Add Trash (empty, isEmpty, emptinessChanged)

Summary: Add `Trash` class to handle all trash operations.

Reviewers: elvisangelaccio, markg, ngraham

Reviewed By: elvisangelaccio, markg, ngraham

Subscribers: ngraham, markg, rkflx, elvisangelaccio, #dolphin

Differential Revision: https://phabricator.kde.org/D11012

1 files changed, 81 insertions, 0 deletions

diff --git a/src/trash/dolphintrash.cpp b/src/trash/dolphintrash.cpp
new file mode 100644
index 000000000..10d9badf5
--- /dev/null
+++ b/src/trash/dolphintrash.cpp
@@ -0,0 +1,81 @@
+/***************************************************************************
+ *   Copyright (C) 2012 by Peter Penz <[email protected]>             *
+ *   Copyright (C) 2018 by Roman Inflianskas <[email protected]>           *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "dolphintrash.h"
+
+#include <KIO/JobUiDelegate>
+#include <KJobWidgets>
+#include <QList>
+#include <KNotification>
+#include <KConfig>
+#include <KConfigGroup>
+
+
+Trash::Trash()
+    : m_trashDirLister(new KDirLister())
+{
+    // The trash icon must always be updated dependent on whether
+    // the trash is empty or not. We use a KDirLister that automatically
+    // watches for changes if the number of items has been changed.
+    m_trashDirLister->setAutoErrorHandlingEnabled(false, nullptr);
+    m_trashDirLister->setDelayedMimeTypes(true);
+    auto trashDirContentChanged = [this]() {
+        bool isTrashEmpty = m_trashDirLister->items().isEmpty();
+        emit emptinessChanged(isTrashEmpty);
+    };
+    connect(m_trashDirLister, static_cast<void(KDirLister::*)()>(&KDirLister::completed), trashDirContentChanged);
+    m_trashDirLister->openUrl(QStringLiteral("trash:/"));
+}
+
+Trash::~Trash()
+{
+    delete m_trashDirLister;
+}
+
+Trash &Trash::instance()
+{
+    static Trash result;
+    return result;
+}
+
+KIO::Job *Trash::empty(QWidget *window)
+{
+    KIO::JobUiDelegate uiDelegate;
+    uiDelegate.setWindow(window);
+    bool confirmed = uiDelegate.askDeleteConfirmation(QList<QUrl>(), KIO::JobUiDelegate::EmptyTrash, KIO::JobUiDelegate::DefaultConfirmation);
+    if (confirmed) {
+        KIO::Job* job = KIO::emptyTrash();
+        KJobWidgets::setWindow(job, window);
+        job->uiDelegate()->setAutoErrorHandlingEnabled(true);
+         // as long as KIO doesn't do this, do it ourselves
+        connect(job, &KIO::Job::result, [](){
+            KNotification::event(QStringLiteral("Trash: emptied"), QString(), QPixmap(), nullptr, KNotification::DefaultEvent);
+        });
+        return job;
+    }
+    return nullptr;
+}
+
+bool Trash::isEmpty()
+{
+    KConfig trashConfig(QStringLiteral("trashrc"), KConfig::SimpleConfig);
+    return (trashConfig.group("Status").readEntry("Empty", true));
+}
+