Module org.apache.wicket.core
Package org.apache.wicket.markup.head

Class CssHeaderItem

    • Constructor Detail

      • CssHeaderItem

        public CssHeaderItem()

    • Method Detail

      • getId

        public String getId()
        Returns:
        an optional markup id for the <link> HTML element that will be rendered for this header item

      • setId

        public CssHeaderItem setId​(String markupId)
        Parameters:
        markupId - an optional markup id for this header item
        Returns:
        this object, for method chaining

      • forReference

        public static CssReferenceHeaderItem forReference​(ResourceReference reference,
                                                  org.apache.wicket.request.mapper.parameter.PageParameters pageParameters,
                                                  String media)
        Creates a CssReferenceHeaderItem for the given reference.
        Parameters:
        reference - a reference to a CSS resource
        pageParameters - the parameters for this CSS resource reference
        media - the media type for this CSS ("print", "screen", etc.)
        Returns:
        A newly created CssReferenceHeaderItem for the given reference.

      • forReference

        public static CssReferenceHeaderItem forReference​(ResourceReference reference,
                                                  org.apache.wicket.request.mapper.parameter.PageParameters pageParameters,
                                                  String media,
                                                  String rel)
        Creates a CssReferenceHeaderItem for the given reference. Warning: the conditional comments don't work when injected dynamically with JavaScript (i.e. in Ajax response). An alternative solution is to use user agent sniffing at the server side: 
         public void renderHead(IHeaderResponse response) {
   WebClientInfo clientInfo = (WebClientInfo) getSession().getClientInfo();
   ClientProperties properties = clientInfo.getProperties();
   if (properties.isBrowserInternetExplorer() && properties.getBrowserVersionMajor() >= 8) {
     response.renderCSSReference(new PackageResourceReference(MyPage.class, "my-conditional.css" ));
   }
 }
        Parameters:
        reference - a reference to a CSS resource
        pageParameters - the parameters for this CSS resource reference
        media - the media type for this CSS ("print", "screen", etc.)
        rel - the rel attribute content
        Returns:
        A newly created CssReferenceHeaderItem for the given reference.

      • forCSS

        public static CssContentHeaderItem forCSS​(CharSequence css,
                                          String id)
        Creates a CssContentHeaderItem for the given content.
        Parameters:
        css - css content to be rendered.
        id - unique id for the <style> element. This can be null, however in that case the ajax header contribution can't detect duplicate CSS fragments.
        Returns:
        A newly created CssContentHeaderItem for the given content.

      • forUrl

        public static CssUrlReferenceHeaderItem forUrl​(String url,
                                               String media,
                                               String rel)
        Creates a CssUrlReferenceHeaderItem for the given url. Warning: the conditional comments don't work when injected dynamically with JavaScript (i.e. in Ajax response). An alternative solution is to use user agent sniffing at the server side: 
         public void renderHead(IHeaderResponse response) {
   WebClientInfo clientInfo = (WebClientInfo) getSession().getClientInfo();
   ClientProperties properties = clientInfo.getProperties();
   if (properties.isBrowserInternetExplorer() && properties.getBrowserVersionMajor() >= 8) {
     response.renderCSSReference(new PackageResourceReference(MyPage.class, "my-conditional.css" ));
   }
 }
        Parameters:
        url - context-relative url of the CSS resource
        media - the media type for this CSS ("print", "screen", etc.)
        rel - the rel attribute content
        Returns:
        A newly created CssUrlReferenceHeaderItem for the given url.

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class Object