content/events/src/nsDOMMouseScrollEvent.cpp

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  15  * The Original Code is mozilla.org code.
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  17  * The Initial Developer of the Original Code is
  18  * Markus Stange <mstange@themasta.com>
  19  * Portions created by the Initial Developer are Copyright (C) 2008
  20  * the Initial Developer. All Rights Reserved.
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  37
  38 #include "nsDOMMouseScrollEvent.h"
  39 #include "nsGUIEvent.h"
  40 #include "nsIContent.h"
  41 #include "nsIEventStateManager.h"
  42 #include "nsContentUtils.h"
  43
  44 nsDOMMouseScrollEvent::nsDOMMouseScrollEvent(nsPresContext* aPresContext,
  45                                              nsInputEvent* aEvent)
  46   : nsDOMMouseEvent(aPresContext, aEvent ? aEvent :
  47                                   new nsMouseScrollEvent(PR_FALSE, 0, nsnull))
  48 {
  49   if(mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
  50     nsMouseScrollEvent* mouseEvent = static_cast<nsMouseScrollEvent*>(mEvent);
  51     mDetail = mouseEvent->delta;
  52   }
  53 }
  54
  55 nsDOMMouseScrollEvent::~nsDOMMouseScrollEvent()
  56 {
  57   if (mEventIsInternal && mEvent) {
  58     switch (mEvent->eventStructType)
  59     {
  60       case NS_MOUSE_SCROLL_EVENT:
  61         delete static_cast<nsMouseScrollEvent*>(mEvent);
  62         break;
  63       default:
  64         delete mEvent;
  65         break;
  66     }
  67     mEvent = nsnull;
  68   }
  69 }
  70
  71 NS_IMPL_ADDREF_INHERITED(nsDOMMouseScrollEvent, nsDOMMouseEvent)
  72 NS_IMPL_RELEASE_INHERITED(nsDOMMouseScrollEvent, nsDOMMouseEvent)
  73
  74 NS_INTERFACE_MAP_BEGIN(nsDOMMouseScrollEvent)
  75   NS_INTERFACE_MAP_ENTRY(nsIDOMMouseScrollEvent)
  76   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(MouseScrollEvent)
  77 NS_INTERFACE_MAP_END_INHERITING(nsDOMMouseEvent)
  78
  79 NS_IMETHODIMP
  80 nsDOMMouseScrollEvent::InitMouseScrollEvent(const nsAString & aType, PRBool aCanBubble, PRBool aCancelable,
  81                                 nsIDOMAbstractView *aView, PRInt32 aDetail, PRInt32 aScreenX,
  82                                 PRInt32 aScreenY, PRInt32 aClientX, PRInt32 aClientY,
  83                                 PRBool aCtrlKey, PRBool aAltKey, PRBool aShiftKey,
  84                                 PRBool aMetaKey, PRUint16 aButton, nsIDOMEventTarget *aRelatedTarget,
  85                                 PRInt32 aAxis)
  86 {
  87   nsresult rv = nsDOMMouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
  88                                                 aScreenX, aScreenY, aClientX, aClientY, aCtrlKey,
  89                                                 aAltKey, aShiftKey, aMetaKey, aButton, aRelatedTarget);
  90   NS_ENSURE_SUCCESS(rv, rv);
  91
  92   if (mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
  93     static_cast<nsMouseScrollEvent*>(mEvent)->scrollFlags =
  94         (aAxis == HORIZONTAL_AXIS) ? nsMouseScrollEvent::kIsHorizontal
  95                                    : nsMouseScrollEvent::kIsVertical;
  96   }
  97
  98   return NS_OK;
  99 }
 100
 101
 102 NS_IMETHODIMP
 103 nsDOMMouseScrollEvent::GetAxis(PRInt32* aResult)
 104 {
 105   NS_ENSURE_ARG_POINTER(aResult);
 106
 107   if (mEvent->eventStructType == NS_MOUSE_SCROLL_EVENT) {
 108     PRUint32 flags = static_cast<nsMouseScrollEvent*>(mEvent)->scrollFlags;
 109     *aResult = (flags & nsMouseScrollEvent::kIsHorizontal)
 110          ? PRInt32(HORIZONTAL_AXIS) : PRInt32(VERTICAL_AXIS);
 111   } else {
 112     *aResult = 0;
 113   }
 114   return NS_OK;
 115 }
 116
 117 nsresult NS_NewDOMMouseScrollEvent(nsIDOMEvent** aInstancePtrResult,
 118                                    nsPresContext* aPresContext,
 119                                    nsInputEvent *aEvent)
 120 {
 121   nsDOMMouseScrollEvent* it = new nsDOMMouseScrollEvent(aPresContext, aEvent);
 122   if (nsnull == it) {
 123     return NS_ERROR_OUT_OF_MEMORY;
 124   }
 125
 126   return CallQueryInterface(it, aInstancePtrResult);
 127 }