src/selectionmode/bottombarcontentscontainer.cpp

   1 /*
   2     This file is part of the KDE project
   3     SPDX-FileCopyrightText: 2022 Felix Ernst <felixernst@zohomail.eu>
   4
   5     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
   6 */
   7
   8 #include "bottombarcontentscontainer.h"
   9
  10 #include "dolphin_generalsettings.h"
  11 #include "dolphincontextmenu.h"
  12 #include "dolphinmainwindow.h"
  13 #include "dolphinremoveaction.h"
  14 #include "kitemviews/kfileitemlisttostring.h"
  15
  16 #include <KLocalizedString>
  17
  18 #include <QHBoxLayout>
  19 #include <QLabel>
  20 #include <QMenu>
  21 #include <QPushButton>
  22 #include <QToolButton>
  23 #include <QVBoxLayout>
  24
  25 #include <unordered_set>
  26
  27 using namespace SelectionMode;
  28
  29 BottomBarContentsContainer::BottomBarContentsContainer(KActionCollection *actionCollection, QWidget *parent) :
  30     QWidget{parent},
  31     m_actionCollection{actionCollection}
  32 {
  33     // We will mostly interact with m_layout when changing the contents and not care about the other internal hierarchy.
  34     m_layout = new QHBoxLayout(this);
  35 }
  36
  37 void BottomBarContentsContainer::resetContents(BottomBar::Contents contents)
  38 {
  39     emptyBarContents();
  40
  41     // A label is added in many of the methods below. We only know its size a bit later and if it should be hidden.
  42     QTimer::singleShot(10, this, [this](){ updateExplanatoryLabelVisibility(); });
  43
  44     Q_CHECK_PTR(m_actionCollection);
  45     m_contents = contents;
  46     switch (contents) {
  47     case BottomBar::CopyContents:
  48         return addCopyContents();
  49     case BottomBar::CopyLocationContents:
  50         return addCopyLocationContents();
  51     case BottomBar::CopyToOtherViewContents:
  52         return addCopyToOtherViewContents();
  53     case BottomBar::CutContents:
  54         return addCutContents();
  55     case BottomBar::DeleteContents:
  56         return addDeleteContents();
  57     case BottomBar::DuplicateContents:
  58         return addDuplicateContents();
  59     case BottomBar::GeneralContents:
  60         return addGeneralContents();
  61     case BottomBar::PasteContents:
  62         return addPasteContents();
  63     case BottomBar::MoveToOtherViewContents:
  64         return addMoveToOtherViewContents();
  65     case BottomBar::MoveToTrashContents:
  66         return addMoveToTrashContents();
  67     case BottomBar::RenameContents:
  68         return addRenameContents();
  69     }
  70 }
  71
  72 void BottomBarContentsContainer::adaptToNewBarWidth(int newBarWidth)
  73 {
  74     m_barWidth = newBarWidth;
  75
  76     if (m_contents == BottomBar::GeneralContents) {
  77         Q_ASSERT(m_overflowButton);
  78         if (unusedSpace() < 0) {
  79             // The bottom bar is overflowing! We need to hide some of the widgets.
  80             for (auto i = m_generalBarActions.rbegin(); i != m_generalBarActions.rend(); ++i) {
  81                 if (!i->isWidgetVisible()) {
  82                     continue;
  83                 }
  84                 i->widget()->setVisible(false);
  85
  86                 // Add the action to the overflow.
  87                 auto overflowMenu = m_overflowButton->menu();
  88                 if (overflowMenu->actions().isEmpty()) {
  89                     overflowMenu->addAction(i->action());
  90                 } else {
  91                     overflowMenu->insertAction(overflowMenu->actions().at(0), i->action());
  92                 }
  93                 m_overflowButton->setVisible(true);
  94                 if (unusedSpace() >= 0) {
  95                     break; // All widgets fit now.
  96                 }
  97             }
  98         } else {
  99             // We have some unusedSpace(). Let's check if we can maybe add more of the contextual actions' widgets.
 100             for (auto i = m_generalBarActions.begin(); i != m_generalBarActions.end(); ++i) {
 101                 if (i->isWidgetVisible()) {
 102                     continue;
 103                 }
 104                 if (!i->widget()) {
 105                     i->newWidget(this);
 106                     i->widget()->setVisible(false);
 107                     m_layout->insertWidget(m_layout->count() - 1, i->widget()); // Insert before m_overflowButton
 108                 }
 109                 if (unusedSpace() < i->widget()->sizeHint().width()) {
 110                     // It doesn't fit. We keep it invisible.
 111                     break;
 112                 }
 113                 i->widget()->setVisible(true);
 114
 115                 // Remove the action from the overflow.
 116                 auto overflowMenu = m_overflowButton->menu();
 117                 overflowMenu->removeAction(i->action());
 118                 if (overflowMenu->isEmpty()) {
 119                     m_overflowButton->setVisible(false);
 120                 }
 121             }
 122         }
 123     }
 124
 125     // Hide the leading explanation if it doesn't fit. The buttons are labeled clear enough that this shouldn't be a big UX problem.
 126     updateExplanatoryLabelVisibility();
 127 }
 128
 129 void BottomBarContentsContainer::slotSelectionChanged(const KFileItemList &selection, const QUrl &baseUrl)
 130 {
 131     if (m_contents == BottomBar::GeneralContents) {
 132         auto contextActions = contextActionsFor(selection, baseUrl);
 133         m_generalBarActions.clear();
 134         if (contextActions.empty()) {
 135             // We have nothing to show
 136             Q_ASSERT(qobject_cast<BottomBar *>(parentWidget()->parentWidget()->parentWidget()));
 137             if (isVisibleTo(parentWidget()->parentWidget()->parentWidget()->parentWidget())) { // is the bar visible
 138                 Q_EMIT barVisibilityChangeRequested(false);
 139             }
 140         } else {
 141             for (auto i = contextActions.begin(); i != contextActions.end(); ++i) {
 142                 m_generalBarActions.emplace_back(ActionWithWidget{*i});
 143             }
 144             resetContents(BottomBar::GeneralContents);
 145
 146             Q_EMIT barVisibilityChangeRequested(true);
 147         }
 148     }
 149     updateMainActionButton(selection);
 150 }
 151
 152 void BottomBarContentsContainer::addCopyContents()
 153 {
 154     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be copied."), this);
 155     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 156     m_explanatoryLabel->setWordWrap(true);
 157     m_layout->addWidget(m_explanatoryLabel);
 158
 159     // i18n: Aborts the current step-by-step process to copy files by leaving the selection mode.
 160     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Copying"), this);
 161     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 162     m_layout->addWidget(cancelButton);
 163
 164     auto *copyButton = new QPushButton(this);
 165     // We claim to have PasteContents already so triggering the copy action next won't instantly hide the bottom bar.
 166     connect(copyButton, &QAbstractButton::clicked, [this]() {
 167         if (GeneralSettings::showPasteBarAfterCopying()) {
 168             m_contents = BottomBar::Contents::PasteContents; // prevents hiding
 169         }
 170     });
 171     // Connect the copy action as a second step.
 172     m_mainAction = ActionWithWidget(m_actionCollection->action(KStandardAction::name(KStandardAction::Copy)), copyButton);
 173     // Finally connect the lambda that actually changes the contents to the PasteContents.
 174     connect(copyButton, &QAbstractButton::clicked, [this]() {
 175         if (GeneralSettings::showPasteBarAfterCopying()) {
 176             resetContents(BottomBar::Contents::PasteContents); // resetContents() needs to be connected last because
 177                 // it instantly deletes the button and then the other slots won't be called.
 178         }
 179         Q_EMIT leaveSelectionModeRequested();
 180     });
 181     updateMainActionButton(KFileItemList());
 182     m_layout->addWidget(copyButton);
 183 }
 184
 185 void BottomBarContentsContainer::addCopyLocationContents()
 186 {
 187     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select one file or folder whose location should be copied."), this);
 188     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 189     m_explanatoryLabel->setWordWrap(true);
 190     m_layout->addWidget(m_explanatoryLabel);
 191
 192     // i18n: Aborts the current step-by-step process to copy the location of files by leaving the selection mode.
 193     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Copying"), this);
 194     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 195     m_layout->addWidget(cancelButton);
 196
 197     auto *copyLocationButton = new QPushButton(this);
 198     m_mainAction = ActionWithWidget(m_actionCollection->action(QStringLiteral("copy_location")), copyLocationButton);
 199     updateMainActionButton(KFileItemList());
 200     m_layout->addWidget(copyLocationButton);
 201 }
 202
 203 void BottomBarContentsContainer::addCopyToOtherViewContents()
 204 {
 205     // i18n: "Copy over" refers to copying to the other split view area that is currently visible to the user.
 206     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be copied over."), this);
 207     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 208     m_explanatoryLabel->setWordWrap(true);
 209     m_layout->addWidget(m_explanatoryLabel);
 210
 211     // i18n: Aborts the current step-by-step process to copy the location of files by leaving the selection mode.
 212     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Copying"), this);
 213     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 214     m_layout->addWidget(cancelButton);
 215
 216     auto *copyToOtherViewButton = new QPushButton(this);
 217     m_mainAction = ActionWithWidget(m_actionCollection->action(QStringLiteral("copy_to_inactive_split_view")), copyToOtherViewButton);
 218     updateMainActionButton(KFileItemList());
 219     m_layout->addWidget(copyToOtherViewButton);
 220 }
 221
 222 void BottomBarContentsContainer::addCutContents()
 223 {
 224     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be cut."), this);
 225     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 226     m_explanatoryLabel->setWordWrap(true);
 227     m_layout->addWidget(m_explanatoryLabel);
 228
 229     // i18n: Aborts the current step-by-step process to cut files by leaving the selection mode.
 230     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Cutting"), this);
 231     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 232     m_layout->addWidget(cancelButton);
 233
 234     auto *cutButton = new QPushButton(this);
 235     // We claim to have PasteContents already so triggering the cut action next won't instantly hide the bottom bar.
 236     connect(cutButton, &QAbstractButton::clicked, [this]() {
 237         if (GeneralSettings::showPasteBarAfterCopying()) {
 238             m_contents = BottomBar::Contents::PasteContents; // prevents hiding
 239         }
 240     });
 241     // Connect the cut action as a second step.
 242     m_mainAction = ActionWithWidget(m_actionCollection->action(KStandardAction::name(KStandardAction::Cut)), cutButton);
 243     // Finally connect the lambda that actually changes the contents to the PasteContents.
 244     connect(cutButton, &QAbstractButton::clicked, [this](){
 245         if (GeneralSettings::showPasteBarAfterCopying()) {
 246             resetContents(BottomBar::Contents::PasteContents); // resetContents() needs to be connected last because
 247                 // it instantly deletes the button and then the other slots won't be called.
 248         }
 249         Q_EMIT leaveSelectionModeRequested();
 250     });
 251     updateMainActionButton(KFileItemList());
 252     m_layout->addWidget(cutButton);
 253 }
 254
 255 void BottomBarContentsContainer::addDeleteContents()
 256 {
 257     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be permanently deleted."), this);
 258     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 259     m_explanatoryLabel->setWordWrap(true);
 260     m_layout->addWidget(m_explanatoryLabel);
 261
 262     // i18n: Aborts the current step-by-step process to delete files by leaving the selection mode.
 263     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort"), this);
 264     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 265     m_layout->addWidget(cancelButton);
 266
 267     auto *deleteButton = new QPushButton(this);
 268     m_mainAction = ActionWithWidget(m_actionCollection->action(KStandardAction::name(KStandardAction::DeleteFile)), deleteButton);
 269     updateMainActionButton(KFileItemList());
 270     m_layout->addWidget(deleteButton);
 271 }
 272
 273 void BottomBarContentsContainer::addDuplicateContents()
 274 {
 275     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be duplicated here."), this);
 276     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 277     m_explanatoryLabel->setWordWrap(true);
 278     m_layout->addWidget(m_explanatoryLabel);
 279
 280     // i18n: Aborts the current step-by-step process to duplicate files by leaving the selection mode.
 281     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Duplicating"), this);
 282     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 283     m_layout->addWidget(cancelButton);
 284
 285     auto *duplicateButton = new QPushButton(this);
 286     m_mainAction = ActionWithWidget(m_actionCollection->action(QStringLiteral("duplicate")), duplicateButton);
 287     updateMainActionButton(KFileItemList());
 288     m_layout->addWidget(duplicateButton);
 289 }
 290
 291 void BottomBarContentsContainer::addGeneralContents()
 292 {
 293     if (!m_overflowButton) {
 294         m_overflowButton = new QToolButton{this};
 295         // i18n: This button appears in a bar if there isn't enough horizontal space to fit all the other buttons.
 296         // The small icon-only button opens a menu that contains the actions that didn't fit on the bar.
 297         // Since this is an icon-only button this text will only appear as a tooltip and as accessibility text.
 298         m_overflowButton->setToolTip(i18nc("@action", "More"));
 299         m_overflowButton->setAccessibleName(m_overflowButton->toolTip());
 300         m_overflowButton->setIcon(QIcon::fromTheme(QStringLiteral("view-more-horizontal-symbolic")));
 301         m_overflowButton->setMenu(new QMenu{m_overflowButton});
 302         m_overflowButton->setPopupMode(QToolButton::ToolButtonPopupMode::InstantPopup);
 303         m_overflowButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::MinimumExpanding); // Makes sure it has the same height as the labeled buttons.
 304         m_layout->addWidget(m_overflowButton);
 305     } else {
 306         m_overflowButton->menu()->actions().clear();
 307         // The overflowButton should be part of the calculation for needed space so we set it visible in regards to unusedSpace().
 308         m_overflowButton->setVisible(true);
 309     }
 310
 311     // We first add all the m_generalBarActions to the bar until the bar is full.
 312     auto i = m_generalBarActions.begin();
 313     for (; i != m_generalBarActions.end(); ++i) {
 314         if (i->action()->isVisible()) {
 315             if (i->widget()) {
 316                 i->widget()->setEnabled(i->action()->isEnabled());
 317             } else {
 318                 i->newWidget(this);
 319                 i->widget()->setVisible(false);
 320                 m_layout->insertWidget(m_layout->count() - 1, i->widget()); // Insert before m_overflowButton
 321             }
 322             if (unusedSpace() < i->widget()->sizeHint().width()) {
 323                 break; // The bar is too full already. We keep it invisible.
 324             } else {
 325                 i->widget()->setVisible(true);
 326             }
 327         }
 328     }
 329     // We are done adding widgets to the bar so either we were able to fit all the actions in there
 330     m_overflowButton->setVisible(false);
 331     // …or there are more actions left which need to be put into m_overflowButton.
 332     for (; i != m_generalBarActions.end(); ++i) {
 333         m_overflowButton->menu()->addAction(i->action());
 334
 335         // The overflowButton is set visible if there is actually an action in it.
 336         if (!m_overflowButton->isVisible() && i->action()->isVisible() && !i->action()->isSeparator()) {
 337             m_overflowButton->setVisible(true);
 338         }
 339     }
 340 }
 341
 342 void BottomBarContentsContainer::addMoveToOtherViewContents()
 343 {
 344     // i18n: "Move over" refers to moving to the other split view area that is currently visible to the user.
 345     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be moved over."), this);
 346     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 347     m_explanatoryLabel->setWordWrap(true);
 348     m_layout->addWidget(m_explanatoryLabel);
 349
 350     // i18n: Aborts the current step-by-step process to copy the location of files by leaving the selection mode.
 351     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort Moving"), this);
 352     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 353     m_layout->addWidget(cancelButton);
 354
 355     auto *moveToOtherViewButton = new QPushButton(this);
 356     m_mainAction = ActionWithWidget(m_actionCollection->action(QStringLiteral("move_to_inactive_split_view")), moveToOtherViewButton);
 357     updateMainActionButton(KFileItemList());
 358     m_layout->addWidget(moveToOtherViewButton);
 359 }
 360
 361 void BottomBarContentsContainer::addMoveToTrashContents()
 362 {
 363     m_explanatoryLabel = new QLabel(i18nc("@info explaining the next step in a process", "Select the files and folders that should be moved to the Trash."), this);
 364     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 365     m_explanatoryLabel->setWordWrap(true);
 366     m_layout->addWidget(m_explanatoryLabel);
 367
 368     // i18n: Aborts the current step-by-step process of moving files to the trash by leaving the selection mode.
 369     auto *cancelButton = new QPushButton(i18nc("@action:button", "Abort"), this);
 370     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 371     m_layout->addWidget(cancelButton);
 372
 373     auto *moveToTrashButton = new QPushButton(this);
 374     m_mainAction = ActionWithWidget(m_actionCollection->action(KStandardAction::name(KStandardAction::MoveToTrash)), moveToTrashButton);
 375     updateMainActionButton(KFileItemList());
 376     m_layout->addWidget(moveToTrashButton);
 377 }
 378
 379 void BottomBarContentsContainer::addPasteContents()
 380 {
 381     m_explanatoryLabel = new QLabel(xi18n("<para>The selected files and folders were added to the Clipboard. "
 382             "Now the <emphasis>Paste</emphasis> action can be used to transfer them from the Clipboard "
 383             "to any other location. They can even be transferred to other applications by using their "
 384             "respective <emphasis>Paste</emphasis> actions.</para>"), this);
 385     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 386     m_explanatoryLabel->setWordWrap(true);
 387     m_layout->addWidget(m_explanatoryLabel);
 388
 389     auto *vBoxLayout = new QVBoxLayout(this);
 390     m_layout->addLayout(vBoxLayout);
 391
 392     /** We are in "PasteContents" mode which means hiding the bottom bar is impossible.
 393      * So we first have to claim that we have different contents before requesting to leave selection mode. */
 394     auto actuallyLeaveSelectionMode = [this]() {
 395         m_contents = BottomBar::Contents::CopyLocationContents;
 396         Q_EMIT leaveSelectionModeRequested();
 397     };
 398
 399     auto *pasteButton = new QPushButton(this);
 400     copyActionDataToButton(pasteButton, m_actionCollection->action(KStandardAction::name(KStandardAction::Paste)));
 401     pasteButton->setText(i18nc("@action A more elaborate and clearly worded version of the Paste action", "Paste from Clipboard"));
 402     connect(pasteButton, &QAbstractButton::clicked, this, actuallyLeaveSelectionMode);
 403     vBoxLayout->addWidget(pasteButton);
 404
 405     auto *dismissButton = new QToolButton(this);
 406     dismissButton->setText(i18nc("@action Dismisses a bar explaining how to use the Paste action", "Dismiss This Reminder"));
 407     connect(dismissButton, &QAbstractButton::clicked, this, actuallyLeaveSelectionMode);
 408     auto *dontRemindAgainAction = new QAction(i18nc("@action Dismisses an explanatory area and never shows it again", "Don't Remind Me Again"), this);
 409     connect(dontRemindAgainAction, &QAction::triggered, this, []() {
 410         GeneralSettings::setShowPasteBarAfterCopying(false);
 411     });
 412     connect(dontRemindAgainAction, &QAction::triggered, this, actuallyLeaveSelectionMode);
 413     auto *dismissButtonMenu = new QMenu(dismissButton);
 414     dismissButtonMenu->addAction(dontRemindAgainAction);
 415     dismissButton->setMenu(dismissButtonMenu);
 416     dismissButton->setPopupMode(QToolButton::MenuButtonPopup);
 417     vBoxLayout->addWidget(dismissButton);
 418
 419     m_explanatoryLabel->setMaximumHeight(pasteButton->sizeHint().height() + dismissButton->sizeHint().height() + m_explanatoryLabel->fontMetrics().height());
 420 }
 421
 422 void BottomBarContentsContainer::addRenameContents()
 423 {
 424     m_explanatoryLabel = new QLabel(i18nc("@info explains the next step in a process", "Select the file or folder that should be renamed.\nBulk renaming is possible when multiple items are selected."), this);
 425     m_explanatoryLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
 426     m_explanatoryLabel->setWordWrap(true);
 427     m_layout->addWidget(m_explanatoryLabel);
 428
 429     // i18n: Aborts the current step-by-step process to delete files by leaving the selection mode.
 430     auto *cancelButton = new QPushButton(i18nc("@action:button", "Stop Renaming"), this);
 431     connect(cancelButton, &QAbstractButton::clicked, this, &BottomBarContentsContainer::leaveSelectionModeRequested);
 432     m_layout->addWidget(cancelButton);
 433
 434     auto *renameButton = new QPushButton(this);
 435     m_mainAction = ActionWithWidget(m_actionCollection->action(KStandardAction::name(KStandardAction::RenameFile)), renameButton);
 436     updateMainActionButton(KFileItemList());
 437     m_layout->addWidget(renameButton);
 438 }
 439
 440 void BottomBarContentsContainer::emptyBarContents()
 441 {
 442     QLayoutItem *child;
 443     while ((child = m_layout->takeAt(0)) != nullptr) {
 444         if (auto *childLayout = child->layout()) {
 445             QLayoutItem *grandChild;
 446             while ((grandChild = childLayout->takeAt(0)) != nullptr) {
 447                 delete grandChild->widget(); // delete the widget
 448                 delete grandChild;   // delete the layout item
 449             }
 450         }
 451         delete child->widget(); // delete the widget
 452         delete child;   // delete the layout item
 453     }
 454 }
 455
 456 std::vector<QAction *> BottomBarContentsContainer::contextActionsFor(const KFileItemList& selectedItems, const QUrl& baseUrl)
 457 {
 458     if (selectedItems.isEmpty()) {
 459         // There are no contextual actions to show for these items.
 460         // We might even want to hide this bar in this case. To make this clear, we reset m_internalContextMenu.
 461         m_internalContextMenu.release()->deleteLater();
 462         return std::vector<QAction *>{};
 463     }
 464
 465     std::vector<QAction *> contextActions;
 466
 467     // We always want to show the most important actions at the beginning
 468     contextActions.emplace_back(m_actionCollection->action(KStandardAction::name(KStandardAction::Copy)));
 469     contextActions.emplace_back(m_actionCollection->action(KStandardAction::name(KStandardAction::Cut)));
 470     contextActions.emplace_back(m_actionCollection->action(KStandardAction::name(KStandardAction::RenameFile)));
 471     contextActions.emplace_back(m_actionCollection->action(KStandardAction::name(KStandardAction::MoveToTrash)));
 472
 473     // We are going to add the actions from the right-click context menu for the selected items.
 474     auto *dolphinMainWindow = qobject_cast<DolphinMainWindow *>(window());
 475     Q_CHECK_PTR(dolphinMainWindow);
 476     if (!m_fileItemActions) {
 477         m_fileItemActions = new KFileItemActions(this);
 478         m_fileItemActions->setParentWidget(dolphinMainWindow);
 479         connect(m_fileItemActions, &KFileItemActions::error, this, &BottomBarContentsContainer::error);
 480     }
 481     m_internalContextMenu = std::make_unique<DolphinContextMenu>(dolphinMainWindow, selectedItems.constFirst(), selectedItems, baseUrl, m_fileItemActions);
 482     auto internalContextMenuActions = m_internalContextMenu->actions();
 483
 484     // There are some actions which we wouldn't want to add. We remember them in the actionsThatShouldntBeAdded set.
 485     // We don't want to add the four basic actions again which were already added to the top.
 486     std::unordered_set<QAction *> actionsThatShouldntBeAdded{contextActions.begin(), contextActions.end()};
 487     // "Delete" isn't really necessary to add because we have "Move to Trash" already. It is also more dangerous so let's exclude it.
 488     actionsThatShouldntBeAdded.insert(m_actionCollection->action(KStandardAction::name(KStandardAction::DeleteFile)));
 489
 490     // KHamburgerMenu would only be visible if there is no menu available anywhere on the user interface. This might be useful for recovery from
 491     // such a situation in theory but a bar with context dependent actions doesn't really seem like the right place for it.
 492     Q_ASSERT(internalContextMenuActions.first()->icon().name() == m_actionCollection->action(KStandardAction::name(KStandardAction::HamburgerMenu))->icon().name());
 493     internalContextMenuActions.removeFirst();
 494
 495     for (auto it = internalContextMenuActions.constBegin(); it != internalContextMenuActions.constEnd(); ++it) {
 496         if (actionsThatShouldntBeAdded.count(*it)) {
 497             continue; // Skip this action.
 498         }
 499         if (!qobject_cast<DolphinRemoveAction *>(*it)) { // We already have a "Move to Trash" action so we don't want a DolphinRemoveAction.
 500             // We filter duplicate separators here so we won't have to deal with them later.
 501             if (!contextActions.back()->isSeparator() || !(*it)->isSeparator()) {
 502                 contextActions.emplace_back((*it));
 503             }
 504         }
 505     }
 506     return contextActions;
 507 }
 508
 509 int BottomBarContentsContainer::unusedSpace() const
 510 {
 511     int sumOfPreferredWidths = m_layout->contentsMargins().left() + m_layout->contentsMargins().right();
 512     if (m_overflowButton) {
 513         sumOfPreferredWidths += m_overflowButton->sizeHint().width();
 514     }
 515     for (int i = 0; i < m_layout->count(); ++i) {
 516         auto widget = m_layout->itemAt(i)->widget();
 517         if (widget && !widget->isVisibleTo(widget->parentWidget())) {
 518             continue; // We don't count invisible widgets.
 519         }
 520         sumOfPreferredWidths += m_layout->itemAt(i)->sizeHint().width() + m_layout->spacing();
 521     }
 522     return m_barWidth - sumOfPreferredWidths - 20; // We consider all space used when there are only 20 pixels left
 523                                                       // so there is some room to breath and not too much wonkyness while resizing.
 524 }
 525
 526 void BottomBarContentsContainer::updateExplanatoryLabelVisibility()
 527 {
 528     if (!m_explanatoryLabel) {
 529         return;
 530     }
 531     if (m_explanatoryLabel->isVisible()) {
 532         m_explanatoryLabel->setVisible(unusedSpace() > 0);
 533     } else {
 534         // We only want to re-show the label when it fits comfortably so the computation below adds another "+20".
 535         m_explanatoryLabel->setVisible(unusedSpace() > m_explanatoryLabel->sizeHint().width() + 20);
 536     }
 537 }
 538
 539 void BottomBarContentsContainer::updateMainActionButton(const KFileItemList& selectedItems)
 540 {
 541     if (!m_mainAction.widget()) {
 542         return;
 543     }
 544     Q_ASSERT(qobject_cast<QAbstractButton *>(m_mainAction.widget()));
 545
 546     // Users are nudged towards selecting items by having the button disabled when nothing is selected.
 547     m_mainAction.widget()->setEnabled(selectedItems.count() > 0 && m_mainAction.action()->isEnabled());
 548     QFontMetrics fontMetrics = m_mainAction.widget()->fontMetrics();
 549
 550     QString buttonText;
 551     switch (m_contents) {
 552     case BottomBar::CopyContents:
 553         // i18n: A more elaborate and clearly worded version of the Copy action
 554         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 555         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 556         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 557         // and a fallback will be used.
 558         buttonText = i18ncp("@action", "Copy %2 to the Clipboard", "Copy %2 to the Clipboard", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 559         // All these long lines can not be broken up with line breaks becaue the i18n call should be completely
 560         // in the line following the "i18n:" comment without any line breaks within the i18n call
 561         // or the comment might not be correctly extracted. See: https://commits.kde.org/kxmlgui/a31135046e1b3335b5d7bbbe6aa9a883ce3284c1
 562         break;
 563     case BottomBar::CopyLocationContents:
 564         // i18n: A more elaborate and clearly worded version of the Copy Location action
 565         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 566         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 567         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 568         // and a fallback will be used.
 569         buttonText = i18ncp("@action", "Copy the Location of %2 to the Clipboard", "Copy the Location of %2 to the Clipboard", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 570         break;
 571     case BottomBar::CutContents:
 572         // i18n: A more elaborate and clearly worded version of the Cut action
 573         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 574         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 575         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 576         // and a fallback will be used.
 577         buttonText = i18ncp("@action", "Cut %2 to the Clipboard", "Cut %2 to the Clipboard", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 578         break;
 579     case BottomBar::DeleteContents:
 580         // i18n: A more elaborate and clearly worded version of the Delete action
 581         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 582         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 583         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 584         // and a fallback will be used.
 585         buttonText = i18ncp("@action", "Permanently Delete %2", "Permanently Delete %2", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 586         break;
 587     case BottomBar::DuplicateContents:
 588         // i18n: A more elaborate and clearly worded version of the Duplicate action
 589         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 590         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 591         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 592         // and a fallback will be used.
 593         buttonText = i18ncp("@action", "Duplicate %2", "Duplicate %2", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 594         break;
 595     case BottomBar::MoveToTrashContents:
 596         // i18n: A more elaborate and clearly worded version of the Trash action
 597         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 598         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 599         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 600         // and a fallback will be used.
 601         buttonText = i18ncp("@action", "Move %2 to the Trash", "Move %2 to the Trash", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 602         break;
 603     case BottomBar::RenameContents:
 604         // i18n: A more elaborate and clearly worded version of the Rename action
 605         // %2 is a textual representation of the currently selected files or folders. This can be the name of
 606         // the file/files like "file1" or "file1, file2 and file3" or an aggregate like "8 Selected Folders".
 607         // If this sort of word puzzle can not be correctly translated in your language, translate it as "NULL" (without the quotes)
 608         // and a fallback will be used.
 609         buttonText = i18ncp("@action", "Rename %2", "Rename %2", selectedItems.count(), fileItemListToString(selectedItems, fontMetrics.averageCharWidth() * 20, fontMetrics));
 610         break;
 611     default:
 612         return;
 613     }
 614     if (buttonText != QStringLiteral("NULL")) {
 615         static_cast<QAbstractButton *>(m_mainAction.widget())->setText(buttonText);
 616
 617         // The width of the button has changed. We might want to hide the label so the full button text fits on the bar.
 618         updateExplanatoryLabelVisibility();
 619     }
 620 }