1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qsginternaltextnode_p.h"
5
6#include "qquicktextnodeengine_p.h"
7
8#include <private/qsgadaptationlayer_p.h>
9#include <private/qsgdistancefieldglyphnode_p.h>
10#include <private/qquickclipnode_p.h>
11#include <private/qquickitem_p.h>
12#include <private/qquicktextdocument_p.h>
13
14#include <QtCore/qpoint.h>
15#include <qtextdocument.h>
16#include <qtextlayout.h>
17#include <qabstracttextdocumentlayout.h>
18#include <private/qquickstyledtext_p.h>
19#include <private/qquicktext_p_p.h>
20#include <private/qfont_p.h>
21#include <private/qfontengine_p.h>
22
23#include <private/qtextdocumentlayout_p.h>
24#include <qhash.h>
25
26QT_BEGIN_NAMESPACE
27
28Q_DECLARE_LOGGING_CATEGORY(lcVP)
29
30/*!
31 Creates an empty QSGInternalTextNode
32*/
33QSGInternalTextNode::QSGInternalTextNode(QSGRenderContext *renderContext)
34 : m_renderContext(renderContext)
35{
36#ifdef QSG_RUNTIME_DESCRIPTION
37 qsgnode_set_description(node: this, description: QLatin1String("text"));
38#endif
39
40 static_assert(int(QSGTextNode::Normal) == int(QQuickText::Normal));
41 static_assert(int(QSGTextNode::Outline) == int(QQuickText::Outline));
42 static_assert(int(QSGTextNode::Raised) == int(QQuickText::Raised));
43 static_assert(int(QSGTextNode::Sunken) == int(QQuickText::Sunken));
44
45 static_assert(int(QSGTextNode::QtRendering) == int(QQuickText::QtRendering));
46 static_assert(int(QSGTextNode::NativeRendering) == int(QQuickText::NativeRendering));
47 static_assert(int(QSGTextNode::CurveRendering) == int(QQuickText::CurveRendering));
48}
49
50QSGInternalTextNode::~QSGInternalTextNode()
51{
52 qDeleteAll(c: m_textures);
53}
54
55QSGGlyphNode *QSGInternalTextNode::addGlyphs(const QPointF &position, const QGlyphRun &glyphs, const QColor &color,
56 QQuickText::TextStyle style, const QColor &styleColor,
57 QSGNode *parentNode)
58{
59 QRawFont font = glyphs.rawFont();
60
61 QSGTextNode::RenderType preferredRenderType = m_renderType;
62 if (m_renderType != NativeRendering) {
63 if (const QFontEngine *fe = QRawFontPrivate::get(font)->fontEngine)
64 if (fe->hasUnreliableGlyphOutline() || !fe->isSmoothlyScalable)
65 preferredRenderType = QSGTextNode::NativeRendering;
66 }
67
68 if (preferredRenderType == NativeRendering)
69 m_containsUnscalableGlyphs = true;
70
71 QSGGlyphNode *node = m_renderContext->sceneGraphContext()->createGlyphNode(rc: m_renderContext,
72 renderType: preferredRenderType,
73 renderTypeQuality: m_renderTypeQuality);
74 node->setGlyphs(position: position + QPointF(0, glyphs.rawFont().ascent()), glyphs);
75 node->setStyle(style);
76 node->setStyleColor(styleColor);
77 node->setColor(color);
78 node->update();
79
80 /* We flag the geometry as static, but we never call markVertexDataDirty
81 or markIndexDataDirty on them. This is because all text nodes are
82 discarded when a change occurs. If we start appending/removing from
83 existing geometry, then we also need to start marking the geometry as
84 dirty.
85 */
86 node->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern);
87 node->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern);
88
89 if (parentNode == nullptr)
90 parentNode = this;
91 parentNode->appendChildNode(node);
92
93 if (style == QQuickText::Outline && color.alpha() > 0 && styleColor != color) {
94 QSGGlyphNode *fillNode = m_renderContext->sceneGraphContext()->createGlyphNode(rc: m_renderContext,
95 renderType: preferredRenderType,
96 renderTypeQuality: m_renderTypeQuality);
97 fillNode->setGlyphs(position: position + QPointF(0, glyphs.rawFont().ascent()), glyphs);
98 fillNode->setStyle(QQuickText::Normal);
99 fillNode->setPreferredAntialiasingMode(QSGGlyphNode::GrayAntialiasing);
100 fillNode->setColor(color);
101 fillNode->update();
102
103 fillNode->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern);
104 fillNode->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern);
105
106 parentNode->appendChildNode(node: fillNode);
107 fillNode->setRenderOrder(node->renderOrder() + 1);
108 }
109
110 return node;
111}
112
113void QSGInternalTextNode::setCursor(const QRectF &rect, const QColor &color)
114{
115 if (m_cursorNode != nullptr)
116 delete m_cursorNode;
117
118 m_cursorNode = m_renderContext->sceneGraphContext()->createInternalRectangleNode(rect, c: color);
119 appendChildNode(node: m_cursorNode);
120}
121
122void QSGInternalTextNode::clearCursor()
123{
124 if (m_cursorNode)
125 removeChildNode(node: m_cursorNode);
126 delete m_cursorNode;
127 m_cursorNode = nullptr;
128}
129
130void QSGInternalTextNode::addDecorationNode(const QRectF &rect, const QColor &color)
131{
132 addRectangleNode(rect, color);
133}
134
135void QSGInternalTextNode::addRectangleNode(const QRectF &rect, const QColor &color)
136{
137 appendChildNode(node: m_renderContext->sceneGraphContext()->createInternalRectangleNode(rect, c: color));
138}
139
140void QSGInternalTextNode::addImage(const QRectF &rect, const QImage &image)
141{
142 QSGInternalImageNode *node = m_renderContext->sceneGraphContext()->createInternalImageNode(renderContext: m_renderContext);
143 QSGTexture *texture = m_renderContext->createTexture(image);
144 texture->setFiltering(m_filtering);
145 m_textures.append(t: texture);
146 node->setTargetRect(rect);
147 node->setInnerTargetRect(rect);
148 node->setTexture(texture);
149 node->setFiltering(m_filtering);
150 appendChildNode(node);
151 node->update();
152}
153
154void QSGInternalTextNode::doAddTextDocument(QPointF position, QTextDocument *textDocument,
155 int selectionStart, int selectionEnd)
156{
157 QQuickTextNodeEngine engine;
158 engine.setTextColor(m_color);
159 engine.setSelectedTextColor(m_selectionTextColor);
160 engine.setSelectionColor(m_selectionColor);
161 engine.setAnchorColor(m_linkColor);
162 engine.setPosition(position);
163
164 QList<QTextFrame *> frames;
165 frames.append(t: textDocument->rootFrame());
166 while (!frames.isEmpty()) {
167 QTextFrame *textFrame = frames.takeFirst();
168 frames.append(other: textFrame->childFrames());
169
170 engine.addFrameDecorations(document: textDocument, frame: textFrame);
171
172 if (textFrame->firstPosition() > textFrame->lastPosition()
173 && textFrame->frameFormat().position() != QTextFrameFormat::InFlow) {
174 const int pos = textFrame->firstPosition() - 1;
175 auto *a = static_cast<QtPrivate::ProtectedLayoutAccessor *>(textDocument->documentLayout());
176 QTextCharFormat format = a->formatAccessor(pos);
177 QRectF rect = a->frameBoundingRect(frame: textFrame);
178
179 QTextBlock block = textFrame->firstCursorPosition().block();
180 engine.setCurrentLine(block.layout()->lineForTextPosition(pos: pos - block.position()));
181 engine.addTextObject(block, position: rect.topLeft(), format, selectionState: QQuickTextNodeEngine::Unselected, textDocument,
182 pos, layoutPosition: textFrame->frameFormat().position());
183 } else {
184 QTextFrame::iterator it = textFrame->begin();
185
186 while (!it.atEnd()) {
187 Q_ASSERT(!engine.currentLine().isValid());
188
189 QTextBlock block = it.currentBlock();
190 engine.addTextBlock(textDocument, block, position, textColor: m_color, anchorColor: m_linkColor, selectionStart, selectionEnd,
191 viewport: (textDocument->characterCount() > QQuickTextPrivate::largeTextSizeThreshold ?
192 m_viewport : QRectF()));
193 ++it;
194 }
195 }
196 }
197
198 engine.addToSceneGraph(parent: this, style: QQuickText::TextStyle(m_textStyle), styleColor: m_styleColor);
199}
200
201void QSGInternalTextNode::doAddTextLayout(QPointF position, QTextLayout *textLayout,
202 int selectionStart, int selectionEnd,
203 int lineStart, int lineCount)
204{
205 QQuickTextNodeEngine engine;
206 engine.setTextColor(m_color);
207 engine.setSelectedTextColor(m_selectionTextColor);
208 engine.setSelectionColor(m_selectionColor);
209 engine.setAnchorColor(m_linkColor);
210 engine.setPosition(position);
211
212#if QT_CONFIG(im)
213 int preeditLength = textLayout->preeditAreaText().size();
214 int preeditPosition = textLayout->preeditAreaPosition();
215#endif
216
217 QVarLengthArray<QTextLayout::FormatRange> colorChanges;
218 engine.mergeFormats(textLayout, mergedFormats: &colorChanges);
219
220 lineCount = lineCount >= 0
221 ? qMin(a: lineStart + lineCount, b: textLayout->lineCount())
222 : textLayout->lineCount();
223
224 bool inViewport = false;
225 for (int i=lineStart; i<lineCount; ++i) {
226 QTextLine line = textLayout->lineAt(i);
227
228 int start = line.textStart();
229 int length = line.textLength();
230 int end = start + length;
231
232#if QT_CONFIG(im)
233 if (preeditPosition >= 0
234 && preeditPosition >= start
235 && preeditPosition < end) {
236 end += preeditLength;
237 }
238#endif
239 // If there's a lot of text, insert only the range of lines that can possibly be visible within the viewport.
240 if (m_viewport.isNull() || (line.y() + line.height() > m_viewport.top() && line.y() < m_viewport.bottom())) {
241 if (!inViewport && !m_viewport.isNull()) {
242 m_firstLineInViewport = i;
243 qCDebug(lcVP) << "first line in viewport" << i << "@" << line.y();
244 }
245 inViewport = true;
246 engine.setCurrentLine(line);
247 engine.addGlyphsForRanges(ranges: colorChanges, start, end, selectionStart, selectionEnd);
248 } else if (inViewport) {
249 Q_ASSERT(!m_viewport.isNull());
250 m_firstLinePastViewport = i;
251 qCDebug(lcVP) << "first omitted line past bottom of viewport" << i << "@" << line.y();
252 break; // went past the bottom of the viewport, so we're done
253 }
254 }
255
256 engine.addToSceneGraph(parent: this, style: QQuickText::TextStyle(m_textStyle), styleColor: m_styleColor);
257}
258
259void QSGInternalTextNode::clear()
260{
261 while (firstChild() != nullptr)
262 delete firstChild();
263 m_cursorNode = nullptr;
264 qDeleteAll(c: m_textures);
265 m_textures.clear();
266}
267
268QT_END_NAMESPACE
269

source code of qtdeclarative/src/quick/items/qsginternaltextnode.cpp