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+// g++ -Wall -O2 contrib/html5-printer.cpp -o html5-printer -ltinyxml2
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+
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+// This program demonstrates how to use "tinyxml2" to generate conformant HTML5
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+// by deriving from the "tinyxml2::XMLPrinter" class.
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+
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+// http://dev.w3.org/html5/markup/syntax.html
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+
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+// In HTML5, there are 16 so-called "void" elements. "void elements" NEVER have
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+// inner content (but they MAY have attributes), and are assumed to be self-closing.
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+// An example of a self-closig HTML5 element is "<br/>" (line break)
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+// All other elements are called "non-void" and MUST never self-close.
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+// Examples: "<div class='lolcats'></div>".
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+
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+// tinyxml2::XMLPrinter will emit _ALL_ XML elements with no inner content as
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+// self-closing. This behavior produces space-effeceint XML, but incorrect HTML5.
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+
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+// Author: Dennis Jenkins, dennis (dot) jenkins (dot) 75 (at) gmail (dot) com.
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+// License: Same as tinyxml2 (zlib)
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+// This example is a small contribution to the world! Enjoy it!
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+
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+
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+#include <tinyxml2.h>
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+#include <iostream>
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+
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+#if defined (_MSC_VER)
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+#define strcasecmp stricmp
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+#endif
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+
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+using namespace tinyxml2;
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+
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+// Contrived input containing a mix of void and non-void HTML5 elements.
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+// When printed via XMLPrinter, some non-void elements will self-close (not valid HTML5).
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+static const char input[] =
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+"<html><body><p style='a'></p><br/>©<col a='1' b='2'/><div a='1'></div></body></html>";
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+
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+// XMLPrinterHTML5 is small enough, just put the entire implementation inline.
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+class XMLPrinterHTML5 : public XMLPrinter
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+{
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+public:
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+ XMLPrinterHTML5 (FILE* file=0, bool compact = false, int depth = 0) :
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+ XMLPrinter (file, compact, depth)
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+ {}
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+
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+protected:
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+ virtual void CloseElement () {
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+ if (_elementJustOpened && !isVoidElement (_stack.PeekTop())) {
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+ SealElement();
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+ }
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+ XMLPrinter::CloseElement();
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+ }
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+
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+ virtual bool isVoidElement (const char *name) {
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+// Complete list of all HTML5 "void elements",
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+// http://dev.w3.org/html5/markup/syntax.html
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+ static const char *list[] = {
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+ "area", "base", "br", "col", "command", "embed", "hr", "img",
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+ "input", "keygen", "link", "meta", "param", "source", "track", "wbr",
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+ NULL
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+ };
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+
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+// I could use 'bsearch', but I don't have MSVC to test on (it would work with gcc/libc).
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+ for (const char **p = list; *p; ++p) {
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+ if (!strcasecmp (name, *p)) {
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+ return true;
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+ }
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+ }
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+
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+ return false;
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+ }
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+};
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+
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+int main (void) {
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+ XMLDocument doc (false);
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+ doc.Parse (input);
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+
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+ std::cout << "INPUT:\n" << input << "\n\n";
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+
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+ XMLPrinter prn (NULL, true);
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+ doc.Print (&prn);
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+ std::cout << "XMLPrinter (not valid HTML5):\n" << prn.CStr() << "\n\n";
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+
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+ XMLPrinterHTML5 html5 (NULL, true);
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+ doc.Print (&html5);
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+ std::cout << "XMLPrinterHTML5:\n" << html5.CStr() << "\n";
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+
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+ return 0;
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+}
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Dennis Jenkins