gecko/content/base/src/Link.cpp

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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is
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 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
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#include "Link.h"

#include "nsIEventStateManager.h"

namespace mozilla {
namespace dom {

Link::Link()
  : mLinkState(defaultState)
{
}

nsLinkState
Link::GetLinkState() const
{
  return mLinkState;
}

void
Link::SetLinkState(nsLinkState aState)
{
  mLinkState = aState;
}

PRInt32
Link::LinkState() const
{
  if (mLinkState == eLinkState_Visited) {
    return NS_EVENT_STATE_VISITED;
  }

  if (mLinkState == eLinkState_Unvisited) {
    return NS_EVENT_STATE_UNVISITED;
  }

  return 0;
}

already_AddRefed<nsIURI>
Link::GetURI() const
{
  nsCOMPtr<nsIURI> uri(mCachedURI);

  // If we have this URI cached, use it.
  if (uri) {
    return uri.forget();
  }

  // Otherwise obtain it.
  Link *self = const_cast<Link *>(this);
  nsCOMPtr<nsIContent> content(do_QueryInterface(self));
  NS_ASSERTION(content, "Why isn't this an nsIContent node?!");
  uri = content->GetHrefURI();

  // We want to cache the URI if the node is in the document.
  if (uri && content->IsInDoc()) {
    mCachedURI = uri;
  }

  return uri.forget();
}

void
Link::ResetLinkState()
{
  nsCOMPtr<nsIContent> content(do_QueryInterface(this));
  NS_ASSERTION(content, "Why isn't this an nsIContent node?!");

  // Tell the document to forget about this link.
  nsIDocument *doc = content->GetCurrentDoc();
  if (doc) {
    doc->ForgetLink(content);
  }

  // Update our state back to the default.
  mLinkState = defaultState;

  // Get rid of our cached URI.
  mCachedURI = nsnull;
}

} // namespace dom
} // namespace mozilla