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#ifndef SEARCHSYMBOLS_H
#define SEARCHSYMBOLS_H

#include "cpptools_global.h"
#include "cppindexingsupport.h"

#include <cplusplus/CppDocument.h>
#include <cplusplus/Icons.h>
#include <cplusplus/Overview.h>

#include <utils/fileutils.h>

#include <QIcon>
#include <QString>
#include <QSet>
#include <QHash>

#include <functional>

namespace CppTools {

struct CPPTOOLS_EXPORT ModelItemInfo
{
    enum ItemType { Enum, Class, Function, Declaration };

    ModelItemInfo()
        : type(Declaration),
          line(0),
          column(0)
    { }

    ModelItemInfo(const QString &symbolName,
                  const QString &symbolType,
                  const QString &symbolScope,
                  ItemType type,
                  const QString &fileName,
                  int line,
                  int column,
                  const QIcon &icon)
        : symbolName(symbolName),
          symbolType(symbolType),
          symbolScope(symbolScope),
          fileName(fileName),
          icon(icon),
          type(type),
          line(line),
          column(column)
    { }

    ModelItemInfo(const ModelItemInfo &otherInfo)
        : symbolName(otherInfo.symbolName),
          symbolType(otherInfo.symbolType),
          symbolScope(otherInfo.symbolScope),
          fileName(otherInfo.fileName),
          icon(otherInfo.icon),
          type(otherInfo.type),
          line(otherInfo.line),
          column(otherInfo.column)
    { }

    QString scopedSymbolName() const
    {
        return symbolScope.isEmpty()
                ? symbolName
                : symbolScope +  QLatin1String("::") + symbolName;
    }

    bool unqualifiedNameAndScope(const QString &defaultName, QString *name, QString *scope) const
    {
        *name = defaultName;
        *scope = symbolScope;
        const QString qualifiedName = scopedSymbolName();
        const int colonColonPosition = qualifiedName.lastIndexOf(QLatin1String("::"));
        if (colonColonPosition != -1) {
            *name = qualifiedName.mid(colonColonPosition + 2);
            *scope = qualifiedName.left(colonColonPosition);
            return true;
        }
        return false;
    }

    static QString representDeclaration(const QString &name, const QString &type)
    {
        if (type.isEmpty())
            return QString();

        const QString padding = type.endsWith(QLatin1Char('*'))
            ? QString()
            : QString(QLatin1Char(' '));
        return type + padding + name;
    }

    QString shortNativeFilePath() const
    { return Utils::FileUtils::shortNativePath(Utils::FileName::fromString(fileName)); }

    QString symbolName; // as found in the code, therefore might be qualified
    QString symbolType;
    QString symbolScope;
    QString fileName;
    QIcon icon;
    ItemType type;
    int line;
    int column;
};

class SearchSymbols: public std::binary_function<CPlusPlus::Document::Ptr, int, QList<ModelItemInfo> >,
                     protected CPlusPlus::SymbolVisitor
{
public:
    typedef SymbolSearcher::SymbolTypes SymbolTypes;

    static SymbolTypes AllTypes;

    SearchSymbols();

    void setSymbolsToSearchFor(SymbolTypes types);

    QList<ModelItemInfo> operator()(CPlusPlus::Document::Ptr doc, int sizeHint = 500)
    { return operator()(doc, sizeHint, QString()); }

    QList<ModelItemInfo> operator()(CPlusPlus::Document::Ptr doc, int sizeHint, const QString &scope);

protected:
    using SymbolVisitor::visit;

    void accept(CPlusPlus::Symbol *symbol)
    { CPlusPlus::Symbol::visitSymbol(symbol, this); }

    QString switchScope(const QString &scope);

    virtual bool visit(CPlusPlus::UsingNamespaceDirective *);
    virtual bool visit(CPlusPlus::UsingDeclaration *);
    virtual bool visit(CPlusPlus::NamespaceAlias *);
    virtual bool visit(CPlusPlus::Declaration *);
    virtual bool visit(CPlusPlus::Argument *);
    virtual bool visit(CPlusPlus::TypenameArgument *);
    virtual bool visit(CPlusPlus::BaseClass *);
    virtual bool visit(CPlusPlus::Enum *);
    virtual bool visit(CPlusPlus::Function *);
    virtual bool visit(CPlusPlus::Namespace *);
    virtual bool visit(CPlusPlus::Template *);
    virtual bool visit(CPlusPlus::Class *);
    virtual bool visit(CPlusPlus::Block *);
    virtual bool visit(CPlusPlus::ForwardClassDeclaration *);

    // Objective-C
    virtual bool visit(CPlusPlus::ObjCBaseClass *);
    virtual bool visit(CPlusPlus::ObjCBaseProtocol *);
    virtual bool visit(CPlusPlus::ObjCClass *);
    virtual bool visit(CPlusPlus::ObjCForwardClassDeclaration *);
    virtual bool visit(CPlusPlus::ObjCProtocol *);
    virtual bool visit(CPlusPlus::ObjCForwardProtocolDeclaration *);
    virtual bool visit(CPlusPlus::ObjCMethod *);
    virtual bool visit(CPlusPlus::ObjCPropertyDeclaration *);

    QString scopedSymbolName(const QString &symbolName) const;
    QString scopedSymbolName(const CPlusPlus::Symbol *symbol) const;
    QString symbolName(const CPlusPlus::Symbol *symbol) const;
    void appendItem(const QString &symbolName,
                    const QString &symbolType,
                    const QString &symbolScope,
                    ModelItemInfo::ItemType type,
                    CPlusPlus::Symbol *symbol);

private:
    QString findOrInsert(const QString &s)
    { return *strings.insert(s); }

    QSet<QString> strings;            // Used to avoid QString duplication

    QString _scope;
    CPlusPlus::Overview overview;
    CPlusPlus::Icons icons;
    QList<ModelItemInfo> items;
    SymbolTypes symbolsToSearchFor;
    QHash<const CPlusPlus::StringLiteral *, QString> m_paths;
};

} // namespace CppTools

Q_DECLARE_OPERATORS_FOR_FLAGS(CppTools::SearchSymbols::SymbolTypes)
Q_DECLARE_METATYPE(CppTools::ModelItemInfo)

#endif // SEARCHSYMBOLS_H
