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       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "nsCOMPtr.h"
       7             : #include "nsTitleBarFrame.h"
       8             : #include "nsIContent.h"
       9             : #include "nsIDocument.h"
      10             : #include "nsIDOMNodeList.h"
      11             : #include "nsGkAtoms.h"
      12             : #include "nsIWidget.h"
      13             : #include "nsMenuPopupFrame.h"
      14             : #include "nsPresContext.h"
      15             : #include "nsIDocShell.h"
      16             : #include "nsPIDOMWindow.h"
      17             : #include "nsDisplayList.h"
      18             : #include "nsContentUtils.h"
      19             : #include "mozilla/MouseEvents.h"
      20             : 
      21             : using namespace mozilla;
      22             : 
      23             : //
      24             : // NS_NewTitleBarFrame
      25             : //
      26             : // Creates a new TitleBar frame and returns it
      27             : //
      28             : nsIFrame*
      29           0 : NS_NewTitleBarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
      30             : {
      31           0 :   return new (aPresShell) nsTitleBarFrame(aContext);
      32             : }
      33             : 
      34           0 : NS_IMPL_FRAMEARENA_HELPERS(nsTitleBarFrame)
      35             : 
      36           0 : nsTitleBarFrame::nsTitleBarFrame(nsStyleContext* aContext, ClassID aID)
      37           0 :   : nsBoxFrame(aContext, aID, false)
      38             : {
      39           0 :   mTrackingMouseMove = false;
      40           0 :   UpdateMouseThrough();
      41           0 : }
      42             : 
      43             : void
      44           0 : nsTitleBarFrame::BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
      45             :                                              const nsRect&           aDirtyRect,
      46             :                                              const nsDisplayListSet& aLists)
      47             : {
      48             :   // override, since we don't want children to get events
      49           0 :   if (aBuilder->IsForEventDelivery()) {
      50           0 :     if (!mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::allowevents,
      51             :                                nsGkAtoms::_true, eCaseMatters))
      52           0 :       return;
      53             :   }
      54           0 :   nsBoxFrame::BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
      55             : }
      56             : 
      57             : nsresult
      58           0 : nsTitleBarFrame::HandleEvent(nsPresContext* aPresContext,
      59             :                              WidgetGUIEvent* aEvent,
      60             :                              nsEventStatus* aEventStatus)
      61             : {
      62           0 :   NS_ENSURE_ARG_POINTER(aEventStatus);
      63           0 :   if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
      64           0 :     return NS_OK;
      65             :   }
      66             : 
      67           0 :   bool doDefault = true;
      68             : 
      69           0 :   switch (aEvent->mMessage) {
      70             : 
      71             :    case eMouseDown: {
      72           0 :        if (aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) {
      73             :          // titlebar has no effect in non-chrome shells
      74           0 :          nsCOMPtr<nsIDocShellTreeItem> dsti = aPresContext->GetDocShell();
      75           0 :          if (dsti) {
      76           0 :            if (dsti->ItemType() == nsIDocShellTreeItem::typeChrome) {
      77             :              // we're tracking.
      78           0 :              mTrackingMouseMove = true;
      79             : 
      80             :              // start capture.
      81           0 :              nsIPresShell::SetCapturingContent(GetContent(), CAPTURE_IGNOREALLOWED);
      82             : 
      83             :              // remember current mouse coordinates.
      84           0 :              mLastPoint = aEvent->mRefPoint;
      85             :            }
      86             :          }
      87             : 
      88           0 :          *aEventStatus = nsEventStatus_eConsumeNoDefault;
      89           0 :          doDefault = false;
      90             :        }
      91             :      }
      92           0 :      break;
      93             : 
      94             : 
      95             :    case eMouseUp: {
      96           0 :        if (mTrackingMouseMove &&
      97           0 :            aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) {
      98             :          // we're done tracking.
      99           0 :          mTrackingMouseMove = false;
     100             : 
     101             :          // end capture
     102           0 :          nsIPresShell::SetCapturingContent(nullptr, 0);
     103             : 
     104           0 :          *aEventStatus = nsEventStatus_eConsumeNoDefault;
     105           0 :          doDefault = false;
     106             :        }
     107             :      }
     108           0 :      break;
     109             : 
     110             :    case eMouseMove: {
     111           0 :        if(mTrackingMouseMove)
     112             :        {
     113           0 :          LayoutDeviceIntPoint nsMoveBy = aEvent->mRefPoint - mLastPoint;
     114             : 
     115           0 :          nsIFrame* parent = GetParent();
     116           0 :          while (parent) {
     117           0 :            nsMenuPopupFrame* popupFrame = do_QueryFrame(parent);
     118           0 :            if (popupFrame)
     119           0 :              break;
     120           0 :            parent = parent->GetParent();
     121             :          }
     122             : 
     123             :          // if the titlebar is in a popup, move the popup frame, otherwise
     124             :          // move the widget associated with the window
     125           0 :          if (parent) {
     126           0 :            nsMenuPopupFrame* menuPopupFrame = static_cast<nsMenuPopupFrame*>(parent);
     127           0 :            nsCOMPtr<nsIWidget> widget = menuPopupFrame->GetWidget();
     128           0 :            LayoutDeviceIntRect bounds = widget->GetScreenBounds();
     129             : 
     130           0 :            CSSPoint cssPos = (bounds.TopLeft() + nsMoveBy)
     131           0 :                            / aPresContext->CSSToDevPixelScale();
     132           0 :            menuPopupFrame->MoveTo(RoundedToInt(cssPos), false);
     133             :          }
     134             :          else {
     135           0 :            nsIPresShell* presShell = aPresContext->PresShell();
     136           0 :            nsPIDOMWindowOuter *window = presShell->GetDocument()->GetWindow();
     137           0 :            if (window) {
     138           0 :              window->MoveBy(nsMoveBy.x, nsMoveBy.y);
     139             :            }
     140             :          }
     141             : 
     142           0 :          *aEventStatus = nsEventStatus_eConsumeNoDefault;
     143             : 
     144           0 :          doDefault = false;
     145             :        }
     146             :      }
     147           0 :      break;
     148             : 
     149             :     case eMouseClick: {
     150           0 :       WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
     151           0 :       if (mouseEvent->IsLeftClickEvent()) {
     152           0 :         MouseClicked(mouseEvent);
     153             :       }
     154           0 :       break;
     155             :     }
     156             : 
     157             :     default:
     158           0 :       break;
     159             :   }
     160             : 
     161           0 :   if ( doDefault )
     162           0 :     return nsBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
     163             :   else
     164           0 :     return NS_OK;
     165             : }
     166             : 
     167             : void
     168           0 : nsTitleBarFrame::MouseClicked(WidgetMouseEvent* aEvent)
     169             : {
     170             :   // Execute the oncommand event handler.
     171           0 :   nsContentUtils::DispatchXULCommand(mContent, aEvent && aEvent->IsTrusted());
     172           0 : }