// 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, see below) // This example is a small contribution to the world! Enjoy it! /* This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. */ #include "../tinyxml2.h" #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())) { SealElementIfJustOpened(); } 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; }