From 0c881f0c1b77cf8876094e3647d1732210b954d1 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Wed, 21 Mar 2018 17:34:05 +0100
Subject: An extension mechanism load qml files at generic extension points.

and forward the email via an extension api.
---
 framework/qml/ExtensionPoint.qml | 37 +++++++++++++++++++++++++++++++++++++
 framework/qml/MailViewer.qml     | 11 +++++++++--
 framework/qmldir                 |  1 +
 framework/src/extensionmodel.cpp | 24 ++++++++++++++++++++----
 framework/src/extensionmodel.h   |  5 +++++
 5 files changed, 72 insertions(+), 6 deletions(-)
 create mode 100644 framework/qml/ExtensionPoint.qml

(limited to 'framework')

diff --git a/framework/qml/ExtensionPoint.qml b/framework/qml/ExtensionPoint.qml
new file mode 100644
index 00000000..4f66b20e
--- /dev/null
+++ b/framework/qml/ExtensionPoint.qml
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2017 Christian Mollekopf, <mollekopf@kolabsys.com>
+ *
+ * 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.
+ */
+
+import QtQuick 2.7
+
+import org.kube.framework 1.0 as Kube
+
+Repeater {
+    id: root
+    property alias extensionPoint: extensionModel.extensionPoint
+    property variant context: {}
+
+    model: Kube.ExtensionModel {
+        id: extensionModel
+    }
+    Loader {
+        source: root.model.findSource(model.name, "main.qml")
+        onLoaded: {
+            item.context = root.context
+        }
+    }
+}
diff --git a/framework/qml/MailViewer.qml b/framework/qml/MailViewer.qml
index 2a1af3a6..e9759d72 100644
--- a/framework/qml/MailViewer.qml
+++ b/framework/qml/MailViewer.qml
@@ -348,6 +348,8 @@ Rectangle {
     }
     Item {
         id: footer
+        property var mail: model.mail
+        property string subject: model.subject
 
         anchors.bottom: parent.bottom
 
@@ -373,13 +375,12 @@ Rectangle {
             }
         }
 
-        Grid {
+        Row {
             anchors {
                 verticalCenter: parent.verticalCenter
                 right: parent.right
                 rightMargin: Kube.Units.largeSpacing
             }
-            columns: 2
             spacing: Kube.Units.smallSpacing
 
             Kube.Button {
@@ -405,6 +406,12 @@ Rectangle {
                     }
                 }
             }
+            Row {
+                Kube.ExtensionPoint {
+                    extensionPoint: "extensions/mailview"
+                    context: {"mail": footer.mail, "subject": footer.subject, "accountId": currentAccount}
+                }
+            }
         }
     }
 
diff --git a/framework/qmldir b/framework/qmldir
index 80146b8e..4a6f40ef 100644
--- a/framework/qmldir
+++ b/framework/qmldir
@@ -45,6 +45,7 @@ TreeView 1.0 TreeView.qml
 GridView 1.0 GridView.qml
 ScrollHelper 1.0 ScrollHelper.qml
 ModelIndexRetriever 1.0 ModelIndexRetriever.qml
+ExtensionPoint 1.0 ExtensionPoint.qml
 singleton Messages 1.0 Messages.qml
 singleton Notifications 1.0 Notifications.qml
 singleton Colors 1.0 Colors.qml
diff --git a/framework/src/extensionmodel.cpp b/framework/src/extensionmodel.cpp
index e3fab7d8..5f42aa7a 100644
--- a/framework/src/extensionmodel.cpp
+++ b/framework/src/extensionmodel.cpp
@@ -47,12 +47,17 @@ QHash<int, QByteArray> ExtensionModel::roleNames() const
 
 void ExtensionModel::load()
 {
-    auto model = new QStandardItemModel(this);
-
+    if (auto m = sourceModel()) {
+        setSourceModel(nullptr);
+        delete m;
+    }
     auto engine = qmlEngine(this);
-    Q_ASSERT(engine);
+    if (!engine) {
+        return;
+    }
+    auto model = new QStandardItemModel(this);
     for (const auto &path : engine->importPathList()) {
-        QDir dir{path + "/org/kube/views"};
+        QDir dir{path + "/org/kube/" + mExtensionPoint};
         for (const auto &pluginName : dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot)) {
             const auto pluginPath = dir.path() + "/" + pluginName;
             mPaths.insert(pluginName, pluginPath);
@@ -101,6 +106,17 @@ QVariantList ExtensionModel::sortOrder() const
     return {};
 }
 
+void ExtensionModel::setExtensionPoint(const QString &extensionPoint)
+{
+    mExtensionPoint = extensionPoint;
+    QTimer::singleShot(0, this, &ExtensionModel::load);
+}
+
+QString ExtensionModel::extensionPoint() const
+{
+    return mExtensionPoint;
+}
+
 QVariant ExtensionModel::data(const QModelIndex &idx, int role) const
 {
     return QSortFilterProxyModel::data(idx, role);
diff --git a/framework/src/extensionmodel.h b/framework/src/extensionmodel.h
index 5360cc2f..07601e57 100644
--- a/framework/src/extensionmodel.h
+++ b/framework/src/extensionmodel.h
@@ -29,6 +29,7 @@ class ExtensionModel : public QSortFilterProxyModel
     Q_OBJECT
 
     Q_PROPERTY(QVariantList sortOrder WRITE setSortOrder READ sortOrder)
+    Q_PROPERTY(QString extensionPoint WRITE setExtensionPoint READ extensionPoint)
 public:
 
     ExtensionModel(QObject *parent = Q_NULLPTR);
@@ -49,6 +50,9 @@ public:
     void setSortOrder(const QVariantList &order);
     QVariantList sortOrder() const;
 
+    void setExtensionPoint(const QString &order);
+    QString extensionPoint() const;
+
     Q_INVOKABLE QString findSource(const QString &extensionName, const QString &sourceName);
 
 private slots:
@@ -57,6 +61,7 @@ private slots:
 private:
     QStringList mSortOrder;
     QHash<QString, QString> mPaths;
+    QString mExtensionPoint;
 };
 
 }
-- 
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