Package org.htmlcleaner
Class TagInfo
- java.lang.Object
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- org.htmlcleaner.TagInfo
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public class TagInfo extends Object
Class contains information about single HTML tag.
It also contains rules for tag balancing. For each tag, list of dependent tags may be defined. There are several kinds of dependencies used to reorder tags:- fatal tags - required outer tag - the tag will be ignored during parsing (will be skipped) if this fatal tag is missing. For example, most web browsers ignore elements TD, TR, TBODY if they are not in the context of TABLE tag.
- required enclosing tags - if there is no such, it is implicitly created. For example if TD is out of TR - open TR is created before.
- forbidden tags - it is not allowed to occur inside - for example FORM cannot be inside other FORM and it will be ignored during cleanup.
- allowed children tags - for example TR allows TD and TH. If there are some dependent allowed tags defined then cleaner ignores other tags, treating them as not allowed, unless they are in some other relationship with this tag.
- preferred child tag - where a child tag doesn't match, but we want to by default insert an intervening tag rather than just move it outside. For example, LI in UL, TD in TR.
- higher level tags - for example for TR higher tags are THEAD, TBODY, TFOOT.
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tags that must be closed and copied - for example, in
<a href="#"><div>....
tag A must be closed before DIV but copied again inside DIV. -
tags that must be closed before closing this tag and copied again after -
for example, in
<i><b>at</i> first</b> text
tag B must be closed before closing I, but it must be copied again after resulting finally in sequence:<i><b>at</b></i><b> first</b> text
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Tag TR for instance (table row) may define the following dependencies:
- fatal tag is
table
- required enclosing tag is
tbody
- allowed children tags are
td,th
- higher level tags are
thead,tfoot
- tags that muste be closed before are
tr,td,th,caption,colgroup
tr
must be in context oftable
, otherwise it will be ignored,tr
may can be directly insidetbody
,tfoot
andthead
, otherwisetbody
will be implicitly created in front of it.tr
can containtd
andth
, all other tags and content will be pushed out of current limiting context, in the case of html tables, in front of enclosingtable
tag.- if previous open tag is one of
tr
,caption
orcolgroup
, it will be implicitly closed.
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Method Summary
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Constructor Detail
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TagInfo
public TagInfo(String name, ContentType contentType, BelongsTo belongsTo, boolean deprecated, boolean unique, boolean ignorePermitted, CloseTag closeTag, Display display)
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Method Detail
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defineFatalTags
public void defineFatalTags(String commaSeparatedListOfTags)
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defineRequiredEnclosingTags
public void defineRequiredEnclosingTags(String commaSeparatedListOfTags)
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defineForbiddenTags
public void defineForbiddenTags(String commaSeparatedListOfTags)
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defineAllowedChildrenTags
public void defineAllowedChildrenTags(String commaSeparatedListOfTags)
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defineHigherLevelTags
public void defineHigherLevelTags(String commaSeparatedListOfTags)
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defineCloseBeforeCopyInsideTags
public void defineCloseBeforeCopyInsideTags(String commaSeparatedListOfTags)
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defineCloseInsideCopyAfterTags
public void defineCloseInsideCopyAfterTags(String commaSeparatedListOfTags)
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defineCloseBeforeTags
public void defineCloseBeforeTags(String commaSeparatedListOfTags)
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getDisplay
public Display getDisplay()
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setDisplay
public void setDisplay(Display display)
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getName
public String getName()
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setName
public void setName(String name)
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getContentType
public ContentType getContentType()
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setRequiredParent
public void setRequiredParent(String requiredParent)
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getBelongsTo
public BelongsTo getBelongsTo()
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setBelongsTo
public void setBelongsTo(BelongsTo belongsTo)
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isFatalTag
public boolean isFatalTag(String tag)
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setFatalTag
public void setFatalTag(String fatalTag)
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isDeprecated
public boolean isDeprecated()
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setDeprecated
public void setDeprecated(boolean deprecated)
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isUnique
public boolean isUnique()
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setUnique
public void setUnique(boolean unique)
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isIgnorePermitted
public boolean isIgnorePermitted()
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isEmptyTag
public boolean isEmptyTag()
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setIgnorePermitted
public void setIgnorePermitted(boolean ignorePermitted)
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isMinimizedTagPermitted
public boolean isMinimizedTagPermitted()
- Returns:
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getPreferredChildTag
public String getPreferredChildTag()
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setPreferredChildTag
public void setPreferredChildTag(String preferredChildTag)
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