gecko/parser/htmlparser/public/nsIFragmentContentSink.h

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#ifndef nsIFragmentContentSink_h___
#define nsIFragmentContentSink_h___

#include "nsISupports.h"

class nsIDOMDocumentFragment;
class nsIDocument;

#define NS_I_FRAGMENT_CONTENT_SINK_IID \
  { 0x1ecdb30d, 0x1f10, 0x45d2, \
    { 0xa4, 0xf4, 0xec, 0xbc, 0x03, 0x52, 0x9a, 0x7e } }

/**
 * The fragment sink allows a client to parse a fragment of sink, possibly
 * surrounded in context. Also see nsIParser::ParseFragment().
 * Note: once you've parsed a fragment, the fragment sink must be re-set on
 * the parser in order to parse another fragment.
 */
class nsIFragmentContentSink : public nsISupports {
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_I_FRAGMENT_CONTENT_SINK_IID)
  /**
   * This method is used to obtain the fragment created by
   * a fragment content sink. The value returned will be null
   * if the content sink hasn't yet received parser notifications.
   *
   * If aWillOwnFragment is PR_TRUE then the sink should drop its
   * ownership of the fragment.
   */
  NS_IMETHOD GetFragment(PRBool aWillOwnFragment,
                         nsIDOMDocumentFragment** aFragment) = 0;

  /**
   * This method is used to set the target document for this fragment
   * sink.  This document's nodeinfo manager will be used to create
   * the content objects.  This MUST be called before the sink is used.
   *
   * @param aDocument the document the new nodes will belong to
   * (should not be null)
   */
  NS_IMETHOD SetTargetDocument(nsIDocument* aDocument) = 0;

  /**
   * This method is used to indicate to the sink that we're done building
   * the context and should start paying attention to the incoming content
   */
  NS_IMETHOD WillBuildContent() = 0;

  /**
   * This method is used to indicate to the sink that we're done building
   * The real content. This is useful if you want to parse additional context
   * (such as an end context).
   */
  NS_IMETHOD DidBuildContent() = 0;

  /**
   * This method is a total hack to help with parsing fragments. It is called to
   * tell the fragment sink that a container from the context will be delivered
   * after the call to WillBuildContent(). This is only relevent for HTML
   * fragments that use nsHTMLTokenizer/CNavDTD.
   */
  NS_IMETHOD IgnoreFirstContainer() = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIFragmentContentSink,
                              NS_I_FRAGMENT_CONTENT_SINK_IID)

/**
 * Base version takes string nested in context, content surrounded by
 * WillBuildContent()/DidBuildContent() calls. The 2nd version just loads
 * the whole string.
 */

#define NS_HTMLFRAGMENTSINK_CONTRACTID "@mozilla.org/layout/htmlfragmentsink;1"
#define NS_HTMLFRAGMENTSINK2_CONTRACTID "@mozilla.org/layout/htmlfragmentsink;2"
#define NS_HTMLPARANOIDFRAGMENTSINK_CONTRACTID \
"@mozilla.org/htmlparanoidfragmentsink;1"

#define NS_XMLFRAGMENTSINK_CONTRACTID "@mozilla.org/layout/xmlfragmentsink;1"
#define NS_XMLFRAGMENTSINK2_CONTRACTID "@mozilla.org/layout/xmlfragmentsink;2"
#define NS_XHTMLPARANOIDFRAGMENTSINK_CONTRACTID \
"@mozilla.org/xhtmlparanoidfragmentsink;1"


// the HTML versions are in nsHTMLParts.h
nsresult
NS_NewXMLFragmentContentSink(nsIFragmentContentSink** aInstancePtrResult);
nsresult
NS_NewXMLFragmentContentSink2(nsIFragmentContentSink** aInstancePtrResult);

// This strips all but a whitelist of elements and attributes defined
// in nsContentSink.h
nsresult
NS_NewXHTMLParanoidFragmentSink(nsIFragmentContentSink** aInstancePtrResult);
void
NS_XHTMLParanoidFragmentSinkShutdown();
#endif