f37d449208
This wrapper simply combines the calls to MakeAbsolute() and GetFullPath(), but using it results in shorter and more clear code, so it seems to be worth having.
408 lines
12 KiB
C++
408 lines
12 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/fswatcher.h
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// Purpose: wxFileSystemWatcherBase
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// Author: Bartosz Bekier
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// Created: 2009-05-23
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// Copyright: (c) 2009 Bartosz Bekier <bartosz.bekier@gmail.com>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_FSWATCHER_BASE_H_
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#define _WX_FSWATCHER_BASE_H_
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#include "wx/defs.h"
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#if wxUSE_FSWATCHER
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#include "wx/log.h"
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#include "wx/event.h"
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#include "wx/evtloop.h"
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#include "wx/filename.h"
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#include "wx/dir.h"
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#include "wx/hashmap.h"
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#define wxTRACE_FSWATCHER "fswatcher"
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// ----------------------------------------------------------------------------
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// wxFileSystemWatcherEventType & wxFileSystemWatcherEvent
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// ----------------------------------------------------------------------------
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/**
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* Possible types of file system events.
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* This is a subset that will work fine an all platforms (actually, we will
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* see how it works on Mac).
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*
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* We got 2 types of error events:
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* - warning: these are not fatal and further events can still be generated
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* - error: indicates fatal error and causes that no more events will happen
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*/
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enum
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{
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wxFSW_EVENT_CREATE = 0x01,
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wxFSW_EVENT_DELETE = 0x02,
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wxFSW_EVENT_RENAME = 0x04,
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wxFSW_EVENT_MODIFY = 0x08,
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wxFSW_EVENT_ACCESS = 0x10,
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wxFSW_EVENT_ATTRIB = 0x20, // Currently this is wxGTK-only
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// error events
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wxFSW_EVENT_WARNING = 0x40,
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wxFSW_EVENT_ERROR = 0x80,
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wxFSW_EVENT_ALL = wxFSW_EVENT_CREATE | wxFSW_EVENT_DELETE |
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wxFSW_EVENT_RENAME | wxFSW_EVENT_MODIFY |
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wxFSW_EVENT_ACCESS | wxFSW_EVENT_ATTRIB |
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wxFSW_EVENT_WARNING | wxFSW_EVENT_ERROR
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#if defined(wxHAS_INOTIFY) || defined(wxHAVE_FSEVENTS_FILE_NOTIFICATIONS)
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,wxFSW_EVENT_UNMOUNT = 0x2000
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#endif
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};
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// Type of the path watched, used only internally for now.
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enum wxFSWPathType
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{
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wxFSWPath_None, // Invalid value for an initialized watch.
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wxFSWPath_File, // Plain file.
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wxFSWPath_Dir, // Watch a directory and the files in it.
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wxFSWPath_Tree // Watch a directory and all its children recursively.
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};
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// Type of the warning for the events notifying about them.
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enum wxFSWWarningType
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{
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wxFSW_WARNING_NONE,
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wxFSW_WARNING_GENERAL,
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wxFSW_WARNING_OVERFLOW
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};
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/**
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* Event containing information about file system change.
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*/
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class WXDLLIMPEXP_FWD_BASE wxFileSystemWatcherEvent;
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wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_BASE, wxEVT_FSWATCHER,
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wxFileSystemWatcherEvent);
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class WXDLLIMPEXP_BASE wxFileSystemWatcherEvent: public wxEvent
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{
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public:
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// Constructor for any kind of events, also used as default ctor.
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wxFileSystemWatcherEvent(int changeType = 0, int watchid = wxID_ANY) :
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wxEvent(watchid, wxEVT_FSWATCHER),
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m_changeType(changeType),
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m_warningType(wxFSW_WARNING_NONE)
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{
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}
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// Constructor for the error or warning events.
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wxFileSystemWatcherEvent(int changeType,
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wxFSWWarningType warningType,
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const wxString& errorMsg = wxString(),
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int watchid = wxID_ANY) :
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wxEvent(watchid, wxEVT_FSWATCHER),
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m_changeType(changeType),
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m_warningType(warningType),
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m_errorMsg(errorMsg)
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{
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}
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// Constructor for the normal events carrying information about the changes.
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wxFileSystemWatcherEvent(int changeType,
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const wxFileName& path, const wxFileName& newPath,
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int watchid = wxID_ANY) :
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wxEvent(watchid, wxEVT_FSWATCHER),
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m_changeType(changeType),
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m_warningType(wxFSW_WARNING_NONE),
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m_path(path),
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m_newPath(newPath)
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{
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}
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/**
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* Returns the path at which the event occurred.
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*/
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const wxFileName& GetPath() const
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{
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return m_path;
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}
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/**
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* Sets the path at which the event occurred
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*/
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void SetPath(const wxFileName& path)
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{
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m_path = path;
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}
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/**
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* In case of rename(move?) events, returns the new path related to the
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* event. The "new" means newer in the sense of time. In case of other
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* events it returns the same path as GetPath().
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*/
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const wxFileName& GetNewPath() const
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{
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return m_newPath;
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}
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/**
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* Sets the new path related to the event. See above.
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*/
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void SetNewPath(const wxFileName& path)
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{
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m_newPath = path;
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}
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/**
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* Returns the type of file system event that occurred.
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*/
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int GetChangeType() const
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{
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return m_changeType;
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}
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virtual wxEvent* Clone() const wxOVERRIDE
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{
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wxFileSystemWatcherEvent* evt = new wxFileSystemWatcherEvent(*this);
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evt->m_errorMsg = m_errorMsg.Clone();
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evt->m_path = wxFileName(m_path.GetFullPath().Clone());
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evt->m_newPath = wxFileName(m_newPath.GetFullPath().Clone());
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evt->m_warningType = m_warningType;
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return evt;
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}
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virtual wxEventCategory GetEventCategory() const wxOVERRIDE
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{
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// TODO this has to be merged with "similar" categories and changed
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return wxEVT_CATEGORY_UNKNOWN;
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}
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/**
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* Returns if this error is an error event
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*/
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bool IsError() const
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{
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return (m_changeType & (wxFSW_EVENT_ERROR | wxFSW_EVENT_WARNING)) != 0;
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}
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wxString GetErrorDescription() const
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{
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return m_errorMsg;
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}
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wxFSWWarningType GetWarningType() const
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{
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return m_warningType;
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}
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/**
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* Returns a wxString describing an event useful for debugging or testing
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*/
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wxString ToString() const;
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protected:
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int m_changeType;
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wxFSWWarningType m_warningType;
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wxFileName m_path;
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wxFileName m_newPath;
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wxString m_errorMsg;
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private:
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wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxFileSystemWatcherEvent);
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};
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typedef void (wxEvtHandler::*wxFileSystemWatcherEventFunction)
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(wxFileSystemWatcherEvent&);
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#define wxFileSystemWatcherEventHandler(func) \
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wxEVENT_HANDLER_CAST(wxFileSystemWatcherEventFunction, func)
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#define EVT_FSWATCHER(winid, func) \
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wx__DECLARE_EVT1(wxEVT_FSWATCHER, winid, wxFileSystemWatcherEventHandler(func))
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// ----------------------------------------------------------------------------
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// wxFileSystemWatcherBase: interface for wxFileSystemWatcher
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// ----------------------------------------------------------------------------
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// Simple container to store information about one watched path.
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class wxFSWatchInfo
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{
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public:
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wxFSWatchInfo() :
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m_events(-1), m_type(wxFSWPath_None), m_refcount(-1)
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{
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}
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wxFSWatchInfo(const wxString& path,
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int events,
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wxFSWPathType type,
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const wxString& filespec = wxString()) :
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m_path(path), m_filespec(filespec), m_events(events), m_type(type),
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m_refcount(1)
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{
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}
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const wxString& GetPath() const
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{
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return m_path;
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}
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const wxString& GetFilespec() const { return m_filespec; }
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int GetFlags() const
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{
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return m_events;
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}
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wxFSWPathType GetType() const
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{
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return m_type;
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}
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// Reference counting of watch entries is used to avoid watching the same
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// file system path multiple times (this can happen even accidentally, e.g.
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// when you have a recursive watch and then decide to watch some file or
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// directory under it separately).
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int IncRef()
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{
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return ++m_refcount;
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}
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int DecRef()
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{
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wxASSERT_MSG( m_refcount > 0, wxS("Trying to decrement a zero count") );
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return --m_refcount;
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}
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protected:
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wxString m_path;
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wxString m_filespec; // For tree watches, holds any filespec to apply
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int m_events;
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wxFSWPathType m_type;
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int m_refcount;
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};
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WX_DECLARE_STRING_HASH_MAP(wxFSWatchInfo, wxFSWatchInfoMap);
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/**
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* Encapsulation of platform-specific file system event mechanism
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*/
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class wxFSWatcherImpl;
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/**
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* Main entry point for clients interested in file system events.
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* Defines interface that can be used to receive that kind of events.
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*/
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class WXDLLIMPEXP_BASE wxFileSystemWatcherBase: public wxEvtHandler
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{
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public:
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wxFileSystemWatcherBase();
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virtual ~wxFileSystemWatcherBase();
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/**
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* Adds path to currently watched files. Any events concerning this
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* particular path will be sent to handler. Optionally a filter can be
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* specified to receive only events of particular type.
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*
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* Please note that when adding a dir, immediate children will be watched
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* as well.
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*/
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virtual bool Add(const wxFileName& path, int events = wxFSW_EVENT_ALL);
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/**
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* Like above, but recursively adds every file/dir in the tree rooted in
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* path. Additionally a file mask can be specified to include only files
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* of particular type.
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*/
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virtual bool AddTree(const wxFileName& path, int events = wxFSW_EVENT_ALL,
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const wxString& filespec = wxEmptyString);
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/**
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* Removes path from the list of watched paths.
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*/
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virtual bool Remove(const wxFileName& path);
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/**
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* Same as above, but also removes every file belonging to the tree rooted
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* at path.
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*/
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virtual bool RemoveTree(const wxFileName& path);
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/**
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* Clears the list of currently watched paths.
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*/
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virtual bool RemoveAll();
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/**
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* Returns the number of watched paths
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*/
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int GetWatchedPathsCount() const;
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/**
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* Retrieves all watched paths and places them in wxArrayString. Returns
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* the number of paths.
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*
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* TODO think about API here: we need to return more information (like is
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* the path watched recursively)
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*/
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int GetWatchedPaths(wxArrayString* paths) const;
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wxEvtHandler* GetOwner() const
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{
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return m_owner;
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}
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void SetOwner(wxEvtHandler* handler)
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{
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if (!handler)
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m_owner = this;
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else
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m_owner = handler;
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}
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// This is a semi-private function used by wxWidgets itself only.
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//
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// Delegates the real work of adding the path to wxFSWatcherImpl::Add() and
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// updates m_watches if the new path was successfully added.
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bool AddAny(const wxFileName& path, int events, wxFSWPathType type,
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const wxString& filespec = wxString());
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protected:
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static wxString GetCanonicalPath(const wxFileName& path)
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{
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return path.GetAbsolutePath();
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}
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wxFSWatchInfoMap m_watches; // path=>wxFSWatchInfo map
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wxFSWatcherImpl* m_service; // file system events service
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wxEvtHandler* m_owner; // handler for file system events
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friend class wxFSWatcherImpl;
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};
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// include the platform specific file defining wxFileSystemWatcher
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// inheriting from wxFileSystemWatcherBase
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#ifdef wxHAS_INOTIFY
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#include "wx/unix/fswatcher_inotify.h"
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#define wxFileSystemWatcher wxInotifyFileSystemWatcher
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#elif defined(wxHAS_KQUEUE) && defined(wxHAVE_FSEVENTS_FILE_NOTIFICATIONS)
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#include "wx/unix/fswatcher_kqueue.h"
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#include "wx/osx/fswatcher_fsevents.h"
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#define wxFileSystemWatcher wxFsEventsFileSystemWatcher
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#elif defined(wxHAS_KQUEUE)
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#include "wx/unix/fswatcher_kqueue.h"
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#define wxFileSystemWatcher wxKqueueFileSystemWatcher
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#elif defined(__WINDOWS__)
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#include "wx/msw/fswatcher.h"
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#define wxFileSystemWatcher wxMSWFileSystemWatcher
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#else
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#include "wx/generic/fswatcher.h"
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#define wxFileSystemWatcher wxPollingFileSystemWatcher
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#endif
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#endif // wxUSE_FSWATCHER
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#endif /* _WX_FSWATCHER_BASE_H_ */
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