d32895c5d8
This allows the program to distinguish between some other, unspecified, warnings and this one which can and does happen whenever too many changes occur too quickly but which has a clearly defined work around: the state kept inside the program just needs to be refreshed by rescanning the directory anew. See #12847. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74950 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
412 lines
12 KiB
C++
412 lines
12 KiB
C++
/////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/fswatcher.h
|
|
// Purpose: wxFileSystemWatcherBase
|
|
// Author: Bartosz Bekier
|
|
// Created: 2009-05-23
|
|
// Copyright: (c) 2009 Bartosz Bekier <bartosz.bekier@gmail.com>
|
|
// Licence: wxWindows licence
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_FSWATCHER_BASE_H_
|
|
#define _WX_FSWATCHER_BASE_H_
|
|
|
|
#include "wx/defs.h"
|
|
|
|
#if wxUSE_FSWATCHER
|
|
|
|
#include "wx/log.h"
|
|
#include "wx/event.h"
|
|
#include "wx/evtloop.h"
|
|
#include "wx/filename.h"
|
|
#include "wx/dir.h"
|
|
#include "wx/hashmap.h"
|
|
|
|
#define wxTRACE_FSWATCHER "fswatcher"
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxFileSystemWatcherEventType & wxFileSystemWatcherEvent
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Possible types of file system events.
|
|
* This is a subset that will work fine an all platforms (actually, we will
|
|
* see how it works on Mac).
|
|
*
|
|
* We got 2 types of error events:
|
|
* - warning: these are not fatal and further events can still be generated
|
|
* - error: indicates fatal error and causes that no more events will happen
|
|
*/
|
|
enum
|
|
{
|
|
wxFSW_EVENT_CREATE = 0x01,
|
|
wxFSW_EVENT_DELETE = 0x02,
|
|
wxFSW_EVENT_RENAME = 0x04,
|
|
wxFSW_EVENT_MODIFY = 0x08,
|
|
wxFSW_EVENT_ACCESS = 0x10,
|
|
wxFSW_EVENT_ATTRIB = 0x20, // Currently this is wxGTK-only
|
|
|
|
// error events
|
|
wxFSW_EVENT_WARNING = 0x40,
|
|
wxFSW_EVENT_ERROR = 0x80,
|
|
wxFSW_EVENT_ALL = wxFSW_EVENT_CREATE | wxFSW_EVENT_DELETE |
|
|
wxFSW_EVENT_RENAME | wxFSW_EVENT_MODIFY |
|
|
wxFSW_EVENT_ACCESS | wxFSW_EVENT_ATTRIB |
|
|
wxFSW_EVENT_WARNING | wxFSW_EVENT_ERROR
|
|
#ifdef wxHAS_INOTIFY
|
|
,wxFSW_EVENT_UNMOUNT = 0x2000
|
|
#endif
|
|
};
|
|
|
|
// Type of the path watched, used only internally for now.
|
|
enum wxFSWPathType
|
|
{
|
|
wxFSWPath_None, // Invalid value for an initialized watch.
|
|
wxFSWPath_File, // Plain file.
|
|
wxFSWPath_Dir, // Watch a directory and the files in it.
|
|
wxFSWPath_Tree // Watch a directory and all its children recursively.
|
|
};
|
|
|
|
// Type of the warning for the events notifying about them.
|
|
enum wxFSWWarningType
|
|
{
|
|
wxFSW_WARNING_NONE,
|
|
wxFSW_WARNING_GENERAL,
|
|
wxFSW_WARNING_OVERFLOW
|
|
};
|
|
|
|
/**
|
|
* Event containing information about file system change.
|
|
*/
|
|
class WXDLLIMPEXP_FWD_BASE wxFileSystemWatcherEvent;
|
|
wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_BASE, wxEVT_FSWATCHER,
|
|
wxFileSystemWatcherEvent);
|
|
|
|
class WXDLLIMPEXP_BASE wxFileSystemWatcherEvent: public wxEvent
|
|
{
|
|
public:
|
|
// Constructor for any kind of events, also used as default ctor.
|
|
wxFileSystemWatcherEvent(int changeType = 0, int watchid = wxID_ANY) :
|
|
wxEvent(watchid, wxEVT_FSWATCHER),
|
|
m_changeType(changeType),
|
|
m_warningType(wxFSW_WARNING_NONE)
|
|
{
|
|
}
|
|
|
|
// Constructor for the error or warning events.
|
|
wxFileSystemWatcherEvent(int changeType,
|
|
wxFSWWarningType warningType,
|
|
const wxString& errorMsg = wxString(),
|
|
int watchid = wxID_ANY) :
|
|
wxEvent(watchid, wxEVT_FSWATCHER),
|
|
m_changeType(changeType),
|
|
m_warningType(warningType),
|
|
m_errorMsg(errorMsg)
|
|
{
|
|
}
|
|
|
|
// Constructor for the normal events carrying information about the changes.
|
|
wxFileSystemWatcherEvent(int changeType,
|
|
const wxFileName& path, const wxFileName& newPath,
|
|
int watchid = wxID_ANY) :
|
|
wxEvent(watchid, wxEVT_FSWATCHER),
|
|
m_changeType(changeType),
|
|
m_warningType(wxFSW_WARNING_NONE),
|
|
m_path(path),
|
|
m_newPath(newPath)
|
|
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Returns the path at which the event occurred.
|
|
*/
|
|
const wxFileName& GetPath() const
|
|
{
|
|
return m_path;
|
|
}
|
|
|
|
/**
|
|
* Sets the path at which the event occurred
|
|
*/
|
|
void SetPath(const wxFileName& path)
|
|
{
|
|
m_path = path;
|
|
}
|
|
|
|
/**
|
|
* In case of rename(move?) events, returns the new path related to the
|
|
* event. The "new" means newer in the sense of time. In case of other
|
|
* events it returns the same path as GetPath().
|
|
*/
|
|
const wxFileName& GetNewPath() const
|
|
{
|
|
return m_newPath;
|
|
}
|
|
|
|
/**
|
|
* Sets the new path related to the event. See above.
|
|
*/
|
|
void SetNewPath(const wxFileName& path)
|
|
{
|
|
m_newPath = path;
|
|
}
|
|
|
|
/**
|
|
* Returns the type of file system event that occurred.
|
|
*/
|
|
int GetChangeType() const
|
|
{
|
|
return m_changeType;
|
|
}
|
|
|
|
virtual wxEvent* Clone() const
|
|
{
|
|
wxFileSystemWatcherEvent* evt = new wxFileSystemWatcherEvent(*this);
|
|
evt->m_errorMsg = m_errorMsg.Clone();
|
|
evt->m_path = wxFileName(m_path.GetFullPath().Clone());
|
|
evt->m_newPath = wxFileName(m_newPath.GetFullPath().Clone());
|
|
evt->m_warningType = m_warningType;
|
|
return evt;
|
|
}
|
|
|
|
virtual wxEventCategory GetEventCategory() const
|
|
{
|
|
// TODO this has to be merged with "similar" categories and changed
|
|
return wxEVT_CATEGORY_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* Returns if this error is an error event
|
|
*/
|
|
bool IsError() const
|
|
{
|
|
return (m_changeType & (wxFSW_EVENT_ERROR | wxFSW_EVENT_WARNING)) != 0;
|
|
}
|
|
|
|
wxString GetErrorDescription() const
|
|
{
|
|
return m_errorMsg;
|
|
}
|
|
|
|
wxFSWWarningType GetWarningType() const
|
|
{
|
|
return m_warningType;
|
|
}
|
|
|
|
/**
|
|
* Returns a wxString describing an event useful for debugging or testing
|
|
*/
|
|
wxString ToString() const;
|
|
|
|
protected:
|
|
int m_changeType;
|
|
wxFSWWarningType m_warningType;
|
|
wxFileName m_path;
|
|
wxFileName m_newPath;
|
|
wxString m_errorMsg;
|
|
private:
|
|
DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxFileSystemWatcherEvent)
|
|
};
|
|
|
|
typedef void (wxEvtHandler::*wxFileSystemWatcherEventFunction)
|
|
(wxFileSystemWatcherEvent&);
|
|
|
|
#define wxFileSystemWatcherEventHandler(func) \
|
|
wxEVENT_HANDLER_CAST(wxFileSystemWatcherEventFunction, func)
|
|
|
|
#define EVT_FSWATCHER(winid, func) \
|
|
wx__DECLARE_EVT1(wxEVT_FSWATCHER, winid, wxFileSystemWatcherEventHandler(func))
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxFileSystemWatcherBase: interface for wxFileSystemWatcher
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// Simple container to store information about one watched path.
|
|
class wxFSWatchInfo
|
|
{
|
|
public:
|
|
wxFSWatchInfo() :
|
|
m_events(-1), m_type(wxFSWPath_None), m_refcount(-1)
|
|
{
|
|
}
|
|
|
|
wxFSWatchInfo(const wxString& path,
|
|
int events,
|
|
wxFSWPathType type,
|
|
const wxString& filespec = wxString()) :
|
|
m_path(path), m_filespec(filespec), m_events(events), m_type(type),
|
|
m_refcount(1)
|
|
{
|
|
}
|
|
|
|
const wxString& GetPath() const
|
|
{
|
|
return m_path;
|
|
}
|
|
|
|
const wxString& GetFilespec() const { return m_filespec; }
|
|
|
|
int GetFlags() const
|
|
{
|
|
return m_events;
|
|
}
|
|
|
|
wxFSWPathType GetType() const
|
|
{
|
|
return m_type;
|
|
}
|
|
|
|
// Reference counting of watch entries is used to avoid watching the same
|
|
// file system path multiple times (this can happen even accidentally, e.g.
|
|
// when you have a recursive watch and then decide to watch some file or
|
|
// directory under it separately).
|
|
int IncRef()
|
|
{
|
|
return ++m_refcount;
|
|
}
|
|
|
|
int DecRef()
|
|
{
|
|
wxASSERT_MSG( m_refcount > 0, wxS("Trying to decrement a zero count") );
|
|
return --m_refcount;
|
|
}
|
|
|
|
protected:
|
|
wxString m_path;
|
|
wxString m_filespec; // For tree watches, holds any filespec to apply
|
|
int m_events;
|
|
wxFSWPathType m_type;
|
|
int m_refcount;
|
|
};
|
|
|
|
WX_DECLARE_STRING_HASH_MAP(wxFSWatchInfo, wxFSWatchInfoMap);
|
|
|
|
/**
|
|
* Encapsulation of platform-specific file system event mechanism
|
|
*/
|
|
class wxFSWatcherImpl;
|
|
|
|
/**
|
|
* Main entry point for clients interested in file system events.
|
|
* Defines interface that can be used to receive that kind of events.
|
|
*/
|
|
class WXDLLIMPEXP_BASE wxFileSystemWatcherBase: public wxEvtHandler
|
|
{
|
|
public:
|
|
wxFileSystemWatcherBase();
|
|
|
|
virtual ~wxFileSystemWatcherBase();
|
|
|
|
/**
|
|
* Adds path to currently watched files. Any events concerning this
|
|
* particular path will be sent to handler. Optionally a filter can be
|
|
* specified to receive only events of particular type.
|
|
*
|
|
* Please note that when adding a dir, immediate children will be watched
|
|
* as well.
|
|
*/
|
|
virtual bool Add(const wxFileName& path, int events = wxFSW_EVENT_ALL);
|
|
|
|
/**
|
|
* Like above, but recursively adds every file/dir in the tree rooted in
|
|
* path. Additionally a file mask can be specified to include only files
|
|
* of particular type.
|
|
*/
|
|
virtual bool AddTree(const wxFileName& path, int events = wxFSW_EVENT_ALL,
|
|
const wxString& filespec = wxEmptyString);
|
|
|
|
/**
|
|
* Removes path from the list of watched paths.
|
|
*/
|
|
virtual bool Remove(const wxFileName& path);
|
|
|
|
/**
|
|
* Same as above, but also removes every file belonging to the tree rooted
|
|
* at path.
|
|
*/
|
|
virtual bool RemoveTree(const wxFileName& path);
|
|
|
|
/**
|
|
* Clears the list of currently watched paths.
|
|
*/
|
|
virtual bool RemoveAll();
|
|
|
|
/**
|
|
* Returns the number of watched paths
|
|
*/
|
|
int GetWatchedPathsCount() const;
|
|
|
|
/**
|
|
* Retrevies all watched paths and places them in wxArrayString. Returns
|
|
* the number of paths.
|
|
*
|
|
* TODO think about API here: we need to return more information (like is
|
|
* the path watched recursively)
|
|
*/
|
|
int GetWatchedPaths(wxArrayString* paths) const;
|
|
|
|
wxEvtHandler* GetOwner() const
|
|
{
|
|
return m_owner;
|
|
}
|
|
|
|
void SetOwner(wxEvtHandler* handler)
|
|
{
|
|
if (!handler)
|
|
m_owner = this;
|
|
else
|
|
m_owner = handler;
|
|
}
|
|
|
|
|
|
// This is a semi-private function used by wxWidgets itself only.
|
|
//
|
|
// Delegates the real work of adding the path to wxFSWatcherImpl::Add() and
|
|
// updates m_watches if the new path was successfully added.
|
|
bool AddAny(const wxFileName& path, int events, wxFSWPathType type,
|
|
const wxString& filespec = wxString());
|
|
|
|
protected:
|
|
|
|
static wxString GetCanonicalPath(const wxFileName& path)
|
|
{
|
|
wxFileName path_copy = wxFileName(path);
|
|
if ( !path_copy.Normalize() )
|
|
{
|
|
wxFAIL_MSG(wxString::Format("Unable to normalize path '%s'",
|
|
path.GetFullPath()));
|
|
return wxEmptyString;
|
|
}
|
|
|
|
return path_copy.GetFullPath();
|
|
}
|
|
|
|
|
|
wxFSWatchInfoMap m_watches; // path=>wxFSWatchInfo map
|
|
wxFSWatcherImpl* m_service; // file system events service
|
|
wxEvtHandler* m_owner; // handler for file system events
|
|
|
|
friend class wxFSWatcherImpl;
|
|
};
|
|
|
|
// include the platform specific file defining wxFileSystemWatcher
|
|
// inheriting from wxFileSystemWatcherBase
|
|
|
|
#ifdef wxHAS_INOTIFY
|
|
#include "wx/unix/fswatcher_inotify.h"
|
|
#define wxFileSystemWatcher wxInotifyFileSystemWatcher
|
|
#elif defined(wxHAS_KQUEUE)
|
|
#include "wx/unix/fswatcher_kqueue.h"
|
|
#define wxFileSystemWatcher wxKqueueFileSystemWatcher
|
|
#elif defined(__WINDOWS__)
|
|
#include "wx/msw/fswatcher.h"
|
|
#define wxFileSystemWatcher wxMSWFileSystemWatcher
|
|
#else
|
|
#include "wx/generic/fswatcher.h"
|
|
#define wxFileSystemWatcher wxPollingFileSystemWatcher
|
|
#endif
|
|
|
|
#endif // wxUSE_FSWATCHER
|
|
|
|
#endif /* _WX_FSWATCHER_BASE_H_ */
|