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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 280 insertions, 0 deletions

diff --git a/src/script/bridge/qscriptclassobject.cpp b/src/script/bridge/qscriptclassobject.cpp
new file mode 100644
index 0000000..2085756
--- /dev/null
+++ b/src/script/bridge/qscriptclassobject.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation ([email protected])
+**
+** This file is part of the QtScript module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL-ONLY$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at [email protected].
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "config.h"
+#include "qscriptclassobject_p.h"
+
+#include "../api/qscriptengine.h"
+#include "../api/qscriptengine_p.h"
+#include "../api/qscriptcontext.h"
+#include "../api/qscriptcontext_p.h"
+#include "../api/qscriptclass.h"
+#include "../api/qscriptclasspropertyiterator.h"
+
+#include "Error.h"
+#include "PropertyNameArray.h"
+
+Q_DECLARE_METATYPE(QScriptContext*)
+Q_DECLARE_METATYPE(QScriptValue)
+Q_DECLARE_METATYPE(QScriptValueList)
+
+QT_BEGIN_NAMESPACE
+
+namespace QScript
+{
+
+ClassObjectDelegate::ClassObjectDelegate(QScriptClass *scriptClass)
+    : m_scriptClass(scriptClass)
+{
+}
+
+ClassObjectDelegate::~ClassObjectDelegate()
+{
+}
+
+QScriptObjectDelegate::Type ClassObjectDelegate::type() const
+{
+    return ClassObject;
+}
+
+bool ClassObjectDelegate::getOwnPropertySlot(QScriptObject* object,
+                                             JSC::ExecState *exec,
+                                             const JSC::Identifier &propertyName,
+                                             JSC::PropertySlot &slot)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    // for compatibility with the old back-end, normal JS properties
+    // are queried first.
+    if (QScriptObjectDelegate::getOwnPropertySlot(object, exec, propertyName, slot))
+        return true;
+
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptString scriptName;
+    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
+    QScriptStringPrivate::init(scriptName, &scriptName_d);
+    uint id = 0;
+    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
+        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
+    if (flags & QScriptClass::HandlesReadAccess) {
+        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
+        if (!value.isValid()) {
+            // The class claims to have the property, but returned an invalid
+            // value. Silently convert to undefined to avoid the invalid value
+            // "escaping" into JS.
+            value = QScriptValue(QScriptValue::UndefinedValue);
+        }
+        slot.setValue(engine->scriptValueToJSCValue(value));
+        return true;
+    }
+    return false;
+}
+
+bool ClassObjectDelegate::getOwnPropertyDescriptor(QScriptObject *object,
+                                                   JSC::ExecState *exec,
+                                                   const JSC::Identifier &propertyName,
+                                                   JSC::PropertyDescriptor &descriptor)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    // for compatibility with the old back-end, normal JS properties
+    // are queried first.
+    if (QScriptObjectDelegate::getOwnPropertyDescriptor(object, exec, propertyName, descriptor))
+        return true;
+
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptString scriptName;
+    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
+    QScriptStringPrivate::init(scriptName, &scriptName_d);
+    uint id = 0;
+    QScriptClass::QueryFlags qflags = m_scriptClass->queryProperty(
+        scriptObject, scriptName, QScriptClass::HandlesReadAccess, &id);
+    if (qflags & QScriptClass::HandlesReadAccess) {
+        QScriptValue::PropertyFlags pflags = m_scriptClass->propertyFlags(scriptObject, scriptName, id);
+        unsigned attribs = 0;
+        if (pflags & QScriptValue::ReadOnly)
+            attribs |= JSC::ReadOnly;
+        if (pflags & QScriptValue::SkipInEnumeration)
+            attribs |= JSC::DontEnum;
+        if (pflags & QScriptValue::Undeletable)
+            attribs |= JSC::DontDelete;
+        if (pflags & QScriptValue::PropertyGetter)
+            attribs |= JSC::Getter;
+        if (pflags & QScriptValue::PropertySetter)
+            attribs |= JSC::Setter;
+        attribs |= pflags & QScriptValue::UserRange;
+        // Rather than calling the getter, we could return an access descriptor here.
+        QScriptValue value = m_scriptClass->property(scriptObject, scriptName, id);
+        if (!value.isValid()) {
+            // The class claims to have the property, but returned an invalid
+            // value. Silently convert to undefined to avoid the invalid value
+            // "escaping" into JS.
+            value = QScriptValue(QScriptValue::UndefinedValue);
+        }
+        descriptor.setDescriptor(engine->scriptValueToJSCValue(value), attribs);
+        return true;
+    }
+    return false;
+}
+
+void ClassObjectDelegate::put(QScriptObject* object, JSC::ExecState *exec,
+                              const JSC::Identifier &propertyName,
+                              JSC::JSValue value, JSC::PutPropertySlot &slot)
+{
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptString scriptName;
+    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
+    QScriptStringPrivate::init(scriptName, &scriptName_d);
+    uint id = 0;
+    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
+        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
+    if (flags & QScriptClass::HandlesWriteAccess) {
+        m_scriptClass->setProperty(scriptObject, scriptName, id, engine->scriptValueFromJSCValue(value));
+        return;
+    }
+    QScriptObjectDelegate::put(object, exec, propertyName, value, slot);
+}
+
+bool ClassObjectDelegate::deleteProperty(QScriptObject* object, JSC::ExecState *exec,
+                                         const JSC::Identifier &propertyName)
+{
+    // ### avoid duplication of put()
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptString scriptName;
+    QScriptStringPrivate scriptName_d(engine, propertyName, QScriptStringPrivate::StackAllocated);
+    QScriptStringPrivate::init(scriptName, &scriptName_d);
+    uint id = 0;
+    QScriptClass::QueryFlags flags = m_scriptClass->queryProperty(
+        scriptObject, scriptName, QScriptClass::HandlesWriteAccess, &id);
+    if (flags & QScriptClass::HandlesWriteAccess) {
+        if (m_scriptClass->propertyFlags(scriptObject, scriptName, id) & QScriptValue::Undeletable)
+            return false;
+        m_scriptClass->setProperty(scriptObject, scriptName, id, QScriptValue());
+        return true;
+    }
+    return QScriptObjectDelegate::deleteProperty(object, exec, propertyName);
+}
+
+void ClassObjectDelegate::getOwnPropertyNames(QScriptObject* object, JSC::ExecState *exec,
+                                              JSC::PropertyNameArray &propertyNames,
+                                              JSC::EnumerationMode mode)
+{
+    // For compatibility with the old back-end, normal JS properties
+    // are added first.
+    QScriptObjectDelegate::getOwnPropertyNames(object, exec, propertyNames, mode);
+
+    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(engine, exec);
+    QScriptValue scriptObject = engine->scriptValueFromJSCValue(object);
+    QScriptClassPropertyIterator *it = m_scriptClass->newIterator(scriptObject);
+    if (it != 0) {
+        while (it->hasNext()) {
+            it->next();
+            QString name = it->name().toString();
+            propertyNames.add(JSC::Identifier(exec, name));
+        }
+        delete it;
+    }
+}
+
+JSC::CallType ClassObjectDelegate::getCallData(QScriptObject*, JSC::CallData &callData)
+{
+    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
+        return JSC::CallTypeNone;
+    callData.native.function = call;
+    return JSC::CallTypeHost;
+}
+
+JSC::JSValue JSC_HOST_CALL ClassObjectDelegate::call(JSC::ExecState *exec, JSC::JSObject *callee,
+                                             JSC::JSValue thisValue, const JSC::ArgList &args)
+{
+    if (!callee->inherits(&QScriptObject::info))
+        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
+    QScriptObject *obj = static_cast<QScriptObject*>(callee);
+    QScriptObjectDelegate *delegate = obj->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject))
+        return JSC::throwError(exec, JSC::TypeError, "callee is not a ClassObject object");
+
+    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
+    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
+
+    JSC::ExecState *oldFrame = eng_p->currentFrame;
+    eng_p->pushContext(exec, thisValue, args, callee);
+    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
+    QScriptValue scriptObject = eng_p->scriptValueFromJSCValue(obj);
+    QVariant result = scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx));
+    eng_p->popContext();
+    eng_p->currentFrame = oldFrame;
+    return QScriptEnginePrivate::jscValueFromVariant(exec, result);
+}
+
+JSC::ConstructType ClassObjectDelegate::getConstructData(QScriptObject*, JSC::ConstructData &constructData)
+{
+    if (!m_scriptClass->supportsExtension(QScriptClass::Callable))
+        return JSC::ConstructTypeNone;
+    constructData.native.function = construct;
+    return JSC::ConstructTypeHost;
+}
+
+JSC::JSObject* ClassObjectDelegate::construct(JSC::ExecState *exec, JSC::JSObject *callee,
+                                              const JSC::ArgList &args)
+{
+    Q_ASSERT(callee->inherits(&QScriptObject::info));
+    QScriptObject *obj = static_cast<QScriptObject*>(callee);
+    QScriptObjectDelegate *delegate = obj->delegate();
+    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
+
+    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
+    JSC::ExecState *oldFrame = eng_p->currentFrame;
+    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
+    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
+
+    QScriptValue defaultObject = ctx->thisObject();
+    QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, QVariant::fromValue(ctx)));
+    if (!result.isObject())
+        result = defaultObject;
+    eng_p->popContext();
+    eng_p->currentFrame = oldFrame;
+    return JSC::asObject(eng_p->scriptValueToJSCValue(result));
+}
+
+bool ClassObjectDelegate::hasInstance(QScriptObject* object, JSC::ExecState *exec,
+                                      JSC::JSValue value, JSC::JSValue proto)
+{
+    if (!scriptClass()->supportsExtension(QScriptClass::HasInstance))
+        return QScriptObjectDelegate::hasInstance(object, exec, value, proto);
+    QScriptValueList args;
+    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
+    QScript::SaveFrameHelper saveFrame(eng_p, exec);
+    args << eng_p->scriptValueFromJSCValue(object) << eng_p->scriptValueFromJSCValue(value);
+    QVariant result = scriptClass()->extension(QScriptClass::HasInstance, QVariant::fromValue(args));
+    return result.toBool();
+}
+
+} // namespace QScript
+
+QT_END_NAMESPACE