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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#pragma once
#include "cppeditor_global.h"
#include <cplusplus/ASTPath.h>
#include <cplusplus/CppDocument.h>
#include <cplusplus/TranslationUnit.h>
#include <QObject>
#include <QTextCursor>
namespace CppEditor {
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 CPPEDITOR_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 CppEditor
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