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 50

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 17

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 81

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);

  xmlSetStructuredErrorFunc(NULL, NULL);

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

  return self;
}