org.apache.myfaces.trinidad.component.html

## Class HtmlHead

- java.lang.Object
- - javax.faces.component.UIComponent
  - - org.apache.myfaces.trinidad.component.UIXComponent
    - - org.apache.myfaces.trinidad.component.UIXComponentBase
      - - org.apache.myfaces.trinidad.component.html.HtmlHead

- All Implemented Interfaces:
    EventListener, javax.faces.component.PartialStateHolder, javax.faces.component.StateHolder, javax.faces.component.TransientStateHolder, javax.faces.event.ComponentSystemEventListener, javax.faces.event.FacesListener, javax.faces.event.SystemEventListenerHolder

      public class HtmlHead
      extends UIXComponentBase

  Tag for the HTML head element, including the document's title and any style sheets needed by th current look-and-feel. Page authors that use this do not need to use a styleSheet component, as it will automatically be included. The head component resets the Trinidad EL context when code re-enters the component via an invoke on component call or a visit tree call. See the org.apache.myfaces.trinidad.context.ComponentContextManager for more information.

  #### Events:

  Type | Phases | Description
  --- | --- | ---
  `org.apache.myfaces.trinidad.event.AttributeChangeEvent` | Invoke Application Apply Request Values | Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change event might include the width of a column that supported client-side resizing.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.myfaces.trinidad.component.UIXComponentBase

      `UIXComponentBase.ComponentSystemEventListenerWrapper`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `COMPONENT_FAMILY`
    `static String` | `COMPONENT_TYPE`
    `static PropertyKey` | `PARTIAL_TRIGGERS_KEY`
    `static PropertyKey` | `TITLE_KEY`
    `static FacesBean.Type` | `TYPE`

    - ### Fields inherited from class org.apache.myfaces.trinidad.component.UIXComponentBase

      `BINDING_KEY, ID_KEY, RENDERED_KEY, RENDERER_TYPE_KEY, TRANSIENT_KEY`

    - ### Fields inherited from class javax.faces.component.UIComponent

      `ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, CURRENT_COMPONENT, CURRENT_COMPOSITE_COMPONENT, FACETS_KEY, HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME, VIEW_LOCATION_KEY`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `` | `HtmlHead()` Construct an instance of the HtmlHead.
    `protected` | `HtmlHead(String rendererType)` Construct an instance of the HtmlHead.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected FacesBean.Type` | `getBeanType()`
    `String` | `getFamily()`
    `String[]` | `getPartialTriggers()` Gets the IDs of the components that should trigger a partial update.
    `String` | `getTitle()` Gets The title of the document.
    `void` | `setPartialTriggers(String[] partialTriggers)` Sets the IDs of the components that should trigger a partial update.
    `void` | `setTitle(String title)` Sets The title of the document.
    `protected void` | `setupVisitingContext(javax.faces.context.FacesContext facesContext)` Suspends any context changes before allowing invokeOnComponent or visitTree calls to continue, allowing components to undo any context changes during a re-entrant call.
    `protected void` | `tearDownVisitingContext(javax.faces.context.FacesContext facesContext)` Re-applies the suspended context changes.

    - ### Methods inherited from class org.apache.myfaces.trinidad.component.UIXComponentBase

      `adaptMethodBinding, addAttributeChange, addAttributeChangeListener, addClientBehavior, addComponentChange, addComponentChange, addComponentChangeFilter, addFacesListener, broadcast, broadcastToMethodBinding, broadcastToMethodExpression, clearCachedClientIds, clearInitialState, createFacesBean, decode, decodeChildren, decodeChildrenImpl, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributeChangeListener, getAttributeChangeListeners, getAttributes, getBooleanProperty, getChildCount, getChildren, getClientBehaviors, getClientId, getComponentChangeFilters, getContainerClientId, getDefaultEventName, getFacesBean, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacetNames, getFacets, getFacetsAndChildren, getId, getIntProperty, getLifecycleRenderer, getListenersForEventClass, getParent, getProperty, getPropertyKey, getRenderedFacetsAndChildren, getRenderer, getRendererType, getRendersChildren, getValueBinding, getValueExpression, initialStateMarked, invokeOnChildrenComponents, invokeOnComponent, invokeOnNamingContainerComponent, isRendered, isTransient, markInitialState, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeAttributeChangeListener, removeComponentChangeFilter, removeFacesListener, restoreState, satisfiesPartialTrigger, saveState, setAttributeChangeListener, setAttributeChangeListener, setBooleanProperty, setId, setIntProperty, setParent, setProperty, setRendered, setRendererType, setTransient, setupFlattenedChildrenContext, setupFlattenedContext, setValueBinding, setValueExpression, subscribeToEvent, tearDownFlattenedChildrenContext, tearDownFlattenedContext, toString, unsubscribeFromEvent, updateChildren, updateChildrenImpl, validateChildren, validateChildrenImpl`

    - ### Methods inherited from class org.apache.myfaces.trinidad.component.UIXComponent

      `addPartialTarget, broadcastInContext, clearCachedClientIds, defaultGetRenderedFacetsAndChildren, encodeFlattenedChild, encodeFlattenedChildren, getLogicalParent, getLogicalParent, getStateHelper, getStateHelper, isVisitable, partialEncodeVisit, processFlattenedChildren, processFlattenedChildren, processFlattenedChildren, processFlattenedChildren, setPartialTarget, setupChildrenEncodingContext, setupChildrenVisitingContext, setupEncodingContext, setUpEncodingContext, tearDownChildrenEncodingContext, tearDownChildrenVisitingContext, tearDownEncodingContext, visitAllChildren, visitChildren, visitChildren, visitTree, visitTree`

    - ### Methods inherited from class javax.faces.component.UIComponent

      `encodeAll, getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getNamingContainer, getResourceBundleMap, getTransientStateHelper, getTransientStateHelper, isCompositeComponent, isInView, popComponentFromEL, processEvent, pushComponentToEL, restoreTransientState, saveTransientState, setInView`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### TYPE

          public static final FacesBean.Type TYPE

    - #### TITLE_KEY

          public static final PropertyKey TITLE_KEY

    - #### PARTIAL_TRIGGERS_KEY

          public static final PropertyKey PARTIAL_TRIGGERS_KEY

    - #### COMPONENT_FAMILY

          public static final String COMPONENT_FAMILY

      See Also:
        Constant Field Values

    - #### COMPONENT_TYPE

          public static final String COMPONENT_TYPE

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### HtmlHead

          public HtmlHead()

      Construct an instance of the HtmlHead.

    - #### HtmlHead

          protected HtmlHead(String rendererType)

      Construct an instance of the HtmlHead.

  - ### Method Detail

    - #### setupVisitingContext

          protected void setupVisitingContext(javax.faces.context.FacesContext facesContext)

      Suspends any context changes before allowing invokeOnComponent or visitTree calls to continue, allowing components to undo any context changes during a re-entrant call.
      Overrides:
        `setupVisitingContext` in class `UIXComponent`
      Parameters:
        `facesContext` - the faces context
      See Also:
        `ComponentContextManager.suspend(FacesContext)`

    - #### tearDownVisitingContext

          protected void tearDownVisitingContext(javax.faces.context.FacesContext facesContext)

      Re-applies the suspended context changes.
      Overrides:
        `tearDownVisitingContext` in class `UIXComponent`
      Parameters:
        `facesContext` - the faces context
      See Also:
        `setupVisitingContext(FacesContext)`, `ComponentContextManager.resume(FacesContext, SuspendedContextChanges)`

    - #### getTitle

          public final String getTitle()

      Gets The title of the document. (This title doesn't have to match the title on any contained panelPage.)
      Returns:
        the new title value

    - #### setTitle

          public final void setTitle(String title)

      Sets The title of the document. (This title doesn't have to match the title on any contained panelPage.)
      Parameters:
        `title` - the new title value

    - #### getPartialTriggers

          public final String[] getPartialTriggers()

      Gets the IDs of the components that should trigger a partial update. This component will listen on the trigger components. If one of the trigger components receives an event that will cause it to update in some way, this component will request to be updated too.
      Returns:
        the new partialTriggers value

    - #### setPartialTriggers

          public final void setPartialTriggers(String[] partialTriggers)

      Sets the IDs of the components that should trigger a partial update. This component will listen on the trigger components. If one of the trigger components receives an event that will cause it to update in some way, this component will request to be updated too.
      Parameters:
        `partialTriggers` - the new partialTriggers value

    - #### getFamily

          public String getFamily()

      Specified by:
        `getFamily` in class `UIXComponentBase`

    - #### getBeanType

          protected FacesBean.Type getBeanType()

      Overrides:
        `getBeanType` in class `UIXComponentBase`

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