nsJSEnvironment.h
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#ifndef nsJSEnvironment_h___
#define nsJSEnvironment_h___
#include "nsIScriptContext.h"
#include "nsIScriptRuntime.h"
#include "nsCOMPtr.h"
#include "jsapi.h"
#include "nsIObserver.h"
#include "nsIXPCScriptNotify.h"
#include "prtime.h"
#include "nsCycleCollectionParticipant.h"
#include "nsScriptNameSpaceManager.h"
class nsIXPConnectJSObjectHolder;
class nsAutoPoolRelease;
namespace js {
class AutoArrayRooter;
}
namespace mozilla {
template <class> class Maybe;
}
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 PRUint32 GetScriptTypeID()
{ return nsIProgrammingLanguage::JAVASCRIPT; }
virtual nsresult EvaluateString(const nsAString& aScript,
void *aScopeObject,
nsIPrincipal *principal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
nsAString *aRetValue,
PRBool* aIsUndefined);
virtual nsresult EvaluateStringWithValue(const nsAString& aScript,
void *aScopeObject,
nsIPrincipal *aPrincipal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
void* aRetValue,
PRBool* aIsUndefined);
virtual nsresult CompileScript(const PRUnichar* aText,
PRInt32 aTextLength,
void *aScopeObject,
nsIPrincipal *principal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
nsScriptObjectHolder &aScriptObject);
virtual nsresult ExecuteScript(void* aScriptObject,
void *aScopeObject,
nsAString* aRetValue,
PRBool* aIsUndefined);
virtual nsresult CompileEventHandler(nsIAtom *aName,
PRUint32 aArgCount,
const char** aArgNames,
const nsAString& aBody,
const char *aURL, PRUint32 aLineNo,
PRUint32 aVersion,
nsScriptObjectHolder &aHandler);
virtual nsresult CallEventHandler(nsISupports* aTarget, void *aScope,
void* aHandler,
nsIArray *argv, nsIVariant **rv);
virtual nsresult BindCompiledEventHandler(nsISupports *aTarget,
void *aScope,
nsIAtom *aName,
void *aHandler);
virtual nsresult GetBoundEventHandler(nsISupports* aTarget, void *aScope,
nsIAtom* aName,
nsScriptObjectHolder &aHandler);
virtual nsresult CompileFunction(void* aTarget,
const nsACString& aName,
PRUint32 aArgCount,
const char** aArgArray,
const nsAString& aBody,
const char* aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
PRBool aShared,
void** aFunctionObject);
virtual void SetDefaultLanguageVersion(PRUint32 aVersion);
virtual nsIScriptGlobalObject *GetGlobalObject();
virtual void *GetNativeContext();
virtual void *GetNativeGlobal();
virtual nsresult CreateNativeGlobalForInner(
nsIScriptGlobalObject *aGlobal,
PRBool aIsChrome,
nsIPrincipal *aPrincipal,
void **aNativeGlobal,
nsISupports **aHolder);
virtual nsresult ConnectToInner(nsIScriptGlobalObject *aNewInner,
void *aOuterGlobal);
virtual nsresult InitContext();
virtual nsresult CreateOuterObject(nsIScriptGlobalObject *aGlobalObject,
nsIScriptGlobalObject *aCurrentInner);
virtual nsresult SetOuterObject(void *aOuterObject);
virtual nsresult InitOuterWindow();
virtual PRBool IsContextInitialized();
virtual void FinalizeContext();
virtual void ScriptEvaluated(PRBool aTerminated);
virtual nsresult SetTerminationFunction(nsScriptTerminationFunc aFunc,
nsISupports* aRef);
virtual PRBool GetScriptsEnabled();
virtual void SetScriptsEnabled(PRBool aEnabled, PRBool aFireTimeouts);
virtual nsresult SetProperty(void *aTarget, const char *aPropName, nsISupports *aVal);
virtual PRBool GetProcessingScriptTag();
virtual void SetProcessingScriptTag(PRBool aResult);
virtual PRBool GetExecutingScript();
virtual void SetGCOnDestruction(PRBool aGCOnDestruction);
virtual nsresult InitClasses(void *aGlobalObj);
virtual void ClearScope(void* aGlobalObj, PRBool bClearPolluters);
virtual void WillInitializeContext();
virtual void DidInitializeContext();
virtual void DidSetDocument(nsISupports *aDocdoc, void *aGlobal) {;}
virtual nsresult Serialize(nsIObjectOutputStream* aStream, void *aScriptObject);
virtual nsresult Deserialize(nsIObjectInputStream* aStream,
nsScriptObjectHolder &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();
static void CycleCollectNow(nsICycleCollectorListener *aListener = nsnull);
static void PokeGC();
static void KillGCTimer();
static void PokeCC();
static void MaybePokeCC();
static void KillCCTimer();
virtual void GC();
protected:
nsresult InitializeExternalClasses();
// Helper to convert xpcom datatypes to jsvals.
nsresult ConvertSupportsTojsvals(nsISupports *aArgs,
void *aScope,
PRUint32 *aArgc,
jsval **aArgv,
mozilla::Maybe<nsAutoPoolRelease> &aPoolRelease,
mozilla::Maybe<js::AutoArrayRooter> &aRooter);
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, void *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;
PRUint32 mNumEvaluations;
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:
PRPackedBool mIsInitialized;
PRPackedBool mScriptsEnabled;
PRPackedBool mGCOnDestruction;
PRPackedBool mProcessingScriptTag;
PRUint32 mExecuteDepth;
PRUint32 mDefaultJSOptions;
PRTime mOperationCallbackTime;
PRTime mModalStateTime;
PRUint32 mModalStateDepth;
// 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 PRUint32 GetScriptTypeID() {
return nsIProgrammingLanguage::JAVASCRIPT;
}
virtual nsresult CreateContext(nsIScriptContext **ret);
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 \
{ /*{E96FB2AE-CB4F-44a0-81F8-D91C80AFE9A3} */ \
0xe96fb2ae, 0xcb4f, 0x44a0, \
{ 0x81, 0xf8, 0xd9, 0x1c, 0x80, 0xaf, 0xe9, 0xa3 } }
class nsIJSArgArray: public nsISupports
{
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);
#endif /* nsJSEnvironment_h___ */
