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 <nepomuk/filequery.h>
  23 #include <nepomuk/facetwidget.h>
  24 #include <nepomuk/facet.h>
  25 #include <Nepomuk/Query/FileQuery>
  26 #include <Nepomuk/Query/Term>
  27
  28 #include <kfileitem.h>
  29 #include <kio/jobclasses.h>
  30 #include <kio/job.h>
  31
  32 #include <QPushButton>
  33 #include <QShowEvent>
  34 #include <QTreeView>
  35 #include <QVBoxLayout>
  36
  37 FilterPanel::FilterPanel(QWidget* parent) :
  38     Panel(parent),
  39     m_initialized(false),
  40     m_lastSetUrlStatJob(0),
  41     m_removeFolderRestrictionButton(0),
  42     m_facetWidget(0),
  43     m_unfacetedRestQuery()
  44 {
  45 }
  46
  47 FilterPanel::~FilterPanel()
  48 {
  49 }
  50
  51 bool FilterPanel::urlChanged()
  52 {
  53     if (isVisible()) {
  54         setQuery(Nepomuk::Query::Query());
  55
  56         delete m_lastSetUrlStatJob;
  57
  58         m_lastSetUrlStatJob = KIO::stat(url(), KIO::HideProgressInfo);
  59         connect(m_lastSetUrlStatJob, SIGNAL(result(KJob*)),
  60                 this, SLOT(slotSetUrlStatFinished(KJob*)));
  61     }
  62
  63     return true;
  64 }
  65
  66 void FilterPanel::showEvent(QShowEvent* event)
  67 {
  68     if (event->spontaneous()) {
  69         Panel::showEvent(event);
  70         return;
  71     }
  72
  73     if (!m_initialized) {
  74         QVBoxLayout* layout = new QVBoxLayout(this);
  75         Q_ASSERT(m_removeFolderRestrictionButton == 0);
  76         m_removeFolderRestrictionButton = new QPushButton(i18n("Remove folder restriction"), this);
  77         connect(m_removeFolderRestrictionButton, SIGNAL(clicked()), SLOT(slotRemoveFolderRestrictionClicked()));
  78
  79         layout->addWidget(m_removeFolderRestrictionButton);
  80
  81         Q_ASSERT(m_facetWidget == 0);
  82         m_facetWidget = new Nepomuk::Utils::FacetWidget(this);
  83         layout->addWidget(m_facetWidget, 1);
  84
  85         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createFileTypeFacet());
  86         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createDateFacet());
  87         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createRatingFacet());
  88         m_facetWidget->addFacet(Nepomuk::Utils::Facet::createTagFacet());
  89
  90         Q_ASSERT(m_lastSetUrlStatJob == 0);
  91         m_lastSetUrlStatJob = KIO::stat(url(), KIO::HideProgressInfo);
  92         connect(m_lastSetUrlStatJob, SIGNAL(result(KJob*)),
  93                 this, SLOT(slotSetUrlStatFinished(KJob*)));
  94
  95         connect(m_facetWidget, SIGNAL(queryTermChanged(Nepomuk::Query::Term)),
  96                 this, SLOT(slotQueryTermChanged(Nepomuk::Query::Term)));
  97
  98         m_initialized = true;
  99     }
 100
 101     Panel::showEvent(event);
 102 }
 103
 104 void FilterPanel::slotSetUrlStatFinished(KJob* job)
 105 {
 106     m_lastSetUrlStatJob = 0;
 107
 108     const KIO::UDSEntry uds = static_cast<KIO::StatJob*>(job)->statResult();
 109     const QString nepomukQueryStr = uds.stringValue(KIO::UDSEntry::UDS_NEPOMUK_QUERY);
 110     Nepomuk::Query::FileQuery nepomukQuery;
 111     if (!nepomukQueryStr.isEmpty()) {
 112         nepomukQuery = Nepomuk::Query::Query::fromString(nepomukQueryStr);
 113     } else if (url().isLocalFile()) {
 114         // Fallback query for local file URLs
 115         nepomukQuery.addIncludeFolder(url(), false);
 116     }
 117     setQuery(nepomukQuery);
 118 }
 119
 120 void FilterPanel::slotQueryTermChanged(const Nepomuk::Query::Term& term)
 121 {
 122     Nepomuk::Query::Query query(m_unfacetedRestQuery && term);
 123     emit urlActivated(query.toSearchUrl());
 124 }
 125
 126 void FilterPanel::slotRemoveFolderRestrictionClicked()
 127 {
 128     Nepomuk::Query::FileQuery query(m_unfacetedRestQuery && m_facetWidget->queryTerm());
 129     query.setIncludeFolders(KUrl::List());
 130     query.setExcludeFolders(KUrl::List());
 131     m_facetWidget->setClientQuery(query);
 132     emit urlActivated(query.toSearchUrl());
 133 }
 134
 135 void FilterPanel::setQuery(const Nepomuk::Query::Query& query)
 136 {
 137     if (query.isValid()) {
 138         m_removeFolderRestrictionButton->setVisible(query.isFileQuery() && !query.toFileQuery().includeFolders().isEmpty());
 139         m_unfacetedRestQuery = query;
 140         m_unfacetedRestQuery.setTerm(m_facetWidget->extractFacetsFromTerm(query.term()));
 141         m_facetWidget->setClientQuery(query);
 142         setEnabled(true);
 143     } else {
 144         m_unfacetedRestQuery = Nepomuk::Query::Query();
 145         setEnabled(false);
 146     }
 147 }