clangcompletioncontextanalyzer.h 3.03 KB
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/****************************************************************************
**
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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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**
** 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
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** 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.
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**
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** 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
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**
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#pragma once
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#include <cplusplus/Token.h>

#include <QString>

namespace TextEditor { class AssistInterface; }

namespace ClangCodeModel {
namespace Internal {

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class ClangCompletionAssistInterface;

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class ClangCompletionContextAnalyzer
{
public:
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    ClangCompletionContextAnalyzer(const ClangCompletionAssistInterface *assistInterface,
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                                   CPlusPlus::LanguageFeatures languageFeatures);
    void analyze();

    enum CompletionAction {
        PassThroughToLibClang,
        PassThroughToLibClangAfterLeftParen,
        CompleteDoxygenKeyword,
        CompleteIncludePath,
        CompletePreprocessorDirective,
        CompleteSignal,
        CompleteSlot
    };
    CompletionAction completionAction() const { return m_completionAction; }
    unsigned completionOperator() const { return m_completionOperator; }
    int positionForProposal() const { return m_positionForProposal; }
    int positionForClang() const { return m_positionForClang; }
    int positionEndOfExpression() const { return m_positionEndOfExpression; }

private:
    ClangCompletionContextAnalyzer();

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    bool looksLikeAFunctionCall(int endOfExpression) const;
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    void setActionAndClangPosition(CompletionAction action, int position);
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    void setAction(CompletionAction action);

    bool handleNonFunctionCall(int position);
    void handleCommaInFunctionCall();
    void handleFunctionCall(int endOfOperator);
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private:
    const ClangCompletionAssistInterface *m_interface; // Not owned
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    const CPlusPlus::LanguageFeatures m_languageFeatures; // TODO: Get from assistInterface?!

    // Results
    CompletionAction m_completionAction = PassThroughToLibClang;
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    CPlusPlus::Kind m_completionOperator = CPlusPlus::T_EOF_SYMBOL;
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    int m_positionForProposal = -1;
    int m_positionForClang = -1;
    int m_positionEndOfExpression = -1;
};

} // namespace Internal
} // namespace ClangCodeModel