| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtQuick module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
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| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
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| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
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| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qquicktextnode_p.h" |
| |
| #include "qquicktextnodeengine_p.h" |
| |
| #include <private/qsgadaptationlayer_p.h> |
| #include <private/qsgdistancefieldglyphnode_p.h> |
| #include <private/qquickclipnode_p.h> |
| #include <private/qquickitem_p.h> |
| #include <QtQuick/private/qsgcontext_p.h> |
| |
| #include <QtCore/qpoint.h> |
| #include <qtextdocument.h> |
| #include <qtextlayout.h> |
| #include <qabstracttextdocumentlayout.h> |
| #include <qxmlstream.h> |
| #include <private/qquickstyledtext_p.h> |
| #include <private/qfont_p.h> |
| #include <private/qfontengine_p.h> |
| |
| #include <private/qtextdocumentlayout_p.h> |
| #include <qhash.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace { |
| |
| class ProtectedLayoutAccessor: public QAbstractTextDocumentLayout |
| { |
| public: |
| inline QTextCharFormat formatAccessor(int pos) |
| { |
| return format(pos); |
| } |
| }; |
| |
| } |
| |
| /*! |
| Creates an empty QQuickTextNode |
| */ |
| QQuickTextNode::QQuickTextNode(QQuickItem *ownerElement) |
| : m_cursorNode(nullptr), m_ownerElement(ownerElement), m_useNativeRenderer(false) |
| { |
| #ifdef QSG_RUNTIME_DESCRIPTION |
| qsgnode_set_description(this, QLatin1String("text")); |
| #endif |
| } |
| |
| QQuickTextNode::~QQuickTextNode() |
| { |
| qDeleteAll(m_textures); |
| } |
| |
| QSGGlyphNode *QQuickTextNode::addGlyphs(const QPointF &position, const QGlyphRun &glyphs, const QColor &color, |
| QQuickText::TextStyle style, const QColor &styleColor, |
| QSGNode *parentNode) |
| { |
| QSGRenderContext *sg = QQuickItemPrivate::get(m_ownerElement)->sceneGraphRenderContext(); |
| QRawFont font = glyphs.rawFont(); |
| bool preferNativeGlyphNode = m_useNativeRenderer; |
| if (!preferNativeGlyphNode) { |
| QRawFontPrivate *fontPriv = QRawFontPrivate::get(font); |
| if (fontPriv->fontEngine->hasUnreliableGlyphOutline()) { |
| preferNativeGlyphNode = true; |
| } else { |
| QFontEngine *fe = QRawFontPrivate::get(font)->fontEngine; |
| preferNativeGlyphNode = !fe->isSmoothlyScalable; |
| } |
| } |
| |
| QSGGlyphNode *node = sg->sceneGraphContext()->createGlyphNode(sg, preferNativeGlyphNode); |
| |
| node->setOwnerElement(m_ownerElement); |
| node->setGlyphs(position + QPointF(0, glyphs.rawFont().ascent()), glyphs); |
| node->setStyle(style); |
| node->setStyleColor(styleColor); |
| node->setColor(color); |
| node->update(); |
| |
| /* 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 (parentNode == nullptr) |
| parentNode = this; |
| parentNode->appendChildNode(node); |
| |
| return node; |
| } |
| |
| void QQuickTextNode::setCursor(const QRectF &rect, const QColor &color) |
| { |
| if (m_cursorNode != nullptr) |
| delete m_cursorNode; |
| |
| QSGRenderContext *sg = QQuickItemPrivate::get(m_ownerElement)->sceneGraphRenderContext(); |
| m_cursorNode = sg->sceneGraphContext()->createInternalRectangleNode(rect, color); |
| appendChildNode(m_cursorNode); |
| } |
| |
| void QQuickTextNode::clearCursor() |
| { |
| if (m_cursorNode) |
| removeChildNode(m_cursorNode); |
| delete m_cursorNode; |
| m_cursorNode = nullptr; |
| } |
| |
| void QQuickTextNode::addRectangleNode(const QRectF &rect, const QColor &color) |
| { |
| QSGRenderContext *sg = QQuickItemPrivate::get(m_ownerElement)->sceneGraphRenderContext(); |
| appendChildNode(sg->sceneGraphContext()->createInternalRectangleNode(rect, color)); |
| } |
| |
| |
| void QQuickTextNode::addImage(const QRectF &rect, const QImage &image) |
| { |
| QSGRenderContext *sg = QQuickItemPrivate::get(m_ownerElement)->sceneGraphRenderContext(); |
| QSGInternalImageNode *node = sg->sceneGraphContext()->createInternalImageNode(sg); |
| QSGTexture *texture = sg->createTexture(image); |
| if (m_ownerElement->smooth()) |
| texture->setFiltering(QSGTexture::Linear); |
| m_textures.append(texture); |
| node->setTargetRect(rect); |
| node->setInnerTargetRect(rect); |
| node->setTexture(texture); |
| if (m_ownerElement->smooth()) |
| node->setFiltering(QSGTexture::Linear); |
| appendChildNode(node); |
| node->update(); |
| } |
| |
| void QQuickTextNode::addTextDocument(const QPointF &position, QTextDocument *textDocument, |
| const QColor &textColor, |
| QQuickText::TextStyle style, const QColor &styleColor, |
| const QColor &anchorColor, |
| const QColor &selectionColor, const QColor &selectedTextColor, |
| int selectionStart, int selectionEnd) |
| { |
| QQuickTextNodeEngine engine; |
| engine.setTextColor(textColor); |
| engine.setSelectedTextColor(selectedTextColor); |
| engine.setSelectionColor(selectionColor); |
| engine.setAnchorColor(anchorColor); |
| engine.setPosition(position); |
| |
| QList<QTextFrame *> frames; |
| frames.append(textDocument->rootFrame()); |
| while (!frames.isEmpty()) { |
| QTextFrame *textFrame = frames.takeFirst(); |
| frames.append(textFrame->childFrames()); |
| |
| engine.addFrameDecorations(textDocument, textFrame); |
| |
| if (textFrame->firstPosition() > textFrame->lastPosition() |
| && textFrame->frameFormat().position() != QTextFrameFormat::InFlow) { |
| const int pos = textFrame->firstPosition() - 1; |
| ProtectedLayoutAccessor *a = static_cast<ProtectedLayoutAccessor *>(textDocument->documentLayout()); |
| QTextCharFormat format = a->formatAccessor(pos); |
| QRectF rect = a->frameBoundingRect(textFrame); |
| |
| QTextBlock block = textFrame->firstCursorPosition().block(); |
| engine.setCurrentLine(block.layout()->lineForTextPosition(pos - block.position())); |
| engine.addTextObject(block, rect.topLeft(), format, QQuickTextNodeEngine::Unselected, textDocument, |
| pos, textFrame->frameFormat().position()); |
| } else { |
| QTextFrame::iterator it = textFrame->begin(); |
| |
| while (!it.atEnd()) { |
| Q_ASSERT(!engine.currentLine().isValid()); |
| |
| QTextBlock block = it.currentBlock(); |
| engine.addTextBlock(textDocument, block, position, textColor, anchorColor, selectionStart, selectionEnd); |
| ++it; |
| } |
| } |
| } |
| |
| engine.addToSceneGraph(this, style, styleColor); |
| } |
| |
| void QQuickTextNode::addTextLayout(const QPointF &position, QTextLayout *textLayout, const QColor &color, |
| QQuickText::TextStyle style, const QColor &styleColor, |
| const QColor &anchorColor, |
| const QColor &selectionColor, const QColor &selectedTextColor, |
| int selectionStart, int selectionEnd, |
| int lineStart, int lineCount) |
| { |
| QQuickTextNodeEngine engine; |
| engine.setTextColor(color); |
| engine.setSelectedTextColor(selectedTextColor); |
| engine.setSelectionColor(selectionColor); |
| engine.setAnchorColor(anchorColor); |
| engine.setPosition(position); |
| |
| #if QT_CONFIG(im) |
| int preeditLength = textLayout->preeditAreaText().length(); |
| int preeditPosition = textLayout->preeditAreaPosition(); |
| #endif |
| |
| QVarLengthArray<QTextLayout::FormatRange> colorChanges; |
| engine.mergeFormats(textLayout, &colorChanges); |
| |
| lineCount = lineCount >= 0 |
| ? qMin(lineStart + lineCount, textLayout->lineCount()) |
| : textLayout->lineCount(); |
| |
| for (int i=lineStart; i<lineCount; ++i) { |
| QTextLine line = textLayout->lineAt(i); |
| |
| int start = line.textStart(); |
| int length = line.textLength(); |
| int end = start + length; |
| |
| #if QT_CONFIG(im) |
| if (preeditPosition >= 0 |
| && preeditPosition >= start |
| && preeditPosition < end) { |
| end += preeditLength; |
| } |
| #endif |
| |
| engine.setCurrentLine(line); |
| engine.addGlyphsForRanges(colorChanges, start, end, selectionStart, selectionEnd); |
| } |
| |
| engine.addToSceneGraph(this, style, styleColor); |
| } |
| |
| void QQuickTextNode::deleteContent() |
| { |
| while (firstChild() != nullptr) |
| delete firstChild(); |
| m_cursorNode = nullptr; |
| qDeleteAll(m_textures); |
| m_textures.clear(); |
| } |
| |
| QT_END_NAMESPACE |
