com.itextpdf.tool.xml.html.ParaGraph Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of xmlworker Show documentation
Show all versions of xmlworker Show documentation
Parses XML to PDF, with CSS support, using iText
/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2020 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.html;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Element;
import com.itextpdf.text.ListItem;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.draw.LineSeparator;
import com.itextpdf.text.pdf.draw.VerticalPositionMark;
import com.itextpdf.tool.xml.NoCustomContextException;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.WorkerContext;
import com.itextpdf.tool.xml.css.CSS;
import com.itextpdf.tool.xml.css.CssUtils;
import com.itextpdf.tool.xml.exceptions.LocaleMessages;
import com.itextpdf.tool.xml.exceptions.RuntimeWorkerException;
import com.itextpdf.tool.xml.html.pdfelement.TabbedChunk;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* @author redlab_b
*
*/
public class ParaGraph extends AbstractTagProcessor {
/*
* (non-Javadoc)
*
* @see
* com.itextpdf.tool.xml.TagProcessor#content(com.itextpdf.tool.xml.Tag,
* java.util.List, com.itextpdf.text.Document, java.lang.String)
*/
@Override
public List content(final WorkerContext ctx, final Tag tag, final String content) {
List sanitizedChunks = HTMLUtils.sanitize(content, false);
List l = new ArrayList(1);
for (Chunk sanitized : sanitizedChunks) {
HtmlPipelineContext myctx;
try {
myctx = getHtmlPipelineContext(ctx);
} catch (NoCustomContextException e) {
throw new RuntimeWorkerException(e);
}
if ((null != tag.getCSS().get(CSS.Property.TAB_INTERVAL))) {
TabbedChunk tabbedChunk = new TabbedChunk(sanitized.getContent());
if (null != getLastChild(tag) && null != getLastChild(tag).getCSS().get(CSS.Property.XFA_TAB_COUNT)) {
tabbedChunk.setTabCount(Integer.parseInt(getLastChild(tag).getCSS().get(CSS.Property.XFA_TAB_COUNT)));
}
l.add(getCssAppliers().apply(tabbedChunk, tag, myctx));
} else if (null != getLastChild(tag) && null != getLastChild(tag).getCSS().get(CSS.Property.XFA_TAB_COUNT)) {
TabbedChunk tabbedChunk = new TabbedChunk(sanitized.getContent());
tabbedChunk.setTabCount(Integer.parseInt(getLastChild(tag).getCSS().get(CSS.Property.XFA_TAB_COUNT)));
l.add(getCssAppliers().apply(tabbedChunk, tag, myctx));
} else {
l.add(getCssAppliers().apply(sanitized, tag, myctx));
}
}
return l;
}
private Tag getLastChild(final Tag tag) {
if (0 != tag.getChildren().size())
return tag.getChildren().get(tag.getChildren().size() - 1);
else
return null;
}
/*
* (non-Javadoc)
*
* @see
* com.itextpdf.tool.xml.TagProcessor#endElement(com.itextpdf.tool.xml.Tag,
* java.util.List, com.itextpdf.text.Document)
*/
@Override
public List end(final WorkerContext ctx, final Tag tag, final List currentContent) {
List l = new ArrayList(1);
if (currentContent.size() > 0) {
List elements = new ArrayList();
List listItems = new ArrayList();
for (Element el : currentContent) {
if (el instanceof ListItem) {
if (!elements.isEmpty()) {
processParagraphItems(ctx, tag, elements, l);
elements.clear();
}
listItems.add((ListItem)el);
} else {
if (!listItems.isEmpty()) {
processListItems(ctx, tag, listItems, l);
listItems.clear();
}
elements.add(el);
}
}
if (!elements.isEmpty()) {
processParagraphItems(ctx, tag, elements, l);
elements.clear();
} else if (!listItems.isEmpty()) {
processListItems(ctx, tag, listItems, l);
listItems.clear();
}
}
return l;
}
protected void processParagraphItems(final WorkerContext ctx, final Tag tag, final List paragraphItems, List l) {
Paragraph p = new Paragraph();
p.setMultipliedLeading(1.2f);
// Element lastElement = paragraphItems.get(paragraphItems.size() - 1);
// if (lastElement instanceof Chunk && Chunk.NEWLINE.getContent().equals(((Chunk) lastElement).getContent())) {
// paragraphItems.remove(paragraphItems.size() - 1);
// }
Map css = tag.getCSS();
if (null != css.get(CSS.Property.TAB_INTERVAL)) {
addTabIntervalContent(ctx, tag, paragraphItems, p, css.get(CSS.Property.TAB_INTERVAL));
l.add(p);
} else if (null != css.get(CSS.Property.TAB_STOPS)) { // paraList = currentContentToParagraph(paragraphItems, true, true, tag, ctx);
if (!l.isEmpty() && !paraList.isEmpty()) {
Element firstElement = paraList.get(0);
if (firstElement instanceof Paragraph ) {
((Paragraph) firstElement).setSpacingBefore(0);
}
}
for (Element e : paraList) {
l.add(e);
}
}
}
protected void processListItems(final WorkerContext ctx, final Tag tag, final List listItems, List l) {
try {
com.itextpdf.text.List list = new com.itextpdf.text.List();
list.setAlignindent(false);
list = (com.itextpdf.text.List) getCssAppliers().apply(list, tag,
getHtmlPipelineContext(ctx));
list.setIndentationLeft(0);
int i = 0;
for (ListItem li : listItems) {
li = (ListItem) getCssAppliers().apply(li, tag, getHtmlPipelineContext(ctx));
if (i != listItems.size() - 1) {
li.setSpacingAfter(0);
}
if (i != 0 ) {
li.setSpacingBefore(0);
}
i++;
li.setMultipliedLeading(1.2f);
list.add(li);
}
if (!l.isEmpty()) {
Element latestElement = l.get(l.size() - 1);
if (latestElement instanceof Paragraph ) {
((Paragraph) latestElement).setSpacingAfter(0);
}
}
l.add(list);
} catch (NoCustomContextException e) {
throw new RuntimeWorkerException(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_CUSTOM_CONTEXT), e);
}
}
/**
* Applies the tab interval of the p tag on its {@link TabbedChunk} elements.
* The style "xfa-tab-count" of the {@link TabbedChunk} is multiplied with the tab interval of the p tag. This width is then added to a new {@link TabbedChunk}.
* Elements other than TabbedChunks are added directly to the given Paragraph p.
*
* @param currentContent containing the elements inside the p tag.
* @param p paragraph to which the tabbed chunks will be added.
* @param value the value of style "tab-interval".
*/
private void addTabIntervalContent(final WorkerContext ctx, final Tag tag, final List currentContent, final Paragraph p, final String value) {
float width = 0;
for(Element e: currentContent) {
if (e instanceof TabbedChunk) {
width += ((TabbedChunk) e).getTabCount()*CssUtils.getInstance().parsePxInCmMmPcToPt(value);
TabbedChunk tab = new TabbedChunk(new VerticalPositionMark(), width, false);
p.add(new Chunk(tab));
p.add(new Chunk((TabbedChunk) e));
} else {
if (e instanceof LineSeparator) {
try {
HtmlPipelineContext htmlPipelineContext = getHtmlPipelineContext(ctx);
Chunk newLine = (Chunk)getCssAppliers().apply(new Chunk(Chunk.NEWLINE), tag, htmlPipelineContext);
p.add(newLine);
} catch (NoCustomContextException e1) {
throw new RuntimeWorkerException(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_CUSTOM_CONTEXT), e1);
}
}
p.add(e);
}
}
}
/**
* Applies the tab stops of the p tag on its {@link TabbedChunk} elements.
*
* @param currentContent containing the elements inside the p tag.
* @param p paragraph to which the tabbed chunks will be added.
* @param value the value of style "tab-stops".
*/
private void addTabStopsContent(final List currentContent, final Paragraph p, final String value) {
List tabs = new ArrayList();
String[] alignAndWidth = value.split(" ");
float tabWidth = 0;
for(int i = 0 , j = 1; j < alignAndWidth.length ; i+=2, j+=2) {
tabWidth += CssUtils.getInstance().parsePxInCmMmPcToPt(alignAndWidth[j]);
TabbedChunk tab = new TabbedChunk(new VerticalPositionMark(), tabWidth, true, alignAndWidth[i]);
tabs.add(tab);
}
int tabsPerRow = tabs.size();
int currentTab = 0;
for(Element e: currentContent) {
if (e instanceof TabbedChunk) {
if(currentTab == tabsPerRow) {
currentTab = 0;
}
if(((TabbedChunk) e).getTabCount() != 0 /* == 1*/) {
p.add(new Chunk(tabs.get(currentTab)));
p.add(new Chunk((TabbedChunk) e));
++currentTab;
// } else { // wat doet een tabCount van groter dan 1? sla een tab over of count * tabWidth?
// int widthMultiplier = ((TabbedChunk) e).getTabCount();
}
}
else {
p.add(e);
}
}
}
/*
* (non-Javadoc)
*
* @see com.itextpdf.tool.xml.TagProcessor#isStackOwner()
*/
@Override
public boolean isStackOwner() {
return true;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy