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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include <QObject>
#include <QList>
#include <QVector>
#include <QTextCursor>
#include <QColor>
QT_FORWARD_DECLARE_CLASS(QWidget)
QT_FORWARD_DECLARE_CLASS(QPainterPath)
namespace TextEditor {
class TextEditorWidget;
namespace Internal {
struct OverlaySelection
{
OverlaySelection() = default;
QTextCursor m_cursor_begin;
QTextCursor m_cursor_end;
QColor m_fg;
QColor m_bg;
int m_fixedLength = -1;
bool m_dropShadow = false;
};
class TextEditorOverlay : public QObject
{
Q_OBJECT
public:
TextEditorOverlay(TextEditorWidget *editor);
QRect rect() const;
void paint(QPainter *painter, const QRect &clip);
void fill(QPainter *painter, const QColor &color, const QRect &clip);
bool isVisible() const { return m_visible; }
void setVisible(bool b);
inline void hide() { setVisible(false); }
inline void show() { setVisible(true); }
void setBorderWidth(int bw) {m_borderWidth = bw; }
void update();
void setAlpha(bool enabled) { m_alpha = enabled; }
virtual void clear();
enum OverlaySelectionFlags {
LockSize = 1,
DropShadow = 2,
ExpandBegin = 4
};
void addOverlaySelection(const QTextCursor &cursor, const QColor &fg, const QColor &bg,
uint overlaySelectionFlags = 0);
void addOverlaySelection(int begin, int end, const QColor &fg, const QColor &bg,
uint overlaySelectionFlags = 0);
const QList<OverlaySelection> &selections() const { return m_selections; }
inline bool isEmpty() const { return m_selections.isEmpty(); }
inline int dropShadowWidth() const { return m_dropShadowWidth; }
bool hasFirstSelectionBeginMoved() const;
protected:
QTextCursor cursorForSelection(const OverlaySelection &selection) const;
QTextCursor cursorForIndex(int selectionIndex) const;
private:
QPainterPath createSelectionPath(const QTextCursor &begin, const QTextCursor &end, const QRect& clip);
void paintSelection(QPainter *painter, const OverlaySelection &selection, const QRect &clip);
void fillSelection(QPainter *painter, const OverlaySelection &selection, const QColor &color, const QRect &clip);
bool m_visible;
bool m_alpha;
int m_borderWidth;
int m_dropShadowWidth;
int m_firstSelectionOriginalBegin;
TextEditorWidget *m_editor;
QWidget *m_viewport;
QList<OverlaySelection> m_selections;
};
} // namespace Internal
} // namespace TextEditor
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