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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "DOMSVGPoint.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "mozilla/dom/SVGZoomEvent.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "prtime.h"
namespace mozilla {
namespace dom {
//----------------------------------------------------------------------
// Implementation
NS_IMPL_CYCLE_COLLECTION_INHERITED(SVGZoomEvent, UIEvent, mPreviousTranslate, mNewTranslate)
NS_IMPL_ADDREF_INHERITED(SVGZoomEvent, UIEvent)
NS_IMPL_RELEASE_INHERITED(SVGZoomEvent, UIEvent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGZoomEvent)
NS_INTERFACE_MAP_END_INHERITING(UIEvent)
SVGZoomEvent::SVGZoomEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
InternalSVGZoomEvent* aEvent)
: UIEvent(aOwner, aPresContext,
aEvent ? aEvent : new InternalSVGZoomEvent(false, eSVGZoom))
, mPreviousScale(0)
, mNewScale(0)
{
if (aEvent) {
mEventIsInternal = false;
}
else {
mEventIsInternal = true;
mEvent->mTime = PR_Now();
}
// We must store the "Previous" and "New" values before this event is
// dispatched. Reading the values from the root 'svg' element after we've
// been dispatched is not an option since event handler code may change
// currentScale and currentTranslate in response to this event.
nsIPresShell *presShell;
if (mPresContext && (presShell = mPresContext->GetPresShell())) {
nsIDocument *doc = presShell->GetDocument();
if (doc) {
Element *rootElement = doc->GetRootElement();
if (rootElement) {
// If the root element isn't an SVG 'svg' element
// (e.g. if this event was created by calling createEvent on a
// non-SVGDocument), then the "New" and "Previous"
// properties will be left null which is probably what we want.
if (rootElement->IsSVGElement(nsGkAtoms::svg)) {
SVGSVGElement *SVGSVGElem =
static_cast<SVGSVGElement*>(rootElement);
mNewScale = SVGSVGElem->GetCurrentScale();
mPreviousScale = SVGSVGElem->GetPreviousScale();
const SVGPoint& translate = SVGSVGElem->GetCurrentTranslate();
mNewTranslate =
new DOMSVGPoint(translate.GetX(), translate.GetY());
mNewTranslate->SetReadonly(true);
const SVGPoint& prevTranslate = SVGSVGElem->GetPreviousTranslate();
mPreviousTranslate =
new DOMSVGPoint(prevTranslate.GetX(), prevTranslate.GetY());
mPreviousTranslate->SetReadonly(true);
}
}
}
}
}
SVGZoomEvent::~SVGZoomEvent()
{
}
} // namespace dom
} // namespace mozilla
////////////////////////////////////////////////////////////////////////
// Exported creation functions:
using namespace mozilla;
using namespace mozilla::dom;
already_AddRefed<SVGZoomEvent>
NS_NewDOMSVGZoomEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
mozilla::InternalSVGZoomEvent* aEvent)
{
RefPtr<SVGZoomEvent> it = new SVGZoomEvent(aOwner, aPresContext, aEvent);
return it.forget();
}
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