cppmodelmanager.cpp 40.1 KB
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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2009 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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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** 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.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include <cplusplus/pp.h>
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#include <cplusplus/CppBindings.h>
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#include <cplusplus/Overview.h>
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#include <cplusplus/CheckUndefinedSymbols.h>
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#include "cppmodelmanager.h"
#include "cpptoolsconstants.h"
#include "cpptoolseditorsupport.h"
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#include "cppfindreferences.h"
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#include <functional>
#include <QtConcurrentRun>
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#include <QFutureSynchronizer>
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#include <qtconcurrent/runextensions.h>
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#include <texteditor/itexteditor.h>
#include <texteditor/basetexteditor.h>

#include <projectexplorer/project.h>
#include <projectexplorer/projectexplorer.h>
#include <projectexplorer/projectexplorerconstants.h>
#include <projectexplorer/session.h>

#include <coreplugin/icore.h>
#include <coreplugin/uniqueidmanager.h>
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#include <coreplugin/mimedatabase.h>
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#include <coreplugin/editormanager/editormanager.h>
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#include <coreplugin/progressmanager/progressmanager.h>
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#include <extensionsystem/pluginmanager.h>

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#include <utils/qtcassert.h>

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#include <TranslationUnit.h>
#include <Semantic.h>
#include <AST.h>
#include <Scope.h>
#include <Literals.h>
#include <Symbols.h>
#include <Names.h>
#include <NameVisitor.h>
#include <TypeVisitor.h>
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#include <ASTVisitor.h>
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#include <Lexer.h>
#include <Token.h>

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#include <cplusplus/LookupContext.h>

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#include <QtCore/QCoreApplication>
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#include <QtCore/QDebug>
#include <QtCore/QMutexLocker>
#include <QtCore/QTime>
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#include <QtCore/QTimer>
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#include <QtConcurrentMap>
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#include <iostream>
#include <sstream>
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using namespace CppTools;
using namespace CppTools::Internal;
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using namespace CPlusPlus;

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#if defined(QTCREATOR_WITH_DUMP_AST) && defined(Q_CC_GNU)

#include <cxxabi.h>

class DumpAST: protected ASTVisitor
{
public:
    int depth;

    DumpAST(Control *control)
        : ASTVisitor(control), depth(0)
    { }

    void operator()(AST *ast)
    { accept(ast); }

protected:
    virtual bool preVisit(AST *ast)
    {
        std::ostringstream s;
        PrettyPrinter pp(control(), s);
        pp(ast);
        QString code = QString::fromStdString(s.str());
        code.replace('\n', ' ');
        code.replace(QRegExp("\\s+"), " ");

        const char *name = abi::__cxa_demangle(typeid(*ast).name(), 0, 0, 0) + 11;

        QByteArray ind(depth, ' ');
        ind += name;

        printf("%-40s %s\n", ind.constData(), qPrintable(code));
        ++depth;
        return true;
    }

    virtual void postVisit(AST *)
    { --depth; }
};

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#endif // QTCREATOR_WITH_DUMP_AST
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static const char pp_configuration_file[] = "<configuration>";

static const char pp_configuration[] =
    "# 1 \"<configuration>\"\n"
    "#define __cplusplus 1\n"
    "#define __extension__\n"
    "#define __context__\n"
    "#define __range__\n"
    "#define   restrict\n"
    "#define __restrict\n"
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    "#define __restrict__\n"
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    "#define __complex__\n"
    "#define __imag__\n"
    "#define __real__\n"

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    "#define __builtin_va_arg(a,b) ((b)0)\n"

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    // ### add macros for win32
    "#define __cdecl\n"
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    "#define __stdcall\n"
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    "#define QT_WA(x) x\n"
    "#define API\n"
    "#define WINAPI\n"
    "#define CALLBACK\n"
    "#define STDMETHODCALLTYPE\n"
    "#define __RPC_FAR\n"
    "#define APIENTRY\n"
    "#define __declspec(a)\n"
    "#define STDMETHOD(method) virtual HRESULT STDMETHODCALLTYPE method\n";

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#ifndef ICHECK_BUILD
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CppPreprocessor::CppPreprocessor(QPointer<CppModelManager> modelManager)
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    : snapshot(modelManager->snapshot()),
      m_modelManager(modelManager),
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      preprocess(this, &env),
      m_revision(0)
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{ }
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#else

CppPreprocessor::CppPreprocessor(QPointer<CPlusPlus::ParseManager> modelManager)
    : preprocess(this, &env),
      m_revision(0)
{
}
#endif

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CppPreprocessor::~CppPreprocessor()
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{ }
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void CppPreprocessor::setRevision(unsigned revision)
{ m_revision = revision; }

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void CppPreprocessor::setWorkingCopy(const CppTools::CppModelManagerInterface::WorkingCopy &workingCopy)
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{ m_workingCopy = workingCopy; }
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void CppPreprocessor::setIncludePaths(const QStringList &includePaths)
{ m_includePaths = includePaths; }

void CppPreprocessor::setFrameworkPaths(const QStringList &frameworkPaths)
{ m_frameworkPaths = frameworkPaths; }
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void CppPreprocessor::setProjectFiles(const QStringList &files)
{ m_projectFiles = files; }

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void CppPreprocessor::setTodo(const QStringList &files)
{ m_todo = QSet<QString>::fromList(files); }

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namespace {
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#ifndef ICHECK_BUILD
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class Process: public std::unary_function<Document::Ptr, void>
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{
    QPointer<CppModelManager> _modelManager;
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    Snapshot _snapshot;
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    CppModelManager::WorkingCopy _workingCopy;
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    Document::Ptr _doc;
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public:
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    Process(QPointer<CppModelManager> modelManager,
            Snapshot snapshot,
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            const CppModelManager::WorkingCopy &workingCopy)
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        : _modelManager(modelManager),
          _snapshot(snapshot),
          _workingCopy(workingCopy)
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    { }

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    LookupContext lookupContext(unsigned line, unsigned column) const
    { return lookupContext(_doc->findSymbolAt(line, column)); }

    LookupContext lookupContext(Symbol *symbol) const
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    {
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        LookupContext context(symbol, Document::create(QLatin1String("<none>")), _doc, _snapshot);
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        return context;
    }

    void operator()(Document::Ptr doc)
    {
        _doc = doc;
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        Document::CheckMode mode = Document::FastCheck;

        if (_workingCopy.contains(doc->fileName()))
            mode = Document::FullCheck;

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        doc->parse();
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        doc->check(mode);
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        if (mode == Document::FullCheck) {
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            // run the binding pass
            NamespaceBindingPtr ns = bind(doc, _snapshot);

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            // check for undefined symbols.
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            CheckUndefinedSymbols checkUndefinedSymbols(doc);
            checkUndefinedSymbols.setGlobalNamespaceBinding(ns);
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            checkUndefinedSymbols(doc->translationUnit()->ast()); // ### FIXME
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        }

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        doc->releaseTranslationUnit();

        if (_modelManager)
            _modelManager->emitDocumentUpdated(doc); // ### TODO: compress
    }
};
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#endif
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} // end of anonymous namespace

void CppPreprocessor::run(const QString &fileName)
{
    QString absoluteFilePath = fileName;
    sourceNeeded(absoluteFilePath, IncludeGlobal, /*line = */ 0);
}
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void CppPreprocessor::resetEnvironment()
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{
    env.reset();
    m_processed.clear();
}
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bool CppPreprocessor::includeFile(const QString &absoluteFilePath, QString *result, unsigned *revision)
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{
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    if (absoluteFilePath.isEmpty() || m_included.contains(absoluteFilePath))
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        return true;

    if (m_workingCopy.contains(absoluteFilePath)) {
        m_included.insert(absoluteFilePath);
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        const QPair<QString, unsigned> r = m_workingCopy.get(absoluteFilePath);
        *result = r.first;
        *revision = r.second;
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        return true;
    }

    QFileInfo fileInfo(absoluteFilePath);
    if (! fileInfo.isFile())
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        return false;
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    QFile file(absoluteFilePath);
    if (file.open(QFile::ReadOnly)) {
        m_included.insert(absoluteFilePath);
        QTextStream stream(&file);
        const QString contents = stream.readAll();
        *result = contents.toUtf8();
        file.close();
        return true;
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    }

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    return false;
}

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QString CppPreprocessor::tryIncludeFile(QString &fileName, IncludeType type, unsigned *revision)
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{
    QFileInfo fileInfo(fileName);
    if (fileName == QLatin1String(pp_configuration_file) || fileInfo.isAbsolute()) {
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        QString contents;
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        includeFile(fileName, &contents, revision);
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        return contents;
    }

    if (type == IncludeLocal && m_currentDoc) {
        QFileInfo currentFileInfo(m_currentDoc->fileName());
        QString path = currentFileInfo.absolutePath();
        path += QLatin1Char('/');
        path += fileName;
        path = QDir::cleanPath(path);
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        QString contents;
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        if (includeFile(path, &contents, revision)) {
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            fileName = path;
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            return contents;
        }
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    }
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    foreach (const QString &includePath, m_includePaths) {
        QString path = includePath;
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        path += QLatin1Char('/');
        path += fileName;
        path = QDir::cleanPath(path);
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        QString contents;
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        if (includeFile(path, &contents, revision)) {
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            fileName = path;
            return contents;
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        }
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    }
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    // look in the system include paths
    foreach (const QString &includePath, m_systemIncludePaths) {
        QString path = includePath;
        path += QLatin1Char('/');
        path += fileName;
        path = QDir::cleanPath(path);
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        QString contents;
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        if (includeFile(path, &contents, revision)) {
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            fileName = path;
            return contents;
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        }
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    }

    int index = fileName.indexOf(QLatin1Char('/'));
    if (index != -1) {
        QString frameworkName = fileName.left(index);
        QString name = fileName.mid(index + 1);
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        foreach (const QString &frameworkPath, m_frameworkPaths) {
            QString path = frameworkPath;
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            path += QLatin1Char('/');
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            path += frameworkName;
            path += QLatin1String(".framework/Headers/");
            path += name;
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            path = QDir::cleanPath(path);
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            QString contents;
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            if (includeFile(path, &contents, revision)) {
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                fileName = path;
                return contents;
            }
        }
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    }
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    QString path = fileName;
    if (path.at(0) != QLatin1Char('/'))
        path.prepend(QLatin1Char('/'));
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    foreach (const QString &projectFile, m_projectFiles) {
        if (projectFile.endsWith(path)) {
            fileName = projectFile;
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            QString contents;
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            includeFile(fileName, &contents, revision);
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            return contents;
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        }
    }

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    //qDebug() << "**** file" << fileName << "not found!";
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    return QString();
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}
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void CppPreprocessor::macroAdded(const Macro &macro)
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{
    if (! m_currentDoc)
        return;
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    m_currentDoc->appendMacro(macro);
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}
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void CppPreprocessor::passedMacroDefinitionCheck(unsigned offset, const Macro &macro)
{
    if (! m_currentDoc)
        return;

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    m_currentDoc->addMacroUse(macro, offset, macro.name().length(), env.currentLine,
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                              QVector<MacroArgumentReference>(), true);
}

void CppPreprocessor::failedMacroDefinitionCheck(unsigned offset, const QByteArray &name)
{
    if (! m_currentDoc)
        return;

    m_currentDoc->addUndefinedMacroUse(name, offset);
}

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void CppPreprocessor::startExpandingMacro(unsigned offset,
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                                          const Macro &macro,
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                                          const QByteArray &originalText,
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                                          bool inCondition,
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                                          const QVector<MacroArgumentReference> &actuals)
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{
    if (! m_currentDoc)
        return;
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    //qDebug() << "start expanding:" << macro.name() << "text:" << originalText;
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    m_currentDoc->addMacroUse(macro, offset, originalText.length(), env.currentLine,
                              actuals, inCondition);
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}
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void CppPreprocessor::stopExpandingMacro(unsigned, const Macro &)
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{
    if (! m_currentDoc)
        return;
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    //qDebug() << "stop expanding:" << macro.name;
}
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void CppPreprocessor::mergeEnvironment(Document::Ptr doc)
{
    if (! doc)
        return;
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    const QString fn = doc->fileName();
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    if (m_processed.contains(fn))
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        return;
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    m_processed.insert(fn);
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    foreach (const Document::Include &incl, doc->includes()) {
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        QString includedFile = incl.fileName();

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        if (Document::Ptr includedDoc = snapshot.document(includedFile))
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            mergeEnvironment(includedDoc);
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        else
            run(includedFile);
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    }
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    env.addMacros(doc->definedMacros());
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}
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void CppPreprocessor::startSkippingBlocks(unsigned offset)
{
    //qDebug() << "start skipping blocks:" << offset;
    if (m_currentDoc)
        m_currentDoc->startSkippingBlocks(offset);
}

void CppPreprocessor::stopSkippingBlocks(unsigned offset)
{
    //qDebug() << "stop skipping blocks:" << offset;
    if (m_currentDoc)
        m_currentDoc->stopSkippingBlocks(offset);
}

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void CppPreprocessor::sourceNeeded(QString &fileName, IncludeType type, unsigned line)
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{
    if (fileName.isEmpty())
        return;

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    unsigned editorRevision = 0;
    QString contents = tryIncludeFile(fileName, type, &editorRevision);
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    fileName = QDir::cleanPath(fileName);
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    if (m_currentDoc) {
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        m_currentDoc->addIncludeFile(fileName, line);
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        if (contents.isEmpty() && ! QFileInfo(fileName).isAbsolute()) {
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            QString msg = QCoreApplication::translate(
                    "CppPreprocessor", "%1: No such file or directory").arg(fileName);
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            Document::DiagnosticMessage d(Document::DiagnosticMessage::Warning,
                                          m_currentDoc->fileName(),
                                          env.currentLine, /*column = */ 0,
                                          msg);
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            m_currentDoc->addDiagnosticMessage(d);
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            //qWarning() << "file not found:" << fileName << m_currentDoc->fileName() << env.current_line;
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        }
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    }
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    //qDebug() << "parse file:" << fileName << "contents:" << contents.size();
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    Document::Ptr doc = snapshot.document(fileName);
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    if (doc) {
        mergeEnvironment(doc);
        return;
    }
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    doc = Document::create(fileName);
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    doc->setRevision(m_revision);
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    doc->setEditorRevision(editorRevision);
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    QFileInfo info(fileName);
    if (info.exists())
        doc->setLastModified(info.lastModified());

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    Document::Ptr previousDoc = switchDocument(doc);
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    const QByteArray preprocessedCode = preprocess(fileName, contents);
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    doc->setSource(preprocessedCode);
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    doc->tokenize();
    doc->releaseSource();
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    snapshot.insert(doc);
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    m_todo.remove(fileName);
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#ifndef ICHECK_BUILD
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    Process process(m_modelManager, snapshot, m_workingCopy);
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    process(doc);
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    (void) switchDocument(previousDoc);
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#else
    (void) switchDocument(previousDoc);
    Document::CheckMode mode = Document::FastCheck;
    mode = Document::FullCheck;
    doc->parse();
    doc->check(mode);
#endif
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}
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Document::Ptr CppPreprocessor::switchDocument(Document::Ptr doc)
{
    Document::Ptr previousDoc = m_currentDoc;
    m_currentDoc = doc;
    return previousDoc;
}
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#ifndef ICHECK_BUILD
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void CppTools::CppModelManagerInterface::updateModifiedSourceFiles()
{
    const Snapshot snapshot = this->snapshot();
    QStringList sourceFiles;

    foreach (const Document::Ptr doc, snapshot) {
        const QDateTime lastModified = doc->lastModified();

        if (! lastModified.isNull()) {
            QFileInfo fileInfo(doc->fileName());

            if (fileInfo.exists() && fileInfo.lastModified() != lastModified)
                sourceFiles.append(doc->fileName());
        }
    }

    updateSourceFiles(sourceFiles);
}

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CppTools::CppModelManagerInterface *CppTools::CppModelManagerInterface::instance()
{
    ExtensionSystem::PluginManager *pluginManager = ExtensionSystem::PluginManager::instance();
    return pluginManager->getObject<CppTools::CppModelManagerInterface>();

}

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/*!
    \class CppTools::CppModelManager
    \brief The CppModelManager keeps track of one CppCodeModel instance
           for each project and all related CppCodeModelPart instances.

    It also takes care of updating the code models when C++ files are
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    modified within Qt Creator.
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*/

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CppModelManager::CppModelManager(QObject *parent)
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    : CppModelManagerInterface(parent)
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{
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    m_findReferences = new CppFindReferences(this);
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    m_indexerEnabled = qgetenv("QTCREATOR_NO_CODE_INDEXER").isNull();
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    m_revision = 0;
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    m_synchronizer.setCancelOnWait(true);

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    m_core = Core::ICore::instance(); // FIXME
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    m_dirty = true;

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    ProjectExplorer::ProjectExplorerPlugin *pe =
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       ProjectExplorer::ProjectExplorerPlugin::instance();
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    QTC_ASSERT(pe, return);
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    ProjectExplorer::SessionManager *session = pe->session();
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    QTC_ASSERT(session, return);
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    m_updateEditorSelectionsTimer = new QTimer(this);
    m_updateEditorSelectionsTimer->setInterval(500);
    m_updateEditorSelectionsTimer->setSingleShot(true);
    connect(m_updateEditorSelectionsTimer, SIGNAL(timeout()),
            this, SLOT(updateEditorSelections()));

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    connect(session, SIGNAL(projectAdded(ProjectExplorer::Project*)),
            this, SLOT(onProjectAdded(ProjectExplorer::Project*)));

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    connect(session, SIGNAL(aboutToRemoveProject(ProjectExplorer::Project *)),
            this, SLOT(onAboutToRemoveProject(ProjectExplorer::Project *)));

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    connect(session, SIGNAL(aboutToUnloadSession()),
            this, SLOT(onAboutToUnloadSession()));
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    qRegisterMetaType<CPlusPlus::Document::Ptr>("CPlusPlus::Document::Ptr");

    // thread connections
    connect(this, SIGNAL(documentUpdated(CPlusPlus::Document::Ptr)),
            this, SLOT(onDocumentUpdated(CPlusPlus::Document::Ptr)));

    // Listen for editor closed and opened events so that we can keep track of changing files
    connect(m_core->editorManager(), SIGNAL(editorOpened(Core::IEditor *)),
        this, SLOT(editorOpened(Core::IEditor *)));

    connect(m_core->editorManager(), SIGNAL(editorAboutToClose(Core::IEditor *)),
        this, SLOT(editorAboutToClose(Core::IEditor *)));
}

CppModelManager::~CppModelManager()
{ }

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Snapshot CppModelManager::snapshot() const
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{
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    QMutexLocker locker(&protectSnapshot);
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    return m_snapshot;
}
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void CppModelManager::ensureUpdated()
{
    QMutexLocker locker(&mutex);
    if (! m_dirty)
        return;

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    m_projectFiles = internalProjectFiles();
    m_includePaths = internalIncludePaths();
    m_frameworkPaths = internalFrameworkPaths();
    m_definedMacros = internalDefinedMacros();
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    m_dirty = false;
}

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QStringList CppModelManager::internalProjectFiles() const
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{
    QStringList files;
    QMapIterator<ProjectExplorer::Project *, ProjectInfo> it(m_projects);
    while (it.hasNext()) {
        it.next();
        ProjectInfo pinfo = it.value();
        files += pinfo.sourceFiles;
    }
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    files.removeDuplicates();
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    return files;
}

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QStringList CppModelManager::internalIncludePaths() const
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{
    QStringList includePaths;
    QMapIterator<ProjectExplorer::Project *, ProjectInfo> it(m_projects);
    while (it.hasNext()) {
        it.next();
        ProjectInfo pinfo = it.value();
        includePaths += pinfo.includePaths;
    }
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    includePaths.removeDuplicates();
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    return includePaths;
}

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QStringList CppModelManager::internalFrameworkPaths() const
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{
    QStringList frameworkPaths;
    QMapIterator<ProjectExplorer::Project *, ProjectInfo> it(m_projects);
    while (it.hasNext()) {
        it.next();
        ProjectInfo pinfo = it.value();
        frameworkPaths += pinfo.frameworkPaths;
    }
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    frameworkPaths.removeDuplicates();
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    return frameworkPaths;
}

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QByteArray CppModelManager::internalDefinedMacros() const
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{
    QByteArray macros;
    QMapIterator<ProjectExplorer::Project *, ProjectInfo> it(m_projects);
    while (it.hasNext()) {
        it.next();
        ProjectInfo pinfo = it.value();
        macros += pinfo.defines;
    }
    return macros;
}

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void CppModelManager::setIncludesInPaths(const QMap<QString, QStringList> &includesInPaths)
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{
    QMutexLocker locker(&mutex);
    QMapIterator<QString, QStringList> i(includesInPaths);
    while (i.hasNext()) {
        i.next();
        m_includesInPaths.insert(i.key(), i.value());
    }
}

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void CppModelManager::addEditorSupport(AbstractEditorSupport *editorSupport)
{
    m_addtionalEditorSupport.insert(editorSupport);
}

void CppModelManager::removeEditorSupport(AbstractEditorSupport *editorSupport)
{
    m_addtionalEditorSupport.remove(editorSupport);
}

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QList<int> CppModelManager::references(CPlusPlus::Symbol *symbol,
                                       CPlusPlus::Document::Ptr doc,
                                       const CPlusPlus::Snapshot &snapshot)
{
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    NamespaceBindingPtr glo = bind(doc, snapshot);
    return m_findReferences->references(LookupContext::canonicalSymbol(symbol, glo.data()), doc, snapshot);
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}

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void CppModelManager::findUsages(CPlusPlus::Symbol *symbol)
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{
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    if (symbol->identifier())
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        m_findReferences->findUsages(symbol);
}

void CppModelManager::renameUsages(CPlusPlus::Symbol *symbol)
{
    if (symbol->identifier())
        m_findReferences->renameUsages(symbol);
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}

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void CppModelManager::findMacroUsages(const CPlusPlus::Macro &macro)
{
    m_findReferences->findMacroUses(macro);
}

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CppModelManager::WorkingCopy CppModelManager::buildWorkingCopyList()
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{
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    WorkingCopy workingCopy;
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    QMapIterator<TextEditor::ITextEditor *, CppEditorSupport *> it(m_editorSupport);
    while (it.hasNext()) {
        it.next();
        TextEditor::ITextEditor *textEditor = it.key();
        CppEditorSupport *editorSupport = it.value();
        QString fileName = textEditor->file()->fileName();
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        workingCopy.insert(fileName, editorSupport->contents(), editorSupport->editorRevision());
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    }

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    QSetIterator<AbstractEditorSupport *> jt(m_addtionalEditorSupport);
    while (jt.hasNext()) {
        AbstractEditorSupport *es =  jt.next();
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        workingCopy.insert(es->fileName(), es->contents());
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    }

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    // add the project configuration file
    QByteArray conf(pp_configuration);
    conf += definedMacros();
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    workingCopy.insert(pp_configuration_file, conf);
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    return workingCopy;
}

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CppModelManager::WorkingCopy CppModelManager::workingCopy() const
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{
    return const_cast<CppModelManager *>(this)->buildWorkingCopyList();
}

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void CppModelManager::updateSourceFiles(const QStringList &sourceFiles)
{ (void) refreshSourceFiles(sourceFiles); }

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QList<CppModelManager::ProjectInfo> CppModelManager::projectInfos() const
{
    QMutexLocker locker(&mutex);

    return m_projects.values();
}

CppModelManager::ProjectInfo CppModelManager::projectInfo(ProjectExplorer::Project *project) const
{
    QMutexLocker locker(&mutex);

    return m_projects.value(project, ProjectInfo(project));
}

void CppModelManager::updateProjectInfo(const ProjectInfo &pinfo)
{
    QMutexLocker locker(&mutex);

    if (! pinfo.isValid())
        return;

    m_projects.insert(pinfo.project, pinfo);
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    m_dirty = true;
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    if (m_indexerEnabled) {
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        QFuture<void> result = QtConcurrent::run(&CppModelManager::updateIncludesInPaths,
                                                 this,
                                                 pinfo.includePaths,
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                                                 pinfo.frameworkPaths,
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                                                 m_headerSuffixes);

        if (pinfo.includePaths.size() > 1) {
            m_core->progressManager()->addTask(result, tr("Scanning"),
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                                               CppTools::Constants::TASK_INDEX);
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        }
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    }
}

QStringList CppModelManager::includesInPath(const QString &path) const
{
    QMutexLocker locker(&mutex);
    return m_includesInPaths.value(path);
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}
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QFuture<void> CppModelManager::refreshSourceFiles(const QStringList &sourceFiles)
{
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    if (! sourceFiles.isEmpty() && m_indexerEnabled) {
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        const WorkingCopy workingCopy = buildWorkingCopyList();
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        CppPreprocessor *preproc = new CppPreprocessor(this);
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        preproc->setRevision(++m_revision);
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        preproc->setProjectFiles(projectFiles());
        preproc->setIncludePaths(includePaths());
        preproc->setFrameworkPaths(frameworkPaths());
        preproc->setWorkingCopy(workingCopy);

        QFuture<void> result = QtConcurrent::run(&CppModelManager::parse,
                                                 preproc, sourceFiles);
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        if (m_synchronizer.futures().size() > 10) {
            QList<QFuture<void> > futures = m_synchronizer.futures();

            m_synchronizer.clearFutures();

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            foreach (const QFuture<void> &future, futures) {
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                if (! (future.isFinished() || future.isCanceled()))
                    m_synchronizer.addFuture(future);
            }
        }

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        m_synchronizer.addFuture(result);

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        if (sourceFiles.count() > 1) {
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            m_core->progressManager()->addTask(result, tr("Indexing"),
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                            CppTools::Constants::TASK_INDEX);
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        }
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        return result;
    }
    return QFuture<void>();
}

/*!
    \fn    void CppModelManager::editorOpened(Core::IEditor *editor)
    \brief If a C++ editor is opened, the model manager listens to content changes
           in order to update the CppCodeModel accordingly. It also updates the
           CppCodeModel for the first time with this editor.

    \sa    void CppModelManager::editorContentsChanged()
 */
void CppModelManager::editorOpened(Core::IEditor *editor)
{
    if (isCppEditor(editor)) {
        TextEditor::ITextEditor *textEditor = qobject_cast<TextEditor::ITextEditor *>(editor);
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        QTC_ASSERT(textEditor, return);
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        CppEditorSupport *editorSupport = new CppEditorSupport(this);
        editorSupport->setTextEditor(textEditor);
        m_editorSupport[textEditor] = editorSupport;
    }
}

void CppModelManager::editorAboutToClose(Core::IEditor *editor)
{
    if (isCppEditor(editor)) {
        TextEditor::ITextEditor *textEditor = qobject_cast<TextEditor::ITextEditor *>(editor);
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        QTC_ASSERT(textEditor, return);
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        CppEditorSupport *editorSupport = m_editorSupport.value(textEditor);
        m_editorSupport.remove(textEditor);
        delete editorSupport;
    }
}

bool CppModelManager::isCppEditor(Core::IEditor *editor) const
{
    Core::UniqueIDManager *uidm = m_core->uniqueIDManager();
    const int uid = uidm->uniqueIdentifier(ProjectExplorer::Constants::LANG_CXX);
    return editor->context().contains(uid);
}

void CppModelManager::emitDocumentUpdated(Document::Ptr doc)
{ emit documentUpdated(doc); }

void CppModelManager::onDocumentUpdated(Document::Ptr doc)
{
    const QString fileName = doc->fileName();
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    bool outdated = false;

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    protectSnapshot.lock();
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    Document::Ptr previous = m_snapshot.document(fileName);
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    if (previous && (doc->revision() != 0 && doc->revision() < previous->revision()))
        outdated = true;
    else
        m_snapshot.insert(doc);

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    protectSnapshot.unlock();

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    if (outdated)
        return;

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    QList<Core::IEditor *> openedEditors = m_core->editorManager()->openedEditors();
    foreach (Core::IEditor *editor, openedEditors) {
        if (editor->file()->fileName() == fileName) {
            TextEditor::ITextEditor *textEditor = qobject_cast<TextEditor::ITextEditor *>(editor);
            if (! textEditor)
                continue;

            TextEditor::BaseTextEditor *ed = qobject_cast<TextEditor::BaseTextEditor *>(textEditor->widget());
            if (! ed)
                continue;

            QList<TextEditor::BaseTextEditor::BlockRange> blockRanges;

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            foreach (const Document::Block &block, doc->skippedBlocks()) {
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                blockRanges.append(TextEditor::BaseTextEditor::BlockRange(block.begin(), block.end()));
            }

            QList<QTextEdit::ExtraSelection> selections;

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#ifdef QTCREATOR_WITH_MACRO_HIGHLIGHTING
            // set up the format for the macros
            QTextCharFormat macroFormat;
            macroFormat.setUnderlineStyle(QTextCharFormat::SingleUnderline);

            QTextCursor c = ed->textCursor();
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            foreach (const Document::MacroUse &block, doc->macroUses()) {
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                QTextEdit::ExtraSelection sel;
                sel.cursor = c;
                sel.cursor.setPosition(block.begin());
                sel.cursor.setPosition(block.end(), QTextCursor::KeepAnchor);
                sel.format = macroFormat;
                selections.append(sel);
            }
#endif // QTCREATOR_WITH_MACRO_HIGHLIGHTING

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            // set up the format for the errors
            QTextCharFormat errorFormat;
            errorFormat.setUnderlineStyle(QTextCharFormat::WaveUnderline);
            errorFormat.setUnderlineColor(Qt::red);

            // set up the format for the warnings.
            QTextCharFormat warningFormat;
            warningFormat.setUnderlineStyle(QTextCharFormat::WaveUnderline);
            warningFormat.setUnderlineColor(Qt::darkYellow);

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#ifdef QTCREATOR_WITH_ADVANCED_HIGHLIGHTER
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            QSet<QPair<unsigned, unsigned> > lines;
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            foreach (const Document::DiagnosticMessage &m, doc->diagnosticMessages()) {
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                if (m.fileName() != fileName)
                    continue;
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                const QPair<unsigned, unsigned> coordinates = qMakePair(m.line(), m.column());

                if (lines.contains(coordinates))
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                    continue;

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                lines.insert(coordinates);
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                QTextEdit::ExtraSelection sel;
                if (m.isWarning())
                    sel.format = warningFormat;
                else
                    sel.format = errorFormat;

                QTextCursor c(ed->document()->findBlockByNumber(m.line() - 1));
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                // ### check for generated tokens.

                int column = m.column();

                if (column > c.block().length()) {
                    column = 0;

                    const QString text = c.block().text();
                    for (int i = 0; i < text.size(); ++i) {
                        if (! text.at(i).isSpace()) {
                            ++column;
                            break;
                        }
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                    }
                }