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 vector<Directive *> &subdirectives)
  35         : subdirectives(subdirectives) {}
  36
  37 Clone::Clone(initializer_list<Directive *> subdirectives)
  38         : subdirectives(subdirectives) {}
  39
  40 void Clone::process(xmlNode *node, bool clean)
  41 {
  42         // We can't use xmlNewDocFragment, since xmlDOMWrapCloneNode only knows
  43         // how to clone elements.
  44         vector<xmlNode *> new_nodes;
  45
  46         for (auto it : subdirectives) {
  47                 xmlNode *new_node;
  48                 xmlDOMWrapCloneNode(NULL, node->doc, node, &new_node, node->doc, NULL, 1, 0);
  49                 it->process(new_node, clean);
  50                 for (xmlNode *child = new_node->children; child != NULL; child = child->next) {
  51                         new_nodes.push_back(child);
  52                 }
  53         }
  54
  55         node->children = NULL;
  56         for (auto child : new_nodes) {
  57                 xmlAddChild(node, child);
  58         }
  59         if (clean) {
  60                 clean_node(node);
  61         }
  62 }
  63
  64 Substitute::Substitute(const unordered_map<string, Directive*> &substitution_map)
  65         : substitution_map(substitution_map) {}
  66
  67 Substitute::Substitute(initializer_list<pair<const string, Directive*>> substitution_map)
  68         : substitution_map(substitution_map) {}
  69
  70 void Substitute::process(xmlNode *node, bool clean)
  71 {
  72         for (xmlNode *child = node->children; child != NULL; child = child->next) {
  73                 bool processed = false;
  74
  75                 if (child->type == XML_ELEMENT_NODE) {
  76                         // Find the ID, if any.
  77                         string id;
  78                         for (xmlAttr *attr = child->properties; attr != NULL; attr = attr->next) {
  79                                 if (strcmp(reinterpret_cast<const char *>(attr->ns->href), "http://template.sesse.net/") == 0 &&
  80                                     strcmp(reinterpret_cast<const char *>(attr->name), "id") == 0) {
  81                                         id = reinterpret_cast<const char *>(xmlNodeGetContent(attr->children));
  82
  83                                         if (clean) {
  84                                                 if (attr->prev == NULL) {
  85                                                         child->properties = attr->next;
  86                                                 } else {
  87                                                         attr->prev->next = attr->next;
  88                                                 }
  89                                         }
  90                                 }
  91                         }
  92
  93                         // Check all substitutions to see if we found anything appropriate.
  94                         for (auto it : substitution_map) {
  95                                 if (it.first == reinterpret_cast<const char *>(child->name) ||
  96                                     (!id.empty() && it.first == ("#" + id))) {
  97                                         it.second->process(child, clean);
  98                                         processed = true;
  99                                         break;
 100                                 }
 101                         }
 102                 }
 103
 104                 if (!processed) {
 105                         process(child, clean);
 106                 }
 107         }
 108         if (clean) {
 109                 clean_node(node);
 110         }
 111 }
 112
 113 void process_file(const string &input_filename,
 114                   const string &output_filename,
 115                   Directive *root_directive)
 116 {
 117         LIBXML_TEST_VERSION
 118
 119         xmlDocPtr doc = xmlParseFile(input_filename.c_str());
 120         root_directive->process(xmlDocGetRootElement(doc), true);
 121         xmlSaveFile(output_filename.c_str(), doc);
 122
 123         xmlCleanupParser();
 124         xmlMemoryDump();
 125 }