nsresult nsViewManager::DispatchEvent(nsGUIEvent *aEvent, nsIView* aView, nsEventStatus* aStatus)
{
  SAMPLE_LABEL("event", "nsViewManager::DispatchEvent");

  if ((NS_IS_MOUSE_EVENT(aEvent) &&
       // Ignore mouse events that we synthesize.
       static_cast<nsMouseEvent*>(aEvent)->reason == nsMouseEvent::eReal &&
       // Ignore mouse exit and enter (we'll get moves if the user
       // is really moving the mouse) since we get them when we
       // create and destroy widgets.
       aEvent->message != NS_MOUSE_EXIT &&
       aEvent->message != NS_MOUSE_ENTER) ||
      NS_IS_KEY_EVENT(aEvent) ||
      NS_IS_IME_EVENT(aEvent) ||
      aEvent->message == NS_PLUGIN_INPUT_EVENT) {
    gLastUserEventTime = PR_IntervalToMicroseconds(PR_IntervalNow());
  }

  // Find the view whose coordinates system we're in.
  nsIView* view = aView;
  bool dispatchUsingCoordinates = NS_IsEventUsingCoordinates(aEvent);
  if (dispatchUsingCoordinates) {
    // Will dispatch using coordinates. Pretty bogus but it's consistent
    // with what presshell does.
    view = GetDisplayRootFor(view);
  }

  // If the view has no frame, look for a view that does.
  nsIFrame* frame = view->GetFrame();
  if (!frame &&
      (dispatchUsingCoordinates || NS_IS_KEY_EVENT(aEvent) ||
       NS_IS_IME_RELATED_EVENT(aEvent) ||
       NS_IS_NON_RETARGETED_PLUGIN_EVENT(aEvent) ||
       aEvent->message == NS_PLUGIN_ACTIVATE ||
       aEvent->message == NS_PLUGIN_FOCUS ||
       aEvent->message == NS_PLUGIN_RESOLUTION_CHANGED)) {
    while (view && !view->GetFrame()) {
      view = view->GetParent();
    }

    if (view) {
      frame = view->GetFrame();
    }
  }

  if (nullptr != frame) {
    // Hold a refcount to the presshell. The continued existence of the
    // presshell will delay deletion of this view hierarchy should the event
    // want to cause its destruction in, say, some JavaScript event handler.
    nsCOMPtr<nsIPresShell> shell = view->GetViewManager()->GetPresShell();
    if (shell) {
      return shell->HandleEvent(frame, aEvent, false, aStatus);
    }
  }

  *aStatus = nsEventStatus_eIgnore;

  return NS_OK;
}
Ejemplo n.º 2
0
NS_IMETHODIMP nsViewManager::DispatchEvent(nsGUIEvent *aEvent,
                                           nsIView* aView, nsEventStatus *aStatus)
{
  NS_ASSERTION(!aView || static_cast<nsView*>(aView)->GetViewManager() == this,
               "wrong view manager");

  SAMPLE_LABEL("event", "nsViewManager::DispatchEvent");

  *aStatus = nsEventStatus_eIgnore;

  switch(aEvent->message)
    {
    case NS_SIZE:
      {
        if (aView)
          {
            // client area dimensions are set on the view
            nscoord width = ((nsSizeEvent*)aEvent)->windowSize->width;
            nscoord height = ((nsSizeEvent*)aEvent)->windowSize->height;

            // The root view may not be set if this is the resize associated with
            // window creation

            if (aView == mRootView)
              {
                PRInt32 p2a = AppUnitsPerDevPixel();
                SetWindowDimensions(NSIntPixelsToAppUnits(width, p2a),
                                    NSIntPixelsToAppUnits(height, p2a));
                *aStatus = nsEventStatus_eConsumeNoDefault;
              }
            else if (IsViewForPopup(aView))
              {
                nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
                if (pm)
                  {
                    pm->PopupResized(aView->GetFrame(), nsIntSize(width, height));
                    *aStatus = nsEventStatus_eConsumeNoDefault;
                  }
              }
          }
        }

        break;

    case NS_MOVE:
      {
        // A popup's parent view is the root view for the parent window, so when
        // a popup moves, the popup's frame and view position must be updated
        // to match.
        if (aView && IsViewForPopup(aView))
          {
            nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
            if (pm)
              {
                pm->PopupMoved(aView->GetFrame(), aEvent->refPoint);
                *aStatus = nsEventStatus_eConsumeNoDefault;
              }
          }
        break;
      }

    case NS_DONESIZEMOVE:
      {
        if (mPresShell) {
          nsPresContext* presContext = mPresShell->GetPresContext();
          if (presContext) {
            nsEventStateManager::ClearGlobalActiveContent(nsnull);
          }

        }

        nsIPresShell::ClearMouseCapture(nsnull);
      }
      break;
  
    case NS_XUL_CLOSE:
      {
        // if this is a popup, make a request to hide it. Note that a popuphidden
        // event listener may cancel the event and the popup will not be hidden.
        nsIWidget* widget = aView->GetWidget();
        if (widget) {
          nsWindowType type;
          widget->GetWindowType(type);
          if (type == eWindowType_popup) {
            nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
            if (pm) {
              pm->HidePopup(aView->GetFrame());
              *aStatus = nsEventStatus_eConsumeNoDefault;
            }
          }
        }
      }
      break;

    case NS_WILL_PAINT:
      {
        if (!aView || !mContext)
          break;

        *aStatus = nsEventStatus_eConsumeNoDefault;

        nsPaintEvent *event = static_cast<nsPaintEvent*>(aEvent);

        NS_ASSERTION(static_cast<nsView*>(aView) ==
                       nsView::GetViewFor(event->widget),
                     "view/widget mismatch");

        // If an ancestor widget was hidden and then shown, we could
        // have a delayed resize to handle.
        for (nsViewManager *vm = this; vm;
             vm = vm->mRootView->GetParent()
                    ? vm->mRootView->GetParent()->GetViewManager()
                    : nsnull) {
          if (vm->mDelayedResize != nsSize(NSCOORD_NONE, NSCOORD_NONE) &&
              vm->mRootView->IsEffectivelyVisible() &&
              mPresShell && mPresShell->IsVisible()) {
            vm->FlushDelayedResize(true);
            vm->InvalidateView(vm->mRootView);
          }
        }

        // Flush things like reflows and plugin widget geometry updates by
        // calling WillPaint on observer presShells.
        nsRefPtr<nsViewManager> rootVM = RootViewManager();
        if (mPresShell) {
          rootVM->CallWillPaintOnObservers(event->willSendDidPaint);
        }
        // Flush view widget geometry updates and invalidations.
        rootVM->ProcessPendingUpdates();
      }
      break;

    case NS_PAINT:
      {
        if (!aView || !mContext)
          break;

        *aStatus = nsEventStatus_eConsumeNoDefault;
        nsPaintEvent *event = static_cast<nsPaintEvent*>(aEvent);
        nsView* view = static_cast<nsView*>(aView);
        NS_ASSERTION(view == nsView::GetViewFor(event->widget),
                     "view/widget mismatch");
        NS_ASSERTION(IsPaintingAllowed(),
                     "shouldn't be receiving paint events while painting is "
                     "disallowed!");

        if (!event->didSendWillPaint) {
          // Send NS_WILL_PAINT event ourselves.
          nsPaintEvent willPaintEvent(true, NS_WILL_PAINT, event->widget);
          willPaintEvent.willSendDidPaint = event->willSendDidPaint;
          DispatchEvent(&willPaintEvent, view, aStatus);

          // Get the view pointer again since NS_WILL_PAINT might have
          // destroyed it during CallWillPaintOnObservers (bug 378273).
          view = nsView::GetViewFor(event->widget);
        }

        if (!view || event->region.IsEmpty())
          break;

        // Paint.
        Refresh(view, event->region, event->willSendDidPaint);

        break;
      }

    case NS_DID_PAINT: {
      nsRefPtr<nsViewManager> rootVM = RootViewManager();
      rootVM->CallDidPaintOnObserver();
      break;
    }

    case NS_CREATE:
    case NS_DESTROY:
    case NS_SETZLEVEL:
      /* Don't pass these events through. Passing them through
         causes performance problems on pages with lots of views/frames 
         @see bug 112861 */
      *aStatus = nsEventStatus_eConsumeNoDefault;
      break;

    case NS_DISPLAYCHANGED:

      //Destroy the cached backbuffer to force a new backbuffer
      //be constructed with the appropriate display depth.
      //@see bugzilla bug 6061
      *aStatus = nsEventStatus_eConsumeDoDefault;
      break;

    case NS_SYSCOLORCHANGED:
      {
        if (mPresShell) {
          // Hold a refcount to the presshell. The continued existence of the observer will
          // delay deletion of this view hierarchy should the event want to cause its
          // destruction in, say, some JavaScript event handler.
          nsCOMPtr<nsIPresShell> presShell = mPresShell;
          presShell->HandleEvent(aView->GetFrame(), aEvent, false, aStatus);
        }
      }
      break; 

    default:
      {
        if ((NS_IS_MOUSE_EVENT(aEvent) &&
             // Ignore mouse events that we synthesize.
             static_cast<nsMouseEvent*>(aEvent)->reason ==
               nsMouseEvent::eReal &&
             // Ignore mouse exit and enter (we'll get moves if the user
             // is really moving the mouse) since we get them when we
             // create and destroy widgets.
             aEvent->message != NS_MOUSE_EXIT &&
             aEvent->message != NS_MOUSE_ENTER) ||
            NS_IS_KEY_EVENT(aEvent) ||
            NS_IS_IME_EVENT(aEvent) ||
            aEvent->message == NS_PLUGIN_INPUT_EVENT) {
          gLastUserEventTime = PR_IntervalToMicroseconds(PR_IntervalNow());
        }

        if (aEvent->message == NS_DEACTIVATE) {
          // if a window is deactivated, clear the mouse capture regardless
          // of what is capturing
          nsIPresShell::ClearMouseCapture(nsnull);
        }

        // Find the view whose coordinates system we're in.
        nsIView* view = aView;
        bool dispatchUsingCoordinates = NS_IsEventUsingCoordinates(aEvent);
        if (dispatchUsingCoordinates) {
          // Will dispatch using coordinates. Pretty bogus but it's consistent
          // with what presshell does.
          view = GetDisplayRootFor(view);
        }
  
        // If the view has no frame, look for a view that does.
        nsIFrame* frame = view->GetFrame();
        if (!frame &&
            (dispatchUsingCoordinates || NS_IS_KEY_EVENT(aEvent) ||
             NS_IS_IME_RELATED_EVENT(aEvent) ||
             NS_IS_NON_RETARGETED_PLUGIN_EVENT(aEvent) ||
             aEvent->message == NS_PLUGIN_ACTIVATE ||
             aEvent->message == NS_PLUGIN_FOCUS)) {
          while (view && !view->GetFrame()) {
            view = view->GetParent();
          }

          if (view) {
            frame = view->GetFrame();
          }
        }

        if (nsnull != frame) {
          // Hold a refcount to the presshell. The continued existence of the
          // presshell will delay deletion of this view hierarchy should the event
          // want to cause its destruction in, say, some JavaScript event handler.
          nsCOMPtr<nsIPresShell> shell = view->GetViewManager()->GetPresShell();
          if (shell) {
            shell->HandleEvent(frame, aEvent, false, aStatus);
          }
        }
    
        break;
      }
    }

  return NS_OK;
}