// vim: set filetype=javascript

function getPosition(e) {
  var left = 0;
  var top  = 0;

  while (e.offsetParent){
    left += e.offsetLeft;
    top  += e.offsetTop;
    e     = e.offsetParent;
  }

  left += e.offsetLeft;
  top  += e.offsetTop;

  return {x:left, y:top};
}

function link(id, url) {
    var xmlHttpReq = false;
    var self = this;

    if (window.XMLHttpRequest) { // Mozilla/Safari
        self.xmlHttpReq = new XMLHttpRequest();
    } else if (window.ActiveXObject) { // IE
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
        return true;
    }
    var throbber = document.getElementById('throbber');
    if (throbber) {
        throbber.style.display = 'inline';
    }
    var to_blur = document.getElementById('to_blur');
    var class_to_blur;
    if (to_blur) {
        class_to_blur = to_blur.className;
        to_blur.className = class_to_blur+' blured';
    }

    self.xmlHttpReq.open('POST', url, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            document.getElementById(id).innerHTML = self.xmlHttpReq.responseText;
            if (throbber) {
                throbber.style.display = 'none';
            }
            if (to_blur) {
                to_blur.className = class_to_blur;
            }
        }
    }
    self.xmlHttpReq.send('');
    return false;
}

function request () {
  var req;
  if (window.XMLHttpRequest) {
    try {
      req = new XMLHttpRequest();
    } catch(e) {
      req = null;
    }
  } else if(window.ActiveXObject) {
    try {
      req = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      try {
	req = new ActiveXObject("Microsoft.XMLHTTP");
      } catch(e) {
	req = null;
      }
    }
  }
  return req;
}

function AjaxRequest() {
  var req = request();
  this.loadXMLDoc = function(id, url, throbber_id, visibility, focus) {
    var throbber = document.getElementById(throbber_id);
    if (throbber) {
      if (visibility == 'visibility') {
	throbber.style.visibility = 'visible';
      } else {
	throbber.style.display = 'inline';
      }
    }
    req.open('POST', url, true);
    req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    req.onreadystatechange = function() {
      if (req.readyState == 4) {
        if (id) {
            document.getElementById(id).innerHTML = req.responseText;
        }
	if (throbber) {
	  if (visibility == 'visibility') {
	    throbber.style.visibility = 'hidden';
	  } else {
	    throbber.style.display = 'none';
	  }
	}
	if (focus != '') {
	  var elt = document.getElementById(focus);
	  if (elt) elt.focus();
	}
      }
    }
    req.send('');
    return false;
  }
}

function link2(id, url, throbber_id, focus) {
    var req = new AjaxRequest();
    req.loadXMLDoc(id, url, throbber_id, '', focus);
    return true;
}

function create_fader () {
  var fade = document.createElement('div');
  fade.className = 'fade';
  return fade;
}

function create_throbber() {
  var div = document.createElement('div');
  var head = document.createElement('h1');
  var img;
  img = document.createElement('img');
  img.className = 'throbber';
  img.src   = '/FFE/img/throbber.gif';
  head.appendChild(img);
  img = document.createElement('img');
  img.className = 'close';
  img.src   = '/FFE/img/button-close.png';
  head.appendChild(img);
  div.appendChild(head);
  div.appendChild(document.createTextNode('Veuillez patienter...'));
  div.style.opacity = 0.7;
  return div;
}

function find_fader (e) {
  var f = e.previousSibling;
  while (f) {
    if (f.tagName && f.tagName == 'DIV' && f.className == 'fade') {
      return f;
    }
    f = f.previousSibling;
  }
  return f;
}

function AjaxRequestPopup() {
  var req = request();
  if (!req) return false;
  this.loadXMLDoc = function(id, url, pos_id) {
    var e = document.getElementById(id);
    var f = find_fader(e);
    if (f) {
      f.style.visibility = 'visible';
    }
    e.innerHTML = null;
    var pos = getPosition(document.getElementById(pos_id));
    e.style.left = pos.x + 'px';
    e.style.top  = pos.y + 'px';
    e.appendChild(create_throbber());
    e.style.visibility = 'visible';
    req.open('POST', url, true);
    req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    req.onreadystatechange = function() {
      if (req.readyState == 4) {
	e.innerHTML = req.responseText;
      }
    }
    req.send('');
    return false;
  }
}

function popup(id, url, pos_id) {
    var req = new AjaxRequestPopup();
    req.loadXMLDoc(id, url, pos_id);
    return false;
}

function popup_close(id) {
  var e = document.getElementById(id);
  if (e) {
    var f = find_fader(e);
    e.style.visibility = 'hidden';
    if (f) {
      f.style.visibility = 'hidden';
    }
  }
  return false;
}

function no_enter(ev) {
  if (!ev)
    ev=window.event;
  if (ev.keyCode==13) {
    return false;
  }
  return true;
}

function next_elt(id, ev, idnext) {
  if (!ev)
    ev=window.event;
  if (ev.keyCode==13) {
    nextInput = document.getElementById(idnext);
    if (nextInput) {
      id.blur();
      nextInput.focus();
    } else {
      id.blur();
    }
    return false;
  }
  return true;
}

function next_or_popup(id, ev, idnext, idtarget, url, idpos) {
  if (!ev)
    ev=window.event;
  if (ev.keyCode==13) {
    if (url) {
      popup(idtarget, url, idpos);
    } else {
      nextInput = document.getElementById(idnext);
      if (nextInput) {
	id.blur();
	nextInput.focus();
      } else {
	id.blur();
      }
    }
    return false;
  } else {
    return true;
  }
}