1 /*
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "webrtc/libjingle/xmllite/xmlbuilder.h"
12
13 #include <set>
14 #include <vector>
15 #include "webrtc/libjingle/xmllite/xmlconstants.h"
16 #include "webrtc/libjingle/xmllite/xmlelement.h"
17 #include "webrtc/base/common.h"
18
19 namespace buzz {
20
XmlBuilder()21 XmlBuilder::XmlBuilder() :
22 pelCurrent_(NULL),
23 pelRoot_(),
24 pvParents_(new std::vector<XmlElement *>()) {
25 }
26
27 void
Reset()28 XmlBuilder::Reset() {
29 pelRoot_.reset();
30 pelCurrent_ = NULL;
31 pvParents_->clear();
32 }
33
34 XmlElement *
BuildElement(XmlParseContext * pctx,const char * name,const char ** atts)35 XmlBuilder::BuildElement(XmlParseContext * pctx,
36 const char * name, const char ** atts) {
37 QName tagName(pctx->ResolveQName(name, false));
38 if (tagName.IsEmpty())
39 return NULL;
40
41 XmlElement * pelNew = new XmlElement(tagName);
42
43 if (!*atts)
44 return pelNew;
45
46 std::set<QName> seenNonlocalAtts;
47
48 while (*atts) {
49 QName attName(pctx->ResolveQName(*atts, true));
50 if (attName.IsEmpty()) {
51 delete pelNew;
52 return NULL;
53 }
54
55 // verify that namespaced names are unique
56 if (!attName.Namespace().empty()) {
57 if (seenNonlocalAtts.count(attName)) {
58 delete pelNew;
59 return NULL;
60 }
61 seenNonlocalAtts.insert(attName);
62 }
63
64 pelNew->AddAttr(attName, std::string(*(atts + 1)));
65 atts += 2;
66 }
67
68 return pelNew;
69 }
70
71 void
StartElement(XmlParseContext * pctx,const char * name,const char ** atts)72 XmlBuilder::StartElement(XmlParseContext * pctx,
73 const char * name, const char ** atts) {
74 XmlElement * pelNew = BuildElement(pctx, name, atts);
75 if (pelNew == NULL) {
76 pctx->RaiseError(XML_ERROR_SYNTAX);
77 return;
78 }
79
80 if (!pelCurrent_) {
81 pelCurrent_ = pelNew;
82 pelRoot_.reset(pelNew);
83 pvParents_->push_back(NULL);
84 } else {
85 pelCurrent_->AddElement(pelNew);
86 pvParents_->push_back(pelCurrent_);
87 pelCurrent_ = pelNew;
88 }
89 }
90
91 void
EndElement(XmlParseContext * pctx,const char * name)92 XmlBuilder::EndElement(XmlParseContext * pctx, const char * name) {
93 RTC_UNUSED(pctx);
94 RTC_UNUSED(name);
95 pelCurrent_ = pvParents_->back();
96 pvParents_->pop_back();
97 }
98
99 void
CharacterData(XmlParseContext * pctx,const char * text,int len)100 XmlBuilder::CharacterData(XmlParseContext * pctx,
101 const char * text, int len) {
102 RTC_UNUSED(pctx);
103 if (pelCurrent_) {
104 pelCurrent_->AddParsedText(text, len);
105 }
106 }
107
108 void
Error(XmlParseContext * pctx,XML_Error err)109 XmlBuilder::Error(XmlParseContext * pctx, XML_Error err) {
110 RTC_UNUSED(pctx);
111 RTC_UNUSED(err);
112 pelRoot_.reset(NULL);
113 pelCurrent_ = NULL;
114 pvParents_->clear();
115 }
116
117 XmlElement *
CreateElement()118 XmlBuilder::CreateElement() {
119 return pelRoot_.release();
120 }
121
122 XmlElement *
BuiltElement()123 XmlBuilder::BuiltElement() {
124 return pelRoot_.get();
125 }
126
~XmlBuilder()127 XmlBuilder::~XmlBuilder() {
128 }
129
130 } // namespace buzz
131