CppTools: Move CppHoverHandler to CppTools

This is in preparation for clang code model to provide its own hover
handler.

Change-Id: Ifbdd96f427989bd5d1fbc4badb9c38108485c2f2
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/plugins/cpptools/cppelementevaluator.h

@@ -0,0 +1,191 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "cpptools_global.h"
+
+#include <texteditor/texteditor.h>
+#include <texteditor/helpitem.h>
+
+#include <cplusplus/CppDocument.h>
+
+#include <QString>
+#include <QStringList>
+#include <QSharedPointer>
+#include <QTextCursor>
+#include <QIcon>
+
+namespace CPlusPlus {
+class LookupItem;
+class LookupContext;
+}
+
+namespace CppTools {
+class CppElement;
+class CppModelManager;
+
+class CPPTOOLS_EXPORT CppElementEvaluator
+{
+public:
+    explicit CppElementEvaluator(TextEditor::TextEditorWidget *editor);
+
+    void setTextCursor(const QTextCursor &tc);
+    void setLookupBaseClasses(const bool lookup);
+    void setLookupDerivedClasses(const bool lookup);
+
+    void execute();
+    bool identifiedCppElement() const;
+    const QSharedPointer<CppElement> &cppElement() const;
+    bool hasDiagnosis() const;
+    const QString &diagnosis() const;
+
+private:
+    void clear();
+    void checkDiagnosticMessage(int pos);
+    bool matchIncludeFile(const CPlusPlus::Document::Ptr &document, unsigned line);
+    bool matchMacroInUse(const CPlusPlus::Document::Ptr &document, unsigned pos);
+    void handleLookupItemMatch(const CPlusPlus::Snapshot &snapshot,
+                               const CPlusPlus::LookupItem &lookupItem,
+                               const CPlusPlus::LookupContext &lookupContext,
+                               const CPlusPlus::Scope *scope);
+
+    TextEditor::TextEditorWidget *m_editor;
+    CppTools::CppModelManager *m_modelManager;
+    QTextCursor m_tc;
+    bool m_lookupBaseClasses;
+    bool m_lookupDerivedClasses;
+    QSharedPointer<CppElement> m_element;
+    QString m_diagnosis;
+};
+
+class CPPTOOLS_EXPORT CppElement
+{
+protected:
+    CppElement();
+
+public:
+    virtual ~CppElement();
+
+    TextEditor::HelpItem::Category helpCategory;
+    QStringList helpIdCandidates;
+    QString helpMark;
+    Utils::Link link;
+    QString tooltip;
+};
+
+class Unknown : public CppElement
+{
+public:
+    explicit Unknown(const QString &type);
+
+public:
+    QString type;
+};
+
+class CppInclude : public CppElement
+{
+public:
+    explicit CppInclude(const CPlusPlus::Document::Include &includeFile);
+
+public:
+    QString path;
+    QString fileName;
+};
+
+class CppMacro : public CppElement
+{
+public:
+    explicit CppMacro(const CPlusPlus::Macro &macro);
+};
+
+class CppDeclarableElement : public CppElement
+{
+public:
+    explicit CppDeclarableElement(CPlusPlus::Symbol *declaration);
+
+public:
+    CPlusPlus::Symbol *declaration;
+    QString name;
+    QString qualifiedName;
+    QString type;
+    QIcon icon;
+};
+
+class CppNamespace : public CppDeclarableElement
+{
+public:
+    explicit CppNamespace(CPlusPlus::Symbol *declaration);
+};
+
+class CppClass : public CppDeclarableElement
+{
+public:
+    CppClass();
+    explicit CppClass(CPlusPlus::Symbol *declaration);
+
+    bool operator==(const CppClass &other);
+
+    void lookupBases(CPlusPlus::Symbol *declaration, const CPlusPlus::LookupContext &context);
+    void lookupDerived(CPlusPlus::Symbol *declaration, const CPlusPlus::Snapshot &snapshot);
+
+public:
+    QList<CppClass> bases;
+    QList<CppClass> derived;
+};
+
+class CppFunction : public CppDeclarableElement
+{
+public:
+    explicit CppFunction(CPlusPlus::Symbol *declaration);
+};
+
+class CppEnum : public CppDeclarableElement
+{
+public:
+    explicit CppEnum(CPlusPlus::Enum *declaration);
+};
+
+class CppTypedef : public CppDeclarableElement
+{
+public:
+    explicit CppTypedef(CPlusPlus::Symbol *declaration);
+};
+
+class CppVariable : public CppDeclarableElement
+{
+public:
+    CppVariable(CPlusPlus::Symbol *declaration,
+                const CPlusPlus::LookupContext &context,
+                CPlusPlus::Scope *scope);
+};
+
+class CppEnumerator : public CppDeclarableElement
+{
+public:
+    explicit CppEnumerator(CPlusPlus::EnumeratorDeclaration *declaration);
+};
+
+} // namespace CppTools