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422 lines
16 KiB
C++
422 lines
16 KiB
C++
#ifndef RAPIDXML_PRINT_HPP_INCLUDED
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#define RAPIDXML_PRINT_HPP_INCLUDED
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// Copyright (C) 2006, 2009 Marcin Kalicinski
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// Version 1.13
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// Revision $DateTime: 2009/05/13 01:46:17 $
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//! \file rapidxml_print.hpp This file contains rapidxml printer implementation
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#include "rapidxml.hpp"
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// Only include streams if not disabled
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#ifndef RAPIDXML_NO_STREAMS
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#include <ostream>
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#include <iterator>
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#endif
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namespace rapidxml
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{
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///////////////////////////////////////////////////////////////////////
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// Printing flags
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const int print_no_indenting = 0x1; //!< Printer flag instructing the printer to suppress indenting of XML. See print() function.
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///////////////////////////////////////////////////////////////////////
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// Internal
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//! \cond internal
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namespace internal
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{
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///////////////////////////////////////////////////////////////////////////
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// Internal character operations
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// Copy characters from given range to given output iterator
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template<class OutIt, class Ch>
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inline OutIt copy_chars(const Ch *begin, const Ch *end, OutIt out)
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{
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while (begin != end)
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*out++ = *begin++;
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return out;
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}
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// Copy characters from given range to given output iterator and expand
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// characters into references (< > ' " &)
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template<class OutIt, class Ch>
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inline OutIt copy_and_expand_chars(const Ch *begin, const Ch *end, Ch noexpand, OutIt out)
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{
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while (begin != end)
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{
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if (*begin == noexpand)
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{
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*out++ = *begin; // No expansion, copy character
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}
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else
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{
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switch (*begin)
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{
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case Ch('<'):
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*out++ = Ch('&'); *out++ = Ch('l'); *out++ = Ch('t'); *out++ = Ch(';');
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break;
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case Ch('>'):
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*out++ = Ch('&'); *out++ = Ch('g'); *out++ = Ch('t'); *out++ = Ch(';');
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break;
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case Ch('\''):
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*out++ = Ch('&'); *out++ = Ch('a'); *out++ = Ch('p'); *out++ = Ch('o'); *out++ = Ch('s'); *out++ = Ch(';');
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break;
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case Ch('"'):
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*out++ = Ch('&'); *out++ = Ch('q'); *out++ = Ch('u'); *out++ = Ch('o'); *out++ = Ch('t'); *out++ = Ch(';');
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break;
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case Ch('&'):
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*out++ = Ch('&'); *out++ = Ch('a'); *out++ = Ch('m'); *out++ = Ch('p'); *out++ = Ch(';');
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break;
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default:
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*out++ = *begin; // No expansion, copy character
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}
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}
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++begin; // Step to next character
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}
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return out;
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}
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// Fill given output iterator with repetitions of the same character
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template<class OutIt, class Ch>
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inline OutIt fill_chars(OutIt out, int n, Ch ch)
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{
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for (int i = 0; i < n; ++i)
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*out++ = ch;
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return out;
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}
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// Find character
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template<class Ch, Ch ch>
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inline bool find_char(const Ch *begin, const Ch *end)
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{
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while (begin != end)
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if (*begin++ == ch)
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return true;
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return false;
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}
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///////////////////////////////////////////////////////////////////////////
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// Internal printing operations
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// Print node
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template<class OutIt, class Ch>
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inline OutIt print_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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// Print proper node type
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switch (node->type())
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{
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// Document
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case node_document:
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out = print_children(out, node, flags, indent);
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break;
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// Element
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case node_element:
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out = print_element_node(out, node, flags, indent);
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break;
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// Data
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case node_data:
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out = print_data_node(out, node, flags, indent);
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break;
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// CDATA
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case node_cdata:
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out = print_cdata_node(out, node, flags, indent);
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break;
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// Declaration
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case node_declaration:
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out = print_declaration_node(out, node, flags, indent);
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break;
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// Comment
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case node_comment:
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out = print_comment_node(out, node, flags, indent);
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break;
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// Doctype
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case node_doctype:
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out = print_doctype_node(out, node, flags, indent);
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break;
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// Pi
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case node_pi:
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out = print_pi_node(out, node, flags, indent);
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break;
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// Unknown
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default:
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assert(0);
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break;
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}
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// If indenting not disabled, add line break after node
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if (!(flags & print_no_indenting))
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*out = Ch('\n'), ++out;
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// Return modified iterator
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return out;
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}
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// Print children of the node
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template<class OutIt, class Ch>
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inline OutIt print_children(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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for (xml_node<Ch> *child = node->first_node(); child; child = child->next_sibling())
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out = print_node(out, child, flags, indent);
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return out;
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}
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// Print attributes of the node
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template<class OutIt, class Ch>
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inline OutIt print_attributes(OutIt out, const xml_node<Ch> *node, int flags)
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{
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for (xml_attribute<Ch> *attribute = node->first_attribute(); attribute; attribute = attribute->next_attribute())
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{
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if (attribute->name() && attribute->value())
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{
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// Print attribute name
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*out = Ch(' '), ++out;
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out = copy_chars(attribute->name(), attribute->name() + attribute->name_size(), out);
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*out = Ch('='), ++out;
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// Print attribute value using appropriate quote type
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if (find_char<Ch, Ch('"')>(attribute->value(), attribute->value() + attribute->value_size()))
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{
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*out = Ch('\''), ++out;
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out = copy_and_expand_chars(attribute->value(), attribute->value() + attribute->value_size(), Ch('"'), out);
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*out = Ch('\''), ++out;
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}
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else
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{
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*out = Ch('"'), ++out;
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out = copy_and_expand_chars(attribute->value(), attribute->value() + attribute->value_size(), Ch('\''), out);
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*out = Ch('"'), ++out;
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}
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}
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}
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return out;
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}
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// Print data node
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template<class OutIt, class Ch>
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inline OutIt print_data_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_data);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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out = copy_and_expand_chars(node->value(), node->value() + node->value_size(), Ch(0), out);
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return out;
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}
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// Print data node
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template<class OutIt, class Ch>
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inline OutIt print_cdata_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_cdata);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'); ++out;
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*out = Ch('!'); ++out;
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*out = Ch('['); ++out;
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*out = Ch('C'); ++out;
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*out = Ch('D'); ++out;
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*out = Ch('A'); ++out;
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*out = Ch('T'); ++out;
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*out = Ch('A'); ++out;
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*out = Ch('['); ++out;
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out = copy_chars(node->value(), node->value() + node->value_size(), out);
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*out = Ch(']'); ++out;
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*out = Ch(']'); ++out;
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*out = Ch('>'); ++out;
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return out;
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}
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// Print element node
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template<class OutIt, class Ch>
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inline OutIt print_element_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_element);
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// Print element name and attributes, if any
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'), ++out;
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out = copy_chars(node->name(), node->name() + node->name_size(), out);
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out = print_attributes(out, node, flags);
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// If node is childless
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if (node->value_size() == 0 && !node->first_node())
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{
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// Print childless node tag ending
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*out = Ch('/'), ++out;
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*out = Ch('>'), ++out;
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}
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else
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{
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// Print normal node tag ending
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*out = Ch('>'), ++out;
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// Test if node contains a single data node only (and no other nodes)
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xml_node<Ch> *child = node->first_node();
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if (!child)
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{
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// If node has no children, only print its value without indenting
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out = copy_and_expand_chars(node->value(), node->value() + node->value_size(), Ch(0), out);
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}
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else if (child->next_sibling() == 0 && child->type() == node_data)
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{
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// If node has a sole data child, only print its value without indenting
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out = copy_and_expand_chars(child->value(), child->value() + child->value_size(), Ch(0), out);
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}
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else
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{
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// Print all children with full indenting
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if (!(flags & print_no_indenting))
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*out = Ch('\n'), ++out;
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out = print_children(out, node, flags, indent + 1);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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}
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// Print node end
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*out = Ch('<'), ++out;
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*out = Ch('/'), ++out;
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out = copy_chars(node->name(), node->name() + node->name_size(), out);
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*out = Ch('>'), ++out;
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}
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return out;
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}
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// Print declaration node
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template<class OutIt, class Ch>
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inline OutIt print_declaration_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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// Print declaration start
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'), ++out;
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*out = Ch('?'), ++out;
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*out = Ch('x'), ++out;
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*out = Ch('m'), ++out;
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*out = Ch('l'), ++out;
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// Print attributes
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out = print_attributes(out, node, flags);
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// Print declaration end
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*out = Ch('?'), ++out;
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*out = Ch('>'), ++out;
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return out;
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}
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// Print comment node
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template<class OutIt, class Ch>
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inline OutIt print_comment_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_comment);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'), ++out;
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*out = Ch('!'), ++out;
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*out = Ch('-'), ++out;
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*out = Ch('-'), ++out;
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out = copy_chars(node->value(), node->value() + node->value_size(), out);
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*out = Ch('-'), ++out;
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*out = Ch('-'), ++out;
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*out = Ch('>'), ++out;
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return out;
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}
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// Print doctype node
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template<class OutIt, class Ch>
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inline OutIt print_doctype_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_doctype);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'), ++out;
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*out = Ch('!'), ++out;
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*out = Ch('D'), ++out;
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*out = Ch('O'), ++out;
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*out = Ch('C'), ++out;
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*out = Ch('T'), ++out;
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*out = Ch('Y'), ++out;
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*out = Ch('P'), ++out;
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*out = Ch('E'), ++out;
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*out = Ch(' '), ++out;
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out = copy_chars(node->value(), node->value() + node->value_size(), out);
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*out = Ch('>'), ++out;
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return out;
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}
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// Print pi node
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template<class OutIt, class Ch>
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inline OutIt print_pi_node(OutIt out, const xml_node<Ch> *node, int flags, int indent)
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{
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assert(node->type() == node_pi);
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if (!(flags & print_no_indenting))
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out = fill_chars(out, indent, Ch('\t'));
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*out = Ch('<'), ++out;
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*out = Ch('?'), ++out;
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out = copy_chars(node->name(), node->name() + node->name_size(), out);
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*out = Ch(' '), ++out;
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out = copy_chars(node->value(), node->value() + node->value_size(), out);
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*out = Ch('?'), ++out;
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*out = Ch('>'), ++out;
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return out;
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}
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}
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//! \endcond
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///////////////////////////////////////////////////////////////////////////
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// Printing
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//! Prints XML to given output iterator.
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//! \param out Output iterator to print to.
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//! \param node Node to be printed. Pass xml_document to print entire document.
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//! \param flags Flags controlling how XML is printed.
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//! \return Output iterator pointing to position immediately after last character of printed text.
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template<class OutIt, class Ch>
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inline OutIt print(OutIt out, const xml_node<Ch> &node, int flags = 0)
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{
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return internal::print_node(out, &node, flags, 0);
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}
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#ifndef RAPIDXML_NO_STREAMS
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//! Prints XML to given output stream.
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//! \param out Output stream to print to.
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//! \param node Node to be printed. Pass xml_document to print entire document.
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//! \param flags Flags controlling how XML is printed.
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//! \return Output stream.
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template<class Ch>
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inline std::basic_ostream<Ch> &print(std::basic_ostream<Ch> &out, const xml_node<Ch> &node, int flags = 0)
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{
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print(std::ostream_iterator<Ch>(out), node, flags);
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return out;
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}
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//! Prints formatted XML to given output stream. Uses default printing flags. Use print() function to customize printing process.
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//! \param out Output stream to print to.
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//! \param node Node to be printed.
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//! \return Output stream.
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template<class Ch>
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inline std::basic_ostream<Ch> &operator <<(std::basic_ostream<Ch> &out, const xml_node<Ch> &node)
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{
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return print(out, node);
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}
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#endif
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}
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#endif
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