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 "qquicktextnode_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 | #include <QtQuick/private/qsgcontext_p.h> |
14 | |
15 | #include <QtCore/qpoint.h> |
16 | #include <qtextdocument.h> |
17 | #include <qtextlayout.h> |
18 | #include <qabstracttextdocumentlayout.h> |
19 | #include <private/qquickstyledtext_p.h> |
20 | #include <private/qquicktext_p_p.h> |
21 | #include <private/qfont_p.h> |
22 | #include <private/qfontengine_p.h> |
23 | |
24 | #include <private/qtextdocumentlayout_p.h> |
25 | #include <qhash.h> |
26 | |
27 | QT_BEGIN_NAMESPACE |
28 | |
29 | Q_DECLARE_LOGGING_CATEGORY(lcVP) |
30 | |
31 | /*! |
32 | Creates an empty QQuickTextNode |
33 | */ |
34 | QQuickTextNode::QQuickTextNode(QQuickItem *ownerElement) |
35 | : m_cursorNode(nullptr), m_ownerElement(ownerElement), m_useNativeRenderer(false), m_renderTypeQuality(-1) |
36 | { |
37 | #ifdef QSG_RUNTIME_DESCRIPTION |
38 | qsgnode_set_description(node: this, description: QLatin1String("text" )); |
39 | #endif |
40 | } |
41 | |
42 | QQuickTextNode::~QQuickTextNode() |
43 | { |
44 | qDeleteAll(c: m_textures); |
45 | } |
46 | |
47 | QSGGlyphNode *QQuickTextNode::addGlyphs(const QPointF &position, const QGlyphRun &glyphs, const QColor &color, |
48 | QQuickText::TextStyle style, const QColor &styleColor, |
49 | QSGNode *parentNode) |
50 | { |
51 | QSGRenderContext *sg = QQuickItemPrivate::get(item: m_ownerElement)->sceneGraphRenderContext(); |
52 | QRawFont font = glyphs.rawFont(); |
53 | bool preferNativeGlyphNode = m_useNativeRenderer; |
54 | if (!preferNativeGlyphNode) { |
55 | QRawFontPrivate *fontPriv = QRawFontPrivate::get(font); |
56 | if (fontPriv->fontEngine->hasUnreliableGlyphOutline()) { |
57 | preferNativeGlyphNode = true; |
58 | } else { |
59 | QFontEngine *fe = QRawFontPrivate::get(font)->fontEngine; |
60 | preferNativeGlyphNode = !fe->isSmoothlyScalable; |
61 | } |
62 | } |
63 | |
64 | QSGGlyphNode *node = sg->sceneGraphContext()->createGlyphNode(rc: sg, preferNativeGlyphNode, renderTypeQuality: m_renderTypeQuality); |
65 | |
66 | node->setOwnerElement(m_ownerElement); |
67 | node->setGlyphs(position: position + QPointF(0, glyphs.rawFont().ascent()), glyphs); |
68 | node->setStyle(style); |
69 | node->setStyleColor(styleColor); |
70 | node->setColor(color); |
71 | node->update(); |
72 | |
73 | /* We flag the geometry as static, but we never call markVertexDataDirty |
74 | or markIndexDataDirty on them. This is because all text nodes are |
75 | discarded when a change occurs. If we start appending/removing from |
76 | existing geometry, then we also need to start marking the geometry as |
77 | dirty. |
78 | */ |
79 | node->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern); |
80 | node->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern); |
81 | |
82 | if (parentNode == nullptr) |
83 | parentNode = this; |
84 | parentNode->appendChildNode(node); |
85 | |
86 | if (style == QQuickText::Outline && color.alpha() > 0 && styleColor != color) { |
87 | QSGGlyphNode *fillNode = sg->sceneGraphContext()->createGlyphNode(rc: sg, preferNativeGlyphNode, renderTypeQuality: m_renderTypeQuality); |
88 | fillNode->setOwnerElement(m_ownerElement); |
89 | fillNode->setGlyphs(position: position + QPointF(0, glyphs.rawFont().ascent()), glyphs); |
90 | fillNode->setStyle(QQuickText::Normal); |
91 | fillNode->setPreferredAntialiasingMode(QSGGlyphNode::GrayAntialiasing); |
92 | fillNode->setColor(color); |
93 | fillNode->update(); |
94 | |
95 | fillNode->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern); |
96 | fillNode->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern); |
97 | |
98 | parentNode->appendChildNode(node: fillNode); |
99 | fillNode->setRenderOrder(node->renderOrder() + 1); |
100 | } |
101 | |
102 | return node; |
103 | } |
104 | |
105 | void QQuickTextNode::setCursor(const QRectF &rect, const QColor &color) |
106 | { |
107 | if (m_cursorNode != nullptr) |
108 | delete m_cursorNode; |
109 | |
110 | QSGRenderContext *sg = QQuickItemPrivate::get(item: m_ownerElement)->sceneGraphRenderContext(); |
111 | m_cursorNode = sg->sceneGraphContext()->createInternalRectangleNode(rect, c: color); |
112 | appendChildNode(node: m_cursorNode); |
113 | } |
114 | |
115 | void QQuickTextNode::clearCursor() |
116 | { |
117 | if (m_cursorNode) |
118 | removeChildNode(node: m_cursorNode); |
119 | delete m_cursorNode; |
120 | m_cursorNode = nullptr; |
121 | } |
122 | |
123 | void QQuickTextNode::addRectangleNode(const QRectF &rect, const QColor &color) |
124 | { |
125 | QSGRenderContext *sg = QQuickItemPrivate::get(item: m_ownerElement)->sceneGraphRenderContext(); |
126 | appendChildNode(node: sg->sceneGraphContext()->createInternalRectangleNode(rect, c: color)); |
127 | } |
128 | |
129 | |
130 | void QQuickTextNode::addImage(const QRectF &rect, const QImage &image) |
131 | { |
132 | QSGRenderContext *sg = QQuickItemPrivate::get(item: m_ownerElement)->sceneGraphRenderContext(); |
133 | QSGInternalImageNode *node = sg->sceneGraphContext()->createInternalImageNode(renderContext: sg); |
134 | QSGTexture *texture = sg->createTexture(image); |
135 | if (m_ownerElement->smooth()) |
136 | texture->setFiltering(QSGTexture::Linear); |
137 | m_textures.append(t: texture); |
138 | node->setTargetRect(rect); |
139 | node->setInnerTargetRect(rect); |
140 | node->setTexture(texture); |
141 | if (m_ownerElement->smooth()) |
142 | node->setFiltering(QSGTexture::Linear); |
143 | appendChildNode(node); |
144 | node->update(); |
145 | } |
146 | |
147 | void QQuickTextNode::addTextDocument(const QPointF &position, QTextDocument *textDocument, |
148 | const QColor &textColor, |
149 | QQuickText::TextStyle style, const QColor &styleColor, |
150 | const QColor &anchorColor, |
151 | const QColor &selectionColor, const QColor &selectedTextColor, |
152 | int selectionStart, int selectionEnd) |
153 | { |
154 | QQuickTextNodeEngine engine; |
155 | engine.setTextColor(textColor); |
156 | engine.setSelectedTextColor(selectedTextColor); |
157 | engine.setSelectionColor(selectionColor); |
158 | engine.setAnchorColor(anchorColor); |
159 | engine.setPosition(position); |
160 | |
161 | QList<QTextFrame *> frames; |
162 | frames.append(t: textDocument->rootFrame()); |
163 | while (!frames.isEmpty()) { |
164 | QTextFrame *textFrame = frames.takeFirst(); |
165 | frames.append(other: textFrame->childFrames()); |
166 | |
167 | engine.addFrameDecorations(document: textDocument, frame: textFrame); |
168 | |
169 | if (textFrame->firstPosition() > textFrame->lastPosition() |
170 | && textFrame->frameFormat().position() != QTextFrameFormat::InFlow) { |
171 | const int pos = textFrame->firstPosition() - 1; |
172 | auto *a = static_cast<QtPrivate::ProtectedLayoutAccessor *>(textDocument->documentLayout()); |
173 | QTextCharFormat format = a->formatAccessor(pos); |
174 | QRectF rect = a->frameBoundingRect(frame: textFrame); |
175 | |
176 | QTextBlock block = textFrame->firstCursorPosition().block(); |
177 | engine.setCurrentLine(block.layout()->lineForTextPosition(pos: pos - block.position())); |
178 | engine.addTextObject(block, position: rect.topLeft(), format, selectionState: QQuickTextNodeEngine::Unselected, textDocument, |
179 | pos, layoutPosition: textFrame->frameFormat().position()); |
180 | } else { |
181 | QTextFrame::iterator it = textFrame->begin(); |
182 | |
183 | while (!it.atEnd()) { |
184 | Q_ASSERT(!engine.currentLine().isValid()); |
185 | |
186 | QTextBlock block = it.currentBlock(); |
187 | engine.addTextBlock(textDocument, block, position, textColor, anchorColor, selectionStart, selectionEnd, |
188 | viewport: (textDocument->characterCount() > QQuickTextPrivate::largeTextSizeThreshold ? |
189 | m_ownerElement->clipRect() : QRectF())); |
190 | ++it; |
191 | } |
192 | } |
193 | } |
194 | |
195 | engine.addToSceneGraph(parent: this, style, styleColor); |
196 | } |
197 | |
198 | void QQuickTextNode::addTextLayout(const QPointF &position, QTextLayout *textLayout, const QColor &color, |
199 | QQuickText::TextStyle style, const QColor &styleColor, |
200 | const QColor &anchorColor, |
201 | const QColor &selectionColor, const QColor &selectedTextColor, |
202 | int selectionStart, int selectionEnd, |
203 | int lineStart, int lineCount) |
204 | { |
205 | QQuickTextNodeEngine engine; |
206 | engine.setTextColor(color); |
207 | engine.setSelectedTextColor(selectedTextColor); |
208 | engine.setSelectionColor(selectionColor); |
209 | engine.setAnchorColor(anchorColor); |
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 | // If there's a lot of text, insert only the range of lines that can possibly be visible within the viewport. |
221 | QRectF viewport; |
222 | if (m_ownerElement->flags().testFlag(flag: QQuickItem::ItemObservesViewport)) { |
223 | viewport = m_ownerElement->clipRect(); |
224 | qCDebug(lcVP) << "text viewport" << viewport; |
225 | } |
226 | lineCount = lineCount >= 0 |
227 | ? qMin(a: lineStart + lineCount, b: textLayout->lineCount()) |
228 | : textLayout->lineCount(); |
229 | |
230 | bool inViewport = false; |
231 | for (int i=lineStart; i<lineCount; ++i) { |
232 | QTextLine line = textLayout->lineAt(i); |
233 | |
234 | int start = line.textStart(); |
235 | int length = line.textLength(); |
236 | int end = start + length; |
237 | |
238 | #if QT_CONFIG(im) |
239 | if (preeditPosition >= 0 |
240 | && preeditPosition >= start |
241 | && preeditPosition < end) { |
242 | end += preeditLength; |
243 | } |
244 | #endif |
245 | if (viewport.isNull() || (line.y() + line.height() > viewport.top() && line.y() < viewport.bottom())) { |
246 | if (!inViewport && !viewport.isNull()) { |
247 | m_firstLineInViewport = i; |
248 | qCDebug(lcVP) << "first line in viewport" << i << "@" << line.y(); |
249 | } |
250 | inViewport = true; |
251 | engine.setCurrentLine(line); |
252 | engine.addGlyphsForRanges(ranges: colorChanges, start, end, selectionStart, selectionEnd); |
253 | } else if (inViewport) { |
254 | Q_ASSERT(!viewport.isNull()); |
255 | m_firstLinePastViewport = i; |
256 | qCDebug(lcVP) << "first omitted line past bottom of viewport" << i << "@" << line.y(); |
257 | break; // went past the bottom of the viewport, so we're done |
258 | } |
259 | } |
260 | |
261 | engine.addToSceneGraph(parent: this, style, styleColor); |
262 | } |
263 | |
264 | void QQuickTextNode::deleteContent() |
265 | { |
266 | while (firstChild() != nullptr) |
267 | delete firstChild(); |
268 | m_cursorNode = nullptr; |
269 | qDeleteAll(c: m_textures); |
270 | m_textures.clear(); |
271 | } |
272 | |
273 | QT_END_NAMESPACE |
274 | |