1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* Please see the LICENSE file for copyright and distribution information */
#include "ruby_libxml.h"
#include "ruby_xml_xpointer.h"
VALUE cXMLXPointer;
/*
* Document-class: LibXML::XML::XPointer
*
* The XML::Pointer class provides a standards based API for searching an xml document.
* XPointer is based on the XML Path Language (XML::XPath) and is documented
* at http://www.w3.org/TR/WD-xptr.
*/
static VALUE rxml_xpointer_point(VALUE class, VALUE rnode, VALUE xptr_str)
{
#ifdef LIBXML_XPTR_ENABLED
xmlNodePtr xnode;
xmlXPathContextPtr xctxt;
xmlXPathObjectPtr xpop;
VALUE context;
VALUE result;
VALUE argv[1];
Check_Type(xptr_str, T_STRING);
if (rb_obj_is_kind_of(rnode, cXMLNode) == Qfalse)
rb_raise(rb_eTypeError, "require an XML::Node object");
Data_Get_Struct(rnode, xmlNode, xnode);
argv[0] = rb_funcall(rnode, rb_intern("doc"), 0);
context = rb_class_new_instance(1, argv, cXMLXPathContext);
Data_Get_Struct(context, xmlXPathContext, xctxt);
xpop = xmlXPtrEval((xmlChar*)StringValuePtr(xptr_str), xctxt);
if (!xpop)
rxml_raise(&xmlLastError);
result = rxml_xpath_object_wrap(xnode->doc, xpop);
rb_iv_set(result, "@context", context);
return(result);
#else
rb_warn("libxml was compiled without XPointer support");
return (Qfalse);
#endif
}
VALUE rxml_xpointer_point2(VALUE node, VALUE xptr_str)
{
return (rxml_xpointer_point(cXMLXPointer, node, xptr_str));
}
/*
* call-seq:
* XML::XPointer.range(start_node, end_node) -> xpath
*
* Create an xpath representing the range between the supplied
* start and end node.
*/
static VALUE rxml_xpointer_range(VALUE class, VALUE rstart, VALUE rend)
{
#ifdef LIBXML_XPTR_ENABLED
xmlNodePtr start, end;
VALUE rxxp;
xmlXPathObjectPtr xpath;
if (rb_obj_is_kind_of(rstart, cXMLNode) == Qfalse)
rb_raise(rb_eTypeError, "require an XML::Node object as a starting point");
if (rb_obj_is_kind_of(rend, cXMLNode) == Qfalse)
rb_raise(rb_eTypeError, "require an XML::Node object as an ending point");
Data_Get_Struct(rstart, xmlNode, start);
if (start == NULL)
return(Qnil);
Data_Get_Struct(rend, xmlNode, end);
if (end == NULL)
return(Qnil);
xpath = xmlXPtrNewRangeNodes(start, end);
if (xpath == NULL)
rb_fatal("You shouldn't be able to have this happen");
rxxp = rxml_xpath_object_wrap(start->doc, xpath);
return(rxxp);
#else
rb_warn("libxml was compiled without XPointer support");
return (Qfalse);
#endif
}
void rxml_init_xpointer(void)
{
cXMLXPointer = rb_define_class_under(mXML, "XPointer", rb_cObject);
rb_define_singleton_method(cXMLXPointer, "range", rxml_xpointer_range, 2);
}
|
