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00024 #include <sys/stat.h>
00025 #ifdef __FreeBSD__
00026 #include <machine/param.h>
00027 #endif
00028 #include <sys/types.h>
00029 #include <sys/ipc.h>
00030 #include <sys/shm.h>
00031
00032 #include <qdir.h>
00033 #include <qfile.h>
00034 #include <qimage.h>
00035 #include <qtimer.h>
00036 #include <qregexp.h>
00037
00038 #include <kdatastream.h>
00039 #include <kfileitem.h>
00040 #include <kapplication.h>
00041 #include <ktempfile.h>
00042 #include <ktrader.h>
00043 #include <kmdcodec.h>
00044 #include <kglobal.h>
00045 #include <kstandarddirs.h>
00046
00047 #include <kio/kservice.h>
00048
00049 #include "previewjob.moc"
00050
00051 namespace KIO { struct PreviewItem; }
00052 using namespace KIO;
00053
00054 struct KIO::PreviewItem
00055 {
00056 KFileItem *item;
00057 KService::Ptr plugin;
00058 };
00059
00060 struct KIO::PreviewJobPrivate
00061 {
00062 enum { STATE_STATORIG,
00063 STATE_GETORIG,
00064 STATE_CREATETHUMB
00065 } state;
00066 KFileItemList initialItems;
00067 const QStringList *enabledPlugins;
00068
00069 QValueList<PreviewItem> items;
00070
00071 PreviewItem currentItem;
00072
00073 time_t tOrig;
00074
00075 QString thumbPath;
00076
00077
00078 QString origName;
00079
00080 QString thumbName;
00081
00082 int width;
00083 int height;
00084
00085 int cacheWidth;
00086 int cacheHeight;
00087
00088 bool bScale;
00089
00090 bool bSave;
00091
00092 QString tempName;
00093
00094 unsigned long maximumSize;
00095
00096 int iconSize;
00097
00098 int iconAlpha;
00099
00100
00101 int shmid;
00102
00103 uchar *shmaddr;
00104
00105 bool deleteItems;
00106 bool succeeded;
00107
00108 QString thumbRoot;
00109 };
00110
00111 PreviewJob::PreviewJob( const KFileItemList &items, int width, int height,
00112 int iconSize, int iconAlpha, bool scale, bool save,
00113 const QStringList *enabledPlugins, bool deleteItems )
00114 : KIO::Job( false )
00115 {
00116 d = new PreviewJobPrivate;
00117 d->tOrig = 0;
00118 d->shmid = -1;
00119 d->shmaddr = 0;
00120 d->initialItems = items;
00121 d->enabledPlugins = enabledPlugins;
00122 d->width = width;
00123 d->height = height ? height : width;
00124 d->cacheWidth = d->width;
00125 d->cacheHeight = d->height;
00126 d->iconSize = iconSize;
00127 d->iconAlpha = iconAlpha;
00128 d->deleteItems = deleteItems;
00129 d->bScale = scale;
00130 d->bSave = save && scale;
00131 d->succeeded = false;
00132 d->currentItem.item = 0;
00133 d->thumbRoot = QDir::homeDirPath() + "/.thumbnails/";
00134
00135
00136 QTimer::singleShot(0, this, SLOT(startPreview()));
00137 }
00138
00139 PreviewJob::~PreviewJob()
00140 {
00141 if (d->shmaddr) {
00142 shmdt((char*)d->shmaddr);
00143 shmctl(d->shmid, IPC_RMID, 0);
00144 }
00145 delete d;
00146 }
00147
00148 void PreviewJob::startPreview()
00149 {
00150
00151 KTrader::OfferList plugins = KTrader::self()->query("ThumbCreator");
00152 QMap<QString, KService::Ptr> mimeMap;
00153
00154 for (KTrader::OfferList::ConstIterator it = plugins.begin(); it != plugins.end(); ++it)
00155 if (!d->enabledPlugins || d->enabledPlugins->contains((*it)->desktopEntryName()))
00156 {
00157 QStringList mimeTypes = (*it)->property("MimeTypes").toStringList();
00158 for (QStringList::ConstIterator mt = mimeTypes.begin(); mt != mimeTypes.end(); ++mt)
00159 mimeMap.insert(*mt, *it);
00160 }
00161
00162
00163 bool bNeedCache = false;
00164 for (KFileItemListIterator it(d->initialItems); it.current(); ++it )
00165 {
00166 PreviewItem item;
00167 item.item = it.current();
00168 QMap<QString, KService::Ptr>::ConstIterator plugin = mimeMap.find(it.current()->mimetype());
00169 if (plugin == mimeMap.end())
00170 {
00171 QString mimeType = it.current()->mimetype();
00172 plugin = mimeMap.find(mimeType.replace(QRegExp("/.*"), "/*"));
00173 }
00174 if (plugin != mimeMap.end())
00175 {
00176 item.plugin = *plugin;
00177 d->items.append(item);
00178 if (!bNeedCache && d->bSave &&
00179 (it.current()->url().protocol() != "file" ||
00180 !it.current()->url().directory( false ).startsWith(d->thumbRoot)) &&
00181 (*plugin)->property("CacheThumbnail").toBool())
00182 bNeedCache = true;
00183 }
00184 else
00185 {
00186 emitFailed(it.current());
00187 if (d->deleteItems)
00188 delete it.current();
00189 }
00190 }
00191
00192
00193 KConfig * config = KGlobal::config();
00194 KConfigGroupSaver cgs( config, "PreviewSettings" );
00195 d->maximumSize = config->readNumEntry( "MaximumSize", 2*1024*1024 );
00196
00197 if (bNeedCache)
00198 {
00199 if (d->width <= 128 && d->height <= 128) d->cacheWidth = d->cacheHeight = 128;
00200 else d->cacheWidth = d->cacheHeight = 256;
00201 d->thumbPath = d->thumbRoot + (d->cacheWidth == 128 ? "normal/" : "large/");
00202 KStandardDirs::makeDir(d->thumbPath, 0700);
00203 }
00204 else
00205 d->bSave = false;
00206 determineNextFile();
00207 }
00208
00209 void PreviewJob::removeItem( const KFileItem *item )
00210 {
00211 for (QValueList<PreviewItem>::Iterator it = d->items.begin(); it != d->items.end(); ++it)
00212 if ((*it).item == item)
00213 {
00214 d->items.remove(it);
00215 break;
00216 }
00217
00218 if (d->currentItem.item == item)
00219 {
00220 subjobs.first()->kill();
00221 subjobs.removeFirst();
00222 determineNextFile();
00223 }
00224 }
00225
00226 void PreviewJob::determineNextFile()
00227 {
00228 if (d->currentItem.item)
00229 {
00230 if (!d->succeeded)
00231 emitFailed();
00232 if (d->deleteItems) {
00233 delete d->currentItem.item;
00234 d->currentItem.item = 0L;
00235 }
00236 }
00237
00238 if ( d->items.isEmpty() )
00239 {
00240 emitResult();
00241 return;
00242 }
00243 else
00244 {
00245
00246 d->state = PreviewJobPrivate::STATE_STATORIG;
00247 d->currentItem = d->items.first();
00248 d->succeeded = false;
00249 d->items.remove(d->items.begin());
00250 KIO::Job *job = KIO::stat( d->currentItem.item->url(), false );
00251 job->addMetaData( "no-auth-prompt", "true" );
00252 addSubjob(job);
00253 }
00254 }
00255
00256 void PreviewJob::slotResult( KIO::Job *job )
00257 {
00258 subjobs.remove( job );
00259 Q_ASSERT ( subjobs.isEmpty() );
00260 switch ( d->state )
00261 {
00262 case PreviewJobPrivate::STATE_STATORIG:
00263 {
00264 if (job->error())
00265 {
00266
00267 determineNextFile();
00268 return;
00269 }
00270 KIO::UDSEntry entry = ((KIO::StatJob*)job)->statResult();
00271 KIO::UDSEntry::ConstIterator it = entry.begin();
00272 d->tOrig = 0;
00273 int found = 0;
00274 for( ; it != entry.end() && found < 2; it++ )
00275 {
00276 if ( (*it).m_uds == KIO::UDS_MODIFICATION_TIME )
00277 {
00278 d->tOrig = (time_t)((*it).m_long);
00279 found++;
00280 }
00281 else if ( (*it).m_uds == KIO::UDS_SIZE )
00282 {
00283 if ( filesize_t((*it).m_long) > d->maximumSize &&
00284 !d->currentItem.plugin->property("IgnoreMaximumSize").toBool() )
00285 {
00286 determineNextFile();
00287 return;
00288 }
00289 found++;
00290 }
00291 }
00292
00293 if ( !d->currentItem.plugin->property( "CacheThumbnail" ).toBool() )
00294 {
00295
00296
00297 getOrCreateThumbnail();
00298 return;
00299 }
00300
00301 if ( statResultThumbnail() )
00302 return;
00303
00304 getOrCreateThumbnail();
00305 return;
00306 }
00307 case PreviewJobPrivate::STATE_GETORIG:
00308 {
00309 if (job->error())
00310 {
00311 determineNextFile();
00312 return;
00313 }
00314
00315 createThumbnail( static_cast<KIO::FileCopyJob*>(job)->destURL().path() );
00316 return;
00317 }
00318 case PreviewJobPrivate::STATE_CREATETHUMB:
00319 {
00320 if (!d->tempName.isEmpty())
00321 {
00322 QFile::remove(d->tempName);
00323 d->tempName = QString::null;
00324 }
00325 determineNextFile();
00326 return;
00327 }
00328 }
00329 }
00330
00331 bool PreviewJob::statResultThumbnail()
00332 {
00333 if ( d->thumbPath.isEmpty() )
00334 return false;
00335
00336 KURL url = d->currentItem.item->url();
00337
00338 url.setPass(QString::null);
00339
00340
00341 if (url.protocol() == "file") d->origName = "file://" + url.path();
00342 else d->origName = url.url();
00343
00344 KMD5 md5( QFile::encodeName( d->origName ) );
00345 d->thumbName = QFile::encodeName( md5.hexDigest() ) + ".png";
00346
00347 QImage thumb;
00348 if ( !thumb.load( d->thumbPath + d->thumbName ) ) return false;
00349
00350 if ( thumb.text( "Thumb::URI", 0 ) != d->origName ||
00351 thumb.text( "Thumb::MTime", 0 ).toInt() != d->tOrig ) return false;
00352
00353
00354 emitPreview( thumb );
00355 d->succeeded = true;
00356 determineNextFile();
00357 return true;
00358 }
00359
00360
00361 void PreviewJob::getOrCreateThumbnail()
00362 {
00363
00364 KURL currentURL = d->currentItem.item->url();
00365 if ( currentURL.isLocalFile() )
00366 createThumbnail( currentURL.path() );
00367 else
00368 {
00369 d->state = PreviewJobPrivate::STATE_GETORIG;
00370 KTempFile localFile;
00371 KURL localURL;
00372 localURL.setPath( d->tempName = localFile.name() );
00373 KIO::Job * job = KIO::file_copy( currentURL, localURL, -1, true,
00374 false, false );
00375 job->addMetaData("thumbnail","1");
00376 addSubjob(job);
00377 }
00378 }
00379
00380
00381 void PreviewJob::createThumbnail( QString pixPath )
00382 {
00383 d->state = PreviewJobPrivate::STATE_CREATETHUMB;
00384 KURL thumbURL;
00385 thumbURL.setProtocol("thumbnail");
00386 thumbURL.setPath(pixPath);
00387 KIO::TransferJob *job = KIO::get(thumbURL, false, false);
00388 addSubjob(job);
00389 connect(job, SIGNAL(data(KIO::Job *, const QByteArray &)), SLOT(slotThumbData(KIO::Job *, const QByteArray &)));
00390 bool save = d->bSave && d->currentItem.plugin->property("CacheThumbnail").toBool();
00391 job->addMetaData("mimeType", d->currentItem.item->mimetype());
00392 job->addMetaData("width", QString().setNum(save ? d->cacheWidth : d->width));
00393 job->addMetaData("height", QString().setNum(save ? d->cacheHeight : d->height));
00394 job->addMetaData("iconSize", QString().setNum(save ? 64 : d->iconSize));
00395 job->addMetaData("iconAlpha", QString().setNum(d->iconAlpha));
00396 job->addMetaData("plugin", d->currentItem.plugin->library());
00397 if (d->shmid == -1)
00398 {
00399 if (d->shmaddr) {
00400 shmdt((char*)d->shmaddr);
00401 shmctl(d->shmid, IPC_RMID, 0);
00402 }
00403 d->shmid = shmget(IPC_PRIVATE, d->cacheWidth * d->cacheHeight * 4, IPC_CREAT|0600);
00404 if (d->shmid != -1)
00405 {
00406 d->shmaddr = static_cast<uchar *>(shmat(d->shmid, 0, SHM_RDONLY));
00407 if (d->shmaddr == (uchar *)-1)
00408 {
00409 shmctl(d->shmid, IPC_RMID, 0);
00410 d->shmaddr = 0;
00411 d->shmid = -1;
00412 }
00413 }
00414 else
00415 d->shmaddr = 0;
00416 }
00417 if (d->shmid != -1)
00418 job->addMetaData("shmid", QString().setNum(d->shmid));
00419 }
00420
00421 void PreviewJob::slotThumbData(KIO::Job *, const QByteArray &data)
00422 {
00423 bool save = d->bSave &&
00424 d->currentItem.plugin->property("CacheThumbnail").toBool() &&
00425 (d->currentItem.item->url().protocol() != "file" ||
00426 !d->currentItem.item->url().directory( false ).startsWith(d->thumbRoot));
00427 QImage thumb;
00428 if (d->shmaddr)
00429 {
00430 QDataStream str(data, IO_ReadOnly);
00431 int width, height, depth;
00432 bool alpha;
00433 str >> width >> height >> depth >> alpha;
00434 thumb = QImage(d->shmaddr, width, height, depth, 0, 0, QImage::IgnoreEndian);
00435 thumb.setAlphaBuffer(alpha);
00436 }
00437 else thumb.loadFromData(data);
00438 if (save)
00439 {
00440 thumb.setText("Thumb::URI", 0, d->origName);
00441 thumb.setText("Thumb::MTime", 0, QString::number(d->tOrig));
00442 thumb.setText("Thumb::Size", 0, number(d->currentItem.item->size()));
00443 thumb.setText("Thumb::Mimetype", 0, d->currentItem.item->mimetype());
00444 thumb.setText("Software", 0, "KDE Thumbnail Generator");
00445 KTempFile temp(d->thumbPath + "kde-tmp-", ".png");
00446 if (temp.status() == 0)
00447 {
00448 thumb.save(temp.name(), "PNG");
00449 rename(QFile::encodeName(temp.name()), QFile::encodeName(d->thumbPath + d->thumbName));
00450 }
00451 }
00452 emitPreview( thumb );
00453 d->succeeded = true;
00454 }
00455
00456 void PreviewJob::emitPreview(const QImage &thumb)
00457 {
00458 QPixmap pix;
00459 if (thumb.width() > d->width || thumb.height() > d->height)
00460 {
00461 double imgRatio = (double)thumb.height() / (double)thumb.width();
00462 if (imgRatio > (double)d->height / (double)d->width)
00463 pix.convertFromImage(
00464 thumb.smoothScale((int)QMAX((double)d->height / imgRatio, 1), d->height));
00465 else pix.convertFromImage(
00466 thumb.smoothScale(d->width, (int)QMAX((double)d->width * imgRatio, 1)));
00467 }
00468 else pix.convertFromImage(thumb);
00469 emit gotPreview(d->currentItem.item, pix);
00470 }
00471
00472 void PreviewJob::emitFailed(const KFileItem *item)
00473 {
00474 if (!item)
00475 item = d->currentItem.item;
00476 emit failed(item);
00477 }
00478
00479 QStringList PreviewJob::availablePlugins()
00480 {
00481 QStringList result;
00482 KTrader::OfferList plugins = KTrader::self()->query("ThumbCreator");
00483 for (KTrader::OfferList::ConstIterator it = plugins.begin(); it != plugins.end(); ++it)
00484 if (!result.contains((*it)->desktopEntryName()))
00485 result.append((*it)->desktopEntryName());
00486 return result;
00487 }
00488
00489 QStringList PreviewJob::supportedMimeTypes()
00490 {
00491 QStringList result;
00492 KTrader::OfferList plugins = KTrader::self()->query("ThumbCreator");
00493 for (KTrader::OfferList::ConstIterator it = plugins.begin(); it != plugins.end(); ++it)
00494 result += (*it)->property("MimeTypes").toStringList();
00495 return result;
00496 }
00497
00498 PreviewJob *KIO::filePreview( const KFileItemList &items, int width, int height,
00499 int iconSize, int iconAlpha, bool scale, bool save,
00500 const QStringList *enabledPlugins )
00501 {
00502 return new PreviewJob(items, width, height, iconSize, iconAlpha,
00503 scale, save, enabledPlugins);
00504 }
00505
00506 PreviewJob *KIO::filePreview( const KURL::List &items, int width, int height,
00507 int iconSize, int iconAlpha, bool scale, bool save,
00508 const QStringList *enabledPlugins )
00509 {
00510 KFileItemList fileItems;
00511 for (KURL::List::ConstIterator it = items.begin(); it != items.end(); ++it)
00512 fileItems.append(new KFileItem(KFileItem::Unknown, KFileItem::Unknown, *it, true));
00513 return new PreviewJob(fileItems, width, height, iconSize, iconAlpha,
00514 scale, save, enabledPlugins, true);
00515 }
00516
00517 void PreviewJob::virtual_hook( int id, void* data )
00518 { KIO::Job::virtual_hook( id, data ); }
00519