The Tor Browser: dom/xslt/xml/txXMLUtils.cpp@b8a032363ba2 (annotated)

dom/xslt/xml/txXMLUtils.cpp@b8a032363ba2 (annotated)

dom/xslt/xml/txXMLUtils.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
  * XML utility classes
  */
 #include "txXMLUtils.h"
 #include "nsString.h"
 #include "nsReadableUtils.h"
 #include "nsGkAtoms.h"
 #include "txStringUtils.h"
 #include "txNamespaceMap.h"
 #include "txXPathTreeWalker.h"
 #include "nsContentUtils.h"
 nsresult
 txExpandedName::init(const nsAString& aQName, txNamespaceMap* aResolver,
                      bool aUseDefault)
 {
     const nsAFlatString& qName = PromiseFlatString(aQName);
     const char16_t* colon;
     bool valid = XMLUtils::isValidQName(qName, &colon);
     if (!valid) {
         return NS_ERROR_FAILURE;
     }
     if (colon) {
         nsCOMPtr<nsIAtom> prefix = do_GetAtom(Substring(qName.get(), colon));
         int32_t namespaceID = aResolver->lookupNamespace(prefix);
         if (namespaceID == kNameSpaceID_Unknown)
             return NS_ERROR_FAILURE;
         mNamespaceID = namespaceID;
         const char16_t *end;
         qName.EndReading(end);
         mLocalName = do_GetAtom(Substring(colon + 1, end));
     }
     else {
         mNamespaceID = aUseDefault ? aResolver->lookupNamespace(nullptr) :
                                      kNameSpaceID_None;
         mLocalName = do_GetAtom(aQName);
     }
     return NS_OK;
 }
   //------------------------------/
  //- Implementation of XMLUtils -/
 //------------------------------/
 // static
 nsresult
 XMLUtils::splitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
                          nsIAtom **aLocalName, int32_t* aNameSpaceID)
 {
     /**
      *  Expat can send the following:
      *    localName
      *    namespaceURI<separator>localName
      *    namespaceURI<separator>localName<separator>prefix
      */
     const char16_t *uriEnd = nullptr;
     const char16_t *nameEnd = nullptr;
     const char16_t *pos;
     for (pos = aExpatName; *pos; ++pos) {
         if (*pos == kExpatSeparatorChar) {
             if (uriEnd) {
                 nameEnd = pos;
             }
             else {
                 uriEnd = pos;
             }
         }
     }
     const char16_t *nameStart;
     if (uriEnd) {
         *aNameSpaceID =
             txNamespaceManager::getNamespaceID(nsDependentSubstring(aExpatName,
                                                                     uriEnd));
         if (*aNameSpaceID == kNameSpaceID_Unknown) {
             return NS_ERROR_FAILURE;
         }
         nameStart = (uriEnd + 1);
         if (nameEnd)  {
             const char16_t *prefixStart = nameEnd + 1;
             *aPrefix = NS_NewAtom(Substring(prefixStart, pos)).take();
             if (!*aPrefix) {
                 return NS_ERROR_OUT_OF_MEMORY;
             }
         }
         else {
             nameEnd = pos;
             *aPrefix = nullptr;
         }
     }
     else {
         *aNameSpaceID = kNameSpaceID_None;
         nameStart = aExpatName;
         nameEnd = pos;
         *aPrefix = nullptr;
     }
     *aLocalName = NS_NewAtom(Substring(nameStart, nameEnd)).take();
     return *aLocalName ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 nsresult
 XMLUtils::splitQName(const nsAString& aName, nsIAtom** aPrefix,
                      nsIAtom** aLocalName)
 {
     const nsAFlatString& qName = PromiseFlatString(aName);
     const char16_t* colon;
     bool valid = XMLUtils::isValidQName(qName, &colon);
     if (!valid) {
         return NS_ERROR_FAILURE;
     }
     if (colon) {
         const char16_t *end;
         qName.EndReading(end);
         *aPrefix = NS_NewAtom(Substring(qName.get(), colon)).take();
         *aLocalName = NS_NewAtom(Substring(colon + 1, end)).take();
     }
     else {
         *aPrefix = nullptr;
         *aLocalName = NS_NewAtom(aName).take();
     }
     return NS_OK;
 }
 /**
  * Returns true if the given string has only whitespace characters
  */
 bool XMLUtils::isWhitespace(const nsAFlatString& aText)
 {
     nsAFlatString::const_char_iterator start, end;
     aText.BeginReading(start);
     aText.EndReading(end);
     for ( ; start != end; ++start) {
         if (!isWhitespace(*start)) {
             return false;
         }
     }
     return true;
 }
 /**
  * Normalizes the value of a XML processing instruction
 **/
 void XMLUtils::normalizePIValue(nsAString& piValue)
 {
     nsAutoString origValue(piValue);
     uint32_t origLength = origValue.Length();
     uint32_t conversionLoop = 0;
     char16_t prevCh = 0;
     piValue.Truncate();
     while (conversionLoop < origLength) {
         char16_t ch = origValue.CharAt(conversionLoop);
         switch (ch) {
             case '>':
             {
                 if (prevCh == '?') {
                     piValue.Append(char16_t(' '));
                 }
                 break;
             }
             default:
             {
                 break;
             }
         }
         piValue.Append(ch);
         prevCh = ch;
         ++conversionLoop;
     }
 }
 //static
 bool XMLUtils::isValidQName(const nsAFlatString& aQName,
                             const char16_t** aColon)
 {
   return NS_SUCCEEDED(nsContentUtils::CheckQName(aQName, true, aColon));
 }
 //static
 bool XMLUtils::getXMLSpacePreserve(const txXPathNode& aNode)
 {
     nsAutoString value;
     txXPathTreeWalker walker(aNode);
     do {
         if (walker.getAttr(nsGkAtoms::space, kNameSpaceID_XML, value)) {
             if (TX_StringEqualsAtom(value, nsGkAtoms::preserve)) {
                 return true;
             }
             if (TX_StringEqualsAtom(value, nsGkAtoms::_default)) {
                 return false;
             }
         }
     } while (walker.moveToParent());
     return false;
 }

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dom/xslt/xml/txXMLUtils.cpp@b8a032363ba2 (annotated)

dom/xslt/xml/txXMLUtils.cpp