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dom/events/DragEvent.cpp@b8a032363ba2 (annotated)

dom/events/DragEvent.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#include "mozilla/dom/DragEvent.h"
michael@0	7	#include "mozilla/MouseEvents.h"
michael@0	8	#include "nsContentUtils.h"
michael@0	9	#include "prtime.h"
michael@0	10
michael@0	11	namespace mozilla {
michael@0	12	namespace dom {
michael@0	13
michael@0	14	DragEvent::DragEvent(EventTarget* aOwner,
michael@0	15	nsPresContext* aPresContext,
michael@0	16	WidgetDragEvent* aEvent)
michael@0	17	: MouseEvent(aOwner, aPresContext,
michael@0	18	aEvent ? aEvent : new WidgetDragEvent(false, 0, nullptr))
michael@0	19	{
michael@0	20	if (aEvent) {
michael@0	21	mEventIsInternal = false;
michael@0	22	}
michael@0	23	else {
michael@0	24	mEventIsInternal = true;
michael@0	25	mEvent->time = PR_Now();
michael@0	26	mEvent->refPoint.x = mEvent->refPoint.y = 0;
michael@0	27	mEvent->AsMouseEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
michael@0	28	}
michael@0	29	}
michael@0	30
michael@0	31	NS_IMPL_ADDREF_INHERITED(DragEvent, MouseEvent)
michael@0	32	NS_IMPL_RELEASE_INHERITED(DragEvent, MouseEvent)
michael@0	33
michael@0	34	NS_INTERFACE_MAP_BEGIN(DragEvent)
michael@0	35	NS_INTERFACE_MAP_ENTRY(nsIDOMDragEvent)
michael@0	36	NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
michael@0	37
michael@0	38	void
michael@0	39	DragEvent::InitDragEvent(const nsAString& aType,
michael@0	40	bool aCanBubble,
michael@0	41	bool aCancelable,
michael@0	42	nsIDOMWindow* aView,
michael@0	43	int32_t aDetail,
michael@0	44	int32_t aScreenX,
michael@0	45	int32_t aScreenY,
michael@0	46	int32_t aClientX,
michael@0	47	int32_t aClientY,
michael@0	48	bool aCtrlKey,
michael@0	49	bool aAltKey,
michael@0	50	bool aShiftKey,
michael@0	51	bool aMetaKey,
michael@0	52	uint16_t aButton,
michael@0	53	EventTarget* aRelatedTarget,
michael@0	54	DataTransfer* aDataTransfer,
michael@0	55	ErrorResult& aError)
michael@0	56	{
michael@0	57	aError =
michael@0	58	MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
michael@0	59	aView, aDetail, aScreenX, aScreenY,
michael@0	60	aClientX, aClientY, aCtrlKey, aAltKey,
michael@0	61	aShiftKey, aMetaKey, aButton, aRelatedTarget);
michael@0	62	if (aError.Failed()) {
michael@0	63	return;
michael@0	64	}
michael@0	65
michael@0	66	if (mEventIsInternal && mEvent) {
michael@0	67	mEvent->AsDragEvent()->dataTransfer = aDataTransfer;
michael@0	68	}
michael@0	69	}
michael@0	70
michael@0	71	NS_IMETHODIMP
michael@0	72	DragEvent::InitDragEvent(const nsAString& aType,
michael@0	73	bool aCanBubble,
michael@0	74	bool aCancelable,
michael@0	75	nsIDOMWindow* aView,
michael@0	76	int32_t aDetail,
michael@0	77	int32_t aScreenX,
michael@0	78	int32_t aScreenY,
michael@0	79	int32_t aClientX,
michael@0	80	int32_t aClientY,
michael@0	81	bool aCtrlKey,
michael@0	82	bool aAltKey,
michael@0	83	bool aShiftKey,
michael@0	84	bool aMetaKey,
michael@0	85	uint16_t aButton,
michael@0	86	nsIDOMEventTarget* aRelatedTarget,
michael@0	87	nsIDOMDataTransfer* aDataTransfer)
michael@0	88	{
michael@0	89	nsCOMPtr<DataTransfer> dataTransfer = do_QueryInterface(aDataTransfer);
michael@0	90
michael@0	91	nsresult rv =
michael@0	92	MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
michael@0	93	aScreenX, aScreenY, aClientX, aClientY,
michael@0	94	aCtrlKey, aAltKey, aShiftKey, aMetaKey, aButton,
michael@0	95	aRelatedTarget);
michael@0	96	NS_ENSURE_SUCCESS(rv, rv);
michael@0	97
michael@0	98	if (mEventIsInternal && mEvent) {
michael@0	99	mEvent->AsDragEvent()->dataTransfer = dataTransfer;
michael@0	100	}
michael@0	101
michael@0	102	return NS_OK;
michael@0	103	}
michael@0	104
michael@0	105	NS_IMETHODIMP
michael@0	106	DragEvent::GetDataTransfer(nsIDOMDataTransfer** aDataTransfer)
michael@0	107	{
michael@0	108	NS_IF_ADDREF(*aDataTransfer = GetDataTransfer());
michael@0	109	return NS_OK;
michael@0	110	}
michael@0	111
michael@0	112	DataTransfer*
michael@0	113	DragEvent::GetDataTransfer()
michael@0	114	{
michael@0	115	// the dataTransfer field of the event caches the DataTransfer associated
michael@0	116	// with the drag. It is initialized when an attempt is made to retrieve it
michael@0	117	// rather that when the event is created to avoid duplicating the data when
michael@0	118	// no listener ever uses it.
michael@0	119	if (!mEvent || mEvent->eventStructType != NS_DRAG_EVENT) {
michael@0	120	NS_WARNING("Tried to get dataTransfer from non-drag event!");
michael@0	121	return nullptr;
michael@0	122	}
michael@0	123
michael@0	124	WidgetDragEvent* dragEvent = mEvent->AsDragEvent();
michael@0	125	// for synthetic events, just use the supplied data transfer object even if null
michael@0	126	if (!mEventIsInternal) {
michael@0	127	nsresult rv = nsContentUtils::SetDataTransferInEvent(dragEvent);
michael@0	128	NS_ENSURE_SUCCESS(rv, nullptr);
michael@0	129	}
michael@0	130
michael@0	131	return dragEvent->dataTransfer;
michael@0	132	}
michael@0	133
michael@0	134	} // namespace dom
michael@0	135	} // namespace mozilla
michael@0	136
michael@0	137	using namespace mozilla;
michael@0	138	using namespace mozilla::dom;
michael@0	139
michael@0	140	nsresult
michael@0	141	NS_NewDOMDragEvent(nsIDOMEvent** aInstancePtrResult,
michael@0	142	EventTarget* aOwner,
michael@0	143	nsPresContext* aPresContext,
michael@0	144	WidgetDragEvent* aEvent)
michael@0	145	{
michael@0	146	DragEvent* event = new DragEvent(aOwner, aPresContext, aEvent);
michael@0	147	return CallQueryInterface(event, aInstancePtrResult);
michael@0	148	}