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#include "watcher.h"
#include "../shared/systemFunctions.h"
#include "functions.h"
#include <wx/intl.h>
#include <wx/filefn.h>
#include "../shared/fileHandling.h"
#ifdef FFS_WIN
#include <wx/msw/wrapwin.h> //includes "windows.h"
#elif defined FFS_LINUX
#include <wx/timer.h>
#include <exception>
#include "../shared/inotify/inotify-cxx.h"
#include "../shared/fileTraverser.h"
#endif
#ifdef FFS_WIN
class ChangeNotifications
{
public:
~ChangeNotifications()
{
for (std::vector<HANDLE>::const_iterator i = arrayHandle.begin(); i != arrayHandle.end(); ++i)
if (*i != INVALID_HANDLE_VALUE)
::FindCloseChangeNotification(*i);
}
void addHandle(const HANDLE hndl)
{
arrayHandle.push_back(hndl);
}
size_t getSize()
{
return arrayHandle.size();
}
const HANDLE* getArray()
{
return &arrayHandle[0]; //client needs to check getSize() before calling this method!
}
private:
std::vector<HANDLE> arrayHandle;
};
#elif defined FFS_LINUX
class DirsOnlyTraverser : public FreeFileSync::TraverseCallback
{
public:
DirsOnlyTraverser(std::vector<std::string>& dirs) : m_dirs(dirs) {}
virtual ReturnValue onFile(const DefaultChar* shortName, const Zstring& fullName, const FileInfo& details)
{
return TRAVERSING_CONTINUE;
}
virtual ReturnValDir onDir(const DefaultChar* shortName, const Zstring& fullName)
{
m_dirs.push_back(fullName.c_str());
return ReturnValDir(ReturnValDir::Continue(), this);
}
virtual ReturnValue onError(const wxString& errorText)
{
throw FreeFileSync::FileError(errorText);
}
private:
std::vector<std::string>& m_dirs;
};
#endif
void RealtimeSync::waitForChanges(const std::vector<wxString>& dirNames, WaitCallback* statusHandler)
{
if (dirNames.empty()) //pathological case, but check is needed later
return;
#ifdef FFS_WIN
ChangeNotifications notifications;
for (std::vector<wxString>::const_iterator i = dirNames.begin(); i != dirNames.end(); ++i)
{
const Zstring formattedDir = FreeFileSync::getFormattedDirectoryName(i->c_str());
if (formattedDir.empty())
throw FreeFileSync::FileError(_("Please fill all empty directory fields."));
else if (!FreeFileSync::dirExists(formattedDir))
throw FreeFileSync::FileError(wxString(_("Directory does not exist:")) + wxT("\n") +
wxT("\"") + formattedDir + wxT("\"") + wxT("\n\n") +
FreeFileSync::getLastErrorFormatted());
const HANDLE rv = ::FindFirstChangeNotification(
formattedDir.c_str(), //__in LPCTSTR lpPathName,
true, //__in BOOL bWatchSubtree,
FILE_NOTIFY_CHANGE_FILE_NAME |
FILE_NOTIFY_CHANGE_DIR_NAME |
FILE_NOTIFY_CHANGE_SIZE |
FILE_NOTIFY_CHANGE_LAST_WRITE); //__in DWORD dwNotifyFilter
if (rv == INVALID_HANDLE_VALUE)
{
const wxString errorMessage = wxString(_("Could not initialize directory monitoring:")) + wxT("\n\"") + *i + wxT("\"");
throw FreeFileSync::FileError(errorMessage + wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
}
notifications.addHandle(rv);
}
while (true)
{
const DWORD rv = ::WaitForMultipleObjects( //NOTE: notifications.getArray() returns valid pointer, because it cannot be empty in this context
notifications.getSize(), //__in DWORD nCount,
notifications.getArray(), //__in const HANDLE *lpHandles,
false, //__in BOOL bWaitAll,
UI_UPDATE_INTERVAL); //__in DWORD dwMilliseconds
if (WAIT_OBJECT_0 <= rv && rv < WAIT_OBJECT_0 + notifications.getSize())
return; //directory change detected
else if (rv == WAIT_FAILED)
throw FreeFileSync::FileError(wxString(_("Error when monitoring directories.")) + wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
else if (rv == WAIT_TIMEOUT)
statusHandler->requestUiRefresh();
}
#elif defined FFS_LINUX
std::vector<std::string> fullDirList;
//add all subdirectories
for (std::vector<wxString>::const_iterator i = dirNames.begin(); i != dirNames.end(); ++i)
{
const Zstring formattedDir = FreeFileSync::getFormattedDirectoryName(i->c_str());
if (formattedDir.empty())
throw FreeFileSync::FileError(_("Please fill all empty directory fields."));
else if (!FreeFileSync::dirExists(formattedDir))
throw FreeFileSync::FileError(wxString(_("Directory does not exist:")) + wxT("\n") +
wxT("\"") + formattedDir + wxT("\"") + wxT("\n\n") +
FreeFileSync::getLastErrorFormatted());
fullDirList.push_back(formattedDir.c_str());
//get all subdirectories
DirsOnlyTraverser traverser(fullDirList);
FreeFileSync::traverseFolder(formattedDir, false, &traverser); //don't traverse into symlinks (analog to windows build)
}
try
{
Inotify notifications;
notifications.SetNonBlock(true);
for (std::vector<std::string>::const_iterator i = fullDirList.begin(); i != fullDirList.end(); ++i)
{
try
{
InotifyWatch newWatch(*i, //dummy object: InotifyWatch may be destructed safely after Inotify::Add()
IN_DONT_FOLLOW | //don't follow symbolic links
IN_ONLYDIR | //watch directories only
IN_CLOSE_WRITE |
IN_CREATE |
IN_DELETE |
IN_DELETE_SELF |
IN_MODIFY |
IN_MOVE_SELF |
IN_MOVED_FROM |
IN_MOVED_TO );
notifications.Add(newWatch);
}
catch (const InotifyException& e)
{
const wxString errorMessage = wxString(_("Could not initialize directory monitoring:")) + wxT("\n\"") + *i + wxT("\"");
throw FreeFileSync::FileError(errorMessage + wxT("\n\n") + e.GetMessage().c_str());
}
}
while (true)
{
notifications.WaitForEvents(); //called in non-blocking mode
if (notifications.GetEventCount() > 0)
return; //directory change detected
wxMilliSleep(RealtimeSync::UI_UPDATE_INTERVAL);
statusHandler->requestUiRefresh();
}
}
catch (const InotifyException& e)
{
throw FreeFileSync::FileError(wxString(_("Error when monitoring directories.")) + wxT("\n\n") + e.GetMessage().c_str());
}
catch (const std::exception& e)
{
throw FreeFileSync::FileError(wxString(_("Error when monitoring directories.")) + wxT("\n\n") + e.what());
}
#endif
}
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