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676913b9bb
MozReview-Commit-ID: 7lBCEVkanvF --HG-- extra : source : d629f018d02594951b7deccf1e1fce279d04694c
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DOMSVGPoint.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/SVGSVGElement.h"
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#include "mozilla/dom/SVGZoomEvent.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "prtime.h"
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namespace mozilla {
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namespace dom {
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//----------------------------------------------------------------------
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// Implementation
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NS_IMPL_CYCLE_COLLECTION_INHERITED(SVGZoomEvent, UIEvent, mPreviousTranslate, mNewTranslate)
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NS_IMPL_ADDREF_INHERITED(SVGZoomEvent, UIEvent)
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NS_IMPL_RELEASE_INHERITED(SVGZoomEvent, UIEvent)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGZoomEvent)
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NS_INTERFACE_MAP_END_INHERITING(UIEvent)
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SVGZoomEvent::SVGZoomEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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InternalSVGZoomEvent* aEvent)
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: UIEvent(aOwner, aPresContext,
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aEvent ? aEvent : new InternalSVGZoomEvent(false, eSVGZoom))
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, mPreviousScale(0)
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, mNewScale(0)
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{
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if (aEvent) {
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mEventIsInternal = false;
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}
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else {
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mEventIsInternal = true;
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mEvent->mTime = PR_Now();
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}
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// We must store the "Previous" and "New" values before this event is
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// dispatched. Reading the values from the root 'svg' element after we've
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// been dispatched is not an option since event handler code may change
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// currentScale and currentTranslate in response to this event.
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nsIPresShell *presShell;
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if (mPresContext && (presShell = mPresContext->GetPresShell())) {
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nsIDocument *doc = presShell->GetDocument();
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if (doc) {
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Element *rootElement = doc->GetRootElement();
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if (rootElement) {
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// If the root element isn't an SVG 'svg' element
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// (e.g. if this event was created by calling createEvent on a
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// non-SVGDocument), then the "New" and "Previous"
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// properties will be left null which is probably what we want.
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if (rootElement->IsSVGElement(nsGkAtoms::svg)) {
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SVGSVGElement *SVGSVGElem =
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static_cast<SVGSVGElement*>(rootElement);
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mNewScale = SVGSVGElem->GetCurrentScale();
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mPreviousScale = SVGSVGElem->GetPreviousScale();
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const SVGPoint& translate = SVGSVGElem->GetCurrentTranslate();
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mNewTranslate =
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new DOMSVGPoint(translate.GetX(), translate.GetY());
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mNewTranslate->SetReadonly(true);
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const SVGPoint& prevTranslate = SVGSVGElem->GetPreviousTranslate();
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mPreviousTranslate =
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new DOMSVGPoint(prevTranslate.GetX(), prevTranslate.GetY());
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mPreviousTranslate->SetReadonly(true);
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}
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}
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}
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}
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}
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SVGZoomEvent::~SVGZoomEvent()
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{
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}
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} // namespace dom
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} // namespace mozilla
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////////////////////////////////////////////////////////////////////////
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// Exported creation functions:
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using namespace mozilla;
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using namespace mozilla::dom;
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already_AddRefed<SVGZoomEvent>
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NS_NewDOMSVGZoomEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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mozilla::InternalSVGZoomEvent* aEvent)
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{
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RefPtr<SVGZoomEvent> it = new SVGZoomEvent(aOwner, aPresContext, aEvent);
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return it.forget();
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}
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