2 * Copyright 2001-2009 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 * Simple template replacement engine.
24 #include "util/TemplateEngine.h"
26 using namespace xmltooling;
29 void TemplateEngine::setTagPrefix(const char* tagPrefix)
31 keytag = string("<") + tagPrefix + " ";
32 iftag = string("<") + tagPrefix + "if ";
33 ifnottag = string("<") + tagPrefix + "ifnot ";
34 ifendtag = string("</") + tagPrefix + "if>";
35 ifnotendtag = string("</") + tagPrefix + "ifnot>";
38 string TemplateEngine::unsafe_chars = "#%&():[]\\`{}";
40 void TemplateEngine::html_encode(ostream& os, const char* start) const
42 while (start && *start) {
44 case '<': os << "<"; break;
45 case '>': os << ">"; break;
46 case '"': os << """; break;
47 case '&': os << "&"; break;
48 case '\'': os << "'"; break;
51 if (unsafe_chars.find_first_of(*start) != string::npos)
52 os << "&#" << static_cast<short>(*start) << ';';
57 case '#': os << "#"; break;
58 case '%': os << "%"; break;
59 case '(': os << "("; break;
60 case ')': os << ")"; break;
61 case ':': os << ":"; break;
62 case '[': os << "["; break;
63 case '\\': os << "\"; break;
64 case ']': os << "]"; break;
65 case '`': os << "`"; break;
66 case '{': os << "{"; break;
67 case '}': os << "}"; break;
68 default: os << *start;
75 void TemplateEngine::trimspace(string& s) const
77 string::size_type end = s.size() - 1, start = 0;
79 // Trim stuff on right.
80 while (end > 0 && !isgraph(s[end])) end--;
82 // Trim stuff on left.
83 while (start < end && !isgraph(s[start])) start++;
86 s = s.substr(start, end - start + 1);
89 void TemplateEngine::process(
94 const TemplateParameters& parameters,
95 const XMLToolingException* e
98 const char* line = buf.c_str();
101 while ((thispos = strchr(lastpos, '<')) != NULL) {
102 // Output the string up to this token.
104 os << buf.substr(lastpos-line, thispos-lastpos);
106 // Make sure this token matches our tokens.
107 #ifdef HAVE_STRCASECMP
108 if (visible && !strncasecmp(thispos, keytag.c_str(), keytag.length()))
110 if (visible && !_strnicmp(thispos, keytag.c_str(), keytag.length()))
113 // Save this position off.
114 lastpos = thispos + keytag.length();
116 // search for the end-tag
117 if ((thispos = strstr(lastpos, "/>")) != NULL) {
118 string key = buf.substr(lastpos-line, thispos-lastpos);
121 const char* p = parameters.getParameter(key.c_str());
123 p = e->getProperty(key.c_str());
126 lastpos = thispos + 2; // strlen("/>")
129 #ifdef HAVE_STRCASECMP
130 else if (!strncasecmp(thispos, iftag.c_str(), iftag.length()))
132 else if (!_strnicmp(thispos, iftag.c_str(), iftag.length()))
135 // Save this position off.
136 lastpos = thispos + iftag.length();
138 // search for the end of this tag
139 if ((thispos = strchr(lastpos, '>')) != NULL) {
140 string key = buf.substr(lastpos-line, thispos-lastpos);
144 cond = parameters.getParameter(key.c_str()) || (e && e->getProperty(key.c_str()));
145 lastpos = thispos + 1; // strlen(">")
146 process(cond, buf, lastpos, os, parameters, e);
149 #ifdef HAVE_STRCASECMP
150 else if (!strncasecmp(thispos, ifendtag.c_str(), ifendtag.length()))
152 else if (!_strnicmp(thispos, ifendtag.c_str(), ifendtag.length()))
155 // Save this position off and pop the stack.
156 lastpos = thispos + ifendtag.length();
159 #ifdef HAVE_STRCASECMP
160 else if (!strncasecmp(thispos, ifnottag.c_str(), ifnottag.length()))
162 else if (!_strnicmp(thispos, ifnottag.c_str(), ifnottag.length()))
165 // Save this position off.
166 lastpos = thispos + ifnottag.length();
168 // search for the end of this tag
169 if ((thispos = strchr(lastpos, '>')) != NULL) {
170 string key = buf.substr(lastpos-line, thispos-lastpos);
174 cond = !(parameters.getParameter(key.c_str()) || (e && e->getProperty(key.c_str())));
175 lastpos = thispos + 1; // strlen(">")
176 process(cond, buf, lastpos, os, parameters, e);
179 #ifdef HAVE_STRCASECMP
180 else if (!strncasecmp(thispos, ifnotendtag.c_str(), ifnotendtag.length()))
182 else if (!_strnicmp(thispos, ifnotendtag.c_str(), ifnotendtag.length()))
185 // Save this position off and pop the stack.
186 lastpos = thispos + ifnotendtag.length();
193 lastpos = thispos + 1;
197 os << buf.substr(lastpos-line);
200 void TemplateEngine::run(istream& is, ostream& os, const TemplateParameters& parameters, const XMLToolingException* e) const
203 while (getline(is, line))
206 const char* pos=buf.c_str();
207 process(true, buf, pos, os, parameters, e);