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source: webrtc/talk/xmllite/xmlprinter.cc @ 0:4bda6873e34c

pub_scrub_3792 tip
Last change on this file since 0:4bda6873e34c was 0:4bda6873e34c, checked in by Michael Prittie <mprittie@…>, 6 years ago

Scrubbed password for publication.

File size: 5.9 KB
Line 
1/*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "talk/xmllite/xmlprinter.h"
29
30#include <sstream>
31#include <string>
32#include <vector>
33
34#include "talk/xmllite/xmlconstants.h"
35#include "talk/xmllite/xmlelement.h"
36#include "talk/xmllite/xmlnsstack.h"
37
38namespace buzz {
39
40class XmlPrinterImpl {
41public:
42  XmlPrinterImpl(std::ostream* pout, XmlnsStack* ns_stack);
43  void PrintElement(const XmlElement* element);
44  void PrintQuotedValue(const std::string& text);
45  void PrintBodyText(const std::string& text);
46  void PrintCDATAText(const std::string& text);
47
48private:
49  std::ostream *pout_;
50  XmlnsStack* ns_stack_;
51};
52
53void XmlPrinter::PrintXml(std::ostream* pout, const XmlElement* element) {
54  XmlnsStack ns_stack;
55  PrintXml(pout, element, &ns_stack);
56}
57
58void XmlPrinter::PrintXml(std::ostream* pout, const XmlElement* element,
59                          XmlnsStack* ns_stack) {
60  XmlPrinterImpl printer(pout, ns_stack);
61  printer.PrintElement(element);
62}
63
64XmlPrinterImpl::XmlPrinterImpl(std::ostream* pout, XmlnsStack* ns_stack)
65    : pout_(pout),
66      ns_stack_(ns_stack) {
67}
68
69void XmlPrinterImpl::PrintElement(const XmlElement* element) {
70  ns_stack_->PushFrame();
71
72  // first go through attrs of pel to add xmlns definitions
73  const XmlAttr* attr;
74  for (attr = element->FirstAttr(); attr; attr = attr->NextAttr()) {
75    if (attr->Name() == QN_XMLNS) {
76      ns_stack_->AddXmlns(STR_EMPTY, attr->Value());
77    } else if (attr->Name().Namespace() == NS_XMLNS) {
78      ns_stack_->AddXmlns(attr->Name().LocalPart(),
79                          attr->Value());
80    }
81  }
82
83  // then go through qnames to make sure needed xmlns definitons are added
84  std::vector<std::string> new_ns;
85  std::pair<std::string, bool> prefix;
86  prefix = ns_stack_->AddNewPrefix(element->Name().Namespace(), false);
87  if (prefix.second) {
88    new_ns.push_back(prefix.first);
89    new_ns.push_back(element->Name().Namespace());
90  }
91
92  for (attr = element->FirstAttr(); attr; attr = attr->NextAttr()) {
93    prefix = ns_stack_->AddNewPrefix(attr->Name().Namespace(), true);
94    if (prefix.second) {
95      new_ns.push_back(prefix.first);
96      new_ns.push_back(attr->Name().Namespace());
97    }
98  }
99
100  // print the element name
101  *pout_ << '<' << ns_stack_->FormatQName(element->Name(), false);
102
103  // and the attributes
104  for (attr = element->FirstAttr(); attr; attr = attr->NextAttr()) {
105    *pout_ << ' ' << ns_stack_->FormatQName(attr->Name(), true) << "=\"";
106    PrintQuotedValue(attr->Value());
107    *pout_ << '"';
108  }
109
110  // and the extra xmlns declarations
111  std::vector<std::string>::iterator i(new_ns.begin());
112  while (i < new_ns.end()) {
113    if (*i == STR_EMPTY) {
114      *pout_ << " xmlns=\"" << *(i + 1) << '"';
115    } else {
116      *pout_ << " xmlns:" << *i << "=\"" << *(i + 1) << '"';
117    }
118    i += 2;
119  }
120
121  // now the children
122  const XmlChild* child = element->FirstChild();
123
124  if (child == NULL)
125    *pout_ << "/>";
126  else {
127    *pout_ << '>';
128    while (child) {
129      if (child->IsText()) {
130        if (element->IsCDATA()) {
131          PrintCDATAText(child->AsText()->Text());
132        } else {
133          PrintBodyText(child->AsText()->Text());
134        }
135      } else {
136        PrintElement(child->AsElement());
137      }
138      child = child->NextChild();
139    }
140    *pout_ << "</" << ns_stack_->FormatQName(element->Name(), false) << '>';
141  }
142
143  ns_stack_->PopFrame();
144}
145
146void XmlPrinterImpl::PrintQuotedValue(const std::string& text) {
147  size_t safe = 0;
148  for (;;) {
149    size_t unsafe = text.find_first_of("<>&\"", safe);
150    if (unsafe == std::string::npos)
151      unsafe = text.length();
152    *pout_ << text.substr(safe, unsafe - safe);
153    if (unsafe == text.length())
154      return;
155    switch (text[unsafe]) {
156      case '<': *pout_ << "&lt;"; break;
157      case '>': *pout_ << "&gt;"; break;
158      case '&': *pout_ << "&amp;"; break;
159      case '"': *pout_ << "&quot;"; break;
160    }
161    safe = unsafe + 1;
162    if (safe == text.length())
163      return;
164  }
165}
166
167void XmlPrinterImpl::PrintBodyText(const std::string& text) {
168  size_t safe = 0;
169  for (;;) {
170    size_t unsafe = text.find_first_of("<>&", safe);
171    if (unsafe == std::string::npos)
172      unsafe = text.length();
173    *pout_ << text.substr(safe, unsafe - safe);
174    if (unsafe == text.length())
175      return;
176    switch (text[unsafe]) {
177      case '<': *pout_ << "&lt;"; break;
178      case '>': *pout_ << "&gt;"; break;
179      case '&': *pout_ << "&amp;"; break;
180    }
181    safe = unsafe + 1;
182    if (safe == text.length())
183      return;
184  }
185}
186
187void XmlPrinterImpl::PrintCDATAText(const std::string& text) {
188  *pout_ << "<![CDATA[" << text << "]]>";
189}
190
191}  // namespace buzz
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