src/declarative/qml/qdeclarativevme.cpp

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  41
  42 #include "qdeclarativevme_p.h"
  43
  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"
  69
  70 #include <QStack>
  71 #include <QColor>
  72 #include <QPointF>
  73 #include <QSizeF>
  74 #include <QRectF>
  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>
  81
  82 QT_BEGIN_NAMESPACE
  83
  84 using namespace QDeclarativeVMETypes;
  85
  86 #define VME_EXCEPTION(desc, line) \
  87     { \
  88         QDeclarativeError error; \
  89         error.setDescription(desc.trimmed()); \
  90         error.setLine(line); \
  91         error.setUrl(COMP->url); \
  92         *errors << error; \
  93         goto exceptionExit; \
  94     }
  95
  96 void QDeclarativeVME::init(QDeclarativeContextData *ctxt, QDeclarativeCompiledData *comp, int start,
  97                            QDeclarativeContextData *creation)
  98 {
  99     Q_ASSERT(ctxt);
 100     Q_ASSERT(comp);
 101
 102     if (start == -1) {
 103         start = 0;
 104     } else {
 105         creationContext = creation;
 106     }
 107
 108     State initState;
 109     initState.context = ctxt;
 110     initState.compiledData = comp;
 111     initState.instructionStream = comp->bytecode.constData() + start;
 112     states.push(initState);
 113
 114     typedef QDeclarativeInstruction I;
 115     I *i = (I *)initState.instructionStream;
 116
 117     Q_ASSERT(comp->instructionType(i) == I::Init);
 118
 119     objects.allocate(i->init.objectStackSize);
 120     lists.allocate(i->init.listStackSize);
 121     bindValues.allocate(i->init.bindingsSize);
 122     parserStatus.allocate(i->init.parserStatusSize);
 123
 124 #ifdef QML_ENABLE_TRACE
 125     parserStatusData.allocate(i->init.parserStatusSize);
 126     rootComponent = comp;
 127 #endif
 128
 129     rootContext = 0;
 130     engine = ctxt->engine;
 131 }
 132
 133 bool QDeclarativeVME::initDeferred(QObject *object)
 134 {
 135     QDeclarativeData *data = QDeclarativeData::get(object);
 136
 137     if (!data || !data->context || !data->deferredComponent)
 138         return false;
 139
 140     QDeclarativeContextData *ctxt = data->context;
 141     QDeclarativeCompiledData *comp = data->deferredComponent;
 142     int start = data->deferredIdx;
 143
 144     State initState;
 145     initState.flags = State::Deferred;
 146     initState.context = ctxt;
 147     initState.compiledData = comp;
 148     initState.instructionStream = comp->bytecode.constData() + start;
 149     states.push(initState);
 150
 151     typedef QDeclarativeInstruction I;
 152     I *i = (I *)initState.instructionStream;
 153
 154     Q_ASSERT(comp->instructionType(i) == I::DeferInit);
 155
 156     objects.allocate(i->deferInit.objectStackSize);
 157     lists.allocate(i->deferInit.listStackSize);
 158     bindValues.allocate(i->deferInit.bindingsSize);
 159     parserStatus.allocate(i->deferInit.parserStatusSize);
 160
 161     objects.push(object);
 162
 163 #ifdef QML_ENABLE_TRACE
 164     parserStatusData.allocate(i->deferInit.parserStatusSize);
 165     rootComponent = comp;
 166 #endif
 167
 168     rootContext = 0;
 169     engine = ctxt->engine;
 170
 171     return true;
 172 }
 173
 174 namespace {
 175 struct ActiveVMERestorer
 176 {
 177     ActiveVMERestorer(QDeclarativeVME *me, QDeclarativeEnginePrivate *ep)
 178     : ep(ep), oldVME(ep->activeVME) { ep->activeVME = me; }
 179     ~ActiveVMERestorer() { ep->activeVME = oldVME; }
 180
 181     QDeclarativeEnginePrivate *ep;
 182     QDeclarativeVME *oldVME;
 183 };
 184 }
 185
 186 QObject *QDeclarativeVME::execute(QList<QDeclarativeError> *errors, const Interrupt &interrupt)
 187 {
 188     Q_ASSERT(states.count() >= 1);
 189
 190 #ifdef QML_ENABLE_TRACE
 191     QDeclarativeTrace trace("VME Execute");
 192     trace.addDetail("URL", rootComponent->url);
 193 #endif
 194
 195     QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(states.at(0).context->engine);
 196
 197     ActiveVMERestorer restore(this, ep);
 198
 199     QObject *rv = run(errors, interrupt);
 200
 201     return rv;
 202 }
 203
 204 inline bool fastHasBinding(QObject *o, int index)
 205 {
 206     QDeclarativeData *ddata = static_cast<QDeclarativeData *>(QObjectPrivate::get(o)->declarativeData);
 207
 208     return ddata && (ddata->bindingBitsSize > index) &&
 209            (ddata->bindingBits[index / 32] & (1 << (index % 32)));
 210 }
 211
 212 static void removeBindingOnProperty(QObject *o, int index)
 213 {
 214     QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::setBinding(o, index, -1, 0);
 215     if (binding) binding->destroy();
 216 }
 217
 218 static QVariant variantFromString(const QString &string)
 219 {
 220     return QDeclarativeStringConverters::variantFromString(string);
 221 }
 222
 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; \
 228     Q_UNUSED(instr);
 229
 230 #ifdef QML_THREADED_VME_INTERPRETER
 231 #  define QML_BEGIN_INSTR(I) op_##I: \
 232     QML_BEGIN_INSTR_COMMON(I)
 233
 234 #  define QML_NEXT_INSTR(I) { \
 235     if (watcher.hasRecursed()) return 0; \
 236     genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM); \
 237     goto *genericInstr->common.code; \
 238     }
 239
 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;
 245
 246 #else
 247 #  define QML_BEGIN_INSTR(I) \
 248     case QDeclarativeInstruction::I: \
 249     QML_BEGIN_INSTR_COMMON(I)
 250
 251 #  define QML_NEXT_INSTR(I) { \
 252     if (watcher.hasRecursed()) return 0; \
 253     break; \
 254     }
 255
 256 #  define QML_END_INSTR(I) \
 257     if (watcher.hasRecursed() || interrupt.shouldInterrupt()) return 0; \
 258     } break;
 259 #endif
 260
 261 #define QML_STORE_VALUE(name, cpptype, value) \
 262     QML_BEGIN_INSTR(name) \
 263         cpptype v = value; \
 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); \
 268     QML_END_INSTR(name)
 269
 270 #define QML_STORE_LIST(name, cpptype, value) \
 271     QML_BEGIN_INSTR(name) \
 272         cpptype v; \
 273         v.append(value); \
 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); \
 278     QML_END_INSTR(name)
 279
 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); \
 288     QML_END_INSTR(name)
 289
 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); \
 296     QML_END_INSTR(name)
 297
 298 #define CLEAN_PROPERTY(o, index) \
 299     if (fastHasBinding(o, index)) \
 300         removeBindingOnProperty(o, index)
 301
 302 QObject *QDeclarativeVME::run(QList<QDeclarativeError> *errors,
 303                               const Interrupt &interrupt
 304 #ifdef QML_THREADED_VME_INTERPRETER
 305                               , void ***storeJumpTable
 306 #endif
 307                               )
 308 {
 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)
 314         };
 315 #undef QML_INSTR_ADDR
 316         *storeJumpTable = jumpTable;
 317         return 0;
 318     }
 319 #endif
 320     Q_ASSERT(errors->isEmpty());
 321     Q_ASSERT(states.count() >= 1);
 322
 323     QDeclarativeEngine *engine = states.at(0).context->engine;
 324     QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
 325
 326     // Need a v8 handle scope and execution context for StoreVar instructions.
 327     v8::HandleScope handleScope;
 328     v8::Context::Scope contextScope(ep->v8engine()->context());
 329
 330     int status = -1; // needed for dbus
 331     QDeclarativePropertyPrivate::WriteFlags flags = QDeclarativePropertyPrivate::BypassInterceptor |
 332                                                     QDeclarativePropertyPrivate::RemoveBindingOnAliasWrite;
 333
 334     QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
 335
 336 #define COMP states.top().compiledData
 337 #define CTXT states.top().context
 338 #define INSTRUCTIONSTREAM states.top().instructionStream
 339 #define BINDINGSKIPLIST states.top().bindingSkipList
 340
 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
 347
 348 #ifdef QML_THREADED_VME_INTERPRETER
 349     const QDeclarativeInstruction *genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM);
 350     goto *genericInstr->common.code;
 351 #else
 352     for (;;) {
 353         const QDeclarativeInstruction *genericInstr = reinterpret_cast<const QDeclarativeInstruction *>(INSTRUCTIONSTREAM);
 354
 355         switch (genericInstr->common.instructionType) {
 356 #endif
 357
 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()));
 362
 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,
 389                                                     instr.n));
 390         QML_STORE_VALUE(StoreTrIdString, QString, qtTrId(DATAS.at(instr.text).constData(), instr.n));
 391
 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);
 399
 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));
 405
 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));
 412
 413
 414         QML_BEGIN_INSTR(Init)
 415             // Ensure that the compiled data has been initialized
 416             if (!COMP->isInitialized()) COMP->initialize(engine);
 417
 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);
 430             }
 431             if (states.count() == 1) {
 432                 rootContext = CTXT;
 433                 rootContext->activeVMEData = data;
 434             }
 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:
 438                 //
 439                 //     import QtQuick 1.0
 440                 //     import "test.js" as Test
 441                 //     ListView {
 442                 //         model: Test.getModel()
 443                 //         delegate: Component {
 444                 //             Text { text: Test.getValue(index); }
 445                 //         }
 446                 //     }
 447                 //
 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]);
 455             }
 456         QML_END_INSTR(Init)
 457
 458         QML_BEGIN_INSTR(DeferInit)
 459         QML_END_INSTR(DeferInit)
 460
 461         QML_BEGIN_INSTR(Done)
 462             states.pop();
 463
 464             if (states.isEmpty())
 465                 goto normalExit;
 466         QML_END_INSTR(Done)
 467
 468         QML_BEGIN_INSTR(CreateQMLObject)
 469             const QDeclarativeCompiledData::TypeReference &type = TYPES.at(instr.type);
 470             Q_ASSERT(type.component);
 471
 472             states.push(State());
 473
 474             State *cState = &states[states.count() - 2];
 475             State *nState = &states[states.count() - 1];
 476
 477             nState->context = cState->context;
 478             nState->compiledData = type.component;
 479             nState->instructionStream = type.component->bytecode.constData();
 480
 481             if (instr.bindingBits != -1) {
 482                 const QByteArray &bits = cState->compiledData->datas.at(instr.bindingBits);
 483                 nState->bindingSkipList = QBitField((const quint32*)bits.constData(),
 484                                                     bits.size() * 8);
 485             }
 486             if (instr.isRoot)
 487                 nState->bindingSkipList = nState->bindingSkipList.united(cState->bindingSkipList);
 488
 489             // As the state in the state stack changed, execution will continue in the new program.
 490         QML_END_INSTR(CreateQMLObject)
 491
 492         QML_BEGIN_INSTR(CompleteQMLObject)
 493             QObject *o = objects.top();
 494
 495             QDeclarativeData *ddata = QDeclarativeData::get(o);
 496             Q_ASSERT(ddata);
 497
 498             if (instr.isRoot) {
 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;
 506                 } else {
 507                     CTXT->addObject(o);
 508                 }
 509
 510                 ddata->ownContext = true;
 511             } else if (!ddata->context) {
 512                 CTXT->addObject(o);
 513             }
 514
 515             ddata->setImplicitDestructible();
 516             ddata->outerContext = CTXT;
 517             ddata->lineNumber = instr.line;
 518             ddata->columnNumber = instr.column;
 519         QML_END_INSTR(CompleteQMLObject)
 520
 521         QML_BEGIN_INSTR(CreateCppObject)
 522             const QDeclarativeCompiledData::TypeReference &type = TYPES.at(instr.type);
 523             Q_ASSERT(type.type);
 524
 525             QObject *o = 0;
 526             void *memory = 0;
 527             type.type->create(&o, &memory, sizeof(QDeclarativeData));
 528             QDeclarativeData *ddata = new (memory) QDeclarativeData;
 529             ddata->ownMemory = false;
 530             QObjectPrivate::get(o)->declarativeData = ddata;
 531
 532             if (type.typePropertyCache && !ddata->propertyCache) {
 533                 ddata->propertyCache = type.typePropertyCache;
 534                 ddata->propertyCache->addref();
 535             }
 536
 537             if (!o)
 538                 VME_EXCEPTION(tr("Unable to create object of type %1").arg(type.className), instr.line);
 539
 540             if (instr.isRoot) {
 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;
 548                 } else {
 549                     CTXT->addObject(o);
 550                 }
 551
 552                 ddata->ownContext = true;
 553             } else if (!ddata->context) {
 554                 CTXT->addObject(o);
 555             }
 556
 557             ddata->setImplicitDestructible();
 558             ddata->outerContext = CTXT;
 559             ddata->lineNumber = instr.line;
 560             ddata->columnNumber = instr.column;
 561
 562             if (instr.data != -1) {
 563                 QDeclarativeCustomParser *customParser =
 564                     TYPES.at(instr.type).type->customParser();
 565                 customParser->setCustomData(o, DATAS.at(instr.data));
 566             }
 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));
 572                 else
 573 #endif
 574                     QDeclarative_setParent_noEvent(o, parent);
 575             }
 576             objects.push(o);
 577         QML_END_INSTR(CreateCppObject)
 578
 579         QML_BEGIN_INSTR(CreateSimpleObject)
 580             QObject *o = (QObject *)operator new(instr.typeSize + sizeof(QDeclarativeData));
 581             ::memset(o, 0, instr.typeSize + sizeof(QDeclarativeData));
 582             instr.create(o);
 583
 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();
 589             }
 590             ddata->lineNumber = instr.line;
 591             ddata->columnNumber = instr.column;
 592
 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;
 600
 601             QObject *parent = objects.top();
 602             QDeclarative_setParent_noEvent(o, parent);
 603
 604             objects.push(o);
 605         QML_END_INSTR(CreateSimpleObject)
 606
 607         QML_BEGIN_INSTR(SetId)
 608             QObject *target = objects.top();
 609             CTXT->setIdProperty(instr.index, target);
 610         QML_END_INSTR(SetId)
 611
 612         QML_BEGIN_INSTR(SetDefault)
 613             CTXT->contextObject = objects.top();
 614         QML_END_INSTR(SetDefault)
 615
 616         QML_BEGIN_INSTR(CreateComponent)
 617             QDeclarativeComponent *qcomp =
 618                 new QDeclarativeComponent(CTXT->engine, COMP, INSTRUCTIONSTREAM - COMP->bytecode.constData(),
 619                                           objects.isEmpty() ? 0 : objects.top());
 620
 621             QDeclarativeData *ddata = QDeclarativeData::get(qcomp, true);
 622             Q_ASSERT(ddata);
 623
 624             CTXT->addObject(qcomp);
 625
 626             if (instr.isRoot)
 627                 ddata->ownContext = true;
 628
 629             ddata->setImplicitDestructible();
 630             ddata->outerContext = CTXT;
 631             ddata->lineNumber = instr.line;
 632             ddata->columnNumber = instr.column;
 633
 634             QDeclarativeComponentPrivate::get(qcomp)->creationContext = CTXT;
 635
 636             objects.push(qcomp);
 637             INSTRUCTIONSTREAM += instr.count;
 638         QML_END_INSTR(CreateComponent)
 639
 640         QML_BEGIN_INSTR(StoreMetaObject)
 641             QObject *target = objects.top();
 642
 643             QMetaObject mo;
 644             const QByteArray &metadata = DATAS.at(instr.data);
 645             QFastMetaBuilder::fromData(&mo, 0, metadata);
 646
 647             const QDeclarativeVMEMetaData *data =
 648                 (const QDeclarativeVMEMetaData *)DATAS.at(instr.aliasData).constData();
 649
 650             (void)new QDeclarativeVMEMetaObject(target, &mo, data, COMP);
 651
 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();
 657             }
 658         QML_END_INSTR(StoreMetaObject)
 659
 660         QML_BEGIN_INSTR(AssignCustomType)
 661             QObject *target = objects.top();
 662             CLEAN_PROPERTY(target, instr.propertyIndex);
 663
 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);
 668
 669             QMetaProperty prop =
 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);
 673
 674             void *a[] = { (void *)v.data(), 0, &status, &flags };
 675             QMetaObject::metacall(target, QMetaObject::WriteProperty,
 676                                   instr.propertyIndex, a);
 677         QML_END_INSTR(AssignCustomType)
 678
 679         QML_BEGIN_INSTR(AssignSignalObject)
 680             // XXX optimize
 681
 682             QObject *assign = objects.pop();
 683             QObject *target = objects.top();
 684             int sigIdx = instr.signal;
 685             const QString &pr = PRIMITIVES.at(sigIdx);
 686
 687             QDeclarativeProperty prop(target, pr);
 688             if (prop.type() & QDeclarativeProperty::SignalProperty) {
 689
 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);
 693
 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);
 696
 697                 QDeclarativePropertyPrivate::connect(target, prop.index(), assign, method.methodIndex());
 698
 699             } else {
 700                 VME_EXCEPTION(tr("Cannot assign an object to signal property %1").arg(pr), instr.line);
 701             }
 702
 703
 704         QML_END_INSTR(AssignSignalObject)
 705
 706         QML_BEGIN_INSTR(StoreSignal)
 707             QObject *target = objects.top();
 708             QObject *context = objects.at(objects.count() - 1 - instr.context);
 709
 710             QMetaMethod signal = target->metaObject()->method(instr.signalIndex);
 711
 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)
 717
 718         QML_BEGIN_INSTR(StoreImportedScript)
 719             CTXT->importedScripts << run(CTXT, SCRIPTS.at(instr.value));
 720         QML_END_INSTR(StoreImportedScript)
 721
 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;
 732
 733             void *a[] = { &ss, 0, &status, &flags };
 734             QMetaObject::metacall(target, QMetaObject::WriteProperty,
 735                                   instr.propertyIndex, a);
 736         QML_END_INSTR(StoreScriptString)
 737
 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));
 745 #endif
 746             status->d = &parserStatus.top();
 747
 748             status->classBegin();
 749         QML_END_INSTR(BeginObject)
 750
 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)
 755
 756         QML_BEGIN_INSTR(StoreBinding)
 757             QObject *target =
 758                 objects.at(objects.count() - 1 - instr.owner);
 759             QObject *context =
 760                 objects.at(objects.count() - 1 - instr.context);
 761
 762             if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
 763                 QML_NEXT_INSTR(StoreBinding);
 764
 765             QDeclarativeBinding *bind = new QDeclarativeBinding(PRIMITIVES.at(instr.value), true,
 766                                                                 context, CTXT, COMP->name, instr.line,
 767                                                                 instr.column);
 768             bindValues.push(bind);
 769             bind->m_mePtr = &bindValues.top();
 770             bind->setTarget(target, instr.property, CTXT);
 771
 772             bind->addToObject(target, QDeclarativePropertyPrivate::bindingIndex(instr.property));
 773         QML_END_INSTR(StoreBinding)
 774
 775         QML_BEGIN_INSTR(StoreBindingOnAlias)
 776             QObject *target =
 777                 objects.at(objects.count() - 1 - instr.owner);
 778             QObject *context =
 779                 objects.at(objects.count() - 1 - instr.context);
 780
 781             if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
 782                 QML_NEXT_INSTR(StoreBindingOnAlias);
 783
 784             QDeclarativeBinding *bind = new QDeclarativeBinding(PRIMITIVES.at(instr.value), true,
 785                                                                 context, CTXT, COMP->name, instr.line,
 786                                                                 instr.column);
 787             bindValues.push(bind);
 788             bind->m_mePtr = &bindValues.top();
 789             bind->setTarget(target, instr.property, CTXT);
 790
 791             QDeclarativeAbstractBinding *old =
 792                 QDeclarativePropertyPrivate::setBindingNoEnable(target, instr.property.coreIndex,
 793                                                                 instr.property.getValueTypeCoreIndex(),
 794                                                                 bind);
 795             if (old) { old->destroy(); }
 796         QML_END_INSTR(StoreBindingOnAlias)
 797
 798         QML_BEGIN_INSTR(StoreV4Binding)
 799             QObject *target =
 800                 objects.at(objects.count() - 1 - instr.owner);
 801             QObject *scope =
 802                 objects.at(objects.count() - 1 - instr.context);
 803
 804             int property = instr.property;
 805             if (instr.isRoot && BINDINGSKIPLIST.testBit(property & 0xFFFF))
 806                 QML_NEXT_INSTR(StoreV4Binding);
 807
 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)
 815
 816         QML_BEGIN_INSTR(StoreV8Binding)
 817             QObject *target =
 818                 objects.at(objects.count() - 1 - instr.owner);
 819             QObject *scope =
 820                 objects.at(objects.count() - 1 - instr.context);
 821
 822             if (instr.isRoot && BINDINGSKIPLIST.testBit(instr.property.coreIndex))
 823                 QML_NEXT_INSTR(StoreV8Binding);
 824
 825             QDeclarativeAbstractBinding *binding =
 826                 CTXT->v8bindings->configBinding(instr.value, target, scope,
 827                                                 instr.property, instr.line,
 828                                                 instr.column);
 829             bindValues.push(binding);
 830             binding->m_mePtr = &bindValues.top();
 831             binding->addToObject(target, QDeclarativePropertyPrivate::bindingIndex(instr.property));
 832         QML_END_INSTR(StoreV8Binding)
 833
 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);
 838
 839             obj->setParent(target);
 840             vs->setTarget(QDeclarativePropertyPrivate::restore(target, instr.property, CTXT));
 841         QML_END_INSTR(StoreValueSource)
 842
 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);
 850             vi->setTarget(prop);
 851             QDeclarativeVMEMetaObject *mo = static_cast<QDeclarativeVMEMetaObject *>((QMetaObject*)target->metaObject());
 852             mo->registerInterceptor(prop.index(), QDeclarativePropertyPrivate::valueTypeCoreIndex(prop), vi);
 853         QML_END_INSTR(StoreValueInterceptor)
 854
 855         QML_BEGIN_INSTR(StoreObjectQList)
 856             QObject *assign = objects.pop();
 857
 858             const List &list = lists.top();
 859             list.qListProperty.append((QDeclarativeListProperty<void>*)&list.qListProperty, assign);
 860         QML_END_INSTR(StoreObjectQList)
 861
 862         QML_BEGIN_INSTR(AssignObjectList)
 863             // This is only used for assigning interfaces
 864             QObject *assign = objects.pop();
 865             const List &list = lists.top();
 866
 867             int type = list.type;
 868
 869             void *ptr = 0;
 870
 871             const char *iid = QDeclarativeMetaType::interfaceIId(type);
 872             if (iid)
 873                 ptr = assign->qt_metacast(iid);
 874             if (!ptr)
 875                 VME_EXCEPTION(tr("Cannot assign object to list"), instr.line);
 876
 877
 878             list.qListProperty.append((QDeclarativeListProperty<void>*)&list.qListProperty, ptr);
 879         QML_END_INSTR(AssignObjectList)
 880
 881         QML_BEGIN_INSTR(StoreInterface)
 882             QObject *assign = objects.pop();
 883             QObject *target = objects.top();
 884             CLEAN_PROPERTY(target, instr.propertyIndex);
 885
 886             int coreIdx = instr.propertyIndex;
 887             QMetaProperty prop = target->metaObject()->property(coreIdx);
 888             int t = prop.userType();
 889             const char *iid = QDeclarativeMetaType::interfaceIId(t);
 890             bool ok = false;
 891             if (iid) {
 892                 void *ptr = assign->qt_metacast(iid);
 893                 if (ptr) {
 894                     void *a[] = { &ptr, 0, &status, &flags };
 895                     QMetaObject::metacall(target,
 896                                           QMetaObject::WriteProperty,
 897                                           coreIdx, a);
 898                     ok = true;
 899                 }
 900             }
 901
 902             if (!ok)
 903                 VME_EXCEPTION(tr("Cannot assign object to interface property"), instr.line);
 904         QML_END_INSTR(StoreInterface)
 905
 906         QML_BEGIN_INSTR(FetchAttached)
 907             QObject *target = objects.top();
 908
 909             QObject *qmlObject = qmlAttachedPropertiesObjectById(instr.id, target);
 910
 911             if (!qmlObject)
 912                 VME_EXCEPTION(tr("Unable to create attached object"), instr.line);
 913
 914             objects.push(qmlObject);
 915         QML_END_INSTR(FetchAttached)
 916
 917         QML_BEGIN_INSTR(FetchQList)
 918             QObject *target = objects.top();
 919
 920             lists.push(List(instr.type));
 921
 922             void *a[1];
 923             a[0] = (void *)&(lists.top().qListProperty);
 924             QMetaObject::metacall(target, QMetaObject::ReadProperty,
 925                                   instr.property, a);
 926         QML_END_INSTR(FetchQList)
 927
 928         QML_BEGIN_INSTR(FetchObject)
 929             QObject *target = objects.top();
 930
 931             QObject *obj = 0;
 932             // NOTE: This assumes a cast to QObject does not alter the
 933             // object pointer
 934             void *a[1];
 935             a[0] = &obj;
 936             QMetaObject::metacall(target, QMetaObject::ReadProperty,
 937                                   instr.property, a);
 938
 939             if (!obj)
 940                 VME_EXCEPTION(tr("Cannot set properties on %1 as it is null").arg(QString::fromUtf8(target->metaObject()->property(instr.property).name())), instr.line);
 941
 942             objects.push(obj);
 943         QML_END_INSTR(FetchObject)
 944
 945         QML_BEGIN_INSTR(PopQList)
 946             lists.pop();
 947         QML_END_INSTR(PopQList)
 948
 949         QML_BEGIN_INSTR(Defer)
 950             if (instr.deferCount) {
 951                 QObject *target = objects.top();
 952                 QDeclarativeData *data =
 953                     QDeclarativeData::get(target, true);
 954                 COMP->addref();
 955                 data->deferredComponent = COMP;
 956                 data->deferredIdx = INSTRUCTIONSTREAM - COMP->bytecode.constData();
 957                 INSTRUCTIONSTREAM += instr.deferCount;
 958             }
 959         QML_END_INSTR(Defer)
 960
 961         QML_BEGIN_INSTR(PopFetchedObject)
 962             objects.pop();
 963         QML_END_INSTR(PopFetchedObject)
 964
 965         QML_BEGIN_INSTR(FetchValueType)
 966             QObject *target = objects.top();
 967
 968             if (instr.bindingSkipList != 0) {
 969                 // Possibly need to clear bindings
 970                 QDeclarativeData *targetData = QDeclarativeData::get(target);
 971                 if (targetData) {
 972                     QDeclarativeAbstractBinding *binding =
 973                         QDeclarativePropertyPrivate::binding(target, instr.property, -1);
 974
 975                     if (binding && binding->bindingType() != QDeclarativeAbstractBinding::ValueTypeProxy) {
 976                         QDeclarativePropertyPrivate::setBinding(target, instr.property, -1, 0);
 977                         binding->destroy();
 978                     } else if (binding) {
 979                         QDeclarativeValueTypeProxyBinding *proxy =
 980                             static_cast<QDeclarativeValueTypeProxyBinding *>(binding);
 981                         proxy->removeBindings(instr.bindingSkipList);
 982                     }
 983                 }
 984             }
 985
 986             QDeclarativeValueType *valueHandler = ep->valueTypes[instr.type];
 987             valueHandler->read(target, instr.property);
 988             objects.push(valueHandler);
 989         QML_END_INSTR(FetchValueType)
 990
 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)
 997
 998 #ifdef QML_THREADED_VME_INTERPRETER
 999     // nothing to do
1000 #else
1001         default:
1002             qFatal("QDeclarativeCompiledData: Internal error - unknown instruction %d", genericInstr->common.instructionType);
1003             break;
1004         }
1005     }
1006 #endif
1007
1008 exceptionExit:
1009     Q_ASSERT(!states.isEmpty());
1010     Q_ASSERT(!errors->isEmpty());
1011
1012     reset();
1013
1014     return 0;
1015
1016 normalExit:
1017     Q_ASSERT(objects.count() == 1);
1018
1019     QObject *rv = objects.top();
1020
1021     objects.deallocate();
1022     lists.deallocate();
1023     states.clear();
1024
1025     return rv;
1026 }
1027
1028 void QDeclarativeVME::reset()
1029 {
1030     Q_ASSERT(!states.isEmpty() || objects.isEmpty());
1031
1032     QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
1033
1034     if (!objects.isEmpty() && !(states.at(0).flags & State::Deferred))
1035         delete objects.at(0);
1036
1037     if (!rootContext.isNull())
1038         rootContext->activeVMEData = 0;
1039
1040     // Remove the QDeclarativeParserStatus and QDeclarativeAbstractBinding back pointers
1041     blank(parserStatus);
1042     blank(bindValues);
1043
1044     while (componentAttached) {
1045         QDeclarativeComponentAttached *a = componentAttached;
1046         a->rem();
1047     }
1048
1049     engine = 0;
1050     objects.deallocate();
1051     lists.deallocate();
1052     bindValues.deallocate();
1053     parserStatus.deallocate();
1054 #ifdef QML_ENABLE_TRACE
1055     parserStatusData.deallocate();
1056 #endif
1057     finalizeCallbacks.clear();
1058     states.clear();
1059     rootContext = 0;
1060     creationContext = 0;
1061 }
1062
1063 // Must be called with a handle scope and context
1064 void QDeclarativeScriptData::initialize(QDeclarativeEngine *engine)
1065 {
1066     Q_ASSERT(m_program.IsEmpty());
1067     Q_ASSERT(engine);
1068     Q_ASSERT(!hasEngine());
1069
1070     QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
1071     QV8Engine *v8engine = ep->v8engine();
1072
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())
1076         return;
1077
1078     m_program = qPersistentNew<v8::Script>(program);
1079
1080     addToEngine(engine);
1081
1082     addref();
1083 }
1084
1085 v8::Persistent<v8::Object> QDeclarativeVME::run(QDeclarativeContextData *parentCtxt, QDeclarativeScriptData *script)
1086 {
1087     if (script->m_loaded)
1088         return qPersistentNew<v8::Object>(script->m_value);
1089
1090     Q_ASSERT(parentCtxt && parentCtxt->engine);
1091     QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(parentCtxt->engine);
1092     QV8Engine *v8engine = ep->v8engine();
1093
1094     bool shared = script->pragmas & QDeclarativeScript::Object::ScriptBlock::Shared;
1095
1096     QDeclarativeContextData *effectiveCtxt = parentCtxt;
1097     if (shared)
1098         effectiveCtxt = 0;
1099
1100     // Create the script context if required
1101     QDeclarativeContextData *ctxt = new QDeclarativeContextData;
1102     ctxt->isInternal = true;
1103     ctxt->isJSContext = true;
1104     if (shared)
1105         ctxt->isPragmaLibraryContext = true;
1106     else
1107         ctxt->isPragmaLibraryContext = parentCtxt->isPragmaLibraryContext;
1108     ctxt->url = script->url;
1109
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]);
1119     }
1120
1121     if (ctxt->imports) {
1122         ctxt->imports->addref();
1123     }
1124
1125     if (effectiveCtxt) {
1126         ctxt->setParent(effectiveCtxt, true);
1127     } else {
1128         ctxt->engine = parentCtxt->engine; // Fix for QTBUG-21620
1129     }
1130
1131     for (int ii = 0; ii < script->scripts.count(); ++ii) {
1132         ctxt->importedScripts << run(ctxt, script->scripts.at(ii)->scriptData());
1133     }
1134
1135     v8::HandleScope handle_scope;
1136     v8::Context::Scope scope(v8engine->context());
1137
1138     v8::TryCatch try_catch;
1139     if (!script->isInitialized())
1140         script->initialize(parentCtxt->engine);
1141
1142     v8::Local<v8::Object> qmlglobal = v8engine->qmlScope(ctxt, 0);
1143
1144     if (!script->m_program.IsEmpty()) {
1145         script->m_program->Run(qmlglobal);
1146     } else {
1147         // Compilation failed.
1148         Q_ASSERT(try_catch.HasCaught());
1149     }
1150
1151     v8::Persistent<v8::Object> rv;
1152
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);
1158             ep->warning(error);
1159         }
1160     }
1161
1162     rv = qPersistentNew<v8::Object>(qmlglobal);
1163     if (shared) {
1164         script->m_value = qPersistentNew<v8::Object>(qmlglobal);
1165         script->m_loaded = true;
1166     }
1167
1168     return rv;
1169 }
1170
1171 #ifdef QML_THREADED_VME_INTERPRETER
1172 void **QDeclarativeVME::instructionJumpTable()
1173 {
1174     static void **jumpTable = 0;
1175     if (!jumpTable) {
1176         QDeclarativeVME dummy;
1177         QDeclarativeVME::Interrupt i;
1178         dummy.run(0, i, &jumpTable);
1179     }
1180     return jumpTable;
1181 }
1182 #endif
1183
1184 QDeclarativeContextData *QDeclarativeVME::complete(const Interrupt &interrupt)
1185 {
1186     Q_ASSERT(engine ||
1187              (bindValues.isEmpty() &&
1188               parserStatus.isEmpty() &&
1189               componentAttached == 0 &&
1190               rootContext.isNull() &&
1191               finalizeCallbacks.isEmpty()));
1192
1193     if (!engine)
1194         return 0;
1195
1196     QDeclarativeTrace trace("VME Complete");
1197 #ifdef QML_ENABLE_TRACE
1198     trace.addDetail("URL", rootComponent->url);
1199 #endif
1200
1201     ActiveVMERestorer restore(this, QDeclarativeEnginePrivate::get(engine));
1202     QRecursionWatcher<QDeclarativeVME, &QDeclarativeVME::recursion> watcher(this);
1203
1204     {
1205     QDeclarativeTrace trace("VME Binding Enable");
1206     trace.event("begin binding eval");
1207     while (!bindValues.isEmpty()) {
1208         QDeclarativeAbstractBinding *b = bindValues.pop();
1209
1210         if(b) {
1211             b->m_mePtr = 0;
1212             b->setEnabled(true, QDeclarativePropertyPrivate::BypassInterceptor |
1213                                 QDeclarativePropertyPrivate::DontRemoveBinding);
1214         }
1215
1216         if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1217             return 0;
1218     }
1219     bindValues.deallocate();
1220     }
1221
1222     {
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();
1228 #endif
1229
1230         if (status && status->d) {
1231             status->d = 0;
1232 #ifdef QML_ENABLE_TRACE
1233             QDeclarativeTrace trace("Component complete");
1234             trace.addDetail("URL", data->outerContext->url);
1235             trace.addDetail("Line", data->lineNumber);
1236 #endif
1237             status->componentComplete();
1238         }
1239
1240         if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1241             return 0;
1242     }
1243     parserStatus.deallocate();
1244     }
1245
1246     {
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;
1251         if (obj) {
1252             void *args[] = { 0 };
1253             QMetaObject::metacall(obj, QMetaObject::InvokeMetaMethod, callback.second, args);
1254         }
1255         if (watcher.hasRecursed())
1256             return 0;
1257     }
1258     finalizeCallbacks.clear();
1259     }
1260
1261     {
1262     QDeclarativeTrace trace("VME Component.onCompleted Callbacks");
1263     while (componentAttached) {
1264         QDeclarativeComponentAttached *a = componentAttached;
1265         a->rem();
1266         QDeclarativeData *d = QDeclarativeData::get(a->parent());
1267         Q_ASSERT(d);
1268         Q_ASSERT(d->context);
1269         a->add(&d->context->componentAttached);
1270         emit a->completed();
1271
1272         if (watcher.hasRecursed() || interrupt.shouldInterrupt())
1273             return 0;
1274     }
1275     }
1276
1277     QDeclarativeContextData *rv = rootContext;
1278
1279     reset();
1280
1281     if (rv) rv->activeVMEData = data;
1282
1283     return rv;
1284 }
1285
1286 void QDeclarativeVME::blank(QFiniteStack<QDeclarativeAbstractBinding *> &bs)
1287 {
1288     for (int ii = 0; ii < bs.count(); ++ii) {
1289         QDeclarativeAbstractBinding *b = bs.at(ii);
1290         if (b) b->m_mePtr = 0;
1291     }
1292 }
1293
1294 void QDeclarativeVME::blank(QFiniteStack<QDeclarativeParserStatus *> &pss)
1295 {
1296     for (int ii = 0; ii < pss.count(); ++ii) {
1297         QDeclarativeParserStatus *ps = pss.at(ii);
1298         if(ps) ps->d = 0;
1299     }
1300 }
1301
1302 QDeclarativeVMEGuard::QDeclarativeVMEGuard()
1303 : m_objectCount(0), m_objects(0), m_contextCount(0), m_contexts(0)
1304 {
1305 }
1306
1307 QDeclarativeVMEGuard::~QDeclarativeVMEGuard()
1308 {
1309     clear();
1310 }
1311
1312 void QDeclarativeVMEGuard::guard(QDeclarativeVME *vme)
1313 {
1314     clear();
1315
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];
1320
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();
1327 }
1328
1329 void QDeclarativeVMEGuard::clear()
1330 {
1331     delete [] m_objects;
1332     delete [] m_contexts;
1333
1334     m_objectCount = 0;
1335     m_objects = 0;
1336     m_contextCount = 0;
1337     m_contexts = 0;
1338 }
1339
1340 bool QDeclarativeVMEGuard::isOK() const
1341 {
1342     for (int ii = 0; ii < m_objectCount; ++ii)
1343         if (m_objects[ii].isNull())
1344             return false;
1345
1346     for (int ii = 0; ii < m_contextCount; ++ii)
1347         if (m_contexts[ii].isNull())
1348             return false;
1349
1350     return true;
1351 }
1352
1353 QT_END_NAMESPACE