92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/*****************************************************************************/
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// FolderWatcher
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//
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// Author
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// Michael Pfeiffer
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//
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// This application and all source files used in its construction, except
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// where noted, are licensed under the MIT License, and have been written
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// and are:
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//
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// Copyright (c) 2002 OpenBeOS Project
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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
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// in 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
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// OR 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
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// THE 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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#ifndef _FOLDER_WATCHER_H
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#define _FOLDER_WATCHER_H
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#include <Directory.h>
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#include <Entry.h>
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#include <Handler.h>
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#include <Looper.h>
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#include <String.h>
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#include <StorageDefs.h>
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class FolderListener {
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public:
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virtual ~FolderListener() {};
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// entry created or moved into folder
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virtual void EntryCreated(node_ref* node, entry_ref* entry) {};
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// entry removed from folder (or moved to another folder)
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virtual void EntryRemoved(node_ref* node) {};
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// attribute of an entry has changed
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virtual void AttributeChanged(node_ref* node) {};
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};
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// The class FolderWatcher watches creation, deletion of files in a directory
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// and optionally watches attribute changes of files in the directory.
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class FolderWatcher : public BHandler {
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typedef BHandler inherited;
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private:
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BDirectory fFolder;
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FolderListener* fListener;
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bool fWatchAttrChanges;
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bool BuildEntryRef(BMessage* msg, const char* dirName, entry_ref* entry);
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bool BuildNodeRef(BMessage* msg, node_ref* node);
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void HandleCreatedEntry(BMessage* msg, const char* dirName);
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void HandleRemovedEntry(BMessage* msg);
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void HandleChangedAttr(BMessage* msg);
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public:
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// start node watching (optionally watch attribute changes)
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FolderWatcher(BLooper* looper, const BDirectory& folder, bool watchAttrChanges = false);
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// stop node watching
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virtual ~FolderWatcher();
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void MessageReceived(BMessage* msg);
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// the directory
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BDirectory* Folder() { return &fFolder; }
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// set listener that is notified of changes in the directory
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void SetListener(FolderListener* listener);
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// start/stop watching of attribute changes
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status_t StartAttrWatching(node_ref* node);
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status_t StopAttrWatching(node_ref* node);
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};
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#endif
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