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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
// Qt-Security score:significant reason:default
#include <QtCore/qlist.h>
#include <QtCore/qvarlengtharray.h>
#include <QtGui/qcolor.h>
#include <QtGui/qglyphrun.h>
#include <QtGui/qimage.h>
#include <QtGui/qtextdocument.h>
#include <QtGui/qtextlayout.h>
#include "qquickclipnode_p.h"
#include "qsginternaltextnode_p.h"
#include <QtCore/qspan.h>
#ifndef QQUICKTEXTNODEENGINE_P_H
#define QQUICKTEXTNODEENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
QT_BEGIN_NAMESPACE
// Engine that takes glyph runs as input, and produces a set of glyph nodes, clip nodes,
// and rectangle nodes to represent the text, decorations and selection. Will try to minimize
// number of nodes, and join decorations in neighbouring items
class QQuickTextNodeEngine {
public:
enum Decoration {
NoDecoration = 0x0,
Underline = 0x1,
Overline = 0x2,
StrikeOut = 0x4,
Background = 0x8
};
Q_DECLARE_FLAGS(Decorations, Decoration)
enum SelectionState {
Unselected,
Selected
};
struct BinaryTreeNode {
BinaryTreeNode()
: selectionState(Unselected), clipNode(0), decorations(Decoration::NoDecoration)
, ascent(0.0), leftChildIndex(-1), rightChildIndex(-1)
{
}
BinaryTreeNode(const QRectF &brect, const QImage &i, SelectionState selState, qreal a)
: boundingRect(brect), selectionState(selState), clipNode(0), decorations(Decoration::NoDecoration)
, image(i), ascent(a), leftChildIndex(-1), rightChildIndex(-1)
{
}
BinaryTreeNode(const QGlyphRun &g, SelectionState selState, const QRectF &brect,
const Decorations &decs, QTextCharFormat::UnderlineStyle us,
const QColor &c, const QColor &bc, const QColor &dc,
const QPointF &pos, qreal a);
QGlyphRun glyphRun;
QRectF boundingRect;
SelectionState selectionState;
QQuickDefaultClipNode *clipNode;
Decorations decorations;
QTextCharFormat::UnderlineStyle underlineStyle = QTextCharFormat::NoUnderline;
QColor color;
QColor backgroundColor;
QColor decorationColor;
QPointF position;
QImage image;
qreal ascent;
int leftChildIndex;
int rightChildIndex;
QList<std::pair<int, int> > ranges;
static void insert(QVarLengthArray<BinaryTreeNode, 16> *binaryTree, const QRectF &rect, const QImage &image, qreal ascent, SelectionState selectionState)
{ insert(binaryTree, BinaryTreeNode(rect, image, selectionState, ascent)); }
static void insert(QVarLengthArray<BinaryTreeNode, 16> *binaryTree,
const QGlyphRun &glyphRun, SelectionState selectionState,
Decorations decorations, QTextCharFormat::UnderlineStyle underlineStyle,
const QColor &textColor, const QColor &backgroundColor,
const QColor &underlineColor, const QPointF &position);
static void insert(QVarLengthArray<BinaryTreeNode, 16> *binaryTree, const BinaryTreeNode &binaryTreeNode);
static void inOrder(const QVarLengthArray<BinaryTreeNode, 16> &binaryTree, QVarLengthArray<int> *sortedIndexes, int currentIndex = 0);
};
struct BinaryTreeNodeKey
{
BinaryTreeNodeKey(BinaryTreeNode *node);
bool operator==(const BinaryTreeNodeKey &otherKey) const
{
return fontEngine == otherKey.fontEngine
&& clipNode == otherKey.clipNode
&& color == otherKey.color
&& selectionState == otherKey.selectionState;
}
QFontEngine *fontEngine;
QQuickDefaultClipNode *clipNode;
QRgb color;
int selectionState;
};
QQuickTextNodeEngine()
: m_currentTextDirection(Qt::LeftToRight)
, m_hasSelection(false)
, m_hasContents(false)
{}
bool hasContents() const { return m_hasContents; }
void addTextBlock(QTextDocument *, const QTextBlock &, const QPointF &position, const QColor &textColor,
const QColor& anchorColor, int selectionStart, int selectionEnd, const QRectF &viewport = QRectF());
QTextLine currentLine() const { return m_currentLine; }
void setCurrentLine(const QTextLine ¤tLine)
{
if (m_currentLine.isValid())
processCurrentLine();
m_currentLine = currentLine;
}
void setCurrentTextDirection(Qt::LayoutDirection textDirection)
{
m_currentTextDirection = textDirection;
}
void addBorder(const QRectF &rect, qreal border, QTextFrameFormat::BorderStyle borderStyle,
const QBrush &borderBrush);
void addFrameDecorations(QTextDocument *document, QTextFrame *frame);
void addImage(const QRectF &rect, const QImage &image, qreal ascent,
SelectionState selectionState,
QTextFrameFormat::Position layoutPosition);
int addText(const QTextBlock &block,
const QTextCharFormat &charFormat,
const QColor &textColor,
const QVarLengthArray<QTextLayout::FormatRange> &colorChanges,
int textPos, int fragmentEnd,
int selectionStart, int selectionEnd);
void addTextObject(const QTextBlock &block, const QPointF &position, const QTextCharFormat &format,
SelectionState selectionState,
QTextDocument *textDocument, int pos,
QTextFrameFormat::Position layoutPosition = QTextFrameFormat::InFlow);
void addSelectedGlyphs(const QGlyphRun &glyphRun);
void addUnselectedGlyphs(const QGlyphRun &glyphRun);
void addGlyphsInRange(int rangeStart, int rangeEnd,
QTextCharFormat::UnderlineStyle underlineStyle,
const QColor &color, const QColor &backgroundColor,
const QColor &underlineColor, int selectionStart, int selectionEnd);
void addGlyphsForRanges(const QVarLengthArray<QTextLayout::FormatRange> &ranges,
int start, int end,
int selectionStart, int selectionEnd);
void mergeProcessedNodes(QVarLengthArray<BinaryTreeNode *, 8> *regularNodes,
QVarLengthArray<BinaryTreeNode *, 8> *imageNodes);
void addToSceneGraph(QSGInternalTextNode *parent,
QSGInternalTextNode::RecycleBin *recycleBin,
QQuickText::TextStyle style = QQuickText::Normal,
const QColor &styleColor = QColor());
void setSelectionColor(const QColor &selectionColor)
{
m_selectionColor = selectionColor;
}
void setSelectedTextColor(const QColor &selectedTextColor)
{
m_selectedTextColor = selectedTextColor;
}
void setTextColor(const QColor &textColor)
{
m_textColor = textColor;
}
void setAnchorColor(const QColor &anchorColor)
{
m_anchorColor = anchorColor;
}
void setPosition(const QPointF &position)
{
m_position = position;
}
void setDevicePixelRatio(qreal dpr)
{
m_devicePixelRatio = dpr;
}
private:
struct TextDecoration
{
TextDecoration() : selectionState(Unselected) {}
TextDecoration(const SelectionState &s, const QRectF &r, const QColor &c,
QTextCharFormat::UnderlineStyle us = QTextCharFormat::NoUnderline)
: selectionState(s), underlineStyle(us), rect(r), color(c)
{
}
SelectionState selectionState;
QTextCharFormat::UnderlineStyle underlineStyle = QTextCharFormat::NoUnderline;
QRectF rect;
QColor color;
};
void processCurrentLine();
void addTextDecorations(QSpan<const TextDecoration> textDecorations, qreal offset, qreal thickness);
void mergeFormats(QTextLayout *textLayout, QVarLengthArray<QTextLayout::FormatRange> *mergedFormats);
QColor m_selectionColor;
QColor m_textColor;
QColor m_backgroundColor;
QColor m_decorationColor;
QColor m_selectedTextColor;
QColor m_anchorColor;
QPointF m_position;
QTextCharFormat::UnderlineStyle m_underlineStyle = QTextCharFormat::NoUnderline;
QTextLine m_currentLine;
Qt::LayoutDirection m_currentTextDirection;
QList<std::pair<QRectF, QColor> > m_backgrounds;
QList<QRectF> m_selectionRects;
QVarLengthArray<BinaryTreeNode, 16> m_currentLineTree;
QList<TextDecoration> m_lines;
QList<BinaryTreeNode> m_processedNodes;
qreal m_devicePixelRatio = 1.0;
bool m_hasSelection : 1;
bool m_hasContents : 1;
friend class QSGInternalTextNode;
};
QT_END_NAMESPACE
#endif // QQUICKTEXTNODEENGINE_P_H