src/infosidebarpage.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
   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 "infosidebarpage.h"
  21
  22 #include <config-nepomuk.h>
  23
  24 #include <kdialog.h>
  25 #include <kdirnotify.h>
  26 #include <kfileplacesmodel.h>
  27 #include <klocale.h>
  28 #include <kstandarddirs.h>
  29 #include <kio/previewjob.h>
  30 #include <kfileitem.h>
  31 #include <kglobalsettings.h>
  32 #include <kfilemetainfo.h>
  33 #include <kiconeffect.h>
  34 #include <kseparator.h>
  35 #include <kiconloader.h>
  36
  37 #include <QEvent>
  38 #include <QInputDialog>
  39 #include <QLabel>
  40 #include <QPainter>
  41 #include <QPixmap>
  42 #include <QResizeEvent>
  43 #include <QTimer>
  44 #include <QVBoxLayout>
  45
  46 #include "dolphinsettings.h"
  47 #include "metadatawidget.h"
  48 #include "metatextlabel.h"
  49 #include "pixmapviewer.h"
  50
  51 InfoSidebarPage::InfoSidebarPage(QWidget* parent) :
  52     SidebarPage(parent),
  53     m_initialized(false),
  54     m_pendingPreview(false),
  55     m_shownUrl(),
  56     m_urlCandidate(),
  57     m_fileItem(),
  58     m_selection(),
  59     m_nameLabel(0),
  60     m_preview(0),
  61     m_metaDataWidget(0),
  62     m_metaTextLabel(0)
  63 {
  64 }
  65
  66 InfoSidebarPage::~InfoSidebarPage()
  67 {
  68 }
  69
  70 QSize InfoSidebarPage::sizeHint() const
  71 {
  72     QSize size = SidebarPage::sizeHint();
  73     size.setWidth(minimumSizeHint().width());
  74     return size;
  75 }
  76
  77 void InfoSidebarPage::setUrl(const KUrl& url)
  78 {
  79     SidebarPage::setUrl(url);
  80     if (url.isValid() && !m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash)) {
  81         if (m_initialized) {
  82             cancelRequest();
  83             m_shownUrl = url;
  84             showItemInfo();
  85         } else {
  86             m_shownUrl = url;
  87         }
  88     }
  89 }
  90
  91 void InfoSidebarPage::setSelection(const KFileItemList& selection)
  92 {
  93     if (!m_initialized) {
  94         return;
  95     }
  96
  97     if ((selection.count() == 0) && (m_selection.count() == 0)) {
  98         // The selection has not really changed, only the current index.
  99         // QItemSelectionModel emits a signal in this case and it is less
 100         // expensive doing the check this way instead of patching
 101         // DolphinView::emitSelectionChanged().
 102         return;
 103     }
 104
 105     m_selection = selection;
 106
 107     const int count = selection.count();
 108     if (count == 0) {
 109         m_shownUrl = url();
 110         showItemInfo();
 111     } else {
 112         if ((count == 1) && !selection.first().url().isEmpty()) {
 113             m_urlCandidate = selection.first().url();
 114         }
 115         m_timer->start(TimerDelay);
 116     }
 117 }
 118
 119 void InfoSidebarPage::requestDelayedItemInfo(const KFileItem& item)
 120 {
 121     if (!m_initialized) {
 122         return;
 123     }
 124
 125     cancelRequest();
 126
 127     m_fileItem = KFileItem();
 128     if (item.isNull()) {
 129         // The cursor is above the viewport. If files are selected,
 130         // show information regarding the selection.
 131         if (m_selection.size() > 0) {
 132             m_pendingPreview = false;
 133             m_timer->start(TimerDelay);
 134         }
 135     } else if (!item.url().isEmpty()) {
 136         m_urlCandidate = item.url();
 137         m_fileItem = item;
 138         m_timer->start(TimerDelay);
 139     }
 140 }
 141
 142 void InfoSidebarPage::showEvent(QShowEvent* event)
 143 {
 144     SidebarPage::showEvent(event);
 145     if (!event->spontaneous()) {
 146         if (!m_initialized) {
 147             // do a delayed initialization so that no performance
 148             // penalty is given when Dolphin is started with a closed
 149             // Information Panel
 150             init();
 151         }
 152         showItemInfo();
 153     }
 154 }
 155
 156 void InfoSidebarPage::resizeEvent(QResizeEvent* event)
 157 {
 158     if (m_initialized) {
 159         // If the text inside the name label or the info label cannot
 160         // get wrapped, then the maximum width of the label is increased
 161         // so that the width of the information sidebar gets increased.
 162         // To prevent this, the maximum width is adjusted to
 163         // the current width of the sidebar.
 164         const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
 165         m_nameLabel->setMaximumWidth(maxWidth);
 166
 167         // try to increase the preview as large as possible
 168         m_preview->setSizeHint(QSize(maxWidth, maxWidth));
 169         m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
 170         m_timer->start(TimerDelay);
 171     }
 172
 173     SidebarPage::resizeEvent(event);
 174 }
 175
 176 void InfoSidebarPage::showItemInfo()
 177 {
 178     if (!isVisible()) {
 179         return;
 180     }
 181
 182     cancelRequest();
 183
 184     const KUrl file = (!m_fileItem.isNull() || m_selection.isEmpty()) ? m_shownUrl : m_selection[0].url();
 185     if (!file.isValid()) {
 186         return;
 187     }
 188
 189     const int selectionCount = m_selection.count();
 190     if (m_fileItem.isNull() && (selectionCount > 1)) {
 191         KIconLoader iconLoader;
 192         QPixmap icon = iconLoader.loadIcon("dialog-information",
 193                                            KIconLoader::NoGroup,
 194                                            KIconLoader::SizeEnormous);
 195         m_preview->setPixmap(icon);
 196         m_nameLabel->setText(i18ncp("@info", "%1 item selected", "%1 items selected", selectionCount));
 197     } else if (!applyPlace(file)) {
 198         // try to get a preview pixmap from the item...
 199         KUrl::List list;
 200         list.append(file);
 201
 202         m_pendingPreview = true;
 203
 204         KIconEffect iconEffect;
 205         QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(), KIconLoader::Desktop, KIconLoader::DisabledState);
 206         m_preview->setPixmap(disabledPixmap);
 207
 208         KIO::PreviewJob* job = KIO::filePreview(list,
 209                                                 m_preview->width(),
 210                                                 m_preview->height(),
 211                                                 0,
 212                                                 0,
 213                                                 true,
 214                                                 false);
 215         job->setIgnoreMaximumSize(true);
 216
 217         connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 218                 this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 219         connect(job, SIGNAL(failed(const KFileItem&)),
 220                 this, SLOT(showIcon(const KFileItem&)));
 221
 222         m_nameLabel->setText(file.fileName());
 223     }
 224
 225     showMetaInfo();
 226 }
 227
 228 void InfoSidebarPage::slotTimeout()
 229 {
 230     m_shownUrl = m_urlCandidate;
 231     showItemInfo();
 232 }
 233
 234 void InfoSidebarPage::showIcon(const KFileItem& item)
 235 {
 236     m_pendingPreview = false;
 237     if (!applyPlace(item.url())) {
 238         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 239     }
 240 }
 241
 242 void InfoSidebarPage::showPreview(const KFileItem& item,
 243                                   const QPixmap& pixmap)
 244 {
 245     Q_UNUSED(item);
 246     if (m_pendingPreview) {
 247         m_preview->setPixmap(pixmap);
 248         m_pendingPreview = false;
 249     }
 250 }
 251
 252 void InfoSidebarPage::slotFileRenamed(const QString& source, const QString& dest)
 253 {
 254     if (m_shownUrl == KUrl(source)) {
 255         // the currently shown file has been renamed, hence update the item information
 256         // for the renamed file
 257         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(dest));
 258         requestDelayedItemInfo(item);
 259     }
 260 }
 261
 262 void InfoSidebarPage::slotFilesAdded(const QString& directory)
 263 {
 264     if (m_shownUrl == KUrl(directory)) {
 265         // If the 'trash' icon changes because the trash has been emptied or got filled,
 266         // the signal filesAdded("trash:/") will be emitted.
 267         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 268         requestDelayedItemInfo(item);
 269     }
 270 }
 271
 272 void InfoSidebarPage::slotFilesChanged(const QStringList& files)
 273 {
 274     foreach (const QString& fileName, files) {
 275         if (m_shownUrl == KUrl(fileName)) {
 276             showItemInfo();
 277             break;
 278         }
 279     }
 280 }
 281
 282 void InfoSidebarPage::slotFilesRemoved(const QStringList& files)
 283 {
 284     foreach (const QString& fileName, files) {
 285         if (m_shownUrl == KUrl(fileName)) {
 286             // the currently shown item has been removed, show
 287             // the parent directory as fallback
 288             m_shownUrl = url();
 289             showItemInfo();
 290             break;
 291         }
 292     }
 293 }
 294
 295 void InfoSidebarPage::slotEnteredDirectory(const QString& directory)
 296 {
 297     if (m_shownUrl == KUrl(directory)) {
 298         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 299         requestDelayedItemInfo(item);
 300     }
 301 }
 302
 303 void InfoSidebarPage::slotLeftDirectory(const QString& directory)
 304 {
 305     if (m_shownUrl == KUrl(directory)) {
 306         // The signal 'leftDirectory' is also emitted when a media
 307         // has been unmounted. In this case no directory change will be
 308         // done in Dolphin, but the Information Panel must be updated to
 309         // indicate an invalid directory.
 310         m_shownUrl = url();
 311         showItemInfo();
 312     }
 313 }
 314
 315 bool InfoSidebarPage::applyPlace(const KUrl& url)
 316 {
 317     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 318     int count = placesModel->rowCount();
 319
 320     for (int i = 0; i < count; ++i) {
 321         QModelIndex index = placesModel->index(i, 0);
 322
 323         if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
 324             m_nameLabel->setText(placesModel->text(index));
 325             m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
 326             return true;
 327         }
 328     }
 329
 330     return false;
 331 }
 332
 333 void InfoSidebarPage::cancelRequest()
 334 {
 335     m_timer->stop();
 336 }
 337
 338 void InfoSidebarPage::showMetaInfo()
 339 {
 340     m_metaTextLabel->clear();
 341
 342     const KUrl file = (!m_fileItem.isNull() || m_selection.isEmpty()) ? m_shownUrl : m_selection[0].url();
 343
 344     if ((m_selection.size() <= 1) || !m_fileItem.isNull()) {
 345         KFileItem fileItem(KFileItem::Unknown, KFileItem::Unknown, file);
 346         fileItem.refresh();
 347
 348         if (fileItem.isDir()) {
 349             m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
 350             m_metaTextLabel->add(i18nc("@label", "Modified:"), fileItem.timeString());
 351         } else {
 352             m_metaTextLabel->add(i18nc("@label", "Type:"), fileItem.mimeComment());
 353
 354             m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(fileItem.size()));
 355             m_metaTextLabel->add(i18nc("@label", "Modified:"), fileItem.timeString());
 356
 357             if (fileItem.isLocalFile()) {
 358                 // TODO: See convertMetaInfo below, find a way to display only interesting information
 359                 // in a readable way
 360                 const KFileMetaInfo::WhatFlags flags = KFileMetaInfo::Fastest |
 361                                                        KFileMetaInfo::TechnicalInfo |
 362                                                        KFileMetaInfo::ContentInfo;
 363                 const QString path = fileItem.url().path();
 364                 const KFileMetaInfo fileMetaInfo(path, QString(), flags);
 365                 if (fileMetaInfo.isValid()) {
 366                     const QHash<QString, KFileMetaInfoItem>& items = fileMetaInfo.items();
 367                     QHash<QString, KFileMetaInfoItem>::const_iterator it = items.constBegin();
 368                     const QHash<QString, KFileMetaInfoItem>::const_iterator end = items.constEnd();
 369                     QString labelText;
 370                     while (it != end) {
 371                         const KFileMetaInfoItem& metaInfoItem = it.value();
 372                         const QVariant& value = metaInfoItem.value();
 373                         if (value.isValid() && convertMetaInfo(metaInfoItem.name(), labelText)) {
 374                             m_metaTextLabel->add(labelText, value.toString());
 375                         }
 376                         ++it;
 377                     }
 378                 }
 379             }
 380         }
 381
 382         if (m_metaDataWidget != 0) {
 383             m_metaDataWidget->setFile(fileItem.targetUrl());
 384         }
 385     } else {
 386         if (m_metaDataWidget != 0) {
 387             KUrl::List urls;
 388             foreach (const KFileItem& item, m_selection) {
 389                 urls.append(item.targetUrl());
 390             }
 391             m_metaDataWidget->setFiles(urls);
 392         }
 393
 394         quint64 totalSize = 0;
 395         foreach (const KFileItem& item, m_selection) {
 396             // Only count the size of files, not dirs to match what
 397             // DolphinViewContainer::selectionStatusBarText() does.
 398             if (!item.isDir() && !item.isLink()) {
 399                 totalSize += item.size();
 400             }
 401         }
 402         m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
 403     }
 404 }
 405
 406 bool InfoSidebarPage::convertMetaInfo(const QString& key, QString& text) const
 407 {
 408     // TODO: This code prevents that interesting meta information might be hidden
 409     // and only bypasses the current problem that not all the meta information should
 410     // be shown to the user. Check whether it's possible with Nepomuk to show
 411     // all "user relevant" information in a readable way...
 412
 413     struct MetaKey {
 414         const char* key;
 415         const char* text;
 416     };
 417
 418     // sorted list of keys, where its data should be shown
 419     static const MetaKey keys[] = {
 420         { "audio.album", "Album:" },
 421         { "audio.artist", "Artist:" },
 422         { "audio.title", "Title:" },
 423     };
 424
 425     // do a binary search for the key...
 426     int top = 0;
 427     int bottom = sizeof(keys) / sizeof(MetaKey) - 1;
 428     while (top <= bottom) {
 429         const int middle = (top + bottom) / 2;
 430         const int result = key.compare(keys[middle].key);
 431         if (result < 0) {
 432             bottom = middle - 1;
 433         } else if (result > 0) {
 434             top = middle + 1;
 435         } else {
 436             text = keys[middle].text;
 437             return true;
 438         }
 439     }
 440
 441     return false;
 442 }
 443
 444 void InfoSidebarPage::init()
 445 {
 446     const int spacing = KDialog::spacingHint();
 447
 448     m_timer = new QTimer(this);
 449     m_timer->setSingleShot(true);
 450     connect(m_timer, SIGNAL(timeout()),
 451             this, SLOT(slotTimeout()));
 452
 453     QVBoxLayout* layout = new QVBoxLayout;
 454     layout->setSpacing(spacing);
 455
 456     // name
 457     m_nameLabel = new QLabel(this);
 458     QFont font = m_nameLabel->font();
 459     font.setBold(true);
 460     m_nameLabel->setFont(font);
 461     m_nameLabel->setAlignment(Qt::AlignHCenter);
 462     m_nameLabel->setWordWrap(true);
 463     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 464
 465     // preview
 466     m_preview = new PixmapViewer(this);
 467     m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
 468     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 469
 470     if (MetaDataWidget::metaDataAvailable()) {
 471         // rating, comment and tags
 472         m_metaDataWidget = new MetaDataWidget(this);
 473         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 474     }
 475
 476     // general meta text information
 477     m_metaTextLabel = new MetaTextLabel(this);
 478     m_metaTextLabel->setMinimumWidth(spacing);
 479     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 480
 481     layout->addWidget(m_nameLabel);
 482     layout->addWidget(new KSeparator(this));
 483     layout->addWidget(m_preview);
 484     layout->addWidget(new KSeparator(this));
 485     if (m_metaDataWidget != 0) {
 486         layout->addWidget(m_metaDataWidget);
 487         layout->addWidget(new KSeparator(this));
 488     }
 489     layout->addWidget(m_metaTextLabel);
 490
 491     // ensure that widgets in the information side bar are aligned towards the top
 492     layout->addStretch(1);
 493     setLayout(layout);
 494
 495     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 496                                                                QDBusConnection::sessionBus(), this);
 497     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 498     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 499     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 500     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 501     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 502     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 503
 504     m_initialized = true;
 505 }
 506
 507 #include "infosidebarpage.moc"