/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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(); }