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109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
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// g++ -Wall -O2 contrib/html5-printer.cpp -o html5-printer -ltinyxml2
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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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// http://dev.w3.org/html5/markup/syntax.html
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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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// 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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// Author: Dennis Jenkins, dennis (dot) jenkins (dot) 75 (at) gmail (dot) com.
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// License: Same as tinyxml2 (zlib, see below)
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// This example is a small contribution to the world! Enjoy it!
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/*
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#include <tinyxml2.h>
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#include <iostream>
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#if defined (_MSC_VER)
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#define strcasecmp stricmp
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#endif
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using namespace tinyxml2;
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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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// 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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protected:
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virtual void CloseElement () {
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if (_elementJustOpened && !isVoidElement (_stack.PeekTop())) {
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SealElementIfJustOpened();
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}
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XMLPrinter::CloseElement();
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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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// 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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return false;
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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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std::cout << "INPUT:\n" << input << "\n\n";
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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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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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return 0;
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}
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