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| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtQuick module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
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| |
| #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 "qquicktextnode_p.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, const QColor &c, const QColor &bc, |
| const QPointF &pos, qreal a); |
| |
| QGlyphRun glyphRun; |
| QRectF boundingRect; |
| SelectionState selectionState; |
| QQuickDefaultClipNode *clipNode; |
| Decorations decorations; |
| QColor color; |
| QColor backgroundColor; |
| QPointF position; |
| QImage image; |
| qreal ascent; |
| |
| int leftChildIndex; |
| int rightChildIndex; |
| |
| QList<QPair<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, const QColor &textColor, const QColor &backgroundColor, 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); |
| 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, |
| const QColor &color, const QColor &backgroundColor, |
| int selectionStart, int selectionEnd); |
| void addGlyphsForRanges(const QVarLengthArray<QTextLayout::FormatRange> &ranges, |
| int start, int end, |
| int selectionStart, int selectionEnd); |
| |
| void mergeProcessedNodes(QList<BinaryTreeNode *> *regularNodes, |
| QList<BinaryTreeNode *> *imageNodes); |
| void addToSceneGraph(QQuickTextNode *parent, |
| 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; |
| } |
| |
| |
| |
| |
| private: |
| struct TextDecoration |
| { |
| TextDecoration() : selectionState(Unselected) {} |
| TextDecoration(const SelectionState &s, |
| const QRectF &r, |
| const QColor &c) |
| : selectionState(s) |
| , rect(r) |
| , color(c) |
| { |
| } |
| |
| SelectionState selectionState; |
| QRectF rect; |
| QColor color; |
| }; |
| |
| void processCurrentLine(); |
| void addTextDecorations(const QVarLengthArray<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_selectedTextColor; |
| QColor m_anchorColor; |
| QPointF m_position; |
| |
| QTextLine m_currentLine; |
| Qt::LayoutDirection m_currentTextDirection; |
| |
| QList<QPair<QRectF, QColor> > m_backgrounds; |
| QList<QRectF> m_selectionRects; |
| QVarLengthArray<BinaryTreeNode, 16> m_currentLineTree; |
| |
| QList<TextDecoration> m_lines; |
| QVector<BinaryTreeNode> m_processedNodes; |
| |
| bool m_hasSelection : 1; |
| bool m_hasContents : 1; |
| friend class QQuickTextNode; |
| |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QQUICKTEXTNODEENGINE_P_H |