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Styled XML parser is used by iText modules to parse HTML and XML
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 iText Group NV
Authors: iText Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 values = element.attributes().asList();
for (com.itextpdf.styledxmlparser.jsoup.nodes.Attribute attribute : values) {
if (Normalizer.lowerCase(attribute.getKey()).startsWith(keyPrefix))
return true;
}
return false;
}
@Override
public String toString() {
return MessageFormatUtil.format("[^{0}]", keyPrefix);
}
}
/**
* Evaluator for attribute name/value matching
*/
public static final class AttributeWithValue extends AttributeKeyPair {
public AttributeWithValue(String key, String value) {
super(key, value);
}
@Override
public boolean matches(Element root, Element element) {
return element.hasAttr(key) && value.equalsIgnoreCase(element.attr(key).trim());
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}={1}]", key, value);
}
}
/**
* Evaluator for attribute name != value matching
*/
public static final class AttributeWithValueNot extends AttributeKeyPair {
public AttributeWithValueNot(String key, String value) {
super(key, value);
}
@Override
public boolean matches(Element root, Element element) {
return !value.equalsIgnoreCase(element.attr(key));
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}!={1}]", key, value);
}
}
/**
* Evaluator for attribute name/value matching (value prefix)
*/
public static final class AttributeWithValueStarting extends AttributeKeyPair {
public AttributeWithValueStarting(String key, String value) {
super(key, value, false);
}
@Override
public boolean matches(Element root, Element element) {
return element.hasAttr(key) && Normalizer.lowerCase(element.attr(key)).startsWith(value); // value is lower case already
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}^={1}]", key, value);
}
}
/**
* Evaluator for attribute name/value matching (value ending)
*/
public static final class AttributeWithValueEnding extends AttributeKeyPair {
public AttributeWithValueEnding(String key, String value) {
super(key, value, false);
}
@Override
public boolean matches(Element root, Element element) {
return element.hasAttr(key) && Normalizer.lowerCase(element.attr(key)).endsWith(value); // value is lower case
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}$={1}]", key, value);
}
}
/**
* Evaluator for attribute name/value matching (value containing)
*/
public static final class AttributeWithValueContaining extends AttributeKeyPair {
public AttributeWithValueContaining(String key, String value) {
super(key, value);
}
@Override
public boolean matches(Element root, Element element) {
return element.hasAttr(key) && Normalizer.lowerCase(element.attr(key)).contains(value); // value is lower case
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}*={1}]", key, value);
}
}
/**
* Evaluator for attribute name/value matching (value regex matching)
*/
public static final class AttributeWithValueMatching extends Evaluator {
String key;
Pattern pattern;
public AttributeWithValueMatching(String key, Pattern pattern) {
this.key = Normalizer.normalize(key);
this.pattern = pattern;
}
@Override
public boolean matches(Element root, Element element) {
return element.hasAttr(key) && pattern.matcher(element.attr(key)).find();
}
@Override
public String toString() {
return MessageFormatUtil.format("[{0}~={1}]", key, pattern.toString());
}
}
/**
* Abstract evaluator for attribute name/value matching
*/
public abstract static class AttributeKeyPair extends Evaluator {
String key;
String value;
public AttributeKeyPair(String key, String value) {
this(key, value, true);
}
public AttributeKeyPair(String key, String value, boolean trimValue) {
Validate.notEmpty(key);
Validate.notEmpty(value);
this.key = Normalizer.normalize(key);
boolean isStringLiteral = value.startsWith("'") && value.endsWith("'")
|| value.startsWith("\"") && value.endsWith("\"");
if (isStringLiteral) {
value = value.substring(1, value.length()-1);
}
this.value = trimValue ? Normalizer.normalize(value) : Normalizer.normalize(value, isStringLiteral);
}
}
/**
* Evaluator for any / all element matching
*/
public static final class AllElements extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
return true;
}
@Override
public String toString() {
return "*";
}
}
/**
* Evaluator for matching by sibling index number (e {@literal <} idx)
*/
public static final class IndexLessThan extends IndexEvaluator {
public IndexLessThan(int index) {
super(index);
}
@Override
public boolean matches(Element root, Element element) {
return root != element && element.elementSiblingIndex() < index;
}
@Override
public String toString() {
return MessageFormatUtil.format(":lt({0})", index);
}
}
/**
* Evaluator for matching by sibling index number (e {@literal >} idx)
*/
public static final class IndexGreaterThan extends IndexEvaluator {
public IndexGreaterThan(int index) {
super(index);
}
@Override
public boolean matches(Element root, Element element) {
return element.elementSiblingIndex() > index;
}
@Override
public String toString() {
return MessageFormatUtil.format(":gt({0})", index);
}
}
/**
* Evaluator for matching by sibling index number (e = idx)
*/
public static final class IndexEquals extends IndexEvaluator {
public IndexEquals(int index) {
super(index);
}
@Override
public boolean matches(Element root, Element element) {
return element.elementSiblingIndex() == index;
}
@Override
public String toString() {
return MessageFormatUtil.format(":eq({0})", index);
}
}
/**
* Evaluator for matching the last sibling (css :last-child)
*/
public static final class IsLastChild extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
final Element p = (Element) element.parent();
return p != null && !(p instanceof Document) && element.elementSiblingIndex() == p.children().size()-1;
}
@Override
public String toString() {
return ":last-child";
}
}
public static final class IsFirstOfType extends IsNthOfType {
public IsFirstOfType() {
super(0,1);
}
@Override
public String toString() {
return ":first-of-type";
}
}
public static final class IsLastOfType extends IsNthLastOfType {
public IsLastOfType() {
super(0,1);
}
@Override
public String toString() {
return ":last-of-type";
}
}
public static abstract class CssNthEvaluator extends Evaluator {
protected final int a, b;
public CssNthEvaluator(int a, int b) {
this.a = a;
this.b = b;
}
public CssNthEvaluator(int b) {
this(0,b);
}
@Override
public boolean matches(Element root, Element element) {
final Element p = (Element) element.parent();
if (p == null || (p instanceof Document)) return false;
final int pos = calculatePosition(root, element);
if (a == 0) return pos == b;
return (pos-b)*a >= 0 && (pos-b)%a==0;
}
@Override
public String toString() {
if (a == 0)
return MessageFormatUtil.format(":{0}({1})",getPseudoClass(), b);
if (b == 0)
return MessageFormatUtil.format(":{0}({1}n)",getPseudoClass(), a);
return MessageFormatUtil.format(":{0}({1}n{2})", getPseudoClass(),a, b);
}
protected abstract String getPseudoClass();
protected abstract int calculatePosition(Element root, Element element);
}
/**
* css-compatible Evaluator for :eq (css :nth-child)
*
* @see IndexEquals
*/
public static final class IsNthChild extends CssNthEvaluator {
public IsNthChild(int a, int b) {
super(a,b);
}
protected int calculatePosition(Element root, Element element) {
return element.elementSiblingIndex()+1;
}
protected String getPseudoClass() {
return "nth-child";
}
}
/**
* css pseudo class :nth-last-child)
*
* @see IndexEquals
*/
public static final class IsNthLastChild extends CssNthEvaluator {
public IsNthLastChild(int a, int b) {
super(a,b);
}
@Override
protected int calculatePosition(Element root, Element element) {
Element parent = (Element) element.parent();
if (parent == null)
return 0;
return parent.children().size() - element.elementSiblingIndex();
}
@Override
protected String getPseudoClass() {
return "nth-last-child";
}
}
/**
* css pseudo class nth-of-type
*
*/
public static class IsNthOfType extends CssNthEvaluator {
public IsNthOfType(int a, int b) {
super(a,b);
}
protected int calculatePosition(Element root, Element element) {
int pos = 0;
Element parent = (Element) element.parent();
if (parent == null)
return 0;
Elements family = parent.children();
for (Element el : family) {
if (el.tag().equals(element.tag())) pos++;
if (el == element) break;
}
return pos;
}
@Override
protected String getPseudoClass() {
return "nth-of-type";
}
}
public static class IsNthLastOfType extends CssNthEvaluator {
public IsNthLastOfType(int a, int b) {
super(a, b);
}
@Override
protected int calculatePosition(Element root, Element element) {
int pos = 0;
Element parent = (Element) element.parent();
if (parent == null)
return 0;
Elements family = parent.children();
for (int i = element.elementSiblingIndex(); i < family.size(); i++) {
if (family.get(i).tag().equals(element.tag())) pos++;
}
return pos;
}
@Override
protected String getPseudoClass() {
return "nth-last-of-type";
}
}
/**
* Evaluator for matching the first sibling (css :first-child)
*/
public static final class IsFirstChild extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
final Element p = (Element) element.parent();
return p != null && !(p instanceof Document) && element.elementSiblingIndex() == 0;
}
@Override
public String toString() {
return ":first-child";
}
}
/**
* css3 pseudo-class :root
* @see :root selector
*
*/
public static final class IsRoot extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
final Element r = root instanceof Document?root.child(0):root;
return element == r;
}
@Override
public String toString() {
return ":root";
}
}
public static final class IsOnlyChild extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
final Element p = (Element) element.parent();
return p!=null && !(p instanceof Document) && element.siblingElements().isEmpty();
}
@Override
public String toString() {
return ":only-child";
}
}
public static final class IsOnlyOfType extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
final Element p = (Element) element.parent();
if (p==null || p instanceof Document) return false;
int pos = 0;
Elements family = p.children();
for (Element el : family) {
if (el.tag().equals(element.tag())) pos++;
}
return pos == 1;
}
@Override
public String toString() {
return ":only-of-type";
}
}
public static final class IsEmpty extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
List family = element.childNodes();
for (Node n : family) {
if (!(n instanceof Comment || n instanceof XmlDeclaration || n instanceof DocumentType)) return false;
}
return true;
}
@Override
public String toString() {
return ":empty";
}
}
/**
* Abstract evaluator for sibling index matching
*
* @author ant
*/
public abstract static class IndexEvaluator extends Evaluator {
int index;
public IndexEvaluator(int index) {
this.index = index;
}
}
/**
* Evaluator for matching Element (and its descendants) text
*/
public static final class ContainsText extends Evaluator {
private final String searchText;
public ContainsText(String searchText) {
this.searchText = Normalizer.lowerCase(searchText);
}
@Override
public boolean matches(Element root, Element element) {
return Normalizer.lowerCase(element.text()).contains(searchText);
}
@Override
public String toString() {
return MessageFormatUtil.format(":contains({0})", searchText);
}
}
/**
* Evaluator for matching Element (and its descendants) data
*/
public static final class ContainsData extends Evaluator {
private final String searchText;
public ContainsData(String searchText) {
this.searchText = Normalizer.lowerCase(searchText);
}
@Override
public boolean matches(Element root, Element element) {
return Normalizer.lowerCase(element.data()).contains(searchText);
}
@Override
public String toString() {
return MessageFormatUtil.format(":containsData({0})", searchText);
}
}
/**
* Evaluator for matching Element's own text
*/
public static final class ContainsOwnText extends Evaluator {
private final String searchText;
public ContainsOwnText(String searchText) {
this.searchText = Normalizer.lowerCase(searchText);
}
@Override
public boolean matches(Element root, Element element) {
return Normalizer.lowerCase(element.ownText()).contains(searchText);
}
@Override
public String toString() {
return MessageFormatUtil.format(":containsOwn({0})", searchText);
}
}
/**
* Evaluator for matching Element (and its descendants) text with regex
*/
public static final class Matches extends Evaluator {
private final Pattern pattern;
public Matches(Pattern pattern) {
this.pattern = pattern;
}
@Override
public boolean matches(Element root, Element element) {
Matcher m = pattern.matcher(element.text());
return m.find();
}
@Override
public String toString() {
return MessageFormatUtil.format(":matches({0})", pattern);
}
}
/**
* Evaluator for matching Element's own text with regex
*/
public static final class MatchesOwn extends Evaluator {
private final Pattern pattern;
public MatchesOwn(Pattern pattern) {
this.pattern = pattern;
}
@Override
public boolean matches(Element root, Element element) {
Matcher m = pattern.matcher(element.ownText());
return m.find();
}
@Override
public String toString() {
return MessageFormatUtil.format(":matchesOwn({0})", pattern);
}
}
public static final class MatchText extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
if (element instanceof PseudoTextElement)
return true;
List textNodes = element.textNodes();
for (TextNode textNode : textNodes) {
PseudoTextElement pel = new PseudoTextElement(
com.itextpdf.styledxmlparser.jsoup.parser.Tag.valueOf(element.tagName()), element.baseUri(), element.attributes());
textNode.replaceWith(pel);
pel.appendChild(textNode);
}
return false;
}
@Override
public String toString() {
return ":matchText";
}
}
}