gwenview/lib/mimetypeutils.cpp

   1 // vim: set tabstop=4 shiftwidth=4 noexpandtab
   2 /*
   3 Gwenview - A simple image viewer for KDE
   4 Copyright 2006 Aurelien Gateau <aurelien.gateau@free.fr>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19
  20 */
  21 #include "mimetypeutils.h"
  22 #include "mimetypeutils_p.moc"
  23
  24 // Qt
  25 #include <QApplication>
  26 #include <QStringList>
  27
  28 // KDE
  29 #include <kapplication.h>
  30 #include <kdebug.h>
  31 #include <kfileitem.h>
  32 #include <kio/job.h>
  33 #include <kio/jobclasses.h>
  34 #include <kio/netaccess.h>
  35 #include <kmimetype.h>
  36 #include <kurl.h>
  37
  38 #include <kimageio.h>
  39
  40 // Local
  41 #include "archiveutils.h"
  42
  43
  44 namespace Gwenview {
  45
  46 namespace MimeTypeUtils {
  47
  48
  49 const QStringList& dirMimeTypes() {
  50         static QStringList list;
  51         if (list.isEmpty()) {
  52                 list << "inode/directory";
  53                 list += ArchiveUtils::mimeTypes();
  54         }
  55         return list;
  56 }
  57
  58
  59 const QStringList& rasterImageMimeTypes() {
  60         static QStringList list;
  61         if (list.isEmpty()) {
  62                 list=KImageIO::mimeTypes(KImageIO::Reading);
  63         }
  64         return list;
  65 }
  66
  67
  68 const QStringList& svgImageMimeTypes() {
  69         static QStringList list;
  70         if (list.isEmpty()) {
  71                 list.append("image/svg+xml");
  72                 // FIXME svgz
  73         }
  74         return list;
  75 }
  76
  77
  78 const QStringList& imageMimeTypes() {
  79         static QStringList list;
  80         if (list.isEmpty()) {
  81                 list = rasterImageMimeTypes();
  82                 list += svgImageMimeTypes();
  83         }
  84
  85         return list;
  86 }
  87
  88
  89 const QStringList& videoMimeTypes() {
  90         static QStringList list;
  91         if (list.isEmpty()) {
  92 #ifdef __GNUC__
  93         #warning implement MimeTypeUtils::videoMimeTypes()
  94 #endif
  95         }
  96
  97         return list;
  98 }
  99
 100
 101 QString urlMimeType(const KUrl& url) {
 102         // Try a simple guess, using extension for remote urls
 103         QString mimeType = KMimeType::findByUrl(url)->name();
 104         if (mimeType == "application/octet-stream") {
 105                 // No luck, look deeper. This can happens with http urls if the filename
 106                 // does not provide any extension.
 107                 mimeType = KIO::NetAccess::mimetype(url, KApplication::kApplication()->activeWindow());
 108         }
 109         return mimeType;
 110 }
 111
 112
 113 QString urlMimeTypeByContent(const KUrl& url) {
 114         const int HEADER_SIZE = 30;
 115         if (url.isLocalFile()) {
 116                 return KMimeType::findByFileContent(url.path())->name();
 117         }
 118
 119         KIO::TransferJob* job = KIO::get(url);
 120         DataAccumulator accumulator(job);
 121         while (!accumulator.finished() && accumulator.data().size() < HEADER_SIZE) {
 122                 qApp->processEvents(QEventLoop::ExcludeUserInputEvents);
 123         }
 124         return KMimeType::findByContent(accumulator.data())->name();
 125 }
 126
 127 Kind mimeTypeKind(const QString& mimeType) {
 128         if (mimeType.startsWith("inode/directory")) {
 129                 return KIND_DIR;
 130         }
 131         if (ArchiveUtils::mimeTypes().contains(mimeType)) {
 132                 return KIND_ARCHIVE;
 133         }
 134         if (rasterImageMimeTypes().contains(mimeType)) {
 135                 return KIND_RASTER_IMAGE;
 136         }
 137         if (svgImageMimeTypes().contains(mimeType)) {
 138                 return KIND_SVG_IMAGE;
 139         }
 140
 141         return KIND_FILE;
 142 }
 143
 144
 145 Kind fileItemKind(const KFileItem& item) {
 146         return mimeTypeKind(item.mimetype());
 147 }
 148
 149
 150 Kind urlKind(const KUrl& url) {
 151         return mimeTypeKind(urlMimeType(url));
 152 }
 153
 154
 155 DataAccumulator::DataAccumulator(KIO::TransferJob* job)
 156 : QObject()
 157 , mFinished(false)
 158 {
 159         connect(job, SIGNAL(data(KIO::Job*, const QByteArray&)),
 160                 SLOT(slotDataReceived(KIO::Job*, const QByteArray&)) );
 161         connect(job, SIGNAL(result(KJob*)),
 162                 SLOT(slotFinished()) );
 163 }
 164
 165
 166 void DataAccumulator::slotDataReceived(KIO::Job*, const QByteArray& data) {
 167         mData += data;
 168 }
 169
 170
 171 void DataAccumulator::slotFinished() {
 172         mFinished = true;
 173 }
 174
 175
 176 } // namespace MimeTypeUtils
 177 } // namespace Gwenview