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// **********************************************************************
//
// Copyright (c) 2003-2008 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
namespace IceUtilInternal
{
using System.Collections;
using System.IO;
using System.Diagnostics;
public class XMLOutput : OutputBase
{
public XMLOutput()
: base()
{
elementStack_ = new Stack();
se_ = false;
text_ = false;
sgml_ = false;
escape_ = false;
}
public XMLOutput(StreamWriter writer)
: base(writer)
{
elementStack_ = new Stack();
se_ = false;
text_ = false;
sgml_ = false;
escape_ = false;
}
public XMLOutput(string s)
: base(s)
{
elementStack_ = new Stack();
se_ = false;
text_ = false;
sgml_ = false;
escape_ = false;
}
virtual public void
setSGML(bool sgml)
{
sgml_ = true;
}
public override void
print(string s)
{
if(se_)
{
out_.Write(">");
se_ = false;
}
text_ = true;
if(escape_)
{
string escaped = escape(s);
base.print(escaped);
}
else
{
base.print(s);
}
}
public virtual XMLOutput
write(string s)
{
print(s);
return this;
}
public override void
nl()
{
if(se_)
{
se_ = false;
out_.Write(">");
}
base.nl();
}
public virtual XMLOutput
se(string element)
{
nl();
//
// If we're not in SGML mode the output of the '>' character is
// deferred until either the end-element (in which case a /> is
// emitted) or until something is displayed.
//
if(escape_)
{
out_.Write('<');
out_.Write(escape(element));
}
else
{
out_.Write('<');
out_.Write(element);
}
se_ = true;
text_ = false;
int pos = element.IndexOf(' ');
if (pos == - 1)
{
pos = element.IndexOf('\t');
}
if (pos == - 1)
{
elementStack_.Push(element);
}
else
{
elementStack_.Push(element.Substring(0, pos - 1));
}
++pos_; // TODO: ???
inc();
separator_ = false;
return this;
}
public virtual XMLOutput
ee()
{
string element = (string)elementStack_.Pop();
dec();
if(se_)
{
//
// SGML (docbook) doesn't support <foo/>
//
if(sgml_)
{
out_.Write("></");
out_.Write(element);
out_.Write(">");
}
else
{
out_.Write("/>");
}
}
else
{
if(!text_)
{
nl();
}
out_.Write("</");
out_.Write(element);
out_.Write(">");
}
--pos_; // TODO: ???
se_ = false;
text_ = false;
return this;
}
public virtual XMLOutput
attr(string name, string val)
{
//
// Precondition: Attributes can only be attached to elements.
//
Debug.Assert(se_);
out_.Write(" ");
out_.Write(name);
out_.Write("=\"");
out_.Write(escape(val));
out_.Write("\"");
return this;
}
public virtual XMLOutput
startEscapes()
{
escape_ = true;
return this;
}
public virtual XMLOutput
endEscapes()
{
escape_ = false;
return this;
}
public virtual string
currentElement()
{
if(elementStack_.Count > 0)
{
return (string)elementStack_.Peek();
}
else
{
return "";
}
}
private string
escape(string input)
{
string v = input;
//
// Find out whether there is a reserved character to avoid
// conversion if not necessary.
//
string allReserved = "<>'\"&";
bool hasReserved = false;
char[] arr = input.ToCharArray();
for(int i = 0; i < arr.Length; i++)
{
if(allReserved.IndexOf((char)arr[i]) != - 1)
{
hasReserved = true;
break;
}
}
if(hasReserved)
{
int index;
//
// First convert all & to &
//
index = v.IndexOf('&');
if(index != - 1)
{
v = v.Insert(index, "amp;");
}
//
// Next convert remaining reserved characters.
//
index = v.IndexOf('>');
if(index != - 1)
{
string tmp = v.Substring(0, index);
tmp += ">";
tmp += v.Substring(index + 1);
v = tmp;
}
index = v.IndexOf('<');
if(index != -1)
{
string tmp = v.Substring(0, index);
tmp += "<";
tmp += v.Substring(index + 1);
v = tmp;
}
index = v.IndexOf('\'');
if(index != -1)
{
string tmp = v.Substring(0, index);
tmp += "'";
tmp += v.Substring(index + 1);
v = tmp;
}
index = v.IndexOf('"');
if(index != -1)
{
string tmp = v.Substring(0, index);
tmp += """;
tmp += v.Substring(index + 1);
}
}
return v;
}
private Stack elementStack_;
internal bool se_;
internal bool text_;
private bool sgml_;
private bool escape_;
}
}
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