Add new ModelEditor plugin.

The plugin is based on the 'modelinglib' library. For features and
screenshots see https://wiki.qt.io/ModelEditor

Change-Id: I857be0652a852cc69a9729f64e67134fe630af00
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/modeleditor/modeldocument.cpp

@@ -0,0 +1,192 @@
+/***************************************************************************
+**
+** Copyright (C) 2015 Jochen Becher
+** Contact: http://www.qt.io/licensing
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company.  For licensing terms and
+** conditions see http://www.qt.io/terms-conditions.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, The Qt Company gives you certain additional
+** rights.  These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "modeldocument.h"
+
+#include "modeleditor_constants.h"
+#include "modeleditor_plugin.h"
+#include "modelsmanager.h"
+#include "extdocumentcontroller.h"
+
+#include "qmt/infrastructure/ioexceptions.h"
+#include "qmt/model_controller/modelcontroller.h"
+#include "qmt/model/mdiagram.h"
+#include "qmt/project_controller/projectcontroller.h"
+#include "qmt/project/project.h"
+
+#include <coreplugin/id.h>
+#include <utils/fileutils.h>
+
+#include <QFileInfo>
+
+namespace ModelEditor {
+namespace Internal {
+
+class ModelDocument::ModelDocumentPrivate {
+public:
+    ExtDocumentController *documentController = 0;
+    qmt::Uid diagramUid;
+};
+
+ModelDocument::ModelDocument(QObject *parent)
+    : Core::IDocument(parent),
+      d(new ModelDocumentPrivate)
+{
+    setId(ModelEditor::Constants::MODEL_EDITOR_ID);
+    setMimeType(QLatin1String(Constants::MIME_TYPE_MODEL));
+}
+
+ModelDocument::~ModelDocument()
+{
+    if (d->documentController)
+        ModelEditorPlugin::modelsManager()->release(d->documentController, this);
+    delete d;
+}
+
+Core::IDocument::OpenResult ModelDocument::open(QString *errorString, const QString &fileName,
+                                                const QString &realFileName)
+{
+    Q_UNUSED(fileName);
+
+    if (!load(errorString, realFileName))
+        return Core::IDocument::OpenResult::ReadError;
+    return Core::IDocument::OpenResult::Success;
+}
+
+bool ModelDocument::save(QString *errorString, const QString &name, bool autoSave)
+{
+    if (!d->documentController) {
+        *errorString = tr("No model loaded. Cannot save.");
+        return false;
+    }
+
+    QString actualName = filePath().toString();
+    if (!name.isEmpty())
+        actualName = name;
+    d->documentController->getProjectController()->setFileName(actualName);
+    try {
+        d->documentController->getProjectController()->save();
+    } catch (const qmt::Exception &ex) {
+        *errorString = ex.getErrorMsg();
+        return false;
+    }
+
+    if (!autoSave) {
+        setFilePath(Utils::FileName::fromString(d->documentController->getProjectController()->getProject()->getFileName()));
+        emit changed();
+    }
+
+    onDiagramRenamed();
+    return true;
+}
+
+QString ModelDocument::defaultPath() const
+{
+    return QLatin1String(".");
+}
+
+QString ModelDocument::suggestedFileName() const
+{
+    return tr("model.qmodel");
+}
+
+bool ModelDocument::isModified() const
+{
+    return d->documentController ? d->documentController->getProjectController()->isModified() : false;
+}
+
+bool ModelDocument::isSaveAsAllowed() const
+{
+    return true;
+}
+
+bool ModelDocument::reload(QString *errorString, Core::IDocument::ReloadFlag flag,
+                           Core::IDocument::ChangeType type)
+{
+    if (flag == FlagIgnore)
+        return true;
+    if (type == TypePermissions) {
+        emit changed();
+        return true;
+    }
+    *errorString = tr("Cannot reload model file.");
+    return false;
+}
+
+ExtDocumentController *ModelDocument::documentController() const
+{
+    return d->documentController;
+}
+
+qmt::Uid ModelDocument::diagramUid() const
+{
+    return d->diagramUid;
+}
+
+bool ModelDocument::load(QString *errorString, const QString &fileName)
+{
+    d->documentController = ModelEditorPlugin::modelsManager()->findModelByFileName(fileName, this);
+    if (d->documentController) {
+        connect(d->documentController, &qmt::DocumentController::changed,
+                this, &IDocument::changed);
+        setFilePath(Utils::FileName::fromString(d->documentController->getProjectController()->getProject()->getFileName()));
+    } else {
+        d->documentController = ModelEditorPlugin::modelsManager()->createModel(this);
+        connect(d->documentController, &qmt::DocumentController::changed,
+                this, &IDocument::changed);
+
+        try {
+            d->documentController->loadProject(fileName);
+            setFilePath(Utils::FileName::fromString(d->documentController->getProjectController()->getProject()->getFileName()));
+        } catch (const qmt::Exception &ex) {
+            *errorString = ex.getErrorMsg();
+            return false;
+        }
+    }
+
+    qmt::MDiagram *rootDiagram = d->documentController->findOrCreateRootDiagram();
+    d->diagramUid = rootDiagram->getUid();
+
+    onDiagramRenamed();
+    emit contentSet();
+    return true;
+}
+
+void ModelDocument::onDiagramRenamed()
+{
+    qmt::MDiagram *diagram = d->documentController->getModelController()->findObject<qmt::MDiagram>(d->diagramUid);
+    if (diagram)
+        setPreferredDisplayName(tr("%1 [%2]").arg(diagram->getName()).arg(filePath().fileName()));
+    else
+        setPreferredDisplayName(QString());
+}
+
+} // namespace Internal
+} // namespace ModelEditor