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Added method to register namespaces with XPath

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@25874 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Nicola Pero 2008-01-05 21:01:40 +00:00
parent 0727937d01
commit 5c6c74539f
3 changed files with 41 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2008-01-05 Nicola Pero <nicola.pero@meta-innovation.com>
* Source/Additions/GSXML.m ([GSXPathContext
-registerNamespaceWithPrefix:href:]): Added new method to support
namespaces in XPath expressions.
* Headers/Additions/GNUstepBase/GSXML.h: Same.
2008-01-05 Richard Frith-Macdonald <rfm@gnu.org>
* config/pathtls.m4: fixup form mingw32

20
Headers/Additions/GNUstepBase/GSXML.h
View file

@ -363,6 +363,20 @@ extern "C" {
* GSXPathString *result = [p evaluateExpression: @"string(/body/text())"];
* NSLog (@"Got %@", [result stringValue]);
*
* If the XML document contains namespaces, you first need to register them
* with the parser by using registerNamespaceWithPrefix:href:, as in:
*
* GSXPathContext *p = [[GSXPathContext alloc] initWithDocument: document];
* if ([p registerNamespaceWithPrefix: @"a" href="http://www.gnustep.org/demo"] == NO)
* {
* // Error registering namespace, do something about it.
* }
*
* and then you can use the namespace prefix in your expressions, as in
*
* GSXPathString *result = [p evaluateExpression: @"string(/a:body/text())"];
* NSLog (@"Got %@", [result stringValue]);
*
*/
@interface GSXPathContext : NSObject
{
@ -371,6 +385,12 @@ extern "C" {
}
- (id) initWithDocument: (GSXMLDocument*)d;
- (GSXPathObject*) evaluateExpression: (NSString*)XPathExpression;
/*
* Registers a new namespace. Return YES if succesful, NO if not.
*/
- (BOOL) registerNamespaceWithPrefix: (NSString *)prefix
href: (NSString *)href;
@end
/** XPath queries return a GSXPathObject. GSXPathObject in itself is

14
Source/Additions/GSXML.m
View file

@ -70,6 +70,7 @@
#include <libxml/HTMLparser.h>
#include <libxml/xmlmemory.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#ifdef HAVE_LIBXSLT
#include <libxslt/xslt.h>
@ -3753,6 +3754,19 @@ fatalErrorFunction(void *ctx, const unsigned char *msg, ...)
return result;
}
- (BOOL) registerNamespaceWithPrefix: (NSString *)prefix
href: (NSString *)href
{
if (xmlXPathRegisterNs (_lib, UTF8STRING(prefix), UTF8STRING(href)) != 0)
{
return NO;
}
else
{
return YES;
}
}
- (void) dealloc
{
xmlXPathFreeContext (_lib);