From 9460e5093c13c0b798484ca33bee4e2875b72f14 Mon Sep 17 00:00:00 2001 From: Dennis Jenkins Date: Fri, 11 Oct 2013 16:48:55 -0500 Subject: [PATCH] Demo/example/contrib of using tinyxml2 to generate confomant HTML5. --- contrib/html5-printer.cpp | 87 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 contrib/html5-printer.cpp diff --git a/contrib/html5-printer.cpp b/contrib/html5-printer.cpp new file mode 100644 index 0000000..4ad63bb --- /dev/null +++ b/contrib/html5-printer.cpp @@ -0,0 +1,87 @@ +// 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; +}