src/panels/information/kloadmetadatathread.cpp

   1 /*****************************************************************************
   2  * Copyright (C) 2009 by Peter Penz <peter.penz@gmx.at>                      *
   3  * Copyright (C) 2009 by Sebastian Trueg <trueg@kde.org>                     *
   4  *                                                                           *
   5  * This library is free software; you can redistribute it and/or             *
   6  * modify it under the terms of the GNU Library General Public               *
   7  * License version 2 as published by the Free Software Foundation.           *
   8  *                                                                           *
   9  * This library is distributed in the hope that it will be useful,           *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Library General Public License for more details.                          *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Library General Public License *
  15  * along with this library; see the file COPYING.LIB.  If not, write to      *
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,      *
  17  * Boston, MA 02110-1301, USA.                                               *
  18  *****************************************************************************/
  19
  20 #include "kloadmetadatathread_p.h"
  21
  22 #include "nfotranslator.h"
  23
  24 #include <kconfig.h>
  25 #include <kconfiggroup.h>
  26 #include <kfilemetainfo.h>
  27 #include <kfilemetainfoitem.h>
  28 #include <kglobal.h>
  29 #include <klocale.h>
  30 #include <kprotocolinfo.h>
  31
  32 #include <nepomuk/resource.h>
  33
  34 KLoadMetaDataThread::KLoadMetaDataThread() :
  35     m_rating(0),
  36     m_comment(),
  37     m_tags(),
  38     m_items(),
  39     m_files(),
  40     m_urls(),
  41     m_canceled(false)
  42 {
  43 }
  44
  45 KLoadMetaDataThread::~KLoadMetaDataThread()
  46 {
  47 }
  48
  49 void KLoadMetaDataThread::load(const KUrl::List& urls)
  50 {
  51     m_urls = urls;
  52     m_canceled = false;
  53     start();
  54 }
  55
  56 void KLoadMetaDataThread::cancel()
  57 {
  58     // Setting m_canceled to true will cancel KLoadMetaDataThread::run()
  59     // as soon as run() gets the chance to check m_cancel.
  60     m_canceled = true;
  61 }
  62
  63 void KLoadMetaDataThread::cancelAndDelete()
  64 {
  65     if (isFinished()) {
  66         Q_ASSERT(!isRunning());
  67         deleteLater();
  68     } else {
  69         connect(this, SIGNAL(finished()), this, SLOT(slotFinished()));
  70         // Setting m_canceled to true will cancel KLoadMetaDataThread::run()
  71         // as soon as run() gets the chance to check m_cancel.
  72         m_canceled = true;
  73         // Afterwards the thread will delete itself
  74         // asynchronously inside slotFinished().
  75     }
  76 }
  77
  78 void KLoadMetaDataThread::run()
  79 {
  80     KConfig config("kmetainformationrc", KConfig::NoGlobals);
  81     KConfigGroup settings = config.group("Show");
  82
  83     bool first = true;
  84     foreach (const KUrl& url, m_urls) {
  85         if (m_canceled) {
  86             return;
  87         }
  88
  89         Nepomuk::Resource file(url);
  90         if (!file.isValid()) {
  91             continue;
  92         }
  93
  94         m_files.insert(url, file);
  95
  96         if (!first && (m_rating != file.rating())) {
  97             m_rating = 0; // reset rating
  98         } else if (first) {
  99             m_rating = file.rating();
 100         }
 101
 102         if (!first && (m_comment != file.description())) {
 103             m_comment.clear(); // reset comment
 104         } else if (first) {
 105             m_comment = file.description();
 106         }
 107
 108         if (!first && (m_tags != file.tags())) {
 109             m_tags.clear(); // reset tags
 110         } else if (first) {
 111             m_tags = file.tags();
 112         }
 113
 114         const NfoTranslator& nfo = NfoTranslator::instance();
 115         if (first && (m_urls.count() == 1)) {
 116             // get cached meta data by checking the indexed files
 117             QHash<QUrl, Nepomuk::Variant> variants = file.properties();
 118             QHash<QUrl, Nepomuk::Variant>::const_iterator it = variants.constBegin();
 119             while (it != variants.constEnd()) {
 120                 Nepomuk::Types::Property prop(it.key());
 121                 const QString uriString = prop.uri().toString();
 122                 if (settings.readEntry(uriString, true)) {
 123                     Item item;
 124                     item.name = uriString;
 125                     item.label = nfo.translation(prop.uri());
 126                     item.value = formatValue(it.value());
 127                     m_items.append(item);
 128                 }
 129                 ++it;
 130             }
 131
 132             if (variants.isEmpty()) {
 133                 // the file has not been indexed, query the meta data
 134                 // directly from the file
 135                 KFileMetaInfo metaInfo(m_urls.first());
 136                 const QHash<QString, KFileMetaInfoItem> metaInfoItems = metaInfo.items();
 137                 foreach (const KFileMetaInfoItem& metaInfoItem, metaInfoItems) {
 138                     const QString uriString = metaInfoItem.name();
 139                     if (settings.readEntry(uriString, true)) {
 140                         Item item;
 141                         item.name = uriString;
 142                         item.label = nfo.translation(metaInfoItem.name());
 143                         item.value = metaInfoItem.value().toString();
 144                         m_items.append(item);
 145                     }
 146                 }
 147             }
 148         }
 149
 150         first = false;
 151     }
 152 }
 153
 154 int KLoadMetaDataThread::rating() const
 155 {
 156     return m_rating;
 157 }
 158
 159 QString KLoadMetaDataThread::comment() const
 160 {
 161     return m_comment;
 162 }
 163
 164 QList<Nepomuk::Tag> KLoadMetaDataThread::tags() const
 165 {
 166     return m_tags;
 167 }
 168
 169 QList<KLoadMetaDataThread::Item> KLoadMetaDataThread::items() const
 170 {
 171     return m_items;
 172 }
 173
 174 QMap<KUrl, Nepomuk::Resource> KLoadMetaDataThread::files() const
 175 {
 176     return m_files;
 177 }
 178
 179 void KLoadMetaDataThread::slotFinished()
 180 {
 181     deleteLater();
 182 }
 183
 184 QString  KLoadMetaDataThread::formatValue(const Nepomuk::Variant& value)
 185 {
 186     if (value.isDateTime()) {
 187         return KGlobal::locale()->formatDateTime(value.toDateTime(), KLocale::FancyLongDate);
 188     }
 189
 190     if (value.isResource() || value.isResourceList()) {
 191         QStringList links;
 192         foreach(const Nepomuk::Resource& res, value.toResourceList()) {
 193             if (KProtocolInfo::isKnownProtocol(res.resourceUri())) {
 194                 links << QString::fromLatin1("<a href=\"%1\">%2</a>")
 195                          .arg(KUrl(res.resourceUri()).url())
 196                          .arg(res.genericLabel());
 197             } else {
 198                 links << res.genericLabel();
 199             }
 200         }
 201         return links.join(QLatin1String(";\n"));
 202     }
 203
 204     return value.toString();
 205 }
 206
 207 #include "kloadmetadatathread_p.moc"