Examples of org.apache.wicket.markup.html.IHeaderResponse

org.apache.wicket.markup.html.IHeaderResponse
Interface that is used to render header elements (usually javascript and CSS references). Implementation of this interface is responsible for filtering duplicate contributions (so that for example the same javascript is not loaded twice) during the same request. @author Matej Knopp

   * 
   * @return new header response
   */
  protected IHeaderResponse newHeaderResponse()
  {
    IHeaderResponse headerResponse = new HeaderResponse()
    {
      @Override
      protected Response getRealResponse()
      {
        return HtmlHeaderContainer.this.getResponse();

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      if (log.isDebugEnabled())
      {
        log.debug("renderHead: " + toString(false));
      }


      IHeaderResponse response = container.getHeaderResponse();


      // Allow component to contribute
      if (response.wasRendered(this) == false)
      {
        renderHead(response);
        response.markRendered(this);
      }


      // Than ask all behaviors
      for (IBehavior behavior : getBehaviors())
      {
        if (isBehaviorAccepted(behavior))
        {
          if (response.wasRendered(behavior) == false)
          {
            behavior.renderHead(response);
            response.markRendered(behavior);
          }
        }
      }
    }
  }

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    try
    {
      final StringResponse response = new StringResponse();
      getRequestCycle().setResponse(response);


      IHeaderResponse headerResponse = getHeaderResponse();
      if (!response.equals(headerResponse.getResponse()))
      {
        getRequestCycle().setResponse(headerResponse.getResponse());
      }


      // In any case, first render the header section directly associated
      // with the markup
      super.onComponentTagBody(markupStream, openTag);

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   * 
   * @return new header response
   */
  protected IHeaderResponse newHeaderResponse()
  {
    IHeaderResponse headerResponse = RequestContext.get().getHeaderResponse();
    if (headerResponse == null)
    {
      // no (portlet) headerResponse override, create a default one
      headerResponse = new HeaderResponse()
      {

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      if (log.isDebugEnabled())
      {
        log.debug("renderHead: " + toString(false));
      }


      IHeaderResponse response = container.getHeaderResponse();


      // Allow component to contribute
      if (response.wasRendered(this) == false)
      {
        // Let the component contribute something to the header
        renderHead(this, response);


        // Make sure the markup source strategy has been considered as well.
        getMarkupSourcingStrategy().renderHead(this, container);


        response.markRendered(this);
      }


      // Than ask all behaviors
      for (Behavior behavior : getBehaviors())
      {
        if (isBehaviorAccepted(behavior))
        {
          if (response.wasRendered(behavior) == false)
          {
            behavior.renderHead(this, response);
            response.markRendered(behavior);
          }
        }
      }
    }
  }

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      if (log.isDebugEnabled())
      {
        log.debug("renderHead: " + toString(false));
      }


      IHeaderResponse response = container.getHeaderResponse();


      // Allow component to contribute
      if (response.wasRendered(this) == false)
      {
        // Make sure the markup source strategy contributes to the header first
        // to be backward compatible. WICKET-3761
        getMarkupSourcingStrategy().renderHead(this, container);


        // Then let the component itself to contribute to the header
        renderHead(this, response);


        response.markRendered(this);
      }


      // Than ask all behaviors
      for (Behavior behavior : getBehaviors())
      {
        if (isBehaviorAccepted(behavior))
        {
          if (response.wasRendered(behavior) == false)
          {
            behavior.renderHead(this, response);
            response.markRendered(behavior);
          }
        }
      }
    }
  }

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    public void renderApplicationCss(final HtmlHeaderContainer container) {
        final String cssUrl = getApplicationCssUrl();
        if (cssUrl == null) {
            return;
        }
        final IHeaderResponse headerResponse = container.getHeaderResponse();
        headerResponse.renderCSSReference(cssUrl);
    }

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    public void renderApplicationCss(final HtmlHeaderContainer container) {
        final String cssUrl = getApplicationCssUrl();
        if (cssUrl == null) {
            return;
        }
        final IHeaderResponse headerResponse = container.getHeaderResponse();
        headerResponse.renderCSSReference(cssUrl);
    }

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    public void renderApplicationCss(final HtmlHeaderContainer container) {
        final String cssUrl = getApplicationCssUrl();
        if (cssUrl == null) {
            return;
        }
        final IHeaderResponse headerResponse = container.getHeaderResponse();
        headerResponse.renderCSSReference(cssUrl);
    }

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    public void renderApplicationCss(HtmlHeaderContainer container) {
        final String cssUrl = getApplicationCssUrl();
        if (cssUrl == null) {
            return;
        }
        final IHeaderResponse headerResponse = container.getHeaderResponse();
        headerResponse.renderCSSReference(cssUrl);
    }

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