/usr/include/CLAM/XmlWriteContext.hxx is in libclam-dev 1.4.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __XMLWRITECONTEXT_HXX__
#define __XMLWRITECONTEXT_HXX__
#include <ostream>
#include <string>
#include "Assert.hxx"
namespace CLAM
{
/**
* This class provides primitives to write an XML document to a target
* stream and to keep track of the writting state.
* You can only have an instance of that class at a time.
* Instances of this class are created normally by as members of a
* root Scoped object like XmlDocument or XmlFragment.
* You can also instanciate this class directly whenever you want
* to use its primitives without intermediates.
* @todo Indentation
* @todo Explicit namespaces (now are supported by hand)
* @todo Checks on element levels
*/
class XmlWriteContext
{
public:
XmlWriteContext(std::ostream & targetStream) :
mTarget(targetStream)
{
CLAM_ASSERT(!sCurrentContext,
"An XML generation context is already defined");
sCurrentContext = this;
mLastWasAContent=false;
mElementInserted=false;
mTagOpened=false;
mCurrentLevel = 0;
mUseIndentation=false;
}
~XmlWriteContext()
{
sCurrentContext = 0;
}
static XmlWriteContext & CurrentContext()
{
CLAM_ASSERT(sCurrentContext,"XML generation context not created");
return *sCurrentContext;
}
std::ostream & GetTarget()
{
return mTarget;
}
template <typename T>
void InsertContent(const T & content)
{
if (mTagOpened) EndOpenTag();
if (mElementInserted)
NewIndentedLineIfEnabled();
mTarget << content;
mLastWasAContent = true;
}
void OpenElement(const std::string & name)
{
if (mTagOpened) EndOpenTag();
NewIndentedLineIfEnabled();
// TODO: Change the temporary to normal insertion with the upgrade to 0.5.2
mTarget << std::string("<") << name;
mTagOpened = true;
mElementInserted = false;
mLastWasAContent = false;
mCurrentLevel++;
}
void CloseElement(const std::string & name)
{
mCurrentLevel--;
if (mLastWasAContent || mElementInserted)
CloseFullElement(name);
else
CloseEmptyElement();
mElementInserted = true;
mLastWasAContent = false;
}
template <typename T>
void InsertAttribute(const std::string &name, const T & content)
{
CLAM_ASSERT(mTagOpened, "Appending attribute outside a tag");
mTarget << std::string(" ") << name << std::string("='")
<< content << std::string("'");
}
/**
* @return true when the last thing inserted on the current node
* has been plain content.
*/
bool LastWasAContent()
{
return mLastWasAContent;
}
/**
* @return true when an element has been inserted on the current node.
*/
bool ElementInserted()
{
return mElementInserted;
}
unsigned int CurrentLevel()
{
return mCurrentLevel;
}
void UseIndentation(bool useIt)
{
mUseIndentation = useIt;
}
private:
void CloseFullElement(const std::string & name)
{
if (mElementInserted)
NewIndentedLineIfEnabled();
// TODO: Change the temporary to normal insertion with the upgrade to 0.5.2
mTarget << std::string("</") << name << std::string(">");
}
void CloseEmptyElement()
{
CLAM_ASSERT(mTagOpened,"No open tag to close");
// TODO: Change the temporary to normal insertion with the upgrade to 0.5.2
mTarget << std::string(" />");
mTagOpened = false;
}
void EndOpenTag()
{
CLAM_ASSERT(mTagOpened,"No open tag to close");
// TODO: Change the temporary to normal insertion with the upgrade to 0.5.2
mTarget << std::string(">");
mTagOpened = false;
}
void NewIndentedLineIfEnabled()
{
if (!mUseIndentation) return;
// TODO: Change the temporary to normal insertion with the upgrade to 0.5.2
if (mCurrentLevel!=0 || mLastWasAContent || mElementInserted)
mTarget << std::string("\n");
mTarget << std::string(mCurrentLevel,'\t');
}
private:
std::ostream & mTarget;
bool mLastWasAContent;
bool mElementInserted;
bool mTagOpened;
bool mUseIndentation;
unsigned int mCurrentLevel;
static XmlWriteContext * sCurrentContext;
};
} // ns CLAM
#endif//__XMLWRITECONTEXT_HXX__
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