jodd.lagarto.dom

Class LagartoDOMBuilderTagVisitor

java.lang.Object

jodd.lagarto.dom.LagartoDOMBuilderTagVisitor

All Implemented Interfaces:

TagVisitor

public class LagartoDOMBuilderTagVisitor
extends java.lang.Object
implements TagVisitor

Lagarto tag visitor that builds DOM tree. It (still) does not build the tree fully by the HTML specs, however, it works good enough for any sane HTML out there. In the default mode, the tree builder does not change the order of the elements, so the returned tree reflects the input. So if the input contains crazy stuff, the tree will be weird, too :)

In experimental html-plus mode we do have some further HTML5 rules implemented, that according to some rules may change the node position. However, not all rules are implemented (yet) and this is still just experimental.

Field Summary

Fields

Modifier and Type	Field and Description
protected LagartoDOMBuilder	domBuilder
protected boolean	enabled While enabled, nodes will be added to the DOM tree.
protected HtmlCCommentExpressionMatcher	htmlCCommentExpressionMatcher
protected HtmlVoidRules	htmlVoidRules
protected HtmlImplicitClosingRules	implRules
protected Node	parentNode
protected Document	rootNode

Constructor Summary

Constructors

Constructor and Description
LagartoDOMBuilderTagVisitor(LagartoDOMBuilder domBuilder)

Method Summary

Methods

Modifier and Type	Method and Description
void	cdata(java.lang.CharSequence cdata) Invoked on CDATA sequence.
void	comment(java.lang.CharSequence comment) Invoked on comment.
void	condComment(java.lang.CharSequence expression, boolean isStartingTag, boolean isHidden, boolean isHiddenEndTag) Invoked on IE conditional comment.
protected Element	createElementNode(Tag tag) Creates new element with correct configuration.
void	doctype(Doctype doctype) Invoked on DOCTYPE directive.
void	end() Finishes the tree building.
void	error(java.lang.String message) Warn about parsing error.
protected Node	findMatchingParentOpenTag(java.lang.String tagName) Finds matching parent open tag or null if not found.
protected void	fixUnclosedTagsUpToMatchingParent(Tag tag, Node matchingParent) Fixes all unclosed tags up to matching parent.
Document	getDocument() Returns root document node of parsed DOM tree.
protected void	removeLastChildNodeIfEmptyText(Node parentNode, boolean closedTag) Removes last child node if contains just empty text.
void	script(Tag tag, java.lang.CharSequence body) Invoked on script tag.
void	start() Starts with DOM building.
void	tag(Tag tag) Visits tags.
void	text(java.lang.CharSequence text) Invoked on text i.e. anything other than a tag.
void	xml(java.lang.CharSequence version, java.lang.CharSequence encoding, java.lang.CharSequence standalone) Invoked on xml declaration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

domBuilder

protected final LagartoDOMBuilder domBuilder

implRules

protected final HtmlImplicitClosingRules implRules

htmlVoidRules

protected HtmlVoidRules htmlVoidRules

rootNode

protected Document rootNode

parentNode

protected Node parentNode

enabled

protected boolean enabled

While enabled, nodes will be added to the DOM tree. Useful for skipping some tags.

htmlCCommentExpressionMatcher

protected HtmlCCommentExpressionMatcher htmlCCommentExpressionMatcher

Constructor Detail

LagartoDOMBuilderTagVisitor

public LagartoDOMBuilderTagVisitor(LagartoDOMBuilder domBuilder)

Method Detail

getDocument

public Document getDocument()

Returns root document node of parsed DOM tree.

start

public void start()

Starts with DOM building. Creates root Document node.

Specified by:

start in interface TagVisitor

end

public void end()

Finishes the tree building. Closes unclosed tags.

Specified by:

end in interface TagVisitor

createElementNode

protected Element createElementNode(Tag tag)

Creates new element with correct configuration.

tag

public void tag(Tag tag)

Visits tags.

Specified by:

tag in interface TagVisitor

removeLastChildNodeIfEmptyText

protected void removeLastChildNodeIfEmptyText(Node parentNode,
                                  boolean closedTag)

Removes last child node if contains just empty text.

findMatchingParentOpenTag

protected Node findMatchingParentOpenTag(java.lang.String tagName)

Finds matching parent open tag or null if not found.

fixUnclosedTagsUpToMatchingParent

protected void fixUnclosedTagsUpToMatchingParent(Tag tag,
                                     Node matchingParent)

Fixes all unclosed tags up to matching parent. Missing end tags will be added just before parent tag is closed, making the whole inner content as its tag body.

Tags that can be closed implicitly are checked and closed.

There is optional check for detecting orphan tags inside the table or lists. If set, tags can be closed beyond the border of the table and the list and it is reported as orphan tag.

This is just a generic solutions, closest to the rules.

script

public void script(Tag tag,
          java.lang.CharSequence body)

Description copied from interface: TagVisitor

Invoked on script tag.

Specified by:

script in interface TagVisitor

comment

public void comment(java.lang.CharSequence comment)

Description copied from interface: TagVisitor

Invoked on comment.

Specified by:

comment in interface TagVisitor

text

public void text(java.lang.CharSequence text)

Description copied from interface: TagVisitor

Invoked on text i.e. anything other than a tag.

Specified by:

text in interface TagVisitor

cdata

public void cdata(java.lang.CharSequence cdata)

Description copied from interface: TagVisitor

Invoked on CDATA sequence.

Specified by:

cdata in interface TagVisitor

xml

public void xml(java.lang.CharSequence version,
       java.lang.CharSequence encoding,
       java.lang.CharSequence standalone)

Description copied from interface: TagVisitor

Invoked on xml declaration.

Specified by:

xml in interface TagVisitor

doctype

public void doctype(Doctype doctype)

Description copied from interface: TagVisitor

Invoked on DOCTYPE directive.

Specified by:

doctype in interface TagVisitor

condComment

public void condComment(java.lang.CharSequence expression,
               boolean isStartingTag,
               boolean isHidden,
               boolean isHiddenEndTag)

Description copied from interface: TagVisitor

Invoked on IE conditional comment. By default, the parser does not process the conditional comments, so you need to turn them on. Once conditional comments are enabled, this even will be fired.

The following conditional comments are recognized: <!--[if IE 6]>one<![endif]--> <!--[if IE 6]><!-->two<!---<![endif]--> <!--[if IE 6]>three<!--xx<![endif]--> <![if IE 6]>four<![endif]>

Specified by:

condComment in interface TagVisitor

error

public void error(java.lang.String message)

Description copied from interface: TagVisitor

Warn about parsing error. Usually, parser will try to continue.

Specified by:

error in interface TagVisitor

Parameters:

message - parsing error message