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();
+}