1 files changed, 371 insertions, 0 deletions
diff --git a/src/qml/qml/qqmljavascriptexpression.cpp b/src/qml/qml/qqmljavascriptexpression.cpp
new file mode 100644
index 0000000000..aad6a04714
--- /dev/null
+++ b/src/qml/qml/qqmljavascriptexpression.cpp
@@ -0,0 +1,371 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qqmljavascriptexpression_p.h"
+
+#include <private/qqmlexpression_p.h>
+
+QT_BEGIN_NAMESPACE
+
+bool QQmlDelayedError::addError(QQmlEnginePrivate *e)
+{
+    if (!e) return false;
+
+    if (e->inProgressCreations == 0) return false; // Not in construction
+
+    if (prevError) return true; // Already in error chain
+
+    prevError = &e->erroredBindings;
+    nextError = e->erroredBindings;
+    e->erroredBindings = this;
+    if (nextError) nextError->prevError = &nextError;
+
+    return true;
+}
+
+QQmlJavaScriptExpression::QQmlJavaScriptExpression(VTable *v)
+: m_vtable(v)
+{
+}
+
+QQmlJavaScriptExpression::~QQmlJavaScriptExpression()
+{
+    clearGuards();
+    if (m_scopeObject.isT2()) // notify DeleteWatcher of our deletion.
+        m_scopeObject.asT2()->_s = 0;
+}
+
+void QQmlJavaScriptExpression::setNotifyOnValueChanged(bool v)
+{
+    activeGuards.setFlagValue(v);
+    if (!v) clearGuards();
+}
+
+void QQmlJavaScriptExpression::resetNotifyOnValueChanged()
+{
+    clearGuards();
+}
+
+v8::Local<v8::Value>
+QQmlJavaScriptExpression::evaluate(QQmlContextData *context,
+                                   v8::Handle<v8::Function> function, bool *isUndefined)
+{
+    Q_ASSERT(context && context->engine);
+
+    if (function.IsEmpty() || function->IsUndefined()) {
+        if (isUndefined) *isUndefined = true;
+        return v8::Local<v8::Value>();
+    }
+
+    QQmlEnginePrivate *ep = QQmlEnginePrivate::get(context->engine);
+
+    Q_ASSERT(notifyOnValueChanged() || activeGuards.isEmpty());
+    GuardCapture capture(context->engine, this);
+
+    QQmlEnginePrivate::PropertyCapture *lastPropertyCapture = ep->propertyCapture;
+    ep->propertyCapture = notifyOnValueChanged()?&capture:0;
+
+
+    if (notifyOnValueChanged())
+        capture.guards.copyAndClearPrepend(activeGuards);
+
+    QQmlContextData *lastSharedContext = 0;
+    QObject *lastSharedScope = 0;
+
+    bool sharedContext = useSharedContext();
+
+    // All code that follows must check with watcher before it accesses data members
+    // incase we have been deleted.
+    DeleteWatcher watcher(this);
+
+    if (sharedContext) {
+        lastSharedContext = ep->sharedContext;
+        lastSharedScope = ep->sharedScope;
+        ep->sharedContext = context;
+        ep->sharedScope = scopeObject();
+    }
+
+    v8::Local<v8::Value> result;
+    {
+        v8::TryCatch try_catch;
+        v8::Handle<v8::Object> This = ep->v8engine()->global();
+        if (scopeObject() && requiresThisObject()) {
+            v8::Handle<v8::Value> value = ep->v8engine()->newQObject(scopeObject());
+            if (value->IsObject()) This = v8::Handle<v8::Object>::Cast(value);
+        }
+
+        result = function->Call(This, 0, 0);
+
+        if (isUndefined)
+            *isUndefined = try_catch.HasCaught() || result->IsUndefined();
+
+        if (watcher.wasDeleted()) {
+        } else if (try_catch.HasCaught()) {
+            v8::Context::Scope scope(ep->v8engine()->context());
+            v8::Local<v8::Message> message = try_catch.Message();
+            if (!message.IsEmpty()) {
+                QQmlExpressionPrivate::exceptionToError(message, delayedError()->error);
+            } else {
+                if (hasDelayedError()) delayedError()->error = QQmlError();
+            }
+        } else {
+            if (hasDelayedError()) delayedError()->error = QQmlError();
+        }
+    }
+
+    if (sharedContext) {
+        ep->sharedContext = lastSharedContext;
+        ep->sharedScope = lastSharedScope;
+    }
+
+    if (capture.errorString) {
+        for (int ii = 0; ii < capture.errorString->count(); ++ii)
+            qWarning("%s", qPrintable(capture.errorString->at(ii)));
+        delete capture.errorString;
+        capture.errorString = 0;
+    }
+
+    while (Guard *g = capture.guards.takeFirst())
+        g->Delete();
+
+    ep->propertyCapture = lastPropertyCapture;
+
+    return result;
+}
+
+void QQmlJavaScriptExpression::GuardCapture::captureProperty(QQmlNotifier *n)
+{
+    if (expression) {
+
+        // Try and find a matching guard
+        while (!guards.isEmpty() && !guards.first()->isConnected(n))
+            guards.takeFirst()->Delete();
+
+        Guard *g = 0;
+        if (!guards.isEmpty()) {
+            g = guards.takeFirst();
+            g->cancelNotify();
+            Q_ASSERT(g->isConnected(n));
+        } else {
+            g = Guard::New(expression, engine);
+            g->connect(n);
+        }
+
+        expression->activeGuards.prepend(g);
+    }
+}
+
+void QQmlJavaScriptExpression::GuardCapture::captureProperty(QObject *o, int c, int n)
+{
+    if (expression) {
+        if (n == -1) {
+            if (!errorString) {
+                errorString = new QStringList;
+                QString preamble = QLatin1String("QQmlExpression: Expression ") +
+                                   expression->m_vtable->expressionIdentifier(expression) +
+                                   QLatin1String(" depends on non-NOTIFYable properties:");
+                errorString->append(preamble);
+            }
+
+            const QMetaObject *metaObj = o->metaObject();
+            QMetaProperty metaProp = metaObj->property(c);
+
+            QString error = QLatin1String("    ") +
+                            QString::fromUtf8(metaObj->className()) +
+                            QLatin1String("::") +
+                            QString::fromUtf8(metaProp.name());
+            errorString->append(error);
+        } else {
+
+            // Try and find a matching guard
+            while (!guards.isEmpty() && !guards.first()->isConnected(o, n))
+                guards.takeFirst()->Delete();
+
+            Guard *g = 0;
+            if (!guards.isEmpty()) {
+                g = guards.takeFirst();
+                g->cancelNotify();
+                Q_ASSERT(g->isConnected(o, n));
+            } else {
+                g = Guard::New(expression, engine);
+                g->connect(o, n);
+            }
+
+            expression->activeGuards.prepend(g);
+        }
+    }
+}
+
+void QQmlJavaScriptExpression::clearError()
+{
+    if (m_vtable.hasValue()) {
+        m_vtable.value().error = QQmlError();
+        m_vtable.value().removeError();
+    }
+}
+
+QQmlError QQmlJavaScriptExpression::error() const
+{
+    if (m_vtable.hasValue()) return m_vtable.constValue()->error;
+    else return QQmlError();
+}
+
+QQmlDelayedError *QQmlJavaScriptExpression::delayedError()
+{
+    return &m_vtable.value();
+}
+
+void QQmlJavaScriptExpression::exceptionToError(v8::Handle<v8::Message> message, QQmlError &error)
+{
+    Q_ASSERT(!message.IsEmpty());
+
+    v8::Handle<v8::Value> name = message->GetScriptResourceName();
+    v8::Handle<v8::String> description = message->Get();
+    int lineNumber = message->GetLineNumber();
+
+    v8::Local<v8::String> file = name->IsString()?name->ToString():v8::Local<v8::String>();
+    if (file.IsEmpty() || file->Length() == 0)
+        error.setUrl(QUrl(QLatin1String("<Unknown File>")));
+    else
+        error.setUrl(QUrl(QV8Engine::toStringStatic(file)));
+
+    error.setLine(lineNumber);
+    error.setColumn(-1);
+
+    QString qDescription = QV8Engine::toStringStatic(description);
+    if (qDescription.startsWith(QLatin1String("Uncaught ")))
+        qDescription = qDescription.mid(9 /* strlen("Uncaught ") */);
+
+    error.setDescription(qDescription);
+}
+
+// Callee owns the persistent handle
+v8::Persistent<v8::Function>
+QQmlJavaScriptExpression::evalFunction(QQmlContextData *ctxt, QObject *scope,
+                                       const char *code, int codeLength,
+                                       const QString &filename, int line,
+                                       v8::Persistent<v8::Object> *qmlscope)
+{
+    QQmlEngine *engine = ctxt->engine;
+    QQmlEnginePrivate *ep = QQmlEnginePrivate::get(engine);
+
+    v8::HandleScope handle_scope;
+    v8::Context::Scope ctxtscope(ep->v8engine()->context());
+
+    v8::TryCatch tc;
+    v8::Local<v8::Object> scopeobject = ep->v8engine()->qmlScope(ctxt, scope);
+    v8::Local<v8::Script> script = ep->v8engine()->qmlModeCompile(code, codeLength, filename, line);
+    if (tc.HasCaught()) {
+        QQmlError error;
+        error.setDescription(QLatin1String("Exception occurred during function compilation"));
+        error.setLine(line);
+        error.setUrl(QUrl::fromLocalFile(filename));
+        v8::Local<v8::Message> message = tc.Message();
+        if (!message.IsEmpty())
+            QQmlExpressionPrivate::exceptionToError(message, error);
+        ep->warning(error);
+        return v8::Persistent<v8::Function>();
+    }
+    v8::Local<v8::Value> result = script->Run(scopeobject);
+    if (tc.HasCaught()) {
+        QQmlError error;
+        error.setDescription(QLatin1String("Exception occurred during function evaluation"));
+        error.setLine(line);
+        error.setUrl(QUrl::fromLocalFile(filename));
+        v8::Local<v8::Message> message = tc.Message();
+        if (!message.IsEmpty())
+            QQmlExpressionPrivate::exceptionToError(message, error);
+        ep->warning(error);
+        return v8::Persistent<v8::Function>();
+    }
+    if (qmlscope) *qmlscope = qPersistentNew<v8::Object>(scopeobject);
+    return qPersistentNew<v8::Function>(v8::Local<v8::Function>::Cast(result));
+}
+
+// Callee owns the persistent handle
+v8::Persistent<v8::Function>
+QQmlJavaScriptExpression::evalFunction(QQmlContextData *ctxt, QObject *scope,
+                                       const QString &code, const QString &filename, int line,
+                                       v8::Persistent<v8::Object> *qmlscope)
+{
+    QQmlEngine *engine = ctxt->engine;
+    QQmlEnginePrivate *ep = QQmlEnginePrivate::get(engine);
+
+    v8::HandleScope handle_scope;
+    v8::Context::Scope ctxtscope(ep->v8engine()->context());
+
+    v8::TryCatch tc;
+    v8::Local<v8::Object> scopeobject = ep->v8engine()->qmlScope(ctxt, scope);
+    v8::Local<v8::Script> script = ep->v8engine()->qmlModeCompile(code, filename, line);
+    if (tc.HasCaught()) {
+        QQmlError error;
+        error.setDescription(QLatin1String("Exception occurred during function compilation"));
+        error.setLine(line);
+        error.setUrl(QUrl::fromLocalFile(filename));
+        v8::Local<v8::Message> message = tc.Message();
+        if (!message.IsEmpty())
+            QQmlExpressionPrivate::exceptionToError(message, error);
+        ep->warning(error);
+        return v8::Persistent<v8::Function>();
+    }
+    v8::Local<v8::Value> result = script->Run(scopeobject);
+    if (tc.HasCaught()) {
+        QQmlError error;
+        error.setDescription(QLatin1String("Exception occurred during function evaluation"));
+        error.setLine(line);
+        error.setUrl(QUrl::fromLocalFile(filename));
+        v8::Local<v8::Message> message = tc.Message();
+        if (!message.IsEmpty())
+            QQmlExpressionPrivate::exceptionToError(message, error);
+        ep->warning(error);
+        return v8::Persistent<v8::Function>();
+    }
+    if (qmlscope) *qmlscope = qPersistentNew<v8::Object>(scopeobject);
+    return qPersistentNew<v8::Function>(v8::Local<v8::Function>::Cast(result));
+}
+
+void QQmlJavaScriptExpression::clearGuards()
+{
+    while (Guard *g = activeGuards.takeFirst())
+        g->Delete();
+}
+
+QT_END_NAMESPACE