1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/events/DragEvent.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,148 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/dom/DragEvent.h"
1.10 +#include "mozilla/MouseEvents.h"
1.11 +#include "nsContentUtils.h"
1.12 +#include "prtime.h"
1.13 +
1.14 +namespace mozilla {
1.15 +namespace dom {
1.16 +
1.17 +DragEvent::DragEvent(EventTarget* aOwner,
1.18 + nsPresContext* aPresContext,
1.19 + WidgetDragEvent* aEvent)
1.20 + : MouseEvent(aOwner, aPresContext,
1.21 + aEvent ? aEvent : new WidgetDragEvent(false, 0, nullptr))
1.22 +{
1.23 + if (aEvent) {
1.24 + mEventIsInternal = false;
1.25 + }
1.26 + else {
1.27 + mEventIsInternal = true;
1.28 + mEvent->time = PR_Now();
1.29 + mEvent->refPoint.x = mEvent->refPoint.y = 0;
1.30 + mEvent->AsMouseEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
1.31 + }
1.32 +}
1.33 +
1.34 +NS_IMPL_ADDREF_INHERITED(DragEvent, MouseEvent)
1.35 +NS_IMPL_RELEASE_INHERITED(DragEvent, MouseEvent)
1.36 +
1.37 +NS_INTERFACE_MAP_BEGIN(DragEvent)
1.38 + NS_INTERFACE_MAP_ENTRY(nsIDOMDragEvent)
1.39 +NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
1.40 +
1.41 +void
1.42 +DragEvent::InitDragEvent(const nsAString& aType,
1.43 + bool aCanBubble,
1.44 + bool aCancelable,
1.45 + nsIDOMWindow* aView,
1.46 + int32_t aDetail,
1.47 + int32_t aScreenX,
1.48 + int32_t aScreenY,
1.49 + int32_t aClientX,
1.50 + int32_t aClientY,
1.51 + bool aCtrlKey,
1.52 + bool aAltKey,
1.53 + bool aShiftKey,
1.54 + bool aMetaKey,
1.55 + uint16_t aButton,
1.56 + EventTarget* aRelatedTarget,
1.57 + DataTransfer* aDataTransfer,
1.58 + ErrorResult& aError)
1.59 +{
1.60 + aError =
1.61 + MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
1.62 + aView, aDetail, aScreenX, aScreenY,
1.63 + aClientX, aClientY, aCtrlKey, aAltKey,
1.64 + aShiftKey, aMetaKey, aButton, aRelatedTarget);
1.65 + if (aError.Failed()) {
1.66 + return;
1.67 + }
1.68 +
1.69 + if (mEventIsInternal && mEvent) {
1.70 + mEvent->AsDragEvent()->dataTransfer = aDataTransfer;
1.71 + }
1.72 +}
1.73 +
1.74 +NS_IMETHODIMP
1.75 +DragEvent::InitDragEvent(const nsAString& aType,
1.76 + bool aCanBubble,
1.77 + bool aCancelable,
1.78 + nsIDOMWindow* aView,
1.79 + int32_t aDetail,
1.80 + int32_t aScreenX,
1.81 + int32_t aScreenY,
1.82 + int32_t aClientX,
1.83 + int32_t aClientY,
1.84 + bool aCtrlKey,
1.85 + bool aAltKey,
1.86 + bool aShiftKey,
1.87 + bool aMetaKey,
1.88 + uint16_t aButton,
1.89 + nsIDOMEventTarget* aRelatedTarget,
1.90 + nsIDOMDataTransfer* aDataTransfer)
1.91 +{
1.92 + nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDataTransfer);
1.93 +
1.94 + nsresult rv =
1.95 + MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
1.96 + aScreenX, aScreenY, aClientX, aClientY,
1.97 + aCtrlKey, aAltKey, aShiftKey, aMetaKey, aButton,
1.98 + aRelatedTarget);
1.99 + NS_ENSURE_SUCCESS(rv, rv);
1.100 +
1.101 + if (mEventIsInternal && mEvent) {
1.102 + mEvent->AsDragEvent()->dataTransfer = dataTransfer;
1.103 + }
1.104 +
1.105 + return NS_OK;
1.106 +}
1.107 +
1.108 +NS_IMETHODIMP
1.109 +DragEvent::GetDataTransfer(nsIDOMDataTransfer** aDataTransfer)
1.110 +{
1.111 + NS_IF_ADDREF(*aDataTransfer = GetDataTransfer());
1.112 + return NS_OK;
1.113 +}
1.114 +
1.115 +DataTransfer*
1.116 +DragEvent::GetDataTransfer()
1.117 +{
1.118 + // the dataTransfer field of the event caches the DataTransfer associated
1.119 + // with the drag. It is initialized when an attempt is made to retrieve it
1.120 + // rather that when the event is created to avoid duplicating the data when
1.121 + // no listener ever uses it.
1.122 + if (!mEvent || mEvent->eventStructType != NS_DRAG_EVENT) {
1.123 + NS_WARNING("Tried to get dataTransfer from non-drag event!");
1.124 + return nullptr;
1.125 + }
1.126 +
1.127 + WidgetDragEvent* dragEvent = mEvent->AsDragEvent();
1.128 + // for synthetic events, just use the supplied data transfer object even if null
1.129 + if (!mEventIsInternal) {
1.130 + nsresult rv = nsContentUtils::SetDataTransferInEvent(dragEvent);
1.131 + NS_ENSURE_SUCCESS(rv, nullptr);
1.132 + }
1.133 +
1.134 + return dragEvent->dataTransfer;
1.135 +}
1.136 +
1.137 +} // namespace dom
1.138 +} // namespace mozilla
1.139 +
1.140 +using namespace mozilla;
1.141 +using namespace mozilla::dom;
1.142 +
1.143 +nsresult
1.144 +NS_NewDOMDragEvent(nsIDOMEvent** aInstancePtrResult,
1.145 + EventTarget* aOwner,
1.146 + nsPresContext* aPresContext,
1.147 + WidgetDragEvent* aEvent)
1.148 +{
1.149 + DragEvent* event = new DragEvent(aOwner, aPresContext, aEvent);
1.150 + return CallQueryInterface(event, aInstancePtrResult);
1.151 +}
