michael@0: /* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsJSInspector.h"
michael@0: #include "nsIXPConnect.h"
michael@0: #include "nsThreadUtils.h"
michael@0: #include "jsfriendapi.h"
michael@0: #include "js/OldDebugAPI.h"
michael@0: #include "mozilla/HoldDropJSObjects.h"
michael@0: #include "mozilla/ModuleUtils.h"
michael@0: #include "mozilla/dom/ScriptSettings.h"
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsMemory.h"
michael@0: #include "nsArray.h"
michael@0: #include "nsTArray.h"
michael@0: 
michael@0: #define JSINSPECTOR_CONTRACTID \
michael@0:   "@mozilla.org/jsinspector;1"
michael@0: 
michael@0: #define JSINSPECTOR_CID \
michael@0: { 0xec5aa99c, 0x7abb, 0x4142, { 0xac, 0x5f, 0xaa, 0xb2, 0x41, 0x9e, 0x38, 0xe2 } }
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace jsinspector {
michael@0: 
michael@0: NS_GENERIC_FACTORY_CONSTRUCTOR(nsJSInspector)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsJSInspector)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsISupports)
michael@0:   NS_INTERFACE_MAP_ENTRY(nsIJSInspector)
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CLASS(nsJSInspector)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(nsJSInspector)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(nsJSInspector)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsJSInspector)
michael@0:   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
michael@0: NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsJSInspector)
michael@0:   tmp->mRequestors.Clear();
michael@0:   tmp->mLastRequestor = JS::NullValue();
michael@0: NS_IMPL_CYCLE_COLLECTION_UNLINK_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsJSInspector)
michael@0:   for (uint32_t i = 0; i < tmp->mRequestors.Length(); ++i) {
michael@0:     NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mRequestors[i])
michael@0:   }
michael@0:   NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mLastRequestor)
michael@0: NS_IMPL_CYCLE_COLLECTION_TRACE_END
michael@0: 
michael@0: nsJSInspector::nsJSInspector() : mNestedLoopLevel(0), mRequestors(1), mLastRequestor(JSVAL_NULL)
michael@0: {
michael@0: }
michael@0: 
michael@0: nsJSInspector::~nsJSInspector()
michael@0: {
michael@0:   MOZ_ASSERT(mRequestors.Length() == 0);
michael@0:   MOZ_ASSERT(mLastRequestor.isNull());
michael@0:   mozilla::DropJSObjects(this);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsJSInspector::EnterNestedEventLoop(JS::Handle<JS::Value> requestor, uint32_t *out)
michael@0: {
michael@0:   nsresult rv = NS_OK;
michael@0: 
michael@0:   mLastRequestor = requestor;
michael@0:   mRequestors.AppendElement(requestor);
michael@0:   mozilla::HoldJSObjects(this);
michael@0: 
michael@0:   mozilla::dom::AutoNoJSAPI nojsapi;
michael@0: 
michael@0:   uint32_t nestLevel = ++mNestedLoopLevel;
michael@0:   while (NS_SUCCEEDED(rv) && mNestedLoopLevel >= nestLevel) {
michael@0:     if (!NS_ProcessNextEvent())
michael@0:       rv = NS_ERROR_UNEXPECTED;
michael@0:   }
michael@0: 
michael@0:   NS_ASSERTION(mNestedLoopLevel <= nestLevel,
michael@0:                "nested event didn't unwind properly");
michael@0: 
michael@0:   if (mNestedLoopLevel == nestLevel) {
michael@0:     mLastRequestor = mRequestors.ElementAt(--mNestedLoopLevel);
michael@0:   }
michael@0: 
michael@0:   *out = mNestedLoopLevel;
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsJSInspector::ExitNestedEventLoop(uint32_t *out)
michael@0: {
michael@0:   if (mNestedLoopLevel > 0) {
michael@0:     mRequestors.RemoveElementAt(--mNestedLoopLevel);
michael@0:     if (mNestedLoopLevel > 0)
michael@0:       mLastRequestor = mRequestors.ElementAt(mNestedLoopLevel - 1);
michael@0:     else
michael@0:       mLastRequestor = JSVAL_NULL;
michael@0:   } else {
michael@0:     return NS_ERROR_FAILURE;
michael@0:   }
michael@0: 
michael@0:   *out = mNestedLoopLevel;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsJSInspector::GetEventLoopNestLevel(uint32_t *out)
michael@0: {
michael@0:   *out = mNestedLoopLevel;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsJSInspector::GetLastNestRequestor(JS::MutableHandle<JS::Value> out)
michael@0: {
michael@0:   out.set(mLastRequestor);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: NS_DEFINE_NAMED_CID(JSINSPECTOR_CID);
michael@0: 
michael@0: static const mozilla::Module::CIDEntry kJSInspectorCIDs[] = {
michael@0:   { &kJSINSPECTOR_CID, false, nullptr, mozilla::jsinspector::nsJSInspectorConstructor },
michael@0:   { nullptr }
michael@0: };
michael@0: 
michael@0: static const mozilla::Module::ContractIDEntry kJSInspectorContracts[] = {
michael@0:   { JSINSPECTOR_CONTRACTID, &kJSINSPECTOR_CID },
michael@0:   { nullptr }
michael@0: };
michael@0: 
michael@0: static const mozilla::Module kJSInspectorModule = {
michael@0:   mozilla::Module::kVersion,
michael@0:   kJSInspectorCIDs,
michael@0:   kJSInspectorContracts
michael@0: };
michael@0: 
michael@0: NSMODULE_DEFN(jsinspector) = &kJSInspectorModule;