() + utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.PADDING_LEFT.equalsIgnoreCase(key)) {
p.setIndentationLeft(p.getIndentationLeft() + utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.PADDING_RIGHT.equalsIgnoreCase(key)) {
p.setIndentationRight(p.getIndentationRight() + utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.TEXT_ALIGN.equalsIgnoreCase(key)) {
p.setAlignment(CSS.getElementAlignment(value));
} else if (CSS.Property.TEXT_INDENT.equalsIgnoreCase(key)) {
p.setFirstLineIndent(utils.parseValueToPt(value, fontSize));
} else if (CSS.Property.LINE_HEIGHT.equalsIgnoreCase(key)) {
if(utils.isNumericValue(value)) {
p.setLeading(Float.parseFloat(value) * fontSize);
} else if (utils.isRelativeValue(value)) {
p.setLeading(utils.parseRelativeValue(value, fontSize));
} else if (utils.isMetricValue(value)){
p.setLeading(utils.parsePxInCmMmPcToPt(value));
}
}
}
if ( t.getAttributes().containsKey(HTML.Attribute.ALIGN)) {
String value = t.getAttributes().get(HTML.Attribute.ALIGN);
if ( value != null ) {
p.setAlignment(CSS.getElementAlignment(value));
}
}
// setDefaultMargin to largestFont if no margin-bottom is set and p-tag is child of the root tag.
/*if (null != t.getParent()) {
String parent = t.getParent().getName();
if (css.get(CSS.Property.MARGIN_TOP) == null && configuration.getRootTags().contains(parent)) {
p.setSpacingBefore(p.getSpacingBefore() + utils.calculateMarginTop(fontSize + "pt", 0, configuration));
}
if (css.get(CSS.Property.MARGIN_BOTTOM) == null && configuration.getRootTags().contains(parent)) {
p.setSpacingAfter(p.getSpacingAfter() + fontSize);
css.put(CSS.Property.MARGIN_BOTTOM, fontSize + "pt");
lmb = fontSize;
hasLMB = true;
}
//p.setLeading(m.getLargestLeading()); We need possibility to detect that line-height undefined;
if (p.getAlignment() == -1) {
p.setAlignment(Element.ALIGN_LEFT);
}
}*/
if (hasLMB) {
configuration.setLastMarginBottom(lmb);
}
Font font = appliers.getChunkCssAplier().applyFontStyles(t);
p.setFont(font);
// TODO reactive for positioning and implement more
// if(null != configuration.getWriter() && null != css.get("position")) {
// positionNoNewLineParagraph(p, css);
// p = null;
// }
return p;
}
// private void positionParagraph(final Paragraph p, final Map css) {
// PdfContentByte canvas = configuration.getWriter().getDirectContent();
// ColumnText ct = new ColumnText(canvas);
// float remainingWidth = configuration.getPageSize().getWidth();
// int numberOfLines = 1;
// float llx = 0;
// float lly = 0;
// float urx = 0;
// float ury = 0;
// if(null != css.get(CSS.Value.LEFT)) {
// llx = utils.parsePxInCmMmPcToPt(css.get(CSS.Value.LEFT));
// remainingWidth -= llx;
// } else if(null != css.get(CSS.Value.RIGHT)) { // in html right is ignored if left is set.
// urx = utils.parsePxInCmMmPcToPt(css.get(CSS.Value.RIGHT));
// remainingWidth -= urx;
// }
// if(llx == 0) {
// llx = urx;
// for(Chunk c: p.getChunks()) {
// remainingWidth -= c.getWidthPoint();
// llx -= c.getWidthPoint();
// if(remainingWidth < 0) {
// numberOfLines++;
// remainingWidth = configuration.getPageSize().getWidth()-urx-Math.abs(remainingWidth);
// }
// }
// if(llx < 0) {
// llx = 0;
// }
// } else if(urx == 0) {
// urx = llx;
// for(Chunk c: p.getChunks()) {
// remainingWidth -= c.getWidthPoint();
// urx += c.getWidthPoint();
// if(remainingWidth < 0) {
// numberOfLines++;
// remainingWidth = configuration.getPageSize().getWidth()-llx-Math.abs(remainingWidth);
// }
// }
// if(urx > configuration.getPageSize().getWidth()) {
// urx = configuration.getPageSize().getWidth();
// }
//// urx += p.getFirstLineIndent() + p.getIndentationLeft() + p.getIndentationRight();
// } else {
// for(Chunk c: p.getChunks()) {
// remainingWidth -= c.getWidthPoint();
// if(remainingWidth < 0) {
// numberOfLines++;
// remainingWidth = configuration.getPageSize().getWidth()-llx-urx-Math.abs(remainingWidth);
// }
// }
// }
// if(null != css.get(CSS.Property.TOP)) {
// ury = -utils.parsePxInCmMmPcToPt(css.get(CSS.Property.TOP))-p.getSpacingBefore();
// }
// if(css.get(CSS.Property.POSITION).equalsIgnoreCase(CSS.Value.RELATIVE)) {
// float textHeight = utils.validateTextHeight(css, p.getLeading() * numberOfLines);
// if (configuration.getMemory().get(XMLWorkerConfig.VERTICAL_POSITION) == null) {
// ury += configuration.getWriter().getVerticalPosition(false);
// } else {
// ury += (Float)configuration.getMemory().get(XMLWorkerConfig.VERTICAL_POSITION);
// }
// lly = ury - textHeight;
// configuration.getMemory().put(XMLWorkerConfig.VERTICAL_POSITION, textHeight + p.getSpacingBefore() + p.getSpacingAfter());
// } else { //position:"absolute"
// lly = ury - utils.validateTextHeight(css, p.getLeading()*numberOfLines);
// }
// ct.setSimpleColumn(p, llx, lly, urx, ury, p.getLeading(), p.getAlignment());
// if(null != css.get(CSS.Property.BACKGROUND_COLOR)) {
// canvas.setColorFill(HtmlUtilities.decodeColor(css.get(CSS.Property.BACKGROUND_COLOR)));
// llx -= p.getIndentationLeft();
// lly -= utils.checkMetricStyle(css, CSS.Property.PADDING_BOTTOM) + p.getLeading()/3.5f;
// urx += p.getIndentationRight();
// ury += utils.checkMetricStyle(css, CSS.Property.PADDING_TOP);
// canvas.rectangle(llx, lly, urx-llx, ury-lly);
// canvas.fill();
// }
// try {
// ct.go();
// } catch (DocumentException e) {
// throw new RuntimeWorkerException(e);
// }
// }
}