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