src/panels/filter/filterpanel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Sebastian Trueg <trueg@kde.org>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program 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         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "filterpanel.h"
  21
  22 #include "dolphin_searchsettings.h"
  23
  24 #include <nepomuk/filequery.h>
  25 #include <nepomuk/facetwidget.h>
  26 #include <nepomuk/facet.h>
  27 #include <nepomuk/resourcemanager.h>
  28 #include <Nepomuk/Utils/SimpleFacet>
  29 #include <Nepomuk/Utils/ProxyFacet>
  30 #include <Nepomuk/Utils/DynamicResourceFacet>
  31 #include <Nepomuk/Query/FileQuery>
  32 #include <Nepomuk/Query/ResourceTypeTerm>
  33 #include <Nepomuk/Query/LiteralTerm>
  34 #include <Nepomuk/Query/ComparisonTerm>
  35 #include <Nepomuk/Vocabulary/NFO>
  36 #include <Nepomuk/Vocabulary/NMM>
  37 #include <Nepomuk/Vocabulary/NIE>
  38
  39 #include <kfileitem.h>
  40 #include <kio/jobclasses.h>
  41 #include <kio/job.h>
  42
  43 #include <QPushButton>
  44 #include <QShowEvent>
  45 #include <QTreeView>
  46 #include <QVBoxLayout>
  47
  48 FilterPanel::FilterPanel(QWidget* parent) :
  49     Panel(parent),
  50     m_initialized(false),
  51     m_nepomukEnabled(false),
  52     m_lastSetUrlStatJob(0),
  53     m_facetWidget(0),
  54     m_unfacetedRestQuery()
  55 {
  56 }
  57
  58 FilterPanel::~FilterPanel()
  59 {
  60 }
  61
  62 bool FilterPanel::urlChanged()
  63 {
  64     if (isVisible() && m_nepomukEnabled) {
  65         setQuery(Nepomuk::Query::Query());
  66
  67         delete m_lastSetUrlStatJob;
  68
  69         m_lastSetUrlStatJob = KIO::stat(url(), KIO::HideProgressInfo);
  70         connect(m_lastSetUrlStatJob, SIGNAL(result(KJob*)),
  71                 this, SLOT(slotSetUrlStatFinished(KJob*)));
  72     }
  73
  74     return true;
  75 }
  76
  77 void FilterPanel::showEvent(QShowEvent* event)
  78 {
  79     if (event->spontaneous()) {
  80         Panel::showEvent(event);
  81         return;
  82     }
  83
  84     if (!m_initialized) {
  85         QVBoxLayout* layout = new QVBoxLayout(this);
  86         layout->setMargin(0);
  87
  88         Q_ASSERT(m_facetWidget == 0);
  89         m_facetWidget = new Nepomuk::Utils::FacetWidget(this);
  90         layout->addWidget(m_facetWidget, 1);
  91
  92         // File Type
  93         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createFileTypeFacet());
  94
  95         // Image Size
  96         Nepomuk::Utils::ProxyFacet* imageSizeProxy = new Nepomuk::Utils::ProxyFacet();
  97         imageSizeProxy->setFacetCondition(Nepomuk::Query::ResourceTypeTerm(Nepomuk::Vocabulary::NFO::Image()));
  98         Nepomuk::Utils::SimpleFacet* imageSizeFacet = new Nepomuk::Utils::SimpleFacet(imageSizeProxy);
  99         imageSizeFacet->setSelectionMode(Nepomuk::Utils::Facet::MatchAny);
 100         imageSizeFacet->addTerm( i18nc("option:check Refers to a filter on image size", "Small"),
 101                                 Nepomuk::Vocabulary::NFO::width() <= Nepomuk::Query::LiteralTerm(300));
 102         imageSizeFacet->addTerm( i18nc("option:check Refers to a filter on image size", "Medium"),
 103                                 (Nepomuk::Vocabulary::NFO::width() > Nepomuk::Query::LiteralTerm(300)) &&
 104                                 (Nepomuk::Vocabulary::NFO::width() <= Nepomuk::Query::LiteralTerm(800)));
 105         imageSizeFacet->addTerm( i18nc("option:check Refers to a filter on image size", "Large"),
 106                                 Nepomuk::Vocabulary::NFO::width() > Nepomuk::Query::LiteralTerm(800));
 107         imageSizeProxy->setSourceFacet(imageSizeFacet);
 108         m_facetWidget->addFacet(imageSizeProxy);
 109
 110         // Artists
 111         Nepomuk::Utils::ProxyFacet* artistProxy = new Nepomuk::Utils::ProxyFacet();
 112         artistProxy->setFacetCondition(Nepomuk::Query::ResourceTypeTerm(Nepomuk::Vocabulary::NFO::Audio()) ||
 113                                        Nepomuk::Query::ComparisonTerm(Nepomuk::Vocabulary::NIE::mimeType(),
 114                                                                       Nepomuk::Query::LiteralTerm(QLatin1String("audio"))));
 115         Nepomuk::Utils::DynamicResourceFacet* artistFacet = new Nepomuk::Utils::DynamicResourceFacet(artistProxy);
 116         artistFacet->setSelectionMode(Nepomuk::Utils::Facet::MatchAny);
 117         artistFacet->setRelation(Nepomuk::Vocabulary::NMM::performer());
 118         artistProxy->setSourceFacet(artistFacet);
 119         m_facetWidget->addFacet(artistProxy);
 120
 121         // Misc
 122         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createDateFacet());
 123         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createRatingFacet());
 124         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createTagFacet());
 125
 126         Q_ASSERT(m_lastSetUrlStatJob == 0);
 127         m_lastSetUrlStatJob = KIO::stat(url(), KIO::HideProgressInfo);
 128         connect(m_lastSetUrlStatJob, SIGNAL(result(KJob*)),
 129                 this, SLOT(slotSetUrlStatFinished(KJob*)));
 130
 131         connect(m_facetWidget, SIGNAL(queryTermChanged(Nepomuk::Query::Term)),
 132                 this, SLOT(slotQueryTermChanged(Nepomuk::Query::Term)));
 133
 134         m_nepomukEnabled = (Nepomuk::ResourceManager::instance()->init() == 0);
 135         m_facetWidget->setEnabled(m_nepomukEnabled);
 136
 137         m_initialized = true;
 138     }
 139
 140     Panel::showEvent(event);
 141 }
 142
 143 void FilterPanel::slotSetUrlStatFinished(KJob* job)
 144 {
 145     m_lastSetUrlStatJob = 0;
 146
 147     const KIO::UDSEntry uds = static_cast<KIO::StatJob*>(job)->statResult();
 148     const QString nepomukQueryStr = uds.stringValue(KIO::UDSEntry::UDS_NEPOMUK_QUERY);
 149     Nepomuk::Query::FileQuery nepomukQuery;
 150     if (!nepomukQueryStr.isEmpty()) {
 151         nepomukQuery = Nepomuk::Query::Query::fromString(nepomukQueryStr);
 152     } else if (url().isLocalFile()) {
 153         // Fallback query for local file URLs: List all files
 154         Nepomuk::Query::ComparisonTerm compTerm(
 155                                 Nepomuk::Vocabulary::NFO::fileName(),
 156                                 Nepomuk::Query::Term());
 157         nepomukQuery.setFileMode(Nepomuk::Query::FileQuery::QueryFiles);
 158         if (SearchSettings::location() == QLatin1String("FromHere")) {
 159             nepomukQuery.addIncludeFolder(url(), true);
 160         }
 161         nepomukQuery.setTerm(compTerm);
 162     }
 163     setQuery(nepomukQuery);
 164 }
 165
 166 void FilterPanel::slotQueryTermChanged(const Nepomuk::Query::Term& term)
 167 {
 168     Nepomuk::Query::FileQuery query(m_unfacetedRestQuery && term);
 169     emit urlActivated(query.toSearchUrl());
 170 }
 171
 172 void FilterPanel::setQuery(const Nepomuk::Query::Query& query)
 173 {
 174     if (query.isValid()) {
 175         const bool block = m_facetWidget->blockSignals(true);
 176
 177         m_unfacetedRestQuery = m_facetWidget->extractFacetsFromQuery(query);
 178         m_facetWidget->setClientQuery(query);
 179         setEnabled(true);
 180
 181         m_facetWidget->blockSignals(block);
 182     } else {
 183         m_unfacetedRestQuery = Nepomuk::Query::Query();
 184         setEnabled(false);
 185     }
 186 }