mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 20:47:44 +00:00
389 lines
14 KiB
C++
389 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
#ifndef nsJSEnvironment_h
|
|
#define nsJSEnvironment_h
|
|
|
|
#include "nsIScriptContext.h"
|
|
#include "nsIScriptRuntime.h"
|
|
#include "nsIScriptGlobalObject.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "jsapi.h"
|
|
#include "jsfriendapi.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsIXPCScriptNotify.h"
|
|
#include "prtime.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "nsIXPConnect.h"
|
|
#include "nsIArray.h"
|
|
|
|
class nsIXPConnectJSObjectHolder;
|
|
class nsRootedJSValueArray;
|
|
class nsScriptNameSpaceManager;
|
|
namespace mozilla {
|
|
template <class> class Maybe;
|
|
}
|
|
|
|
// The amount of time we wait between a request to GC (due to leaving
|
|
// a page) and doing the actual GC.
|
|
#define NS_GC_DELAY 4000 // ms
|
|
|
|
class nsJSContext : public nsIScriptContext,
|
|
public nsIXPCScriptNotify
|
|
{
|
|
public:
|
|
nsJSContext(JSRuntime *aRuntime);
|
|
virtual ~nsJSContext();
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsJSContext,
|
|
nsIScriptContext)
|
|
|
|
virtual nsIScriptObjectPrincipal* GetObjectPrincipal();
|
|
|
|
virtual void SetGlobalObject(nsIScriptGlobalObject* aGlobalObject)
|
|
{
|
|
mGlobalObjectRef = aGlobalObject;
|
|
}
|
|
|
|
virtual nsresult EvaluateString(const nsAString& aScript,
|
|
JSObject* aScopeObject,
|
|
nsIPrincipal *principal,
|
|
nsIPrincipal *originPrincipal,
|
|
const char *aURL,
|
|
PRUint32 aLineNo,
|
|
JSVersion aVersion,
|
|
nsAString *aRetValue,
|
|
bool* aIsUndefined);
|
|
virtual nsresult EvaluateStringWithValue(const nsAString& aScript,
|
|
JSObject* aScopeObject,
|
|
nsIPrincipal* aPrincipal,
|
|
const char* aURL,
|
|
PRUint32 aLineNo,
|
|
PRUint32 aVersion,
|
|
JS::Value* aRetValue,
|
|
bool* aIsUndefined);
|
|
|
|
virtual nsresult CompileScript(const PRUnichar* aText,
|
|
PRInt32 aTextLength,
|
|
nsIPrincipal *principal,
|
|
const char *aURL,
|
|
PRUint32 aLineNo,
|
|
PRUint32 aVersion,
|
|
nsScriptObjectHolder<JSScript>& aScriptObject);
|
|
virtual nsresult ExecuteScript(JSScript* aScriptObject,
|
|
JSObject* aScopeObject,
|
|
nsAString* aRetValue,
|
|
bool* aIsUndefined);
|
|
|
|
virtual nsresult CompileEventHandler(nsIAtom *aName,
|
|
PRUint32 aArgCount,
|
|
const char** aArgNames,
|
|
const nsAString& aBody,
|
|
const char *aURL, PRUint32 aLineNo,
|
|
PRUint32 aVersion,
|
|
nsScriptObjectHolder<JSObject>& aHandler);
|
|
virtual nsresult CallEventHandler(nsISupports* aTarget, JSObject* aScope,
|
|
JSObject* aHandler,
|
|
nsIArray *argv, nsIVariant **rv);
|
|
virtual nsresult BindCompiledEventHandler(nsISupports *aTarget,
|
|
JSObject *aScope,
|
|
JSObject* aHandler,
|
|
nsScriptObjectHolder<JSObject>& aBoundHandler);
|
|
virtual nsresult CompileFunction(JSObject* aTarget,
|
|
const nsACString& aName,
|
|
PRUint32 aArgCount,
|
|
const char** aArgArray,
|
|
const nsAString& aBody,
|
|
const char* aURL,
|
|
PRUint32 aLineNo,
|
|
PRUint32 aVersion,
|
|
bool aShared,
|
|
JSObject** aFunctionObject);
|
|
|
|
virtual nsIScriptGlobalObject *GetGlobalObject();
|
|
inline nsIScriptGlobalObject *GetGlobalObjectRef() { return mGlobalObjectRef; };
|
|
|
|
virtual JSContext* GetNativeContext();
|
|
virtual JSObject* GetNativeGlobal();
|
|
virtual nsresult CreateNativeGlobalForInner(
|
|
nsIScriptGlobalObject *aGlobal,
|
|
bool aIsChrome,
|
|
nsIPrincipal *aPrincipal,
|
|
JSObject** aNativeGlobal,
|
|
nsISupports **aHolder);
|
|
virtual nsresult InitContext();
|
|
virtual nsresult InitOuterWindow();
|
|
virtual bool IsContextInitialized();
|
|
|
|
virtual void ScriptEvaluated(bool aTerminated);
|
|
virtual void SetTerminationFunction(nsScriptTerminationFunc aFunc,
|
|
nsIDOMWindow* aRef);
|
|
virtual bool GetScriptsEnabled();
|
|
virtual void SetScriptsEnabled(bool aEnabled, bool aFireTimeouts);
|
|
|
|
virtual nsresult SetProperty(JSObject* aTarget, const char* aPropName, nsISupports* aVal);
|
|
|
|
virtual bool GetProcessingScriptTag();
|
|
virtual void SetProcessingScriptTag(bool aResult);
|
|
|
|
virtual bool GetExecutingScript();
|
|
|
|
virtual void SetGCOnDestruction(bool aGCOnDestruction);
|
|
|
|
virtual nsresult InitClasses(JSObject* aGlobalObj);
|
|
|
|
virtual void WillInitializeContext();
|
|
virtual void DidInitializeContext();
|
|
|
|
virtual nsresult Serialize(nsIObjectOutputStream* aStream, JSScript* aScriptObject);
|
|
virtual nsresult Deserialize(nsIObjectInputStream* aStream,
|
|
nsScriptObjectHolder<JSScript>& aResult);
|
|
|
|
virtual nsresult DropScriptObject(void *object);
|
|
virtual nsresult HoldScriptObject(void *object);
|
|
|
|
virtual void EnterModalState();
|
|
virtual void LeaveModalState();
|
|
|
|
NS_DECL_NSIXPCSCRIPTNOTIFY
|
|
|
|
static void LoadStart();
|
|
static void LoadEnd();
|
|
|
|
static void GarbageCollectNow(js::gcreason::Reason reason,
|
|
PRUint32 aGckind,
|
|
bool aGlobal);
|
|
static void ShrinkGCBuffersNow();
|
|
// If aExtraForgetSkippableCalls is -1, forgetSkippable won't be
|
|
// called even if the previous collection was GC.
|
|
static void CycleCollectNow(nsICycleCollectorListener *aListener = nsnull,
|
|
PRInt32 aExtraForgetSkippableCalls = 0);
|
|
|
|
static void PokeGC(js::gcreason::Reason aReason, int aDelay = 0);
|
|
static void KillGCTimer();
|
|
|
|
static void PokeShrinkGCBuffers();
|
|
static void KillShrinkGCBuffersTimer();
|
|
|
|
static void MaybePokeCC();
|
|
static void KillCCTimer();
|
|
static void KillFullGCTimer();
|
|
|
|
virtual void GC(js::gcreason::Reason aReason);
|
|
|
|
static PRUint32 CleanupsSinceLastGC();
|
|
|
|
nsIScriptGlobalObject* GetCachedGlobalObject()
|
|
{
|
|
// Verify that we have a global so that this
|
|
// does always return a null when GetGlobalObject() is null.
|
|
JSObject* global = JS_GetGlobalObject(mContext);
|
|
return global ? mGlobalObjectRef.get() : nsnull;
|
|
}
|
|
protected:
|
|
nsresult InitializeExternalClasses();
|
|
|
|
// Helper to convert xpcom datatypes to jsvals.
|
|
nsresult ConvertSupportsTojsvals(nsISupports *aArgs,
|
|
JSObject *aScope,
|
|
PRUint32 *aArgc,
|
|
jsval **aArgv,
|
|
mozilla::Maybe<nsRootedJSValueArray> &aPoolRelease);
|
|
|
|
nsresult AddSupportsPrimitiveTojsvals(nsISupports *aArg, jsval *aArgv);
|
|
|
|
// given an nsISupports object (presumably an event target or some other
|
|
// DOM object), get (or create) the JSObject wrapping it.
|
|
nsresult JSObjectFromInterface(nsISupports *aSup, JSObject *aScript,
|
|
JSObject **aRet);
|
|
|
|
// Report the pending exception on our mContext, if any. This
|
|
// function will set aside the frame chain on mContext before
|
|
// reporting.
|
|
void ReportPendingException();
|
|
private:
|
|
void DestroyJSContext();
|
|
|
|
nsrefcnt GetCCRefcnt();
|
|
|
|
JSContext *mContext;
|
|
bool mActive;
|
|
|
|
protected:
|
|
struct TerminationFuncHolder;
|
|
friend struct TerminationFuncHolder;
|
|
|
|
struct TerminationFuncClosure
|
|
{
|
|
TerminationFuncClosure(nsScriptTerminationFunc aFunc,
|
|
nsISupports* aArg,
|
|
TerminationFuncClosure* aNext) :
|
|
mTerminationFunc(aFunc),
|
|
mTerminationFuncArg(aArg),
|
|
mNext(aNext)
|
|
{
|
|
}
|
|
~TerminationFuncClosure()
|
|
{
|
|
delete mNext;
|
|
}
|
|
|
|
nsScriptTerminationFunc mTerminationFunc;
|
|
nsCOMPtr<nsISupports> mTerminationFuncArg;
|
|
TerminationFuncClosure* mNext;
|
|
};
|
|
|
|
struct TerminationFuncHolder
|
|
{
|
|
TerminationFuncHolder(nsJSContext* aContext)
|
|
: mContext(aContext),
|
|
mTerminations(aContext->mTerminations)
|
|
{
|
|
aContext->mTerminations = nsnull;
|
|
}
|
|
~TerminationFuncHolder()
|
|
{
|
|
// Have to be careful here. mContext might have picked up new
|
|
// termination funcs while the script was evaluating. Prepend whatever
|
|
// we have to the current termination funcs on the context (since our
|
|
// termination funcs were posted first).
|
|
if (mTerminations) {
|
|
TerminationFuncClosure* cur = mTerminations;
|
|
while (cur->mNext) {
|
|
cur = cur->mNext;
|
|
}
|
|
cur->mNext = mContext->mTerminations;
|
|
mContext->mTerminations = mTerminations;
|
|
}
|
|
}
|
|
|
|
nsJSContext* mContext;
|
|
TerminationFuncClosure* mTerminations;
|
|
};
|
|
|
|
TerminationFuncClosure* mTerminations;
|
|
|
|
private:
|
|
bool mIsInitialized;
|
|
bool mScriptsEnabled;
|
|
bool mGCOnDestruction;
|
|
bool mProcessingScriptTag;
|
|
|
|
PRUint32 mExecuteDepth;
|
|
PRUint32 mDefaultJSOptions;
|
|
PRTime mOperationCallbackTime;
|
|
|
|
PRTime mModalStateTime;
|
|
PRUint32 mModalStateDepth;
|
|
|
|
nsJSContext *mNext;
|
|
nsJSContext **mPrev;
|
|
|
|
// mGlobalObjectRef ensures that the outer window stays alive as long as the
|
|
// context does. It is eventually collected by the cycle collector.
|
|
nsCOMPtr<nsIScriptGlobalObject> mGlobalObjectRef;
|
|
|
|
static int JSOptionChangedCallback(const char *pref, void *data);
|
|
|
|
static JSBool DOMOperationCallback(JSContext *cx);
|
|
};
|
|
|
|
class nsIJSRuntimeService;
|
|
|
|
class nsJSRuntime : public nsIScriptRuntime
|
|
{
|
|
public:
|
|
// let people who can see us use our runtime for convenience.
|
|
static JSRuntime *sRuntime;
|
|
|
|
public:
|
|
// nsISupports
|
|
NS_DECL_ISUPPORTS
|
|
|
|
virtual already_AddRefed<nsIScriptContext> CreateContext();
|
|
|
|
virtual nsresult ParseVersion(const nsString &aVersionStr, PRUint32 *flags);
|
|
|
|
virtual nsresult DropScriptObject(void *object);
|
|
virtual nsresult HoldScriptObject(void *object);
|
|
|
|
static void Startup();
|
|
static void Shutdown();
|
|
// Setup all the statics etc - safe to call multiple times after Startup()
|
|
static nsresult Init();
|
|
// Get the NameSpaceManager, creating if necessary
|
|
static nsScriptNameSpaceManager* GetNameSpaceManager();
|
|
};
|
|
|
|
// An interface for fast and native conversion to/from nsIArray. If an object
|
|
// supports this interface, JS can reach directly in for the argv, and avoid
|
|
// nsISupports conversion. If this interface is not supported, the object will
|
|
// be queried for nsIArray, and everything converted via xpcom objects.
|
|
#define NS_IJSARGARRAY_IID \
|
|
{ 0xb6acdac8, 0xf5c6, 0x432c, \
|
|
{ 0xa8, 0x6e, 0x33, 0xee, 0xb1, 0xb0, 0xcd, 0xdc } }
|
|
|
|
class nsIJSArgArray : public nsIArray
|
|
{
|
|
public:
|
|
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSARGARRAY_IID)
|
|
// Bug 312003 describes why this must be "void **", but after calling argv
|
|
// may be cast to jsval* and the args found at:
|
|
// ((jsval*)argv)[0], ..., ((jsval*)argv)[argc - 1]
|
|
virtual nsresult GetArgs(PRUint32 *argc, void **argv) = 0;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSArgArray, NS_IJSARGARRAY_IID)
|
|
|
|
/* factory functions */
|
|
nsresult NS_CreateJSRuntime(nsIScriptRuntime **aRuntime);
|
|
|
|
/* prototypes */
|
|
void NS_ScriptErrorReporter(JSContext *cx, const char *message, JSErrorReport *report);
|
|
|
|
JSObject* NS_DOMReadStructuredClone(JSContext* cx,
|
|
JSStructuredCloneReader* reader, uint32_t tag,
|
|
uint32_t data, void* closure);
|
|
|
|
JSBool NS_DOMWriteStructuredClone(JSContext* cx,
|
|
JSStructuredCloneWriter* writer,
|
|
JSObject* obj, void *closure);
|
|
|
|
void NS_DOMStructuredCloneError(JSContext* cx, uint32_t errorid);
|
|
|
|
#endif /* nsJSEnvironment_h */
|