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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* 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 "nsJSInspector.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/SpinEventLoopUntil.h"
#include "mozilla/dom/ScriptSettings.h"
#include "nsTArray.h"
#define JSINSPECTOR_CONTRACTID "@mozilla.org/jsinspector;1"
#define JSINSPECTOR_CID \
{ \
0xec5aa99c, 0x7abb, 0x4142, { \
0xac, 0x5f, 0xaa, 0xb2, 0x41, 0x9e, 0x38, 0xe2 \
} \
}
namespace mozilla {
namespace jsinspector {
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsJSInspector)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIJSInspector)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_CLASS(nsJSInspector)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsJSInspector)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsJSInspector)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsJSInspector)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsJSInspector)
tmp->mRequestors.Clear();
tmp->mLastRequestor = JS::NullValue();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsJSInspector)
for (uint32_t i = 0; i < tmp->mRequestors.Length(); ++i) {
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mRequestors[i])
}
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mLastRequestor)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
nsJSInspector::nsJSInspector()
: mNestedLoopLevel(0), mRequestors(1), mLastRequestor(JS::NullValue()) {}
nsJSInspector::~nsJSInspector() {
MOZ_ASSERT(mRequestors.Length() == 0);
MOZ_ASSERT(mLastRequestor.isNull());
mozilla::DropJSObjects(this);
}
NS_IMETHODIMP
nsJSInspector::EnterNestedEventLoop(JS::Handle<JS::Value> requestor,
uint32_t* out) {
nsresult rv = NS_OK;
mLastRequestor = requestor;
mRequestors.AppendElement(requestor);
mozilla::HoldJSObjects(this);
mozilla::dom::AutoNoJSAPI nojsapi;
uint32_t nestLevel = ++mNestedLoopLevel;
if (!SpinEventLoopUntil("nsJSInspector::EnterNestedEventLoop"_ns,
[&]() { return mNestedLoopLevel < nestLevel; })) {
rv = NS_ERROR_UNEXPECTED;
}
NS_ASSERTION(mNestedLoopLevel <= nestLevel,
"nested event didn't unwind properly");
if (mNestedLoopLevel == nestLevel) {
mLastRequestor = mRequestors.ElementAt(--mNestedLoopLevel);
}
*out = mNestedLoopLevel;
return rv;
}
NS_IMETHODIMP
nsJSInspector::ExitNestedEventLoop(uint32_t* out) {
if (mNestedLoopLevel > 0) {
mRequestors.RemoveElementAt(--mNestedLoopLevel);
if (mNestedLoopLevel > 0)
mLastRequestor = mRequestors.ElementAt(mNestedLoopLevel - 1);
else
mLastRequestor = JS::NullValue();
} else {
return NS_ERROR_FAILURE;
}
*out = mNestedLoopLevel;
return NS_OK;
}
NS_IMETHODIMP
nsJSInspector::GetEventLoopNestLevel(uint32_t* out) {
*out = mNestedLoopLevel;
return NS_OK;
}
NS_IMETHODIMP
nsJSInspector::GetLastNestRequestor(JS::MutableHandle<JS::Value> out) {
out.set(mLastRequestor);
return NS_OK;
}
} // namespace jsinspector
} // namespace mozilla
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