52a3801208
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96
149 lines
4.8 KiB
C++
149 lines
4.8 KiB
C++
//------------------------------------------------------------------------------
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// Copyright (c) 2001-2002, OpenBeOS
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// File Name: Handler.cpp
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// Author: Erik Jaesler (erik@cgsoftware.com)
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// Description: BHandler defines the message-handling protocol.
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// MessageReceived() is its lynchpin.
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//------------------------------------------------------------------------------
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#ifndef _HANDLER_H
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#define _HANDLER_H
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// Standard Includes -----------------------------------------------------------
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// System Includes -------------------------------------------------------------
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#include <BeBuild.h>
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#include <Archivable.h>
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// Project Includes ------------------------------------------------------------
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// Local Includes --------------------------------------------------------------
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// Local Defines ---------------------------------------------------------------
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// Globals ---------------------------------------------------------------------
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class BLooper;
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class BMessageFilter;
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class BMessage;
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class BList;
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class _ObserverList;
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#define B_OBSERVE_WHAT_CHANGE "be:observe_change_what"
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#define B_OBSERVE_ORIGINAL_WHAT "be:observe_orig_what"
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const uint32 B_OBSERVER_OBSERVE_ALL = 0xffffffff;
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// BHandler class --------------------------------------------------------------
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class BHandler : public BArchivable {
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public:
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BHandler(const char* name = NULL);
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virtual ~BHandler();
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// Archiving
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BHandler(BMessage* data);
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static BArchivable* Instantiate(BMessage* data);
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virtual status_t Archive(BMessage* data, bool deep = true) const;
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// BHandler guts.
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virtual void MessageReceived(BMessage* message);
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BLooper* Looper() const;
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void SetName(const char* name);
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const char* Name() const;
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virtual void SetNextHandler(BHandler* handler);
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BHandler* NextHandler() const;
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// Message filtering
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virtual void AddFilter(BMessageFilter* filter);
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virtual bool RemoveFilter(BMessageFilter* filter);
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virtual void SetFilterList(BList* filters);
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BList* FilterList();
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bool LockLooper();
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status_t LockLooperWithTimeout(bigtime_t timeout);
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void UnlockLooper();
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// Scripting
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virtual BHandler* ResolveSpecifier(BMessage* msg,
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int32 index,
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BMessage* specifier,
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int32 form,
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const char* property);
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virtual status_t GetSupportedSuites(BMessage* data);
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// Observer calls, inter-looper and inter-team
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status_t StartWatching(BMessenger, uint32 what);
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status_t StartWatchingAll(BMessenger);
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status_t StopWatching(BMessenger, uint32 what);
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status_t StopWatchingAll(BMessenger);
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// Observer calls for observing targets in the same BLooper
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status_t StartWatching(BHandler* , uint32 what);
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status_t StartWatchingAll(BHandler* );
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status_t StopWatching(BHandler* , uint32 what);
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status_t StopWatchingAll(BHandler* );
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// Reserved
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virtual status_t Perform(perform_code d, void* arg);
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// Notifier calls
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virtual void SendNotices(uint32 what, const BMessage* = 0);
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bool IsWatched() const;
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//----- Private or reserved -----------------------------------------
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private:
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typedef BArchivable _inherited;
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friend inline int32 _get_object_token_(const BHandler* );
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friend class BLooper;
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friend class BMessageFilter;
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virtual void _ReservedHandler2();
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virtual void _ReservedHandler3();
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virtual void _ReservedHandler4();
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void InitData(const char* name);
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BHandler(const BHandler&);
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BHandler& operator=(const BHandler&);
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void SetLooper(BLooper* loop);
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int32 fToken;
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char* fName;
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BLooper* fLooper;
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BHandler* fNextHandler;
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BList* fFilters;
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_ObserverList* fObserverList;
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uint32 _reserved[3];
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};
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//------------------------------------------------------------------------------
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#endif // _HANDLER_H
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/*
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* $Log $
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*
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* $Id $
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*
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*/
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