author Robert O'Callahan <>
Sat, 14 Aug 2010 02:31:48 +1200
changeset 50433 1ad7cdc1ab5aed8f324ff66432cbcab7e4c44a43
parent 50409 5d549dd2b22c7b20a47253e481dd1b4913e84617
child 50668 f52342744bda11892aecff44ce6fc9368e97da3b
permissions -rw-r--r--
Backing out bug 584282 and bug 537890

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is code.
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

/* rendering objects for replaced elements implemented by a plugin */

#ifndef nsObjectFrame_h___
#define nsObjectFrame_h___

#ifdef XP_WIN
#include <windows.h>

#include "nsIObjectFrame.h"
#include "nsFrame.h"
#include "nsRegion.h"
#include "nsDisplayList.h"

class nsIAccessible;

class nsPluginInstanceOwner;
class nsIPluginHost;
class nsIPluginInstance;
class nsPresContext;
class nsDisplayPlugin;
class nsIDOMElement;

#define nsObjectFrameSuper nsFrame

class nsObjectFrame : public nsObjectFrameSuper, public nsIObjectFrame {

  friend nsIFrame* NS_NewObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);


  NS_IMETHOD Init(nsIContent* aContent,
                  nsIFrame* aParent,
                  nsIFrame* aPrevInFlow);
  virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
  virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
  NS_IMETHOD Reflow(nsPresContext* aPresContext,
                    nsHTMLReflowMetrics& aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus);
  NS_IMETHOD DidReflow(nsPresContext* aPresContext,
                       const nsHTMLReflowState* aReflowState,
                       nsDidReflowStatus aStatus);
  NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                              const nsRect&           aDirtyRect,
                              const nsDisplayListSet& aLists);

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

#ifdef XP_MACOSX
  NS_IMETHOD HandlePress(nsPresContext* aPresContext,
                         nsGUIEvent*    aEvent,
                         nsEventStatus* aEventStatus);

  virtual nsIAtom* GetType() const;

  virtual PRBool IsFrameOfType(PRUint32 aFlags) const
    return nsObjectFrameSuper::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));

  virtual PRBool NeedsView() { return PR_TRUE; }

#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const;

  virtual void DestroyFrom(nsIFrame* aDestructRoot);

  virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);

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

   * Stop a plugin instance. If aDelayedStop is true, the plugin will
   * be stopped at a later point when it's safe to do so (i.e. not
   * while destroying the frame tree). Delayed stopping is only
   * implemented on Win32 for now.
  void StopPluginInternal(PRBool aDelayedStop);

  /* 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) 

  // Compute the desired position of the plugin's widget, on the assumption
  // that it is not visible (clipped out or covered by opaque content).
  // This will only be called for plugins which have been registered
  // with the root pres context for geometry updates.
  // The widget, its new position, size and (empty) clip region are appended
  // as a Configuration record to aConfigurations.
  // If there is no widget associated with the plugin, this
  // simply does nothing.
  void GetEmptyClipConfiguration(nsTArray<nsIWidget::Configuration>* aConfigurations) {
    ComputeWidgetGeometry(nsRegion(), nsPoint(0,0), aConfigurations);

  void DidSetWidgetGeometry();

  // accessibility support
  virtual already_AddRefed<nsAccessible> CreateAccessible();
#ifdef XP_WIN
  NS_IMETHOD GetPluginPort(HWND *aPort);

  //local methods
  nsresult CreateWidget(nscoord aWidth, nscoord aHeight, PRBool aViewOnly);

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

  nsObjectFrame(nsStyleContext* aContext);
  virtual ~nsObjectFrame();

  // 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);

   * Sets up the plugin window and calls SetWindow on the plugin.
  void CallSetWindow();

  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;

  PRBool IsOpaque() const;

  void NotifyContentObjectWrapper();

  nsIntPoint GetWindowOriginInPixels(PRBool aWindowless);

  static void PaintPrintPlugin(nsIFrame* aFrame,
                               nsIRenderingContext* aRenderingContext,
                               const nsRect& aDirtyRect, nsPoint aPt);
  void PrintPlugin(nsIRenderingContext& aRenderingContext,
                   const nsRect& aDirtyRect);
  void PaintPlugin(nsIRenderingContext& aRenderingContext,
                   const nsRect& aDirtyRect, const nsRect& aPluginRect);

   * 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();

   * Get the widget geometry for the plugin. aRegion is in some appunits
   * coordinate system whose origin is device-pixel-aligned (if possible),
   * and aPluginOrigin gives the top-left of the plugin frame's content-rect
   * in that coordinate system. It doesn't matter what that coordinate
   * system actually is, as long as aRegion and aPluginOrigin are consistent.
   * This will append a Configuration object to aConfigurations
   * containing the widget, its desired position, size and clip region.
  void ComputeWidgetGeometry(const nsRegion& aRegion,
                             const nsPoint& aPluginOrigin,
                             nsTArray<nsIWidget::Configuration>* aConfigurations);

  nsIWidget* GetWidget() { return mWidget; }

  nsresult SetAbsoluteScreenPosition(nsIDOMElement* element,
                                     nsIDOMClientRect* position,
                                     nsIDOMClientRect* clip);

  void NotifyPluginReflowObservers();

  friend class nsPluginInstanceOwner;
  friend class nsDisplayPlugin;

  class PluginEventNotifier : public nsRunnable {
    PluginEventNotifier(const nsString &aEventType) : 
      mEventType(aEventType) {}
    NS_IMETHOD Run();
    nsString mEventType;
  nsRefPtr<nsPluginInstanceOwner> mInstanceOwner;
  nsIView*                        mInnerView;
  nsCOMPtr<nsIWidget>             mWidget;
  nsIntRect                       mWindowlessRect;
#ifdef XP_WIN
  PRUint32                        mDoublePassEvent;

  // For assertions that make it easier to determine if a crash is due
  // to the underlying problem described in bug 136927, and to prevent
  // reentry into instantiation.
  PRBool mPreventInstantiation;

class nsDisplayPlugin : public nsDisplayItem {
  nsDisplayPlugin(nsIFrame* aFrame)
    : nsDisplayItem(aFrame)
  virtual ~nsDisplayPlugin() {

  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder);
  virtual PRBool IsOpaque(nsDisplayListBuilder* aBuilder);
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsIRenderingContext* aCtx);
  virtual PRBool ComputeVisibility(nsDisplayListBuilder* aBuilder,
                                   nsRegion* aVisibleRegion);


  // Compute the desired position and clip region of the plugin's widget.
  // This will only be called for plugins which have been registered
  // with the root pres context for geometry updates.
  // The widget, its new position, size and clip region are appended as
  // a Configuration record to aConfigurations.
  // If there is no widget associated with the plugin, this
  // simply does nothing.
  void GetWidgetConfiguration(nsDisplayListBuilder* aBuilder,
                              nsTArray<nsIWidget::Configuration>* aConfigurations);

  nsRegion mVisibleRegion;

#endif /* nsObjectFrame_h___ */