}
#endif
- void QSGTextNode::addTextDecorations(Decoration decorations, const QPointF &position,
- const QColor &color, qreal width, qreal lineThickness,
- qreal underlinePos, qreal ascent)
+ QSGGlyphNode *QSGTextNode::addGlyphs(const QPointF &position, const QGlyphRun &glyphs, const QColor &color,
+ QSGText::TextStyle style, const QColor &styleColor,
+ QSGNode *parentNode)
{
- QRectF line(position.x(), position.y() - lineThickness / 2.0, width, lineThickness);
+ QSGGlyphNode *node = m_context->createGlyphNode();
+ node->setGlyphs(position + QPointF(0, glyphs.rawFont().ascent()), glyphs);
+ node->setStyle(style);
+ node->setStyleColor(styleColor);
+ node->setColor(color);
+ node->update();
- if (decorations & Underline) {
- int underlinePosition = qCeil(underlinePos);
- QRectF underline(line);
- underline.translate(0.0, underlinePosition);
- appendChildNode(new QSGSimpleRectNode(underline, color));
- }
++ /* We flag the geometry as static, but we never call markVertexDataDirty
++ or markIndexDataDirty on them. This is because all text nodes are
++ discarded when a change occurs. If we start appending/removing from
++ existing geometry, then we also need to start marking the geometry as
++ dirty.
++ */
++ node->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern);
++ node->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern);
+
- if (decorations & Overline) {
- QRectF overline(line);
- overline.translate(0.0, -ascent);
- appendChildNode(new QSGSimpleRectNode(overline, color));
- }
+ if (parentNode == 0)
+ parentNode = this;
+ parentNode->appendChildNode(node);
- if (decorations & StrikeOut) {
- QRectF strikeOut(line);
- strikeOut.translate(0.0, ascent / -3.0);
- appendChildNode(new QSGSimpleRectNode(strikeOut, color));
- }
+ return node;
}
- QSGGlyphNode *QSGTextNode::addGlyphs(const QPointF &position, const QGlyphRun &glyphs, const QColor &color,
- QSGText::TextStyle style, const QColor &styleColor, QSGGlyphNode *prevNode)
+ void QSGTextNode::setCursor(const QRectF &rect, const QColor &color)
{
- QSGGlyphNode *node = prevNode;
+ if (m_cursorNode != 0)
+ delete m_cursorNode;
+
+ m_cursorNode = new QSGSimpleRectNode(rect, color);
+ appendChildNode(m_cursorNode);
+ }
+
+ namespace {
- if (!node)
- node = m_context->createGlyphNode();
+ struct BinaryTreeNode {
+ enum SelectionState {
+ Unselected,
+ Selected
+ };
- node->setGlyphs(position, glyphs);
+ BinaryTreeNode()
+ : selectionState(Unselected)
+ , clipNode(0)
+ , decorations(QSGTextNode::NoDecoration)
+ , leftChildIndex(-1)
+ , rightChildIndex(-1)
+ {
- if (node != prevNode) {
- if (QSGDistanceFieldGlyphCache::distanceFieldEnabled()) {
- QSGDistanceFieldGlyphNode *dfNode = static_cast<QSGDistanceFieldGlyphNode *>(node);
- dfNode->setStyle(style);
- dfNode->setStyleColor(styleColor);
}
- node->setColor(color);
+
+ BinaryTreeNode(const QGlyphRun &g, SelectionState selState, const QRectF &brect,
+ const QSGTextNode::Decorations &decs, const QColor &c,
+ const QPointF &pos)
+ : glyphRun(g)
+ , boundingRect(brect)
+ , selectionState(selState)
+ , clipNode(0)
+ , decorations(decs)
+ , color(c)
+ , position(pos)
+ , leftChildIndex(-1)
+ , rightChildIndex(-1)
+ {
+ }
+
+ QGlyphRun glyphRun;
+ QRectF boundingRect;
+ SelectionState selectionState;
+ QSGClipNode *clipNode;
+ QSGTextNode::Decorations decorations;
+ QColor color;
+ QPointF position;
+
+ int leftChildIndex;
+ int rightChildIndex;
+
+ static void insert(QVarLengthArray<BinaryTreeNode> *binaryTree,
+ const QGlyphRun &glyphRun,
+ SelectionState selectionState,
+ const QColor &textColor,
+ const QPointF &position)
+ {
+ int newIndex = binaryTree->size();
+ QRectF searchRect = glyphRun.boundingRect();
+
+ if (qFuzzyIsNull(searchRect.width()) || qFuzzyIsNull(searchRect.height()))
+ return;
+
+ QSGTextNode::Decorations decorations = QSGTextNode::NoDecoration;
+ decorations |= (glyphRun.underline() ? QSGTextNode::Underline : QSGTextNode::NoDecoration);
+ decorations |= (glyphRun.overline() ? QSGTextNode::Overline : QSGTextNode::NoDecoration);
+ decorations |= (glyphRun.strikeOut() ? QSGTextNode::StrikeOut : QSGTextNode::NoDecoration);
+
+ binaryTree->append(BinaryTreeNode(glyphRun, selectionState, searchRect, decorations,
+ textColor, position));
+ if (newIndex == 0)
+ return;
+
+ int searchIndex = 0;
+ forever {
+ BinaryTreeNode *node = binaryTree->data() + searchIndex;
+ if (searchRect.left() < node->boundingRect.left()) {
+ if (node->leftChildIndex < 0) {
+ node->leftChildIndex = newIndex;
+ break;
+ } else {
+ searchIndex = node->leftChildIndex;
+ }
+ } else {
+ if (node->rightChildIndex < 0) {
+ node->rightChildIndex = newIndex;
+ break;
+ } else {
+ searchIndex = node->rightChildIndex;
+ }
+ }
+ }
+ }
+
+ static void inOrder(const QVarLengthArray<BinaryTreeNode> &binaryTree,
+ QVarLengthArray<int> *sortedIndexes,
+ int currentIndex = 0)
+ {
+ Q_ASSERT(currentIndex < binaryTree.size());
+
+ const BinaryTreeNode *node = binaryTree.data() + currentIndex;
+ if (node->leftChildIndex >= 0)
+ inOrder(binaryTree, sortedIndexes, node->leftChildIndex);
+
+ sortedIndexes->append(currentIndex);
+
+ if (node->rightChildIndex >= 0)
+ inOrder(binaryTree, sortedIndexes, node->rightChildIndex);
+ }
+ };
+
+ // 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 SelectionEngine
+ {
+ public:
+ SelectionEngine() : m_hasSelection(false) {}
+
+ QTextLine currentLine() const { return m_currentLine; }
+
+ void setCurrentLine(const QTextLine ¤tLine)
+ {
+ if (m_currentLine.isValid())
+ processCurrentLine();
+
+ m_currentLine = currentLine;
+ }
+
+ void addSelectedGlyphs(const QGlyphRun &glyphRun);
+ void addUnselectedGlyphs(const QGlyphRun &glyphRun);
+
+ void addToSceneGraph(QSGTextNode *parent,
+ QSGText::TextStyle style = QSGText::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 setPosition(const QPointF &position)
+ {
+ m_position = position;
+ }
+
+ private:
+ struct TextDecoration
+ {
+ TextDecoration() : selectionState(BinaryTreeNode::Unselected) {}
+ TextDecoration(const BinaryTreeNode::SelectionState &s,
+ const QRectF &r,
+ const QColor &c)
+ : selectionState(s)
+ , rect(r)
+ , color(c)
+ {
+ }
+
+ BinaryTreeNode::SelectionState selectionState;
+ QRectF rect;
+ QColor color;
+ };
+
+ void processCurrentLine();
+ void addTextDecorations(const QVarLengthArray<TextDecoration> &textDecorations,
+ qreal offset, qreal thickness);
+
+ QColor m_selectionColor;
+ QColor m_textColor;
+ QColor m_selectedTextColor;
+ QPointF m_position;
+
+ QTextLine m_currentLine;
+ bool m_hasSelection;
+
+ QList<QRectF> m_selectionRects;
+ QVarLengthArray<BinaryTreeNode> m_currentLineTree;
+
+ QList<TextDecoration> m_lines;
+ QVector<BinaryTreeNode> m_processedNodes;
+ };
+
+ void SelectionEngine::addTextDecorations(const QVarLengthArray<TextDecoration> &textDecorations,
+ qreal offset, qreal thickness)
+ {
+ for (int i=0; i<textDecorations.size(); ++i) {
+ TextDecoration textDecoration = textDecorations.at(i);
+
+ {
+ QRectF &rect = textDecoration.rect;
+ rect.setY(qRound(rect.y() + m_currentLine.ascent() + offset));
+ rect.setHeight(thickness);
+ }
+
+ m_lines.append(textDecoration);
+ }
}
- node->update();
+ void SelectionEngine::processCurrentLine()
+ {
+ // No glyphs, do nothing
+ if (m_currentLineTree.isEmpty())
+ return;
+
+ // 1. Go through current line and get correct decoration position for each node based on
+ // neighbouring decorations. Add decoration to global list
+ // 2. Create clip nodes for all selected text. Try to merge as many as possible within
+ // the line.
+ // 3. Add QRects to a list of selection rects.
+ // 4. Add all nodes to a global processed list
+ QVarLengthArray<int> sortedIndexes; // Indexes in tree sorted by x position
+ BinaryTreeNode::inOrder(m_currentLineTree, &sortedIndexes);
+
+ Q_ASSERT(sortedIndexes.size() == m_currentLineTree.size());
+
+ BinaryTreeNode::SelectionState currentSelectionState = BinaryTreeNode::Unselected;
+ QRectF currentRect;
+
+ QSGTextNode::Decorations currentDecorations = QSGTextNode::NoDecoration;
+ qreal underlineOffset = 0.0;
+ qreal underlineThickness = 0.0;
+
+ qreal overlineOffset = 0.0;
+ qreal overlineThickness = 0.0;
+
+ qreal strikeOutOffset = 0.0;
+ qreal strikeOutThickness = 0.0;
+
+ QRectF decorationRect = currentRect;
+
+ QColor lastColor;
+
+ QVarLengthArray<TextDecoration> pendingUnderlines;
+ QVarLengthArray<TextDecoration> pendingOverlines;
+ QVarLengthArray<TextDecoration> pendingStrikeOuts;
+ if (!sortedIndexes.isEmpty()) {
+ QSGClipNode *currentClipNode = m_hasSelection ? new QSGClipNode : 0;
+ bool currentClipNodeUsed = false;
+ for (int i=0; i<=sortedIndexes.size(); ++i) {
+ BinaryTreeNode *node = 0;
+ if (i < sortedIndexes.size()) {
+ int sortedIndex = sortedIndexes.at(i);
+ Q_ASSERT(sortedIndex < m_currentLineTree.size());
+
+ node = m_currentLineTree.data() + sortedIndex;
+ }
+
+ if (i == 0)
+ currentSelectionState = node->selectionState;
+
+ // Update decorations
+ if (currentDecorations != QSGTextNode::NoDecoration) {
+ decorationRect.setY(m_position.y() + m_currentLine.y());
+ decorationRect.setHeight(m_currentLine.height());
+
+ if (node != 0)
+ decorationRect.setRight(node->boundingRect.left());
+
+ TextDecoration textDecoration(currentSelectionState, decorationRect, lastColor);
+ if (currentDecorations & QSGTextNode::Underline)
+ pendingUnderlines.append(textDecoration);
+
+ if (currentDecorations & QSGTextNode::Overline)
+ pendingOverlines.append(textDecoration);
+
+ if (currentDecorations & QSGTextNode::StrikeOut)
+ pendingStrikeOuts.append(textDecoration);
+ }
+
+ // If we've reached an unselected node from a selected node, we add the
+ // selection rect to the graph, and we add decoration every time the
+ // selection state changes, because that means the text color changes
+ if (node == 0 || node->selectionState != currentSelectionState) {
+ if (node != 0)
+ currentRect.setRight(node->boundingRect.left());
+ currentRect.setY(m_position.y() + m_currentLine.y());
+ currentRect.setHeight(m_currentLine.height());
+
+ // Draw selection all the way up to the left edge of the unselected item
+ if (currentSelectionState == BinaryTreeNode::Selected)
+ m_selectionRects.append(currentRect);
+
+ if (currentClipNode != 0) {
+ if (!currentClipNodeUsed) {
+ delete currentClipNode;
+ } else {
+ currentClipNode->setIsRectangular(true);
+ currentClipNode->setClipRect(currentRect);
+ }
+ }
+
+ if (node != 0 && m_hasSelection)
+ currentClipNode = new QSGClipNode;
+ else
+ currentClipNode = 0;
+ currentClipNodeUsed = false;
+
+ if (node != 0) {
+ currentSelectionState = node->selectionState;
+ currentRect = node->boundingRect;
+
+ // Make sure currentRect is valid, otherwise the unite won't work
+ if (currentRect.isNull())
+ currentRect.setSize(QSizeF(1, 1));
+ }
+ } else {
+ if (currentRect.isNull())
+ currentRect = node->boundingRect;
+ else
+ currentRect = currentRect.united(node->boundingRect);
+ }
+
+ if (node != 0) {
+ node->clipNode = currentClipNode;
+ currentClipNodeUsed = true;
+
+ decorationRect = node->boundingRect;
+
+ // If previous item(s) had underline and current does not, then we add the
+ // pending lines to the lists and likewise for overlines and strikeouts
+ if (!pendingUnderlines.isEmpty()
+ && !(node->decorations & QSGTextNode::Underline)) {
+ addTextDecorations(pendingUnderlines, underlineOffset, underlineThickness);
+
+ pendingUnderlines.clear();
+
+ underlineOffset = 0.0;
+ underlineThickness = 0.0;
+ }
+
+ // ### Add pending when overlineOffset/thickness changes to minimize number of
+ // nodes
+ if (!pendingOverlines.isEmpty()) {
+ addTextDecorations(pendingOverlines, overlineOffset, overlineThickness);
+
+ pendingOverlines.clear();
+
+ overlineOffset = 0.0;
+ overlineThickness = 0.0;
+ }
+
+ // ### Add pending when overlineOffset/thickness changes to minimize number of
+ // nodes
+ if (!pendingStrikeOuts.isEmpty()) {
+ addTextDecorations(pendingStrikeOuts, strikeOutOffset, strikeOutThickness);
+
+ pendingStrikeOuts.clear();
+
+ strikeOutOffset = 0.0;
+ strikeOutThickness = 0.0;
+ }
+
+ // Merge current values with previous. Prefer greatest thickness
+ QRawFont rawFont = node->glyphRun.rawFont();
+ if (node->decorations & QSGTextNode::Underline) {
+ if (rawFont.lineThickness() > underlineThickness) {
+ underlineThickness = rawFont.lineThickness();
+ underlineOffset = rawFont.underlinePosition();
+ }
+ }
+
+ if (node->decorations & QSGTextNode::Overline) {
+ overlineOffset = -rawFont.ascent();
+ overlineThickness = rawFont.lineThickness();
+ }
+
+ if (node->decorations & QSGTextNode::StrikeOut) {
+ strikeOutThickness = rawFont.lineThickness();
+ strikeOutOffset = rawFont.ascent() / -3.0;
+ }
+
+ currentDecorations = node->decorations;
+ lastColor = node->color;
+ m_processedNodes.append(*node);
+ }
+ }
- // A new node, add it to the graph.
- if (node != prevNode) {
- appendChildNode(node);
-
- /* We flag the geometry as static, but we never call markVertexDataDirty
- or markIndexDataDirty on them. This is because all text nodes are
- discarded when a change occurs. If we start appending/removing from
- existing geometry, then we also need to start marking the geometry as
- dirty.
- */
- node->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern);
- node->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern);
+ // If there are pending decorations, we need to add them
+ if (!pendingUnderlines.isEmpty())
+ addTextDecorations(pendingUnderlines, underlineOffset, underlineThickness);
+
+ if (!pendingOverlines.isEmpty())
+ addTextDecorations(pendingOverlines, overlineOffset, overlineThickness);
+
+ if (!pendingStrikeOuts.isEmpty())
+ addTextDecorations(pendingStrikeOuts, strikeOutOffset, strikeOutThickness);
+ }
+
+ m_currentLineTree.clear();
+ m_currentLine = QTextLine();
+ m_hasSelection = false;
}
- return node;
+ void SelectionEngine::addUnselectedGlyphs(const QGlyphRun &glyphRun)
+ {
+ BinaryTreeNode::insert(&m_currentLineTree, glyphRun, BinaryTreeNode::Unselected,
+ m_textColor, m_position);
+ }
+
+ void SelectionEngine::addSelectedGlyphs(const QGlyphRun &glyphRun)
+ {
+ int currentSize = m_currentLineTree.size();
+ BinaryTreeNode::insert(&m_currentLineTree, glyphRun, BinaryTreeNode::Selected,
+ m_textColor, m_position);
+ m_hasSelection = m_hasSelection || m_currentLineTree.size() > currentSize;
+ }
+
+ void SelectionEngine::addToSceneGraph(QSGTextNode *parentNode,
+ QSGText::TextStyle style,
+ const QColor &styleColor)
+ {
+ if (m_currentLine.isValid())
+ processCurrentLine();
+
+ // First, prepend all selection rectangles to the tree
+ for (int i=0; i<m_selectionRects.size(); ++i) {
+ const QRectF &rect = m_selectionRects.at(i);
+
+ parentNode->appendChildNode(new QSGSimpleRectNode(rect, m_selectionColor));
+ }
+
+ // Then, go through all the nodes for all lines and combine all QGlyphRuns with a common
+ // font, selection state and clip node.
+ typedef QPair<QFontEngine *, QPair<QSGClipNode *, QPair<QRgb, int> > > KeyType;
+ QHash<KeyType, BinaryTreeNode *> map;
+ for (int i=0; i<m_processedNodes.size(); ++i) {
+ BinaryTreeNode *node = m_processedNodes.data() + i;
+
+ QGlyphRun glyphRun = node->glyphRun;
+ QRawFont rawFont = glyphRun.rawFont();
+ QRawFontPrivate *rawFontD = QRawFontPrivate::get(rawFont);
+
+ QFontEngine *fontEngine = rawFontD->fontEngine;
+
+ KeyType key(qMakePair(fontEngine,
+ qMakePair(node->clipNode,
+ qMakePair(node->color.rgba(), int(node->selectionState)))));
+
+ BinaryTreeNode *otherNode = map.value(key, 0);
+ if (otherNode != 0) {
+ QGlyphRun &otherGlyphRun = otherNode->glyphRun;
+
+ QVector<quint32> otherGlyphIndexes = otherGlyphRun.glyphIndexes();
+ QVector<QPointF> otherGlyphPositions = otherGlyphRun.positions();
+
+ otherGlyphIndexes += glyphRun.glyphIndexes();
+
+ QVector<QPointF> glyphPositions = glyphRun.positions();
+ for (int j=0; j<glyphPositions.size(); ++j) {
+ otherGlyphPositions += glyphPositions.at(j) + (node->position - otherNode->position);
+ }
+
+ otherGlyphRun.setGlyphIndexes(otherGlyphIndexes);
+ otherGlyphRun.setPositions(otherGlyphPositions);
+
+ } else {
+ map.insert(key, node);
+ }
+ }
+
+ // ...and add clip nodes and glyphs to tree.
+ QHash<KeyType, BinaryTreeNode *>::const_iterator it = map.constBegin();
+ while (it != map.constEnd()) {
+
+ BinaryTreeNode *node = it.value();
+
+ QSGClipNode *clipNode = node->clipNode;
+ if (clipNode != 0 && clipNode->parent() == 0 )
+ parentNode->appendChildNode(clipNode);
+
+ QColor color = node->selectionState == BinaryTreeNode::Selected
+ ? m_selectedTextColor
+ : node->color;
+
+ parentNode->addGlyphs(node->position, node->glyphRun, color, style, styleColor, clipNode);
+
+ ++it;
+ }
+
+ // Finally, add decorations for each node to the tree.
+ for (int i=0; i<m_lines.size(); ++i) {
+ const TextDecoration &textDecoration = m_lines.at(i);
+
+ QColor color = textDecoration.selectionState == BinaryTreeNode::Selected
+ ? m_selectedTextColor
+ : textDecoration.color;
+
+ parentNode->appendChildNode(new QSGSimpleRectNode(textDecoration.rect, color));
+ }
+ }
}
- void QSGTextNode::addTextDocument(const QPointF &position, QTextDocument *textDocument, const QColor &color,
- QSGText::TextStyle style, const QColor &styleColor)
+ void QSGTextNode::addTextDocument(const QPointF &, QTextDocument *textDocument,
+ const QColor &textColor,
+ QSGText::TextStyle style, const QColor &styleColor,
+ const QColor &selectionColor, const QColor &selectedTextColor,
+ int selectionStart, int selectionEnd)
{
- Q_UNUSED(position)
QTextFrame *textFrame = textDocument->rootFrame();
- QPointF p = textDocument->documentLayout()->frameBoundingRect(textFrame).topLeft();
+ QPointF position = textDocument->documentLayout()->frameBoundingRect(textFrame).topLeft();
+
+ SelectionEngine engine;
+ engine.setTextColor(textColor);
+ engine.setSelectedTextColor(selectedTextColor);
+ engine.setSelectionColor(selectionColor);
+
+ bool hasSelection = selectionStart >= 0 && selectionEnd >= 0 && selectionStart != selectionEnd;
QTextFrame::iterator it = textFrame->begin();
while (!it.atEnd()) {
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