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authoraavit <qt-info@nokia.com>2010-10-06 12:57:48 +0200
committeraavit <qt-info@nokia.com>2010-10-06 12:57:48 +0200
commit5019ece540d1f9dc08157f67b55d1c4ed896ae39 (patch)
tree2983f19a546336def390f7a43fa4f8426eea8bc8 /qtscriptclassic/src/qscriptvalueimpl.cpp
Long live the Qt Solutions archive!
This commit adds the contents of distribution packages of the relevant subset of the Qt Solutions components, generated from the last versions in Perforce.
Diffstat (limited to 'qtscriptclassic/src/qscriptvalueimpl.cpp')
-rw-r--r--qtscriptclassic/src/qscriptvalueimpl.cpp447
1 files changed, 447 insertions, 0 deletions
diff --git a/qtscriptclassic/src/qscriptvalueimpl.cpp b/qtscriptclassic/src/qscriptvalueimpl.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of a Qt Solutions component.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+** the names of its contributors may be used to endorse or promote
+** products derived from this software without specific prior written
+** permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+
+
+#include "qscriptvalueimpl_p.h"
+
+
+#include "qscriptengine_p.h"
+#include "qscriptvalueimpl_p.h"
+#include "qscriptcontext_p.h"
+#include "qscriptmember_p.h"
+#include "qscriptobject_p.h"
+
+QT_BEGIN_NAMESPACE
+
+static void dfs(QScriptObject *instance, QHash<QScriptObject*, int> &dfn, int n)
+{
+ bool found = dfn.contains(instance);
+ dfn[instance] = n;
+
+ if (found)
+ return;
+
+ if (instance->m_prototype.isObject())
+ dfs (instance->m_prototype.m_object_value, dfn, n + 1);
+
+ if (instance->m_scope.isObject())
+ dfs (instance->m_scope.m_object_value, dfn, n + 1);
+}
+
+
+static bool checkCycle(QScriptObject *instance, const QHash<QScriptObject*, int> &dfn)
+{
+ int n = dfn.value(instance);
+
+ if (instance->m_prototype.isObject()) {
+ if (n >= dfn.value(instance->m_prototype.m_object_value))
+ return true;
+ }
+
+ if (instance->m_scope.isObject()) {
+ if (n >= dfn.value(instance->m_scope.m_object_value))
+ return true;
+ }
+
+ return false;
+}
+
+bool QScriptValueImpl::detectedCycle() const
+{
+ QHash<QScriptObject*, int> dfn;
+ dfs(m_object_value, dfn, 0);
+ return checkCycle(m_object_value, dfn);
+}
+
+bool QScriptValueImpl::instanceOf(const QScriptValueImpl &value) const
+{
+ if (! isObject() || ! value.isObject() || !value.implementsHasInstance())
+ return false;
+ return value.hasInstance(*this);
+}
+
+bool QScriptValueImpl::implementsHasInstance() const
+{
+ Q_ASSERT(isObject());
+ if (isFunction())
+ return true;
+ if (QScriptClassData *odata = classInfo()->data()) {
+ return odata->implementsHasInstance(*this);
+ }
+ return false;
+}
+
+bool QScriptValueImpl::hasInstance(const QScriptValueImpl &value) const
+{
+ Q_ASSERT(isObject());
+
+ if (QScriptClassData *odata = classInfo()->data()) {
+ if (odata->implementsHasInstance(*this))
+ return odata->hasInstance(*this, value);
+ }
+ if (!isFunction())
+ return false;
+
+ // [[HasInstance] for function objects
+
+ if (!value.isObject())
+ return false;
+
+ QScriptEnginePrivate *eng = engine();
+ QScriptValueImpl proto = property(eng->idTable()->id_prototype);
+ if (!proto.isObject()) {
+ QScriptContextPrivate *ctx = eng->currentContext();
+ ctx->throwTypeError(QLatin1String("instanceof: 'prototype' property is not an object"));
+ return false;
+ }
+
+ QScriptObject *target = proto.m_object_value;
+ QScriptValueImpl v = value;
+ while (true) {
+ v = v.prototype();
+ if (!v.isObject())
+ break;
+ if (target == v.m_object_value)
+ return true;
+ }
+ return false;
+}
+
+bool QScriptValueImpl::resolve_helper(QScriptNameIdImpl *nameId, QScript::Member *member,
+ QScriptValueImpl *object, QScriptValue::ResolveFlags mode,
+ QScript::AccessMode access) const
+{
+ QScriptObject *object_data = m_object_value;
+
+ QScriptEnginePrivate *eng_p = engine();
+
+ if (nameId == eng_p->idTable()->id___proto__) {
+ member->native(nameId, /*id=*/0, QScriptValue::Undeletable);
+ *object = *this;
+ return true;
+ }
+
+ // If not found anywhere else, search in the extra members.
+ if (QScriptClassData *odata = classInfo()->data()) {
+ *object = *this;
+
+ if (odata->resolve(*this, nameId, member, object, access))
+ return true;
+ }
+
+ if (mode & QScriptValue::ResolvePrototype) {
+ // For values and other non object based types, search in class's prototype
+ const QScriptValueImpl &proto = object_data->m_prototype;
+
+ if (proto.isObject()
+ && proto.resolve(nameId, member, object, mode, access)) {
+ return true;
+ }
+ }
+
+ if ((mode & QScriptValue::ResolveScope) && object_data->m_scope.isValid())
+ return object_data->m_scope.resolve(nameId, member, object, mode, access);
+
+ return false;
+}
+
+void QScriptValueImpl::setProperty(QScriptNameIdImpl *nameId,
+ const QScriptValueImpl &value,
+ const QScriptValue::PropertyFlags &flags)
+{
+ if (!isObject())
+ return;
+
+ QScriptValueImpl base;
+ QScript::Member member;
+
+ QScriptValue::ResolveFlags mode = QScriptValue::ResolveLocal;
+ // if we are not setting a setter or getter, look in prototype too
+ if (!(flags & (QScriptValue::PropertyGetter | QScriptValue::PropertySetter)))
+ mode |= QScriptValue::ResolvePrototype;
+
+ if (resolve(nameId, &member, &base, mode, QScript::ReadWrite)) {
+ // we resolved an existing property with that name
+ if (flags & (QScriptValue::PropertyGetter | QScriptValue::PropertySetter)) {
+ // setting the getter or setter of a property in this object
+ if (member.isNativeProperty()) {
+ if (value.isValid()) {
+ qWarning("QScriptValue::setProperty() failed: "
+ "cannot set getter or setter of native property `%s'",
+ qPrintable(nameId->s));
+ }
+ return;
+ }
+ if (member.isSetter()) {
+ // the property we resolved is a setter
+ if (!(flags & QScriptValue::PropertySetter) && !member.isGetter()) {
+ // find the getter, if not, create one
+ if (!m_object_value->findGetter(&member)) {
+ if (!value.isValid())
+ return; // don't create property for invalid value
+ createMember(nameId, &member, flags);
+ }
+ }
+ } else if (member.isGetter()) {
+ // the property we resolved is a getter
+ if (!(flags & QScriptValue::PropertyGetter)) {
+ // find the setter, if not, create one
+ if (!m_object_value->findSetter(&member)) {
+ if (!value.isValid())
+ return; // don't create property for invalid value
+ createMember(nameId, &member, flags);
+ }
+ }
+ } else {
+ // the property is a normal property -- change the flags
+ uint newFlags = flags & ~QScript::Member::InternalRange;
+ newFlags |= QScript::Member::ObjectProperty;
+ member.resetFlags(newFlags);
+ base.m_object_value->m_members[member.id()].resetFlags(newFlags);
+ }
+ Q_ASSERT(member.isValid());
+ if (!value.isValid()) {
+ // remove the property
+ removeMember(member);
+ return;
+ }
+ } else {
+ // setting the value
+ if (member.isGetterOrSetter()) {
+ // call the setter
+ QScriptValueImpl setter;
+ if (member.isObjectProperty() && !member.isSetter()) {
+ if (!base.m_object_value->findSetter(&member)) {
+ qWarning("QScriptValue::setProperty() failed: "
+ "property '%s' has a getter but no setter",
+ qPrintable(nameId->s));
+ return;
+ }
+ }
+ base.get(member, &setter);
+ setter.call(*this, QScriptValueImplList() << value);
+ return;
+ } else {
+ if (base.m_object_value != m_object_value) {
+ if (!value.isValid())
+ return; // don't create property for invalid value
+ createMember(nameId, &member, flags);
+ base = *this;
+ } else {
+ if (!value.isValid()) {
+ // remove the property
+ removeMember(member);
+ return;
+ }
+ }
+ if (flags != QScriptValue::KeepExistingFlags) {
+ // change flags
+ if (member.isNativeProperty()) {
+ qWarning("QScriptValue::setProperty(%s): "
+ "cannot change flags of a native property",
+ qPrintable(nameId->s));
+ } else {
+ uint newFlags = member.flags() & QScript::Member::InternalRange;
+ newFlags |= flags & ~QScript::Member::InternalRange;
+ base.m_object_value->m_members[member.id()].resetFlags(newFlags);
+ }
+ }
+ }
+ }
+ } else {
+ // property does not exist
+ if (!value.isValid())
+ return; // don't create property for invalid value
+ createMember(nameId, &member, flags & ~QScript::Member::InternalRange);
+ base = *this;
+ }
+
+ base.put(member, value);
+}
+
+QVariant QScriptValueImpl::toVariant() const
+{
+ switch (m_type) {
+ case QScript::InvalidType:
+ return QVariant();
+
+ case QScript::UndefinedType:
+ case QScript::NullType:
+ case QScript::PointerType:
+ case QScript::ReferenceType:
+ break;
+
+ case QScript::BooleanType:
+ return QVariant(m_bool_value);
+
+ case QScript::IntegerType:
+ return QVariant(m_int_value);
+
+ case QScript::NumberType:
+ return QVariant(m_number_value);
+
+ case QScript::StringType:
+ return QVariant(m_string_value->s);
+
+ case QScript::LazyStringType:
+ return QVariant(*m_lazy_string_value);
+
+ case QScript::ObjectType:
+ if (isDate())
+ return QVariant(toDateTime());
+
+#ifndef QT_NO_REGEXP
+ if (isRegExp())
+ return QVariant(toRegExp());
+#endif
+ if (isVariant())
+ return variantValue();
+
+#ifndef QT_NO_QOBJECT
+ if (isQObject())
+ return qVariantFromValue(toQObject());
+#endif
+ if (isArray())
+ return QScriptEnginePrivate::variantListFromArray(*this);
+
+ QScriptValueImpl v = engine()->toPrimitive(*this);
+ if (!v.isObject())
+ return v.toVariant();
+ break;
+ } // switch
+ return QVariant();
+}
+
+QDebug &operator<<(QDebug &d, const QScriptValueImpl &object)
+{
+ d.nospace() << "QScriptValue(";
+
+ switch (object.type()) {
+ case QScript::InvalidType:
+ d.nospace() << "Invalid)";
+ return d;
+
+ case QScript::BooleanType:
+ d.nospace() << "bool=" << object.toBoolean();
+ break;
+
+ case QScript::IntegerType:
+ d.nospace() << "int=" << object.toInt32();
+ break;
+
+ case QScript::NumberType:
+ d.nospace() << "qsreal=" << object.toNumber();
+ break;
+
+ case QScript::LazyStringType:
+ case QScript::StringType:
+ d.nospace() << "string=" << object.toString();
+ break;
+
+ case QScript::ReferenceType:
+ d.nospace() << "reference";
+ break;
+
+ case QScript::NullType:
+ d.nospace() << "null";
+ break;
+
+ case QScript::UndefinedType:
+ d.nospace() << "undefined";
+ break;
+
+ case QScript::PointerType:
+ d.nospace() << "pointer";
+ break;
+
+ case QScript::ObjectType:
+ d.nospace() << object.classInfo()->name() << ",{";
+ QScriptObject *od = object.objectValue();
+ for (int i=0; i<od->memberCount(); ++i) {
+ if (i != 0)
+ d << ',';
+
+ QScript::Member m;
+ od->member(i, &m);
+
+ if (m.isValid() && m.isObjectProperty()) {
+ d << object.engine()->toString(m.nameId());
+ QScriptValueImpl o;
+ od->get(m, &o);
+ d.nospace() << QLatin1Char(':')
+ << (o.classInfo()
+ ? o.classInfo()->name()
+ : QLatin1String("?"));
+ }
+ }
+
+ d.nospace() << "} scope={";
+ QScriptValueImpl scope = object.scope();
+ while (scope.isValid()) {
+ Q_ASSERT(scope.isObject());
+ d.nospace() << ' ' << scope.objectValue();
+ scope = scope.scope();
+ }
+ d.nospace() << '}';
+ break;
+ }
+
+ d << ')';
+ return d;
+}
+
+void QScriptValueImpl::destroyObjectData()
+{
+ Q_ASSERT(isObject());
+ m_object_value->finalizeData();
+}
+
+bool QScriptValueImpl::isMarked(int generation) const
+{
+ if (isString())
+ return (m_string_value->used != 0);
+ else if (isObject()) {
+ QScript::GCBlock *block = QScript::GCBlock::get(m_object_value);
+ return (block->generation == generation);
+ }
+ return false;
+}
+
+QT_END_NAMESPACE
+