Completely rework currentNode/currentProject handling

Centralize the handling inside a new class ProjectTree.
React to moving focus and remove most special handling.

This properly fixes the linked task.

Task-number: QTCREATORBUG-13357
Change-Id: I6b06aa32b1e4305ec8a6d432857b302585d8734b
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/src/plugins/projectexplorer/projecttree.h b/src/plugins/projectexplorer/projecttree.h
new file mode 100644
index 0000000000..4a4c9d8da0
--- /dev/null
+++ b/src/plugins/projectexplorer/projecttree.h
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://www.qt.io/licensing.  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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef PROJECTTREE_H
+#define PROJECTTREE_H
+
+#include "projectexplorer_export.h"
+
+#include <coreplugin/icontext.h>
+
+#include <QObject>
+
+namespace ProjectExplorer {
+class FileNode;
+class FolderNode;
+class Node;
+class Project;
+class ProjectNode;
+
+namespace Internal {
+class ProjectTreeWidget;
+}
+
+class PROJECTEXPLORER_EXPORT ProjectTree : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ProjectTree(QObject *parent = 0);
+
+    static ProjectTree *instance();
+
+    static Project *currentProject();
+    static Node *currentNode();
+
+    // Integration with ProjectTreeWidget
+    static void registerWidget(ProjectExplorer::Internal::ProjectTreeWidget *widget);
+    static void unregisterWidget(ProjectExplorer::Internal::ProjectTreeWidget *widget);
+    static void nodeChanged(ProjectExplorer::Internal::ProjectTreeWidget *widget);
+    static void focusChanged();
+    static Project *projectForNode(Node *node);
+
+signals:
+    void currentProjectChanged(ProjectExplorer::Project *project);
+    void currentNodeChanged(ProjectExplorer::Node *node, ProjectExplorer::Project *project);
+
+private:
+    void updateFromProjectTreeWidget(ProjectExplorer::Internal::ProjectTreeWidget *widget);
+    void documentManagerCurrentFileChanged();
+    void updateFromDocumentManager(bool invalidCurrentNode = false);
+    void update(Node *node, Project *project);
+    void updateContext();
+
+    // slots to kepp the current node/current project from deletion
+    void foldersAboutToBeRemoved(FolderNode *, const QList<FolderNode *> &list);
+    void foldersRemoved();
+    void filesAboutToBeRemoved(FolderNode *, const QList<FileNode *> &list);
+    void filesRemoved();
+    void aboutToRemoveProject(ProjectExplorer::Project *project);
+    void projectRemoved();
+
+    void nodesAdded();
+    void updateFromFocus(bool invalidCurrentNode = false);
+
+    void updateExternalFileWarning();
+    bool editorHasFocus();
+    static bool hasFocus(Internal::ProjectTreeWidget *widget);
+
+
+    static ProjectTree *s_instance;
+    QList<ProjectExplorer::Internal::ProjectTreeWidget *> m_projectTreeWidgets;
+    Node *m_currentNode;
+    Project *m_currentProject;
+    bool m_resetCurrentNodeFolder;
+    bool m_resetCurrentNodeFile;
+    bool m_resetCurrentNodeProject;
+    Core::Context m_lastProjectContext;
+};
+}
+
+#endif // PROJECTTREE_H