1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** No Commercial Usage
11 ** This file contains pre-release code and may not be distributed.
12 ** You may use this file in accordance with the terms and conditions
13 ** contained in the Technology Preview License Agreement accompanying
16 ** GNU Lesser General Public License Usage
17 ** Alternatively, this file may be used under the terms of the GNU Lesser
18 ** General Public License version 2.1 as published by the Free Software
19 ** Foundation and appearing in the file LICENSE.LGPL included in the
20 ** packaging of this file. Please review the following information to
21 ** ensure the GNU Lesser General Public License version 2.1 requirements
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24 ** In addition, as a special exception, Nokia gives you certain additional
25 ** rights. These rights are described in the Nokia Qt LGPL Exception
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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29 ** Nokia at qt-info@nokia.com.
40 ****************************************************************************/
42 #ifndef QDECLARATIVEV8ENGINE_P_H
43 #define QDECLARATIVEV8ENGINE_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include <QtCore/qglobal.h>
57 #include <QtCore/qvariant.h>
58 #include <QtCore/qset.h>
59 #include <QtCore/qmutex.h>
60 #include <private/qv8_p.h>
62 #include <private/qdeclarativepropertycache_p.h>
64 #include "qv8contextwrapper_p.h"
65 #include "qv8qobjectwrapper_p.h"
66 #include "qv8stringwrapper_p.h"
67 #include "qv8typewrapper_p.h"
68 #include "qv8listwrapper_p.h"
69 #include "qv8variantwrapper_p.h"
70 #include "qv8valuetypewrapper_p.h"
75 // Uncomment the following line to enable global handle debugging. When enabled, all the persistent
76 // handles allocated using qPersistentNew() (or registered with qPersistentRegsiter()) and disposed
77 // with qPersistentDispose() are tracked. If you try and do something illegal, like double disposing
78 // a handle, qFatal() is called.
79 // #define QML_GLOBAL_HANDLE_DEBUGGING
81 #define V8_RESOURCE_TYPE(resourcetype) \
83 enum { V8ResourceType = QV8ObjectResource:: resourcetype }; \
84 virtual QV8ObjectResource::ResourceType resourceType() const { return QV8ObjectResource:: resourcetype; } \
87 #define V8ENGINE() ((QV8Engine *)v8::External::Unwrap(args.Data()))
88 #define V8FUNCTION(function, engine) v8::FunctionTemplate::New(function, v8::External::Wrap((QV8Engine*)engine))->GetFunction()
89 #define V8THROW_ERROR(string) { \
90 v8::ThrowException(v8::Exception::Error(v8::String::New(string))); \
91 return v8::Handle<v8::Value>(); \
93 #define V8THROW_TYPE(string) { \
94 v8::ThrowException(v8::Exception::TypeError(v8::String::New(string))); \
95 return v8::Handle<v8::Value>(); \
97 #define V8ENGINE_ACCESSOR() ((QV8Engine *)v8::External::Unwrap(info.Data()));
98 #define V8THROW_ERROR_SETTER(string) { \
99 v8::ThrowException(v8::Exception::Error(v8::String::New(string))); \
103 #define V8_DEFINE_EXTENSION(dataclass, datafunction) \
104 inline dataclass *datafunction(QV8Engine *engine) \
106 static int extensionId = -1; \
107 if (extensionId == -1) { \
108 QV8Engine::registrationMutex()->lock(); \
109 if (extensionId == -1) \
110 extensionId = QV8Engine::registerExtension(); \
111 QV8Engine::registrationMutex()->unlock(); \
113 dataclass *rv = (dataclass *)engine->extensionData(extensionId); \
115 rv = new dataclass(engine); \
116 engine->setExtensionData(extensionId, rv); \
122 class QV8ObjectResource : public v8::Object::ExternalResource
125 QV8ObjectResource(QV8Engine *engine) : engine(engine) { Q_ASSERT(engine); }
126 enum ResourceType { ContextType, QObjectType, TypeType, ListType, VariantType,
127 ValueTypeType, XMLHttpRequestType, DOMNodeType, SQLDatabaseType,
128 ListModelType, Context2DType, ParticleDataType };
129 virtual ResourceType resourceType() const = 0;
135 inline T *v8_resource_cast(v8::Handle<v8::Object> object) {
136 QV8ObjectResource *resource = static_cast<QV8ObjectResource *>(object->GetExternalResource());
137 return (resource && (quint32)resource->resourceType() == (quint32)T::V8ResourceType)?static_cast<T *>(resource):0;
141 inline T *v8_resource_check(v8::Handle<v8::Object> object) {
142 T *resource = static_cast<T *>(object->GetExternalResource());
143 Q_ASSERT(resource && resource->resourceType() == (quint32)T::V8ResourceType);
147 // Used to allow a QObject method take and return raw V8 handles without having to expose
148 // v8 in the public API.
150 // class MyClass : public QObject {
153 // Q_INVOKABLE void myMethod(QDeclarativeV8Function*);
155 // The QDeclarativeV8Function - and consequently the arguments and return value - only remains
156 // valid during the call. If the return value isn't set within myMethod(), the will return
159 class QDeclarativeV8Function
162 int Length() const { return _ac; }
163 v8::Local<v8::Value> operator[](int idx) { return (*_a)->Get(idx); }
164 QDeclarativeContextData *context() { return _c; }
165 v8::Handle<v8::Object> qmlGlobal() { return *_g; }
166 void returnValue(v8::Handle<v8::Value> rv) { *_r = rv; }
167 QV8Engine *engine() const { return _e; }
169 friend class QV8QObjectWrapper;
170 QDeclarativeV8Function();
171 QDeclarativeV8Function(const QDeclarativeV8Function &);
172 QDeclarativeV8Function &operator=(const QDeclarativeV8Function &);
174 QDeclarativeV8Function(int length, v8::Handle<v8::Object> &args,
175 v8::Handle<v8::Value> &rv, v8::Handle<v8::Object> &global,
176 QDeclarativeContextData *c, QV8Engine *e)
177 : _ac(length), _a(&args), _r(&rv), _g(&global), _c(c), _e(e) {}
180 v8::Handle<v8::Object> *_a;
181 v8::Handle<v8::Value> *_r;
182 v8::Handle<v8::Object> *_g;
183 QDeclarativeContextData *_c;
187 class QDeclarativeV8Handle
190 QDeclarativeV8Handle() : d(0) {}
191 QDeclarativeV8Handle(const QDeclarativeV8Handle &other) : d(other.d) {}
192 QDeclarativeV8Handle &operator=(const QDeclarativeV8Handle &other) { d = other.d; return *this; }
194 static QDeclarativeV8Handle fromHandle(v8::Handle<v8::Value> h) {
195 return QDeclarativeV8Handle(*h);
197 v8::Handle<v8::Value> toHandle() const {
198 return v8::Handle<v8::Value>((v8::Value *)d);
201 QDeclarativeV8Handle(void *d) : d(d) {}
206 class QDeclarativeEngine;
207 class QDeclarativeValueType;
208 class QNetworkAccessManager;
209 class QDeclarativeContextData;
210 class Q_DECLARATIVE_EXPORT QV8Engine
217 virtual ~Deletable() {}
220 void init(QDeclarativeEngine *);
222 QDeclarativeEngine *engine() { return m_engine; }
223 v8::Local<v8::Object> global() { return m_context->Global(); }
224 v8::Handle<v8::Context> context() { return m_context; }
225 QV8ContextWrapper *contextWrapper() { return &m_contextWrapper; }
226 QV8QObjectWrapper *qobjectWrapper() { return &m_qobjectWrapper; }
227 QV8TypeWrapper *typeWrapper() { return &m_typeWrapper; }
228 QV8ListWrapper *listWrapper() { return &m_listWrapper; }
229 QV8VariantWrapper *variantWrapper() { return &m_variantWrapper; }
231 void *xmlHttpRequestData() { return m_xmlHttpRequestData; }
232 void *sqlDatabaseData() { return m_sqlDatabaseData; }
234 Deletable *listModelData() { return m_listModelData; }
235 void setListModelData(Deletable *d) { if (m_listModelData) delete m_listModelData; m_listModelData = d; }
237 QDeclarativeContextData *callingContext();
239 v8::Local<v8::Array> getOwnPropertyNames(v8::Handle<v8::Object>);
240 void freezeObject(v8::Handle<v8::Value>);
242 inline QString toString(v8::Handle<v8::Value> string);
243 inline QString toString(v8::Handle<v8::String> string);
244 static QString toStringStatic(v8::Handle<v8::Value>);
245 static QString toStringStatic(v8::Handle<v8::String>);
246 static inline bool startsWithUpper(v8::Handle<v8::String>);
248 QVariant toVariant(v8::Handle<v8::Value>, int typeHint);
249 v8::Handle<v8::Value> fromVariant(const QVariant &);
250 inline bool isVariant(v8::Handle<v8::Value>);
252 // Compile \a source (from \a fileName at \a lineNumber) in QML mode
253 v8::Local<v8::Script> qmlModeCompile(const QString &source,
254 const QString &fileName = QString(),
257 // Return the QML global "scope" object for the \a ctxt context and \a scope object.
258 inline v8::Local<v8::Object> qmlScope(QDeclarativeContextData *ctxt, QObject *scope);
260 // Return a JS wrapper for the given QObject \a object
261 inline v8::Handle<v8::Value> newQObject(QObject *object);
262 inline bool isQObject(v8::Handle<v8::Value>);
263 inline QObject *toQObject(v8::Handle<v8::Value>);
265 // Return a JS string for the given QString \a string
266 inline v8::Local<v8::String> toString(const QString &string);
268 // Create a new value type object
269 inline v8::Handle<v8::Value> newValueType(QObject *, int coreIndex, QDeclarativeValueType *);
270 inline v8::Handle<v8::Value> newValueType(const QVariant &, QDeclarativeValueType *);
272 // Create a new QVariant object. This doesn't examine the type of the variant, but always returns
273 // a QVariant wrapper
274 inline v8::Handle<v8::Value> newQVariant(const QVariant &);
276 // Return the network access manager for this engine. By default this returns the network
277 // access manager of the QDeclarativeEngine. It is overridden in the case of a threaded v8
278 // instance (like in WorkerScript).
279 virtual QNetworkAccessManager *networkAccessManager();
281 // Return the list of illegal id names (the names of the properties on the global object)
282 const QSet<QString> &illegalNames() const;
286 #ifdef QML_GLOBAL_HANDLE_DEBUGGING
287 // Used for handle debugging
288 static void registerHandle(void *);
289 static void releaseHandle(void *);
292 static QMutex *registrationMutex();
293 static int registerExtension();
295 inline Deletable *extensionData(int) const;
296 void setExtensionData(int, Deletable *);
299 QDeclarativeEngine *m_engine;
300 v8::Persistent<v8::Context> m_context;
302 QV8StringWrapper m_stringWrapper;
303 QV8ContextWrapper m_contextWrapper;
304 QV8QObjectWrapper m_qobjectWrapper;
305 QV8TypeWrapper m_typeWrapper;
306 QV8ListWrapper m_listWrapper;
307 QV8VariantWrapper m_variantWrapper;
308 QV8ValueTypeWrapper m_valueTypeWrapper;
310 v8::Persistent<v8::Function> m_getOwnPropertyNames;
311 v8::Persistent<v8::Function> m_freezeObject;
313 void *m_xmlHttpRequestData;
314 void *m_sqlDatabaseData;
316 QVector<Deletable *> m_extensionData;
317 Deletable *m_listModelData;
319 QSet<QString> m_illegalNames;
321 QVariant toBasicVariant(v8::Handle<v8::Value>);
323 void initializeGlobal(v8::Handle<v8::Object>);
325 static v8::Handle<v8::Value> gc(const v8::Arguments &args);
326 static v8::Handle<v8::Value> print(const v8::Arguments &args);
327 static v8::Handle<v8::Value> isQtObject(const v8::Arguments &args);
328 static v8::Handle<v8::Value> rgba(const v8::Arguments &args);
329 static v8::Handle<v8::Value> hsla(const v8::Arguments &args);
330 static v8::Handle<v8::Value> rect(const v8::Arguments &args);
331 static v8::Handle<v8::Value> point(const v8::Arguments &args);
332 static v8::Handle<v8::Value> size(const v8::Arguments &args);
333 static v8::Handle<v8::Value> vector3d(const v8::Arguments &args);
334 static v8::Handle<v8::Value> lighter(const v8::Arguments &args);
335 static v8::Handle<v8::Value> darker(const v8::Arguments &args);
336 static v8::Handle<v8::Value> tint(const v8::Arguments &args);
337 static v8::Handle<v8::Value> formatDate(const v8::Arguments &args);
338 static v8::Handle<v8::Value> formatTime(const v8::Arguments &args);
339 static v8::Handle<v8::Value> formatDateTime(const v8::Arguments &args);
340 static v8::Handle<v8::Value> openUrlExternally(const v8::Arguments &args);
341 static v8::Handle<v8::Value> fontFamilies(const v8::Arguments &args);
342 static v8::Handle<v8::Value> md5(const v8::Arguments &args);
343 static v8::Handle<v8::Value> btoa(const v8::Arguments &args);
344 static v8::Handle<v8::Value> atob(const v8::Arguments &args);
345 static v8::Handle<v8::Value> quit(const v8::Arguments &args);
346 static v8::Handle<v8::Value> resolvedUrl(const v8::Arguments &args);
347 static v8::Handle<v8::Value> createQmlObject(const v8::Arguments &args);
348 static v8::Handle<v8::Value> createComponent(const v8::Arguments &args);
349 static v8::Handle<v8::Value> qsTranslate(const v8::Arguments &args);
350 static v8::Handle<v8::Value> qsTranslateNoOp(const v8::Arguments &args);
351 static v8::Handle<v8::Value> qsTr(const v8::Arguments &args);
352 static v8::Handle<v8::Value> qsTrNoOp(const v8::Arguments &args);
353 static v8::Handle<v8::Value> qsTrId(const v8::Arguments &args);
354 static v8::Handle<v8::Value> qsTrIdNoOp(const v8::Arguments &args);
355 static v8::Handle<v8::Value> stringArg(const v8::Arguments &args);
357 double qtDateTimeToJsDate(const QDateTime &dt);
358 QDateTime qtDateTimeFromJsDate(double jsDate);
361 // Allocate a new Persistent handle. *ALL* persistent handles in QML must be allocated
362 // using this method.
364 v8::Persistent<T> qPersistentNew(v8::Handle<T> that)
366 v8::Persistent<T> rv = v8::Persistent<T>::New(that);
367 #ifdef QML_GLOBAL_HANDLE_DEBUGGING
368 QV8Engine::registerHandle(*rv);
373 // Register a Persistent handle that was returned to you by V8 (such as by
374 // v8::Context::New). This allows us to do handle tracking on these handles too.
376 void qPersistentRegister(v8::Persistent<T> handle)
378 #ifdef QML_GLOBAL_HANDLE_DEBUGGING
379 QV8Engine::registerHandle(*handle);
385 // Dispose and clear a persistent handle. *ALL* persistent handles in QML must be
386 // disposed using this method.
388 void qPersistentDispose(v8::Persistent<T> &that)
390 #ifdef QML_GLOBAL_HANDLE_DEBUGGING
391 QV8Engine::releaseHandle(*that);
397 QString QV8Engine::toString(v8::Handle<v8::Value> string)
399 return m_stringWrapper.toString(string->ToString());
402 QString QV8Engine::toString(v8::Handle<v8::String> string)
404 return m_stringWrapper.toString(string);
407 bool QV8Engine::isVariant(v8::Handle<v8::Value> value)
409 return m_variantWrapper.isVariant(value);
412 v8::Local<v8::Object> QV8Engine::qmlScope(QDeclarativeContextData *ctxt, QObject *scope)
414 return m_contextWrapper.qmlScope(ctxt, scope);
417 bool QV8Engine::isQObject(v8::Handle<v8::Value> obj)
419 return obj->IsObject()?m_qobjectWrapper.isQObject(v8::Handle<v8::Object>::Cast(obj)):false;
422 QObject *QV8Engine::toQObject(v8::Handle<v8::Value> obj)
424 return obj->IsObject()?m_qobjectWrapper.toQObject(v8::Handle<v8::Object>::Cast(obj)):0;
427 v8::Handle<v8::Value> QV8Engine::newQObject(QObject *object)
429 return m_qobjectWrapper.newQObject(object);
432 v8::Local<v8::String> QV8Engine::toString(const QString &string)
434 return m_stringWrapper.toString(string);
437 v8::Handle<v8::Value> QV8Engine::newValueType(QObject *object, int property, QDeclarativeValueType *type)
439 return m_valueTypeWrapper.newValueType(object, property, type);
442 v8::Handle<v8::Value> QV8Engine::newValueType(const QVariant &value, QDeclarativeValueType *type)
444 return m_valueTypeWrapper.newValueType(value, type);
447 // XXX Can this be made more optimal? It is called prior to resolving each and every
448 // unqualified name in QV8ContextWrapper.
449 bool QV8Engine::startsWithUpper(v8::Handle<v8::String> string)
451 uint16_t c = string->GetCharacter(0);
452 return (c >= 'A' && c <= 'Z') ||
453 (c > 127 && QChar::category(c) == QChar::Letter_Uppercase);
456 QV8Engine::Deletable *QV8Engine::extensionData(int index) const
458 if (index < m_extensionData.count())
459 return m_extensionData[index];
466 #endif // QDECLARATIVEV8ENGINE_P_H