Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmllite/xmlelement.cc

+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/libjingle/xmllite/xmlelement.h"
+
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include "webrtc/libjingle/xmllite/qname.h"
+#include "webrtc/libjingle/xmllite/xmlbuilder.h"
+#include "webrtc/libjingle/xmllite/xmlconstants.h"
+#include "webrtc/libjingle/xmllite/xmlparser.h"
+#include "webrtc/libjingle/xmllite/xmlprinter.h"
+#include "webrtc/base/common.h"
+
+namespace buzz {
+
+XmlChild::~XmlChild() {
+}
+
+bool XmlText::IsTextImpl() const {
+  return true;
+}
+
+XmlElement* XmlText::AsElementImpl() const {
+  return NULL;
+}
+
+XmlText* XmlText::AsTextImpl() const {
+  return const_cast<XmlText *>(this);
+}
+
+void XmlText::SetText(const std::string& text) {
+  text_ = text;
+}
+
+void XmlText::AddParsedText(const char* buf, int len) {
+  text_.append(buf, len);
+}
+
+void XmlText::AddText(const std::string& text) {
+  text_ += text;
+}
+
+XmlText::~XmlText() {
+}
+
+XmlElement::XmlElement(const QName& name) :
+    name_(name),
+    first_attr_(NULL),
+    last_attr_(NULL),
+    first_child_(NULL),
+    last_child_(NULL),
+    cdata_(false) {
+}
+
+XmlElement::XmlElement(const XmlElement& elt) :
+    XmlChild(),
+    name_(elt.name_),
+    first_attr_(NULL),
+    last_attr_(NULL),
+    first_child_(NULL),
+    last_child_(NULL),
+    cdata_(false) {
+
+  // copy attributes
+  XmlAttr* attr;
+  XmlAttr ** plast_attr = &first_attr_;
+  XmlAttr* newAttr = NULL;
+  for (attr = elt.first_attr_; attr; attr = attr->NextAttr()) {
+    newAttr = new XmlAttr(*attr);
+    *plast_attr = newAttr;
+    plast_attr = &(newAttr->next_attr_);
+  }
+  last_attr_ = newAttr;
+
+  // copy children
+  XmlChild* pChild;
+  XmlChild ** ppLast = &first_child_;
+  XmlChild* newChild = NULL;
+
+  for (pChild = elt.first_child_; pChild; pChild = pChild->NextChild()) {
+    if (pChild->IsText()) {
+      newChild = new XmlText(*(pChild->AsText()));
+    } else {
+      newChild = new XmlElement(*(pChild->AsElement()));
+    }
+    *ppLast = newChild;
+    ppLast = &(newChild->next_child_);
+  }
+  last_child_ = newChild;
+
+  cdata_ = elt.cdata_;
+}
+
+XmlElement::XmlElement(const QName& name, bool useDefaultNs) :
+  name_(name),
+  first_attr_(useDefaultNs ? new XmlAttr(QN_XMLNS, name.Namespace()) : NULL),
+  last_attr_(first_attr_),
+  first_child_(NULL),
+  last_child_(NULL),
+  cdata_(false) {
+}
+
+bool XmlElement::IsTextImpl() const {
+  return false;
+}
+
+XmlElement* XmlElement::AsElementImpl() const {
+  return const_cast<XmlElement *>(this);
+}
+
+XmlText* XmlElement::AsTextImpl() const {
+  return NULL;
+}
+
+const std::string XmlElement::BodyText() const {
+  if (first_child_ && first_child_->IsText() && last_child_ == first_child_) {
+    return first_child_->AsText()->Text();
+  }
+
+  return std::string();
+}
+
+void XmlElement::SetBodyText(const std::string& text) {
+  if (text.empty()) {
+    ClearChildren();
+  } else if (first_child_ == NULL) {
+    AddText(text);
+  } else if (first_child_->IsText() && last_child_ == first_child_) {
+    first_child_->AsText()->SetText(text);
+  } else {
+    ClearChildren();
+    AddText(text);
+  }
+}
+
+const QName XmlElement::FirstElementName() const {
+  const XmlElement* element = FirstElement();
+  if (element == NULL)
+    return QName();
+  return element->Name();
+}
+
+XmlAttr* XmlElement::FirstAttr() {
+  return first_attr_;
+}
+
+const std::string XmlElement::Attr(const StaticQName& name) const {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      return attr->value_;
+  }
+  return std::string();
+}
+
+const std::string XmlElement::Attr(const QName& name) const {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      return attr->value_;
+  }
+  return std::string();
+}
+
+bool XmlElement::HasAttr(const StaticQName& name) const {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      return true;
+  }
+  return false;
+}
+
+bool XmlElement::HasAttr(const QName& name) const {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      return true;
+  }
+  return false;
+}
+
+void XmlElement::SetAttr(const QName& name, const std::string& value) {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      break;
+  }
+  if (!attr) {
+    attr = new XmlAttr(name, value);
+    if (last_attr_)
+      last_attr_->next_attr_ = attr;
+    else
+      first_attr_ = attr;
+    last_attr_ = attr;
+    return;
+  }
+  attr->value_ = value;
+}
+
+void XmlElement::ClearAttr(const QName& name) {
+  XmlAttr* attr;
+  XmlAttr* last_attr = NULL;
+  for (attr = first_attr_; attr; attr = attr->next_attr_) {
+    if (attr->name_ == name)
+      break;
+    last_attr = attr;
+  }
+  if (!attr)
+    return;
+  if (!last_attr)
+    first_attr_ = attr->next_attr_;
+  else
+    last_attr->next_attr_ = attr->next_attr_;
+  if (last_attr_ == attr)
+    last_attr_ = last_attr;
+  delete attr;
+}
+
+XmlChild* XmlElement::FirstChild() {
+  return first_child_;
+}
+
+XmlElement* XmlElement::FirstElement() {
+  XmlChild* pChild;
+  for (pChild = first_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText())
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement* XmlElement::NextElement() {
+  XmlChild* pChild;
+  for (pChild = next_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText())
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement* XmlElement::FirstWithNamespace(const std::string& ns) {
+  XmlChild* pChild;
+  for (pChild = first_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name().Namespace() == ns)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement *
+XmlElement::NextWithNamespace(const std::string& ns) {
+  XmlChild* pChild;
+  for (pChild = next_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name().Namespace() == ns)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement *
+XmlElement::FirstNamed(const QName& name) {
+  XmlChild* pChild;
+  for (pChild = first_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name() == name)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement *
+XmlElement::FirstNamed(const StaticQName& name) {
+  XmlChild* pChild;
+  for (pChild = first_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name() == name)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement *
+XmlElement::NextNamed(const QName& name) {
+  XmlChild* pChild;
+  for (pChild = next_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name() == name)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement *
+XmlElement::NextNamed(const StaticQName& name) {
+  XmlChild* pChild;
+  for (pChild = next_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name() == name)
+      return pChild->AsElement();
+  }
+  return NULL;
+}
+
+XmlElement* XmlElement::FindOrAddNamedChild(const QName& name) {
+  XmlElement* child = FirstNamed(name);
+  if (!child) {
+    child = new XmlElement(name);
+    AddElement(child);
+  }
+
+  return child;
+}
+
+const std::string XmlElement::TextNamed(const QName& name) const {
+  XmlChild* pChild;
+  for (pChild = first_child_; pChild; pChild = pChild->next_child_) {
+    if (!pChild->IsText() && pChild->AsElement()->Name() == name)
+      return pChild->AsElement()->BodyText();
+  }
+  return std::string();
+}
+
+void XmlElement::InsertChildAfter(XmlChild* predecessor, XmlChild* next) {
+  if (predecessor == NULL) {
+    next->next_child_ = first_child_;
+    first_child_ = next;
+  }
+  else {
+    next->next_child_ = predecessor->next_child_;
+    predecessor->next_child_ = next;
+  }
+}
+
+void XmlElement::RemoveChildAfter(XmlChild* predecessor) {
+  XmlChild* next;
+
+  if (predecessor == NULL) {
+    next = first_child_;
+    first_child_ = next->next_child_;
+  }
+  else {
+    next = predecessor->next_child_;
+    predecessor->next_child_ = next->next_child_;
+  }
+
+  if (last_child_ == next)
+    last_child_ = predecessor;
+
+  delete next;
+}
+
+void XmlElement::AddAttr(const QName& name, const std::string& value) {
+  ASSERT(!HasAttr(name));
+
+  XmlAttr ** pprev = last_attr_ ? &(last_attr_->next_attr_) : &first_attr_;
+  last_attr_ = (*pprev = new XmlAttr(name, value));
+}
+
+void XmlElement::AddAttr(const QName& name, const std::string& value,
+                         int depth) {
+  XmlElement* element = this;
+  while (depth--) {
+    element = element->last_child_->AsElement();
+  }
+  element->AddAttr(name, value);
+}
+
+void XmlElement::AddParsedText(const char* cstr, int len) {
+  if (len == 0)
+    return;
+
+  if (last_child_ && last_child_->IsText()) {
+    last_child_->AsText()->AddParsedText(cstr, len);
+    return;
+  }
+  XmlChild ** pprev = last_child_ ? &(last_child_->next_child_) : &first_child_;
+  last_child_ = *pprev = new XmlText(cstr, len);
+}
+
+void XmlElement::AddCDATAText(const char* buf, int len) {
+  cdata_ = true;
+  AddParsedText(buf, len);
+}
+
+void XmlElement::AddText(const std::string& text) {
+  if (text == STR_EMPTY)
+    return;
+
+  if (last_child_ && last_child_->IsText()) {
+    last_child_->AsText()->AddText(text);
+    return;
+  }
+  XmlChild ** pprev = last_child_ ? &(last_child_->next_child_) : &first_child_;
+  last_child_ = *pprev = new XmlText(text);
+}
+
+void XmlElement::AddText(const std::string& text, int depth) {
+  // note: the first syntax is ambigious for msvc 6
+  // XmlElement* pel(this);
+  XmlElement* element = this;
+  while (depth--) {
+    element = element->last_child_->AsElement();
+  }
+  element->AddText(text);
+}
+
+void XmlElement::AddElement(XmlElement *child) {
+  if (child == NULL)
+    return;
+
+  XmlChild ** pprev = last_child_ ? &(last_child_->next_child_) : &first_child_;
+  *pprev = child;
+  last_child_ = child;
+  child->next_child_ = NULL;
+}
+
+void XmlElement::AddElement(XmlElement *child, int depth) {
+  XmlElement* element = this;
+  while (depth--) {
+    element = element->last_child_->AsElement();
+  }
+  element->AddElement(child);
+}
+
+void XmlElement::ClearNamedChildren(const QName& name) {
+  XmlChild* prev_child = NULL;
+  XmlChild* next_child;
+  XmlChild* child;
+  for (child = FirstChild(); child; child = next_child) {
+    next_child = child->NextChild();
+    if (!child->IsText() && child->AsElement()->Name() == name)
+    {
+      RemoveChildAfter(prev_child);
+      continue;
+    }
+    prev_child = child;
+  }
+}
+
+void XmlElement::ClearAttributes() {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; ) {
+    XmlAttr* to_delete = attr;
+    attr = attr->next_attr_;
+    delete to_delete;
+  }
+  first_attr_ = last_attr_ = NULL;
+}
+
+void XmlElement::ClearChildren() {
+  XmlChild* pchild;
+  for (pchild = first_child_; pchild; ) {
+    XmlChild* to_delete = pchild;
+    pchild = pchild->next_child_;
+    delete to_delete;
+  }
+  first_child_ = last_child_ = NULL;
+}
+
+std::string XmlElement::Str() const {
+  std::stringstream ss;
+  XmlPrinter::PrintXml(&ss, this);
+  return ss.str();
+}
+
+XmlElement* XmlElement::ForStr(const std::string& str) {
+  XmlBuilder builder;
+  XmlParser::ParseXml(&builder, str);
+  return builder.CreateElement();
+}
+
+XmlElement::~XmlElement() {
+  XmlAttr* attr;
+  for (attr = first_attr_; attr; ) {
+    XmlAttr* to_delete = attr;
+    attr = attr->next_attr_;
+    delete to_delete;
+  }
+
+  XmlChild* pchild;
+  for (pchild = first_child_; pchild; ) {
+    XmlChild* to_delete = pchild;
+    pchild = pchild->next_child_;
+    delete to_delete;
+  }
+}
+
+}  // namespace buzz