File indexing completed on 2024-09-29 12:09:25

 /* This file is part of the KDE libraries
     Copyright (C) 2003,2004,2005,2006 Ian Reinhart Geiser <geiseri@kde.org>
     Copyright (C) 2003,2004,2005,2006 Matt Broadstone <mbroadst@gmail.com>
     Copyright (C) 2003,2004,2005,2006 Richard J. Moore <rich@kde.org>
     Copyright (C) 2003,2004,2005,2006 Erik L. Bunce <kde@bunce.us>
 
     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.
 */
 #include "eventproxy.h"
 
 #include  <QCoreApplication>
 
 #include "qobject_binding.h"
 #include <kjs/interpreter.h>
 
 #include "kjseglobal.h"
 #include "jseventmapper.h"
 #include "jseventutils.h"
 
 using namespace KJSEmbed;
 
 EventProxy::EventProxy(QObjectBinding *watch, KJS::Interpreter *interpreter) :
     QObject(watch->object<QObject>()), m_watch(watch), m_interpreter(interpreter)
 {
     m_refcount = 0l;
 }
 
 EventProxy::~EventProxy()
 {
 }
 
 bool EventProxy::isFiltered(QEvent::Type t) const
 {
     if (m_eventMask.size() <= t) {
         return false;
     }
     return m_eventMask.testBit(t);
 }
 
 void EventProxy::addFilter(QEvent::Type t)
 {
     if (t == QEvent::None) {
         return;
     }
     if (!m_refcount) {
         m_watch->object<QObject>()->installEventFilter(this);
     }
 
     if (m_eventMask.size() <= t) {
         m_eventMask.resize(t + 1);
     }
 
     if (!m_eventMask.testBit(t)) {
         m_refcount++;
         m_eventMask.setBit(t);
     }
 }
 
 void EventProxy::removeFilter(QEvent::Type t)
 {
     if (t == QEvent::None) {
         return;
     }
     if (m_eventMask.size() <= t) {
         return;
     }
     m_eventMask.clearBit(t);
     m_refcount--;
     if (!m_refcount) {
         m_watch->object<QObject>()->removeEventFilter(this);
         deleteLater();
     }
 }
 
 bool EventProxy::eventFilter(QObject * /*watched*/, QEvent *e)
 {
     if (isFiltered(e->type())) {
         return !callHandler(e);
     }
     return false;
 }
 
 bool EventProxy::callHandler(QEvent *e)
 {
 // Be careful enabling this as if there are a lot of events then the event loop times
 // out and the app crashes with 'Alarm Clock'.
 //    qDebug("JSObjectEventProxy::callHandler() event type %d" , e->type() );
 
     KJS::ExecState *exec = m_interpreter->globalExec();
     KJS::Identifier id = JSEventMapper::mapper()->findEventHandler(e->type());
 
     KJS::JSObject *jsobj(m_watch);
     KJS::JSObject *fun = jsobj->get(exec, id)->toObject(exec);
 
     KJS::JSValue *retValue;
     if (!fun->implementsCall()) {
         QString msg = i18n("Bad event handler: Object %1 Identifier %2 Method %3 Type: %4.",
                            jsobj->className().ascii(),
                            id.ascii(),
                            fun->className().ascii(),
                            e->type());
         retValue = throwError(exec, KJS::TypeError, msg);
     } else {
         // Process args
         KJS::List args;
         args.append(JSEventUtils::event(exec, e));
 
         // Call handler
         retValue = fun->call(exec, jsobj, args);
     }
 
     if (exec->hadException()) {
         if (m_interpreter->shouldPrintExceptions()) {
             KJS::JSLock lock;
             KJS::JSObject *exceptObj = retValue->toObject(exec);
             QString message = toQString(exceptObj->toString(exec));
             QString sourceURL = toQString(exceptObj->get(exec, "sourceURL")->toString(exec));
             int sourceId = exceptObj->get(exec, "sourceId")->toUInt32(exec);
             int line = exceptObj->get(exec, "line")->toUInt32(exec);
             (*KJSEmbed::conerr()) << i18n("Exception calling '%1' function from %2:%3:%4", id.ascii(), !sourceURL.isEmpty() ? sourceURL : QString::number(sourceId), line, message) << Qt::endl;
         }
 
         // clear it so it doesn't stop other things
         exec->clearException();
         return false;
     }
 
     return true;
 }