📄 html_documentimpl.cpp
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// first(IE)/last(Moz/Konq) registered onload on a <frameset>. //kdDebug() << "dispatching LOAD_EVENT on document " << getDocument() << " " << (view()?view()->part()->name():0) << endl; //Make sure to flush any pending image events now, as we want them out before the document's load event dispatchImageLoadEventsNow(); getDocument()->dispatchWindowEvent(EventImpl::LOAD_EVENT, false, false); // don't update rendering if we're going to redirect anyway if ( view() && ( view()->part()->d->m_redirectURL.isNull() || view()->part()->d->m_delayRedirect > 1 ) ) updateRendering(); }}const int PARSEMODE_HAVE_DOCTYPE = (1<<0);const int PARSEMODE_HAVE_PUBLIC_ID = (1<<1);const int PARSEMODE_HAVE_SYSTEM_ID = (1<<2);const int PARSEMODE_HAVE_INTERNAL = (1<<3);static int parseDocTypePart(const QString& buffer, int index){ while (true) { QChar ch = buffer[index]; if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') ++index; else if (ch == '-') { int tmpIndex=index; if (buffer[index+1] == '-' && ((tmpIndex=buffer.find("--", index+2)) != -1)) index = tmpIndex+2; else return index; } else return index; }}static bool containsString(const char* str, const QString& buffer, int offset){ QString startString(str); if (offset + startString.length() > buffer.length()) return false; QString bufferString = buffer.mid(offset, startString.length()).lower(); QString lowerStart = startString.lower(); return bufferString.startsWith(lowerStart);}static bool parseDocTypeDeclaration(const QString& buffer, int* resultFlags, QString& publicID, QString& systemID){ bool haveDocType = false; *resultFlags = 0; // Skip through any comments and processing instructions. int index = 0; do { index = buffer.find('<', index); if (index == -1) break; QChar nextChar = buffer[index+1]; if (nextChar == '!') { if (containsString("doctype", buffer, index+2)) { haveDocType = true; index += 9; // Skip "<!DOCTYPE" break; } index = parseDocTypePart(buffer,index); index = buffer.find('>', index); } else if (nextChar == '?') index = buffer.find('>', index); else break; } while (index != -1); if (!haveDocType) return true; *resultFlags |= PARSEMODE_HAVE_DOCTYPE; index = parseDocTypePart(buffer, index); if (!containsString("html", buffer, index)) return false; index = parseDocTypePart(buffer, index+4); bool hasPublic = containsString("public", buffer, index); if (hasPublic) { index = parseDocTypePart(buffer, index+6); // We've read <!DOCTYPE HTML PUBLIC (not case sensitive). // Now we find the beginning and end of the public identifers // and system identifiers (assuming they're even present). QChar theChar = buffer[index]; if (theChar != '\"' && theChar != '\'') return false; // |start| is the first character (after the quote) and |end| // is the final quote, so there are |end|-|start| characters. int publicIDStart = index+1; int publicIDEnd = buffer.find(theChar, publicIDStart); if (publicIDEnd == -1) return false; index = parseDocTypePart(buffer, publicIDEnd+1); QChar next = buffer[index]; if (next == '>') { // Public identifier present, but no system identifier. // Do nothing. Note that this is the most common // case. } else if (next == '\"' || next == '\'') { // We have a system identifier. *resultFlags |= PARSEMODE_HAVE_SYSTEM_ID; int systemIDStart = index+1; int systemIDEnd = buffer.find(next, systemIDStart); if (systemIDEnd == -1) return false; systemID = buffer.mid(systemIDStart, systemIDEnd - systemIDStart); } else if (next == '[') { // We found an internal subset. *resultFlags |= PARSEMODE_HAVE_INTERNAL; } else return false; // Something's wrong. // We need to trim whitespace off the public identifier. publicID = buffer.mid(publicIDStart, publicIDEnd - publicIDStart); publicID = publicID.stripWhiteSpace(); *resultFlags |= PARSEMODE_HAVE_PUBLIC_ID; } else { if (containsString("system", buffer, index)) { // Doctype has a system ID but no public ID *resultFlags |= PARSEMODE_HAVE_SYSTEM_ID; index = parseDocTypePart(buffer, index+6); QChar next = buffer[index]; if (next != '\"' && next != '\'') return false; int systemIDStart = index+1; int systemIDEnd = buffer.find(next, systemIDStart); if (systemIDEnd == -1) return false; systemID = buffer.mid(systemIDStart, systemIDEnd - systemIDStart); index = parseDocTypePart(buffer, systemIDEnd+1); } QChar nextChar = buffer[index]; if (nextChar == '[') *resultFlags |= PARSEMODE_HAVE_INTERNAL; else if (nextChar != '>') return false; } return true;}void HTMLDocumentImpl::determineParseMode( const QString &str ){ //kdDebug() << "DocumentImpl::determineParseMode str=" << str<< endl; int oldPMode = pMode; // This code more or less mimics Mozilla's implementation (specifically the // doctype parsing implemented by David Baron in Mozilla's nsParser.cpp). // // There are three possible parse modes: // COMPAT - quirks mode emulates WinIE // and NS4. CSS parsing is also relaxed in this mode, e.g., unit types can // be omitted from numbers. // ALMOST STRICT - This mode is identical to strict mode // except for its treatment of line-height in the inline box model. For // now (until the inline box model is re-written), this mode is identical // to STANDARDS mode. // STRICT - no quirks apply. Web pages will obey the specifications to // the letter. QString systemID, publicID; int resultFlags = 0; if (parseDocTypeDeclaration(str, &resultFlags, publicID, systemID)) { if (resultFlags & PARSEMODE_HAVE_DOCTYPE) { m_doctype->setName("HTML"); m_doctype->setPublicId(publicID); m_doctype->setSystemId(systemID); } if (!(resultFlags & PARSEMODE_HAVE_DOCTYPE)) { // No doctype found at all. Default to quirks mode and Html4. pMode = Compat; hMode = Html4; } else if ((resultFlags & PARSEMODE_HAVE_INTERNAL) || !(resultFlags & PARSEMODE_HAVE_PUBLIC_ID)) { // Internal subsets always denote full standards, as does // a doctype without a public ID. pMode = Strict; hMode = Html4; } else { // We have to check a list of public IDs to see what we // should do. QString lowerPubID = publicID.lower(); const char* pubIDStr = lowerPubID.latin1(); // Look up the entry in our gperf-generated table. const PubIDInfo* doctypeEntry = findDoctypeEntry(pubIDStr, publicID.length()); if (!doctypeEntry) { // The DOCTYPE is not in the list. Assume strict mode. pMode = Strict; hMode = Html4; return; } switch ((resultFlags & PARSEMODE_HAVE_SYSTEM_ID) ? doctypeEntry->mode_if_sysid : doctypeEntry->mode_if_no_sysid) { case PubIDInfo::eQuirks3: pMode = Compat; hMode = Html3; break; case PubIDInfo::eQuirks: pMode = Compat; hMode = Html4; break; case PubIDInfo::eAlmostStandards: pMode = Transitional; hMode = Html4; break; default: assert(false); } } } else { // Malformed doctype implies quirks mode. pMode = Compat; hMode = Html3; } // This needs to be done last, see tests/parser/compatmode_xhtml_mixed.html if ( hMode == Html4 && !m_htmlRequested ) { // this part is still debatable and possibly UA dependent hMode = XHtml; pMode = Transitional; } m_styleSelector->strictParsing = !inCompatMode(); // kdDebug() << "DocumentImpl::determineParseMode: publicId =" << publicID << " systemId = " << systemID << endl; // kdDebug() << "DocumentImpl::determineParseMode: htmlMode = " << hMode<< endl; if( pMode == Strict ) kdDebug(6030) << " using strict parseMode" << endl; else if (pMode == Compat ) kdDebug(6030) << " using compatibility parseMode" << endl; else kdDebug(6030) << " using transitional parseMode" << endl; // not sure this is needed if ( pMode != oldPMode && styleSelector() ) recalcStyleSelector();}#include "html_documentimpl.moc"⌨️ 快捷键说明
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