/***************************************************************************
- * Copyright (C) 2005-2010 by the Quassel Project *
+ * Copyright (C) 2005-2012 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
#include <QDebug>
#include "event.h"
-
-EventManager::EventManager(QObject *parent) : QObject(parent) {
-
-}
-
-EventManager::~EventManager() {
- // pending events won't be delivered anymore, but we do need to delete them
- qDeleteAll(_eventQueue);
+#include "ircevent.h"
+
+// ============================================================
+// QueuedEvent
+// ============================================================
+class QueuedQuasselEvent : public QEvent {
+public:
+ QueuedQuasselEvent(Event *event)
+ : QEvent(QEvent::User), event(event) {}
+ Event *event;
+};
+
+// ============================================================
+// EventManager
+// ============================================================
+EventManager::EventManager(QObject *parent)
+ : QObject(parent) {
}
-QMetaEnum EventManager::eventEnum() const {
+QMetaEnum EventManager::eventEnum() {
if(!_enum.isValid()) {
- int eventEnumIndex = metaObject()->indexOfEnumerator("EventType");
+ int eventEnumIndex = staticMetaObject.indexOfEnumerator("EventType");
Q_ASSERT(eventEnumIndex >= 0);
- _enum = metaObject()->enumerator(eventEnumIndex);
+ _enum = staticMetaObject.enumerator(eventEnumIndex);
Q_ASSERT(_enum.isValid());
}
return _enum;
}
-EventManager::EventType EventManager::eventTypeByName(const QString &name) const {
+EventManager::EventType EventManager::eventTypeByName(const QString &name) {
int val = eventEnum().keyToValue(name.toLatin1());
return (val == -1) ? Invalid : static_cast<EventType>(val);
}
-EventManager::EventType EventManager::eventGroupByName(const QString &name) const {
+EventManager::EventType EventManager::eventGroupByName(const QString &name) {
EventType type = eventTypeByName(name);
return type == Invalid? Invalid : static_cast<EventType>(type & EventGroupMask);
}
-QString EventManager::enumName(EventType type) const {
+QString EventManager::enumName(EventType type) {
+ return eventEnum().valueToKey(type);
+}
+
+QString EventManager::enumName(int type) {
return eventEnum().valueToKey(type);
}
with the actual class. Possibly (optionally) using rtti...
*/
-void EventManager::registerObject(QObject *object, Priority priority, const QString &methodPrefix) {
- for(int i = object->metaObject()->methodOffset(); i < object->metaObject()->methodCount(); i++) {
- QString methodSignature(object->metaObject()->method(i).signature());
+int EventManager::findEventType(const QString &methodSignature_, const QString &methodPrefix) const {
+ if(!methodSignature_.startsWith(methodPrefix))
+ return -1;
- if(!methodSignature.startsWith(methodPrefix))
- continue;
+ QString methodSignature = methodSignature_;
- methodSignature = methodSignature.section('(',0,0); // chop the attribute list
- methodSignature = methodSignature.mid(methodPrefix.length()); // strip prefix
+ methodSignature = methodSignature.section('(',0,0); // chop the attribute list
+ methodSignature = methodSignature.mid(methodPrefix.length()); // strip prefix
- int eventType = eventEnum().keyToValue(methodSignature.toAscii());
- if(eventType < 0) {
- qWarning() << Q_FUNC_INFO << QString("Could not find EventType %1").arg(methodSignature);
- continue;
+ int eventType = -1;
+
+ // special handling for numeric IrcEvents: IrcEvent042 gets mapped to IrcEventNumeric + 42
+ if(methodSignature.length() == 8+3 && methodSignature.startsWith("IrcEvent")) {
+ int num = methodSignature.right(3).toUInt();
+ if(num > 0) {
+ QString numericSig = methodSignature.left(methodSignature.length() - 3) + "Numeric";
+ eventType = eventEnum().keyToValue(numericSig.toAscii());
+ if(eventType < 0) {
+ qWarning() << Q_FUNC_INFO << "Could not find EventType" << numericSig << "for handling" << methodSignature;
+ return -1;
+ }
+ eventType += num;
}
- Handler handler(object, i, priority);
- registeredHandlers()[static_cast<EventType>(eventType)].append(handler);
- qDebug() << "Registered event handler for" << methodSignature << "in" << object;
}
+
+ if(eventType < 0)
+ eventType = eventEnum().keyToValue(methodSignature.toAscii());
+ if(eventType < 0) {
+ qWarning() << Q_FUNC_INFO << "Could not find EventType" << methodSignature;
+ return -1;
+ }
+ return eventType;
+}
+
+void EventManager::registerObject(QObject *object, Priority priority, const QString &methodPrefix, const QString &filterPrefix) {
+ for(int i = object->metaObject()->methodOffset(); i < object->metaObject()->methodCount(); i++) {
+ QString methodSignature(object->metaObject()->method(i).signature());
+
+ int eventType = findEventType(methodSignature, methodPrefix);
+ if(eventType > 0) {
+ Handler handler(object, i, priority);
+ registeredHandlers()[eventType].append(handler);
+ //qDebug() << "Registered event handler for" << methodSignature << "in" << object;
+ }
+ eventType = findEventType(methodSignature, filterPrefix);
+ if(eventType > 0) {
+ Handler handler(object, i, priority);
+ registeredFilters()[eventType].append(handler);
+ //qDebug() << "Registered event filterer for" << methodSignature << "in" << object;
+ }
+ }
+}
+
+void EventManager::registerEventFilter(EventType event, QObject *object, const char *slot) {
+ registerEventHandler(QList<EventType>() << event, object, slot, NormalPriority, true);
}
-void EventManager::registerEventHandler(EventType event, QObject *object, const char *slot, Priority priority) {
- registerEventHandler(QList<EventType>() << event, object, slot, priority);
+void EventManager::registerEventFilter(QList<EventType> events, QObject *object, const char *slot) {
+ registerEventHandler(events, object, slot, NormalPriority, true);
}
-void EventManager::registerEventHandler(QList<EventType> events, QObject *object, const char *slot, Priority priority) {
+void EventManager::registerEventHandler(EventType event, QObject *object, const char *slot, Priority priority, bool isFilter) {
+ registerEventHandler(QList<EventType>() << event, object, slot, priority, isFilter);
+}
+
+void EventManager::registerEventHandler(QList<EventType> events, QObject *object, const char *slot, Priority priority, bool isFilter) {
int methodIndex = object->metaObject()->indexOfMethod(slot);
if(methodIndex < 0) {
qWarning() << Q_FUNC_INFO << QString("Slot %1 not found in object %2").arg(slot).arg(object->objectName());
}
Handler handler(object, methodIndex, priority);
foreach(EventType event, events) {
- registeredHandlers()[event].append(handler);
- qDebug() << "Registered event handler for" << event << "in" << object;
+ if(isFilter) {
+ registeredFilters()[event].append(handler);
+ qDebug() << "Registered event filter for" << event << "in" << object;
+ } else {
+ registeredHandlers()[event].append(handler);
+ qDebug() << "Registered event handler for" << event << "in" << object;
+ }
}
}
-// not threadsafe! if we should want that, we need to add a mutexed queue somewhere in this general area.
-void EventManager::sendEvent(Event *event) {
- // qDebug() << "Sending" << event;
- _eventQueue.append(event);
- if(_eventQueue.count() == 1) // we're not currently processing another event
- processEvents();
+void EventManager::postEvent(Event *event) {
+ if(sender() && sender()->thread() != this->thread()) {
+ QueuedQuasselEvent *queuedEvent = new QueuedQuasselEvent(event);
+ QCoreApplication::postEvent(this, queuedEvent);
+ } else {
+ if(_eventQueue.isEmpty())
+ // we're currently not processing events
+ processEvent(event);
+ else
+ _eventQueue.append(event);
+ }
}
void EventManager::customEvent(QEvent *event) {
if(event->type() == QEvent::User) {
- processEvents();
+ QueuedQuasselEvent *queuedEvent = static_cast<QueuedQuasselEvent *>(event);
+ processEvent(queuedEvent->event);
event->accept();
}
}
-void EventManager::processEvents() {
- // we only process one event at a time for now, and let Qt's own event processing come in between
- if(_eventQueue.isEmpty())
- return;
- dispatchEvent(_eventQueue.first());
- _eventQueue.removeFirst();
- if(_eventQueue.count())
- QCoreApplication::postEvent(this, new QEvent(QEvent::User));
+void EventManager::processEvent(Event *event) {
+ Q_ASSERT(_eventQueue.isEmpty());
+ dispatchEvent(event);
+ // dispatching the event might cause new events to be generated. we process those afterwards.
+ while(!_eventQueue.isEmpty()) {
+ dispatchEvent(_eventQueue.first());
+ _eventQueue.removeFirst();
+ }
}
void EventManager::dispatchEvent(Event *event) {
// build a list sorted by priorities that contains all eligible handlers
QList<Handler> handlers;
- EventType type = event->type();
- insertHandlers(registeredHandlers().value(type), handlers);
+ QHash<QObject *, Handler> filters;
+ QSet<QObject *> ignored;
+ uint type = event->type();
+
+ bool checkDupes = false;
+
+ // special handling for numeric IrcEvents
+ if((type & ~IrcEventNumericMask) == IrcEventNumeric) {
+ ::IrcEventNumeric *numEvent = static_cast< ::IrcEventNumeric *>(event);
+ if(!numEvent)
+ qWarning() << "Invalid event type for IrcEventNumeric!";
+ else {
+ int num = numEvent->number();
+ if(num > 0) {
+ insertHandlers(registeredHandlers().value(type + num), handlers, false);
+ insertFilters(registeredFilters().value(type + num), filters);
+ checkDupes = true;
+ }
+ }
+ }
+
+ // exact type
+ insertHandlers(registeredHandlers().value(type), handlers, checkDupes);
+ insertFilters(registeredFilters().value(type), filters);
// check if we have a generic handler for the event group
- if((type & EventGroupMask) != type)
- insertHandlers(registeredHandlers().value(type & EventGroupMask), handlers);
+ if((type & EventGroupMask) != type) {
+ insertHandlers(registeredHandlers().value(type & EventGroupMask), handlers, true);
+ insertFilters(registeredFilters().value(type & EventGroupMask), filters);
+ }
// now dispatch the event
- QList<Handler>::const_iterator it = handlers.begin();
- while(it != handlers.end()) {
+ QList<Handler>::const_iterator it;
+ for(it = handlers.begin(); it != handlers.end() && !event->isStopped(); ++it) {
+ QObject *obj = it->object;
- // TODO: check event flags here!
+ if(ignored.contains(obj)) // object has filtered the event
+ continue;
- void *param[] = {0, Q_ARG(Event *, event).data() };
- it->object->qt_metacall(QMetaObject::InvokeMetaMethod, it->methodIndex, param);
+ if(filters.contains(obj)) { // we have a filter, so let's check if we want to deliver the event
+ Handler filter = filters.value(obj);
+ bool result = false;
+ void *param[] = {Q_RETURN_ARG(bool, result).data(), Q_ARG(Event *, event).data() };
+ obj->qt_metacall(QMetaObject::InvokeMetaMethod, filter.methodIndex, param);
+ if(!result) {
+ ignored.insert(obj);
+ continue; // mmmh, event filter told us to not accept
+ }
+ }
- ++it;
+ // finally, deliverance!
+ void *param[] = {0, Q_ARG(Event *, event).data() };
+ obj->qt_metacall(QMetaObject::InvokeMetaMethod, it->methodIndex, param);
}
- // finally, delete it
+ // that's it
delete event;
}
-void EventManager::insertHandlers(const QList<Handler> &newHandlers, QList<Handler> &existing) {
- foreach(Handler handler, newHandlers) {
+void EventManager::insertHandlers(const QList<Handler> &newHandlers, QList<Handler> &existing, bool checkDupes) {
+ foreach(const Handler &handler, newHandlers) {
if(existing.isEmpty())
existing.append(handler);
else {
- // need to insert it at the proper position
+ // need to insert it at the proper position, but only if we don't yet have a handler for this event and object!
+ bool insert = true;
+ QList<Handler>::iterator insertpos = existing.end();
QList<Handler>::iterator it = existing.begin();
while(it != existing.end()) {
- if(handler.priority > it->priority)
+ if(checkDupes && handler.object == it->object) {
+ insert = false;
break;
+ }
+ if(insertpos == existing.end() && handler.priority > it->priority)
+ insertpos = it;
+
++it;
}
- existing.insert(it, handler);
+ if(insert)
+ existing.insert(it, handler);
}
}
}
+
+// priority is ignored, and only the first (should be most specialized) filter is being used
+// fun things could happen if you used the registerEventFilter() methods in the wrong order though
+void EventManager::insertFilters(const QList<Handler> &newFilters, QHash<QObject *, Handler> &existing) {
+ foreach(const Handler &filter, newFilters) {
+ if(!existing.contains(filter.object))
+ existing[filter.object] = filter;
+ }
+}
+
+QMetaEnum EventManager::_enum;
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