gecko-dev/content/html/document/src/nsMediaDocument.cpp

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 * The Original Code is Mozilla Communicator client code.
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#include "nsMediaDocument.h"
#include "nsHTMLAtoms.h"
#include "nsRect.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIScrollable.h"
#include "nsIViewManager.h"

nsMediaDocumentStreamListener::nsMediaDocumentStreamListener(nsMediaDocument *aDocument)
{
  mDocument = aDocument;
}

nsMediaDocumentStreamListener::~nsMediaDocumentStreamListener()
{
}


NS_IMPL_THREADSAFE_ISUPPORTS2(nsMediaDocumentStreamListener,
                              nsIRequestObserver,
                              nsIStreamListener)


void
nsMediaDocumentStreamListener::SetStreamListener(nsIStreamListener *aListener)
{
  mNextStream = aListener;
}

NS_IMETHODIMP
nsMediaDocumentStreamListener::OnStartRequest(nsIRequest* request, nsISupports *ctxt)
{
  mDocument->StartLayout();

  if (mNextStream) {
    return mNextStream->OnStartRequest(request, ctxt);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsMediaDocumentStreamListener::OnStopRequest(nsIRequest* request,
                                             nsISupports *ctxt,
                                             nsresult status)
{
  if (mNextStream) {
    return mNextStream->OnStopRequest(request, ctxt, status);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsMediaDocumentStreamListener::OnDataAvailable(nsIRequest* request,
                                               nsISupports *ctxt,
                                               nsIInputStream *inStr,
                                               PRUint32 sourceOffset,
                                               PRUint32 count)
{
  if (mNextStream) {
    return mNextStream->OnDataAvailable(request, ctxt, inStr, sourceOffset, count);
  }

  return NS_OK;
}

nsMediaDocument::nsMediaDocument()
{
}
nsMediaDocument::~nsMediaDocument()
{
}

NS_IMETHODIMP
nsMediaDocument::StartDocumentLoad(const char*         aCommand,
                                   nsIChannel*         aChannel,
                                   nsILoadGroup*       aLoadGroup,
                                   nsISupports*        aContainer,
                                   nsIStreamListener** aDocListener,
                                   PRBool              aReset,
                                   nsIContentSink*     aSink)
{
  nsresult rv = nsDocument::StartDocumentLoad(aCommand, aChannel, aLoadGroup,
                                              aContainer, aDocListener, aReset,
                                              aSink);
  if (NS_FAILED(rv)) {
    return rv;
  }

  RetrieveRelevantHeaders(aChannel);

  return NS_OK;
}

nsresult
nsMediaDocument::CreateSyntheticDocument()
{
  // Synthesize an empty html document
  nsresult rv;

  nsCOMPtr<nsINodeInfo> nodeInfo;
  rv = mNodeInfoManager->GetNodeInfo(nsHTMLAtoms::html, nsnull,
                                     kNameSpaceID_None,
                                     *getter_AddRefs(nodeInfo));
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIHTMLContent> root;
  rv = NS_NewHTMLHtmlElement(getter_AddRefs(root), nodeInfo);
  if (NS_FAILED(rv)) {
    return rv;
  }
  root->SetDocument(this, PR_FALSE, PR_TRUE);
  SetRootContent(root);

  rv = mNodeInfoManager->GetNodeInfo(nsHTMLAtoms::body, nsnull,
                                     kNameSpaceID_None,
                                     *getter_AddRefs(nodeInfo));
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIHTMLContent> body;
  rv = NS_NewHTMLBodyElement(getter_AddRefs(body), nodeInfo);
  if (NS_FAILED(rv)) {
    return rv;
  }
  body->SetDocument(this, PR_FALSE, PR_TRUE);
  mBodyContent = do_QueryInterface(body);

  root->AppendChildTo(body, PR_FALSE, PR_FALSE);

  return NS_OK;
}

nsresult
nsMediaDocument::StartLayout()
{
  // Reset scrolling to default settings for this shell.
  // This must happen before the initial reflow, when we create the root frame
  nsCOMPtr<nsIScrollable> scrollableContainer(do_QueryReferent(mDocumentContainer));
  if (scrollableContainer) {
    scrollableContainer->ResetScrollbarPreferences();
  }

  PRInt32 numberOfShells = GetNumberOfShells();
  for (PRInt32 i = 0; i < numberOfShells; i++) {
    nsCOMPtr<nsIPresShell> shell;
    GetShellAt(i, getter_AddRefs(shell));
    if (shell) {
      // Make shell an observer for next time.
      shell->BeginObservingDocument();

      // Initial-reflow this time.
      nsCOMPtr<nsIPresContext> context;
      shell->GetPresContext(getter_AddRefs(context));
      nsRect visibleArea;
      context->GetVisibleArea(visibleArea);
      shell->InitialReflow(visibleArea.width, visibleArea.height);

      // Now trigger a refresh.
      nsCOMPtr<nsIViewManager> vm;
      shell->GetViewManager(getter_AddRefs(vm));
      if (vm) {
        vm->EnableRefresh(NS_VMREFRESH_IMMEDIATE);
      }
    }
  }

  return NS_OK;
}