| 1 | // Copyright (C) 2019 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 | #ifndef QDOM_P_H |
| 4 | #define QDOM_P_H |
| 5 | |
| 6 | #include "qdom.h" |
| 7 | |
| 8 | #include <private/qglobal_p.h> |
| 9 | #include <qhash.h> |
| 10 | #include <qstring.h> |
| 11 | #include <qlist.h> |
| 12 | #include <qshareddata.h> |
| 13 | |
| 14 | QT_REQUIRE_CONFIG(dom); |
| 15 | |
| 16 | #include <QtCore/qxpfunctional.h> |
| 17 | |
| 18 | QT_BEGIN_NAMESPACE |
| 19 | |
| 20 | // |
| 21 | // W A R N I N G |
| 22 | // ------------- |
| 23 | // |
| 24 | // This file is not part of the Qt API. It exists for the convenience of |
| 25 | // qxml.cpp and qdom.cpp. This header file may change from version to version without |
| 26 | // notice, or even be removed. |
| 27 | // |
| 28 | // We mean it. |
| 29 | // |
| 30 | |
| 31 | /************************************************************** |
| 32 | * |
| 33 | * Private class declarations |
| 34 | * |
| 35 | **************************************************************/ |
| 36 | |
| 37 | class QDomImplementationPrivate |
| 38 | { |
| 39 | public: |
| 40 | inline QDomImplementationPrivate() {} |
| 41 | |
| 42 | QDomImplementationPrivate *clone(); |
| 43 | QAtomicInt ref; |
| 44 | static QDomImplementation::InvalidDataPolicy invalidDataPolicy; |
| 45 | }; |
| 46 | |
| 47 | class QDomNodePrivate |
| 48 | { |
| 49 | public: |
| 50 | QDomNodePrivate(QDomDocumentPrivate *, QDomNodePrivate *parent = nullptr); |
| 51 | QDomNodePrivate(QDomNodePrivate *n, bool deep); |
| 52 | virtual ~QDomNodePrivate(); |
| 53 | |
| 54 | QString nodeName() const { return name; } |
| 55 | QString nodeValue() const { return value; } |
| 56 | virtual void setNodeValue(const QString &v) { value = v; } |
| 57 | |
| 58 | QDomDocumentPrivate *ownerDocument(); |
| 59 | void setOwnerDocument(QDomDocumentPrivate *doc); |
| 60 | |
| 61 | virtual QDomNodePrivate *insertBefore(QDomNodePrivate *newChild, QDomNodePrivate *refChild); |
| 62 | virtual QDomNodePrivate *insertAfter(QDomNodePrivate *newChild, QDomNodePrivate *refChild); |
| 63 | virtual QDomNodePrivate *replaceChild(QDomNodePrivate *newChild, QDomNodePrivate *oldChild); |
| 64 | virtual QDomNodePrivate *removeChild(QDomNodePrivate *oldChild); |
| 65 | virtual QDomNodePrivate *appendChild(QDomNodePrivate *newChild); |
| 66 | |
| 67 | QDomNodePrivate *namedItem(const QString &name); |
| 68 | |
| 69 | virtual QDomNodePrivate *cloneNode(bool deep = true); |
| 70 | virtual void normalize(); |
| 71 | virtual void clear(); |
| 72 | |
| 73 | inline QDomNodePrivate *parent() const { return hasParent ? ownerNode : nullptr; } |
| 74 | inline void setParent(QDomNodePrivate *p) |
| 75 | { |
| 76 | ownerNode = p; |
| 77 | hasParent = true; |
| 78 | } |
| 79 | |
| 80 | void setNoParent() |
| 81 | { |
| 82 | ownerNode = hasParent ? (QDomNodePrivate *)ownerDocument() : nullptr; |
| 83 | hasParent = false; |
| 84 | } |
| 85 | |
| 86 | // Dynamic cast |
| 87 | bool isAttr() const { return nodeType() == QDomNode::AttributeNode; } |
| 88 | bool isCDATASection() const { return nodeType() == QDomNode::CDATASectionNode; } |
| 89 | bool isDocumentFragment() const { return nodeType() == QDomNode::DocumentFragmentNode; } |
| 90 | bool isDocument() const { return nodeType() == QDomNode::DocumentNode; } |
| 91 | bool isDocumentType() const { return nodeType() == QDomNode::DocumentTypeNode; } |
| 92 | bool isElement() const { return nodeType() == QDomNode::ElementNode; } |
| 93 | bool isEntityReference() const { return nodeType() == QDomNode::EntityReferenceNode; } |
| 94 | bool isText() const |
| 95 | { |
| 96 | const QDomNode::NodeType nt = nodeType(); |
| 97 | return (nt == QDomNode::TextNode) || (nt == QDomNode::CDATASectionNode); |
| 98 | } |
| 99 | bool isEntity() const { return nodeType() == QDomNode::EntityNode; } |
| 100 | bool isNotation() const { return nodeType() == QDomNode::NotationNode; } |
| 101 | bool isProcessingInstruction() const |
| 102 | { |
| 103 | return nodeType() == QDomNode::ProcessingInstructionNode; |
| 104 | } |
| 105 | bool isCharacterData() const |
| 106 | { |
| 107 | const QDomNode::NodeType nt = nodeType(); |
| 108 | return (nt == QDomNode::CharacterDataNode) || (nt == QDomNode::TextNode) |
| 109 | || (nt == QDomNode::CommentNode); |
| 110 | } |
| 111 | bool () const { return nodeType() == QDomNode::CommentNode; } |
| 112 | |
| 113 | virtual QDomNode::NodeType nodeType() const { return QDomNode::BaseNode; } |
| 114 | |
| 115 | void saveSubTree(const QDomNodePrivate *n, QTextStream &s, int depth, int indent) const; |
| 116 | virtual void save(QTextStream &, int, int) const {} |
| 117 | virtual void afterSave(QTextStream &, int, int) const {} |
| 118 | |
| 119 | void setLocation(int lineNumber, int columnNumber); |
| 120 | |
| 121 | // Variables |
| 122 | QAtomicInt ref; |
| 123 | QDomNodePrivate *prev; |
| 124 | QDomNodePrivate *next; |
| 125 | QDomNodePrivate *ownerNode; // either the node's parent or the node's owner document |
| 126 | QDomNodePrivate *first; |
| 127 | QDomNodePrivate *last; |
| 128 | |
| 129 | QString name; // this is the local name if prefix != null |
| 130 | QString value; |
| 131 | QString prefix; // set this only for ElementNode and AttributeNode |
| 132 | QString namespaceURI; // set this only for ElementNode and AttributeNode |
| 133 | bool createdWithDom1Interface : 1; |
| 134 | bool hasParent : 1; |
| 135 | |
| 136 | int lineNumber; |
| 137 | int columnNumber; |
| 138 | }; |
| 139 | |
| 140 | class QDomNodeListPrivate |
| 141 | { |
| 142 | public: |
| 143 | QDomNodeListPrivate(QDomNodePrivate *); |
| 144 | QDomNodeListPrivate(QDomNodePrivate *, const QString &); |
| 145 | QDomNodeListPrivate(QDomNodePrivate *, const QString &, const QString &); |
| 146 | ~QDomNodeListPrivate(); |
| 147 | |
| 148 | bool operator==(const QDomNodeListPrivate &) const noexcept; |
| 149 | |
| 150 | void createList() const; |
| 151 | bool checkNode(QDomNodePrivate* p) const; |
| 152 | QDomNodePrivate *findNextInOrder(QDomNodePrivate* p) const; |
| 153 | QDomNodePrivate *findPrevInOrder(QDomNodePrivate* p) const; |
| 154 | void forEachNode(qxp::function_ref<void(QDomNodePrivate*)> yield) const; |
| 155 | bool maybeCreateList() const; |
| 156 | QDomNodePrivate *item(int index); |
| 157 | int length() const; |
| 158 | int noexceptLength() const noexcept; |
| 159 | |
| 160 | QAtomicInt ref; |
| 161 | /* |
| 162 | This list contains the children of this node. |
| 163 | */ |
| 164 | QDomNodePrivate *node_impl; |
| 165 | QString tagname; |
| 166 | QString nsURI; |
| 167 | mutable QList<QDomNodePrivate *> list; |
| 168 | mutable long timestamp; |
| 169 | }; |
| 170 | |
| 171 | class QDomNamedNodeMapPrivate |
| 172 | { |
| 173 | public: |
| 174 | QDomNamedNodeMapPrivate(QDomNodePrivate *); |
| 175 | ~QDomNamedNodeMapPrivate(); |
| 176 | |
| 177 | QDomNodePrivate *namedItem(const QString &name) const; |
| 178 | QDomNodePrivate *namedItemNS(const QString &nsURI, const QString &localName) const; |
| 179 | QDomNodePrivate *setNamedItem(QDomNodePrivate *arg); |
| 180 | QDomNodePrivate *setNamedItemNS(QDomNodePrivate *arg); |
| 181 | QDomNodePrivate *removeNamedItem(const QString &name); |
| 182 | QDomNodePrivate *item(int index) const; |
| 183 | int length() const; |
| 184 | bool contains(const QString &name) const; |
| 185 | bool containsNS(const QString &nsURI, const QString &localName) const; |
| 186 | |
| 187 | /** |
| 188 | * Remove all children from the map. |
| 189 | */ |
| 190 | void clearMap(); |
| 191 | bool isReadOnly() { return readonly; } |
| 192 | void setReadOnly(bool r) { readonly = r; } |
| 193 | bool isAppendToParent() { return appendToParent; } |
| 194 | /** |
| 195 | * If true, then the node will redirect insert/remove calls |
| 196 | * to its parent by calling QDomNodePrivate::appendChild or removeChild. |
| 197 | * In addition the map won't increase or decrease the reference count |
| 198 | * of the nodes it contains. |
| 199 | * |
| 200 | * By default this value is false and the map will handle reference counting |
| 201 | * by itself. |
| 202 | */ |
| 203 | void setAppendToParent(bool b) { appendToParent = b; } |
| 204 | |
| 205 | /** |
| 206 | * Creates a copy of the map. It is a deep copy |
| 207 | * that means that all children are cloned. |
| 208 | */ |
| 209 | QDomNamedNodeMapPrivate *clone(QDomNodePrivate *parent); |
| 210 | |
| 211 | // Variables |
| 212 | QAtomicInt ref; |
| 213 | QMultiHash<QString, QDomNodePrivate *> map; |
| 214 | QDomNodePrivate *parent; |
| 215 | bool readonly; |
| 216 | bool appendToParent; |
| 217 | }; |
| 218 | |
| 219 | class QDomDocumentTypePrivate : public QDomNodePrivate |
| 220 | { |
| 221 | public: |
| 222 | QDomDocumentTypePrivate(QDomDocumentPrivate *, QDomNodePrivate *parent = nullptr); |
| 223 | QDomDocumentTypePrivate(QDomDocumentTypePrivate *n, bool deep); |
| 224 | ~QDomDocumentTypePrivate(); |
| 225 | void init(); |
| 226 | |
| 227 | // Reimplemented from QDomNodePrivate |
| 228 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 229 | QDomNodePrivate *insertBefore(QDomNodePrivate *newChild, QDomNodePrivate *refChild) override; |
| 230 | QDomNodePrivate *insertAfter(QDomNodePrivate *newChild, QDomNodePrivate *refChild) override; |
| 231 | QDomNodePrivate *replaceChild(QDomNodePrivate *newChild, QDomNodePrivate *oldChild) override; |
| 232 | QDomNodePrivate *removeChild(QDomNodePrivate *oldChild) override; |
| 233 | QDomNodePrivate *appendChild(QDomNodePrivate *newChild) override; |
| 234 | |
| 235 | QDomNode::NodeType nodeType() const override { return QDomNode::DocumentTypeNode; } |
| 236 | |
| 237 | void save(QTextStream &s, int, int) const override; |
| 238 | |
| 239 | // Variables |
| 240 | QDomNamedNodeMapPrivate *entities; |
| 241 | QDomNamedNodeMapPrivate *notations; |
| 242 | QString publicId; |
| 243 | QString systemId; |
| 244 | QString internalSubset; |
| 245 | }; |
| 246 | |
| 247 | class QDomDocumentFragmentPrivate : public QDomNodePrivate |
| 248 | { |
| 249 | public: |
| 250 | QDomDocumentFragmentPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent = nullptr); |
| 251 | QDomDocumentFragmentPrivate(QDomNodePrivate *n, bool deep); |
| 252 | |
| 253 | // Reimplemented from QDomNodePrivate |
| 254 | virtual QDomNodePrivate *cloneNode(bool deep = true) override; |
| 255 | QDomNode::NodeType nodeType() const override { return QDomNode::DocumentFragmentNode; } |
| 256 | }; |
| 257 | |
| 258 | class QDomCharacterDataPrivate : public QDomNodePrivate |
| 259 | { |
| 260 | public: |
| 261 | QDomCharacterDataPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &data); |
| 262 | QDomCharacterDataPrivate(QDomCharacterDataPrivate *n, bool deep); |
| 263 | |
| 264 | int dataLength() const; |
| 265 | QString substringData(unsigned long offset, unsigned long count) const; |
| 266 | void appendData(const QString &arg); |
| 267 | void insertData(unsigned long offset, const QString &arg); |
| 268 | void deleteData(unsigned long offset, unsigned long count); |
| 269 | void replaceData(unsigned long offset, unsigned long count, const QString &arg); |
| 270 | |
| 271 | // Reimplemented from QDomNodePrivate |
| 272 | QDomNode::NodeType nodeType() const override { return QDomNode::CharacterDataNode; } |
| 273 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 274 | }; |
| 275 | |
| 276 | class QDomTextPrivate : public QDomCharacterDataPrivate |
| 277 | { |
| 278 | public: |
| 279 | QDomTextPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &val); |
| 280 | QDomTextPrivate(QDomTextPrivate *n, bool deep); |
| 281 | |
| 282 | QDomTextPrivate *splitText(int offset); |
| 283 | |
| 284 | // Reimplemented from QDomNodePrivate |
| 285 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 286 | QDomNode::NodeType nodeType() const override { return QDomNode::TextNode; } |
| 287 | virtual void save(QTextStream &s, int, int) const override; |
| 288 | }; |
| 289 | |
| 290 | class QDomAttrPrivate : public QDomNodePrivate |
| 291 | { |
| 292 | public: |
| 293 | QDomAttrPrivate(QDomDocumentPrivate *, QDomNodePrivate *, const QString &name); |
| 294 | QDomAttrPrivate(QDomDocumentPrivate *, QDomNodePrivate *, const QString &nsURI, |
| 295 | const QString &qName); |
| 296 | QDomAttrPrivate(QDomAttrPrivate *n, bool deep); |
| 297 | |
| 298 | bool specified() const; |
| 299 | |
| 300 | // Reimplemented from QDomNodePrivate |
| 301 | void setNodeValue(const QString &v) override; |
| 302 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 303 | QDomNode::NodeType nodeType() const override { return QDomNode::AttributeNode; } |
| 304 | virtual void save(QTextStream &s, int, int) const override; |
| 305 | |
| 306 | // Variables |
| 307 | bool m_specified; |
| 308 | }; |
| 309 | |
| 310 | class QDomElementPrivate : public QDomNodePrivate |
| 311 | { |
| 312 | public: |
| 313 | QDomElementPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &name); |
| 314 | QDomElementPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &nsURI, |
| 315 | const QString &qName); |
| 316 | QDomElementPrivate(QDomElementPrivate *n, bool deep); |
| 317 | ~QDomElementPrivate(); |
| 318 | |
| 319 | QString attribute(const QString &name, const QString &defValue) const; |
| 320 | QString attributeNS(const QString &nsURI, const QString &localName, |
| 321 | const QString &defValue) const; |
| 322 | void setAttribute(const QString &name, const QString &value); |
| 323 | void setAttributeNS(const QString &nsURI, const QString &qName, const QString &newValue); |
| 324 | void removeAttribute(const QString &name); |
| 325 | QDomAttrPrivate *attributeNode(const QString &name); |
| 326 | QDomAttrPrivate *attributeNodeNS(const QString &nsURI, const QString &localName); |
| 327 | QDomAttrPrivate *setAttributeNode(QDomAttrPrivate *newAttr); |
| 328 | QDomAttrPrivate *setAttributeNodeNS(QDomAttrPrivate *newAttr); |
| 329 | QDomAttrPrivate *removeAttributeNode(QDomAttrPrivate *oldAttr); |
| 330 | bool hasAttribute(const QString &name); |
| 331 | bool hasAttributeNS(const QString &nsURI, const QString &localName); |
| 332 | |
| 333 | QString text(); |
| 334 | |
| 335 | // Reimplemented from QDomNodePrivate |
| 336 | QDomNamedNodeMapPrivate *attributes() { return m_attr; } |
| 337 | bool hasAttributes() { return (m_attr->length() > 0); } |
| 338 | QDomNode::NodeType nodeType() const override { return QDomNode::ElementNode; } |
| 339 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 340 | virtual void save(QTextStream &s, int, int) const override; |
| 341 | virtual void afterSave(QTextStream &s, int, int) const override; |
| 342 | |
| 343 | // Variables |
| 344 | QDomNamedNodeMapPrivate *m_attr; |
| 345 | }; |
| 346 | |
| 347 | class : public QDomCharacterDataPrivate |
| 348 | { |
| 349 | public: |
| 350 | (QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &val); |
| 351 | (QDomCommentPrivate *n, bool deep); |
| 352 | |
| 353 | // Reimplemented from QDomNodePrivate |
| 354 | QDomNodePrivate *(bool deep = true) override; |
| 355 | QDomNode::NodeType () const override { return QDomNode::CommentNode; } |
| 356 | virtual void (QTextStream &s, int, int) const override; |
| 357 | }; |
| 358 | |
| 359 | class QDomCDATASectionPrivate : public QDomTextPrivate |
| 360 | { |
| 361 | public: |
| 362 | QDomCDATASectionPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &val); |
| 363 | QDomCDATASectionPrivate(QDomCDATASectionPrivate *n, bool deep); |
| 364 | |
| 365 | // Reimplemented from QDomNodePrivate |
| 366 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 367 | QDomNode::NodeType nodeType() const override { return QDomNode::CDATASectionNode; } |
| 368 | virtual void save(QTextStream &s, int, int) const override; |
| 369 | }; |
| 370 | |
| 371 | class QDomNotationPrivate : public QDomNodePrivate |
| 372 | { |
| 373 | public: |
| 374 | QDomNotationPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &name, |
| 375 | const QString &pub, const QString &sys); |
| 376 | QDomNotationPrivate(QDomNotationPrivate *n, bool deep); |
| 377 | |
| 378 | // Reimplemented from QDomNodePrivate |
| 379 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 380 | QDomNode::NodeType nodeType() const override { return QDomNode::NotationNode; } |
| 381 | virtual void save(QTextStream &s, int, int) const override; |
| 382 | |
| 383 | // Variables |
| 384 | QString m_sys; |
| 385 | QString m_pub; |
| 386 | }; |
| 387 | |
| 388 | class QDomEntityPrivate : public QDomNodePrivate |
| 389 | { |
| 390 | public: |
| 391 | QDomEntityPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &name, |
| 392 | const QString &pub, const QString &sys, const QString ¬ation); |
| 393 | QDomEntityPrivate(QDomEntityPrivate *n, bool deep); |
| 394 | |
| 395 | // Reimplemented from QDomNodePrivate |
| 396 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 397 | QDomNode::NodeType nodeType() const override { return QDomNode::EntityNode; } |
| 398 | virtual void save(QTextStream &s, int, int) const override; |
| 399 | |
| 400 | // Variables |
| 401 | QString m_sys; |
| 402 | QString m_pub; |
| 403 | QString m_notationName; |
| 404 | }; |
| 405 | |
| 406 | class QDomEntityReferencePrivate : public QDomNodePrivate |
| 407 | { |
| 408 | public: |
| 409 | QDomEntityReferencePrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, const QString &name); |
| 410 | QDomEntityReferencePrivate(QDomNodePrivate *n, bool deep); |
| 411 | |
| 412 | // Reimplemented from QDomNodePrivate |
| 413 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 414 | QDomNode::NodeType nodeType() const override { return QDomNode::EntityReferenceNode; } |
| 415 | virtual void save(QTextStream &s, int, int) const override; |
| 416 | }; |
| 417 | |
| 418 | class QDomProcessingInstructionPrivate : public QDomNodePrivate |
| 419 | { |
| 420 | public: |
| 421 | QDomProcessingInstructionPrivate(QDomDocumentPrivate *, QDomNodePrivate *parent, |
| 422 | const QString &target, const QString &data); |
| 423 | QDomProcessingInstructionPrivate(QDomProcessingInstructionPrivate *n, bool deep); |
| 424 | |
| 425 | // Reimplemented from QDomNodePrivate |
| 426 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 427 | QDomNode::NodeType nodeType() const override { return QDomNode::ProcessingInstructionNode; } |
| 428 | virtual void save(QTextStream &s, int, int) const override; |
| 429 | }; |
| 430 | |
| 431 | class QDomDocumentPrivate : public QDomNodePrivate |
| 432 | { |
| 433 | public: |
| 434 | QDomDocumentPrivate(); |
| 435 | QDomDocumentPrivate(const QString &name); |
| 436 | QDomDocumentPrivate(QDomDocumentTypePrivate *dt); |
| 437 | QDomDocumentPrivate(QDomDocumentPrivate *n, bool deep); |
| 438 | ~QDomDocumentPrivate(); |
| 439 | |
| 440 | QDomDocument::ParseResult setContent(QXmlStreamReader *reader, |
| 441 | QDomDocument::ParseOptions options); |
| 442 | |
| 443 | // Attributes |
| 444 | QDomDocumentTypePrivate *doctype() { return type.data(); } |
| 445 | QDomImplementationPrivate *implementation() { return impl.data(); } |
| 446 | QDomElementPrivate *documentElement(); |
| 447 | |
| 448 | // Factories |
| 449 | QDomElementPrivate *createElement(const QString &tagName); |
| 450 | QDomElementPrivate *createElementNS(const QString &nsURI, const QString &qName); |
| 451 | QDomDocumentFragmentPrivate *createDocumentFragment(); |
| 452 | QDomTextPrivate *createTextNode(const QString &data); |
| 453 | QDomCommentPrivate *(const QString &data); |
| 454 | QDomCDATASectionPrivate *createCDATASection(const QString &data); |
| 455 | QDomProcessingInstructionPrivate *createProcessingInstruction(const QString &target, |
| 456 | const QString &data); |
| 457 | QDomAttrPrivate *createAttribute(const QString &name); |
| 458 | QDomAttrPrivate *createAttributeNS(const QString &nsURI, const QString &qName); |
| 459 | QDomEntityReferencePrivate *createEntityReference(const QString &name); |
| 460 | |
| 461 | QDomNodePrivate *importNode(QDomNodePrivate *importedNode, bool deep); |
| 462 | |
| 463 | // Reimplemented from QDomNodePrivate |
| 464 | QDomNodePrivate *cloneNode(bool deep = true) override; |
| 465 | QDomNode::NodeType nodeType() const override { return QDomNode::DocumentNode; } |
| 466 | void clear() override; |
| 467 | |
| 468 | // Variables |
| 469 | QExplicitlySharedDataPointer<QDomImplementationPrivate> impl; |
| 470 | QExplicitlySharedDataPointer<QDomDocumentTypePrivate> type; |
| 471 | |
| 472 | void saveDocument(QTextStream &stream, const int indent, |
| 473 | QDomNode::EncodingPolicy encUsed) const; |
| 474 | |
| 475 | /* \internal |
| 476 | Counter for the QDomNodeListPrivate timestamps. |
| 477 | |
| 478 | This is a cache optimization, that might in some cases be effective. The |
| 479 | dilemma is that QDomNode::childNodes() returns a list, but the |
| 480 | implementation stores the children in a linked list. Hence, in order to |
| 481 | get the children out through childNodes(), a list must be populated each |
| 482 | time, which is O(N). |
| 483 | |
| 484 | DOM has the requirement of node references being live, see DOM Core |
| 485 | Level 3, 1.1.1 The DOM Structure Model, which means that changes to the |
| 486 | underlying documents must be reflected in node lists. |
| 487 | |
| 488 | This mechanism, nodeListTime, is a caching optimization that reduces the |
| 489 | amount of times the node list is rebuilt, by only doing so when the |
| 490 | document actually changes. However, a change to anywhere in any document |
| 491 | invalidate all lists, since no dependency tracking is done. |
| 492 | |
| 493 | It functions by that all modifying functions(insertBefore() and so on) |
| 494 | increment the count; each QDomNodeListPrivate copies nodeListTime on |
| 495 | construction, and compares its own value to nodeListTime in order to |
| 496 | determine whether it needs to rebuild. |
| 497 | |
| 498 | This is reentrant. The nodeListTime may overflow, but that's ok since we |
| 499 | check for equalness, not whether nodeListTime is smaller than the list's |
| 500 | stored timestamp. |
| 501 | */ |
| 502 | long nodeListTime; |
| 503 | }; |
| 504 | |
| 505 | QT_END_NAMESPACE |
| 506 | |
| 507 | #endif // QDOMHELPERS_P_H |
| 508 | |