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com.lowagie.text.html.simpleparser.HTMLWorker Maven / Gradle / Ivy
/*
* Copyright 2004 Paulo Soares
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* Contributions by:
* Lubos Strapko
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.html.simpleparser;
import static com.lowagie.text.html.Markup.parseLength;
import com.lowagie.text.Chunk;
import com.lowagie.text.DocListener;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.ElementTags;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.FontProvider;
import com.lowagie.text.HeaderFooter;
import com.lowagie.text.Image;
import com.lowagie.text.ListItem;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.Rectangle;
import com.lowagie.text.TextElementArray;
import com.lowagie.text.html.HtmlTags;
import com.lowagie.text.html.Markup;
import com.lowagie.text.pdf.PdfPCell;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.draw.LineSeparator;
import com.lowagie.text.utils.NumberUtilities;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Base64;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import java.util.StringTokenizer;
public class HTMLWorker implements SimpleXMLDocHandler, DocListener {
public static final String tagsSupportedString = "ol ul li a pre font span br p div body table td th tr i b u sub sup em strong s strike"
+ " h1 h2 h3 h4 h5 h6 img hr";
public static final Map tagsSupported = new HashMap<>();
static {
StringTokenizer tok = new StringTokenizer(tagsSupportedString);
while (tok.hasMoreTokens())
tagsSupported.put(tok.nextToken(), null);
}
protected ArrayList objectList;
protected DocListener document;
private Paragraph currentParagraph;
private ChainedProperties cprops = new ChainedProperties();
private Stack stack = new Stack<>();
private boolean pendingTR = false;
private boolean pendingTD = false;
private boolean pendingLI = false;
private StyleSheet style = new StyleSheet();
private boolean isPRE = false;
private Stack tableState = new Stack<>();
private boolean skipText = false;
private Map interfaceProps;
private FactoryProperties factoryProperties = new FactoryProperties();
/**
* Creates a new instance of HTMLWorker
*
* @param document A class that implements DocListener
*/
public HTMLWorker(DocListener document) {
this.document = document;
}
public static ArrayList parseToList(Reader reader, StyleSheet style) throws IOException {
Map interfaceProps = null;
return parseToList(reader, style, interfaceProps);
}
/**
* @deprecated use {@link HTMLWorker#parseToList(Reader, StyleSheet, Map)} since 1.2.22
* @param reader the Reader
* @param style the StyleSheet
* @param interfaceProps the interface properties
* @return an ArrayList
* @throws IOException on error
*/
@Deprecated
@SuppressWarnings("unchecked")
public static ArrayList parseToList(Reader reader, StyleSheet style, HashMap interfaceProps)
throws IOException {
return parseToList(reader, style, (Map) interfaceProps);
}
public static ArrayList parseToList(Reader reader, StyleSheet style, Map interfaceProps)
throws IOException {
HTMLWorker worker = new HTMLWorker(null);
if (style != null) {
worker.style = style;
}
worker.document = worker;
worker.setInterfaceProps(interfaceProps);
worker.objectList = new ArrayList<>();
worker.parse(reader);
return worker.objectList;
}
public StyleSheet getStyleSheet() {
return style;
}
public void setStyleSheet(StyleSheet style) {
this.style = style;
}
public Map getInterfaceProps() {
return interfaceProps;
}
/**
*
* @deprecated use {@link HTMLWorker#setInterfaceProps(Map)} since 1.2.22
* @param interfaceProps the properties of the interface
*/
@SuppressWarnings("unchecked")
@Deprecated
public void setInterfaceProps(HashMap interfaceProps) {
setInterfaceProps((Map) interfaceProps);
}
public void setInterfaceProps(Map interfaceProps) {
this.interfaceProps = interfaceProps;
FontProvider ff = null;
if (interfaceProps != null)
ff = (FontProvider) interfaceProps.get("font_factory");
if (ff != null)
factoryProperties.setFontImp(ff);
}
public void parse(Reader reader) throws IOException {
SimpleXMLParser.parse(this, null, reader, true);
}
public void endDocument() {
try {
stack.forEach(o -> document.add((Element) o));
if (currentParagraph != null) {
document.add(currentParagraph);
}
currentParagraph = null;
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
public void startDocument() {
Map h = new HashMap<>();
style.applyStyle("body", h);
cprops.addToChain("body", h);
}
/**
* @deprecated use {@link HTMLWorker#startElement(String, Map)} } since 1.2.22
*/
@Deprecated
@SuppressWarnings("unchecked")
public void startElement(String tag, HashMap h) {
startElement(tag, (Map) h);
}
public void startElement(String tag, Map style) {
if (!tagsSupported.containsKey(tag)) {
return;
}
try {
this.style.applyStyle(tag, style);
String follow = FactoryProperties.followTags.get(tag);
if (follow != null) {
Map prop = new HashMap<>();
prop.put(follow, null);
cprops.addToChain(follow, prop);
return;
}
FactoryProperties.insertStyle(style, cprops);
if (tag.equals(HtmlTags.ANCHOR)) {
cprops.addToChain(tag, style);
if (currentParagraph == null) {
currentParagraph = new Paragraph();
}
stack.push(currentParagraph);
currentParagraph = new Paragraph();
return;
}
if (tag.equals(HtmlTags.NEWLINE)) {
if (currentParagraph == null) {
currentParagraph = new Paragraph();
}
Chunk chunk = factoryProperties.createChunk("\n", cprops);
currentParagraph.add(chunk);
return;
}
if (tag.equals(HtmlTags.HORIZONTALRULE)) {
// Attempting to duplicate the behavior seen on Firefox with
// http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_hr_test
// where an initial break is only inserted when the preceding element doesn't
// end with a break, but a trailing break is always inserted.
boolean addLeadingBreak = true;
if (currentParagraph == null) {
currentParagraph = new Paragraph();
addLeadingBreak = false;
}
if (addLeadingBreak) { // Not a new paragraph
int numChunks = currentParagraph.getChunks().size();
if (numChunks == 0 ||
((Chunk) (currentParagraph.getChunks().get(numChunks - 1))).getContent().endsWith("\n"))
addLeadingBreak = false;
}
String align = style.get("align");
int hrAlign = Element.ALIGN_CENTER;
if (align != null) {
if (align.equalsIgnoreCase("left")) {
hrAlign = Element.ALIGN_LEFT;
}
if (align.equalsIgnoreCase("right")) {
hrAlign = Element.ALIGN_RIGHT;
}
}
String width = style.get("width");
float hrWidth = 1;
if (width != null) {
float tmpWidth = parseLength(width, Markup.DEFAULT_FONT_SIZE);
if (tmpWidth > 0) hrWidth = tmpWidth;
if (!width.endsWith("%"))
hrWidth = 100; // Treat a pixel width as 100% for now.
}
String size = style.get("size");
float hrSize = 1;
if (size != null) {
float tmpSize = parseLength(size, Markup.DEFAULT_FONT_SIZE);
if (tmpSize > 0) {
hrSize = tmpSize;
}
}
if (addLeadingBreak) {
currentParagraph.add(Chunk.NEWLINE);
}
currentParagraph.add(new LineSeparator(hrSize, hrWidth, null, hrAlign, currentParagraph.getLeading() / 2));
currentParagraph.add(Chunk.NEWLINE);
return;
}
if (tag.equals(HtmlTags.CHUNK) || tag.equals(HtmlTags.SPAN)) {
cprops.addToChain(tag, style);
return;
}
if (tag.equals(HtmlTags.IMAGE)) {
String src = style.get(ElementTags.SRC);
if (src == null) {
return;
}
cprops.addToChain(tag, style);
Image img = null;
if (interfaceProps != null) {
ImageProvider ip = (ImageProvider) interfaceProps.get("img_provider");
if (ip != null) {
img = ip.getImage(src, (HashMap) style, cprops, document);
}
if (img == null) {
Map images = (HashMap) interfaceProps.get("img_static");
if (images != null) {
Image tim = (Image) images.get(src);
if (tim != null) {
img = Image.getInstance(tim);
}
} else {
if (!src.startsWith("http")) { // relative src references only
String baseUrl = (String) interfaceProps.get("img_baseurl");
if (baseUrl != null) {
src = baseUrl + src;
img = Image.getInstance(src);
}
}
}
}
}
if (img == null) {
if (src.startsWith("data:image/")) { // base64 embedded image
int pos = src.indexOf("base64,");
img = Image.getInstance(Base64.getDecoder().decode(src.substring(pos + 7)));
} else {
if (!src.startsWith("http")) {
String path = cprops.getOrDefault("image_path", "");
src = new File(path, src).getPath();
}
img = Image.getInstance(src);
}
}
String align = style.get("align");
String width = style.get("width");
String height = style.get("height");
cprops.findProperty("before")
.flatMap(NumberUtilities::parseFloat)
.ifPresent(img::setSpacingBefore);
cprops.findProperty("after")
.flatMap(NumberUtilities::parseFloat)
.ifPresent(img::setSpacingAfter);
float actualFontSize = parseLength(cprops.getProperty(ElementTags.SIZE), Markup.DEFAULT_FONT_SIZE);
if (actualFontSize <= 0f)
actualFontSize = Markup.DEFAULT_FONT_SIZE;
float widthInPoints = parseLength(width, actualFontSize);
float heightInPoints = parseLength(height, actualFontSize);
if (widthInPoints > 0 && heightInPoints > 0) {
img.scaleAbsolute(widthInPoints, heightInPoints);
} else if (widthInPoints > 0) {
heightInPoints = img.getHeight() * widthInPoints
/ img.getWidth();
img.scaleAbsolute(widthInPoints, heightInPoints);
} else if (heightInPoints > 0) {
widthInPoints = img.getWidth() * heightInPoints
/ img.getHeight();
img.scaleAbsolute(widthInPoints, heightInPoints);
}
img.setWidthPercentage(0);
if (align != null) {
endElement("p");
int ralign = Image.MIDDLE;
if (align.equalsIgnoreCase("left"))
ralign = Image.LEFT;
else if (align.equalsIgnoreCase("right"))
ralign = Image.RIGHT;
img.setAlignment(ralign);
Img i = null;
boolean skip = false;
if (interfaceProps != null) {
i = (Img) interfaceProps.get("img_interface");
if (i != null)
skip = i.process(img, (HashMap) style, cprops, document);
}
if (!skip)
document.add(img);
cprops.removeChain(tag);
} else {
cprops.removeChain(tag);
if (currentParagraph == null) {
currentParagraph = FactoryProperties
.createParagraph(cprops);
}
currentParagraph.add(new Chunk(img, 0, 0));
}
return;
}
endElement("p");
if (tag.equals("h1") || tag.equals("h2") || tag.equals("h3")
|| tag.equals("h4") || tag.equals("h5") || tag.equals("h6")) {
if (!style.containsKey(ElementTags.SIZE)) {
int v = 7 - Integer.parseInt(tag.substring(1));
style.put(ElementTags.SIZE, Integer.toString(v));
}
cprops.addToChain(tag, style);
return;
}
if (tag.equals(HtmlTags.UNORDEREDLIST)) {
if (pendingLI)
endElement(HtmlTags.LISTITEM);
skipText = true;
cprops.addToChain(tag, style);
com.lowagie.text.List list = new com.lowagie.text.List(false);
try {
list.setIndentationLeft(Float.parseFloat(cprops.getProperty("indent")));
} catch (Exception e) {
list.setAutoindent(true);
}
list.setListSymbol("\u2022");
stack.push(list);
return;
}
if (tag.equals(HtmlTags.ORDEREDLIST)) {
if (pendingLI)
endElement(HtmlTags.LISTITEM);
skipText = true;
cprops.addToChain(tag, style);
com.lowagie.text.List list = new com.lowagie.text.List(true);
try {
list.setIndentationLeft(Float.parseFloat(cprops.getProperty("indent")));
} catch (Exception e) {
list.setAutoindent(true);
}
stack.push(list);
return;
}
if (tag.equals(HtmlTags.LISTITEM)) {
if (pendingLI)
endElement(HtmlTags.LISTITEM);
skipText = false;
pendingLI = true;
cprops.addToChain(tag, style);
ListItem item = FactoryProperties.createListItem(cprops);
stack.push(item);
return;
}
if (tag.equals(HtmlTags.DIV) || tag.equals(HtmlTags.BODY) || tag.equals("p")) {
cprops.addToChain(tag, style);
return;
}
if (tag.equals(HtmlTags.PRE)) {
if (!style.containsKey(ElementTags.FACE)) {
style.put(ElementTags.FACE, "Courier");
}
cprops.addToChain(tag, style);
isPRE = true;
return;
}
if (tag.equals("tr")) {
if (pendingTR)
endElement("tr");
skipText = true;
pendingTR = true;
cprops.addToChain("tr", style);
return;
}
if (tag.equals("td") || tag.equals("th")) {
if (pendingTD)
endElement(tag);
skipText = false;
pendingTD = true;
cprops.addToChain("td", style);
stack.push(new IncCell(tag, cprops));
return;
}
if (tag.equals("table")) {
cprops.addToChain("table", style);
IncTable table = new IncTable(style);
stack.push(table);
tableState.push(new boolean[]{pendingTR, pendingTD});
pendingTR = pendingTD = false;
skipText = true;
return;
}
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
public void endElement(String tag) {
if (!tagsSupported.containsKey(tag))
return;
try {
String follow = FactoryProperties.followTags.get(tag);
if (follow != null) {
cprops.removeChain(follow);
return;
}
if (tag.equals("font") || tag.equals("span")) {
cprops.removeChain(tag);
return;
}
if (tag.equals("a")) {
if (currentParagraph == null) {
currentParagraph = new Paragraph();
}
boolean skip = false;
if (interfaceProps != null) {
ALink i = (ALink) interfaceProps.get("alink_interface");
if (i != null)
skip = i.process(currentParagraph, cprops);
}
if (!skip) {
cprops.findProperty("href").ifPresent(href -> {
List chunks = currentParagraph.getChunks();
for (Element chunk : chunks) {
Chunk ck = (Chunk) chunk;
ck.setAnchor(href);
}
});
}
Paragraph tmp = (Paragraph) stack.pop();
Phrase tmp2 = new Phrase();
tmp2.add(currentParagraph);
tmp.add(tmp2);
currentParagraph = tmp;
cprops.removeChain("a");
return;
}
if (tag.equals("br")) {
return;
}
if (currentParagraph != null) {
if (stack.empty())
document.add(currentParagraph);
else {
Object obj = stack.pop();
if (obj instanceof TextElementArray) {
TextElementArray current = (TextElementArray) obj;
current.add(currentParagraph);
}
stack.push(obj);
}
}
currentParagraph = null;
if (tag.equals(HtmlTags.UNORDEREDLIST)
|| tag.equals(HtmlTags.ORDEREDLIST)) {
if (pendingLI)
endElement(HtmlTags.LISTITEM);
skipText = false;
cprops.removeChain(tag);
if (stack.empty())
return;
Object obj = stack.pop();
if (!(obj instanceof com.lowagie.text.List)) {
stack.push(obj);
return;
}
if (stack.empty()) {
document.add((Element) obj);
} else {
Object peek = stack.peek();
if (peek instanceof com.lowagie.text.List) {
((com.lowagie.text.List) peek).add((com.lowagie.text.List) obj);
} else {
((TextElementArray) peek).add((Element) obj);
}
}
return;
}
if (tag.equals(HtmlTags.LISTITEM)) {
pendingLI = false;
skipText = true;
cprops.removeChain(tag);
if (stack.empty())
return;
Object obj = stack.pop();
if (!(obj instanceof ListItem)) {
stack.push(obj);
return;
}
if (stack.empty()) {
document.add((Element) obj);
return;
}
Object list = stack.pop();
if (!(list instanceof com.lowagie.text.List)) {
stack.push(list);
return;
}
ListItem item = (ListItem) obj;
((com.lowagie.text.List) list).add(item);
List cks = item.getChunks();
if (!cks.isEmpty())
item.getListSymbol()
.setFont(((Chunk) cks.get(0)).getFont());
stack.push(list);
return;
}
if (tag.equals("div") || tag.equals("body")) {
cprops.removeChain(tag);
return;
}
if (tag.equals(HtmlTags.PRE)) {
cprops.removeChain(tag);
isPRE = false;
return;
}
if (tag.equals("p")) {
cprops.removeChain(tag);
return;
}
if (tag.equals("h1") || tag.equals("h2") || tag.equals("h3")
|| tag.equals("h4") || tag.equals("h5") || tag.equals("h6")) {
cprops.removeChain(tag);
return;
}
if (tag.equals("table")) {
if (pendingTR)
endElement("tr");
cprops.removeChain("table");
IncTable table = (IncTable) stack.pop();
PdfPTable tb = table.buildTable();
tb.setSplitRows(true);
if (stack.empty())
document.add(tb);
else
((TextElementArray) stack.peek()).add(tb);
boolean[] state = (boolean[]) tableState.pop();
pendingTR = state[0];
pendingTD = state[1];
skipText = false;
return;
}
if (tag.equals("tr")) {
if (pendingTD)
endElement("td");
pendingTR = false;
cprops.removeChain("tr");
List cells = new ArrayList<>();
IncTable table;
while (true) {
Object obj = stack.pop();
if (obj instanceof IncCell) {
cells.add(((IncCell) obj).getCell());
}
if (obj instanceof IncTable) {
table = (IncTable) obj;
break;
}
}
table.addCols(cells);
table.endRow();
stack.push(table);
skipText = true;
return;
}
if (tag.equals("td") || tag.equals("th")) {
pendingTD = false;
cprops.removeChain("td");
skipText = true;
return;
}
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
public void text(String str) {
if (skipText)
return;
String content = str;
if (isPRE) {
if (currentParagraph == null) {
currentParagraph = FactoryProperties.createParagraph(cprops);
}
Chunk chunk = factoryProperties.createChunk(content, cprops);
currentParagraph.add(chunk);
return;
}
if (content.trim().length() == 0 && content.indexOf(' ') < 0) {
return;
}
StringBuilder buf = new StringBuilder();
int len = content.length();
char character;
boolean newline = false;
for (int i = 0; i < len; i++) {
switch (character = content.charAt(i)) {
case ' ':
if (!newline) {
buf.append(character);
}
break;
case '\n':
if (i > 0) {
newline = true;
buf.append(' ');
}
break;
case '\r':
break;
case '\t':
break;
default:
newline = false;
buf.append(character);
}
}
if (currentParagraph == null) {
currentParagraph = FactoryProperties.createParagraph(cprops);
}
Chunk chunk = factoryProperties.createChunk(buf.toString(), cprops);
currentParagraph.add(chunk);
}
public boolean add(Element element) throws DocumentException {
objectList.add(element);
return true;
}
public void clearTextWrap() throws DocumentException {
}
public void close() {
}
public boolean newPage() {
return true;
}
public void open() {
}
public void resetFooter() {
}
public void resetHeader() {
}
public void resetPageCount() {
}
public void setFooter(HeaderFooter footer) {
}
public void setHeader(HeaderFooter header) {
}
public boolean setMarginMirroring(boolean marginMirroring) {
return false;
}
/**
* @see com.lowagie.text.DocListener#setMarginMirroring(boolean)
* @since 2.1.6
*/
public boolean setMarginMirroringTopBottom(boolean marginMirroring) {
return false;
}
public boolean setMargins(float marginLeft, float marginRight,
float marginTop, float marginBottom) {
return true;
}
public void setPageCount(int pageN) {
}
public boolean setPageSize(Rectangle pageSize) {
return true;
}
}
