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// -*- c++ -*-
/*
* Copyright (C) 2001-2003, Richard J. Moore <rich@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef KJSEMBEDJSOBJECTPROXY_H
#define KJSEMBEDJSOBJECTPROXY_H
#include "global.h"
#include <qguardedptr.h>
#include <qcstring.h>
#include <qwidget.h>
#include <kjs/object.h>
#include <kjsembed/jsproxy.h>
#include <kjsembed/jsbinding.h>
namespace KJS { class Interpreter; }
namespace KJSEmbed {
namespace Bindings { class JSObjectProxyImp; }
class JSSecurityPolicy;
class KJSEmbedPart;
class JSObjectEventProxy;
/**
* A JS object that provides a binding to a QObject.
* <h3>Introduction</h3>
* This class defines a @ref KJS::ObjectImp that allows scripts to access
* the properties of a QObject. The scripts can also create child objects,
* load dialogs from .ui files created by Designer and navigate the object
* tree in a similar manner to the DCOP/QObject bridge.
* <h3>Example Usage</h3>
* The following example creates a @ref KJS::ObjectImp that provides
* a binding to the properties of a @ref QLineEdit . This binding is
* then used to create a property 'edit' for the object 'jsparent'.
* <pre>
*
* QLineEdit *edit = new QLineEdit();
* KJSEmbed::JSObjectProxy *proxy = new KJSEmbed::JSObjectProxy( js, edit );
* jsparent.put( js->globalExec(), "edit", proxy );
*
* </pre>
*
* <h3>Security Facilities</h3>
* In order to ensure scripts don't run amok and to ensure the script
* interpreter used by KHTML remains secure, JSObjectProxy applies a
* security policy. Every time a script tries to access an object or
* property the following tests are performed:
* <ul>
* <li>Does this request come from the correct @ref KJS::Interpreter?
* <li>Is the script allowed to access the specified QObject?
* <li>Is the script allowed to access the specified property?
* </ul>
* The @ref KJSEmbed::JSSecurityPolicy class decides if the request should
* be granted. The security policy is automatically inherited by any child
* proxies created using the object tree accessor methods.
*
* @see KJSEmbed::JSFactory
* @author Richard Moore, rich@kde.org
* $Id$
*/
class KJSEMBED_EXPORT JSObjectProxy : public JSProxy
{
public:
/**
* Create a JS binding to the target object. The binding will allow scripts to
* access any QObject that is descended the target and no others.
*/
JSObjectProxy( KJSEmbedPart *part, QObject *target );
/**
* Create a JS binding to the target object. The binding will allow scripts to
* access any QObject that is descended from the specified root. If the specified
* root is 0 then access is granted to all objects.
*/
JSObjectProxy( KJSEmbedPart *part, QObject *target, QObject *root );
/**
* Create a JS binding to the target object. The binding will allow scripts to
* access any QObject that is descended from the specified root, according to
* the specified @ref JSSecurityPolicy . If the specified root is 0 then access
* is granted to all objects.
*/
JSObjectProxy( KJSEmbedPart *part, QObject *target, QObject *root, const JSSecurityPolicy *sp );
virtual ~JSObjectProxy();
/** Returns the KJSEmbedPart in which this proxy lives. */
KJSEmbedPart *part() const { return jspart; }
/** Returns the interpreter in which this proxy lives. */
KJS::Interpreter *interpreter() const { return js; }
/** Returns the root object that defines the limit of the scope of this proxy. */
QObject *rootObject() const { return root; }
/** Returns the QObject the proxy is attached to. */
QObject *object() const { return obj; }
/** Returns the className of the proxied object */
QString typeName() const { return obj->className(); }
/** Returns the associated QWidget, or 0 if the object is not a widget. */
QWidget *widget() const
{
QObject *w = obj;
return (w && w->isWidgetType()) ? static_cast<QWidget *>(w) : 0;
}
//void *toVoidStar() { return obj; }
//template<class T>
//T *toNative(){ return dynamic_cast<QObject*>(obj); }
/** Returns true iff the content of this proxy inherits the specified base-class. */
bool inherits( const char *clazz ) { return obj->isA( clazz ); }
/** Returns the @ref JSSecurityPolicy of the proxy. */
const JSSecurityPolicy *securityPolicy() const { return policy; }
/**
* Specifies the @ref JSSecurityPolicy that should be applied to this proxy.
* Setting the policy to 0 restores the default policy.
*/
void setSecurityPolicy( const JSSecurityPolicy *sp );
/** Reimplemented to return the value of the specified property if present. */
virtual KJS::Value get( KJS::ExecState *exec, const KJS::Identifier &p ) const;
/** Reimplemented to set the value of the specified property if possible. */
virtual void put( KJS::ExecState *exec, const KJS::Identifier &p,
const KJS::Value &v, int attr = KJS::None );
/** Reimplemented to return the name and class of the target. */
virtual KJS::UString toString( KJS::ExecState *exec ) const;
/**
* Adds methods for traversing the QObject tree to the specified
* @ref KJS::Object . Only QObjects descended from the root specified
* in the constructor can be reached through JS proxies created with
* these bindings.
* <ul>
* <li>properties()
* <li>create(...)
* </ul>
*/
virtual void addBindings( KJS::ExecState *exec, KJS::Object &object );
protected:
void addBindingsClass( KJS::ExecState *exec, KJS::Object &object );
/**
* Adds bindings for the constants defined by enums of the target.
*/
void addBindingsEnum( KJS::ExecState *exec, KJS::Object &object );
/**
* Adds bindings for slots defined by the target of the proxy.
*/
void addBindingsSlots( KJS::ExecState *exec, KJS::Object &object );
private:
bool isAllowed( KJS::Interpreter *js ) const;
void addSlotBinding( const QCString &name, KJS::ExecState *exec, KJS::Object &object );
private:
KJSEmbedPart *jspart;
KJS::Interpreter *js;
QGuardedPtr<QObject> obj;
QGuardedPtr<QObject> root;
QGuardedPtr<JSObjectEventProxy> evproxy;
const JSSecurityPolicy *policy;
class JSObjectProxyPrivate *d;
friend class Bindings::JSObjectProxyImp;
};
} // namespace KJSEmbed
#endif // KJSEMBEDJSOBJECTPROXY_H
// Local Variables:
// c-basic-offset: 4
// End:
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