Class: LibXML::XML::Writer

Inherits:
Object
  • Object
show all
Defined in:
ext/libxml/ruby_xml_writer.c,
ext/libxml/ruby_xml_writer.c

Overview

The XML::Writer class provides a simpler, alternative way to build a valid XML document from scratch (forward-only) compared to a DOM approach (based on XML::Document class).

For a more in depth tutorial, albeit in C, see xmlsoft.org/xmlwriter.html

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.XML::Writer::document ⇒ XML::Writer

Creates a XML::Writer which will write into an in memory XML::Document

Returns:



212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
 
# File 'ext/libxml/ruby_xml_writer.c', line 212

static VALUE rxml_writer_doc(VALUE klass)
{
    xmlDocPtr doc;
    rxml_writer_object *rwo;

    rwo = ALLOC(rxml_writer_object);
    rwo->buffer = NULL;
    rwo->output = Qnil;
    rwo->closed = 0;
#ifdef HAVE_RUBY_ENCODING_H
    rwo->encoding = NULL;
#endif /* HAVE_RUBY_ENCODING_H */
    rwo->output_type = RXMLW_OUTPUT_DOC;
    if (NULL == (rwo->writer = xmlNewTextWriterDoc(&doc, 0))) {
        rxml_raise(&xmlLastError);
    }
    rwo->output = rxml_document_wrap(doc);

    return rxml_writer_wrap(rwo);
}

.XML::Writer::file(path) ⇒ XML::Writer

Creates a XML::Writer object which will write XML into the file with the given name.

Returns:



161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
 
# File 'ext/libxml/ruby_xml_writer.c', line 161

static VALUE rxml_writer_file(VALUE klass, VALUE filename)
{
    rxml_writer_object *rwo;

    rwo = ALLOC(rxml_writer_object);
    rwo->output = Qnil;
    rwo->buffer = NULL;
    rwo->closed = 0;
#ifdef HAVE_RUBY_ENCODING_H
    rwo->encoding = NULL;
#endif /* HAVE_RUBY_ENCODING_H */
    rwo->output_type = RXMLW_OUTPUT_NONE;
    if (NULL == (rwo->writer = xmlNewTextWriterFilename(StringValueCStr(filename), 0))) {
        rxml_raise(&xmlLastError);
    }

    return rxml_writer_wrap(rwo);
}

.XML::Writer::io(io) ⇒ XML::Writer

Creates a XML::Writer which will write XML directly into an IO object.

Returns:



121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
 
# File 'ext/libxml/ruby_xml_writer.c', line 121

static VALUE rxml_writer_io(VALUE klass, VALUE io)
{
#if 0
typedef int (*xmlOutputCloseCallback)(void * context);
typedef int (*xmlOutputWriteCallback)(void * context, const char * buffer, int len);

ssize_t rb_io_bufwrite(VALUE io, const void *buf, size_t size);

xmlOutputBufferPtr xmlOutputBufferCreateIO(xmlOutputWriteCallback iowrite, xmlOutputCloseCallback ioclose, void * ioctx, xmlCharEncodingHandlerPtr encoder)

xmlCharEncodingHandlerPtr xmlFindCharEncodingHandler(const char * name);
#endif
    xmlOutputBufferPtr out;
    rxml_writer_object *rwo;

    rwo = ALLOC(rxml_writer_object);
    rwo->output = io;
    rwo->buffer = NULL;
    rwo->closed = 0;
#ifdef HAVE_RUBY_ENCODING_H
    rwo->encoding = NULL;
#endif /* HAVE_RUBY_ENCODING_H */
    rwo->output_type = RXMLW_OUTPUT_IO;
    if (NULL == (out = xmlOutputBufferCreateIO(rxml_writer_write_callback, NULL, (void *) rwo, NULL))) {
        rxml_raise(&xmlLastError);
    }
    if (NULL == (rwo->writer = xmlNewTextWriter(out))) {
        rxml_raise(&xmlLastError);
    }

    return rxml_writer_wrap(rwo);
}

.XML::Writer::string ⇒ XML::Writer

Creates a XML::Writer which will write XML into memory, as string.

Returns:



185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'ext/libxml/ruby_xml_writer.c', line 185

static VALUE rxml_writer_string(VALUE klass)
{
    rxml_writer_object *rwo;

    rwo = ALLOC(rxml_writer_object);
    rwo->output = Qnil;
    rwo->closed = 0;
#ifdef HAVE_RUBY_ENCODING_H
    rwo->encoding = NULL;
#endif /* HAVE_RUBY_ENCODING_H */
    rwo->output_type = RXMLW_OUTPUT_STRING;
    if (NULL == (rwo->buffer = xmlBufferCreate())) {
        rxml_raise(&xmlLastError);
    }
    if (NULL == (rwo->writer = xmlNewTextWriterMemory(rwo->buffer, 0))) {
        xmlBufferFree(rwo->buffer);
        rxml_raise(&xmlLastError);
    }

    return rxml_writer_wrap(rwo);
}

Instance Method Details

#end_attribute ⇒ Object

Ends an attribute, namespaced or not. Returns false on failure.



651
652
653
654
 
# File 'ext/libxml/ruby_xml_writer.c', line 651

static VALUE rxml_writer_end_attribute(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndAttribute);
}

#end_cdata ⇒ Object

Ends current CDATA section. Returns false on failure.



746
747
748
749
 
# File 'ext/libxml/ruby_xml_writer.c', line 746

static VALUE rxml_writer_end_cdata(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndCDATA);
}

#end_comment ⇒ Object

Ends current comment, returns false on failure. Note: libxml2 >= 2.6.7 required



674
675
676
677
 
# File 'ext/libxml/ruby_xml_writer.c', line 674

static VALUE rxml_writer_end_comment(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndComment);
}

#end_document ⇒ Object

Ends current document. Returns false on failure.



803
804
805
806
 
# File 'ext/libxml/ruby_xml_writer.c', line 803

static VALUE rxml_writer_end_document(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndDocument);
}

#end_dtd ⇒ Object

Ends current DTD, returns false on failure.



884
885
886
887
 
# File 'ext/libxml/ruby_xml_writer.c', line 884

static VALUE rxml_writer_end_dtd(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndDTD);
}

#end_dtd_attlist ⇒ Object

Ends current DTD attribute list, returns false on failure.



904
905
906
907
 
# File 'ext/libxml/ruby_xml_writer.c', line 904

static VALUE rxml_writer_end_dtd_attlist(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndDTDAttlist);
}

#end_dtd_element ⇒ Object

Ends current DTD element, returns false on failure.



914
915
916
917
 
# File 'ext/libxml/ruby_xml_writer.c', line 914

static VALUE rxml_writer_end_dtd_element(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndDTDElement);
}

#end_dtd_entity ⇒ Object

Ends current DTD entity, returns false on failure.



894
895
896
897
 
# File 'ext/libxml/ruby_xml_writer.c', line 894

static VALUE rxml_writer_end_dtd_entity(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndDTDEntity);
}

#end_element ⇒ Object

Ends current element, namespaced or not. Returns false on failure.



714
715
716
717
 
# File 'ext/libxml/ruby_xml_writer.c', line 714

static VALUE rxml_writer_end_element(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndElement);
}

#end_pi ⇒ Object

Ends current processing instruction. Returns false on failure.



823
824
825
826
 
# File 'ext/libxml/ruby_xml_writer.c', line 823

static VALUE rxml_writer_end_pi(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterEndPI);
}

#flush(empty? = true) ⇒ Object

Flushes the output buffer. Returns the number of written bytes or the current content of the internal buffer for a in memory XML::Writer. If empty? is true, and for a in memory XML::Writer, this internel buffer is empty.



243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
 
# File 'ext/libxml/ruby_xml_writer.c', line 243

static VALUE rxml_writer_flush(int argc, VALUE *argv, VALUE self)
{
    int ret;
    VALUE empty;
    rxml_writer_object *rwo;

    rb_scan_args(argc, argv, "01", &empty);

    rwo = rxml_textwriter_get(self);
    if (-1 == (ret = xmlTextWriterFlush(rwo->writer))) {
        rxml_raise(&xmlLastError);
    }

    if (NULL != rwo->buffer) {
        VALUE content;

#ifdef HAVE_RUBY_ENCODING_H
        content = rb_external_str_new_with_enc(rwo->buffer->content, rwo->buffer->use, rwo->encoding);
#else
        content = rb_str_new(rwo->buffer->content, rwo->buffer->use);
#endif /* HAVE_RUBY_ENCODING_H */
        if (NIL_P(empty) || RTEST(empty)) { /* nil = default value = true */
            xmlBufferEmpty(rwo->buffer);
        }

        return content;
    } else {
        return INT2NUM(ret);
    }
}

#write_full_end_element ⇒ Object

Ends current element, namespaced or not. Returns false on failure. This method writes an end tag even if the element is empty (<foo></foo>), end_element does not (<foo/>).



726
727
728
729
 
# File 'ext/libxml/ruby_xml_writer.c', line 726

static VALUE rxml_writer_full_end_element(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterFullEndElement);
}

#result ⇒ (XML::Document|"string"|nil)

Returns the associated result object to the XML::Writer creation. A String for a XML::Writer object created with XML::Writer::string, a XML::Document with XML::Writer::document, etc.

Returns:



281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
 
# File 'ext/libxml/ruby_xml_writer.c', line 281

static VALUE rxml_writer_result(VALUE self)
{
    VALUE ret;
    rxml_writer_object *rwo;

    ret = Qnil;
    rwo = rxml_textwriter_get(self);
    if (-1 == (ret = xmlTextWriterFlush(rwo->writer))) {
        rxml_raise(&xmlLastError);
    }
    switch (rwo->output_type) {
        case RXMLW_OUTPUT_DOC:
            ret = rwo->output;
            break;
        case RXMLW_OUTPUT_STRING:
            ret = rxml_writer_c_to_ruby_string(rwo->buffer->content, rwo->buffer->use);
            break;
        case RXMLW_OUTPUT_IO:
        case RXMLW_OUTPUT_NONE:
            break;
        default:
            rb_bug("unexpected output");
            break;
    }

    return ret;
}

#set_indent(indentation) ⇒ Object

Toggles indentation on or off. Returns false on failure.

Availability: libxml2 >= 2.6.5



434
435
436
437
438
439
440
441
442
443
 
# File 'ext/libxml/ruby_xml_writer.c', line 434

static VALUE rxml_writer_set_indent(VALUE self, VALUE indentation)
{
    int ret;
    rxml_writer_object *rwo;

    rwo = rxml_textwriter_get(self);
    ret = xmlTextWriterSetIndent(rwo->writer, RTEST(indentation));

    return (-1 == ret ? Qfalse : Qtrue);
}

#set_indent_string(string) ⇒ Object

Sets the string to use to indent each element of the document. Don’t forget to enable indentation with set_indent. Returns false on failure.

Availability: libxml2 >= 2.6.5



454
455
456
457
 
# File 'ext/libxml/ruby_xml_writer.c', line 454

static VALUE rxml_writer_set_indent_string(VALUE self, VALUE indentation)
{
    return numeric_rxml_writer_string(self, indentation, xmlTextWriterSetIndentString);
}

#set_quote_char(...) ⇒ Object

Sets the character used to quote attributes. Returns false on failure.

Notes:

  • only “ (default) and ‘ characters are valid

  • availability: libxml2 >= 2.9.0



1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
 
# File 'ext/libxml/ruby_xml_writer.c', line 1044

static VALUE rxml_writer_set_quote_char(VALUE self, VALUE quotechar)
{
    int ret;
    const char *xquotechar;
    rxml_writer_object *rwo;

    rwo = rxml_textwriter_get(self);
    xquotechar = StringValueCStr(quotechar);
    ret = xmlTextWriterSetQuoteChar(rwo->writer, (xmlChar) xquotechar[0]);

    return (-1 == ret ? Qfalse : Qtrue);
}

#start_attribute(name) ⇒ Object

Starts an attribute. Returns false on failure.



622
623
624
625
 
# File 'ext/libxml/ruby_xml_writer.c', line 622

static VALUE rxml_writer_start_attribute(VALUE self, VALUE name)
{
    return numeric_rxml_writer_string(self, name, xmlTextWriterStartAttribute);
}

#start_attribute_ns(prefix, name, namespaceURI) ⇒ Object

Starts a namespaced attribute. Returns false on failure.

Note: by default, the xmlns: definition is repeated on every element. If you want the prefix, but don’t want the xmlns: declaration repeated, set namespaceURI to nil or omit it. Don’t forget to declare the namespace prefix somewhere earlier.



637
638
639
640
641
642
643
644
 
# File 'ext/libxml/ruby_xml_writer.c', line 637

static VALUE rxml_writer_start_attribute_ns(int argc, VALUE *argv, VALUE self)
{
    VALUE prefix, name, namespaceURI;

    rb_scan_args(argc, argv, "21", &prefix, &name, &namespaceURI);

    return numeric_rxml_writer_va_strings(self, Qundef, 3, xmlTextWriterStartAttributeNS, prefix, name, namespaceURI);
}

#start_cdata ⇒ Object

Starts a new CDATA section. Returns false on failure.



736
737
738
739
 
# File 'ext/libxml/ruby_xml_writer.c', line 736

static VALUE rxml_writer_start_cdata(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterStartCDATA);
}

#start_comment ⇒ Object

Starts a comment. Returns false on failure. Note: libxml2 >= 2.6.7 required



663
664
665
666
 
# File 'ext/libxml/ruby_xml_writer.c', line 663

static VALUE rxml_writer_start_comment(VALUE self)
{
    return numeric_rxml_writer_void(self, xmlTextWriterStartComment);
}

#start_document ⇒ Object #start_document(: encoding) ⇒ XML::Encoding::UTF_8

Starts a new document. Returns false on failure.

You may provide an optional hash table to control XML header that will be generated. Valid options are:

  • encoding: the output document encoding, defaults to nil (= UTF-8). Valid

values are the encoding constants defined on XML::Encoding

  • standalone: nil (default) or a boolean to indicate if the document is

standalone or not

Overloads:



765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
 
# File 'ext/libxml/ruby_xml_writer.c', line 765

static VALUE rxml_writer_start_document(int argc, VALUE *argv, VALUE self)
{
    int ret;
    VALUE options;
    rxml_writer_object *rwo;
    const char *xencoding, *xstandalone;

    options = Qnil;
    xstandalone = xencoding = NULL;
    rb_scan_args(argc, argv, "01", &options);
    if (!NIL_P(options)) {
        VALUE encoding, standalone;

        encoding = standalone = Qnil;
        Check_Type(options, T_HASH);
        encoding = rb_hash_aref(options, sEncoding);
        xencoding = NIL_P(encoding) ? NULL : xmlGetCharEncodingName(NUM2INT(encoding));
        standalone = rb_hash_aref(options, sStandalone);
        if (NIL_P(standalone)) {
            xstandalone = NULL;
        } else {
            xstandalone = RTEST(standalone) ? "yes" : "no";
        }
    }
    rwo = rxml_textwriter_get(self);
#ifdef HAVE_RUBY_ENCODING_H
    rwo->encoding = rxml_figure_encoding(xencoding);
#endif /* !HAVE_RUBY_ENCODING_H */
    ret = xmlTextWriterStartDocument(rwo->writer, NULL, xencoding, xstandalone);

    return (-1 == ret ? Qfalse : Qtrue);
}

#start_dtd(qualifiedName, publicId, systemId) ⇒ Object

Starts a DTD. Returns false on failure.



833
834
835
836
837
838
839
840
 
# File 'ext/libxml/ruby_xml_writer.c', line 833

static VALUE rxml_writer_start_dtd(int argc, VALUE *argv, VALUE self)
{
    VALUE name, pubid, sysid;

    rb_scan_args(argc, argv, "12", &name, &pubid, &sysid);

    return numeric_rxml_writer_va_strings(self, Qundef, 3, xmlTextWriterStartDTD, name, pubid, sysid);
}

#start_dtd_attlist(name) ⇒ Object

Starts a DTD attribute list (<!ATTLIST … >). Returns false on failure.



874
875
876
877
 
# File 'ext/libxml/ruby_xml_writer.c', line 874

static VALUE rxml_writer_start_dtd_attlist(VALUE self, VALUE name)
{
    return numeric_rxml_writer_string(self, name, xmlTextWriterStartDTDAttlist);
}

#start_dtd_element(qualifiedName) ⇒ Object

Starts a DTD element (<!ELEMENT … >). Returns false on failure.



847
848
849
850
 
# File 'ext/libxml/ruby_xml_writer.c', line 847

static VALUE rxml_writer_start_dtd_element(VALUE self, VALUE name)
{
    return numeric_rxml_writer_string(self, name, xmlTextWriterStartDTDElement);
}

#start_dtd_entity(name, pe = false) ⇒ Object

Starts a DTD entity (<!ENTITY … >). Returns false on failure.



857
858
859
860
861
862
863
864
865
866
867
 
# File 'ext/libxml/ruby_xml_writer.c', line 857

static VALUE rxml_writer_start_dtd_entity(int argc, VALUE *argv, VALUE self)
{
    VALUE name, pe;

    rb_scan_args(argc, argv, "11", &name, &pe);
    if (NIL_P(pe)) {
        pe = Qfalse;
    }

    return numeric_rxml_writer_va_strings(self, pe, 1, xmlTextWriterStartDTDEntity, name);
}

#start_element(name) ⇒ Object

Starts a new element. Returns false on failure.



685
686
687
688
 
# File 'ext/libxml/ruby_xml_writer.c', line 685

static VALUE rxml_writer_start_element(VALUE self, VALUE name)
{
    return numeric_rxml_writer_string(self, name, xmlTextWriterStartElement);
}

#start_element_ns(prefix, name, namespaceURI) ⇒ Object

Starts a new namespaced element. Returns false on failure.

Note: by default, the xmlns: definition is repeated on every element. If you want the prefix, but don’t want the xmlns: declaration repeated, set namespaceURI to nil or omit it. Don’t forget to declare the namespace prefix somewhere earlier.



700
701
702
703
704
705
706
707
 
# File 'ext/libxml/ruby_xml_writer.c', line 700

static VALUE rxml_writer_start_element_ns(int argc, VALUE *argv, VALUE self)
{
    VALUE prefix, name, namespaceURI;

    rb_scan_args(argc, argv, "21", &prefix, &name, &namespaceURI);

    return numeric_rxml_writer_va_strings(self, Qundef, 3, xmlTextWriterStartElementNS, prefix, name, namespaceURI);
}

#start_pi(target) ⇒ Object

Starts a new processing instruction. Returns false on failure.



813
814
815
816
 
# File 'ext/libxml/ruby_xml_writer.c', line 813

static VALUE rxml_writer_start_pi(VALUE self, VALUE target)
{
    return numeric_rxml_writer_string(self, target, xmlTextWriterStartPI);
}

#write_attribute(name, content) ⇒ Object

Writes a full attribute, all at once. Returns false on failure. Same as start_attribute(name) + write_string(content) + end_attribute.



552
553
554
555
 
# File 'ext/libxml/ruby_xml_writer.c', line 552

static VALUE rxml_writer_write_attribute(VALUE self, VALUE name, VALUE content)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 2, xmlTextWriterWriteAttribute, name, content);
}

#write_attribute_ns(prefix, name, namespaceURI, content) ⇒ Object

Writes a full namespaced attribute, all at once. Returns false on failure. Same as start_attribute_ns(prefix, name, namespaceURI) + write_string(content) + end_attribute.

Notes:

  • by default, the xmlns: definition is repeated on every element. If you want

the prefix, but don’t want the xmlns: declaration repeated, set namespaceURI to nil or omit it. Don’t forget to declare the namespace prefix somewhere earlier.

  • content can be omitted too for an empty attribute



571
572
573
574
575
576
577
578
 
# File 'ext/libxml/ruby_xml_writer.c', line 571

static VALUE rxml_writer_write_attribute_ns(int argc, VALUE *argv, VALUE self)
{
    VALUE prefix, name, namespaceURI, content;

    rb_scan_args(argc, argv, "22", &prefix, &name, &namespaceURI, &content);

    return numeric_rxml_writer_va_strings(self, Qundef, 4, xmlTextWriterWriteAttributeNS, prefix, name, namespaceURI, content);
}

#write_cdata(content) ⇒ Object

Writes a full CDATA section, all at once. Returns false on failure. This is equivalent to start_cdata + write_string(content) + end_cdata.



481
482
483
484
 
# File 'ext/libxml/ruby_xml_writer.c', line 481

static VALUE rxml_writer_write_cdata(VALUE self, VALUE content)
{
    return numeric_rxml_writer_string(self, content, xmlTextWriterWriteCDATA);
}

#write_comment(content) ⇒ Object

Writes a full comment tag, all at once. Returns false on failure. This is equivalent to start_comment + write_string(content) + end_comment.



470
471
472
473
 
# File 'ext/libxml/ruby_xml_writer.c', line 470

static VALUE rxml_writer_write_comment(VALUE self, VALUE content)
{
    return numeric_rxml_writer_string(self, content, xmlTextWriterWriteComment);
}

#write_dtd(name[ [ [, publicId ], systemId ], subset ]) ⇒ Object

Writes a DTD, all at once. Returns false on failure.

  • name: dtd name

  • publicId: external subset public identifier, use nil for a SYSTEM doctype

  • systemId: external subset system identifier

  • subset: content

Examples:

writer.write_dtd 'html'
  #=> <!DOCTYPE html>
writer.write_dtd 'docbook', nil, 'http://www.docbook.org/xml/5.0/dtd/docbook.dtd'
  #=> <!DOCTYPE docbook SYSTEM "http://www.docbook.org/xml/5.0/dtd/docbook.dtd">
writer.write_dtd 'html', '-//W3C//DTD XHTML 1.1//EN', 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'
  #=> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
writer.write_dtd 'person', nil, nil, '<!ELEMENT person (firstname,lastname)><!ELEMENT firstname (#PCDATA)><!ELEMENT lastname (#PCDATA)>'
  #=> <!DOCTYPE person [<!ELEMENT person (firstname,lastname)><!ELEMENT firstname (#PCDATA)><!ELEMENT lastname (#PCDATA)>]>



938
939
940
941
942
943
944
945
 
# File 'ext/libxml/ruby_xml_writer.c', line 938

static VALUE rxml_writer_write_dtd(int argc, VALUE *argv, VALUE self)
{
    VALUE name, pubid, sysid, subset;

    rb_scan_args(argc, argv, "13", &name, &pubid, &sysid, &subset);

    return numeric_rxml_writer_va_strings(self, Qundef, 4, xmlTextWriterWriteDTD, name, pubid, sysid, subset);
}

#write_dtd_attlist(name, content) ⇒ Object

Writes a DTD attribute list, all at once. Returns false on failure.

writer.write_dtd_attlist 'id', 'ID #IMPLIED'
  #=> <!ATTLIST id ID #IMPLIED>



954
955
956
957
 
# File 'ext/libxml/ruby_xml_writer.c', line 954

static VALUE rxml_writer_write_dtd_attlist(VALUE self, VALUE name, VALUE content)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 2, xmlTextWriterWriteDTDAttlist, name, content);
}

#write_dtd_element(name, content) ⇒ Object

Writes a full DTD element, all at once. Returns false on failure.

writer.write_dtd_element 'person', '(firstname,lastname)'
  #=> <!ELEMENT person (firstname,lastname)>



966
967
968
969
 
# File 'ext/libxml/ruby_xml_writer.c', line 966

static VALUE rxml_writer_write_dtd_element(VALUE self, VALUE name, VALUE content)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 2, xmlTextWriterWriteDTDElement, name, content);
}

#write_dtd_entity(name, publicId, systemId, ndataid, content, pe) ⇒ Object

Writes a DTD entity, all at once. Returns false on failure.



976
977
978
979
 
# File 'ext/libxml/ruby_xml_writer.c', line 976

static VALUE rxml_writer_write_dtd_entity(VALUE self, VALUE name, VALUE pubid, VALUE sysid, VALUE ndataid, VALUE content, VALUE pe)
{
    return numeric_rxml_writer_va_strings(self, pe, 5, xmlTextWriterWriteDTDEntity, name, pubid, sysid, ndataid, content);
}

#write_dtd_external_entity(name, publicId, systemId, ndataid, pe) ⇒ Object

Writes a DTD external entity. The entity must have been started with start_dtd_entity. Returns false on failure.

  • name: the name of the DTD entity

  • publicId: the public identifier, which is an alternative to the system identifier

  • systemId: the system identifier, which is the URI of the DTD

  • ndataid: the xml notation name

  • pe: true if this is a parameter entity (to be used only in the DTD

itself), false if not



993
994
995
996
 
# File 'ext/libxml/ruby_xml_writer.c', line 993

static VALUE rxml_writer_write_dtd_external_entity(VALUE self, VALUE name, VALUE pubid, VALUE sysid, VALUE ndataid, VALUE pe)
{
    return numeric_rxml_writer_va_strings(self, pe, 4, xmlTextWriterWriteDTDExternalEntity, name, pubid, sysid, ndataid);
}

#write_dtd_external_entity_contents(publicId, systemId, ndataid) ⇒ Object

Writes the contents of a DTD external entity, all at once. Returns false on failure.



1003
1004
1005
1006
 
# File 'ext/libxml/ruby_xml_writer.c', line 1003

static VALUE rxml_writer_write_dtd_external_entity_contents(VALUE self, VALUE pubid, VALUE sysid, VALUE ndataid)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 3, xmlTextWriterWriteDTDExternalEntityContents, pubid, sysid, ndataid);
}

#write_dtd_internal_entity(name, content, pe) ⇒ Object

Writes a DTD internal entity, all at once. Returns false on failure.

Examples:

writer.write_dtd_entity 'Shape', '(rect|circle|poly|default)', true
  #=> <!ENTITY % Shape "(rect|circle|poly|default)">
writer.write_dtd_entity 'delta', '&#948;', false
  #=> <!ENTITY delta "&#948;">



1019
1020
1021
1022
 
# File 'ext/libxml/ruby_xml_writer.c', line 1019

static VALUE rxml_writer_write_dtd_internal_entity(VALUE self, VALUE name, VALUE content, VALUE pe)
{
    return numeric_rxml_writer_va_strings(self, pe, 2, xmlTextWriterWriteDTDInternalEntity, name, content);
}

#write_dtd_notation(name, publicId, systemId) ⇒ Object

Writes a DTD entity, all at once. Returns false on failure.



1029
1030
1031
1032
 
# File 'ext/libxml/ruby_xml_writer.c', line 1029

static VALUE rxml_writer_write_dtd_notation(VALUE self, VALUE name, VALUE pubid, VALUE sysid)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 3, xmlTextWriterWriteDTDNotation, name, pubid, sysid);
}

#write_element(name, content) ⇒ Object

Writes a full element tag, all at once. Returns false on failure. This is equivalent to start_element(name) + write_string(content) + end_element.



497
498
499
500
501
502
503
504
505
506
507
508
509
510
 
# File 'ext/libxml/ruby_xml_writer.c', line 497

static VALUE rxml_writer_write_element(int argc, VALUE *argv, VALUE self)
{
    VALUE name, content;

    rb_scan_args(argc, argv, "11", &name, &content);
    if (Qnil == content) {
        if (Qfalse == rxml_writer_start_element(self, name)) {
            return Qfalse;
        }
        return rxml_writer_end_element(self);
    } else {
        return numeric_rxml_writer_va_strings(self, Qundef, 2, xmlTextWriterWriteElement, name, content);
    }
}

#write_element_ns(prefix, name, namespaceURI, content) ⇒ Object

Writes a full namespaced element tag, all at once. Returns false on failure. This is a shortcut for start_element_ns(prefix, name, namespaceURI) + write_string(content) + end_element.

Notes:

  • by default, the xmlns: definition is repeated on every element. If you want

the prefix, but don’t want the xmlns: declaration repeated, set namespaceURI to nil or omit it. Don’t forget to declare the namespace prefix somewhere earlier.

  • content can be omitted for an empty tag



529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
 
# File 'ext/libxml/ruby_xml_writer.c', line 529

static VALUE rxml_writer_write_element_ns(int argc, VALUE *argv, VALUE self)
{
    VALUE prefix, name, namespaceURI, content;

    rb_scan_args(argc, argv, "22", &prefix, &name, &namespaceURI, &content);
    if (Qnil == content) {
        VALUE argv[3] = { prefix, name, namespaceURI };

        if (Qfalse == rxml_writer_start_element_ns(ARRAY_SIZE(argv), argv, self)) {
            return Qfalse;
        }
        return rxml_writer_end_element(self);
    } else {
        return numeric_rxml_writer_va_strings(self, Qundef, 4, xmlTextWriterWriteElementNS, prefix, name, namespaceURI, content);
    }
}

#write_pi(target, content) ⇒ Object

Writes a full CDATA tag, all at once. Returns false on failure. This is a shortcut for start_pi(target) + write_string(content) + end_pi.



586
587
588
589
 
# File 'ext/libxml/ruby_xml_writer.c', line 586

static VALUE rxml_writer_write_pi(VALUE self, VALUE target, VALUE content)
{
    return numeric_rxml_writer_va_strings(self, Qundef, 2, xmlTextWriterWritePI, target, content);
}

#write_raw(content) ⇒ Object

Writes the string content as is, reserved characters are not translated to their associated entities. Returns false on failure. Consider write_string to handle them.



612
613
614
615
 
# File 'ext/libxml/ruby_xml_writer.c', line 612

static VALUE rxml_writer_write_raw(VALUE self, VALUE content)
{
    return numeric_rxml_writer_string(self, content, xmlTextWriterWriteRaw);
}

#write_string(content) ⇒ Object

Safely (problematic characters are internally translated to their associated named entities) writes a string into the current node (attribute, element, comment, …). Returns false on failure.



600
601
602
603
 
# File 'ext/libxml/ruby_xml_writer.c', line 600

static VALUE rxml_writer_write_string(VALUE self, VALUE content)
{
    return numeric_rxml_writer_string(self, content, xmlTextWriterWriteString);
}