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// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.csselly.selector;
import java.util.List;
import jodd.lagarto.dom.Node;
/**
* Pseudo classes.
*/
public abstract class PseudoClass {
// ---------------------------------------------------------------- STANDARD PSEUDO CLASSES
/**
* Same as :nth-child(1). Represents an element that is the first child of some other element.
*/
public static class FIRST_CHILD extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getSiblingElementIndex() == 0;
}
}
/**
* Same as :nth-last-child(1). Represents an element that is the last child of some other element.
*/
public static class LAST_CHILD extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getSiblingElementIndex() == node.getParentNode().getChildElementsCount() - 1;
}
}
/**
* Represents an element that has a parent element and whose parent element has no other element children.
* Same as :first-child:last-child or :nth-child(1):nth-last-child(1), but with
* a lower specificity.
*/
public static class ONLY_CHILD extends PseudoClass {
@Override
public boolean match(Node node) {
return (node.getSiblingElementIndex() == 0) && (node.getParentNode().getChildElementsCount() == 1);
}
}
/**
* Same as :nth-of-type(1). Represents an element that is the first sibling of its
* type in the list of children of its parent element.
*/
public static class FIRST_OF_TYPE extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getSiblingNameIndex() == 0;
}
}
/**
* Same as :nth-last-of-type(1). Represents an element that is the last sibling of its
* type in the list of children of its parent element.
*/
public static class LAST_OF_TYPE extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getNextSiblingName() == null;
}
}
/**
* Represents an element that is the root of the document.
* In HTML 4, this is always the HTML element.
*/
public static class ROOT extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getParentNode().getNodeType() == Node.NodeType.DOCUMENT;
}
}
/**
* Represents an element that has no children at all.
*/
public static class EMPTY extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getChildNodesCount() == 0;
}
}
/**
* Represents an element that has a parent element and whose parent
* element has no other element children with the same expanded element
* name. Same as :first-of-type:last-of-type or
* :nth-of-type(1):nth-last-of-type(1), but with a lower specificity.
*/
public static class ONLY_OF_TYPE extends PseudoClass {
@Override
public boolean match(Node node) {
return (node.getSiblingNameIndex() == 0) && (node.getNextSiblingName() == null);
}
}
// ---------------------------------------------------------------- EXTENDED PSEUDO CLASSES
/**
* Selects the first matched element.
*/
public static class FIRST extends PseudoClass {
@Override
public boolean match(Node node) {
return true;
}
@Override
public boolean match(List currentResults, Node node, int index) {
if (currentResults.isEmpty()) {
return false;
}
Node firstNode = currentResults.get(0); // getFirst();
if (firstNode == null) {
return false;
}
return firstNode == node;
}
}
/**
* Selects the last matched element. Note that :last selects
* a single element by filtering the current collection and matching the
* last element within it.
*/
public static class LAST extends PseudoClass {
@Override
public boolean match(Node node) {
return true;
}
@Override
public boolean match(List currentResults, Node node, int index) {
int size = currentResults.size();
if (size == 0) {
return false;
}
Node lastNode = currentResults.get(size - 1); // getLast();
if (lastNode == null) {
return false;
}
return lastNode == node;
}
}
/**
* Selects all button elements and elements of type button.
*/
public static class BUTTON extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("button");
}
}
/**
* Selects all elements of type checkbox.
*/
public static class CHECKBOX extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("checkbox");
}
}
/**
* Selects all elements of type file.
*/
public static class FILE extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("file");
}
}
/**
* Selects all elements that are headers, like h1, h2, h3 and so on.
*/
public static class HEADER extends PseudoClass {
@Override
public boolean match(Node node) {
String name = node.getNodeName();
if (name == null) {
return false;
}
if (name.length() != 2) {
return false;
}
char c1 = name.charAt(0);
if (c1 != 'h' && c1 != 'H') {
return false;
}
int c2 = name.charAt(1) - '0';
return c2 >= 1 && c2 <= 6;
}
}
/**
* Selects all elements of type image.
*/
public static class IMAGE extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("image");
}
}
/**
* Selects all input, textarea, select and button elements.
*/
public static class INPUT extends PseudoClass {
@Override
public boolean match(Node node) {
String tagName = node.getNodeName();
if (tagName == null) {
return false;
}
if (tagName.equals("button")) {
return true;
}
if (tagName.equals("input")) {
return true;
}
if (tagName.equals("select")) {
return true;
}
//noinspection RedundantIfStatement
if (tagName.equals("textarea")) {
return true;
}
return false;
}
}
/**
* Select all elements that are the parent of another element, including text nodes.
* This is the inverse of :empty.
*/
public static class PARENT extends PseudoClass {
@Override
public boolean match(Node node) {
return node.getChildNodesCount() != 0;
}
}
/**
* Selects all elements of type password.
*/
public static class PASSWORD extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("password");
}
}
/**
* Selects all elements of type radio.
*/
public static class RADIO extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("radio");
}
}
/**
* Selects all elements of type reset.
*/
public static class RESET extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("reset");
}
}
/**
* Selects all elements that are selected.
*/
public static class SELECTED extends PseudoClass {
@Override
public boolean match(Node node) {
return node.hasAttribute("selected");
}
}
/**
* Selects all elements that are checked.
*/
public static class CHECKED extends PseudoClass {
@Override
public boolean match(Node node) {
return node.hasAttribute("checked");
}
}
/**
* Selects all elements of type submit.
*/
public static class SUBMIT extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("submit");
}
}
/**
* Selects all elements of type text.
*/
public static class TEXT extends PseudoClass {
@Override
public boolean match(Node node) {
String type = node.getAttribute("type");
if (type == null) {
return false;
}
return type.equals("text");
}
}
/**
* Selects even elements, zero-indexed.
*/
public static class EVEN extends PseudoClass {
@Override
public boolean match(Node node) {
return true;
}
@Override
public boolean match(List currentResults, Node node, int index) {
return index % 2 == 0;
}
}
/**
* Selects odd elements, zero-indexed.
*/
public static class ODD extends PseudoClass {
@Override
public boolean match(Node node) {
return true;
}
@Override
public boolean match(List currentResults, Node node, int index) {
return index % 2 != 0;
}
}
// ---------------------------------------------------------------- interface
/**
* Returns true if node matches the pseudoclass.
*/
public abstract boolean match(Node node);
/**
* Returns true if node matches the pseudoclass within current results.
*/
public boolean match(List currentResults, Node node, int index) {
return true;
}
/**
* Returns pseudo-class name from simple class name.
*/
public String getPseudoClassName() {
String name = getClass().getSimpleName().toLowerCase();
name = name.replace('_', '-');
return name;
}
}