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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _xmlelement_h_
#define _xmlelement_h_
#include <iosfwd>
#include <string>
#include "talk/base/scoped_ptr.h"
#include "talk/xmllite/qname.h"
namespace buzz {
extern const QName QN_EMPTY;
extern const QName QN_XMLNS;
class XmlChild;
class XmlText;
class XmlElement;
class XmlAttr;
class XmlChild {
friend class XmlElement;
public:
XmlChild * NextChild() { return pNextChild_; }
const XmlChild * NextChild() const { return pNextChild_; }
bool IsText() const { return IsTextImpl(); }
XmlElement * AsElement() { return AsElementImpl(); }
const XmlElement * AsElement() const { return AsElementImpl(); }
XmlText * AsText() { return AsTextImpl(); }
const XmlText * AsText() const { return AsTextImpl(); }
protected:
XmlChild() :
pNextChild_(NULL) {
}
virtual bool IsTextImpl() const = 0;
virtual XmlElement * AsElementImpl() const = 0;
virtual XmlText * AsTextImpl() const = 0;
virtual ~XmlChild();
private:
XmlChild(const XmlChild & noimpl);
XmlChild * pNextChild_;
};
class XmlText : public XmlChild {
public:
explicit XmlText(const std::string & text) :
XmlChild(),
text_(text) {
}
explicit XmlText(const XmlText & t) :
XmlChild(),
text_(t.text_) {
}
explicit XmlText(const char * cstr, size_t len) :
XmlChild(),
text_(cstr, len) {
}
virtual ~XmlText();
const std::string & Text() const { return text_; }
void SetText(const std::string & text);
void AddParsedText(const char * buf, int len);
void AddText(const std::string & text);
protected:
virtual bool IsTextImpl() const;
virtual XmlElement * AsElementImpl() const;
virtual XmlText * AsTextImpl() const;
private:
std::string text_;
};
class XmlAttr {
friend class XmlElement;
public:
XmlAttr * NextAttr() const { return pNextAttr_; }
const QName & Name() const { return name_; }
const std::string & Value() const { return value_; }
private:
explicit XmlAttr(const QName & name, const std::string & value) :
pNextAttr_(NULL),
name_(name),
value_(value) {
}
explicit XmlAttr(const XmlAttr & att) :
pNextAttr_(NULL),
name_(att.name_),
value_(att.value_) {
}
XmlAttr * pNextAttr_;
QName name_;
std::string value_;
};
class XmlElement : public XmlChild {
public:
explicit XmlElement(const QName & name);
explicit XmlElement(const QName & name, bool useDefaultNs);
explicit XmlElement(const XmlElement & elt);
virtual ~XmlElement();
const QName & Name() const { return name_; }
const std::string & BodyText() const;
void SetBodyText(const std::string & text);
const QName & FirstElementName() const;
XmlAttr * FirstAttr();
const XmlAttr * FirstAttr() const
{ return const_cast<XmlElement *>(this)->FirstAttr(); }
//! Attr will return STR_EMPTY if the attribute isn't there:
//! use HasAttr to test presence of an attribute.
const std::string & Attr(const QName & name) const;
bool HasAttr(const QName & name) const;
void SetAttr(const QName & name, const std::string & value);
void ClearAttr(const QName & name);
XmlChild * FirstChild();
const XmlChild * FirstChild() const
{ return const_cast<XmlElement *>(this)->FirstChild(); }
XmlElement * FirstElement();
const XmlElement * FirstElement() const
{ return const_cast<XmlElement *>(this)->FirstElement(); }
XmlElement * NextElement();
const XmlElement * NextElement() const
{ return const_cast<XmlElement *>(this)->NextElement(); }
XmlElement * FirstWithNamespace(const std::string & ns);
const XmlElement * FirstWithNamespace(const std::string & ns) const
{ return const_cast<XmlElement *>(this)->FirstWithNamespace(ns); }
XmlElement * NextWithNamespace(const std::string & ns);
const XmlElement * NextWithNamespace(const std::string & ns) const
{ return const_cast<XmlElement *>(this)->NextWithNamespace(ns); }
XmlElement * FirstNamed(const QName & name);
const XmlElement * FirstNamed(const QName & name) const
{ return const_cast<XmlElement *>(this)->FirstNamed(name); }
XmlElement * NextNamed(const QName & name);
const XmlElement * NextNamed(const QName & name) const
{ return const_cast<XmlElement *>(this)->NextNamed(name); }
const std::string & TextNamed(const QName & name) const;
void InsertChildAfter(XmlChild * pPredecessor, XmlChild * pNewChild);
void RemoveChildAfter(XmlChild * pPredecessor);
void AddParsedText(const char * buf, int len);
void AddText(const std::string & text);
void AddText(const std::string & text, int depth);
void AddElement(XmlElement * pelChild);
void AddElement(XmlElement * pelChild, int depth);
void AddAttr(const QName & name, const std::string & value);
void AddAttr(const QName & name, const std::string & value, int depth);
void ClearNamedChildren(const QName & name);
void ClearChildren();
static XmlElement * ForStr(const std::string & str);
std::string Str() const;
void Print(std::ostream * pout, std::string xmlns[], int xmlnsCount) const;
protected:
virtual bool IsTextImpl() const;
virtual XmlElement * AsElementImpl() const;
virtual XmlText * AsTextImpl() const;
private:
QName name_;
XmlAttr * pFirstAttr_;
XmlAttr * pLastAttr_;
XmlChild * pFirstChild_;
XmlChild * pLastChild_;
};
}
#endif
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