CppEditor: Rework CppIncludeHierarchy model

Use a Utils::TreeModel as base for the model. Avoid excessive
expansion of items during incremental search.

Change-Id: Ic2f51c7e467ea127ccf69ef7d122cec4a63be2f5
Task-number: QTCREATORBUG-15834
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cppeditor/cppincludehierarchy.h

@@ -26,83 +26,46 @@
 #pragma once
 
 #include <coreplugin/inavigationwidgetfactory.h>
+#include <utils/treemodel.h>
 
-#include <QString>
-#include <QStackedWidget>
-#include <QWidget>
-
-QT_BEGIN_NAMESPACE
-class QStandardItemModel;
-class QStandardItem;
-class QModelIndex;
-class QLabel;
-QT_END_NAMESPACE
-
-namespace Core { class IEditor; }
-
-namespace TextEditor {
-class BaseTextEditor;
-class TextEditorLinkLabel;
-}
-
-namespace Utils {
-class AnnotatedItemDelegate;
-class FileName;
-}
+#include <QSet>
 
 namespace CppEditor {
 namespace Internal {
 
-class CppEditor;
-class CppEditorWidget;
-class CppInclude;
-class CppIncludeHierarchyModel;
-class CppIncludeHierarchyTreeView;
+class CppIncludeHierarchyItem;
 
-class CppIncludeHierarchyWidget : public QWidget
+class CppIncludeHierarchyModel : public Utils::UniformTreeModel<CppIncludeHierarchyItem>
 {
     Q_OBJECT
-public:
-    CppIncludeHierarchyWidget();
-    virtual ~CppIncludeHierarchyWidget();
 
-    void perform();
+public:
+    CppIncludeHierarchyModel();
+
+    Qt::DropActions supportedDragActions() const override;
+    QStringList mimeTypes() const override;
+    QMimeData *mimeData(const QModelIndexList &indexes) const override;
+
+    void buildHierarchy(const QString &filePath);
+    QString editorFilePath() const { return m_editorFilePath; }
+    void setSearching(bool on);
+    QString toString() const;
 
 private:
-    void onItemActivated(const QModelIndex &index);
-    void editorsClosed(QList<Core::IEditor *> editors);
-    void showNoIncludeHierarchyLabel();
-    void showIncludeHierarchy();
-
-    CppEditorWidget *m_cppEditor;
-    CppIncludeHierarchyTreeView *m_treeView;
-    CppIncludeHierarchyModel *m_model;
-    Utils::AnnotatedItemDelegate *m_delegate;
-    TextEditor::TextEditorLinkLabel *m_inspectedFile;
-    QLabel *m_includeHierarchyInfoLabel;
-    TextEditor::BaseTextEditor *m_editor;
-};
-
-// @todo: Pretty much the same design as the OutlineWidgetStack. Maybe we can generalize the
-// outline factory so that it works for different widgets that support the same editor.
-class CppIncludeHierarchyStackedWidget : public QStackedWidget
-{
-    Q_OBJECT
-public:
-    CppIncludeHierarchyStackedWidget(QWidget *parent = 0);
-    virtual ~CppIncludeHierarchyStackedWidget();
-
-private:
-    CppIncludeHierarchyWidget *m_typeHiearchyWidgetInstance;
+    friend class CppIncludeHierarchyItem;
+    QString m_editorFilePath;
+    QSet<QString> m_seen;
+    bool m_searching = false;
 };
 
 class CppIncludeHierarchyFactory : public Core::INavigationWidgetFactory
 {
     Q_OBJECT
+
 public:
     CppIncludeHierarchyFactory();
 
-    Core::NavigationView createWidget();
+    Core::NavigationView createWidget() override;
 };
 
 } // namespace Internal