// g++ -Wall -O2 contrib/html5-printer.cpp -o html5-printer -ltinyxml2
// This program demonstrates how to use "tinyxml2" to generate conformant HTML5
// by deriving from the "tinyxml2::XMLPrinter" class.
// http://dev.w3.org/html5/markup/syntax.html
// In HTML5, there are 16 so-called "void" elements. "void elements" NEVER have
// inner content (but they MAY have attributes), and are assumed to be self-closing.
// An example of a self-closig HTML5 element is "
" (line break)
// All other elements are called "non-void" and MUST never self-close.
// Examples: "".
// tinyxml2::XMLPrinter will emit _ALL_ XML elements with no inner content as
// self-closing. This behavior produces space-effeceint XML, but incorrect HTML5.
// Author: Dennis Jenkins, dennis (dot) jenkins (dot) 75 (at) gmail (dot) com.
// License: Same as tinyxml2 (zlib)
// This example is a small contribution to the world! Enjoy it!
#include
#include
#if defined (_MSC_VER)
#define strcasecmp stricmp
#endif
using namespace tinyxml2;
// Contrived input containing a mix of void and non-void HTML5 elements.
// When printed via XMLPrinter, some non-void elements will self-close (not valid HTML5).
static const char input[] =
"
©";
// XMLPrinterHTML5 is small enough, just put the entire implementation inline.
class XMLPrinterHTML5 : public XMLPrinter
{
public:
XMLPrinterHTML5 (FILE* file=0, bool compact = false, int depth = 0) :
XMLPrinter (file, compact, depth)
{}
protected:
virtual void CloseElement () {
if (_elementJustOpened && !isVoidElement (_stack.PeekTop())) {
SealElement();
}
XMLPrinter::CloseElement();
}
virtual bool isVoidElement (const char *name) {
// Complete list of all HTML5 "void elements",
// http://dev.w3.org/html5/markup/syntax.html
static const char *list[] = {
"area", "base", "br", "col", "command", "embed", "hr", "img",
"input", "keygen", "link", "meta", "param", "source", "track", "wbr",
NULL
};
// I could use 'bsearch', but I don't have MSVC to test on (it would work with gcc/libc).
for (const char **p = list; *p; ++p) {
if (!strcasecmp (name, *p)) {
return true;
}
}
return false;
}
};
int main (void) {
XMLDocument doc (false);
doc.Parse (input);
std::cout << "INPUT:\n" << input << "\n\n";
XMLPrinter prn (NULL, true);
doc.Print (&prn);
std::cout << "XMLPrinter (not valid HTML5):\n" << prn.CStr() << "\n\n";
XMLPrinterHTML5 html5 (NULL, true);
doc.Print (&html5);
std::cout << "XMLPrinterHTML5:\n" << html5.CStr() << "\n";
return 0;
}