diff options
Diffstat (limited to 'dom/svg/SVGZoomEvent.cpp')
-rw-r--r-- | dom/svg/SVGZoomEvent.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/dom/svg/SVGZoomEvent.cpp b/dom/svg/SVGZoomEvent.cpp new file mode 100644 index 000000000..4856f2c38 --- /dev/null +++ b/dom/svg/SVGZoomEvent.cpp @@ -0,0 +1,103 @@ +/* -*- 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(); +} |