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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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
** 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.
**
** 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.
**
****************************************************************************/
#pragma once
#include "cpptools_global.h"
#include <cplusplus/ASTPath.h>
#include <cplusplus/CppDocument.h>
#include <cplusplus/TranslationUnit.h>
#include <QObject>
#include <QTextCursor>
namespace CppTools {
class ASTNodePositions {
public:
ASTNodePositions() = default;
explicit ASTNodePositions(CPlusPlus::AST *_ast) : ast(_ast) {}
operator bool() const { return ast; }
CPlusPlus::AST *ast = nullptr;
unsigned firstTokenIndex = 0;
unsigned lastTokenIndex = 0;
unsigned secondToLastTokenIndex = 0;
int astPosStart = -1;
int astPosEnd = -1;
};
class CPPTOOLS_EXPORT CppSelectionChanger : public QObject
{
Q_OBJECT
public:
explicit CppSelectionChanger(QObject *parent = nullptr);
enum Direction {
ExpandSelection,
ShrinkSelection
};
enum NodeIndexAndStepState {
NodeIndexAndStepNotSet,
NodeIndexAndStepWholeDocument,
};
bool changeSelection(Direction direction,
QTextCursor &cursorToModify,
const CPlusPlus::Document::Ptr doc);
void startChangeSelection();
void stopChangeSelection();
public slots:
void onCursorPositionChanged(const QTextCursor &newCursor);
protected slots:
void fineTuneForStatementPositions(unsigned firstParensTokenIndex,
unsigned lastParensTokenIndex,
ASTNodePositions &positions) const;
private:
bool performSelectionChange(QTextCursor &cursorToModify);
ASTNodePositions getASTPositions(CPlusPlus::AST *ast, const QTextCursor &cursor) const;
void updateCursorSelection(QTextCursor &cursorToModify, ASTNodePositions positions);
int possibleASTStepCount(CPlusPlus::AST *ast) const;
int currentASTStep() const;
ASTNodePositions findNextASTStepPositions(const QTextCursor &cursor);
void fineTuneASTNodePositions(ASTNodePositions &positions) const;
ASTNodePositions getFineTunedASTPositions(CPlusPlus::AST *ast, const QTextCursor &cursor) const;
int getFirstCurrentStepForASTNode(CPlusPlus::AST *ast) const;
bool isLastPossibleStepForASTNode(CPlusPlus::AST *ast) const;
ASTNodePositions findRelevantASTPositionsFromCursor(const QList<CPlusPlus::AST *> &astPath,
const QTextCursor &cursor,
int startingFromNodeIndex = -1);
ASTNodePositions findRelevantASTPositionsFromCursorWhenNodeIndexNotSet(
const QList<CPlusPlus::AST *> &astPath,
const QTextCursor &cursor);
ASTNodePositions findRelevantASTPositionsFromCursorWhenWholeDocumentSelected(
const QList<CPlusPlus::AST *> &astPath,
const QTextCursor &cursor);
ASTNodePositions findRelevantASTPositionsFromCursorFromPreviousNodeIndex(
const QList<CPlusPlus::AST *> &astPath,
const QTextCursor &cursor);
bool shouldSkipASTNodeBasedOnPosition(const ASTNodePositions &positions,
const QTextCursor &cursor) const;
void setNodeIndexAndStep(NodeIndexAndStepState state);
int getTokenStartCursorPosition(unsigned tokenIndex, const QTextCursor &cursor) const;
int getTokenEndCursorPosition(unsigned tokenIndex, const QTextCursor &cursor) const;
void printTokenDebugInfo(unsigned tokenIndex, const QTextCursor &cursor, QString prefix) const;
QTextCursor m_initialChangeSelectionCursor;
QTextCursor m_workingCursor;
CPlusPlus::Document::Ptr m_doc;
CPlusPlus::TranslationUnit *m_unit = nullptr;
Direction m_direction = ExpandSelection;
int m_changeSelectionNodeIndex = -1;
int m_nodeCurrentStep = -1;
bool m_inChangeSelection = false;
};
} // namespace CppTools
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