Summary: Fixes crash when hiding devices

Summary:
Fixes crash when hiding devices. The crash is caused by
KStandardItem::setDataValue which calls the
KStandardItemModel::onItemChanged function, and that function will
delete the KStandardItem if the data value being set is the hidden
attribute being set to true. To fix this KStandardItem now derives
QObject so that we can use deleteLater.

Test Plan:
Right click a device in the places panel and select hide
Right click the places panel and select show hidden
Right click the hidden device and select show
Right click the same device and select hide

BUG: 403064

Reviewers: #dolphin, elvisangelaccio

Reviewed By: #dolphin, elvisangelaccio

Subscribers: kfm-devel

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D21050

3 files changed, 7 insertions, 42 deletions

diff --git a/src/kitemviews/kstandarditem.cpp b/src/kitemviews/kstandarditem.cpp
index 4fb3f8f98..b3bbcaa41 100644
--- a/src/kitemviews/kstandarditem.cpp
+++ b/src/kitemviews/kstandarditem.cpp
@@ -21,16 +21,14 @@
 #include "kstandarditemmodel.h"
 
 KStandardItem::KStandardItem(KStandardItem* parent) :
-    m_parent(parent),
-    m_children(),
+    QObject(parent),
     m_model(nullptr),
     m_data()
 {
 }
 
 KStandardItem::KStandardItem(const QString& text, KStandardItem* parent) :
-    m_parent(parent),
-    m_children(),
+    QObject(parent),
     m_model(nullptr),
     m_data()
 {
@@ -38,8 +36,7 @@ KStandardItem::KStandardItem(const QString& text, KStandardItem* parent) :
 }
 
 KStandardItem::KStandardItem(const QString& icon, const QString& text, KStandardItem* parent) :
-    m_parent(parent),
-    m_children(),
+    QObject(parent),
     m_model(nullptr),
     m_data()
 {
@@ -47,14 +44,6 @@ KStandardItem::KStandardItem(const QString& icon, const QString& text, KStandard
     setText(text);
 }
 
-KStandardItem::KStandardItem(const KStandardItem& item) :
-    m_parent(item.m_parent),
-    m_children(item.m_children),
-    m_model(item.m_model),
-    m_data(item.m_data)
-{
-}
-
 KStandardItem::~KStandardItem()
 {
 }
@@ -123,17 +112,6 @@ QVariant KStandardItem::dataValue(const QByteArray& role) const
     return m_data[role];
 }
 
-void KStandardItem::setParent(KStandardItem* parent)
-{
-    // TODO: not implemented yet
-    m_parent = parent;
-}
-
-KStandardItem* KStandardItem::parent() const
-{
-    return m_parent;
-}
-
 void KStandardItem::setData(const QHash<QByteArray, QVariant>& values)
 {
     const QHash<QByteArray, QVariant> previous = m_data;
@@ -146,11 +124,6 @@ QHash<QByteArray, QVariant> KStandardItem::data() const
     return m_data;
 }
 
-QList<KStandardItem*> KStandardItem::children() const
-{
-    return m_children;
-}
-
 void KStandardItem::onDataValueChanged(const QByteArray& role,
                                        const QVariant& current,
                                        const QVariant& previous)
diff --git a/src/kitemviews/kstandarditem.h b/src/kitemviews/kstandarditem.h
index fec197c06..ad3452d77 100644
--- a/src/kitemviews/kstandarditem.h
+++ b/src/kitemviews/kstandarditem.h
@@ -24,7 +24,7 @@
 
 #include <QByteArray>
 #include <QHash>
-#include <QList>
+#include <QObject>
 #include <QVariant>
 
 class KStandardItemModel;
@@ -36,14 +36,13 @@ class KStandardItemModel;
  * used roles. It is possible to assign values for custom
  * roles by using setDataValue().
  */
-class DOLPHIN_EXPORT KStandardItem
+class DOLPHIN_EXPORT KStandardItem : public QObject
 {
-
+    Q_OBJECT
 public:
     explicit KStandardItem(KStandardItem* parent = nullptr);
     explicit KStandardItem(const QString& text, KStandardItem* parent = nullptr);
     KStandardItem(const QString& icon, const QString& text, KStandardItem* parent = nullptr);
-    KStandardItem(const KStandardItem& item);
     virtual ~KStandardItem();
 
     /**
@@ -70,14 +69,9 @@ public:
     void setDataValue(const QByteArray& role, const QVariant& value);
     QVariant dataValue(const QByteArray& role) const;
 
-    void setParent(KStandardItem* parent);
-    KStandardItem* parent() const;
-
     void setData(const QHash<QByteArray, QVariant>& values);
     QHash<QByteArray, QVariant> data() const;
 
-    QList<KStandardItem*> children() const;
-
 protected:
     virtual void onDataValueChanged(const QByteArray& role,
                                     const QVariant& current,
@@ -87,8 +81,6 @@ protected:
                                const QHash<QByteArray, QVariant>& previous);
 
 private:
-    KStandardItem* m_parent;
-    QList<KStandardItem*> m_children;
     KStandardItemModel* m_model;
 
     QHash<QByteArray, QVariant> m_data;
diff --git a/src/kitemviews/kstandarditemmodel.cpp b/src/kitemviews/kstandarditemmodel.cpp
index a4d42b571..d7307c0bd 100644
--- a/src/kitemviews/kstandarditemmodel.cpp
+++ b/src/kitemviews/kstandarditemmodel.cpp
@@ -112,7 +112,7 @@ void KStandardItemModel::removeItem(int index)
 
         onItemRemoved(index, item);
 
-        delete item;
+        item->deleteLater();
         item = nullptr;
 
         emit itemsRemoved(KItemRangeList() << KItemRange(index, 1));