/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:set ts=2 sts=2 sw=2 et cin:
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsPluginInstanceOwner_h_
#define nsPluginInstanceOwner_h_

#include "mozilla/Attributes.h"
#include "npapi.h"
#include "nsCOMPtr.h"
#include "nsIKeyEventInPluginCallback.h"
#include "nsIPluginInstanceOwner.h"
#include "nsIPrivacyTransitionObserver.h"
#include "nsIDOMEventListener.h"
#include "nsPluginHost.h"
#include "nsPluginNativeWindow.h"
#include "nsWeakReference.h"
#include "gfxRect.h"

class nsIInputStream;
class nsPluginDOMContextMenuListener;
class nsPluginFrame;
class nsDisplayListBuilder;

#ifdef MOZ_X11
class gfxContext;
#endif

namespace mozilla {
class TextComposition;
namespace dom {
struct MozPluginParameter;
} // namespace dom
namespace widget {
class PuppetWidget;
} // namespace widget
} // namespace mozilla

using mozilla::widget::PuppetWidget;

#ifdef MOZ_X11
#include "gfxXlibNativeRenderer.h"
#endif

class nsPluginInstanceOwner final : public nsIPluginInstanceOwner
                                  , public nsIDOMEventListener
                                  , public nsIPrivacyTransitionObserver
                                  , public nsIKeyEventInPluginCallback
                                  , public nsSupportsWeakReference
{
public:
  typedef mozilla::gfx::DrawTarget DrawTarget;

  nsPluginInstanceOwner();
  
  NS_DECL_ISUPPORTS
  NS_DECL_NSIPLUGININSTANCEOWNER
  NS_DECL_NSIPRIVACYTRANSITIONOBSERVER
  
  NS_IMETHOD GetURL(const char *aURL, const char *aTarget,
                    nsIInputStream *aPostStream, 
                    void *aHeadersData, uint32_t aHeadersDataLen,
                    bool aDoCheckLoadURIChecks) override;
  
  NPBool     ConvertPoint(double sourceX, double sourceY, NPCoordinateSpace sourceSpace,
                          double *destX, double *destY, NPCoordinateSpace destSpace) override;

  NPError InitAsyncSurface(NPSize *size, NPImageFormat format,
                           void *initData, NPAsyncSurface *surface) override;
  NPError FinalizeAsyncSurface(NPAsyncSurface *surface) override;
  void SetCurrentAsyncSurface(NPAsyncSurface *surface, NPRect *changed) override;

  /**
   * Get the type of the HTML tag that was used ot instantiate this
   * plugin.  Currently supported tags are EMBED, OBJECT and APPLET.
   */
  NS_IMETHOD GetTagType(nsPluginTagType *aResult);

  void GetParameters(nsTArray<mozilla::dom::MozPluginParameter>& parameters);
  void GetAttributes(nsTArray<mozilla::dom::MozPluginParameter>& attributes);

  /**
   * Returns the DOM element corresponding to the tag which references
   * this plugin in the document.
   *
   * @param aDOMElement - resulting DOM element
   * @result - NS_OK if this operation was successful
   */
  NS_IMETHOD GetDOMElement(nsIDOMElement* * aResult);
  
  // nsIDOMEventListener interfaces 
  NS_DECL_NSIDOMEVENTLISTENER
  
  nsresult ProcessMouseDown(nsIDOMEvent* aKeyEvent);
  nsresult ProcessKeyPress(nsIDOMEvent* aKeyEvent);
  nsresult Destroy();  

#ifdef XP_WIN
  void Paint(const RECT& aDirty, HDC aDC);
#elif defined(MOZ_X11)
  void Paint(gfxContext* aContext,
             const gfxRect& aFrameRect,
             const gfxRect& aDirtyRect);
#endif

  //locals
  
  nsresult Init(nsIContent* aContent);
  
  void* GetPluginPort();
  void ReleasePluginPort(void* pluginPort);

  nsEventStatus ProcessEvent(const mozilla::WidgetGUIEvent& anEvent);

  static void GeneratePluginEvent(
                const mozilla::WidgetCompositionEvent* aSrcCompositionEvent,
                mozilla::WidgetCompositionEvent* aDistCompositionEvent);

#if defined(XP_WIN)
  void SetWidgetWindowAsParent(HWND aWindowToAdopt);
  nsresult SetNetscapeWindowAsParent(HWND aWindowToAdopt);
#endif
  
  void UpdateWindowPositionAndClipRect(bool aSetWindow);
  void UpdateWindowVisibility(bool aVisible);

  void ResolutionMayHaveChanged();
#if defined(XP_WIN)
  nsresult ContentsScaleFactorChanged(double aContentsScaleFactor);
#endif

  void UpdateDocumentActiveState(bool aIsActive);

  void SetFrame(nsPluginFrame *aFrame);
  nsPluginFrame* GetFrame();

  uint32_t GetLastEventloopNestingLevel() const {
    return mLastEventloopNestingLevel; 
  }
  
  static uint32_t GetEventloopNestingLevel();
  
  void ConsiderNewEventloopNestingLevel() {
    uint32_t currentLevel = GetEventloopNestingLevel();
    
    if (currentLevel < mLastEventloopNestingLevel) {
      mLastEventloopNestingLevel = currentLevel;
    }
  }
  
  const char* GetPluginName()
  {
    if (mInstance && mPluginHost) {
      const char* name = nullptr;
      if (NS_SUCCEEDED(mPluginHost->GetPluginName(mInstance, &name)) && name)
        return name;
    }
    return "";
  }
  
#ifdef MOZ_X11
  void GetPluginDescription(nsACString& aDescription)
  {
    aDescription.Truncate();
    if (mInstance && mPluginHost) {
      nsCOMPtr<nsIPluginTag> pluginTag;
      
      mPluginHost->GetPluginTagForInstance(mInstance,
                                           getter_AddRefs(pluginTag));
      if (pluginTag) {
        pluginTag->GetDescription(aDescription);
      }
    }
  }
#endif
  
  bool SendNativeEvents()
  {
#ifdef XP_WIN
    // XXX we should remove the plugin name check
    return mPluginWindow->type == NPWindowTypeDrawable &&
    (MatchPluginName("Shockwave Flash") ||
     MatchPluginName("Test Plug-in"));
#elif defined(MOZ_X11)
    return true;
#else
    return false;
#endif
  }
  
  bool MatchPluginName(const char *aPluginName)
  {
    return strncmp(GetPluginName(), aPluginName, strlen(aPluginName)) == 0;
  }
  
  void NotifyPaintWaiter(nsDisplayListBuilder* aBuilder);

  // Returns the image container that has our currently displayed image.
  already_AddRefed<mozilla::layers::ImageContainer> GetImageContainer();
  // Returns true if this is windowed plugin that can return static captures
  // for scroll operations.
  bool NeedsScrollImageLayer();

  void DidComposite();

  /**
   * Returns the bounds of the current async-rendered surface. This can only
   * change in response to messages received by the event loop (i.e. not during
   * painting).
   */
  nsIntSize GetCurrentImageSize();
  
  // Methods to update the background image we send to async plugins.
  // The eventual target of these operations is PluginInstanceParent,
  // but it takes several hops to get there.
  void SetBackgroundUnknown();
  already_AddRefed<DrawTarget> BeginUpdateBackground(const nsIntRect& aRect);
  void EndUpdateBackground(const nsIntRect& aRect);

  bool UseAsyncRendering();

  already_AddRefed<nsIURI> GetBaseURI() const;

  void NotifyHostAsyncInitFailed();
  void NotifyHostCreateWidget();
  void NotifyDestroyPending();

  bool GetCompositionString(uint32_t aIndex, nsTArray<uint8_t>* aString,
                            int32_t* aLength);
  bool SetCandidateWindow(
           const mozilla::widget::CandidateWindowPosition& aPosition);
  bool RequestCommitOrCancel(bool aCommitted);

  // See nsIKeyEventInPluginCallback
  virtual void HandledWindowedPluginKeyEvent(
                 const mozilla::NativeEventData& aKeyEventData,
                 bool aIsConsumed) override;

  /**
   * OnWindowedPluginKeyEvent() is called when the plugin process receives
   * native key event directly.
   *
   * @param aNativeKeyData      The key event which was received by the
   *                            plugin process directly.
   */
  void OnWindowedPluginKeyEvent(
         const mozilla::NativeEventData& aNativeKeyData);

  void GetCSSZoomFactor(float *result);
private:
  virtual ~nsPluginInstanceOwner();

  // return FALSE if LayerSurface dirty (newly created and don't have valid plugin content yet)
  bool IsUpToDate()
  {
    nsIntSize size;
    return NS_SUCCEEDED(mInstance->GetImageSize(&size)) &&
    size == nsIntSize(mPluginWindow->width, mPluginWindow->height);
  }

#ifdef XP_WIN
  nsIWidget* GetContainingWidgetIfOffset();
  already_AddRefed<mozilla::TextComposition> GetTextComposition();
  void HandleNoConsumedCompositionMessage(
    mozilla::WidgetCompositionEvent* aCompositionEvent,
    const NPEvent* aPluginEvent);
  bool mGotCompositionData;
  bool mSentStartComposition;
  bool mPluginDidNotHandleIMEComposition;
#endif
 
  nsPluginNativeWindow       *mPluginWindow;
  RefPtr<nsNPAPIPluginInstance> mInstance;
  nsPluginFrame              *mPluginFrame;
  nsWeakPtr                   mContent; // WEAK, content owns us
  nsCString                   mDocumentBase;
  bool                        mWidgetCreationComplete;
  nsCOMPtr<nsIWidget>         mWidget;
  RefPtr<nsPluginHost>      mPluginHost;
  
  double                                    mLastScaleFactor;
  double                                    mLastCSSZoomFactor;
  // Initially, the event loop nesting level we were created on, it's updated
  // if we detect the appshell is on a lower level as long as we're not stopped.
  // We delay DoStopPlugin() until the appshell reaches this level or lower.
  uint32_t                    mLastEventloopNestingLevel;
  bool                        mContentFocused;
  bool                        mWidgetVisible;    // used on Mac to store our widget's visible state
#ifdef MOZ_X11
  // Used with windowless plugins only, initialized in CreateWidget().
  bool                        mFlash10Quirks;
#endif
  bool                        mPluginWindowVisible;
  bool                        mPluginDocumentActiveState;

  // pointer to wrapper for nsIDOMContextMenuListener
  RefPtr<nsPluginDOMContextMenuListener> mCXMenuListener;
  
  nsresult DispatchKeyToPlugin(nsIDOMEvent* aKeyEvent);
  nsresult DispatchMouseToPlugin(nsIDOMEvent* aMouseEvent,
                                 bool aAllowPropagate = false);
  nsresult DispatchFocusToPlugin(nsIDOMEvent* aFocusEvent);
  nsresult DispatchCompositionToPlugin(nsIDOMEvent* aEvent);

#ifdef XP_WIN
  void CallDefaultProc(const mozilla::WidgetGUIEvent* aEvent);
#endif

  int mLastMouseDownButtonType;

#ifdef MOZ_X11
  class Renderer : public gfxXlibNativeRenderer
  {
  public:
    Renderer(NPWindow* aWindow, nsPluginInstanceOwner* aInstanceOwner,
             const nsIntSize& aPluginSize, const nsIntRect& aDirtyRect)
    : mWindow(aWindow), mInstanceOwner(aInstanceOwner),
    mPluginSize(aPluginSize), mDirtyRect(aDirtyRect)
    {}
    virtual nsresult DrawWithXlib(cairo_surface_t* surface,
                                  nsIntPoint offset,
                                  nsIntRect* clipRects, uint32_t numClipRects) override;
  private:
    NPWindow* mWindow;
    nsPluginInstanceOwner* mInstanceOwner;
    const nsIntSize& mPluginSize;
    const nsIntRect& mDirtyRect;
  };
#endif

  bool mWaitingForPaint;
};

#endif // nsPluginInstanceOwner_h_