CppEditor: introduce include hierarchy

Based on type hierarchy.

Added to context menu ('Open Include Hierarchy')
Shortcut(Ctrl+Shift+I)

'Include Hierarchy' contains:
FileName for which 'Include Hierarchy' is done
Includes(which files are included by current file - tree hierarchy)
Included by(which files include current file - tree hierarchy)

It is possible to open/goto each file by clicking on specific item.
Additionally for 'Included by' files it goes to the line where is include
directive for current file.

Change-Id: I549b1ed64e4c9f6955f60d00efb12950a3259f81
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/plugins/cppeditor/cppincludehierarchy.cpp

@@ -0,0 +1,231 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Przemyslaw Gorszkowski <pgorszkowski@gmail.com>
+** 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://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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.
+**
+****************************************************************************/
+
+#include "cppincludehierarchy.h"
+
+#include "cppeditor.h"
+#include "cppeditorconstants.h"
+#include "cppeditorplugin.h"
+#include "cppelementevaluator.h"
+#include "cppincludehierarchymodel.h"
+#include "cppincludehierarchytreeview.h"
+
+#include <cplusplus/CppDocument.h>
+
+#include <utils/annotateditemdelegate.h>
+#include <utils/fileutils.h>
+
+#include <QDir>
+#include <QLabel>
+#include <QLatin1String>
+#include <QModelIndex>
+#include <QStandardItem>
+#include <QVBoxLayout>
+
+using namespace CppEditor;
+using namespace Internal;
+using namespace Utils;
+
+namespace CppEditor {
+namespace Internal {
+
+class CppIncludeLabel : public QLabel
+{
+public:
+    CppIncludeLabel(QWidget *parent)
+        : QLabel(parent)
+    {}
+
+    void setup(const QString &fileName, const QString &filePath)
+    {
+        setText(fileName);
+        m_link = CPPEditorWidget::Link(filePath);
+    }
+
+private:
+    void mousePressEvent(QMouseEvent *)
+    {
+        if (!m_link.hasValidTarget())
+            return;
+
+        Core::EditorManager::openEditorAt(m_link.targetFileName,
+                                          m_link.targetLine,
+                                          m_link.targetColumn,
+                                          Constants::CPPEDITOR_ID);
+    }
+
+    CPPEditorWidget::Link m_link;
+};
+
+// CppIncludeHierarchyWidget
+CppIncludeHierarchyWidget::CppIncludeHierarchyWidget() :
+    QWidget(0),
+    m_treeView(0),
+    m_model(0),
+    m_delegate(0),
+    m_includeHierarchyInfoLabel(0)
+{
+    m_inspectedFile = new CppIncludeLabel(this);
+    m_inspectedFile->setMargin(5);
+    m_model = new CppIncludeHierarchyModel(this);
+    m_treeView = new CppIncludeHierarchyTreeView(this);
+    m_delegate = new AnnotatedItemDelegate(this);
+    m_delegate->setDelimiter(QLatin1String(" "));
+    m_delegate->setAnnotationRole(AnnotationRole);
+    m_treeView->setModel(m_model);
+    m_treeView->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    m_treeView->setItemDelegate(m_delegate);
+
+    connect(m_treeView, SIGNAL(clicked(QModelIndex)), this, SLOT(onItemClicked(QModelIndex)));
+
+    m_includeHierarchyInfoLabel = new QLabel(tr("No include hierarchy available"), this);
+    m_includeHierarchyInfoLabel->setAlignment(Qt::AlignCenter);
+    m_includeHierarchyInfoLabel->setAutoFillBackground(true);
+    m_includeHierarchyInfoLabel->setBackgroundRole(QPalette::Base);
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->setMargin(0);
+    layout->setSpacing(0);
+    layout->addWidget(m_inspectedFile);
+    layout->addWidget(m_treeView);
+    layout->addWidget(m_includeHierarchyInfoLabel);
+    setLayout(layout);
+
+    connect(CppEditorPlugin::instance(), SIGNAL(includeHierarchyRequested()), SLOT(perform()));
+}
+
+CppIncludeHierarchyWidget::~CppIncludeHierarchyWidget()
+{
+}
+
+void CppIncludeHierarchyWidget::perform()
+{
+    showNoIncludeHierarchyLabel();
+
+    CPPEditor *editor = qobject_cast<CPPEditor *>(Core::EditorManager::currentEditor());
+    if (!editor)
+        return;
+    CPPEditorWidget *widget = qobject_cast<CPPEditorWidget *>(editor->widget());
+    if (!widget)
+        return;
+
+    m_model->clear();
+    m_model->buildHierarchy(widget->editorDocument()->filePath());
+    if (m_model->isEmpty())
+        return;
+
+    m_inspectedFile->setup(widget->editorDocument()->displayName(),
+                           widget->editorDocument()->filePath());
+
+    //expand "Includes"
+    m_treeView->expand(m_model->index(0, 0));
+    //expand "Included by"
+    m_treeView->expand(m_model->index(1, 0));
+
+    showIncludeHierarchy();
+}
+
+void CppIncludeHierarchyWidget::onItemClicked(const QModelIndex &index)
+{
+    const TextEditor::BaseTextEditorWidget::Link link
+            = index.data(LinkRole).value<TextEditor::BaseTextEditorWidget::Link>();
+    if (link.hasValidTarget())
+        Core::EditorManager::openEditorAt(link.targetFileName,
+                                          link.targetLine,
+                                          link.targetColumn,
+                                          Constants::CPPEDITOR_ID);
+}
+
+void CppIncludeHierarchyWidget::showNoIncludeHierarchyLabel()
+{
+    m_inspectedFile->hide();
+    m_treeView->hide();
+    m_includeHierarchyInfoLabel->show();
+}
+
+void CppIncludeHierarchyWidget::showIncludeHierarchy()
+{
+    m_inspectedFile->show();
+    m_treeView->show();
+    m_includeHierarchyInfoLabel->hide();
+}
+
+// CppIncludeHierarchyStackedWidget
+CppIncludeHierarchyStackedWidget::CppIncludeHierarchyStackedWidget(QWidget *parent) :
+    QStackedWidget(parent),
+    m_typeHiearchyWidgetInstance(new CppIncludeHierarchyWidget)
+{
+    addWidget(m_typeHiearchyWidgetInstance);
+}
+
+CppIncludeHierarchyStackedWidget::~CppIncludeHierarchyStackedWidget()
+{
+    delete m_typeHiearchyWidgetInstance;
+}
+
+// CppIncludeHierarchyFactory
+CppIncludeHierarchyFactory::CppIncludeHierarchyFactory()
+{
+}
+
+CppIncludeHierarchyFactory::~CppIncludeHierarchyFactory()
+{
+}
+
+QString CppIncludeHierarchyFactory::displayName() const
+{
+    return tr("Include Hierarchy");
+}
+
+int CppIncludeHierarchyFactory::priority() const
+{
+    return Constants::INCLUDE_HIERARCHY_PRIORITY;
+}
+
+Core::Id CppIncludeHierarchyFactory::id() const
+{
+    return Core::Id(Constants::INCLUDE_HIERARCHY_ID);
+}
+
+QKeySequence CppIncludeHierarchyFactory::activationSequence() const
+{
+    return QKeySequence();
+}
+
+Core::NavigationView CppIncludeHierarchyFactory::createWidget()
+{
+    CppIncludeHierarchyStackedWidget *w = new CppIncludeHierarchyStackedWidget;
+    static_cast<CppIncludeHierarchyWidget *>(w->currentWidget())->perform();
+    Core::NavigationView navigationView;
+    navigationView.widget = w;
+    return navigationView;
+}
+
+} // namespace Internal
+} // namespace CppEditor