Class: Nokogiri::HTML::SAX::ParserContext

Inherits:
XML::SAX::ParserContext show all
Defined in:
lib/nokogiri/html/sax/parser_context.rb,
ext/nokogiri/html_sax_parser_context.c

Overview

Context for HTML SAX parsers. This class is usually not instantiated by the user. Instead, you should be looking at Nokogiri::HTML::SAX::Parser

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.file(filename, encoding) ⇒ Object



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# File 'ext/nokogiri/html_sax_parser_context.c', line 47

static VALUE parse_file(VALUE klass, VALUE filename, VALUE encoding)
{
  htmlParserCtxtPtr ctxt = htmlCreateFileParserCtxt(
      StringValueCStr(filename),
      StringValueCStr(encoding)
  );
  return Data_Wrap_Struct(klass, NULL, deallocate, ctxt);
}

.memory(data, encoding) ⇒ Object



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# File 'ext/nokogiri/html_sax_parser_context.c', line 16

static VALUE
parse_memory(VALUE klass, VALUE data, VALUE encoding)
{
    htmlParserCtxtPtr ctxt;

    if (NIL_P(data))
	rb_raise(rb_eArgError, "data cannot be nil");
    if (!(int)RSTRING_LEN(data))
	rb_raise(rb_eRuntimeError, "data cannot be empty");

    ctxt = htmlCreateMemoryParserCtxt(StringValuePtr(data),
				      (int)RSTRING_LEN(data));
    if (ctxt->sax) {
	xmlFree(ctxt->sax);
	ctxt->sax = NULL;
    }

    if (RTEST(encoding)) {
	xmlCharEncodingHandlerPtr enc = xmlFindCharEncodingHandler(StringValueCStr(encoding));
	if (enc != NULL) {
	    xmlSwitchToEncoding(ctxt, enc);
	    if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
		rb_raise(rb_eRuntimeError, "Unsupported encoding %s",
			 StringValueCStr(encoding));
	    }
	}
    }

    return Data_Wrap_Struct(klass, NULL, deallocate, ctxt);
}

.new(thing, encoding = 'UTF-8') ⇒ Object



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# File 'lib/nokogiri/html/sax/parser_context.rb', line 10

def self.new thing, encoding = 'UTF-8'
  [:read, :close].all? { |x| thing.respond_to?(x) } ?  super :
    memory(thing, encoding)
end

Instance Method Details

#parse_with(sax_handler) ⇒ Object



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# File 'ext/nokogiri/html_sax_parser_context.c', line 76

static VALUE
parse_with(VALUE self, VALUE sax_handler)
{
    htmlParserCtxtPtr ctxt;
    htmlSAXHandlerPtr sax;

    if (!rb_obj_is_kind_of(sax_handler, cNokogiriXmlSaxParser))
	rb_raise(rb_eArgError, "argument must be a Nokogiri::XML::SAX::Parser");

    Data_Get_Struct(self, htmlParserCtxt, ctxt);
    Data_Get_Struct(sax_handler, htmlSAXHandler, sax);

    /* Free the sax handler since we'll assign our own */
    if (ctxt->sax && ctxt->sax != (xmlSAXHandlerPtr)&xmlDefaultSAXHandler)
	xmlFree(ctxt->sax);

    ctxt->sax = sax;
    ctxt->userData = (void *)NOKOGIRI_SAX_TUPLE_NEW(ctxt, sax_handler);

    rb_ensure(parse_doc, (VALUE)ctxt, parse_doc_finalize, (VALUE)ctxt);

    return self;
}