1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/
6 ** This file is part of the QtDeclarative module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** GNU Lesser General Public License Usage
10 ** This file may be used under the terms of the GNU Lesser General Public
11 ** License version 2.1 as published by the Free Software Foundation and
12 ** appearing in the file LICENSE.LGPL included in the packaging of this
13 ** file. Please review the following information to ensure the GNU Lesser
14 ** General Public License version 2.1 requirements will be met:
15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
17 ** In addition, as a special exception, Nokia gives you certain additional
18 ** rights. These rights are described in the Nokia Qt LGPL Exception
19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
21 ** GNU General Public License Usage
22 ** Alternatively, this file may be used under the terms of the GNU General
23 ** Public License version 3.0 as published by the Free Software Foundation
24 ** and appearing in the file LICENSE.GPL included in the packaging of this
25 ** file. Please review the following information to ensure the GNU General
26 ** Public License version 3.0 requirements will be met:
27 ** http://www.gnu.org/copyleft/gpl.html.
30 ** Alternatively, this file may be used in accordance with the terms and
31 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #include "qdeclarativevme_p.h"
44 #include "qdeclarativecompiler_p.h"
45 #include "qdeclarativeboundsignal_p.h"
46 #include "qdeclarativestringconverters_p.h"
47 #include <private/qmetaobjectbuilder_p.h>
48 #include <private/qfastmetabuilder_p.h>
49 #include "qdeclarativedata_p.h"
50 #include "qdeclarative.h"
51 #include "qdeclarativecustomparser_p.h"
52 #include "qdeclarativeengine.h"
53 #include "qdeclarativecontext.h"
54 #include "qdeclarativecomponent.h"
55 #include "qdeclarativecomponentattached_p.h"
56 #include "qdeclarativebinding_p.h"
57 #include "qdeclarativeengine_p.h"
58 #include "qdeclarativecomponent_p.h"
59 #include "qdeclarativevmemetaobject_p.h"
60 #include "qdeclarativebinding_p_p.h"
61 #include "qdeclarativecontext_p.h"
62 #include <private/qv4bindings_p.h>
63 #include <private/qv8bindings_p.h>
64 #include "qdeclarativeglobal_p.h"
65 #include <private/qfinitestack_p.h>
66 #include "qdeclarativescriptstring.h"
67 #include "qdeclarativescriptstring_p.h"
68 #include "qdeclarativepropertyvalueinterceptor_p.h"
75 #include <QtCore/qdebug.h>
76 #include <QtCore/qvarlengtharray.h>
77 #include <QtCore/qcoreapplication.h>
78 #include <QtCore/qdatetime.h>
79 #include <QtCore/qvarlengtharray.h>
80 #include <QtDeclarative/qjsvalue.h>
84 using namespace QDeclarativeVMETypes;
86 #define VME_EXCEPTION(desc, line) \
88 QDeclarativeError error; \
89 error.setDescription(desc.trimmed()); \
90 error.setLine(line); \
91 error.setUrl(COMP->url); \
96 void QDeclarativeVME::init(QDeclarativeContextData *ctxt, QDeclarativeCompiledData *comp, int start,
97 QDeclarativeContextData *creation)
105 creationContext = creation;
109 initState.context = ctxt;
110 initState.compiledData = comp;
111 initState.instructionStream = comp->bytecode.constData() + start;
112 states.push(initState);
114 typedef QDeclarativeInstruction I;
115 I *i = (I *)initState.instructionStream;
117 Q_ASSERT(comp->instructionType(i) == I::Init);
119 objects.allocate(i->init.objectStackSize);
120 lists.allocate(i->init.listStackSize);
121 bindValues.allocate(i->init.bindingsSize);
122 parserStatus.allocate(i->init.parserStatusSize);
124 #ifdef QML_ENABLE_TRACE
125 parserStatusData.allocate(i->init.parserStatusSize);
126 rootComponent = comp;
130 engine = ctxt->engine;
133 bool QDeclarativeVME::initDeferred(QObject *object)
135 QDeclarativeData *data = QDeclarativeData::get(object);
137 if (!data || !data->context || !data->deferredComponent)
140 QDeclarativeContextData *ctxt = data->context;
141 QDeclarativeCompiledData *comp = data->deferredComponent;
142 int start = data->deferredIdx;
145 initState.flags = State::Deferred;
146 initState.context = ctxt;
147 initState.compiledData = comp;
148 initState.instructionStream = comp->bytecode.constData() + start;
149 states.push(initState);
151 typedef QDeclarativeInstruction I;
152 I *i = (I *)initState.instructionStream;
154 Q_ASSERT(comp->instructionType(i) == I::DeferInit);
156 objects.allocate(i->deferInit.objectStackSize);
157 lists.allocate(i->deferInit.listStackSize);
158 bindValues.allocate(i->deferInit.bindingsSize);
159 parserStatus.allocate(i->deferInit.parserStatusSize);
161 objects.push(object);
163 #ifdef QML_ENABLE_TRACE
164 parserStatusData.allocate(i->deferInit.parserStatusSize);
165 rootComponent = comp;
169 engine = ctxt->engine;
175 struct ActiveVMERestorer
177 ActiveVMERestorer(QDeclarativeVME *me, QDeclarativeEnginePrivate *ep)
178 : ep(ep), oldVME(ep->activeVME) { ep->activeVME = me; }
179 ~ActiveVMERestorer() { ep->activeVME = oldVME; }
181 QDeclarativeEnginePrivate *ep;
182 QDeclarativeVME *oldVME;
186 QObject *QDeclarativeVME::execute(QList<QDeclarativeError> *errors, const Interrupt &interrupt)
188 Q_ASSERT(states.count() >= 1);
190 #ifdef QML_ENABLE_TRACE
191 QDeclarativeTrace trace("VME Execute");
192 trace.addDetail("URL", rootComponent->url);
195 QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(states.at(0).context->engine);
197 ActiveVMERestorer restore(this, ep);
199 QObject *rv = run(errors, interrupt);
204 inline bool fastHasBinding(QObject *o, int index)
206 QDeclarativeData *ddata = static_cast<QDeclarativeData *>(QObjectPrivate::get(o)->declarativeData);
208 return ddata && (ddata->bindingBitsSize > index) &&
209 (ddata->bindingBits[index / 32] & (1 << (index % 32)));
212 static void removeBindingOnProperty(QObject *o, int index)
214 QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::setBinding(o, index, -1, 0);
215 if (binding) binding->destroy();
218 static QVariant variantFromString(const QString &string)
220 return QDeclarativeStringConverters::variantFromString(string);
223 // XXX we probably need some form of "work count" here to prevent us checking this
224 // for every instruction.
225 #define QML_BEGIN_INSTR_COMMON(I) { \
226 const QDeclarativeInstructionMeta<(int)QDeclarativeInstruction::I>::DataType &instr = QDeclarativeInstructionMeta<(int)QDeclarativeInstruction::I>::data(*genericInstr); \
227 INSTRUCTIONSTREAM += QDeclarativeInstructionMeta<(int)QDeclarativeInstruction::I>::Size; \
230 #ifdef QML_THREADED_VME_INTERPRETER
231 # define QML_BEGIN_INSTR(I) op_##I: \
232 QML_BEGIN_INSTR_COMMON(I)
234 # define QML_NEXT_INSTR(I) { \
235 if (watcher.hasRecursed()) return 0; \
236 genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM); \
237 goto *genericInstr->common.code; \
240 # define QML_END_INSTR(I) } \
241 if (watcher.hasRecursed()) return 0; \
242 genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM); \
243 if (interrupt.shouldInterrupt()) return 0; \
244 goto *genericInstr->common.code;
247 # define QML_BEGIN_INSTR(I) \
248 case QDeclarativeInstruction::I: \
249 QML_BEGIN_INSTR_COMMON(I)
251 # define QML_NEXT_INSTR(I) { \
252 if (watcher.hasRecursed()) return 0; \
256 # define QML_END_INSTR(I) \
257 if (watcher.hasRecursed() || interrupt.shouldInterrupt()) return 0; \
261 #define QML_STORE_VALUE(name, cpptype, value) \
262 QML_BEGIN_INSTR(name) \
264 void *a[] = { (void *)&v, 0, &status, &flags }; \
265 QObject *target = objects.top(); \
266 CLEAN_PROPERTY(target, instr.propertyIndex); \
267 QMetaObject::metacall(target, QMetaObject::WriteProperty, instr.propertyIndex, a); \
270 #define QML_STORE_LIST(name, cpptype, value) \
271 QML_BEGIN_INSTR(name) \
274 void *a[] = { (void *)&v, 0, &status, &flags }; \
275 QObject *target = objects.top(); \
276 CLEAN_PROPERTY(target, instr.propertyIndex); \
277 QMetaObject::metacall(target, QMetaObject::WriteProperty, instr.propertyIndex, a); \
280 #define QML_STORE_VAR(name, value) \
281 QML_BEGIN_INSTR(name) \
282 v8::Handle<v8::Value> v8value = value; \
283 QObject *target = objects.top(); \
284 CLEAN_PROPERTY(target, instr.propertyIndex); \
285 QMetaObject *mo = const_cast<QMetaObject *>(target->metaObject()); \
286 QDeclarativeVMEMetaObject *vmemo = static_cast<QDeclarativeVMEMetaObject *>(mo); \
287 vmemo->setVMEProperty(instr.propertyIndex, v8value); \
290 #define QML_STORE_POINTER(name, value) \
291 QML_BEGIN_INSTR(name) \
292 void *a[] = { (void *)value, 0, &status, &flags }; \
293 QObject *target = objects.top(); \
294 CLEAN_PROPERTY(target, instr.propertyIndex); \
295 QMetaObject::metacall(target, QMetaObject::WriteProperty, instr.propertyIndex, a); \
298 #define CLEAN_PROPERTY(o, index) \
299 if (fastHasBinding(o, index)) \
300 removeBindingOnProperty(o, index)
302 QObject *QDeclarativeVME::run(QList<QDeclarativeError> *errors,
303 const Interrupt &interrupt
304 #ifdef QML_THREADED_VME_INTERPRETER
305 , void ***storeJumpTable
309 #ifdef QML_THREADED_VME_INTERPRETER
310 if (storeJumpTable) {
311 #define QML_INSTR_ADDR(I, FMT) &&op_##I,
312 static void *jumpTable[] = {
313 FOR_EACH_QML_INSTR(QML_INSTR_ADDR)
315 #undef QML_INSTR_ADDR
316 *storeJumpTable = jumpTable;
320 Q_ASSERT(errors->isEmpty());
321 Q_ASSERT(states.count() >= 1);
323 QDeclarativeEngine *engine = states.at(0).context->engine;
324 QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
326 // Need a v8 handle scope and execution context for StoreVar instructions.
327 v8::HandleScope handleScope;
328 v8::Context::Scope contextScope(ep->v8engine()->context());
330 int status = -1; // needed for dbus
331 QDeclarativePropertyPrivate::WriteFlags flags = QDeclarativePropertyPrivate::BypassInterceptor |
332 QDeclarativePropertyPrivate::RemoveBindingOnAliasWrite;
334 QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
336 #define COMP states.top().compiledData
337 #define CTXT states.top().context
338 #define INSTRUCTIONSTREAM states.top().instructionStream
339 #define BINDINGSKIPLIST states.top().bindingSkipList
341 #define TYPES COMP->types
342 #define PRIMITIVES COMP->primitives
343 #define DATAS COMP->datas
344 #define PROPERTYCACHES COMP->propertyCaches
345 #define SCRIPTS COMP->scripts
346 #define URLS COMP->urls
348 #ifdef QML_THREADED_VME_INTERPRETER
349 const QDeclarativeInstruction *genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM);
350 goto *genericInstr->common.code;
353 const QDeclarativeInstruction *genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM);
355 switch (genericInstr->common.instructionType) {
358 // Store a created object in a property. These all pop from the objects stack.
359 QML_STORE_VALUE(StoreObject, QObject *, objects.pop());
360 QML_STORE_VALUE(StoreVariantObject, QVariant, QVariant::fromValue(objects.pop()));
361 QML_STORE_VAR(StoreVarObject, ep->v8engine()->newQObject(objects.pop()));
363 // Store a literal value in a corresponding property
364 QML_STORE_VALUE(StoreFloat, float, instr.value);
365 QML_STORE_VALUE(StoreDouble, double, instr.value);
366 QML_STORE_VALUE(StoreBool, bool, instr.value);
367 QML_STORE_VALUE(StoreInteger, int, instr.value);
368 QML_STORE_VALUE(StoreColor, QColor, QColor::fromRgba(instr.value));
369 QML_STORE_VALUE(StoreDate, QDate, QDate::fromJulianDay(instr.value));
370 QML_STORE_VALUE(StoreDateTime, QDateTime,
371 QDateTime(QDate::fromJulianDay(instr.date), *(QTime *)&instr.time));
372 QML_STORE_POINTER(StoreTime, (QTime *)&instr.time);
373 QML_STORE_POINTER(StorePoint, (QPoint *)&instr.point);
374 QML_STORE_POINTER(StorePointF, (QPointF *)&instr.point);
375 QML_STORE_POINTER(StoreSize, (QSize *)&instr.size);
376 QML_STORE_POINTER(StoreSizeF, (QSizeF *)&instr.size);
377 QML_STORE_POINTER(StoreRect, (QRect *)&instr.rect);
378 QML_STORE_POINTER(StoreRectF, (QRectF *)&instr.rect);
379 QML_STORE_POINTER(StoreVector3D, (QVector3D *)&instr.vector);
380 QML_STORE_POINTER(StoreVector4D, (QVector4D *)&instr.vector);
381 QML_STORE_POINTER(StoreString, &PRIMITIVES.at(instr.value));
382 QML_STORE_POINTER(StoreByteArray, &DATAS.at(instr.value));
383 QML_STORE_POINTER(StoreUrl, &URLS.at(instr.value));
384 QML_STORE_VALUE(StoreTrString, QString,
385 QCoreApplication::translate(DATAS.at(instr.context).constData(),
386 DATAS.at(instr.text).constData(),
387 DATAS.at(instr.comment).constData(),
388 QCoreApplication::UnicodeUTF8,
390 QML_STORE_VALUE(StoreTrIdString, QString, qtTrId(DATAS.at(instr.text).constData(), instr.n));
392 // Store a literal value in a QList
393 QML_STORE_LIST(StoreStringList, QStringList, PRIMITIVES.at(instr.value));
394 QML_STORE_LIST(StoreStringQList, QList<QString>, PRIMITIVES.at(instr.value));
395 QML_STORE_LIST(StoreUrlQList, QList<QUrl>, URLS.at(instr.value));
396 QML_STORE_LIST(StoreDoubleQList, QList<double>, instr.value);
397 QML_STORE_LIST(StoreBoolQList, QList<bool>, instr.value);
398 QML_STORE_LIST(StoreIntegerQList, QList<int>, instr.value);
400 // Store a literal value in a QVariant property
401 QML_STORE_VALUE(StoreVariant, QVariant, variantFromString(PRIMITIVES.at(instr.value)));
402 QML_STORE_VALUE(StoreVariantInteger, QVariant, QVariant(instr.value));
403 QML_STORE_VALUE(StoreVariantDouble, QVariant, QVariant(instr.value));
404 QML_STORE_VALUE(StoreVariantBool, QVariant, QVariant(instr.value));
406 // Store a literal value in a var property.
407 // We deliberately do not use string converters here
408 QML_STORE_VAR(StoreVar, ep->v8engine()->fromVariant(PRIMITIVES.at(instr.value)));
409 QML_STORE_VAR(StoreVarInteger, v8::Integer::New(instr.value));
410 QML_STORE_VAR(StoreVarDouble, v8::Number::New(instr.value));
411 QML_STORE_VAR(StoreVarBool, v8::Boolean::New(instr.value));
414 QML_BEGIN_INSTR(Init)
415 // Ensure that the compiled data has been initialized
416 if (!COMP->isInitialized()) COMP->initialize(engine);
418 QDeclarativeContextData *parentCtxt = CTXT;
419 CTXT = new QDeclarativeContextData;
420 CTXT->isInternal = true;
421 CTXT->url = COMP->url;
422 CTXT->imports = COMP->importCache;
423 CTXT->imports->addref();
424 CTXT->setParent(parentCtxt);
425 if (instr.contextCache != -1)
426 CTXT->setIdPropertyData(COMP->contextCaches.at(instr.contextCache));
427 if (instr.compiledBinding != -1) {
428 const char *v4data = DATAS.at(instr.compiledBinding).constData();
429 CTXT->v4bindings = new QV4Bindings(v4data, CTXT, COMP);
431 if (states.count() == 1) {
433 rootContext->activeVMEData = data;
435 if (states.count() == 1 && !creationContext.isNull()) {
436 // A component that is logically created within another component instance shares the
437 // same instances of script imports. For example:
439 // import QtQuick 1.0
440 // import "test.js" as Test
442 // model: Test.getModel()
443 // delegate: Component {
444 // Text { text: Test.getValue(index); }
448 // Has the same "Test" instance. To implement this, we simply copy the v8 handles into
449 // the inner context. We have to create a fresh persistent handle for each to prevent
450 // double dispose. It is possible we could do this more efficiently using some form of
451 // referencing instead.
452 CTXT->importedScripts = creationContext->importedScripts;
453 for (int ii = 0; ii < CTXT->importedScripts.count(); ++ii)
454 CTXT->importedScripts[ii] = qPersistentNew<v8::Object>(CTXT->importedScripts[ii]);
458 QML_BEGIN_INSTR(DeferInit)
459 QML_END_INSTR(DeferInit)
461 QML_BEGIN_INSTR(Done)
464 if (states.isEmpty())
468 QML_BEGIN_INSTR(CreateQMLObject)
469 const QDeclarativeCompiledData::TypeReference &type = TYPES.at(instr.type);
470 Q_ASSERT(type.component);
472 states.push(State());
474 State *cState = &states[states.count() - 2];
475 State *nState = &states[states.count() - 1];
477 nState->context = cState->context;
478 nState->compiledData = type.component;
479 nState->instructionStream = type.component->bytecode.constData();
481 if (instr.bindingBits != -1) {
482 const QByteArray &bits = cState->compiledData->datas.at(instr.bindingBits);
483 nState->bindingSkipList = QBitField((const quint32*)bits.constData(),
487 nState->bindingSkipList = nState->bindingSkipList.united(cState->bindingSkipList);
489 // As the state in the state stack changed, execution will continue in the new program.
490 QML_END_INSTR(CreateQMLObject)
492 QML_BEGIN_INSTR(CompleteQMLObject)
493 QObject *o = objects.top();
495 QDeclarativeData *ddata = QDeclarativeData::get(o);
499 if (ddata->context) {
500 Q_ASSERT(ddata->context != CTXT);
501 Q_ASSERT(ddata->outerContext);
502 Q_ASSERT(ddata->outerContext != CTXT);
503 QDeclarativeContextData *c = ddata->context;
504 while (c->linkedContext) c = c->linkedContext;
505 c->linkedContext = CTXT;
510 ddata->ownContext = true;
511 } else if (!ddata->context) {
515 ddata->setImplicitDestructible();
516 ddata->outerContext = CTXT;
517 ddata->lineNumber = instr.line;
518 ddata->columnNumber = instr.column;
519 QML_END_INSTR(CompleteQMLObject)
521 QML_BEGIN_INSTR(CreateCppObject)
522 const QDeclarativeCompiledData::TypeReference &type = TYPES.at(instr.type);
527 type.type->create(&o, &memory, sizeof(QDeclarativeData));
528 QDeclarativeData *ddata = new (memory) QDeclarativeData;
529 ddata->ownMemory = false;
530 QObjectPrivate::get(o)->declarativeData = ddata;
532 if (type.typePropertyCache && !ddata->propertyCache) {
533 ddata->propertyCache = type.typePropertyCache;
534 ddata->propertyCache->addref();
538 VME_EXCEPTION(tr("Unable to create object of type %1").arg(type.className), instr.line);
541 if (ddata->context) {
542 Q_ASSERT(ddata->context != CTXT);
543 Q_ASSERT(ddata->outerContext);
544 Q_ASSERT(ddata->outerContext != CTXT);
545 QDeclarativeContextData *c = ddata->context;
546 while (c->linkedContext) c = c->linkedContext;
547 c->linkedContext = CTXT;
552 ddata->ownContext = true;
553 } else if (!ddata->context) {
557 ddata->setImplicitDestructible();
558 ddata->outerContext = CTXT;
559 ddata->lineNumber = instr.line;
560 ddata->columnNumber = instr.column;
562 if (instr.data != -1) {
563 QDeclarativeCustomParser *customParser =
564 TYPES.at(instr.type).type->customParser();
565 customParser->setCustomData(o, DATAS.at(instr.data));
567 if (!objects.isEmpty()) {
568 QObject *parent = objects.top();
569 #if 0 // ### refactor
570 if (o->isWidgetType() && parent->isWidgetType())
571 static_cast<QWidget*>(o)->setParent(static_cast<QWidget*>(parent));
574 QDeclarative_setParent_noEvent(o, parent);
577 QML_END_INSTR(CreateCppObject)
579 QML_BEGIN_INSTR(CreateSimpleObject)
580 QObject *o = (QObject *)operator new(instr.typeSize + sizeof(QDeclarativeData));
581 ::memset(o, 0, instr.typeSize + sizeof(QDeclarativeData));
584 QDeclarativeData *ddata = (QDeclarativeData *)(((const char *)o) + instr.typeSize);
585 const QDeclarativeCompiledData::TypeReference &ref = TYPES.at(instr.type);
586 if (!ddata->propertyCache && ref.typePropertyCache) {
587 ddata->propertyCache = ref.typePropertyCache;
588 ddata->propertyCache->addref();
590 ddata->lineNumber = instr.line;
591 ddata->columnNumber = instr.column;
593 QObjectPrivate::get(o)->declarativeData = ddata;
594 ddata->context = ddata->outerContext = CTXT;
595 ddata->nextContextObject = CTXT->contextObjects;
596 if (ddata->nextContextObject)
597 ddata->nextContextObject->prevContextObject = &ddata->nextContextObject;
598 ddata->prevContextObject = &CTXT->contextObjects;
599 CTXT->contextObjects = ddata;
601 QObject *parent = objects.top();
602 QDeclarative_setParent_noEvent(o, parent);
605 QML_END_INSTR(CreateSimpleObject)
607 QML_BEGIN_INSTR(SetId)
608 QObject *target = objects.top();
609 CTXT->setIdProperty(instr.index, target);
612 QML_BEGIN_INSTR(SetDefault)
613 CTXT->contextObject = objects.top();
614 QML_END_INSTR(SetDefault)
616 QML_BEGIN_INSTR(CreateComponent)
617 QDeclarativeComponent *qcomp =
618 new QDeclarativeComponent(CTXT->engine, COMP, INSTRUCTIONSTREAM - COMP->bytecode.constData(),
619 objects.isEmpty() ? 0 : objects.top());
621 QDeclarativeData *ddata = QDeclarativeData::get(qcomp, true);
624 CTXT->addObject(qcomp);
627 ddata->ownContext = true;
629 ddata->setImplicitDestructible();
630 ddata->outerContext = CTXT;
631 ddata->lineNumber = instr.line;
632 ddata->columnNumber = instr.column;
634 QDeclarativeComponentPrivate::get(qcomp)->creationContext = CTXT;
637 INSTRUCTIONSTREAM += instr.count;
638 QML_END_INSTR(CreateComponent)
640 QML_BEGIN_INSTR(StoreMetaObject)
641 QObject *target = objects.top();
644 const QByteArray &metadata = DATAS.at(instr.data);
645 QFastMetaBuilder::fromData(&mo, 0, metadata);
647 const QDeclarativeVMEMetaData *data =
648 (const QDeclarativeVMEMetaData *)DATAS.at(instr.aliasData).constData();
650 (void)new QDeclarativeVMEMetaObject(target, &mo, data, COMP);
652 if (instr.propertyCache != -1) {
653 QDeclarativeData *ddata = QDeclarativeData::get(target, true);
654 if (ddata->propertyCache) ddata->propertyCache->release();
655 ddata->propertyCache = PROPERTYCACHES.at(instr.propertyCache);
656 ddata->propertyCache->addref();
658 QML_END_INSTR(StoreMetaObject)
660 QML_BEGIN_INSTR(AssignCustomType)
661 QObject *target = objects.top();
662 CLEAN_PROPERTY(target, instr.propertyIndex);
664 const QString &primitive = PRIMITIVES.at(instr.primitive);
665 int type = instr.type;
666 QDeclarativeMetaType::StringConverter converter = QDeclarativeMetaType::customStringConverter(type);
667 QVariant v = (*converter)(primitive);
670 target->metaObject()->property(instr.propertyIndex);
671 if (v.isNull() || ((int)prop.type() != type && prop.userType() != type))
672 VME_EXCEPTION(tr("Cannot assign value %1 to property %2").arg(primitive).arg(QString::fromUtf8(prop.name())), instr.line);
674 void *a[] = { (void *)v.data(), 0, &status, &flags };
675 QMetaObject::metacall(target, QMetaObject::WriteProperty,
676 instr.propertyIndex, a);
677 QML_END_INSTR(AssignCustomType)
679 QML_BEGIN_INSTR(AssignSignalObject)
682 QObject *assign = objects.pop();
683 QObject *target = objects.top();
684 int sigIdx = instr.signal;
685 const QString &pr = PRIMITIVES.at(sigIdx);
687 QDeclarativeProperty prop(target, pr);
688 if (prop.type() & QDeclarativeProperty::SignalProperty) {
690 QMetaMethod method = QDeclarativeMetaType::defaultMethod(assign);
691 if (method.signature() == 0)
692 VME_EXCEPTION(tr("Cannot assign object type %1 with no default method").arg(QString::fromLatin1(assign->metaObject()->className())), instr.line);
694 if (!QMetaObject::checkConnectArgs(prop.method().signature(), method.signature()))
695 VME_EXCEPTION(tr("Cannot connect mismatched signal/slot %1 %vs. %2").arg(QString::fromLatin1(method.signature())).arg(QString::fromLatin1(prop.method().signature())), instr.line);
697 QDeclarativePropertyPrivate::connect(target, prop.index(), assign, method.methodIndex());
700 VME_EXCEPTION(tr("Cannot assign an object to signal property %1").arg(pr), instr.line);
704 QML_END_INSTR(AssignSignalObject)
706 QML_BEGIN_INSTR(StoreSignal)
707 QObject *target = objects.top();
708 QObject *context = objects.at(objects.count() - 1 - instr.context);
710 QMetaMethod signal = target->metaObject()->method(instr.signalIndex);
712 QDeclarativeBoundSignal *bs = new QDeclarativeBoundSignal(target, signal, target);
713 QDeclarativeExpression *expr =
714 new QDeclarativeExpression(CTXT, context, PRIMITIVES.at(instr.value), true, COMP->name, instr.line, instr.column, *new QDeclarativeExpressionPrivate);
715 bs->setExpression(expr);
716 QML_END_INSTR(StoreSignal)
718 QML_BEGIN_INSTR(StoreImportedScript)
719 CTXT->importedScripts << run(CTXT, SCRIPTS.at(instr.value));
720 QML_END_INSTR(StoreImportedScript)
722 QML_BEGIN_INSTR(StoreScriptString)
723 QObject *target = objects.top();
724 QObject *scope = objects.at(objects.count() - 1 - instr.scope);
725 QDeclarativeScriptString ss;
726 ss.setContext(CTXT->asQDeclarativeContext());
727 ss.setScopeObject(scope);
728 ss.setScript(PRIMITIVES.at(instr.value));
729 ss.d.data()->bindingId = instr.bindingId;
730 ss.d.data()->lineNumber = instr.line;
731 ss.d.data()->columnNumber = instr.column;
733 void *a[] = { &ss, 0, &status, &flags };
734 QMetaObject::metacall(target, QMetaObject::WriteProperty,
735 instr.propertyIndex, a);
736 QML_END_INSTR(StoreScriptString)
738 QML_BEGIN_INSTR(BeginObject)
739 QObject *target = objects.top();
740 QDeclarativeParserStatus *status = reinterpret_cast<QDeclarativeParserStatus *>(reinterpret_cast<char *>(target) + instr.castValue);
741 parserStatus.push(status);
742 #ifdef QML_ENABLE_TRACE
743 Q_ASSERT(QObjectPrivate::get(target)->declarativeData);
744 parserStatusData.push(static_cast<QDeclarativeData *>(QObjectPrivate::get(target)->declarativeData));
746 status->d = &parserStatus.top();
748 status->classBegin();
749 QML_END_INSTR(BeginObject)
751 QML_BEGIN_INSTR(InitV8Bindings)
752 CTXT->v8bindings = new QV8Bindings(PRIMITIVES.at(instr.program), instr.programIndex,
753 instr.line, COMP, CTXT);
754 QML_END_INSTR(InitV8Bindings)
756 QML_BEGIN_INSTR(StoreBinding)
758 objects.at(objects.count() - 1 - instr.owner);
760 objects.at(objects.count() - 1 - instr.context);
762 if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
763 QML_NEXT_INSTR(StoreBinding);
765 QDeclarativeBinding *bind = new QDeclarativeBinding(PRIMITIVES.at(instr.value), true,
766 context, CTXT, COMP->name, instr.line,
768 bindValues.push(bind);
769 bind->m_mePtr = &bindValues.top();
770 bind->setTarget(target, instr.property, CTXT);
772 bind->addToObject(target, QDeclarativePropertyPrivate::bindingIndex(instr.property));
773 QML_END_INSTR(StoreBinding)
775 QML_BEGIN_INSTR(StoreBindingOnAlias)
777 objects.at(objects.count() - 1 - instr.owner);
779 objects.at(objects.count() - 1 - instr.context);
781 if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
782 QML_NEXT_INSTR(StoreBindingOnAlias);
784 QDeclarativeBinding *bind = new QDeclarativeBinding(PRIMITIVES.at(instr.value), true,
785 context, CTXT, COMP->name, instr.line,
787 bindValues.push(bind);
788 bind->m_mePtr = &bindValues.top();
789 bind->setTarget(target, instr.property, CTXT);
791 QDeclarativeAbstractBinding *old =
792 QDeclarativePropertyPrivate::setBindingNoEnable(target, instr.property.coreIndex,
793 instr.property.getValueTypeCoreIndex(),
795 if (old) { old->destroy(); }
796 QML_END_INSTR(StoreBindingOnAlias)
798 QML_BEGIN_INSTR(StoreV4Binding)
800 objects.at(objects.count() - 1 - instr.owner);
802 objects.at(objects.count() - 1 - instr.context);
804 int property = instr.property;
805 if (instr.isRoot && BINDINGSKIPLIST.testBit(property & 0xFFFF))
806 QML_NEXT_INSTR(StoreV4Binding);
808 QDeclarativeAbstractBinding *binding =
809 CTXT->v4bindings->configBinding(instr.value, target, scope, property,
810 instr.line, instr.column);
811 bindValues.push(binding);
812 binding->m_mePtr = &bindValues.top();
813 binding->addToObject(target, property);
814 QML_END_INSTR(StoreV4Binding)
816 QML_BEGIN_INSTR(StoreV8Binding)
818 objects.at(objects.count() - 1 - instr.owner);
820 objects.at(objects.count() - 1 - instr.context);
822 if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
823 QML_NEXT_INSTR(StoreV8Binding);
825 QDeclarativeAbstractBinding *binding =
826 CTXT->v8bindings->configBinding(instr.value, target, scope,
827 instr.property, instr.line,
829 bindValues.push(binding);
830 binding->m_mePtr = &bindValues.top();
831 binding->addToObject(target, QDeclarativePropertyPrivate::bindingIndex(instr.property));
832 QML_END_INSTR(StoreV8Binding)
834 QML_BEGIN_INSTR(StoreValueSource)
835 QObject *obj = objects.pop();
836 QDeclarativePropertyValueSource *vs = reinterpret_cast<QDeclarativePropertyValueSource *>(reinterpret_cast<char *>(obj) + instr.castValue);
837 QObject *target = objects.at(objects.count() - 1 - instr.owner);
839 obj->setParent(target);
840 vs->setTarget(QDeclarativePropertyPrivate::restore(target, instr.property, CTXT));
841 QML_END_INSTR(StoreValueSource)
843 QML_BEGIN_INSTR(StoreValueInterceptor)
844 QObject *obj = objects.pop();
845 QDeclarativePropertyValueInterceptor *vi = reinterpret_cast<QDeclarativePropertyValueInterceptor *>(reinterpret_cast<char *>(obj) + instr.castValue);
846 QObject *target = objects.at(objects.count() - 1 - instr.owner);
847 QDeclarativeProperty prop =
848 QDeclarativePropertyPrivate::restore(target, instr.property, CTXT);
849 obj->setParent(target);
851 QDeclarativeVMEMetaObject *mo = static_cast<QDeclarativeVMEMetaObject *>((QMetaObject*)target->metaObject());
852 mo->registerInterceptor(prop.index(), QDeclarativePropertyPrivate::valueTypeCoreIndex(prop), vi);
853 QML_END_INSTR(StoreValueInterceptor)
855 QML_BEGIN_INSTR(StoreObjectQList)
856 QObject *assign = objects.pop();
858 const List &list = lists.top();
859 list.qListProperty.append((QDeclarativeListProperty<void>*)&list.qListProperty, assign);
860 QML_END_INSTR(StoreObjectQList)
862 QML_BEGIN_INSTR(AssignObjectList)
863 // This is only used for assigning interfaces
864 QObject *assign = objects.pop();
865 const List &list = lists.top();
867 int type = list.type;
871 const char *iid = QDeclarativeMetaType::interfaceIId(type);
873 ptr = assign->qt_metacast(iid);
875 VME_EXCEPTION(tr("Cannot assign object to list"), instr.line);
878 list.qListProperty.append((QDeclarativeListProperty<void>*)&list.qListProperty, ptr);
879 QML_END_INSTR(AssignObjectList)
881 QML_BEGIN_INSTR(StoreInterface)
882 QObject *assign = objects.pop();
883 QObject *target = objects.top();
884 CLEAN_PROPERTY(target, instr.propertyIndex);
886 int coreIdx = instr.propertyIndex;
887 QMetaProperty prop = target->metaObject()->property(coreIdx);
888 int t = prop.userType();
889 const char *iid = QDeclarativeMetaType::interfaceIId(t);
892 void *ptr = assign->qt_metacast(iid);
894 void *a[] = { &ptr, 0, &status, &flags };
895 QMetaObject::metacall(target,
896 QMetaObject::WriteProperty,
903 VME_EXCEPTION(tr("Cannot assign object to interface property"), instr.line);
904 QML_END_INSTR(StoreInterface)
906 QML_BEGIN_INSTR(FetchAttached)
907 QObject *target = objects.top();
909 QObject *qmlObject = qmlAttachedPropertiesObjectById(instr.id, target);
912 VME_EXCEPTION(tr("Unable to create attached object"), instr.line);
914 objects.push(qmlObject);
915 QML_END_INSTR(FetchAttached)
917 QML_BEGIN_INSTR(FetchQList)
918 QObject *target = objects.top();
920 lists.push(List(instr.type));
923 a[0] = (void *)&(lists.top().qListProperty);
924 QMetaObject::metacall(target, QMetaObject::ReadProperty,
926 QML_END_INSTR(FetchQList)
928 QML_BEGIN_INSTR(FetchObject)
929 QObject *target = objects.top();
932 // NOTE: This assumes a cast to QObject does not alter the
936 QMetaObject::metacall(target, QMetaObject::ReadProperty,
940 VME_EXCEPTION(tr("Cannot set properties on %1 as it is null").arg(QString::fromUtf8(target->metaObject()->property(instr.property).name())), instr.line);
943 QML_END_INSTR(FetchObject)
945 QML_BEGIN_INSTR(PopQList)
947 QML_END_INSTR(PopQList)
949 QML_BEGIN_INSTR(Defer)
950 if (instr.deferCount) {
951 QObject *target = objects.top();
952 QDeclarativeData *data =
953 QDeclarativeData::get(target, true);
955 data->deferredComponent = COMP;
956 data->deferredIdx = INSTRUCTIONSTREAM - COMP->bytecode.constData();
957 INSTRUCTIONSTREAM += instr.deferCount;
961 QML_BEGIN_INSTR(PopFetchedObject)
963 QML_END_INSTR(PopFetchedObject)
965 QML_BEGIN_INSTR(FetchValueType)
966 QObject *target = objects.top();
968 if (instr.bindingSkipList != 0) {
969 // Possibly need to clear bindings
970 QDeclarativeData *targetData = QDeclarativeData::get(target);
972 QDeclarativeAbstractBinding *binding =
973 QDeclarativePropertyPrivate::binding(target, instr.property, -1);
975 if (binding && binding->bindingType() != QDeclarativeAbstractBinding::ValueTypeProxy) {
976 QDeclarativePropertyPrivate::setBinding(target, instr.property, -1, 0);
978 } else if (binding) {
979 QDeclarativeValueTypeProxyBinding *proxy =
980 static_cast<QDeclarativeValueTypeProxyBinding *>(binding);
981 proxy->removeBindings(instr.bindingSkipList);
986 QDeclarativeValueType *valueHandler = ep->valueTypes[instr.type];
987 valueHandler->read(target, instr.property);
988 objects.push(valueHandler);
989 QML_END_INSTR(FetchValueType)
991 QML_BEGIN_INSTR(PopValueType)
992 QDeclarativeValueType *valueHandler =
993 static_cast<QDeclarativeValueType *>(objects.pop());
994 QObject *target = objects.top();
995 valueHandler->write(target, instr.property, QDeclarativePropertyPrivate::BypassInterceptor);
996 QML_END_INSTR(PopValueType)
998 #ifdef QML_THREADED_VME_INTERPRETER
1002 qFatal("QDeclarativeCompiledData: Internal error - unknown instruction %d", genericInstr->common.instructionType);
1009 Q_ASSERT(!states.isEmpty());
1010 Q_ASSERT(!errors->isEmpty());
1017 Q_ASSERT(objects.count() == 1);
1019 QObject *rv = objects.top();
1021 objects.deallocate();
1028 void QDeclarativeVME::reset()
1030 Q_ASSERT(!states.isEmpty() || objects.isEmpty());
1032 QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
1034 if (!objects.isEmpty() && !(states.at(0).flags & State::Deferred))
1035 delete objects.at(0);
1037 if (!rootContext.isNull())
1038 rootContext->activeVMEData = 0;
1040 // Remove the QDeclarativeParserStatus and QDeclarativeAbstractBinding back pointers
1041 blank(parserStatus);
1044 while (componentAttached) {
1045 QDeclarativeComponentAttached *a = componentAttached;
1050 objects.deallocate();
1052 bindValues.deallocate();
1053 parserStatus.deallocate();
1054 #ifdef QML_ENABLE_TRACE
1055 parserStatusData.deallocate();
1057 finalizeCallbacks.clear();
1060 creationContext = 0;
1063 // Must be called with a handle scope and context
1064 void QDeclarativeScriptData::initialize(QDeclarativeEngine *engine)
1066 Q_ASSERT(m_program.IsEmpty());
1068 Q_ASSERT(!hasEngine());
1070 QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
1071 QV8Engine *v8engine = ep->v8engine();
1073 // If compilation throws an error, a surrounding v8::TryCatch will record it.
1074 v8::Local<v8::Script> program = v8engine->qmlModeCompile(m_programSource, url.toString(), 1);
1075 if (program.IsEmpty())
1078 m_program = qPersistentNew<v8::Script>(program);
1080 addToEngine(engine);
1085 v8::Persistent<v8::Object> QDeclarativeVME::run(QDeclarativeContextData *parentCtxt, QDeclarativeScriptData *script)
1087 if (script->m_loaded)
1088 return qPersistentNew<v8::Object>(script->m_value);
1090 Q_ASSERT(parentCtxt && parentCtxt->engine);
1091 QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(parentCtxt->engine);
1092 QV8Engine *v8engine = ep->v8engine();
1094 bool shared = script->pragmas & QDeclarativeScript::Object::ScriptBlock::Shared;
1096 QDeclarativeContextData *effectiveCtxt = parentCtxt;
1100 // Create the script context if required
1101 QDeclarativeContextData *ctxt = new QDeclarativeContextData;
1102 ctxt->isInternal = true;
1103 ctxt->isJSContext = true;
1105 ctxt->isPragmaLibraryContext = true;
1107 ctxt->isPragmaLibraryContext = parentCtxt->isPragmaLibraryContext;
1108 ctxt->url = script->url;
1110 // For backward compatibility, if there are no imports, we need to use the
1111 // imports from the parent context. See QTBUG-17518.
1112 if (!script->importCache->isEmpty()) {
1113 ctxt->imports = script->importCache;
1114 } else if (effectiveCtxt) {
1115 ctxt->imports = effectiveCtxt->imports;
1116 ctxt->importedScripts = effectiveCtxt->importedScripts;
1117 for (int ii = 0; ii < ctxt->importedScripts.count(); ++ii)
1118 ctxt->importedScripts[ii] = qPersistentNew<v8::Object>(ctxt->importedScripts[ii]);
1121 if (ctxt->imports) {
1122 ctxt->imports->addref();
1125 if (effectiveCtxt) {
1126 ctxt->setParent(effectiveCtxt, true);
1128 ctxt->engine = parentCtxt->engine; // Fix for QTBUG-21620
1131 for (int ii = 0; ii < script->scripts.count(); ++ii) {
1132 ctxt->importedScripts << run(ctxt, script->scripts.at(ii)->scriptData());
1135 v8::HandleScope handle_scope;
1136 v8::Context::Scope scope(v8engine->context());
1138 v8::TryCatch try_catch;
1139 if (!script->isInitialized())
1140 script->initialize(parentCtxt->engine);
1142 v8::Local<v8::Object> qmlglobal = v8engine->qmlScope(ctxt, 0);
1144 if (!script->m_program.IsEmpty()) {
1145 script->m_program->Run(qmlglobal);
1147 // Compilation failed.
1148 Q_ASSERT(try_catch.HasCaught());
1151 v8::Persistent<v8::Object> rv;
1153 if (try_catch.HasCaught()) {
1154 v8::Local<v8::Message> message = try_catch.Message();
1155 if (!message.IsEmpty()) {
1156 QDeclarativeError error;
1157 QDeclarativeExpressionPrivate::exceptionToError(message, error);
1162 rv = qPersistentNew<v8::Object>(qmlglobal);
1164 script->m_value = qPersistentNew<v8::Object>(qmlglobal);
1165 script->m_loaded = true;
1171 #ifdef QML_THREADED_VME_INTERPRETER
1172 void **QDeclarativeVME::instructionJumpTable()
1174 static void **jumpTable = 0;
1176 QDeclarativeVME dummy;
1177 QDeclarativeVME::Interrupt i;
1178 dummy.run(0, i, &jumpTable);
1184 QDeclarativeContextData *QDeclarativeVME::complete(const Interrupt &interrupt)
1187 (bindValues.isEmpty() &&
1188 parserStatus.isEmpty() &&
1189 componentAttached == 0 &&
1190 rootContext.isNull() &&
1191 finalizeCallbacks.isEmpty()));
1196 QDeclarativeTrace trace("VME Complete");
1197 #ifdef QML_ENABLE_TRACE
1198 trace.addDetail("URL", rootComponent->url);
1201 ActiveVMERestorer restore(this, QDeclarativeEnginePrivate::get(engine));
1202 QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
1205 QDeclarativeTrace trace("VME Binding Enable");
1206 trace.event("begin binding eval");
1207 while (!bindValues.isEmpty()) {
1208 QDeclarativeAbstractBinding *b = bindValues.pop();
1212 b->setEnabled(true, QDeclarativePropertyPrivate::BypassInterceptor |
1213 QDeclarativePropertyPrivate::DontRemoveBinding);
1216 if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1219 bindValues.deallocate();
1223 QDeclarativeTrace trace("VME Component Complete");
1224 while (!parserStatus.isEmpty()) {
1225 QDeclarativeParserStatus *status = parserStatus.pop();
1226 #ifdef QML_ENABLE_TRACE
1227 QDeclarativeData *data = parserStatusData.pop();
1230 if (status && status->d) {
1232 #ifdef QML_ENABLE_TRACE
1233 QDeclarativeTrace trace("Component complete");
1234 trace.addDetail("URL", data->outerContext->url);
1235 trace.addDetail("Line", data->lineNumber);
1237 status->componentComplete();
1240 if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1243 parserStatus.deallocate();
1247 QDeclarativeTrace trace("VME Finalize Callbacks");
1248 for (int ii = 0; ii < finalizeCallbacks.count(); ++ii) {
1249 QDeclarativeEnginePrivate::FinalizeCallback callback = finalizeCallbacks.at(ii);
1250 QObject *obj = callback.first;
1252 void *args[] = { 0 };
1253 QMetaObject::metacall(obj, QMetaObject::InvokeMetaMethod, callback.second, args);
1255 if (watcher.hasRecursed())
1258 finalizeCallbacks.clear();
1262 QDeclarativeTrace trace("VME Component.onCompleted Callbacks");
1263 while (componentAttached) {
1264 QDeclarativeComponentAttached *a = componentAttached;
1266 QDeclarativeData *d = QDeclarativeData::get(a->parent());
1268 Q_ASSERT(d->context);
1269 a->add(&d->context->componentAttached);
1270 emit a->completed();
1272 if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1277 QDeclarativeContextData *rv = rootContext;
1281 if (rv) rv->activeVMEData = data;
1286 void QDeclarativeVME::blank(QFiniteStack<QDeclarativeAbstractBinding *> &bs)
1288 for (int ii = 0; ii < bs.count(); ++ii) {
1289 QDeclarativeAbstractBinding *b = bs.at(ii);
1290 if (b) b->m_mePtr = 0;
1294 void QDeclarativeVME::blank(QFiniteStack<QDeclarativeParserStatus *> &pss)
1296 for (int ii = 0; ii < pss.count(); ++ii) {
1297 QDeclarativeParserStatus *ps = pss.at(ii);
1302 QDeclarativeVMEGuard::QDeclarativeVMEGuard()
1303 : m_objectCount(0), m_objects(0), m_contextCount(0), m_contexts(0)
1307 QDeclarativeVMEGuard::~QDeclarativeVMEGuard()
1312 void QDeclarativeVMEGuard::guard(QDeclarativeVME *vme)
1316 m_objectCount = vme->objects.count();
1317 m_objects = new QDeclarativeGuard<QObject>[m_objectCount];
1318 for (int ii = 0; ii < m_objectCount; ++ii)
1319 m_objects[ii] = vme->objects[ii];
1321 m_contextCount = (vme->rootContext.isNull()?0:1) + vme->states.count();
1322 m_contexts = new QDeclarativeGuardedContextData[m_contextCount];
1323 for (int ii = 0; ii < vme->states.count(); ++ii)
1324 m_contexts[ii] = vme->states.at(ii).context;
1325 if (!vme->rootContext.isNull())
1326 m_contexts[m_contextCount - 1] = vme->rootContext.contextData();
1329 void QDeclarativeVMEGuard::clear()
1331 delete [] m_objects;
1332 delete [] m_contexts;
1340 bool QDeclarativeVMEGuard::isOK() const
1342 for (int ii = 0; ii < m_objectCount; ++ii)
1343 if (m_objects[ii].isNull())
1346 for (int ii = 0; ii < m_contextCount; ++ii)
1347 if (m_contexts[ii].isNull())