src/kitemviews/kstandarditemlistwidget.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2012 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "kstandarditemlistwidget.h"
   8
   9 #include "kfileitemlistview.h"
  10 #include "kfileitemmodel.h"
  11 #include "private/kfileitemclipboard.h"
  12 #include "private/kitemlistroleeditor.h"
  13 #include "private/kpixmapmodifier.h"
  14
  15 #include <KIconEffect>
  16 #include <KIconLoader>
  17 #include <KRatingPainter>
  18 #include <KStringHandler>
  19
  20 #include <QApplication>
  21 #include <QGraphicsScene>
  22 #include <QGraphicsSceneResizeEvent>
  23 #include <QGraphicsView>
  24 #include <QGuiApplication>
  25 #include <QPixmapCache>
  26 #include <QStyleOption>
  27
  28 // #define KSTANDARDITEMLISTWIDGET_DEBUG
  29
  30 KStandardItemListWidgetInformant::KStandardItemListWidgetInformant() :
  31     KItemListWidgetInformant()
  32 {
  33 }
  34
  35 KStandardItemListWidgetInformant::~KStandardItemListWidgetInformant()
  36 {
  37 }
  38
  39 void KStandardItemListWidgetInformant::calculateItemSizeHints(QVector<std::pair<qreal, bool>>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
  40 {
  41     switch (static_cast<const KStandardItemListView*>(view)->itemLayout()) {
  42     case KStandardItemListView::IconsLayout:
  43         calculateIconsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  44         break;
  45
  46     case KStandardItemListView::CompactLayout:
  47         calculateCompactLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  48         break;
  49
  50     case KStandardItemListView::DetailsLayout:
  51         calculateDetailsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  52         break;
  53
  54     default:
  55         Q_ASSERT(false);
  56         break;
  57     }
  58 }
  59
  60 qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArray& role,
  61                                                                  int index,
  62                                                                  const KItemListView* view) const
  63 {
  64     const QHash<QByteArray, QVariant> values = view->model()->data(index);
  65     const KItemListStyleOption& option = view->styleOption();
  66
  67     const QString text = roleText(role, values);
  68     qreal width = KStandardItemListWidget::columnPadding(option);
  69
  70     const QFontMetrics& normalFontMetrics = option.fontMetrics;
  71     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
  72
  73     if (role == "rating") {
  74         width += KStandardItemListWidget::preferredRatingSize(option).width();
  75     } else {
  76         // If current item is a link, we use the customized link font metrics instead of the normal font metrics.
  77         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
  78
  79         width += fontMetrics.horizontalAdvance(text);
  80
  81         if (role == "text") {
  82             if (view->supportsItemExpanding()) {
  83                 // Increase the width by the expansion-toggle and the current expansion level
  84                 const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
  85                 const qreal height = option.padding * 2 + qMax(option.iconSize, fontMetrics.height());
  86                 width += (expandedParentsCount + 1) * height;
  87             }
  88
  89             // Increase the width by the required space for the icon
  90             width += option.padding * 2 + option.iconSize;
  91         }
  92     }
  93
  94     return width;
  95 }
  96
  97 QString KStandardItemListWidgetInformant::itemText(int index, const KItemListView* view) const
  98 {
  99     return view->model()->data(index).value("text").toString();
 100 }
 101
 102 bool KStandardItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
 103 {
 104     Q_UNUSED(index)
 105     Q_UNUSED(view)
 106     return false;
 107 }
 108
 109 QString KStandardItemListWidgetInformant::roleText(const QByteArray& role,
 110                                                    const QHash<QByteArray, QVariant>& values) const
 111 {
 112     if (role == "rating") {
 113         // Always use an empty text, as the rating is shown by the image m_rating.
 114         return QString();
 115     }
 116     return values.value(role).toString();
 117 }
 118
 119 QFont KStandardItemListWidgetInformant::customizedFontForLinks(const QFont& baseFont) const
 120 {
 121     return baseFont;
 122 }
 123
 124 void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector<std::pair<qreal, bool>>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 125 {
 126     const KItemListStyleOption& option = view->styleOption();
 127     const QFont& normalFont = option.font;
 128     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 129
 130     const qreal itemWidth = view->itemSize().width();
 131     const qreal maxWidth = itemWidth - 2 * option.padding;
 132     const qreal additionalRolesSpacing = additionalRolesCount * option.fontMetrics.lineSpacing();
 133     const qreal spacingAndIconHeight = option.iconSize + option.padding * 3;
 134
 135     const QFont linkFont = customizedFontForLinks(normalFont);
 136
 137     QTextOption textOption(Qt::AlignHCenter);
 138     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 139
 140     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 141         if (logicalHeightHints.at(index).first > 0.0) {
 142             continue;
 143         }
 144
 145         // If the current item is a link, we use the customized link font instead of the normal font.
 146         const QFont& font = itemIsLink(index, view) ? linkFont : normalFont;
 147
 148         const QString& text = KStringHandler::preProcessWrap(itemText(index, view));
 149
 150         // Calculate the number of lines required for wrapping the name
 151         qreal textHeight = 0;
 152         QTextLayout layout(text, font);
 153         layout.setTextOption(textOption);
 154         layout.beginLayout();
 155         QTextLine line;
 156         int lineCount = 0;
 157         bool isElided = false;
 158         while ((line = layout.createLine()).isValid()) {
 159             line.setLineWidth(maxWidth);
 160             line.naturalTextWidth();
 161             textHeight += line.height();
 162
 163             ++lineCount;
 164             if (lineCount == option.maxTextLines) {
 165                 isElided = layout.createLine().isValid();
 166                 break;
 167             }
 168         }
 169         layout.endLayout();
 170
 171         // Add one line for each additional information
 172         textHeight += additionalRolesSpacing;
 173
 174         logicalHeightHints[index].first = textHeight + spacingAndIconHeight;
 175         logicalHeightHints[index].second = isElided;
 176     }
 177
 178     logicalWidthHint = itemWidth;
 179 }
 180
 181 void KStandardItemListWidgetInformant::calculateCompactLayoutItemSizeHints(QVector<std::pair<qreal, bool>>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 182 {
 183     const KItemListStyleOption& option = view->styleOption();
 184     const QFontMetrics& normalFontMetrics = option.fontMetrics;
 185     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 186
 187     const QList<QByteArray>& visibleRoles = view->visibleRoles();
 188     const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
 189     const qreal maxWidth = option.maxTextWidth;
 190     const qreal paddingAndIconWidth = option.padding * 4 + option.iconSize;
 191     const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * normalFontMetrics.lineSpacing());
 192
 193     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
 194
 195     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 196         if (logicalHeightHints.at(index).first > 0.0) {
 197             continue;
 198         }
 199
 200         // If the current item is a link, we use the customized link font metrics instead of the normal font metrics.
 201         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
 202
 203         // For each row exactly one role is shown. Calculate the maximum required width that is necessary
 204         // to show all roles without horizontal clipping.
 205         qreal maximumRequiredWidth = 0.0;
 206
 207         if (showOnlyTextRole) {
 208             maximumRequiredWidth = fontMetrics.horizontalAdvance(itemText(index, view));
 209         } else {
 210             const QHash<QByteArray, QVariant>& values = view->model()->data(index);
 211             for (const QByteArray& role : visibleRoles) {
 212                 const QString& text = roleText(role, values);
 213                 const qreal requiredWidth = fontMetrics.horizontalAdvance(text);
 214                 maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
 215             }
 216         }
 217
 218         qreal width = paddingAndIconWidth + maximumRequiredWidth;
 219         if (maxWidth > 0 && width > maxWidth) {
 220             width = maxWidth;
 221         }
 222
 223         logicalHeightHints[index].first = width;
 224     }
 225
 226     logicalWidthHint = height;
 227 }
 228
 229 void KStandardItemListWidgetInformant::calculateDetailsLayoutItemSizeHints(QVector<std::pair<qreal, bool>>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 230 {
 231     const KItemListStyleOption& option = view->styleOption();
 232     const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
 233     logicalHeightHints.fill(std::make_pair(height, false));
 234     logicalWidthHint = -1.0;
 235 }
 236
 237 KStandardItemListWidget::KStandardItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
 238     KItemListWidget(informant, parent),
 239     m_textInfo(),
 240     m_isCut(false),
 241     m_isHidden(false),
 242     m_customizedFont(),
 243     m_customizedFontMetrics(m_customizedFont),
 244     m_isExpandable(false),
 245     m_supportsItemExpanding(false),
 246     m_dirtyLayout(true),
 247     m_dirtyContent(true),
 248     m_dirtyContentRoles(),
 249     m_layout(IconsLayout),
 250     m_pixmapPos(),
 251     m_pixmap(),
 252     m_scaledPixmapSize(),
 253     m_columnWidthSum(),
 254     m_iconRect(),
 255     m_hoverPixmap(),
 256     m_textRect(),
 257     m_sortedVisibleRoles(),
 258     m_expansionArea(),
 259     m_customTextColor(),
 260     m_additionalInfoTextColor(),
 261     m_overlay(),
 262     m_rating(),
 263     m_roleEditor(nullptr),
 264     m_oldRoleEditor(nullptr)
 265 {
 266 }
 267
 268 KStandardItemListWidget::~KStandardItemListWidget()
 269 {
 270     qDeleteAll(m_textInfo);
 271     m_textInfo.clear();
 272
 273     if (m_roleEditor) {
 274         m_roleEditor->deleteLater();
 275     }
 276
 277     if (m_oldRoleEditor) {
 278         m_oldRoleEditor->deleteLater();
 279     }
 280 }
 281
 282 void KStandardItemListWidget::setLayout(Layout layout)
 283 {
 284     if (m_layout != layout) {
 285         m_layout = layout;
 286         m_dirtyLayout = true;
 287         updateAdditionalInfoTextColor();
 288         update();
 289     }
 290 }
 291
 292 KStandardItemListWidget::Layout KStandardItemListWidget::layout() const
 293 {
 294     return m_layout;
 295 }
 296
 297 void KStandardItemListWidget::setHighlightEntireRow(bool highlightEntireRow) {
 298     if (m_highlightEntireRow != highlightEntireRow) {
 299         m_highlightEntireRow = highlightEntireRow;
 300         m_dirtyLayout = true;
 301         update();
 302     }
 303 }
 304
 305 bool KStandardItemListWidget::highlightEntireRow() const {
 306     return m_highlightEntireRow;
 307 }
 308
 309 void KStandardItemListWidget::setSupportsItemExpanding(bool supportsItemExpanding)
 310 {
 311     if (m_supportsItemExpanding != supportsItemExpanding) {
 312         m_supportsItemExpanding = supportsItemExpanding;
 313         m_dirtyLayout = true;
 314         update();
 315     }
 316 }
 317
 318 bool KStandardItemListWidget::supportsItemExpanding() const
 319 {
 320     return m_supportsItemExpanding;
 321 }
 322
 323 void KStandardItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 324 {
 325     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 326
 327     KItemListWidget::paint(painter, option, widget);
 328
 329     if (!m_expansionArea.isEmpty()) {
 330         drawSiblingsInformation(painter);
 331     }
 332
 333     const KItemListStyleOption& itemListStyleOption = styleOption();
 334     if (isHovered() && !m_pixmap.isNull()) {
 335         if (hoverOpacity() < 1.0) {
 336             /*
 337              * Linear interpolation between m_pixmap and m_hoverPixmap.
 338              *
 339              * Note that this cannot be achieved by painting m_hoverPixmap over
 340              * m_pixmap, even if the opacities are adjusted. For details see
 341              * https://git.reviewboard.kde.org/r/109614/
 342              */
 343             // Paint pixmap1 so that pixmap1 = m_pixmap * (1.0 - hoverOpacity())
 344             QPixmap pixmap1(m_pixmap.size());
 345             pixmap1.setDevicePixelRatio(m_pixmap.devicePixelRatio());
 346             pixmap1.fill(Qt::transparent);
 347             {
 348                 QPainter p(&pixmap1);
 349                 p.setOpacity(1.0 - hoverOpacity());
 350                 p.drawPixmap(0, 0, m_pixmap);
 351             }
 352
 353             // Paint pixmap2 so that pixmap2 = m_hoverPixmap * hoverOpacity()
 354             QPixmap pixmap2(pixmap1.size());
 355             pixmap2.setDevicePixelRatio(pixmap1.devicePixelRatio());
 356             pixmap2.fill(Qt::transparent);
 357             {
 358                 QPainter p(&pixmap2);
 359                 p.setOpacity(hoverOpacity());
 360                 p.drawPixmap(0, 0, m_hoverPixmap);
 361             }
 362
 363             // Paint pixmap2 on pixmap1 using CompositionMode_Plus
 364             // Now pixmap1 = pixmap2 + m_pixmap * (1.0 - hoverOpacity())
 365             //             = m_hoverPixmap * hoverOpacity() + m_pixmap * (1.0 - hoverOpacity())
 366             {
 367                 QPainter p(&pixmap1);
 368                 p.setCompositionMode(QPainter::CompositionMode_Plus);
 369                 p.drawPixmap(0, 0, pixmap2);
 370             }
 371
 372             // Finally paint pixmap1 on the widget
 373             drawPixmap(painter, pixmap1);
 374         } else {
 375             drawPixmap(painter, m_hoverPixmap);
 376         }
 377     } else if (!m_pixmap.isNull()) {
 378         drawPixmap(painter, m_pixmap);
 379     }
 380
 381     painter->setFont(m_customizedFont);
 382     painter->setPen(textColor());
 383     const TextInfo* textInfo = m_textInfo.value("text");
 384
 385     if (!textInfo) {
 386         // It seems that we can end up here even if m_textInfo does not contain
 387         // the key "text", see bug 306167. According to triggerCacheRefreshing(),
 388         // this can only happen if the index is negative. This can happen when
 389         // the item is about to be removed, see KItemListView::slotItemsRemoved().
 390         // TODO: try to reproduce the crash and find a better fix.
 391         return;
 392     }
 393
 394     painter->drawStaticText(textInfo->pos, textInfo->staticText);
 395
 396     bool clipAdditionalInfoBounds = false;
 397     if (m_supportsItemExpanding) {
 398         // Prevent a possible overlapping of the additional-information texts
 399         // with the icon. This can happen if the user has minimized the width
 400         // of the name-column to a very small value.
 401         const qreal minX = m_pixmapPos.x() + m_pixmap.width() + 4 * itemListStyleOption.padding;
 402         if (textInfo->pos.x() + columnWidth("text") > minX) {
 403             clipAdditionalInfoBounds = true;
 404             painter->save();
 405             painter->setClipRect(minX, 0, size().width() - minX, size().height(), Qt::IntersectClip);
 406         }
 407     }
 408
 409     painter->setPen(m_additionalInfoTextColor);
 410     painter->setFont(m_customizedFont);
 411
 412     for (int i = 1; i < m_sortedVisibleRoles.count(); ++i) {
 413         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles[i]);
 414         painter->drawStaticText(textInfo->pos, textInfo->staticText);
 415     }
 416
 417     if (!m_rating.isNull()) {
 418         const TextInfo* ratingTextInfo = m_textInfo.value("rating");
 419         QPointF pos = ratingTextInfo->pos;
 420         const Qt::Alignment align = ratingTextInfo->staticText.textOption().alignment();
 421         if (align & Qt::AlignHCenter) {
 422             pos.rx() += (size().width() - m_rating.width() / m_rating.devicePixelRatioF()) / 2 - 2;
 423         }
 424         painter->drawPixmap(pos, m_rating);
 425     }
 426
 427     if (clipAdditionalInfoBounds) {
 428         painter->restore();
 429     }
 430
 431 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
 432     painter->setBrush(Qt::NoBrush);
 433     painter->setPen(Qt::green);
 434     painter->drawRect(m_iconRect);
 435
 436     painter->setPen(Qt::blue);
 437     painter->drawRect(m_textRect);
 438
 439     painter->setPen(Qt::red);
 440     painter->drawText(QPointF(0, m_customizedFontMetrics.height()), QString::number(index()));
 441     painter->drawRect(rect());
 442 #endif
 443 }
 444
 445 QRectF KStandardItemListWidget::iconRect() const
 446 {
 447     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 448     return m_iconRect;
 449 }
 450
 451 QRectF KStandardItemListWidget::textRect() const
 452 {
 453     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 454     return m_textRect;
 455 }
 456
 457 QRectF KStandardItemListWidget::textFocusRect() const
 458 {
 459     // In the compact- and details-layout a larger textRect() is returned to be aligned
 460     // with the iconRect(). This is useful to have a larger selection/hover-area
 461     // when having a quite large icon size but only one line of text. Still the
 462     // focus rectangle should be shown as narrow as possible around the text.
 463
 464     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 465
 466     switch (m_layout) {
 467     case CompactLayout: {
 468         QRectF rect = m_textRect;
 469         const TextInfo* topText    = m_textInfo.value(m_sortedVisibleRoles.first());
 470         const TextInfo* bottomText = m_textInfo.value(m_sortedVisibleRoles.last());
 471         rect.setTop(topText->pos.y());
 472         rect.setBottom(bottomText->pos.y() + bottomText->staticText.size().height());
 473         return rect;
 474     }
 475
 476     case DetailsLayout: {
 477         QRectF rect = m_textRect;
 478         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles.first());
 479         rect.setTop(textInfo->pos.y());
 480         rect.setBottom(textInfo->pos.y() + textInfo->staticText.size().height());
 481
 482         const KItemListStyleOption& option = styleOption();
 483         if (option.extendedSelectionRegion) {
 484             const QString text = textInfo->staticText.text();
 485             rect.setWidth(m_customizedFontMetrics.horizontalAdvance(text) + 2 * option.padding);
 486         }
 487
 488         return rect;
 489     }
 490
 491     default:
 492         break;
 493     }
 494
 495     return m_textRect;
 496 }
 497
 498 QRectF KStandardItemListWidget::selectionRect() const
 499 {
 500     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 501
 502     switch (m_layout) {
 503     case IconsLayout:
 504         return m_textRect;
 505
 506     case CompactLayout:
 507     case DetailsLayout: {
 508         const int padding = styleOption().padding;
 509         QRectF adjustedIconRect = iconRect().adjusted(-padding, -padding, padding, padding);
 510         QRectF result = adjustedIconRect | m_textRect;
 511         if (m_highlightEntireRow) {
 512             result.setRight(m_columnWidthSum + sidePadding());
 513         }
 514         return result;
 515     }
 516
 517     default:
 518         Q_ASSERT(false);
 519         break;
 520     }
 521
 522     return m_textRect;
 523 }
 524
 525 QRectF KStandardItemListWidget::expansionToggleRect() const
 526 {
 527     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 528     return m_isExpandable ? m_expansionArea : QRectF();
 529 }
 530
 531 QRectF KStandardItemListWidget::selectionToggleRect() const
 532 {
 533     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 534
 535     const int widgetIconSize = iconSize();
 536     int toggleSize = KIconLoader::SizeSmall;
 537     if (widgetIconSize >= KIconLoader::SizeEnormous) {
 538         toggleSize = KIconLoader::SizeMedium;
 539     } else if (widgetIconSize >= KIconLoader::SizeLarge) {
 540         toggleSize = KIconLoader::SizeSmallMedium;
 541     }
 542
 543     QPointF pos = iconRect().topLeft();
 544
 545     // If the selection toggle has a very small distance to the
 546     // widget borders, the size of the selection toggle will get
 547     // increased to prevent an accidental clicking of the item
 548     // when trying to hit the toggle.
 549     const int widgetHeight = size().height();
 550     const int widgetWidth = size().width();
 551     const int minMargin = 2;
 552
 553     if (toggleSize + minMargin * 2 >= widgetHeight) {
 554         pos.rx() -= (widgetHeight - toggleSize) / 2;
 555         toggleSize = widgetHeight;
 556         pos.setY(0);
 557     }
 558     if (toggleSize + minMargin * 2 >= widgetWidth) {
 559         pos.ry() -= (widgetWidth - toggleSize) / 2;
 560         toggleSize = widgetWidth;
 561         pos.setX(0);
 562     }
 563
 564     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 565 }
 566
 567 QPixmap KStandardItemListWidget::createDragPixmap(const QStyleOptionGraphicsItem* option,
 568                                                   QWidget* widget)
 569 {
 570     QPixmap pixmap = KItemListWidget::createDragPixmap(option, widget);
 571     if (m_layout != DetailsLayout) {
 572         return pixmap;
 573     }
 574
 575     // Only return the content of the text-column as pixmap
 576     const int leftClip = m_pixmapPos.x();
 577
 578     const TextInfo* textInfo = m_textInfo.value("text");
 579     const int rightClip = textInfo->pos.x() +
 580                           textInfo->staticText.size().width() +
 581                           2 * styleOption().padding;
 582
 583     QPixmap clippedPixmap(rightClip - leftClip + 1, pixmap.height());
 584     clippedPixmap.fill(Qt::transparent);
 585
 586     QPainter painter(&clippedPixmap);
 587     painter.drawPixmap(-leftClip, 0, pixmap);
 588
 589     return clippedPixmap;
 590 }
 591
 592
 593 KItemListWidgetInformant* KStandardItemListWidget::createInformant()
 594 {
 595     return new KStandardItemListWidgetInformant();
 596 }
 597
 598 void KStandardItemListWidget::invalidateCache()
 599 {
 600     m_dirtyLayout = true;
 601     m_dirtyContent = true;
 602 }
 603
 604 void KStandardItemListWidget::invalidateIconCache()
 605 {
 606     m_dirtyContent = true;
 607     m_dirtyContentRoles.insert("iconPixmap");
 608     m_dirtyContentRoles.insert("iconOverlays");
 609 }
 610
 611 void KStandardItemListWidget::refreshCache()
 612 {
 613 }
 614
 615 bool KStandardItemListWidget::isRoleRightAligned(const QByteArray& role) const
 616 {
 617     Q_UNUSED(role)
 618     return false;
 619 }
 620
 621 bool KStandardItemListWidget::isHidden() const
 622 {
 623     return false;
 624 }
 625
 626 QFont KStandardItemListWidget::customizedFont(const QFont& baseFont) const
 627 {
 628     return baseFont;
 629 }
 630
 631 QPalette::ColorRole KStandardItemListWidget::normalTextColorRole() const
 632 {
 633     return QPalette::Text;
 634 }
 635
 636 void KStandardItemListWidget::setTextColor(const QColor& color)
 637 {
 638     if (color != m_customTextColor) {
 639         m_customTextColor = color;
 640         updateAdditionalInfoTextColor();
 641         update();
 642     }
 643 }
 644
 645 QColor KStandardItemListWidget::textColor() const
 646 {
 647     if (!isSelected()) {
 648         if (m_isHidden) {
 649             return m_additionalInfoTextColor;
 650         } else if (m_customTextColor.isValid()) {
 651             return m_customTextColor;
 652         }
 653     }
 654
 655     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 656     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : normalTextColorRole();
 657     return styleOption().palette.color(group, role);
 658 }
 659
 660 void KStandardItemListWidget::setOverlay(const QPixmap& overlay)
 661 {
 662     m_overlay = overlay;
 663     m_dirtyContent = true;
 664     update();
 665 }
 666
 667 QPixmap KStandardItemListWidget::overlay() const
 668 {
 669     return m_overlay;
 670 }
 671
 672
 673 QString KStandardItemListWidget::roleText(const QByteArray& role,
 674                                           const QHash<QByteArray, QVariant>& values) const
 675 {
 676     return static_cast<const KStandardItemListWidgetInformant*>(informant())->roleText(role, values);
 677 }
 678
 679 void KStandardItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 680                                           const QSet<QByteArray>& roles)
 681 {
 682     Q_UNUSED(current)
 683
 684     m_dirtyContent = true;
 685
 686     QSet<QByteArray> dirtyRoles;
 687     if (roles.isEmpty()) {
 688         const auto visibleRoles = this->visibleRoles();
 689         dirtyRoles = QSet<QByteArray>(visibleRoles.constBegin(), visibleRoles.constEnd());
 690     } else {
 691         dirtyRoles = roles;
 692     }
 693
 694     // The URL might have changed (i.e., if the sort order of the items has
 695     // been changed). Therefore, the "is cut" state must be updated.
 696     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 697     const QUrl itemUrl = data().value("url").toUrl();
 698     m_isCut = clipboard->isCut(itemUrl);
 699
 700     // The icon-state might depend from other roles and hence is
 701     // marked as dirty whenever a role has been changed
 702     dirtyRoles.insert("iconPixmap");
 703     dirtyRoles.insert("iconName");
 704
 705     QSetIterator<QByteArray> it(dirtyRoles);
 706     while (it.hasNext()) {
 707         const QByteArray& role = it.next();
 708         m_dirtyContentRoles.insert(role);
 709     }
 710 }
 711
 712 void KStandardItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 713                                               const QList<QByteArray>& previous)
 714 {
 715     Q_UNUSED(previous)
 716     m_sortedVisibleRoles = current;
 717     m_dirtyLayout = true;
 718 }
 719
 720 void KStandardItemListWidget::columnWidthChanged(const QByteArray& role,
 721                                              qreal current,
 722                                              qreal previous)
 723 {
 724     Q_UNUSED(role)
 725     Q_UNUSED(current)
 726     Q_UNUSED(previous)
 727     m_dirtyLayout = true;
 728 }
 729
 730 void KStandardItemListWidget::sidePaddingChanged(qreal padding) {
 731     Q_UNUSED(padding)
 732     m_dirtyLayout = true;
 733 }
 734
 735 void KStandardItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 736                                              const KItemListStyleOption& previous)
 737 {
 738     KItemListWidget::styleOptionChanged(current, previous);
 739
 740     updateAdditionalInfoTextColor();
 741     m_dirtyLayout = true;
 742 }
 743
 744 void KStandardItemListWidget::hoveredChanged(bool hovered)
 745 {
 746     Q_UNUSED(hovered)
 747     m_dirtyLayout = true;
 748 }
 749
 750 void KStandardItemListWidget::selectedChanged(bool selected)
 751 {
 752     Q_UNUSED(selected)
 753     updateAdditionalInfoTextColor();
 754     m_dirtyContent = true;
 755 }
 756
 757 void KStandardItemListWidget::siblingsInformationChanged(const QBitArray& current, const QBitArray& previous)
 758 {
 759     Q_UNUSED(current)
 760     Q_UNUSED(previous)
 761     m_dirtyLayout = true;
 762 }
 763
 764 int KStandardItemListWidget::selectionLength(const QString& text) const
 765 {
 766     return text.length();
 767 }
 768
 769 void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const QByteArray& previous)
 770 {
 771     Q_UNUSED(previous)
 772
 773     QGraphicsView* parent = scene()->views()[0];
 774     if (current.isEmpty() || !parent || current != "text") {
 775         if (m_roleEditor) {
 776             Q_EMIT roleEditingCanceled(index(), current, data().value(current));
 777
 778             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 779                        this, &KStandardItemListWidget::slotRoleEditingCanceled);
 780             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 781                        this, &KStandardItemListWidget::slotRoleEditingFinished);
 782
 783             if (m_oldRoleEditor) {
 784                 m_oldRoleEditor->deleteLater();
 785             }
 786             m_oldRoleEditor = m_roleEditor;
 787             m_roleEditor->hide();
 788             m_roleEditor = nullptr;
 789         }
 790         return;
 791     }
 792
 793     Q_ASSERT(!m_roleEditor);
 794
 795     const TextInfo* textInfo = m_textInfo.value("text");
 796
 797     m_roleEditor = new KItemListRoleEditor(parent);
 798     m_roleEditor->setRole(current);
 799     m_roleEditor->setAllowUpDownKeyChainEdit(m_layout != IconsLayout);
 800     m_roleEditor->setFont(styleOption().font);
 801
 802     const QString text = data().value(current).toString();
 803     m_roleEditor->setPlainText(text);
 804
 805     QTextOption textOption = textInfo->staticText.textOption();
 806     m_roleEditor->document()->setDefaultTextOption(textOption);
 807
 808     const int textSelectionLength = selectionLength(text);
 809
 810     if (textSelectionLength > 0) {
 811         QTextCursor cursor = m_roleEditor->textCursor();
 812         cursor.movePosition(QTextCursor::StartOfBlock);
 813         cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, textSelectionLength);
 814         m_roleEditor->setTextCursor(cursor);
 815     }
 816
 817     connect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 818             this, &KStandardItemListWidget::slotRoleEditingCanceled);
 819     connect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 820             this, &KStandardItemListWidget::slotRoleEditingFinished);
 821
 822     // Adjust the geometry of the editor
 823     QRectF rect = roleEditingRect(current);
 824     const int frameWidth = m_roleEditor->frameWidth();
 825     rect.adjust(-frameWidth, -frameWidth, frameWidth, frameWidth);
 826     rect.translate(pos());
 827     if (rect.right() > parent->width()) {
 828         rect.setWidth(parent->width() - rect.left());
 829     }
 830     m_roleEditor->setGeometry(rect.toRect());
 831     m_roleEditor->show();
 832     m_roleEditor->setFocus();
 833 }
 834
 835 void KStandardItemListWidget::iconSizeChanged(int current, int previous)
 836 {
 837     KItemListWidget::iconSizeChanged(current, previous);
 838
 839     invalidateIconCache();
 840     triggerCacheRefreshing();
 841     update();
 842 }
 843
 844 void KStandardItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 845 {
 846     if (m_roleEditor) {
 847         setEditedRole(QByteArray());
 848         Q_ASSERT(!m_roleEditor);
 849     }
 850
 851     KItemListWidget::resizeEvent(event);
 852
 853     m_dirtyLayout = true;
 854 }
 855
 856 void KStandardItemListWidget::showEvent(QShowEvent* event)
 857 {
 858     KItemListWidget::showEvent(event);
 859
 860     // Listen to changes of the clipboard to mark the item as cut/uncut
 861     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 862
 863     const QUrl itemUrl = data().value("url").toUrl();
 864     m_isCut = clipboard->isCut(itemUrl);
 865
 866     connect(clipboard, &KFileItemClipboard::cutItemsChanged,
 867             this, &KStandardItemListWidget::slotCutItemsChanged);
 868 }
 869
 870 void KStandardItemListWidget::hideEvent(QHideEvent* event)
 871 {
 872     disconnect(KFileItemClipboard::instance(), &KFileItemClipboard::cutItemsChanged,
 873                this, &KStandardItemListWidget::slotCutItemsChanged);
 874
 875     KItemListWidget::hideEvent(event);
 876 }
 877
 878 bool KStandardItemListWidget::event(QEvent *event)
 879 {
 880     if (event->type() == QEvent::WindowDeactivate || event->type() == QEvent::WindowActivate
 881             || event->type() == QEvent::PaletteChange) {
 882         m_dirtyContent = true;
 883     }
 884
 885     return KItemListWidget::event(event);
 886 }
 887
 888 void KStandardItemListWidget::finishRoleEditing()
 889 {
 890     if (!editedRole().isEmpty() && m_roleEditor) {
 891         slotRoleEditingFinished(editedRole(), KIO::encodeFileName(m_roleEditor->toPlainText()));
 892     }
 893 }
 894
 895 void KStandardItemListWidget::slotCutItemsChanged()
 896 {
 897     const QUrl itemUrl = data().value("url").toUrl();
 898     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 899     if (m_isCut != isCut) {
 900         m_isCut = isCut;
 901         m_pixmap = QPixmap();
 902         m_dirtyContent = true;
 903         update();
 904     }
 905 }
 906
 907 void KStandardItemListWidget::slotRoleEditingCanceled(const QByteArray& role,
 908                                                       const QVariant& value)
 909 {
 910     closeRoleEditor();
 911     Q_EMIT roleEditingCanceled(index(), role, value);
 912     setEditedRole(QByteArray());
 913 }
 914
 915 void KStandardItemListWidget::slotRoleEditingFinished(const QByteArray& role,
 916                                                       const QVariant& value)
 917 {
 918     closeRoleEditor();
 919     Q_EMIT roleEditingFinished(index(), role, value);
 920     setEditedRole(QByteArray());
 921 }
 922
 923 void KStandardItemListWidget::triggerCacheRefreshing()
 924 {
 925     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 926         return;
 927     }
 928
 929     refreshCache();
 930
 931     const QHash<QByteArray, QVariant> values = data();
 932     m_isExpandable = m_supportsItemExpanding && values["isExpandable"].toBool();
 933     m_isHidden = isHidden();
 934     m_customizedFont = customizedFont(styleOption().font);
 935     m_customizedFontMetrics = QFontMetrics(m_customizedFont);
 936     m_columnWidthSum = std::accumulate(m_sortedVisibleRoles.begin(), m_sortedVisibleRoles.end(),
 937                                        qreal(), [this](qreal sum, const auto &role){ return sum + columnWidth(role); });
 938
 939     updateExpansionArea();
 940     updateTextsCache();
 941     updatePixmapCache();
 942     clearHoverCache();
 943
 944     m_dirtyLayout = false;
 945     m_dirtyContent = false;
 946     m_dirtyContentRoles.clear();
 947 }
 948
 949 void KStandardItemListWidget::updateExpansionArea()
 950 {
 951     if (m_supportsItemExpanding) {
 952         const QHash<QByteArray, QVariant> values = data();
 953         const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 954         if (expandedParentsCount >= 0) {
 955             const int widgetIconSize = iconSize();
 956             const qreal widgetHeight = size().height();
 957             const qreal inc = (widgetHeight - widgetIconSize) / 2;
 958             const qreal x = expandedParentsCount * widgetHeight + inc;
 959             const qreal y = inc;
 960             const qreal xPadding = m_highlightEntireRow ? sidePadding() : 0;
 961             m_expansionArea = QRectF(xPadding + x, y, widgetIconSize, widgetIconSize);
 962             return;
 963         }
 964     }
 965
 966     m_expansionArea = QRectF();
 967 }
 968
 969 void KStandardItemListWidget::updatePixmapCache()
 970 {
 971     // Precondition: Requires already updated m_textPos values to calculate
 972     // the remaining height when the alignment is vertical.
 973
 974     const QSizeF widgetSize = size();
 975     const bool iconOnTop = (m_layout == IconsLayout);
 976     const KItemListStyleOption& option = styleOption();
 977     const qreal padding = option.padding;
 978
 979     const int widgetIconSize = iconSize();
 980     const int maxIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : widgetIconSize;
 981     const int maxIconHeight = widgetIconSize;
 982
 983     const QHash<QByteArray, QVariant> values = data();
 984
 985     bool updatePixmap = (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight);
 986     if (!updatePixmap && m_dirtyContent) {
 987         updatePixmap = m_dirtyContentRoles.isEmpty()
 988                        || m_dirtyContentRoles.contains("iconPixmap")
 989                        || m_dirtyContentRoles.contains("iconName")
 990                        || m_dirtyContentRoles.contains("iconOverlays");
 991     }
 992
 993     if (updatePixmap) {
 994         m_pixmap = QPixmap();
 995
 996         int sequenceIndex = hoverSequenceIndex();
 997
 998         if (values.contains("hoverSequencePixmaps")) {
 999             // Use one of the hover sequence pixmaps instead of the default
1000             // icon pixmap.
1001
1002             const QVector<QPixmap> pixmaps = values["hoverSequencePixmaps"].value<QVector<QPixmap>>();
1003
1004             if (values.contains("hoverSequenceWraparoundPoint")) {
1005                 const float wap = values["hoverSequenceWraparoundPoint"].toFloat();
1006                 if (wap >= 1.0f) {
1007                     sequenceIndex %= static_cast<int>(wap);
1008                 }
1009             }
1010
1011             const int loadedIndex = qMax(qMin(sequenceIndex, pixmaps.size()-1), 0);
1012
1013             if (loadedIndex != 0) {
1014                 m_pixmap = pixmaps[loadedIndex];
1015             }
1016         }
1017
1018         if (m_pixmap.isNull()) {
1019             m_pixmap = values["iconPixmap"].value<QPixmap>();
1020         }
1021
1022         if (m_pixmap.isNull()) {
1023             // Use the icon that fits to the MIME-type
1024             QString iconName = values["iconName"].toString();
1025             if (iconName.isEmpty()) {
1026                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
1027                 // use a generic icon as fallback
1028                 iconName = QStringLiteral("unknown");
1029             }
1030             const QStringList overlays = values["iconOverlays"].toStringList();
1031             m_pixmap = pixmapForIcon(iconName, overlays, maxIconHeight, m_layout != IconsLayout && isActiveWindow() && isSelected() ? QIcon::Selected : QIcon::Normal);
1032
1033         } else if (m_pixmap.width() / m_pixmap.devicePixelRatio() != maxIconWidth || m_pixmap.height() / m_pixmap.devicePixelRatio() != maxIconHeight) {
1034             // A custom pixmap has been applied. Assure that the pixmap
1035             // is scaled to the maximum available size.
1036             KPixmapModifier::scale(m_pixmap, QSize(maxIconWidth, maxIconHeight) * qApp->devicePixelRatio());
1037         }
1038
1039         if (m_pixmap.isNull()) {
1040             m_hoverPixmap = QPixmap();
1041             return;
1042         }
1043
1044         if (m_isCut) {
1045             KIconEffect* effect = KIconLoader::global()->iconEffect();
1046             m_pixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
1047         }
1048
1049         if (m_isHidden) {
1050             KIconEffect::semiTransparent(m_pixmap);
1051         }
1052
1053         if (m_layout == IconsLayout && isSelected()) {
1054             const QColor color = palette().brush(QPalette::Normal, QPalette::Highlight).color();
1055             QImage image = m_pixmap.toImage();
1056             if (image.isNull()) {
1057                 m_hoverPixmap = QPixmap();
1058                 return;
1059             }
1060             KIconEffect::colorize(image, color, 0.8f);
1061             m_pixmap = QPixmap::fromImage(image);
1062         }
1063     }
1064
1065     if (!m_overlay.isNull()) {
1066         QPainter painter(&m_pixmap);
1067         painter.drawPixmap(0, (m_pixmap.height() - m_overlay.height()) / m_pixmap.devicePixelRatio(), m_overlay);
1068     }
1069
1070     int scaledIconSize = 0;
1071     if (iconOnTop) {
1072         const TextInfo* textInfo = m_textInfo.value("text");
1073         scaledIconSize = static_cast<int>(textInfo->pos.y() - 2 * padding);
1074     } else {
1075         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
1076         const qreal requiredTextHeight = textRowsCount * m_customizedFontMetrics.height();
1077         scaledIconSize = (requiredTextHeight < maxIconHeight) ?
1078                            widgetSize.height() - 2 * padding : maxIconHeight;
1079     }
1080
1081     const int maxScaledIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : scaledIconSize;
1082     const int maxScaledIconHeight = scaledIconSize;
1083
1084     m_scaledPixmapSize = m_pixmap.size();
1085     m_scaledPixmapSize.scale(maxScaledIconWidth * qApp->devicePixelRatio(), maxScaledIconHeight * qApp->devicePixelRatio(), Qt::KeepAspectRatio);
1086     m_scaledPixmapSize = m_scaledPixmapSize / qApp->devicePixelRatio();
1087
1088     if (iconOnTop) {
1089         // Center horizontally and align on bottom within the icon-area
1090         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2.0);
1091         m_pixmapPos.setY(padding + scaledIconSize - m_scaledPixmapSize.height());
1092     } else {
1093         // Center horizontally and vertically within the icon-area
1094         const TextInfo* textInfo = m_textInfo.value("text");
1095         m_pixmapPos.setX(textInfo->pos.x() - 2.0 * padding
1096                       - (scaledIconSize + m_scaledPixmapSize.width()) / 2.0);
1097
1098         // Derive icon's vertical center from the center of the text frame, including
1099         // any necessary adjustment if the font's midline is offset from the frame center
1100         const qreal midlineShift = m_customizedFontMetrics.height() / 2.0
1101                     - m_customizedFontMetrics.descent()
1102                     - m_customizedFontMetrics.capHeight() / 2.0;
1103         m_pixmapPos.setY(m_textRect.center().y() + midlineShift - m_scaledPixmapSize.height() / 2.0);
1104
1105     }
1106
1107     if (m_layout == IconsLayout) {
1108         m_iconRect = QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize));
1109     } else {
1110         const qreal widthOffset = widgetIconSize - m_scaledPixmapSize.width();
1111         const qreal heightOffset = widgetIconSize - m_scaledPixmapSize.height();
1112         const QPointF squareIconPos(m_pixmapPos.x() - 0.5 * widthOffset,
1113                                     m_pixmapPos.y() - 0.5 * heightOffset);
1114         const QSizeF squareIconSize(widgetIconSize, widgetIconSize);
1115         m_iconRect = QRectF(squareIconPos, squareIconSize);
1116     }
1117
1118     // Prepare the pixmap that is used when the item gets hovered
1119     if (isHovered()) {
1120         m_hoverPixmap = m_pixmap;
1121         KIconEffect* effect = KIconLoader::global()->iconEffect();
1122         // In the KIconLoader terminology, active = hover.
1123         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
1124             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
1125         } else {
1126             m_hoverPixmap = m_pixmap;
1127         }
1128     } else if (hoverOpacity() <= 0.0) {
1129         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
1130         m_hoverPixmap = QPixmap();
1131     }
1132 }
1133
1134 void KStandardItemListWidget::updateTextsCache()
1135 {
1136     QTextOption textOption;
1137     switch (m_layout) {
1138     case IconsLayout:
1139         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
1140         textOption.setAlignment(Qt::AlignHCenter);
1141         break;
1142     case CompactLayout:
1143     case DetailsLayout:
1144         textOption.setAlignment(Qt::AlignLeft);
1145         textOption.setWrapMode(QTextOption::NoWrap);
1146         break;
1147     default:
1148         Q_ASSERT(false);
1149         break;
1150     }
1151
1152     qDeleteAll(m_textInfo);
1153     m_textInfo.clear();
1154     for (int i = 0; i < m_sortedVisibleRoles.count(); ++i) {
1155         TextInfo* textInfo = new TextInfo();
1156         textInfo->staticText.setTextFormat(Qt::PlainText);
1157         textInfo->staticText.setPerformanceHint(QStaticText::AggressiveCaching);
1158         textInfo->staticText.setTextOption(textOption);
1159         m_textInfo.insert(m_sortedVisibleRoles[i], textInfo);
1160     }
1161
1162     switch (m_layout) {
1163     case IconsLayout:   updateIconsLayoutTextCache(); break;
1164     case CompactLayout: updateCompactLayoutTextCache(); break;
1165     case DetailsLayout: updateDetailsLayoutTextCache(); break;
1166     default: Q_ASSERT(false); break;
1167     }
1168
1169     const TextInfo* ratingTextInfo = m_textInfo.value("rating");
1170     if (ratingTextInfo) {
1171         // The text of the rating-role has been set to empty to get
1172         // replaced by a rating-image showing the rating as stars.
1173         const KItemListStyleOption& option = styleOption();
1174         QSizeF ratingSize = preferredRatingSize(option);
1175
1176         const qreal availableWidth = (m_layout == DetailsLayout)
1177                                      ? columnWidth("rating") - columnPadding(option)
1178                                      : size().width();
1179         if (ratingSize.width() > availableWidth) {
1180             ratingSize.rwidth() = availableWidth;
1181         }
1182         const qreal dpr = qApp->devicePixelRatio();
1183         m_rating = QPixmap(ratingSize.toSize() * dpr);
1184         m_rating.setDevicePixelRatio(dpr);
1185         m_rating.fill(Qt::transparent);
1186
1187         QPainter painter(&m_rating);
1188         const QRect rect(QPoint(0, 0), ratingSize.toSize());
1189         const int rating = data().value("rating").toInt();
1190         KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
1191     } else if (!m_rating.isNull()) {
1192         m_rating = QPixmap();
1193     }
1194 }
1195
1196 QString KStandardItemListWidget::elideRightKeepExtension(const QString &text, int elidingWidth) const
1197 {
1198     const auto extensionIndex = text.lastIndexOf('.');
1199     if (extensionIndex != -1) {
1200         // has file extension
1201         const auto extensionLength = text.length() - extensionIndex;
1202         const auto extensionWidth = m_customizedFontMetrics.horizontalAdvance(text.right(extensionLength));
1203         if (elidingWidth > extensionWidth && extensionLength < 6 && (float(extensionWidth) / float(elidingWidth)) < 0.3) {
1204             // if we have room to display the file extension and the extension is not too long
1205             QString ret = m_customizedFontMetrics.elidedText(text.chopped(extensionLength),
1206                                                              Qt::ElideRight,
1207                                                              elidingWidth - extensionWidth);
1208 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
1209             ret.append(text.rightRef(extensionLength));
1210 #else
1211             ret.append(QStringView(text).right(extensionLength));
1212 #endif
1213             return ret;
1214         }
1215     }
1216     return m_customizedFontMetrics.elidedText(text,Qt::ElideRight,
1217                                               elidingWidth);
1218 }
1219
1220 void KStandardItemListWidget::updateIconsLayoutTextCache()
1221 {
1222     //      +------+
1223     //      | Icon |
1224     //      +------+
1225     //
1226     //    Name role that
1227     // might get wrapped above
1228     //    several lines.
1229     //  Additional role 1
1230     //  Additional role 2
1231
1232     const QHash<QByteArray, QVariant> values = data();
1233
1234     const KItemListStyleOption& option = styleOption();
1235     const qreal padding = option.padding;
1236     const qreal maxWidth = size().width() - 2 * padding;
1237     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1238
1239     // Initialize properties for the "text" role. It will be used as anchor
1240     // for initializing the position of the other roles.
1241     TextInfo* nameTextInfo = m_textInfo.value("text");
1242     const QString nameText = KStringHandler::preProcessWrap(values["text"].toString());
1243     nameTextInfo->staticText.setText(nameText);
1244
1245     // Calculate the number of lines required for the name and the required width
1246     qreal nameWidth = 0;
1247     qreal nameHeight = 0;
1248     QTextLine line;
1249
1250     QTextLayout layout(nameTextInfo->staticText.text(), m_customizedFont);
1251     layout.setTextOption(nameTextInfo->staticText.textOption());
1252     layout.beginLayout();
1253     int nameLineIndex = 0;
1254     while ((line = layout.createLine()).isValid()) {
1255         line.setLineWidth(maxWidth);
1256         nameWidth = qMax(nameWidth, line.naturalTextWidth());
1257         nameHeight += line.height();
1258
1259         ++nameLineIndex;
1260         if (nameLineIndex == option.maxTextLines) {
1261             // The maximum number of textlines has been reached. If this is
1262             // the case provide an elided text if necessary.
1263             const int textLength = line.textStart() + line.textLength();
1264             if (textLength < nameText.length()) {
1265                 // Elide the last line of the text
1266                 qreal elidingWidth = maxWidth;
1267                 qreal lastLineWidth;
1268                 do {
1269                     QString lastTextLine = nameText.mid(line.textStart());
1270                     lastTextLine = elideRightKeepExtension(lastTextLine, elidingWidth);
1271                     const QString elidedText = nameText.left(line.textStart()) + lastTextLine;
1272                     nameTextInfo->staticText.setText(elidedText);
1273
1274                     lastLineWidth = m_customizedFontMetrics.horizontalAdvance(lastTextLine);
1275
1276                     // We do the text eliding in a loop with decreasing width (1 px / iteration)
1277                     // to avoid problems related to different width calculation code paths
1278                     // within Qt. (see bug 337104)
1279                     elidingWidth -= 1.0;
1280                 } while (lastLineWidth > maxWidth);
1281
1282                 nameWidth = qMax(nameWidth, lastLineWidth);
1283             }
1284             break;
1285         }
1286     }
1287     layout.endLayout();
1288
1289     // Use one line for each additional information
1290     nameTextInfo->staticText.setTextWidth(maxWidth);
1291     nameTextInfo->pos = QPointF(padding, iconSize() + 2 * padding);
1292     m_textRect = QRectF(padding + (maxWidth - nameWidth) / 2,
1293                         nameTextInfo->pos.y(),
1294                         nameWidth,
1295                         nameHeight);
1296
1297     // Calculate the position for each additional information
1298     qreal y = nameTextInfo->pos.y() + nameHeight;
1299     for (const QByteArray& role : qAsConst(m_sortedVisibleRoles)) {
1300         if (role == "text") {
1301             continue;
1302         }
1303
1304         const QString text = roleText(role, values);
1305         TextInfo* textInfo = m_textInfo.value(role);
1306         textInfo->staticText.setText(text);
1307
1308         qreal requiredWidth = 0;
1309
1310         QTextLayout layout(text, m_customizedFont);
1311         QTextOption textOption;
1312         textOption.setWrapMode(QTextOption::NoWrap);
1313         layout.setTextOption(textOption);
1314
1315         layout.beginLayout();
1316         QTextLine textLine = layout.createLine();
1317         if (textLine.isValid()) {
1318             textLine.setLineWidth(maxWidth);
1319             requiredWidth = textLine.naturalTextWidth();
1320             if (requiredWidth > maxWidth) {
1321                 const QString elidedText = elideRightKeepExtension(text, maxWidth);
1322                 textInfo->staticText.setText(elidedText);
1323                 requiredWidth = m_customizedFontMetrics.horizontalAdvance(elidedText);
1324             } else if (role == "rating") {
1325                 // Use the width of the rating pixmap, because the rating text is empty.
1326                 requiredWidth = m_rating.width() / m_rating.devicePixelRatioF();
1327             }
1328         }
1329         layout.endLayout();
1330
1331         textInfo->pos = QPointF(padding, y);
1332         textInfo->staticText.setTextWidth(maxWidth);
1333
1334         const QRectF textRect(padding + (maxWidth - requiredWidth) / 2, y, requiredWidth, lineSpacing);
1335
1336         // Ignore empty roles. Avoids a text rect taller than the area that actually contains text.
1337         if (!textRect.isEmpty()) {
1338             m_textRect |= textRect;
1339         }
1340
1341         y += lineSpacing;
1342     }
1343
1344     // Add a padding to the text rectangle
1345     m_textRect.adjust(-padding, -padding, padding, padding);
1346 }
1347
1348 void KStandardItemListWidget::updateCompactLayoutTextCache()
1349 {
1350     // +------+  Name role
1351     // | Icon |  Additional role 1
1352     // +------+  Additional role 2
1353
1354     const QHash<QByteArray, QVariant> values = data();
1355
1356     const KItemListStyleOption& option = styleOption();
1357     const qreal widgetHeight = size().height();
1358     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1359     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * lineSpacing;
1360
1361     qreal maximumRequiredTextWidth = 0;
1362     const qreal x = option.padding * 3 + iconSize();
1363     qreal y = qRound((widgetHeight - textLinesHeight) / 2);
1364     const qreal maxWidth = size().width() - x - option.padding;
1365     for (const QByteArray& role : qAsConst(m_sortedVisibleRoles)) {
1366         const QString text = roleText(role, values);
1367         TextInfo* textInfo = m_textInfo.value(role);
1368         textInfo->staticText.setText(text);
1369
1370         qreal requiredWidth = m_customizedFontMetrics.horizontalAdvance(text);
1371         if (requiredWidth > maxWidth) {
1372             requiredWidth = maxWidth;
1373             const QString elidedText = elideRightKeepExtension(text, maxWidth);
1374             textInfo->staticText.setText(elidedText);
1375         }
1376
1377         textInfo->pos = QPointF(x, y);
1378         textInfo->staticText.setTextWidth(maxWidth);
1379
1380         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
1381
1382         y += lineSpacing;
1383     }
1384
1385     m_textRect = QRectF(x - option.padding, 0, maximumRequiredTextWidth + 2 * option.padding, widgetHeight);
1386 }
1387
1388 void KStandardItemListWidget::updateDetailsLayoutTextCache()
1389 {
1390     // Precondition: Requires already updated m_expansionArea
1391     // to determine the left position.
1392
1393     // +------+
1394     // | Icon |  Name role   Additional role 1   Additional role 2
1395     // +------+
1396     m_textRect = QRectF();
1397
1398     const KItemListStyleOption& option = styleOption();
1399     const QHash<QByteArray, QVariant> values = data();
1400
1401     const qreal widgetHeight = size().height();
1402     const int fontHeight = m_customizedFontMetrics.height();
1403
1404     const qreal columnWidthInc = columnPadding(option);
1405     qreal firstColumnInc = iconSize();
1406     if (m_supportsItemExpanding) {
1407         firstColumnInc += (m_expansionArea.left() + m_expansionArea.right() + widgetHeight) / 2;
1408     } else {
1409         firstColumnInc += option.padding + sidePadding();
1410     }
1411
1412     qreal x = firstColumnInc;
1413     const qreal y = qMax(qreal(option.padding), (widgetHeight - fontHeight) / 2);
1414
1415     for (const QByteArray& role : qAsConst(m_sortedVisibleRoles)) {
1416         QString text = roleText(role, values);
1417
1418         // Elide the text in case it does not fit into the available column-width
1419         qreal requiredWidth = m_customizedFontMetrics.horizontalAdvance(text);
1420         const qreal roleWidth = columnWidth(role);
1421         qreal availableTextWidth = roleWidth - columnWidthInc;
1422
1423         const bool isTextRole = (role == "text");
1424         if (isTextRole) {
1425             availableTextWidth -= firstColumnInc - sidePadding();
1426         }
1427
1428         if (requiredWidth > availableTextWidth) {
1429             text = elideRightKeepExtension(text, availableTextWidth);
1430             requiredWidth = m_customizedFontMetrics.horizontalAdvance(text);
1431         }
1432
1433         TextInfo* textInfo = m_textInfo.value(role);
1434         textInfo->staticText.setText(text);
1435         textInfo->pos = QPointF(x + columnWidthInc / 2, y);
1436         x += roleWidth;
1437
1438         if (isTextRole) {
1439             const qreal textWidth = option.extendedSelectionRegion
1440                                     ? size().width() - textInfo->pos.x()
1441                                     : requiredWidth + 2 * option.padding;
1442             m_textRect = QRectF(textInfo->pos.x() - option.padding, 0,
1443                                 textWidth, size().height());
1444
1445             // The column after the name should always be aligned on the same x-position independent
1446             // from the expansion-level shown in the name column
1447             x -= firstColumnInc - sidePadding();
1448         } else if (isRoleRightAligned(role)) {
1449             textInfo->pos.rx() += roleWidth - requiredWidth - columnWidthInc;
1450         }
1451     }
1452 }
1453
1454 void KStandardItemListWidget::updateAdditionalInfoTextColor()
1455 {
1456     QColor c1;
1457     if (m_customTextColor.isValid()) {
1458         c1 = m_customTextColor;
1459     } else if (isSelected()) {
1460         // The detail text colour needs to match the main text (HighlightedText) for the same level
1461         // of readability. We short circuit early here to avoid interpolating with another colour.
1462         m_additionalInfoTextColor = styleOption().palette.color(QPalette::HighlightedText);
1463         return;
1464     } else {
1465         c1 = styleOption().palette.text().color();
1466     }
1467
1468     // For the color of the additional info the inactive text color
1469     // is not used as this might lead to unreadable text for some color schemes. Instead
1470     // the text color c1 is slightly mixed with the background color.
1471     const QColor c2 = styleOption().palette.base().color();
1472     const int p1 = 70;
1473     const int p2 = 100 - p1;
1474     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
1475                                        (c1.green() * p1 + c2.green() * p2) / 100,
1476                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
1477 }
1478
1479 void KStandardItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
1480 {
1481     if (m_scaledPixmapSize != pixmap.size() / pixmap.devicePixelRatio()) {
1482         QPixmap scaledPixmap = pixmap;
1483         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize * qApp->devicePixelRatio());
1484         scaledPixmap.setDevicePixelRatio(qApp->devicePixelRatio());
1485         painter->drawPixmap(m_pixmapPos, scaledPixmap);
1486
1487 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
1488         painter->setPen(Qt::blue);
1489         painter->drawRect(QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize)));
1490 #endif
1491     } else {
1492         painter->drawPixmap(m_pixmapPos, pixmap);
1493     }
1494 }
1495
1496 void KStandardItemListWidget::drawSiblingsInformation(QPainter* painter)
1497 {
1498     const int siblingSize = size().height();
1499     const int x = (m_expansionArea.left() + m_expansionArea.right() - siblingSize) / 2;
1500     QRect siblingRect(x, 0, siblingSize, siblingSize);
1501
1502     bool isItemSibling = true;
1503
1504     const QBitArray siblings = siblingsInformation();
1505     QStyleOption option;
1506     const auto normalColor = option.palette.color(normalTextColorRole());
1507     const auto highlightColor = option.palette.color(expansionAreaHovered() ? QPalette::Highlight : normalTextColorRole());
1508     for (int i = siblings.count() - 1; i >= 0; --i) {
1509         option.rect = siblingRect;
1510         option.state = siblings.at(i) ? QStyle::State_Sibling : QStyle::State_None;
1511         if (isItemSibling) {
1512             option.state |= QStyle::State_Item;
1513             if (m_isExpandable) {
1514                 option.state |= QStyle::State_Children;
1515             }
1516             if (data().value("isExpanded").toBool()) {
1517                 option.state |= QStyle::State_Open;
1518             }
1519             option.palette.setColor(QPalette::Text, highlightColor);
1520             isItemSibling = false;
1521         } else {
1522             option.palette.setColor(QPalette::Text, normalColor);
1523         }
1524
1525         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &option, painter);
1526
1527         siblingRect.translate(-siblingRect.width(), 0);
1528     }
1529 }
1530
1531 QRectF KStandardItemListWidget::roleEditingRect(const QByteArray& role) const
1532 {
1533     const TextInfo* textInfo = m_textInfo.value(role);
1534     if (!textInfo) {
1535         return QRectF();
1536     }
1537
1538     QRectF rect(textInfo->pos, textInfo->staticText.size());
1539     if (m_layout == DetailsLayout) {
1540         rect.setWidth(columnWidth(role) - rect.x());
1541     }
1542
1543     return rect;
1544 }
1545
1546 void KStandardItemListWidget::closeRoleEditor()
1547 {
1548     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
1549                this, &KStandardItemListWidget::slotRoleEditingCanceled);
1550     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
1551                this, &KStandardItemListWidget::slotRoleEditingFinished);
1552
1553     if (m_roleEditor->hasFocus()) {
1554         // If the editing was not ended by a FocusOut event, we have
1555         // to transfer the keyboard focus back to the KItemListContainer.
1556         scene()->views()[0]->parentWidget()->setFocus();
1557     }
1558
1559     if (m_oldRoleEditor) {
1560         m_oldRoleEditor->deleteLater();
1561     }
1562     m_oldRoleEditor = m_roleEditor;
1563     m_roleEditor->hide();
1564     m_roleEditor = nullptr;
1565 }
1566
1567 QPixmap KStandardItemListWidget::pixmapForIcon(const QString& name, const QStringList& overlays, int size, QIcon::Mode mode)
1568 {
1569     static const QIcon fallbackIcon = QIcon::fromTheme(QStringLiteral("unknown"));
1570
1571     size *= qApp->devicePixelRatio();
1572
1573     const QString key = "KStandardItemListWidget:" % name % ":" % overlays.join(QLatin1Char(':')) % ":" % QString::number(size) % ":" % QString::number(mode);
1574     QPixmap pixmap;
1575
1576     if (!QPixmapCache::find(key, &pixmap)) {
1577         QIcon icon = QIcon::fromTheme(name);
1578         if (icon.isNull()) {
1579             icon = QIcon(name);
1580         }
1581         if (icon.isNull()
1582             || icon.pixmap(size / qApp->devicePixelRatio(), size / qApp->devicePixelRatio(), mode).isNull()) {
1583             icon = fallbackIcon;
1584         }
1585
1586         pixmap = icon.pixmap(size / qApp->devicePixelRatio(), size / qApp->devicePixelRatio(), mode);
1587         if (pixmap.width() != size || pixmap.height() != size) {
1588             KPixmapModifier::scale(pixmap, QSize(size, size));
1589         }
1590
1591         // Strangely KFileItem::overlays() returns empty string-values, so
1592         // we need to check first whether an overlay must be drawn at all.
1593         // It is more efficient to do it here, as KIconLoader::drawOverlays()
1594         // assumes that an overlay will be drawn and has some additional
1595         // setup time.
1596         for (const QString& overlay : overlays) {
1597             if (!overlay.isEmpty()) {
1598                 int state = KIconLoader::DefaultState;
1599
1600                 switch (mode) {
1601                 case QIcon::Normal:
1602                     break;
1603                 case QIcon::Active:
1604                     state = KIconLoader::ActiveState;
1605                     break;
1606                 case QIcon::Disabled:
1607                     state = KIconLoader::DisabledState;
1608                     break;
1609                 case QIcon::Selected:
1610                     state = KIconLoader::SelectedState;
1611                     break;
1612                 }
1613
1614                 // There is at least one overlay, draw all overlays above m_pixmap
1615                 // and cancel the check
1616                 KIconLoader::global()->drawOverlays(overlays, pixmap, KIconLoader::Desktop, state);
1617                 break;
1618             }
1619         }
1620
1621         QPixmapCache::insert(key, pixmap);
1622     }
1623     pixmap.setDevicePixelRatio(qApp->devicePixelRatio());
1624
1625     return pixmap;
1626 }
1627
1628 QSizeF KStandardItemListWidget::preferredRatingSize(const KItemListStyleOption& option)
1629 {
1630     const qreal height = option.fontMetrics.ascent();
1631     return QSizeF(height * 5, height);
1632 }
1633
1634 qreal KStandardItemListWidget::columnPadding(const KItemListStyleOption& option)
1635 {
1636     return option.padding * 6;
1637 }
1638