pjs/extensions/transformiix/source/xml/XMLUtils.cpp

255 строки
7.5 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* The MITRE Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Keith Visco <kvisco@ziplink.net> (Original Author)
* Lidong <lidong520@263.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* XML utility classes
*/
#include "XMLUtils.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "txAtoms.h"
#include "txStringUtils.h"
#include "txNamespaceMap.h"
#include "txXPathTreeWalker.h"
nsresult
txExpandedName::init(const nsAString& aQName, txNamespaceMap* aResolver,
MBool aUseDefault)
{
const nsAFlatString& qName = PromiseFlatString(aQName);
const PRUnichar* colon;
PRBool valid = XMLUtils::isValidQName(qName, &colon);
if (!valid) {
return NS_ERROR_FAILURE;
}
if (colon) {
nsCOMPtr<nsIAtom> prefix = do_GetAtom(Substring(qName.get(), colon));
PRInt32 namespaceID = aResolver->lookupNamespace(prefix);
if (namespaceID == kNameSpaceID_Unknown)
return NS_ERROR_FAILURE;
mNamespaceID = namespaceID;
const PRUnichar *end;
qName.EndReading(end);
mLocalName = do_GetAtom(Substring(colon + 1, end));
}
else {
mNamespaceID = aUseDefault ? aResolver->lookupNamespace(nsnull) :
kNameSpaceID_None;
mLocalName = do_GetAtom(aQName);
}
return NS_OK;
}
//------------------------------/
//- Implementation of XMLUtils -/
//------------------------------/
// static
nsresult
XMLUtils::splitExpatName(const PRUnichar *aExpatName, nsIAtom **aPrefix,
nsIAtom **aLocalName, PRInt32* aNameSpaceID)
{
/**
* Expat can send the following:
* localName
* namespaceURI<separator>localName
* namespaceURI<separator>localName<separator>prefix
*
* and we use 0xFFFF for the <separator>.
*
*/
const PRUnichar *uriEnd = nsnull;
const PRUnichar *nameEnd = nsnull;
const PRUnichar *pos;
for (pos = aExpatName; *pos; ++pos) {
if (*pos == 0xFFFF) {
if (uriEnd) {
nameEnd = pos;
}
else {
uriEnd = pos;
}
}
}
const PRUnichar *nameStart;
if (uriEnd) {
*aNameSpaceID =
txNamespaceManager::getNamespaceID(nsDependentSubstring(aExpatName,
uriEnd));
if (*aNameSpaceID == kNameSpaceID_Unknown) {
return NS_ERROR_FAILURE;
}
nameStart = (uriEnd + 1);
if (nameEnd) {
const PRUnichar *prefixStart = nameEnd + 1;
*aPrefix = NS_NewAtom(NS_ConvertUTF16toUTF8(prefixStart,
pos - prefixStart));
if (!*aPrefix) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
else {
nameEnd = pos;
*aPrefix = nsnull;
}
}
else {
*aNameSpaceID = kNameSpaceID_None;
nameStart = aExpatName;
nameEnd = pos;
*aPrefix = nsnull;
}
*aLocalName = NS_NewAtom(NS_ConvertUTF16toUTF8(nameStart,
nameEnd - nameStart));
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 PRUnichar* colon;
PRBool valid = XMLUtils::isValidQName(qName, &colon);
if (!valid) {
return NS_ERROR_FAILURE;
}
if (colon) {
const PRUnichar *end;
qName.EndReading(end);
*aPrefix = NS_NewAtom(Substring(qName.get(), colon));
*aLocalName = NS_NewAtom(Substring(colon + 1, end));
}
else {
*aPrefix = nsnull;
*aLocalName = NS_NewAtom(aName);
}
return NS_OK;
}
const nsDependentSubstring XMLUtils::getLocalPart(const nsAString& src)
{
// Anything after ':' is the local part of the name
PRInt32 idx = src.FindChar(':');
if (idx == kNotFound) {
return Substring(src, 0, src.Length());
}
NS_ASSERTION(idx > 0, "This QName looks invalid.");
return Substring(src, idx + 1, src.Length() - (idx + 1));
}
/**
* Returns true if the given string has only whitespace characters
*/
PRBool 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 PR_FALSE;
}
}
return PR_TRUE;
}
/**
* Normalizes the value of a XML processing instruction
**/
void XMLUtils::normalizePIValue(nsAString& piValue)
{
nsAutoString origValue(piValue);
PRUint32 origLength = origValue.Length();
PRUint32 conversionLoop = 0;
PRUnichar prevCh = 0;
piValue.Truncate();
while (conversionLoop < origLength) {
PRUnichar ch = origValue.CharAt(conversionLoop);
switch (ch) {
case '>':
{
if (prevCh == '?') {
piValue.Append(PRUnichar(' '));
}
break;
}
default:
{
break;
}
}
piValue.Append(ch);
prevCh = ch;
++conversionLoop;
}
}
//static
MBool XMLUtils::getXMLSpacePreserve(const txXPathNode& aNode)
{
nsAutoString value;
txXPathTreeWalker walker(aNode);
do {
if (walker.getAttr(txXMLAtoms::space, kNameSpaceID_XML, value)) {
if (TX_StringEqualsAtom(value, txXMLAtoms::preserve)) {
return PR_TRUE;
}
if (TX_StringEqualsAtom(value, txXMLAtoms::_default)) {
return PR_FALSE;
}
}
} while (walker.moveToParent());
return PR_FALSE;
}