git.sesse.net Git - xml-template/blob - c++0x/xml-template.cpp

   1 #include "xml-template.h"
   2
   3 #include <string.h>
   4 #include <libxml/parser.h>
   5
   6 using namespace std;
   7
   8 namespace {
   9
  10 void clean_node(xmlNode *node)
  11 {
  12         if (node->type != XML_ELEMENT_NODE) {
  13                 return;
  14         }
  15         if (strcmp(reinterpret_cast<const char *>(node->ns->href), "http://template.sesse.net/") == 0) {
  16                 xmlNode *frag = xmlNewDocFragment(node->doc);
  17                 xmlReplaceNode(node, frag);
  18                 frag->children = node->children;
  19         }
  20 }
  21
  22 }  // namespace
  23
  24 Replace::Replace(const string &str)
  25         : str(str) {}
  26
  27 void Replace::process(xmlNode *node, bool clean) {
  28         node->children = xmlNewTextLen(reinterpret_cast<const xmlChar *>(str.data()), str.size());
  29         if (clean) {
  30                 clean_node(node);
  31         }
  32 }
  33
  34 Clone::Clone(const std::vector<Directive *> &subdirectives)
  35         : subdirectives(subdirectives) {}
  36
  37 void Clone::process(xmlNode *node, bool clean) {
  38         // We can't use xmlNewDocFragment, since xmlDOMWrapCloneNode only knows
  39         // how to clone elements.
  40         vector<xmlNode *> new_nodes;
  41
  42         for (auto it : subdirectives) {
  43                 xmlNode *new_node;
  44                 xmlDOMWrapCloneNode(NULL, node->doc, node, &new_node, node->doc, NULL, 1, 0);
  45                 it->process(new_node, clean);
  46                 for (xmlNode *child = new_node->children; child != NULL; child = child->next) {
  47                         new_nodes.push_back(child);
  48                 }
  49         }
  50
  51         node->children = NULL;
  52         for (auto child : new_nodes) {
  53                 xmlAddChild(node, child);
  54         }
  55         if (clean) {
  56                 clean_node(node);
  57         }
  58 }
  59
  60 Substitute::Substitute(const unordered_map<string, Directive*> &substitution_map)
  61         : substitution_map(substitution_map) {}
  62
  63 void Substitute::process(xmlNode *node, bool clean) {
  64         for (xmlNode *child = node->children; child != NULL; child = child->next) {
  65                 bool processed = false;
  66
  67                 if (child->type == XML_ELEMENT_NODE) {
  68                         // Find the ID, if any.
  69                         string id;
  70                         for (xmlAttr *attr = child->properties; attr != NULL; attr = attr->next) {
  71                                 if (strcmp(reinterpret_cast<const char *>(attr->ns->href), "http://template.sesse.net/") == 0 &&
  72                                     strcmp(reinterpret_cast<const char *>(attr->name), "id") == 0) {
  73                                         id = reinterpret_cast<const char *>(xmlNodeGetContent(attr->children));
  74
  75                                         if (clean) {
  76                                                 if (attr->prev == NULL) {
  77                                                         child->properties = attr->next;
  78                                                 } else {
  79                                                         attr->prev->next = attr->next;
  80                                                 }
  81                                         }
  82                                 }
  83                         }
  84
  85                         // Check all substitutions to see if we found anything appropriate.
  86                         for (auto it : substitution_map) {
  87                                 if (it.first == reinterpret_cast<const char *>(child->name) ||
  88                                     (!id.empty() && it.first == ("#" + id))) {
  89                                         it.second->process(child, clean);
  90                                         processed = true;
  91                                         break;
  92                                 }
  93                         }
  94                 }
  95
  96                 if (!processed) {
  97                         process(child, clean);
  98                 }
  99         }
 100         if (clean) {
 101                 clean_node(node);
 102         }
 103 }
 104
 105 void process_file(const string &input_filename,
 106                   const string &output_filename,
 107                   Directive *root_directive)
 108 {
 109         LIBXML_TEST_VERSION
 110
 111         xmlDocPtr doc = xmlParseFile(input_filename.c_str());
 112         root_directive->process(xmlDocGetRootElement(doc), true);
 113         xmlSaveFile(output_filename.c_str(), doc);
 114
 115         xmlCleanupParser();
 116         xmlMemoryDump();
 117 }