The Tor Browser: dom/xslt/xml/txXMLUtils.h@b8a032363ba2

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

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /**

     7  * An XML Utility class

     8 **/

    10 #ifndef MITRE_XMLUTILS_H

    11 #define MITRE_XMLUTILS_H

    13 #include "txCore.h"

    14 #include "nsCOMPtr.h"

    15 #include "nsDependentSubstring.h"

    16 #include "nsIAtom.h"

    17 #include "txXPathNode.h"

    19 #define kExpatSeparatorChar 0xFFFF

    21 extern "C" int MOZ_XMLIsLetter(const char* ptr);

    22 extern "C" int MOZ_XMLIsNCNameChar(const char* ptr);

    24 class nsIAtom;

    25 class txNamespaceMap;

    27 class txExpandedName {

    28 public:

    29     txExpandedName() : mNamespaceID(kNameSpaceID_None)

    30     {

    31     }

    33     txExpandedName(int32_t aNsID,

    34                    nsIAtom* aLocalName) : mNamespaceID(aNsID),

    35                                           mLocalName(aLocalName)

    36     {

    37     }

    39     txExpandedName(const txExpandedName& aOther) :

    40         mNamespaceID(aOther.mNamespaceID),

    41         mLocalName(aOther.mLocalName)

    42     {

    43     }

    45     nsresult init(const nsAString& aQName, txNamespaceMap* aResolver,

    46                   bool aUseDefault);

    48     void reset()

    49     {

    50         mNamespaceID = kNameSpaceID_None;

    51         mLocalName = nullptr;

    52     }

    54     bool isNull()

    55     {

    56         return mNamespaceID == kNameSpaceID_None && !mLocalName;

    57     }

    59     txExpandedName& operator = (const txExpandedName& rhs)

    60     {

    61         mNamespaceID = rhs.mNamespaceID;

    62         mLocalName = rhs.mLocalName;

    63         return *this;

    64     }

    66     bool operator == (const txExpandedName& rhs) const

    67     {

    68         return ((mLocalName == rhs.mLocalName) &&

    69                 (mNamespaceID == rhs.mNamespaceID));

    70     }

    72     bool operator != (const txExpandedName& rhs) const

    73     {

    74         return ((mLocalName != rhs.mLocalName) ||

    75                 (mNamespaceID != rhs.mNamespaceID));

    76     }

    78     int32_t mNamespaceID;

    79     nsCOMPtr<nsIAtom> mLocalName;

    80 };

    82 class XMLUtils {

    84 public:

    85     static nsresult splitExpatName(const char16_t *aExpatName,

    86                                    nsIAtom **aPrefix, nsIAtom **aLocalName,

    87                                    int32_t* aNameSpaceID);

    88     static nsresult splitQName(const nsAString& aName, nsIAtom** aPrefix,

    89                                nsIAtom** aLocalName);

    91     /*

    92      * Returns true if the given character is whitespace.

    93      */

    94     static bool isWhitespace(const char16_t& aChar)

    95     {

    96         return (aChar <= ' ' &&

    97                 (aChar == ' ' || aChar == '\r' ||

    98                  aChar == '\n'|| aChar == '\t'));

    99     }

   101     /**

   102      * Returns true if the given string has only whitespace characters

   103      */

   104     static bool isWhitespace(const nsAFlatString& aText);

   106     /**

   107      * Normalizes the value of a XML processingInstruction

   108     **/

   109     static void normalizePIValue(nsAString& attValue);

   111     /**

   112      * Returns true if the given string is a valid XML QName

   113      */

   114     static bool isValidQName(const nsAFlatString& aQName,

   115                              const char16_t** aColon);

   117     /**

   118      * Returns true if the given character represents an Alpha letter

   119      */

   120     static bool isLetter(char16_t aChar)

   121     {

   122         return !!MOZ_XMLIsLetter(reinterpret_cast<const char*>(&aChar));

   123     }

   125     /**

   126      * Returns true if the given character is an allowable NCName character

   127      */

   128     static bool isNCNameChar(char16_t aChar)

   129     {

   130         return !!MOZ_XMLIsNCNameChar(reinterpret_cast<const char*>(&aChar));

   131     }

   133     /*

   134      * Walks up the document tree and returns true if the closest xml:space

   135      * attribute is "preserve"

   136      */

   137     static bool getXMLSpacePreserve(const txXPathNode& aNode);

   138 };

   140 #endif

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