/**
 * Some of these scripts were taken from wikipedia.org and were modified for DokuWiki then modified a little bit more for citynoise.org chamone!
 */

/**
 * Some browser detection
 */
var clientPC  = navigator.userAgent.toLowerCase(); // Get client info
var is_gecko  = ((clientPC.indexOf('gecko')!=-1) && (clientPC.indexOf('spoofer')==-1)
                && (clientPC.indexOf('khtml') == -1) && (clientPC.indexOf('netscape/7.0')==-1));
var is_safari = ((clientPC.indexOf('AppleWebKit')!=-1) && (clientPC.indexOf('spoofer')==-1));
var is_khtml  = (navigator.vendor == 'KDE' || ( document.childNodes && !document.all && !navigator.taintEnabled ));
if (clientPC.indexOf('opera')!=-1) {
    var is_opera = true;
    var is_opera_preseven = (window.opera && !document.childNodes);
    var is_opera_seven = (window.opera && document.childNodes);
}

/*
 * Insert the given value at the current cursor position
 *
 * @see http://www.alexking.org/index.php?content=software/javascript/content.php
 */
function insertAtCarret(field,value){
  //IE support
  if (document.selection) {
    field.focus();
    if(opener == null){
      sel = document.selection.createRange();
    }else{
      sel = opener.document.selection.createRange();
    }
    sel.text = value;
  //MOZILLA/NETSCAPE support
  }else if (field.selectionStart || field.selectionStart == '0') {
    var startPos  = field.selectionStart;
    var endPos    = field.selectionEnd;
    var scrollTop = field.scrollTop;
    field.value = field.value.substring(0, startPos)
                  + value
                  + field.value.substring(endPos, field.value.length);

    field.focus();
    var cPos=startPos+(value.length);
    field.selectionStart=cPos;
    field.selectionEnd=cPos;
    field.scrollTop=scrollTop;
  } else {
    field.value += "\n"+value;
  }
  // reposition cursor if possible
  if (field.createTextRange) field.caretPos = document.selection.createRange().duplicate();
}


function insertImgTag(file){
  insertAtCarret(opener.document.post.ArticleText,'[[img:'+file+']]\n\n');
  window.close(); 
}


/**
 * apply tagOpen/tagClose to selection in textarea, use sampleText instead
 * of selection if there is none copied and adapted from phpBB
 */
function insertTags(tagOpen, tagClose, sampleText) {
  var txtarea = document.post.ArticleText;
  // IE
  if(document.selection  && !is_gecko) {
    var theSelection = document.selection.createRange().text;
    if(!theSelection) { theSelection=sampleText;}
    txtarea.focus();
    if(theSelection.charAt(theSelection.length - 1) == " "){// exclude ending space char, if any
      theSelection = theSelection.substring(0, theSelection.length - 1);
      document.selection.createRange().text = tagOpen + theSelection + tagClose + " ";
    } else {
      document.selection.createRange().text = tagOpen + theSelection + tagClose;
    }
  // Mozilla
  } else if(txtarea.selectionStart || txtarea.selectionStart == '0') {
     var startPos = txtarea.selectionStart;
    var endPos = txtarea.selectionEnd;
    var scrollTop=txtarea.scrollTop;
    var myText = (txtarea.value).substring(startPos, endPos);
    if(!myText) { myText=sampleText;}
    if(myText.charAt(myText.length - 1) == " "){ // exclude ending space char, if any
      subst = tagOpen + myText.substring(0, (myText.length - 1)) + tagClose + " ";
    } else {
      subst = tagOpen + myText + tagClose;
    }
    txtarea.value = txtarea.value.substring(0, startPos) + subst +
    txtarea.value.substring(endPos, txtarea.value.length);
    txtarea.focus();

    var cPos=startPos+(tagOpen.length+myText.length+tagClose.length);
    txtarea.selectionStart=cPos;
    txtarea.selectionEnd=cPos;
    txtarea.scrollTop=scrollTop;

  // All others
  } else {
    var copy_alertText=alertText;
    var re1=new RegExp("\\$1","g");
    var re2=new RegExp("\\$2","g");
    copy_alertText=copy_alertText.replace(re1,sampleText);
    copy_alertText=copy_alertText.replace(re2,tagOpen+sampleText+tagClose);
    var text;
    if (sampleText) {
      text=prompt(copy_alertText);
    } else {
      text="";
    }
    if(!text) { text=sampleText;}
    text=tagOpen+text+tagClose;
    //append to the end
    txtarea.value += "\n"+text;

    // in Safari this causes scrolling
    if(!is_safari) {
      txtarea.focus();
    }

  }
  // reposition cursor if possible
  if (txtarea.createTextRange) txtarea.caretPos = document.selection.createRange().duplicate();
}