412 lines
12 KiB
C++
412 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "EventListenerService.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventListenerManager.h"
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#include "mozilla/JSEventHandler.h"
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#include "mozilla/Maybe.h"
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#include "nsCOMArray.h"
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#include "nsDOMClassInfoID.h"
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#include "nsIXPConnect.h"
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#include "nsJSUtils.h"
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#include "nsMemory.h"
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#include "nsServiceManagerUtils.h"
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#include "nsArray.h"
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#include "nsThreadUtils.h"
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namespace mozilla {
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using namespace dom;
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/******************************************************************************
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* mozilla::EventListenerChange
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******************************************************************************/
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NS_IMPL_ISUPPORTS(EventListenerChange, nsIEventListenerChange)
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EventListenerChange::~EventListenerChange()
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{
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}
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EventListenerChange::EventListenerChange(dom::EventTarget* aTarget) :
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mTarget(aTarget)
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{
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mChangedListenerNames = nsArrayBase::Create();
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}
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void
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EventListenerChange::AddChangedListenerName(nsIAtom* aEventName)
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{
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mChangedListenerNames->AppendElement(aEventName, false);
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}
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NS_IMETHODIMP
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EventListenerChange::GetTarget(nsIDOMEventTarget** aTarget)
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{
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NS_ENSURE_ARG_POINTER(aTarget);
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NS_ADDREF(*aTarget = mTarget);
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerChange::GetChangedListenerNames(nsIArray** aEventNames)
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{
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NS_ENSURE_ARG_POINTER(aEventNames);
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NS_ADDREF(*aEventNames = mChangedListenerNames);
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return NS_OK;
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}
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/******************************************************************************
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* mozilla::EventListenerInfo
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******************************************************************************/
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NS_IMPL_CYCLE_COLLECTION(EventListenerInfo, mListener)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EventListenerInfo)
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NS_INTERFACE_MAP_ENTRY(nsIEventListenerInfo)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(EventListenerInfo)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(EventListenerInfo)
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NS_IMETHODIMP
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EventListenerInfo::GetType(nsAString& aType)
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{
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aType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerInfo::GetCapturing(bool* aCapturing)
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{
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*aCapturing = mCapturing;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerInfo::GetAllowsUntrusted(bool* aAllowsUntrusted)
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{
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*aAllowsUntrusted = mAllowsUntrusted;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerInfo::GetInSystemEventGroup(bool* aInSystemEventGroup)
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{
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*aInSystemEventGroup = mInSystemEventGroup;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerInfo::GetListenerObject(JSContext* aCx,
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JS::MutableHandle<JS::Value> aObject)
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{
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Maybe<JSAutoCompartment> ac;
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GetJSVal(aCx, ac, aObject);
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return NS_OK;
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}
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/******************************************************************************
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* mozilla::EventListenerService
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******************************************************************************/
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NS_IMPL_ISUPPORTS(EventListenerService, nsIEventListenerService)
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bool
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EventListenerInfo::GetJSVal(JSContext* aCx,
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Maybe<JSAutoCompartment>& aAc,
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JS::MutableHandle<JS::Value> aJSVal)
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{
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aJSVal.setNull();
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nsCOMPtr<nsIXPConnectWrappedJS> wrappedJS = do_QueryInterface(mListener);
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if (wrappedJS) {
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JS::Rooted<JSObject*> object(aCx, wrappedJS->GetJSObject());
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if (!object) {
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return false;
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}
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aAc.emplace(aCx, object);
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aJSVal.setObject(*object);
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return true;
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}
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nsCOMPtr<JSEventHandler> jsHandler = do_QueryInterface(mListener);
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if (jsHandler && jsHandler->GetTypedEventHandler().HasEventHandler()) {
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JS::Handle<JSObject*> handler =
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jsHandler->GetTypedEventHandler().Ptr()->Callable();
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if (handler) {
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aAc.emplace(aCx, handler);
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aJSVal.setObject(*handler);
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return true;
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}
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}
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return false;
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}
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NS_IMETHODIMP
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EventListenerInfo::ToSource(nsAString& aResult)
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{
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aResult.SetIsVoid(true);
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AutoSafeJSContext cx;
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Maybe<JSAutoCompartment> ac;
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JS::Rooted<JS::Value> v(cx);
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if (GetJSVal(cx, ac, &v)) {
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JSString* str = JS_ValueToSource(cx, v);
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if (str) {
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nsAutoJSString autoStr;
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if (autoStr.init(cx, str)) {
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aResult.Assign(autoStr);
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}
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}
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}
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return NS_OK;
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}
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EventListenerService*
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EventListenerService::sInstance = nullptr;
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EventListenerService::EventListenerService()
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{
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MOZ_ASSERT(!sInstance);
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sInstance = this;
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}
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EventListenerService::~EventListenerService()
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{
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MOZ_ASSERT(sInstance == this);
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sInstance = nullptr;
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}
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NS_IMETHODIMP
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EventListenerService::GetListenerInfoFor(nsIDOMEventTarget* aEventTarget,
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uint32_t* aCount,
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nsIEventListenerInfo*** aOutArray)
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{
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NS_ENSURE_ARG_POINTER(aEventTarget);
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*aCount = 0;
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*aOutArray = nullptr;
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nsCOMArray<nsIEventListenerInfo> listenerInfos;
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aEventTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* elm = eventTarget->GetExistingListenerManager();
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if (elm) {
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elm->GetListenerInfo(&listenerInfos);
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}
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int32_t count = listenerInfos.Count();
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if (count == 0) {
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return NS_OK;
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}
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*aOutArray =
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static_cast<nsIEventListenerInfo**>(
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moz_xmalloc(sizeof(nsIEventListenerInfo*) * count));
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NS_ENSURE_TRUE(*aOutArray, NS_ERROR_OUT_OF_MEMORY);
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for (int32_t i = 0; i < count; ++i) {
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NS_ADDREF((*aOutArray)[i] = listenerInfos[i]);
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}
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*aCount = count;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::GetEventTargetChainFor(nsIDOMEventTarget* aEventTarget,
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bool aComposed,
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uint32_t* aCount,
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nsIDOMEventTarget*** aOutArray)
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{
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*aCount = 0;
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*aOutArray = nullptr;
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NS_ENSURE_ARG(aEventTarget);
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WidgetEvent event(true, eVoidEvent);
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event.SetComposed(aComposed);
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nsTArray<EventTarget*> targets;
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nsresult rv = EventDispatcher::Dispatch(aEventTarget, nullptr, &event,
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nullptr, nullptr, nullptr, &targets);
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NS_ENSURE_SUCCESS(rv, rv);
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int32_t count = targets.Length();
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if (count == 0) {
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return NS_OK;
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}
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*aOutArray =
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static_cast<nsIDOMEventTarget**>(
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moz_xmalloc(sizeof(nsIDOMEventTarget*) * count));
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NS_ENSURE_TRUE(*aOutArray, NS_ERROR_OUT_OF_MEMORY);
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for (int32_t i = 0; i < count; ++i) {
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NS_ADDREF((*aOutArray)[i] = targets[i]);
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}
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*aCount = count;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::HasListenersFor(nsIDOMEventTarget* aEventTarget,
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const nsAString& aType,
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bool* aRetVal)
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{
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aEventTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* elm = eventTarget->GetExistingListenerManager();
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*aRetVal = elm && elm->HasListenersFor(aType);
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::AddSystemEventListener(nsIDOMEventTarget *aTarget,
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const nsAString& aType,
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nsIDOMEventListener* aListener,
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bool aUseCapture)
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{
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NS_PRECONDITION(aTarget, "Missing target");
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NS_PRECONDITION(aListener, "Missing listener");
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* manager = eventTarget->GetOrCreateListenerManager();
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NS_ENSURE_STATE(manager);
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EventListenerFlags flags =
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aUseCapture ? TrustedEventsAtSystemGroupCapture() :
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TrustedEventsAtSystemGroupBubble();
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manager->AddEventListenerByType(aListener, aType, flags);
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::RemoveSystemEventListener(nsIDOMEventTarget *aTarget,
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const nsAString& aType,
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nsIDOMEventListener* aListener,
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bool aUseCapture)
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{
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NS_PRECONDITION(aTarget, "Missing target");
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NS_PRECONDITION(aListener, "Missing listener");
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* manager = eventTarget->GetExistingListenerManager();
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if (manager) {
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EventListenerFlags flags =
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aUseCapture ? TrustedEventsAtSystemGroupCapture() :
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TrustedEventsAtSystemGroupBubble();
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manager->RemoveEventListenerByType(aListener, aType, flags);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::AddListenerForAllEvents(nsIDOMEventTarget* aTarget,
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nsIDOMEventListener* aListener,
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bool aUseCapture,
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bool aWantsUntrusted,
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bool aSystemEventGroup)
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{
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NS_ENSURE_STATE(aTarget && aListener);
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* manager = eventTarget->GetOrCreateListenerManager();
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NS_ENSURE_STATE(manager);
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manager->AddListenerForAllEvents(aListener, aUseCapture, aWantsUntrusted,
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aSystemEventGroup);
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::RemoveListenerForAllEvents(nsIDOMEventTarget* aTarget,
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nsIDOMEventListener* aListener,
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bool aUseCapture,
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bool aSystemEventGroup)
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{
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NS_ENSURE_STATE(aTarget && aListener);
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nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(aTarget);
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NS_ENSURE_TRUE(eventTarget, NS_ERROR_NO_INTERFACE);
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EventListenerManager* manager = eventTarget->GetExistingListenerManager();
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if (manager) {
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manager->RemoveListenerForAllEvents(aListener, aUseCapture, aSystemEventGroup);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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EventListenerService::AddListenerChangeListener(nsIListenerChangeListener* aListener)
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{
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if (!mChangeListeners.Contains(aListener)) {
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mChangeListeners.AppendElement(aListener);
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}
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return NS_OK;
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};
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NS_IMETHODIMP
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EventListenerService::RemoveListenerChangeListener(nsIListenerChangeListener* aListener)
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{
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mChangeListeners.RemoveElement(aListener);
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return NS_OK;
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};
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void
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EventListenerService::NotifyAboutMainThreadListenerChangeInternal(dom::EventTarget* aTarget,
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nsIAtom* aName)
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (mChangeListeners.IsEmpty()) {
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return;
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}
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if (!mPendingListenerChanges) {
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mPendingListenerChanges = nsArrayBase::Create();
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NS_DispatchToCurrentThread(NewRunnableMethod(this,
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&EventListenerService::NotifyPendingChanges));
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}
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RefPtr<EventListenerChange> changes = mPendingListenerChangesSet.Get(aTarget);
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if (!changes) {
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changes = new EventListenerChange(aTarget);
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mPendingListenerChanges->AppendElement(changes, false);
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mPendingListenerChangesSet.Put(aTarget, changes);
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}
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changes->AddChangedListenerName(aName);
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}
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void
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EventListenerService::NotifyPendingChanges()
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{
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nsCOMPtr<nsIMutableArray> changes;
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mPendingListenerChanges.swap(changes);
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mPendingListenerChangesSet.Clear();
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nsTObserverArray<nsCOMPtr<nsIListenerChangeListener>>::EndLimitedIterator
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iter(mChangeListeners);
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while (iter.HasMore()) {
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nsCOMPtr<nsIListenerChangeListener> listener = iter.GetNext();
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listener->ListenersChanged(changes);
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}
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}
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} // namespace mozilla
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nsresult
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NS_NewEventListenerService(nsIEventListenerService** aResult)
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{
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*aResult = new mozilla::EventListenerService();
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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