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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef TEXTEDITOROVERLAY_H
#define TEXTEDITOROVERLAY_H
#include <QObject>
#include <QList>
#include <QVector>
#include <QTextCursor>
#include <QColor>
QT_FORWARD_DECLARE_CLASS(QWidget)
namespace TextEditor {
class BaseTextEditorWidget;
namespace Internal {
struct OverlaySelection
{
OverlaySelection():m_fixedLength(-1), m_dropShadow(false){}
QTextCursor m_cursor_begin;
QTextCursor m_cursor_end;
QColor m_fg;
QColor m_bg;
int m_fixedLength;
bool m_dropShadow;
};
class TextEditorOverlay : public QObject
{
Q_OBJECT
public:
TextEditorOverlay(BaseTextEditorWidget *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; }
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 hasCursorInSelection(const QTextCursor &cursor) const;
void mapEquivalentSelections();
void updateEquivalentSelections(const QTextCursor &cursor);
bool hasFirstSelectionBeginMoved() const;
private:
QPainterPath createSelectionPath(const QTextCursor &begin, const QTextCursor &end, const QRect& clip);
void paintSelection(QPainter *painter, const OverlaySelection &selection);
void fillSelection(QPainter *painter, const OverlaySelection &selection, const QColor &color);
int selectionIndexForCursor(const QTextCursor &cursor) const;
QString selectionText(int selectionIndex) const;
QTextCursor assembleCursorForSelection(int selectionIndex) const;
bool m_visible;
int m_borderWidth;
int m_dropShadowWidth;
bool m_alpha;
int m_firstSelectionOriginalBegin;
BaseTextEditorWidget *m_editor;
QWidget *m_viewport;
QList<OverlaySelection> m_selections;
QVector<QList<int> > m_equivalentSelections;
};
} // namespace Internal
} // namespace TextEditor
#endif // TEXTEDITOROVERLAY_H
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