clangactivationsequencecontextprocessor.h 2.99 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
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
****************************************************************************/

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#pragma once
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#include <clangcodemodel/clangcompletionassistinterface.h>

#include <cplusplus/Token.h>

#include <QTextCursor>

QT_BEGIN_NAMESPACE
class QTextDocument;
QT_END_NAMESPACE
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namespace ClangCodeModel {
namespace Internal {

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class ActivationSequenceContextProcessor
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{
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public:
    ActivationSequenceContextProcessor(const ClangCompletionAssistInterface *assistInterface);

    CPlusPlus::Kind completionKind() const;
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    int startOfNamePosition() const;   // e.g. points to 'b' in "foo.bar<CURSOR>"
    int operatorStartPosition() const; // e.g. points to '.' for "foo.bar<CURSOR>"
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    const QTextCursor &textCursor_forTestOnly() const;

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    static int findStartOfName(const TextEditor::AssistInterface *assistInterface,
                               int startPosition);
    static int skipPrecedingWhitespace(const TextEditor::AssistInterface *assistInterface,
                                       int startPosition);

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protected:
    void process();
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    void goBackToStartOfName();
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    void processActivationSequence();
    void processStringLiteral();
    void processComma();
    void generateTokens();
    void processDoxygenComment();
    void processComment();
    void processInclude();
    void processSlashOutsideOfAString();
    void processLeftParen();
    void processPreprocessorInclude();
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    void resetPositionsForEOFCompletionKind();
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    bool isCompletionKindStringLiteralOrSlash() const;
    bool isProbablyPreprocessorIncludeDirective() const;
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private:
    QVector<CPlusPlus::Token> m_tokens;
    QTextCursor m_textCursor;
    CPlusPlus::Token m_token;
    const ClangCompletionAssistInterface *m_assistInterface;
    int m_tokenIndex;
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    const int m_positionInDocument;
    int m_startOfNamePosition;
    int m_operatorStartPosition;
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    CPlusPlus::Kind m_completionKind;
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};

} // namespace Internal
} // namespace ClangCodeModel