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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#pragma once
#include "utils_global.h"
#include <QKeySequence>
#include <QTextCursor>
QT_BEGIN_NAMESPACE
class QKeyEvent;
class QPlainTextEdit;
QT_END_NAMESPACE
namespace Utils {
class QTCREATOR_UTILS_EXPORT MultiTextCursor
{
public:
MultiTextCursor();
explicit MultiTextCursor(const QList<QTextCursor> &cursors);
MultiTextCursor(const MultiTextCursor &multiCursor);
MultiTextCursor &operator=(const MultiTextCursor &multiCursor);
MultiTextCursor(const MultiTextCursor &&multiCursor);
MultiTextCursor &operator=(const MultiTextCursor &&multiCursor);
~MultiTextCursor();
/// Replaces all cursors with \param cursors and the last one will be the new main cursors.
void setCursors(const QList<QTextCursor> &cursors);
const QList<QTextCursor> cursors() const;
/// Returns whether this multi cursor contains any cursor.
bool isNull() const;
/// Returns whether this multi cursor contains more than one cursor.
bool hasMultipleCursors() const;
/// Returns the number of cursors handled by this cursor.
int cursorCount() const;
/// the \param cursor that is appended by added by \brief addCursor
/// will be interpreted as the new main cursor
void addCursor(const QTextCursor &cursor);
void addCursors(const QList<QTextCursor> &cursors);
/// convenience function that removes the old main cursor and appends
/// \param cursor as the new main cursor
void replaceMainCursor(const QTextCursor &cursor);
/// Returns the main cursor.
QTextCursor mainCursor() const;
/// Returns the main cursor and removes it from this multi cursor.
QTextCursor takeMainCursor();
void beginEditBlock();
void endEditBlock();
/// merges overlapping cursors together
void mergeCursors();
/// applies the move key event \param e to all cursors in this multi cursor
bool handleMoveKeyEvent(QKeyEvent *e, QPlainTextEdit *edit, bool camelCaseNavigationEnabled);
/// applies the move \param operation to all cursors in this multi cursor \param n times
/// with the move \param mode
void movePosition(QTextCursor::MoveOperation operation, QTextCursor::MoveMode mode, int n = 1);
/// Returns whether any cursor has a selection.
bool hasSelection() const;
/// Returns the selected text of all cursors that have a selection separated by
/// a newline character.
QString selectedText() const;
/// removes the selected text of all cursors that have a selection from the document
void removeSelectedText();
/// inserts \param text into all cursors, potentially removing correctly selected text
void insertText(const QString &text, bool selectNewText = false);
bool operator==(const MultiTextCursor &other) const;
bool operator!=(const MultiTextCursor &other) const;
template <typename T, typename mapit>
class BaseIterator {
public:
using iterator_category = std::input_iterator_tag;
using difference_type = int;
using value_type = T;
using pointer = T *;
using reference = T &;
BaseIterator(const mapit &it) : internalit(it) {}
BaseIterator &operator++() { ++internalit; return *this; }
BaseIterator operator++(int) { auto result = *this; ++(*this); return result; }
bool operator==(BaseIterator other) const { return internalit == other.internalit; }
bool operator!=(BaseIterator other) const { return !(*this == other); }
reference operator*() const { return *(internalit->second); }
private:
mapit internalit;
};
using iterator
= BaseIterator<QTextCursor, std::map<int, std::list<QTextCursor>::iterator>::iterator>;
using const_iterator
= BaseIterator<const QTextCursor,
std::map<int, std::list<QTextCursor>::iterator>::const_iterator>;
iterator begin() { return m_cursorMap.begin(); }
iterator end() { return m_cursorMap.end(); }
const_iterator begin() const { return m_cursorMap.begin(); }
const_iterator end() const { return m_cursorMap.end(); }
const_iterator constBegin() const { return m_cursorMap.cbegin(); }
const_iterator constEnd() const { return m_cursorMap.cend(); }
static bool multiCursorAddEvent(QKeyEvent *e, QKeySequence::StandardKey matchKey);
private:
std::list<QTextCursor> m_cursorList;
std::map<int, std::list<QTextCursor>::iterator> m_cursorMap;
void fillMapWithList();
};
} // namespace Utils
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