// Copyright 2005 Google Inc.

// All Rights Reserved

//

// Miscellania that support the ajaxslt implementation.

//

// Author: Steffen Meschkat <mesch@google.com>

//



function el(i) {

  return document.getElementById(i);

}



function px(x) {

  return x + 'px';

}



// Split a string s at all occurrences of character c. This is like

// the split() method of the string object, but IE omits empty

// strings, which violates the invariant (s.split(x).join(x) == s).

function stringSplit(s, c) {

  var a = s.indexOf(c);

  if (a == -1) {

    return [ s ];

  }

  

  var parts = [];

  parts.push(s.substr(0,a));

  while (a != -1) {

    var a1 = s.indexOf(c, a + 1);

    if (a1 != -1) {

      parts.push(s.substr(a + 1, a1 - a - 1));

    } else {

      parts.push(s.substr(a + 1));

    } 

    a = a1;

  }



  return parts;

}



// Returns the text value if a node; for nodes without children this

// is the nodeValue, for nodes with children this is the concatenation

// of the value of all children.

function xmlValue(node) {

  if (!node) {

    return '';

  }



  var ret = '';

  if (node.nodeType == DOM_TEXT_NODE ||

      node.nodeType == DOM_CDATA_SECTION_NODE ||

      node.nodeType == DOM_ATTRIBUTE_NODE) {

    ret += node.nodeValue;



  } else if (node.nodeType == DOM_ELEMENT_NODE ||

             node.nodeType == DOM_DOCUMENT_NODE ||

             node.nodeType == DOM_DOCUMENT_FRAGMENT_NODE) {

    for (var i = 0; i < node.childNodes.length; ++i) {

      ret += arguments.callee(node.childNodes[i]);

    }

  }

  return ret;

}



// Returns the representation of a node as XML text.

function xmlText(node) {

  var ret = '';

  if (node.nodeType == DOM_TEXT_NODE) {

    ret += xmlEscapeText(node.nodeValue);

    

  } else if (node.nodeType == DOM_ELEMENT_NODE) {

    ret += '<' + node.nodeName;

    for (var i = 0; i < node.attributes.length; ++i) {

      var a = node.attributes[i];

      if (a && a.nodeName && a.nodeValue) {

        ret += ' ' + a.nodeName;

        ret += '="' + xmlEscapeAttr(a.nodeValue) + '"';

      }

    }



    if (node.childNodes.length == 0) {

      ret += '/>';



    } else {

      ret += '>';

      for (var i = 0; i < node.childNodes.length; ++i) {

        ret += arguments.callee(node.childNodes[i]);

      }

      ret += '</' + node.nodeName + '>';

    }

    

  } else if (node.nodeType == DOM_DOCUMENT_NODE || 

             node.nodeType == DOM_DOCUMENT_FRAGMENT_NODE) {

    for (var i = 0; i < node.childNodes.length; ++i) {

      ret += arguments.callee(node.childNodes[i]);

    }

  }

  

  return ret;

}



// Applies the given function to each element of the array.

function mapExec(array, func) {

  for (var i = 0; i < array.length; ++i) {

    func(array[i]);

  }

}



// Returns an array that contains the return value of the given

// function applied to every element of the input array.

function mapExpr(array, func) {

  var ret = [];

  for (var i = 0; i < array.length; ++i) {

    ret.push(func(array[i]));

  }

  return ret;

};



// Reverses the given array in place.

function reverseInplace(array) {

  for (var i = 0; i < array.length / 2; ++i) {

    var h = array[i];

    var ii = array.length - i - 1;

    array[i] = array[ii];

    array[ii] = h;

  }

}



// Shallow-copies an array.

function copyArray(dst, src) { 

  for (var i = 0; i < src.length; ++i) {

    dst.push(src[i]);

  }

}



function assert(b) {

  if (!b) {

    throw 'assertion failed';

  }

}



// Based on

// <http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247>

var DOM_ELEMENT_NODE = 1;

var DOM_ATTRIBUTE_NODE = 2;

var DOM_TEXT_NODE = 3;

var DOM_CDATA_SECTION_NODE = 4;

var DOM_ENTITY_REFERENCE_NODE = 5;

var DOM_ENTITY_NODE = 6;

var DOM_PROCESSING_INSTRUCTION_NODE = 7;

var DOM_COMMENT_NODE = 8;

var DOM_DOCUMENT_NODE = 9;

var DOM_DOCUMENT_TYPE_NODE = 10;

var DOM_DOCUMENT_FRAGMENT_NODE = 11;

var DOM_NOTATION_NODE = 12;





var xpathdebug = false; // trace xpath parsing

var xsltdebug = false; // trace xslt processing





// Escape XML special markup chracters: tag delimiter < > and entity

// reference start delimiter &. The escaped string can be used in XML

// text portions (i.e. between tags).

function xmlEscapeText(s) {

  return s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');

}



// Escape XML special markup characters: tag delimiter < > entity

// reference start delimiter & and quotes ". The escaped string can be

// used in double quoted XML attribute value portions (i.e. in

// attributes within start tags).

function xmlEscapeAttr(s) {

  return xmlEscapeText(s).replace(/\"/g, '&quot;');

}



// Escape markup in XML text, but don't touch entity references. The

// escaped string can be used as XML text (i.e. between tags).

function xmlEscapeTags(s) {

  return s.replace(/</g, '&lt;').replace(/>/g, '&gt;');

}



// An implementation of the debug log. 



var logging__ = true;



function Log() {};



Log.lines = [];



Log.write = function(s) {

  if (logging__) {

    this.lines.push(xmlEscapeText(s));

    this.show();

  }

};



// Writes the given XML with every tag on a new line.

Log.writeXML = function(xml) {

  if (logging__) {

    var s0 = xml.replace(/</g, '\n<');

    var s1 = xmlEscapeText(s0);

    var s2 = s1.replace(/\s*\n(\s|\n)*/g, '<br/>');

    this.lines.push(s2);

    this.show();

  }

}



// Writes without any escaping

Log.writeRaw = function(s) {

  if (logging__) {

    this.lines.push(s);

    this.show();

  }

}



Log.clear = function() {

  if (logging__) {

    var l = this.div();

    l.innerHTML = '';

    this.lines = [];

  }

}



Log.show = function() {

  var l = this.div();

  l.innerHTML += this.lines.join('<br/>') + '<br/>';

  this.lines = [];

  l.scrollTop = l.scrollHeight;

}



Log.div = function() {

  var l = document.getElementById('log');

  if (!l) {

    l = document.createElement('div');

    l.id = 'log';

    l.style.position = 'absolute';

    l.style.right = '5px';

    l.style.top = '5px';

    l.style.width = '250px';

    l.style.height = '150px';

    l.style.overflow = 'auto';

    l.style.backgroundColor = '#f0f0f0';

    l.style.border = '1px solid gray';

    l.style.fontSize = '10px';

    l.style.padding = '5px';

    document.body.appendChild(l);

  }

  return l;

}





function Timer() {}

Timer.start = function() {}

Timer.end = function() {}