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/*
* Copyright (C) by Markus Goetz <markus@woboq.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "config.h"
#include "folder.h"
#include "folderwatcher.h"
#include "folderwatcher_mac.h"
#include <cerrno>
#include <QDirIterator>
#include <QStringList>
namespace OCC {
FolderWatcherPrivate::FolderWatcherPrivate(FolderWatcher *p, const QString &path)
: _parent(p)
, _folder(path)
{
this->startWatching();
}
FolderWatcherPrivate::~FolderWatcherPrivate()
{
FSEventStreamStop(_stream);
FSEventStreamInvalidate(_stream);
FSEventStreamRelease(_stream);
}
static void callback(
ConstFSEventStreamRef streamRef,
void *clientCallBackInfo,
size_t numEvents,
void *eventPathsVoid,
const FSEventStreamEventFlags eventFlags[],
const FSEventStreamEventId eventIds[])
{
Q_UNUSED(streamRef)
Q_UNUSED(eventFlags)
Q_UNUSED(eventIds)
const FSEventStreamEventFlags c_interestingFlags = kFSEventStreamEventFlagItemCreated // for new folder/file
| kFSEventStreamEventFlagItemRemoved // for rm
| kFSEventStreamEventFlagItemInodeMetaMod // for mtime change
| kFSEventStreamEventFlagItemRenamed // also coming for moves to trash in finder
| kFSEventStreamEventFlagItemModified; // for content change
//We ignore other flags, e.g. for owner change, xattr change, Finder label change etc
qCDebug(lcFolderWatcher) << "FolderWatcherPrivate::callback by OS X";
QStringList paths;
CFArrayRef eventPaths = (CFArrayRef)eventPathsVoid;
for (int i = 0; i < static_cast<int>(numEvents); ++i) {
CFStringRef path = reinterpret_cast<CFStringRef>(CFArrayGetValueAtIndex(eventPaths, i));
QString qstring;
CFIndex pathLength = CFStringGetLength(path);
qstring.resize(pathLength);
CFStringGetCharacters(path, CFRangeMake(0, pathLength), reinterpret_cast<UniChar *>(qstring.data()));
QString fn = qstring.normalized(QString::NormalizationForm_C);
if (!(eventFlags[i] & c_interestingFlags)) {
qCDebug(lcFolderWatcher) << "Ignoring non-content changes for" << fn << eventFlags[i];
continue;
}
paths.append(fn);
}
reinterpret_cast<FolderWatcherPrivate *>(clientCallBackInfo)->doNotifyParent(paths);
}
void FolderWatcherPrivate::startWatching()
{
qCDebug(lcFolderWatcher) << "FolderWatcherPrivate::startWatching()" << _folder;
CFStringRef folderCF = CFStringCreateWithCharacters(0, reinterpret_cast<const UniChar *>(_folder.unicode()),
_folder.length());
CFArrayRef pathsToWatch = CFStringCreateArrayBySeparatingStrings(nullptr, folderCF, CFSTR(":"));
FSEventStreamContext ctx = { 0, this, nullptr, nullptr, nullptr };
_stream = FSEventStreamCreate(nullptr,
&callback,
&ctx,
pathsToWatch,
kFSEventStreamEventIdSinceNow,
0, // latency
kFSEventStreamCreateFlagUseCFTypes | kFSEventStreamCreateFlagFileEvents | kFSEventStreamCreateFlagIgnoreSelf);
CFRelease(pathsToWatch);
CFRelease(folderCF);
FSEventStreamScheduleWithRunLoop(_stream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
FSEventStreamStart(_stream);
}
QStringList FolderWatcherPrivate::addCoalescedPaths(const QStringList &paths) const
{
QStringList coalescedPaths;
for (const auto &eventPath : paths) {
if (QDir(eventPath).exists()) {
QDirIterator it(eventPath, QDir::AllDirs | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
while (it.hasNext()) {
auto subfolder = it.next();
if (!paths.contains(subfolder)) {
coalescedPaths.append(subfolder);
}
}
}
}
return (paths + coalescedPaths);
}
void FolderWatcherPrivate::doNotifyParent(const QStringList &paths)
{
const QStringList totalPaths = addCoalescedPaths(paths);
_parent->changeDetected(totalPaths);
}
} // ns mirall
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