make editMode a corona global property

Summary:
The plans are to switch on/off the whole plasma shell into edit mode.
For this it needs to be a global corona property, rather then just
containmentInterface.
Plasmashell would expose a dbus call to set it from systemsettings

Test Plan: plasmoid.editMode=true still works

Reviewers: #plasma, #vdg, ngraham

Reviewed By: #vdg, ngraham

Subscribers: ngraham, GB_2, broulik, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D24239

src/plasma/corona.cpp

@@ -380,6 +380,26 @@ void Corona::setImmutability(const Types::ImmutabilityType immutable)
         cg.writeEntry("immutability", (int)d->immutability);
         requestConfigSync();
     }
+
+    if (d->immutability != Types::Mutable) {
+        d->editMode = false;
+        emit editModeChanged();
+    }
+}
+
+void Corona::setEditMode(bool edit)
+{
+    if (d->immutability != Plasma::Types::Mutable || edit == d->editMode) {
+        return;
+    }
+
+    d->editMode = edit;
+    emit editModeChanged();
+}
+
+bool Corona::isEditMode() const
+{
+    return d->editMode;
 }
 
 QList<Plasma::Types::Location> Corona::freeEdges(int screen) const

src/plasma/corona.h

@@ -257,6 +257,21 @@ public:
      */
     Types::ImmutabilityType immutability() const;
 
+    /**
+     * Set the Corona globally into "edit mode" 
+     * Only when the corona is of mutable type can be set of edit mode.
+     * This indicates the UI to make easy for the user to manipulate applets.
+     * @param edit
+     * @since 5.63
+     */
+    void setEditMode(bool edit);
+
+    /**
+     * @returns true if the corona is in edit mode
+     * @since 5.63
+     */
+    bool isEditMode() const;
+
 public Q_SLOTS:
     /**
      * Load applet layout from a config file. The results will be added to the
@@ -358,6 +373,13 @@ Q_SIGNALS:
      */
     void screenAdded(int id);
 
+    /**
+     * emitted when the editMode state changes
+     * @see isEditMode()
+     * @since 5.63
+     */
+    void editModeChanged();
+
 #ifndef PLASMA_NO_DEPRECATED
     /**
      * Emitted when the package for this corona has been changed.

src/plasma/private/corona_p.h

@@ -60,6 +60,7 @@ public:
     QList<Containment *> containments;
     KActionCollection actions;
     int containmentsStarting;
+    bool editMode = false;
 };
 
 }

src/scriptengines/qml/plasmoid/containmentinterface.cpp

@@ -60,8 +60,7 @@ ContainmentInterface::ContainmentInterface(DeclarativeAppletScript *parent, cons
     : AppletInterface(parent, args),
       m_wallpaperInterface(nullptr),
       m_activityInfo(nullptr),
-      m_wheelDelta(0),
-      m_editMode(false)
+      m_wheelDelta(0)
 {
     m_containment = static_cast<Plasma::Containment *>(appletScript()->applet()->containment());
 
@@ -72,6 +71,9 @@ ContainmentInterface::ContainmentInterface(DeclarativeAppletScript *parent, cons
     connect(m_containment.data(), &Plasma::Containment::appletAdded,
             this, &ContainmentInterface::appletAddedForward);
 
+    connect(m_containment->corona(), &Plasma::Corona::editModeChanged,
+            this, &ContainmentInterface::editModeChanged);
+
     if (!m_appletInterfaces.isEmpty()) {
         emit appletsChanged();
     }
@@ -402,23 +404,19 @@ QPointF ContainmentInterface::adjustToAvailableScreenRegion(int x, int y, int w,
     return rect.topLeft();
 }
 
+QAction *ContainmentInterface::globalAction(QString name) const
+{
+    return m_containment->corona()->actions()->action(name);
+}
+
 bool ContainmentInterface::isEditMode() const
 {
-    return m_editMode;
+    return m_containment->corona()->isEditMode();
 }
 
 void ContainmentInterface::setEditMode(bool edit)
 {
-    if (edit == m_editMode) {
-        return;
-    }
-
-    if (m_containment->immutability() != Plasma::Types::Mutable) {
-        return;
-    }
-
-    m_editMode = edit;
-    emit editModeChanged();
+    m_containment->corona()->setEditMode(edit);
 }
 
 void ContainmentInterface::processMimeData(QObject *mimeDataProxy, int x, int y, KIO::DropJob *dropJob)

src/scriptengines/qml/plasmoid/containmentinterface.h

@@ -79,10 +79,11 @@ class ContainmentInterface : public AppletInterface
     Q_PROPERTY(QList<QObject *> actions READ actions NOTIFY actionsChanged)
 
     /**
-     * True when the containment is in an edit mode that allows to move
+     * True when the Plasma Shell is in an edit mode that allows to move
      * things around: it's different from userConfiguring as it's about
      * editing plasmoids inside the containment, rather than the containment
-     * settings dialog itself
+     * settings dialog itself.
+     * This is global for the whole Plasma process, all containments will have the same value for editMode
      */
     Q_PROPERTY(bool editMode READ isEditMode WRITE setEditMode NOTIFY editModeChanged)
 
@@ -150,6 +151,11 @@ public:
      */
     Q_INVOKABLE QPointF adjustToAvailableScreenRegion(int x, int y, int w, int h) const;
 
+    /**
+     * @returns a named action from global Corona's actions
+     */
+    Q_INVOKABLE QAction *globalAction(QString name) const;
+
     bool isEditMode() const;
     void setEditMode(bool edit);
 
@@ -220,7 +226,6 @@ private:
     QPointer<Plasma::Containment> m_containment;
     QPointer<QMenu> m_contextMenu;
     int m_wheelDelta;
-    bool m_editMode : 1;
     friend class AppletInterface;
 };