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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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**
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** GNU Lesser General Public License Usage
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**
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** 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.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**************************************************************************/
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#ifndef CPPMODELMANAGER_H
#define CPPMODELMANAGER_H

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#include "cpptools_global.h"
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#include "cpptoolsconstants.h"
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#include <cplusplus/ModelManagerInterface.h>
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#ifndef ICHECK_BUILD
#  include <projectexplorer/project.h>
#endif
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#include <cplusplus/CppDocument.h>
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#include <cplusplus/PreprocessorClient.h>
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#ifndef ICHECK_BUILD
#  include <texteditor/basetexteditor.h>
#endif
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#include <cplusplus/PreprocessorEnvironment.h>
#include <cplusplus/pp-engine.h>
#ifdef ICHECK_BUILD
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#  include "parsemanager.h"
#else
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#  include <QHash>
#  include <QFutureInterface>
#  include <QFutureSynchronizer>
#  include <QMutex>
#  include <QTimer>
#  include <QTextEdit> // for QTextEdit::ExtraSelection
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#endif
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namespace Core {
class IEditor;
}

namespace TextEditor {
class ITextEditor;
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class BaseTextEditorWidget;
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}

namespace ProjectExplorer {
class ProjectExplorerPlugin;
}

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namespace CPlusPlus {
    class ParseManager;
}

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namespace CppTools {
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namespace Internal {

class CppEditorSupport;
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class CppPreprocessor;
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class CppFindReferences;
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#ifndef ICHECK_BUILD
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class CPPTOOLS_EXPORT CppModelManager : public CPlusPlus::CppModelManagerInterface
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{
    Q_OBJECT

public:
    CppModelManager(QObject *parent);
    virtual ~CppModelManager();

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    static CppModelManager *instance();

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    virtual QFuture<void> updateSourceFiles(const QStringList &sourceFiles);
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    virtual WorkingCopy workingCopy() const;
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    virtual QList<ProjectInfo> projectInfos() const;
    virtual ProjectInfo projectInfo(ProjectExplorer::Project *project) const;
    virtual void updateProjectInfo(const ProjectInfo &pinfo);
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    virtual QList<ProjectPart::Ptr> projectPart(const QString &fileName) const;
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    virtual CPlusPlus::Snapshot snapshot() const;
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    virtual void GC();

    QFuture<void> refreshSourceFiles(const QStringList &sourceFiles);

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    virtual bool isCppEditor(Core::IEditor *editor) const;
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    CppEditorSupport *editorSupport(TextEditor::ITextEditor *editor) const
    { return m_editorSupport.value(editor); }

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    void emitDocumentUpdated(CPlusPlus::Document::Ptr doc);

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    void stopEditorSelectionsUpdate()
    { m_updateEditorSelectionsTimer->stop(); }

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    virtual void addEditorSupport(AbstractEditorSupport *editorSupport);
    virtual void removeEditorSupport(AbstractEditorSupport *editorSupport);

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    virtual QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
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    virtual void renameUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context,
                              const QString &replacement = QString());
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    virtual void findUsages(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
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    virtual void findMacroUsages(const CPlusPlus::Macro &macro);

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    virtual void setExtraDiagnostics(const QString &fileName, int key,
                                     const QList<CPlusPlus::Document::DiagnosticMessage> &diagnostics);
    virtual QList<CPlusPlus::Document::DiagnosticMessage> extraDiagnostics(
            const QString &fileName, int key = AllExtraDiagnostics) const;

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    void finishedRefreshingSourceFiles(const QStringList &files);

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    virtual CppCompletionSupport *completionSupport(Core::IEditor *editor) const;
    virtual CppHighlightingSupport *highlightingSupport(Core::IEditor *editor) const;

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Q_SIGNALS:
    void projectPathChanged(const QString &projectPath);

    void aboutToRemoveFiles(const QStringList &files);

public Q_SLOTS:
    void editorOpened(Core::IEditor *editor);
    void editorAboutToClose(Core::IEditor *editor);
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    virtual void updateModifiedSourceFiles();
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private Q_SLOTS:
    // this should be executed in the GUI thread.
    void onDocumentUpdated(CPlusPlus::Document::Ptr doc);
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    void onExtraDiagnosticsUpdated(const QString &fileName);
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    void onAboutToRemoveProject(ProjectExplorer::Project *project);
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    void onAboutToUnloadSession();
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    void onProjectAdded(ProjectExplorer::Project *project);
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    void postEditorUpdate();
    void updateEditorSelections();
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private:
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    void updateEditor(CPlusPlus::Document::Ptr doc);

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    WorkingCopy buildWorkingCopyList();
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    QStringList projectFiles()
    {
        ensureUpdated();
        return m_projectFiles;
    }

    QStringList includePaths()
    {
        ensureUpdated();
        return m_includePaths;
    }

    QStringList frameworkPaths()
    {
        ensureUpdated();
        return m_frameworkPaths;
    }

    QByteArray definedMacros()
    {
        ensureUpdated();
        return m_definedMacros;
    }

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    void ensureUpdated();
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    QStringList internalProjectFiles() const;
    QStringList internalIncludePaths() const;
    QStringList internalFrameworkPaths() const;
    QByteArray internalDefinedMacros() const;
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    static void parse(QFutureInterface<void> &future,
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                      CppPreprocessor *preproc,
                      QStringList files);
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private:
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    CPlusPlus::Snapshot m_snapshot;
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    // cache
    bool m_dirty;
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    QStringList m_projectFiles;
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    QStringList m_includePaths;
    QStringList m_frameworkPaths;
    QByteArray m_definedMacros;
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    // editor integration
    QMap<TextEditor::ITextEditor *, CppEditorSupport *> m_editorSupport;

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    QSet<AbstractEditorSupport *> m_addtionalEditorSupport;

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    // project integration
    QMap<ProjectExplorer::Project *, ProjectInfo> m_projects;

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    mutable QMutex mutex;
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    mutable QMutex protectSnapshot;
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    struct Editor {
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        Editor()
                : revision(-1) {}
        int revision;
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        QPointer<TextEditor::ITextEditor> textEditor;
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        QList<QTextEdit::ExtraSelection> selections;
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        QList<TextEditor::BaseTextEditorWidget::BlockRange> ifdefedOutBlocks;
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    };

    QList<Editor> m_todo;

    QTimer *m_updateEditorSelectionsTimer;
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    QFutureSynchronizer<void> m_synchronizer;
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    unsigned m_revision;
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    CppFindReferences *m_findReferences;
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    bool m_indexerEnabled;
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    mutable QMutex protectExtraDiagnostics;
    QHash<QString, QHash<int, QList<CPlusPlus::Document::DiagnosticMessage> > > m_extraDiagnostics;
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    QMap<QString, QList<ProjectPart::Ptr> > m_srcToProjectPart;
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};
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#endif

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class CPPTOOLS_EXPORT CppPreprocessor: public CPlusPlus::Client
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{
public:
#ifndef ICHECK_BUILD
    CppPreprocessor(QPointer<CppModelManager> modelManager);
#else
    CppPreprocessor(QPointer<CPlusPlus::ParseManager> modelManager);
#endif
    virtual ~CppPreprocessor();

    void setRevision(unsigned revision);
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    void setWorkingCopy(const CPlusPlus::CppModelManagerInterface::WorkingCopy &workingCopy);
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    void setIncludePaths(const QStringList &includePaths);
    void setFrameworkPaths(const QStringList &frameworkPaths);
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    void addFrameworkPath(const QString &frameworkPath);
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    void setProjectFiles(const QStringList &files);
    void setTodo(const QStringList &files);

    void run(const QString &fileName);

    void resetEnvironment();

    const QSet<QString> &todo() const
    { return m_todo; }

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    CppModelManager *modelManager() const
    { return m_modelManager.data(); }

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public: // attributes
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    CPlusPlus::Snapshot snapshot;
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protected:
    CPlusPlus::Document::Ptr switchDocument(CPlusPlus::Document::Ptr doc);

    bool includeFile(const QString &absoluteFilePath, QString *result, unsigned *revision);
    QString tryIncludeFile(QString &fileName, IncludeType type, unsigned *revision);
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    QString tryIncludeFile_helper(QString &fileName, IncludeType type, unsigned *revision);
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    void mergeEnvironment(CPlusPlus::Document::Ptr doc);

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    virtual void macroAdded(const CPlusPlus::Macro &macro);
    virtual void passedMacroDefinitionCheck(unsigned offset, const CPlusPlus::Macro &macro);
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    virtual void failedMacroDefinitionCheck(unsigned offset, const QByteArray &name);
    virtual void startExpandingMacro(unsigned offset,
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                                     const CPlusPlus::Macro &macro,
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                                     const QByteArray &originalText,
                                     bool inCondition,
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                                     const QVector<CPlusPlus::MacroArgumentReference> &actuals);
    virtual void stopExpandingMacro(unsigned offset, const CPlusPlus::Macro &macro);
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    virtual void startSkippingBlocks(unsigned offset);
    virtual void stopSkippingBlocks(unsigned offset);
    virtual void sourceNeeded(QString &fileName, IncludeType type,
                              unsigned line);

private:
#ifndef ICHECK_BUILD
    QPointer<CppModelManager> m_modelManager;
#endif
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    CPlusPlus::Environment env;
    CPlusPlus::Preprocessor preprocess;
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    QStringList m_includePaths;
    QStringList m_systemIncludePaths;
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    CPlusPlus::CppModelManagerInterface::WorkingCopy m_workingCopy;
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    QStringList m_projectFiles;
    QStringList m_frameworkPaths;
    QSet<QString> m_included;
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    CPlusPlus::Document::Ptr m_currentDoc;
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    QSet<QString> m_todo;
    QSet<QString> m_processed;
    unsigned m_revision;
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    QHash<QString, QString> m_fileNameCache;
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};
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} // namespace Internal
} // namespace CppTools

#endif // CPPMODELMANAGER_H