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 <kconfig.h>
  23 #include <kconfiggroup.h>
  24 #include <kfilemetainfo.h>
  25 #include <kfilemetainfoitem.h>
  26 #include <kglobal.h>
  27 #include <klocale.h>
  28 #include "knfotranslator_p.h"
  29 #include <kprotocolinfo.h>
  30
  31 #include <nepomuk/resource.h>
  32
  33 KLoadMetaDataThread::KLoadMetaDataThread() :
  34     m_rating(0),
  35     m_comment(),
  36     m_tags(),
  37     m_items(),
  38     m_files(),
  39     m_urls(),
  40     m_canceled(false)
  41 {
  42 }
  43
  44 KLoadMetaDataThread::~KLoadMetaDataThread()
  45 {
  46 }
  47
  48 void KLoadMetaDataThread::load(const KUrl::List& urls)
  49 {
  50     m_urls = urls;
  51     m_canceled = false;
  52     start();
  53 }
  54
  55 void KLoadMetaDataThread::cancel()
  56 {
  57     // Setting m_canceled to true will cancel KLoadMetaDataThread::run()
  58     // as soon as run() gets the chance to check m_cancel.
  59     m_canceled = true;
  60 }
  61
  62 void KLoadMetaDataThread::cancelAndDelete()
  63 {
  64     if (isFinished()) {
  65         Q_ASSERT(!isRunning());
  66         deleteLater();
  67     } else {
  68         connect(this, SIGNAL(finished()), this, SLOT(slotFinished()));
  69         // Setting m_canceled to true will cancel KLoadMetaDataThread::run()
  70         // as soon as run() gets the chance to check m_cancel.
  71         m_canceled = true;
  72         // Afterwards the thread will delete itself
  73         // asynchronously inside slotFinished().
  74     }
  75 }
  76
  77 void KLoadMetaDataThread::run()
  78 {
  79     KConfig config("kmetainformationrc", KConfig::NoGlobals);
  80     KConfigGroup settings = config.group("Show");
  81
  82     bool first = true;
  83     foreach (const KUrl& url, m_urls) {
  84         if (m_canceled) {
  85             return;
  86         }
  87
  88         Nepomuk::Resource file(url);
  89         if (!file.isValid()) {
  90             continue;
  91         }
  92
  93         m_files.insert(url, file);
  94
  95         if (!first && (m_rating != file.rating())) {
  96             m_rating = 0; // reset rating
  97         } else if (first) {
  98             m_rating = file.rating();
  99         }
 100
 101         if (!first && (m_comment != file.description())) {
 102             m_comment.clear(); // reset comment
 103         } else if (first) {
 104             m_comment = file.description();
 105         }
 106
 107         if (!first && (m_tags != file.tags())) {
 108             m_tags.clear(); // reset tags
 109         } else if (first) {
 110             m_tags = file.tags();
 111         }
 112
 113         const KNfoTranslator& nfo = KNfoTranslator::instance();
 114         if (first && (m_urls.count() == 1)) {
 115             // get cached meta data by checking the indexed files
 116             QHash<QUrl, Nepomuk::Variant> variants = file.properties();
 117             QHash<QUrl, Nepomuk::Variant>::const_iterator it = variants.constBegin();
 118             while (it != variants.constEnd()) {
 119                 Nepomuk::Types::Property prop(it.key());
 120                 const QString uriString = prop.uri().toString();
 121                 if (settings.readEntry(uriString, true)) {
 122                     Item item;
 123                     item.name = uriString;
 124                     item.label = nfo.translation(prop.uri());
 125                     item.value = formatValue(it.value());
 126                     m_items.append(item);
 127                 }
 128                 ++it;
 129             }
 130
 131             if (variants.isEmpty()) {
 132                 // the file has not been indexed, query the meta data
 133                 // directly from the file
 134                 KFileMetaInfo metaInfo(m_urls.first());
 135                 const QHash<QString, KFileMetaInfoItem> metaInfoItems = metaInfo.items();
 136                 foreach (const KFileMetaInfoItem& metaInfoItem, metaInfoItems) {
 137                     const QString uriString = metaInfoItem.name();
 138                     if (settings.readEntry(uriString, true)) {
 139                         Item item;
 140                         item.name = uriString;
 141                         item.label = nfo.translation(metaInfoItem.name());
 142                         item.value = metaInfoItem.value().toString();
 143                         m_items.append(item);
 144                     }
 145                 }
 146             }
 147         }
 148
 149         first = false;
 150     }
 151 }
 152
 153 int KLoadMetaDataThread::rating() const
 154 {
 155     return m_rating;
 156 }
 157
 158 QString KLoadMetaDataThread::comment() const
 159 {
 160     return m_comment;
 161 }
 162
 163 QList<Nepomuk::Tag> KLoadMetaDataThread::tags() const
 164 {
 165     return m_tags;
 166 }
 167
 168 QList<KLoadMetaDataThread::Item> KLoadMetaDataThread::items() const
 169 {
 170     return m_items;
 171 }
 172
 173 QMap<KUrl, Nepomuk::Resource> KLoadMetaDataThread::files() const
 174 {
 175     return m_files;
 176 }
 177
 178 void KLoadMetaDataThread::slotFinished()
 179 {
 180     deleteLater();
 181 }
 182
 183 QString  KLoadMetaDataThread::formatValue(const Nepomuk::Variant& value)
 184 {
 185     if (value.isDateTime()) {
 186         return KGlobal::locale()->formatDateTime(value.toDateTime(), KLocale::FancyLongDate);
 187     }
 188
 189     if (value.isResource() || value.isResourceList()) {
 190         QStringList links;
 191         foreach(const Nepomuk::Resource& res, value.toResourceList()) {
 192             if (KProtocolInfo::isKnownProtocol(res.resourceUri())) {
 193                 links << QString::fromLatin1("<a href=\"%1\">%2</a>")
 194                          .arg(KUrl(res.resourceUri()).url())
 195                          .arg(res.genericLabel());
 196             } else {
 197                 links << res.genericLabel();
 198             }
 199         }
 200         return links.join(QLatin1String(";\n"));
 201     }
 202
 203     return value.toString();
 204 }
 205
 206 #include "kloadmetadatathread_p.moc"