HtmlHeaderSectionHandler (Wicket Core 9.0.0-SNAPSHOT API)

java.lang.Object
- org.apache.wicket.markup.parser.AbstractMarkupFilter
- - org.apache.wicket.markup.parser.filter.HtmlHeaderSectionHandler

All Implemented Interfaces:

IMarkupFilter
```
public final class HtmlHeaderSectionHandler
extends AbstractMarkupFilter
```
This is a markup inline filter.
It assumes that WicketTagIdentifier has been called first and search for a <head> tag (note: not wicket:head). Provided the markup contains a <body> tag it will automatically prepend a <head> tag if missing.

Additionally this filter handles <wicket:header-items/>. If there is such tag then it is marked as the one that should be used as HtmlHeaderContainer, by setting its id to "_header_".

Note: This handler is only relevant for Pages (see MarkupParser.newFilterChain())

Author:

Juergen Donnerstag

See Also:

MarkupParser, HtmlHeaderResolver

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`BODY`
`static java.lang.String`	`HEAD`
`static java.lang.String`	`HEADER_ID`	The automatically assigned wicket:id to >head< tag
`static java.lang.String`	`HEADER_ID_ITEM`

Fields inherited from class org.apache.wicket.markup.parser.AbstractMarkupFilter
REQUEST_COUNTER_KEY

Constructor Summary

Constructors
Constructor Description

HtmlHeaderSectionHandler(Markup markup)
Construct.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

protected MarkupElement onComponentTag(ComponentTag tag)
Invoked when a ComponentTag was found.
- Methods inherited from class org.apache.wicket.markup.parser.AbstractMarkupFilter
  getMarkupResourceStream, getNextFilter, getRequestUniqueId, getWicketNamespace, getWicketNamespace, nextElement, onSpecialTag, postProcess, setNextFilter
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - BODY
```
public static final java.lang.String BODY
```
    See Also:
    
    Constant Field Values
  - HEAD
```
public static final java.lang.String HEAD
```
    See Also:
    
    Constant Field Values
  - HEADER_ID
```
public static final java.lang.String HEADER_ID
```
    The automatically assigned wicket:id to >head< tag
    
    See Also:
    
    Constant Field Values
  - HEADER_ID_ITEM
```
public static final java.lang.String HEADER_ID_ITEM
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HtmlHeaderSectionHandler
```
public HtmlHeaderSectionHandler(Markup markup)
```
    Construct.
    
    Parameters:
    
    markup - The Markup object being filled while reading the markup resource
- Method Detail
  - onComponentTag
```
protected final MarkupElement onComponentTag(ComponentTag tag)
                                      throws java.text.ParseException
```
    Description copied from class: AbstractMarkupFilter
    
    Invoked when a ComponentTag was found.
    By default this method is also called for WicketTags.
    
    Specified by:
    
    onComponentTag in class AbstractMarkupFilter
    
    Returns:
    
    Usually the same as the tag attribute
    
    Throws:
    
    java.text.ParseException