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/* -*- 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 "mozilla/dom/XRInputSourceArray.h"
#include "mozilla/dom/XRSession.h"
#include "mozilla/dom/XRInputSourcesChangeEvent.h"
#include "VRDisplayClient.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(XRInputSourceArray, mParent,
mInputSources)
NS_IMPL_CYCLE_COLLECTING_ADDREF(XRInputSourceArray)
NS_IMPL_CYCLE_COLLECTING_RELEASE(XRInputSourceArray)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(XRInputSourceArray)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
XRInputSourceArray::XRInputSourceArray(nsISupports* aParent)
: mParent(aParent) {}
JSObject* XRInputSourceArray::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return XRInputSourceArray_Binding::Wrap(aCx, this, aGivenProto);
}
void XRInputSourceArray::Update(XRSession* aSession) {
MOZ_ASSERT(aSession);
gfx::VRDisplayClient* displayClient = aSession->GetDisplayClient();
if (!displayClient) {
return;
}
XRInputSourcesChangeEventInit addInit;
nsTArray<RefPtr<XRInputSource>> removedInputs;
if (NS_WARN_IF(!addInit.mAdded.SetCapacity(gfx::kVRControllerMaxCount,
mozilla::fallible))) {
MOZ_ASSERT(false,
"'add' sequence in XRInputSourcesChangeEventInit SetCapacity() "
"failed.");
return;
}
for (int32_t i = 0; i < gfx::kVRControllerMaxCount; ++i) {
const gfx::VRControllerState& controllerState =
displayClient->GetDisplayInfo().mControllerState[i];
if (controllerState.controllerName[0] == '\0') {
// Checking if exising controllers need to be removed.
for (auto& input : mInputSources) {
if (input->GetIndex() == i) {
removedInputs.AppendElement(input);
break;
}
}
continue;
}
bool found = false;
RefPtr<XRInputSource> inputSource = nullptr;
for (auto& input : mInputSources) {
if (input->GetIndex() == i) {
found = true;
inputSource = input;
break;
}
}
// Checking if it is added before.
if (!found &&
(controllerState.numButtons > 0 || controllerState.numAxes > 0)) {
inputSource = new XRInputSource(mParent);
inputSource->Setup(aSession, i);
mInputSources.AppendElement(inputSource);
addInit.mBubbles = false;
addInit.mCancelable = false;
addInit.mSession = aSession;
if (!addInit.mAdded.AppendElement(*inputSource, mozilla::fallible)) {
MOZ_ASSERT(false,
"'add' sequence in XRInputSourcesChangeEventInit "
"AppendElement() failed, it might be due to the"
"wrong size when SetCapacity().");
}
}
// If added, updating the current controller states.
if (inputSource) {
inputSource->Update(aSession);
}
}
// Send `inputsourceschange` for new controllers.
if (addInit.mAdded.Length()) {
RefPtr<XRInputSourcesChangeEvent> event =
XRInputSourcesChangeEvent::Constructor(
aSession, u"inputsourceschange"_ns, addInit);
event->SetTrusted(true);
aSession->DispatchEvent(*event);
}
// If there's a controller is removed, dispatch `inputsourceschange`.
if (removedInputs.Length()) {
DispatchInputSourceRemovedEvent(removedInputs, aSession);
}
for (auto& input : removedInputs) {
mInputSources.RemoveElement(input);
}
}
void XRInputSourceArray::DispatchInputSourceRemovedEvent(
const nsTArray<RefPtr<XRInputSource>>& aInputs, XRSession* aSession) {
if (!aSession) {
return;
}
XRInputSourcesChangeEventInit init;
if (NS_WARN_IF(
!init.mRemoved.SetCapacity(aInputs.Length(), mozilla::fallible))) {
MOZ_ASSERT(false,
"'removed' sequence in XRInputSourcesChangeEventInit "
"SetCapacity() failed.");
return;
}
for (const auto& input : aInputs) {
input->SetGamepadIsConnected(false, aSession);
init.mBubbles = false;
init.mCancelable = false;
init.mSession = aSession;
if (!init.mRemoved.AppendElement(*input, mozilla::fallible)) {
MOZ_ASSERT(false,
"'removed' sequence in XRInputSourcesChangeEventInit "
"AppendElement() failed, it might be due to the"
"wrong size when SetCapacity().");
}
}
if (init.mRemoved.Length()) {
RefPtr<XRInputSourcesChangeEvent> event =
XRInputSourcesChangeEvent::Constructor(aSession,
u"inputsourceschange"_ns, init);
event->SetTrusted(true);
aSession->DispatchEvent(*event);
}
}
void XRInputSourceArray::Clear(XRSession* aSession) {
DispatchInputSourceRemovedEvent(mInputSources, aSession);
mInputSources.Clear();
}
uint32_t XRInputSourceArray::Length() { return mInputSources.Length(); }
XRInputSource* XRInputSourceArray::IndexedGetter(uint32_t aIndex,
bool& aFound) {
aFound = aIndex < mInputSources.Length();
if (!aFound) {
return nullptr;
}
return mInputSources[aIndex];
}
} // namespace mozilla::dom
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