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|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <tools/diagnose_ex.h>
#include <com/sun/star/awt/SystemPointer.hpp>
#include <com/sun/star/awt/MouseButton.hpp>
#include <com/sun/star/awt/MouseEvent.hpp>
#include <delayevent.hxx>
#include <usereventqueue.hxx>
#include <cursormanager.hxx>
#include <vector>
#include <queue>
#include <map>
#include <algorithm>
using namespace com::sun::star;
/* Implementation of UserEventQueue class */
namespace slideshow::internal {
namespace {
typedef std::vector<EventSharedPtr> ImpEventVector;
typedef std::queue<EventSharedPtr> ImpEventQueue;
typedef std::map<uno::Reference<animations::XAnimationNode>,
ImpEventVector> ImpAnimationEventMap;
typedef std::map<ShapeSharedPtr, ImpEventQueue,
Shape::lessThanShape> ImpShapeEventMap;
// MouseEventHandler base class, not consuming any event:
class MouseEventHandler_ : public MouseEventHandler
{
public:
virtual bool handleMousePressed( awt::MouseEvent const& /*e*/ ) override { return false;}
virtual bool handleMouseReleased( awt::MouseEvent const& /*e*/) override { return false;}
virtual bool handleMouseDragged( awt::MouseEvent const& /*e*/ ) override { return false;}
virtual bool handleMouseMoved( awt::MouseEvent const& /*e*/ ) override { return false; }
};
/** @return one event has been posted
*/
template <typename ContainerT>
bool fireSingleEvent( ContainerT & rQueue, EventQueue & rEventQueue )
{
// post next event in given queue:
while (! rQueue.empty())
{
EventSharedPtr const pEvent(rQueue.front());
rQueue.pop();
// skip all inactive events (as the purpose of
// nextEventFromQueue() is to activate the next
// event, and events which return false on
// isCharged() will never be activated by the
// EventQueue)
if(pEvent->isCharged())
return rEventQueue.addEvent( pEvent );
}
return false; // no more (active) events in queue
}
/** @return at least one event has been posted
*/
template <typename ContainerT>
bool fireAllEvents( ContainerT & rQueue, EventQueue & rEventQueue )
{
bool bFiredAny = false;
while (fireSingleEvent( rQueue, rEventQueue ))
bFiredAny = true;
return bFiredAny;
}
class EventContainer
{
public:
EventContainer() :
maEvents()
{}
void addEvent( const EventSharedPtr& rEvent )
{
maEvents.push( rEvent );
}
protected:
ImpEventQueue maEvents;
};
} // anon namespace
class AllAnimationEventHandler : public AnimationEventHandler
{
public:
explicit AllAnimationEventHandler( EventQueue& rEventQueue ) :
mrEventQueue( rEventQueue ),
maAnimationEventMap()
{}
virtual bool handleAnimationEvent( const AnimationNodeSharedPtr& rNode ) override
{
ENSURE_OR_RETURN_FALSE(
rNode,
"AllAnimationEventHandler::handleAnimationEvent(): Invalid node" );
bool bRet( false );
ImpAnimationEventMap::iterator aIter;
if( (aIter=maAnimationEventMap.find(
rNode->getXAnimationNode() )) != maAnimationEventMap.end() )
{
ImpEventVector& rVec( aIter->second );
bRet = !rVec.empty();
// registered node found -> fire all events in the vector
for( const auto& pEvent : rVec )
mrEventQueue.addEvent( pEvent );
rVec.clear();
}
return bRet;
}
void addEvent( const EventSharedPtr& rEvent,
const uno::Reference< animations::XAnimationNode >& xNode )
{
ImpAnimationEventMap::iterator aIter;
if( (aIter=maAnimationEventMap.find( xNode )) ==
maAnimationEventMap.end() )
{
// no entry for this animation -> create one
aIter = maAnimationEventMap.emplace( xNode, ImpEventVector() ).first;
}
// add new event to queue
aIter->second.push_back( rEvent );
}
private:
EventQueue& mrEventQueue;
ImpAnimationEventMap maAnimationEventMap;
};
class ClickEventHandler : public MouseEventHandler_,
public EventHandler,
public EventContainer
{
public:
explicit ClickEventHandler( EventQueue& rEventQueue ) :
EventContainer(),
mrEventQueue( rEventQueue ),
mbAdvanceOnClick( true )
{}
void setAdvanceOnClick( bool bAdvanceOnClick )
{
mbAdvanceOnClick = bAdvanceOnClick;
}
private:
// triggered by API calls, e.g. space bar
virtual bool handleEvent() override
{
return handleEvent_impl();
}
// triggered by mouse release:
virtual bool handleMouseReleased( const awt::MouseEvent& evt ) override
{
if(evt.Buttons != awt::MouseButton::LEFT)
return false;
if( mbAdvanceOnClick ) {
// fire next event
return handleEvent_impl();
}
else {
return false; // advance-on-click disabled
}
}
// triggered by both:
virtual bool handleEvent_impl()
{
// fire next event:
return fireSingleEvent( maEvents, mrEventQueue );
}
private:
EventQueue& mrEventQueue;
bool mbAdvanceOnClick;
};
class SkipEffectEventHandler : public ClickEventHandler
{
public:
SkipEffectEventHandler( EventQueue & rEventQueue,
EventMultiplexer & rEventMultiplexer )
: ClickEventHandler(rEventQueue),
mrEventQueue(rEventQueue),
mrEventMultiplexer(rEventMultiplexer),
mbSkipTriggersNextEffect(true) {}
/** Remember to trigger (or not to trigger) the next effect after the
current effect is skipped.
*/
void setSkipTriggersNextEffect (const bool bSkipTriggersNextEffect)
{ mbSkipTriggersNextEffect = bSkipTriggersNextEffect; }
/// Skip the current effect but do not trigger the next effect.
void skipEffect() { handleEvent_impl(false); }
private:
virtual bool handleEvent_impl() override
{
return handleEvent_impl(true);
}
bool handleEvent_impl (bool bNotifyNextEffect)
{
// fire all events, so animation nodes can register their
// next effect listeners:
if(fireAllEvents( maEvents, mrEventQueue ))
{
if (mbSkipTriggersNextEffect && bNotifyNextEffect)
{
// then simulate a next effect event: this skip effect
// handler is triggered upon next effect events (multiplexer
// prio=-1)! Posting a notifyNextEffect() here is only safe
// (we don't run into busy loop), because we assume that
// someone has registered above for next effects
// (multiplexer prio=0) at the user event queue.
return mrEventQueue.addEventWhenQueueIsEmpty(
makeEvent( [this] () {
this->mrEventMultiplexer.notifyNextEffect();
}, "EventMultiplexer::notifyNextEffect") );
}
else
return true;
}
return false;
}
private:
EventQueue & mrEventQueue;
EventMultiplexer & mrEventMultiplexer;
bool mbSkipTriggersNextEffect;
};
namespace {
/** Base class to share some common code between
ShapeClickEventHandler and MouseMoveHandler
@derive override necessary MouseEventHandler interface methods,
call sendEvent() method to actually process the event.
*/
class MouseHandlerBase : public MouseEventHandler_
{
public:
explicit MouseHandlerBase( EventQueue& rEventQueue ) :
mrEventQueue( rEventQueue ),
maShapeEventMap()
{}
void addEvent( const EventSharedPtr& rEvent,
const ShapeSharedPtr& rShape )
{
ImpShapeEventMap::iterator aIter;
if( (aIter=maShapeEventMap.find( rShape )) == maShapeEventMap.end() )
{
// no entry for this shape -> create one
aIter = maShapeEventMap.emplace(rShape, ImpEventQueue()).first;
}
// add new event to queue
aIter->second.push( rEvent );
}
protected:
bool hitTest( const awt::MouseEvent& e,
ImpShapeEventMap::reverse_iterator& o_rHitShape )
{
// find hit shape in map
const basegfx::B2DPoint aPosition( e.X, e.Y );
// find matching shape (scan reversely, to coarsely match
// paint order)
auto aCurrShape = std::find_if(maShapeEventMap.rbegin(), maShapeEventMap.rend(),
[&aPosition](const ImpShapeEventMap::value_type& rShape) {
// TODO(F2): Get proper geometry polygon from the
// shape, to avoid having areas outside the shape
// react on the mouse
return rShape.first->getBounds().isInside( aPosition )
&& rShape.first->isVisible();
});
if (aCurrShape != maShapeEventMap.rend())
{
// shape hit, and shape is visible - report a
// hit
o_rHitShape = aCurrShape;
return true;
}
return false; // nothing hit
}
bool sendEvent( ImpShapeEventMap::reverse_iterator const & io_rHitShape )
{
// take next event from queue
const bool bRet( fireSingleEvent( io_rHitShape->second,
mrEventQueue ) );
// clear shape entry, if its queue is
// empty. This is important, since the shapes
// are held by shared ptr, and might otherwise
// not get released, even after their owning
// slide is long gone.
if( io_rHitShape->second.empty() )
{
// this looks funny, since ::std::map does
// provide an erase( iterator )
// method. Unfortunately, C++ does not
// declare the obvious erase(
// reverse_iterator ) needed here (missing
// orthogonality, eh?)
maShapeEventMap.erase( io_rHitShape->first );
}
return bRet;
}
bool processEvent( const awt::MouseEvent& e )
{
ImpShapeEventMap::reverse_iterator aCurrShape;
if( hitTest( e, aCurrShape ) )
return sendEvent( aCurrShape );
return false; // did not handle the event
}
private:
EventQueue& mrEventQueue;
ImpShapeEventMap maShapeEventMap;
};
}
class ShapeClickEventHandler : public MouseHandlerBase
{
public:
ShapeClickEventHandler( CursorManager& rCursorManager,
EventQueue& rEventQueue ) :
MouseHandlerBase( rEventQueue ),
mrCursorManager( rCursorManager )
{}
virtual bool handleMouseReleased( const awt::MouseEvent& e ) override
{
if(e.Buttons != awt::MouseButton::LEFT)
return false;
return processEvent( e );
}
virtual bool handleMouseMoved( const awt::MouseEvent& e ) override
{
// TODO(P2): Maybe buffer last shape touched
// if we have a shape click event, and the mouse
// hovers over this shape, change cursor to hand
ImpShapeEventMap::reverse_iterator aDummy;
if( hitTest( e, aDummy ) )
mrCursorManager.requestCursor( awt::SystemPointer::REFHAND );
return false; // we don't /eat/ this event. Lower prio
// handler should see it, too.
}
private:
CursorManager& mrCursorManager;
};
class MouseEnterHandler : public MouseHandlerBase
{
public:
explicit MouseEnterHandler( EventQueue& rEventQueue )
: MouseHandlerBase( rEventQueue ),
mpLastShape() {}
virtual bool handleMouseMoved( const awt::MouseEvent& e ) override
{
// TODO(P2): Maybe buffer last shape touched, and
// check against that _first_
ImpShapeEventMap::reverse_iterator aCurr;
if( hitTest( e, aCurr ) )
{
if( aCurr->first != mpLastShape )
{
// we actually hit a shape, and it's different
// from the previous one - thus we just
// entered it, raise event
sendEvent( aCurr );
mpLastShape = aCurr->first;
}
}
else
{
// don't hit no shape - thus, last shape is NULL
mpLastShape.reset();
}
return false; // we don't /eat/ this event. Lower prio
// handler should see it, too.
}
private:
ShapeSharedPtr mpLastShape;
};
class MouseLeaveHandler : public MouseHandlerBase
{
public:
explicit MouseLeaveHandler( EventQueue& rEventQueue )
: MouseHandlerBase( rEventQueue ),
maLastIter() {}
virtual bool handleMouseMoved( const awt::MouseEvent& e ) override
{
// TODO(P2): Maybe buffer last shape touched, and
// check against that _first_
ImpShapeEventMap::reverse_iterator aCurr;
if( hitTest( e, aCurr ) )
{
maLastIter = aCurr;
}
else
{
if( maLastIter->first )
{
// last time, we were over a shape, now we're
// not - we thus just left that shape, raise
// event
sendEvent( maLastIter );
}
// in any case, when we hit this else-branch: no
// shape hit, thus have to clear maLastIter
maLastIter = ImpShapeEventMap::reverse_iterator();
}
return false; // we don't /eat/ this event. Lower prio
// handler should see it, too.
}
private:
ImpShapeEventMap::reverse_iterator maLastIter;
};
template< typename Handler, typename Functor >
void UserEventQueue::registerEvent(
std::shared_ptr< Handler >& rHandler,
const EventSharedPtr& rEvent,
const Functor& rRegistrationFunctor )
{
ENSURE_OR_THROW( rEvent,
"UserEventQueue::registerEvent(): Invalid event" );
if( !rHandler ) {
// create handler
rHandler = std::make_shared<Handler>( mrEventQueue );
// register handler on EventMultiplexer
rRegistrationFunctor( rHandler );
}
rHandler->addEvent( rEvent );
}
template< typename Handler, typename Arg, typename Functor >
void UserEventQueue::registerEvent(
std::shared_ptr< Handler >& rHandler,
const EventSharedPtr& rEvent,
const Arg& rArg,
const Functor& rRegistrationFunctor )
{
ENSURE_OR_THROW( rEvent,
"UserEventQueue::registerEvent(): Invalid event" );
if( !rHandler ) {
// create handler
rHandler = std::make_shared<Handler>( mrEventQueue );
// register handler on EventMultiplexer
rRegistrationFunctor( rHandler );
}
rHandler->addEvent( rEvent, rArg );
}
UserEventQueue::UserEventQueue( EventMultiplexer& rMultiplexer,
EventQueue& rEventQueue,
CursorManager& rCursorManager )
: mrMultiplexer( rMultiplexer ),
mrEventQueue( rEventQueue ),
mrCursorManager( rCursorManager ),
mpAnimationStartEventHandler(),
mpAnimationEndEventHandler(),
mpAudioStoppedEventHandler(),
mpClickEventHandler(),
mpSkipEffectEventHandler(),
mpDoubleClickEventHandler(),
mpMouseEnterHandler(),
mpMouseLeaveHandler(),
mbAdvanceOnClick( true )
{
}
UserEventQueue::~UserEventQueue()
{
try
{
// unregister all handlers
clear();
}
catch (const uno::Exception&)
{
TOOLS_WARN_EXCEPTION("slideshow", "");
}
}
void UserEventQueue::clear()
{
// unregister and delete all handlers
if( mpAnimationStartEventHandler ) {
mrMultiplexer.removeAnimationStartHandler(
mpAnimationStartEventHandler );
mpAnimationStartEventHandler.reset();
}
if( mpAnimationEndEventHandler ) {
mrMultiplexer.removeAnimationEndHandler( mpAnimationEndEventHandler );
mpAnimationEndEventHandler.reset();
}
if( mpAudioStoppedEventHandler ) {
mrMultiplexer.removeAudioStoppedHandler( mpAudioStoppedEventHandler );
mpAudioStoppedEventHandler.reset();
}
if( mpShapeClickEventHandler ) {
mrMultiplexer.removeClickHandler( mpShapeClickEventHandler );
mrMultiplexer.removeMouseMoveHandler( mpShapeClickEventHandler );
mpShapeClickEventHandler.reset();
}
if( mpClickEventHandler ) {
mrMultiplexer.removeClickHandler( mpClickEventHandler );
mrMultiplexer.removeNextEffectHandler( mpClickEventHandler );
mpClickEventHandler.reset();
}
if(mpSkipEffectEventHandler) {
mrMultiplexer.removeClickHandler( mpSkipEffectEventHandler );
mrMultiplexer.removeNextEffectHandler( mpSkipEffectEventHandler );
mpSkipEffectEventHandler.reset();
}
if( mpShapeDoubleClickEventHandler ) {
mrMultiplexer.removeDoubleClickHandler( mpShapeDoubleClickEventHandler );
mrMultiplexer.removeMouseMoveHandler( mpShapeDoubleClickEventHandler );
mpShapeDoubleClickEventHandler.reset();
}
if( mpDoubleClickEventHandler ) {
mrMultiplexer.removeDoubleClickHandler( mpDoubleClickEventHandler );
mpDoubleClickEventHandler.reset();
}
if( mpMouseEnterHandler ) {
mrMultiplexer.removeMouseMoveHandler( mpMouseEnterHandler );
mpMouseEnterHandler.reset();
}
if( mpMouseLeaveHandler ) {
mrMultiplexer.removeMouseMoveHandler( mpMouseLeaveHandler );
mpMouseLeaveHandler.reset();
}
}
void UserEventQueue::setAdvanceOnClick( bool bAdvanceOnClick )
{
mbAdvanceOnClick = bAdvanceOnClick;
// forward to handler, if existing. Otherwise, the handler
// creation will do the forwarding.
if( mpClickEventHandler )
mpClickEventHandler->setAdvanceOnClick( bAdvanceOnClick );
}
void UserEventQueue::registerAnimationStartEvent(
const EventSharedPtr& rEvent,
const uno::Reference< animations::XAnimationNode>& xNode )
{
registerEvent( mpAnimationStartEventHandler,
rEvent,
xNode,
[this]( const AnimationEventHandlerSharedPtr& rHandler )
{ return this->mrMultiplexer.addAnimationStartHandler( rHandler ); } );
}
void UserEventQueue::registerAnimationEndEvent(
const EventSharedPtr& rEvent,
const uno::Reference<animations::XAnimationNode>& xNode )
{
registerEvent( mpAnimationEndEventHandler,
rEvent,
xNode,
[this]( const AnimationEventHandlerSharedPtr& rHandler )
{ return this->mrMultiplexer.addAnimationEndHandler( rHandler ); } );
}
void UserEventQueue::registerAudioStoppedEvent(
const EventSharedPtr& rEvent,
const uno::Reference<animations::XAnimationNode>& xNode )
{
registerEvent( mpAudioStoppedEventHandler,
rEvent,
xNode,
[this]( const AnimationEventHandlerSharedPtr& rHandler )
{ return this->mrMultiplexer.addAudioStoppedHandler( rHandler ); } );
}
void UserEventQueue::registerShapeClickEvent( const EventSharedPtr& rEvent,
const ShapeSharedPtr& rShape )
{
ENSURE_OR_THROW(
rEvent,
"UserEventQueue::registerShapeClickEvent(): Invalid event" );
if( !mpShapeClickEventHandler )
{
// create handler
mpShapeClickEventHandler =
std::make_shared<ShapeClickEventHandler>(mrCursorManager,
mrEventQueue);
// register handler on EventMultiplexer
mrMultiplexer.addClickHandler( mpShapeClickEventHandler, 1.0 );
mrMultiplexer.addMouseMoveHandler( mpShapeClickEventHandler, 1.0 );
}
mpShapeClickEventHandler->addEvent( rEvent, rShape );
}
namespace {
class ClickEventRegistrationFunctor
{
public:
ClickEventRegistrationFunctor( EventMultiplexer& rMultiplexer,
double nPrio,
bool bAdvanceOnClick )
: mrMultiplexer( rMultiplexer ),
mnPrio(nPrio),
mbAdvanceOnClick( bAdvanceOnClick ) {}
void operator()( const std::shared_ptr<ClickEventHandler>& rHandler )const
{
// register the handler on _two_ sources: we want the
// nextEffect events, e.g. space bar, to trigger clicks, as well!
mrMultiplexer.addClickHandler( rHandler, mnPrio );
mrMultiplexer.addNextEffectHandler( rHandler, mnPrio );
// forward advance-on-click state to newly
// generated handler (that's the only reason why
// we're called here)
rHandler->setAdvanceOnClick( mbAdvanceOnClick );
}
private:
EventMultiplexer& mrMultiplexer;
double const mnPrio;
bool const mbAdvanceOnClick;
};
} // anon namespace
void UserEventQueue::registerNextEffectEvent( const EventSharedPtr& rEvent )
{
// TODO: better name may be mpNextEffectEventHandler? then we have
// next effect (=> waiting to be started)
// skip effect (skipping the currently running one)
// rewind effect (rewinding back running one and waiting (again)
// to be started)
registerEvent( mpClickEventHandler,
rEvent,
ClickEventRegistrationFunctor( mrMultiplexer,
0.0 /* default prio */,
mbAdvanceOnClick ) );
}
void UserEventQueue::registerSkipEffectEvent(
EventSharedPtr const & pEvent,
const bool bSkipTriggersNextEffect)
{
if(!mpSkipEffectEventHandler)
{
mpSkipEffectEventHandler =
std::make_shared<SkipEffectEventHandler>( mrEventQueue, mrMultiplexer );
// register the handler on _two_ sources: we want the
// nextEffect events, e.g. space bar, to trigger clicks, as well!
mrMultiplexer.addClickHandler( mpSkipEffectEventHandler,
-1.0 /* prio below default */ );
mrMultiplexer.addNextEffectHandler( mpSkipEffectEventHandler,
-1.0 /* prio below default */ );
// forward advance-on-click state to newly
// generated handler (that's the only reason why
// we're called here)
mpSkipEffectEventHandler->setAdvanceOnClick( mbAdvanceOnClick );
}
mpSkipEffectEventHandler->setSkipTriggersNextEffect(bSkipTriggersNextEffect);
mpSkipEffectEventHandler->addEvent( pEvent );
}
void UserEventQueue::registerShapeDoubleClickEvent(
const EventSharedPtr& rEvent,
const ShapeSharedPtr& rShape )
{
ENSURE_OR_THROW(
rEvent,
"UserEventQueue::registerShapeDoubleClickEvent(): Invalid event" );
if( !mpShapeDoubleClickEventHandler )
{
// create handler
mpShapeDoubleClickEventHandler =
std::make_shared<ShapeClickEventHandler>(mrCursorManager,
mrEventQueue);
// register handler on EventMultiplexer
mrMultiplexer.addDoubleClickHandler( mpShapeDoubleClickEventHandler,
1.0 );
mrMultiplexer.addMouseMoveHandler( mpShapeDoubleClickEventHandler,
1.0 );
}
mpShapeDoubleClickEventHandler->addEvent( rEvent, rShape );
}
void UserEventQueue::registerMouseEnterEvent( const EventSharedPtr& rEvent,
const ShapeSharedPtr& rShape )
{
registerEvent( mpMouseEnterHandler,
rEvent,
rShape,
[this]( const MouseEventHandlerSharedPtr& rHandler )
{ return this->mrMultiplexer.addMouseMoveHandler( rHandler, 0.0 ); } );
}
void UserEventQueue::registerMouseLeaveEvent( const EventSharedPtr& rEvent,
const ShapeSharedPtr& rShape )
{
registerEvent( mpMouseLeaveHandler,
rEvent,
rShape,
[this]( const MouseEventHandlerSharedPtr& rHandler )
{ return this->mrMultiplexer.addMouseMoveHandler( rHandler, 0.0 ); } );
}
void UserEventQueue::callSkipEffectEventHandler()
{
::std::shared_ptr<SkipEffectEventHandler> pHandler (
::std::dynamic_pointer_cast<SkipEffectEventHandler>(mpSkipEffectEventHandler));
if (pHandler)
pHandler->skipEffect();
}
} // namespace presentation
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