gecko-dev/layout/generic/nsObjectFrame.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef nsObjectFrame_h___
#define nsObjectFrame_h___

#include "nsHTMLParts.h"
#include "nsHTMLContainerFrame.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIPluginHost.h"
#include "nsplugin.h"
#include "nsIWidget.h"
#include "nsIObjectFrame.h"

#ifdef ACCESSIBILITY
class nsIAccessible;
#endif

class nsPluginInstanceOwner;

#define nsObjectFrameSuper nsHTMLContainerFrame

class nsObjectFrame : public nsObjectFrameSuper, public nsIObjectFrame {
public:
  // nsISupports 
  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);

  NS_IMETHOD SetInitialChildList(nsPresContext* aPresContext,
                                 nsIAtom* aListName,
                                 nsIFrame* aChildList);
  NS_IMETHOD Init(nsPresContext* aPresContext,
                  nsIContent* aContent,
                  nsIFrame* aParent,
                  nsStyleContext* aContext,
                  nsIFrame* aPrevInFlow);
  NS_IMETHOD Reflow(nsPresContext* aPresContext,
                    nsHTMLReflowMetrics& aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus);
  NS_IMETHOD DidReflow(nsPresContext* aPresContext,
                       const nsHTMLReflowState* aReflowState,
                       nsDidReflowStatus aStatus);
  NS_IMETHOD Paint(nsPresContext* aPresContext,
                   nsIRenderingContext& aRenderingContext,
                   const nsRect& aDirtyRect,
                   nsFramePaintLayer aWhichLayer,
                   PRUint32 aFlags = 0);

  NS_IMETHOD  HandleEvent(nsPresContext* aPresContext,
                          nsGUIEvent* aEvent,
                          nsEventStatus* aEventStatus);

  virtual nsIAtom* GetType() const;
  virtual PRBool SupportsVisibilityHidden() { return PR_FALSE; }
  virtual PRBool NeedsView() { return PR_TRUE; }
  virtual nsresult CreateWidgetForView(nsIView* aView);

  virtual PRBool IsLeaf() const;
  
#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif

  NS_IMETHOD Destroy(nsPresContext* aPresContext);

  NS_IMETHOD GetPluginInstance(nsIPluginInstance*& aPluginInstance);
  virtual nsresult Instantiate(nsIChannel* aChannel, nsIStreamListener** aStreamListener);
  virtual nsresult Instantiate(const char* aMimeType, nsIURI* aURI);
  virtual void StopPlugin();


  /* fail on any requests to get a cursor from us because plugins set their own! see bug 118877 */
  NS_IMETHOD GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor) 
  {
    return NS_ERROR_NOT_IMPLEMENTED;
  };

  // accessibility support
#ifdef ACCESSIBILITY
  NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#ifdef XP_WIN
  NS_IMETHOD GetPluginPort(HWND *aPort);
#endif
#endif

  //local methods
  nsresult CreateWidget(nscoord aWidth, nscoord aHeight, PRBool aViewOnly);
  nsIURI* GetFullURL()
  {
    return mFullURL;
  }

  // for a given aRoot, this walks the frame tree looking for the next outFrame
  static nsIObjectFrame* GetNextObjectFrame(nsPresContext* aPresContext,
                                            nsIFrame* aRoot);

  void FixUpURLS(const nsString &name, nsAString &value);

  virtual PRBool IsContainingBlock() const
  {
    return PR_FALSE;
  }

protected:
  // nsISupports
  NS_IMETHOD_(nsrefcnt) AddRef(void);
  NS_IMETHOD_(nsrefcnt) Release(void);

  virtual ~nsObjectFrame();

  virtual PRIntn GetSkipSides() const;

  // NOTE:  This frame class does not inherit from |nsLeafFrame|, so
  // this is not a virtual method implementation.
  void GetDesiredSize(nsPresContext* aPresContext,
                      const nsHTMLReflowState& aReflowState,
                      nsHTMLReflowMetrics& aDesiredSize);

  nsresult InstantiatePlugin(nsIPluginHost* aPluginHost, 
                             const char* aMimetype,
                             nsIURI* aURL);

  /**
   * Adjust the plugin's idea of its size, using aSize as its new size.
   * (aSize must be in twips)
   */
  void FixupWindow(const nsSize& aSize);

  PRBool IsFocusable(PRInt32 *aTabIndex = nsnull, PRBool aWithMouse = PR_FALSE);

  // check attributes and optionally CSS to see if we should display anything
  PRBool IsHidden(PRBool aCheckVisibilityStyle = PR_TRUE) const;

  void NotifyContentObjectWrapper();

  nsPoint GetWindowOriginInPixels(PRBool aWindowless);

  /**
   * Makes sure that mInstanceOwner is valid and without a current plugin
   * instance. Essentially, this prepares the frame to receive a new plugin.
   */
  NS_HIDDEN_(nsresult) PrepareInstanceOwner();

  friend class nsPluginInstanceOwner;
private:
  nsPluginInstanceOwner *mInstanceOwner;
  nsCOMPtr<nsIURI>      mFullURL;
  nsRect                mWindowlessRect;

#ifdef DEBUG
  // For assertions that make it easier to determine if a crash is due
  // to the underlying problem described in bug 136927.
  PRBool mInstantiating;
#endif
};


#endif /* nsObjectFrame_h___ */