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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QABSTRACTTEXTDOCUMENTLAYOUT_H
#define QABSTRACTTEXTDOCUMENTLAYOUT_H
#include <QtGui/qtguiglobal.h>
#include <QtCore/qobject.h>
#include <QtGui/qtextlayout.h>
#include <QtGui/qtextdocument.h>
#include <QtGui/qtextcursor.h>
#include <QtGui/qpalette.h>
QT_BEGIN_NAMESPACE
class QAbstractTextDocumentLayoutPrivate;
class QTextBlock;
class QTextObjectInterface;
class QTextFrame;
class Q_GUI_EXPORT QAbstractTextDocumentLayout : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QAbstractTextDocumentLayout)
public:
explicit QAbstractTextDocumentLayout(QTextDocument *doc);
~QAbstractTextDocumentLayout();
struct Selection
{
QTextCursor cursor;
QTextCharFormat format;
};
struct PaintContext
{
PaintContext()
: cursorPosition(-1)
{}
int cursorPosition;
QPalette palette;
QRectF clip;
QList<Selection> selections;
};
virtual void draw(QPainter *painter, const PaintContext &context) = 0;
virtual int hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const = 0;
QString anchorAt(const QPointF& pos) const;
QString imageAt(const QPointF &pos) const;
QTextFormat formatAt(const QPointF &pos) const;
QTextBlock blockWithMarkerAt(const QPointF &pos) const;
virtual int pageCount() const = 0;
virtual QSizeF documentSize() const = 0;
virtual QRectF frameBoundingRect(QTextFrame *frame) const = 0;
virtual QRectF blockBoundingRect(const QTextBlock &block) const = 0;
void setPaintDevice(QPaintDevice *device);
QPaintDevice *paintDevice() const;
QTextDocument *document() const;
void registerHandler(int objectType, QObject *component);
void unregisterHandler(int objectType, QObject *component = nullptr);
QTextObjectInterface *handlerForObject(int objectType) const;
Q_SIGNALS:
void update(const QRectF & = QRectF(0., 0., 1000000000., 1000000000.));
void updateBlock(const QTextBlock &block);
void documentSizeChanged(const QSizeF &newSize);
void pageCountChanged(int newPages);
protected:
QAbstractTextDocumentLayout(QAbstractTextDocumentLayoutPrivate &, QTextDocument *);
virtual void documentChanged(int from, int charsRemoved, int charsAdded) = 0;
virtual void resizeInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
virtual void positionInlineObject(QTextInlineObject item, int posInDocument, const QTextFormat &format);
virtual void drawInlineObject(QPainter *painter, const QRectF &rect, QTextInlineObject object, int posInDocument, const QTextFormat &format);
int formatIndex(int pos);
QTextCharFormat format(int pos);
private:
friend class QWidgetTextControl;
friend class QTextDocument;
friend class QTextDocumentPrivate;
friend class QTextEngine;
friend class QTextLayout;
friend class QTextLine;
Q_PRIVATE_SLOT(d_func(), int _q_dynamicPageCountSlot())
Q_PRIVATE_SLOT(d_func(), QSizeF _q_dynamicDocumentSizeSlot())
};
Q_DECLARE_TYPEINFO(QAbstractTextDocumentLayout::Selection, Q_RELOCATABLE_TYPE);
Q_DECLARE_TYPEINFO(QAbstractTextDocumentLayout::PaintContext, Q_RELOCATABLE_TYPE);
class Q_GUI_EXPORT QTextObjectInterface
{
public:
virtual ~QTextObjectInterface();
virtual QSizeF intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
virtual void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format) = 0;
};
#ifndef Q_CLANG_QDOC
Q_DECLARE_INTERFACE(QTextObjectInterface, "org.qt-project.Qt.QTextObjectInterface")
#endif
QT_END_NAMESPACE
#endif // QABSTRACTTEXTDOCUMENTLAYOUT_H
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