// DOM MANIPULATION TO DYNAMICALLY RENDER COMMENTS SCOPES IN TEXT 

// cf. http://www.quirksmode.org/dom/w3c_core.html#nodemanipulation (informative!)

// classes :

// c-s is for 'textnode wrapper span'

// c-c is a comment marker

paintCommentScope = function(comment) {

  if (comment.reply_to_id == null && comment['start_wrapper'] != -1) {

    var selection = {   'start' : { 'elt' : document.getElementById("sv_"+comment['start_wrapper']), 'offset' : comment['start_offset'] },

              'end' : { 'elt' : document.getElementById("sv_"+comment['end_wrapper']), 'offset' : comment['end_offset'] }

            } ;

    if (document.getElementById("sv_"+comment['start_wrapper'])== null) {

      warn_server({'from':'paintCommentScope', 'start_wrapper':comment['start_wrapper']}) ;

    }

    else {

      if (document.getElementById("sv_"+comment['end_wrapper'])== null)

        warn_server({'from':'paintCommentScope', 'end_wrapper':comment['end_wrapper']}) ;

      else {

          selection['start'] = _convertSelectionFromCSToCC(selection['start']) ;

          selection['end'] = _convertSelectionFromCSToCC(selection['end']) ;

          renderComment(selection, comment['id']) ;

      }

    }

  }

};

getCommentIdsFromClasses = function (elt) {

  var commentIds = [] ;

  var classes = elt['className'].split(" ") ;

  for (var i = 0, ilen = classes.length ; i < ilen ; i++) {

    if (classes[i].indexOf('c-id-') == 0) {

      commentIds.push(parseInt(classes[i].substring('c-id-'.length))) ;

    }

  }

  return commentIds ;

};

renderComment = function (selection, commentId) {

  var startOffset = selection['start']['offset'] ;

  var endOffset = selection['end']['offset'] ;

  var startElt = selection['start']['elt'] ;

  var endElt = selection['end']['elt'] ;

    if ((startElt != null) && (endElt != null) && _getTextNodeContent(startElt) != '' && _getTextNodeContent(endElt) != ''){

// log('startElt.id : ' + startElt.id) ;

// log('endElt.id : ' + endElt.id) ;

//      log('startElt.innerHTML : ' + startElt.innerHTML) ;

//      log('endElt.innerHTML : ' + endElt.innerHTML) ;

      markWholeNodesAsComments(startElt, endElt, commentId) ;

      markEndsAsComments(startElt, startOffset, endElt, endOffset, commentId) ;

  }

};

markWholeNodesAsComments = function (startElt, endElt, commentId) {

    var commonAncestor = _findCommonAncestor(startElt, endElt) ;

    _dynSpanToAnc(startElt, commonAncestor, commentId, false) ;

    _dynSpanToAnc(endElt, commonAncestor, commentId, true) ;

    _dynSpanInBetween(commonAncestor, startElt, endElt, commentId) ;

};

_setTextNodeContent = function(txtNodeParent, contentString) {

    CY.DOM.setText(txtNodeParent, contentString);

};

_getTextNodeContent = function(txtNodeParent) {

    return CY.DOM.getText(txtNodeParent);

};

markEndsAsComments = function(startElt, startOffset, endElt, endOffset, commentId) {

//  alert('starting with: ' + startElt.childNodes.length + 'and a length of : ' + startElt.firstChild.data.length) ; 

//  alert('2 and a length of : ' + CY.DOM.getText(startElt).length) ; 

  var beforeStart = _getTextNodeContent(startElt).substring(0, startOffset) ; 

  var afterStart = _getTextNodeContent(startElt).substring(startOffset) ;

  var beforeEnd = _getTextNodeContent(endElt).substring(0, endOffset) ;

  var afterEnd = _getTextNodeContent(endElt).substring(endOffset) ;

    var sameNode = (startElt === endElt) ;

//    log('beforeStart : ' + beforeStart + ' , afterStart : ' + afterStart + ' , beforeEnd : ' + beforeEnd + ' , afterEnd : ' + afterEnd + ' , sameNode : ' + sameNode) ;

    // taking care of start node : (and 'sameNode' case when start and end lie

  // on same node)

    if (afterStart != "") { // otherwise nothing to do on the start node

      if (CY.DOM.hasClass(startElt, 'c-c')) {

        var lastElt = null, afterStartElt = null, afterEndElt = null, beforeStartElt = null ;

          var btw = (sameNode) ? _getTextNodeContent(startElt).substring(startOffset, endOffset) : afterStart ;

          if (sameNode && (afterEnd != "")) {

        afterEndElt = startElt ;

        lastElt = afterEndElt ;

      }

        if (btw != "") {

          if (lastElt == null) {

            afterStartElt = startElt ;

          }

          else {

            afterStartElt = _yuiCloneNode(startElt) ;

            lastElt.parentNode.insertBefore(afterStartElt, lastElt) ;

          }

        lastElt = afterStartElt ;

        }

        if (beforeStart != "") {

          if (lastElt == null) {

            beforeStartElt = startElt ;

          }

          else {

            beforeStartElt = _yuiCloneNode(startElt) ;

            lastElt.parentNode.insertBefore(beforeStartElt, lastElt) ;

          }

        lastElt = beforeStartElt ;

        }

      if (afterEndElt != null) {

        _setTextNodeContent(afterEndElt, afterEnd) ;

      }

        if (afterStartElt != null) {

        _setTextNodeContent(afterStartElt, btw) ;

          _addIdClass(afterStartElt, commentId) ;

        }

//        alert('beforeStartElt.firstChild.data.length: ' + beforeStartElt.firstChild.data.length);

//        alert('beforeStartElt.childNodes.length: ' + beforeStartElt.childNodes.length);

        if (beforeStartElt != null) {

        _setTextNodeContent(beforeStartElt, beforeStart) ; 

        }

//        alert('beforeStartElt.childNodes.length: ' + beforeStartElt.childNodes.length);

        //alert('typeof beforeStartElt: ' + typeof beforeStartElt);

//        alert('beforeStartElt.lastChild ==  beforeStartElt.firstChild : ' + (beforeStartElt.lastChild == beforeStartElt.firstChild));

//        alert('beforeStartElt.firstChild.id : ' + beforeStartElt.firstChild.id);

//        alert('beforeStartElt.lastChild.data : ' + beforeStartElt.lastChild.data);

//        alert('beforeStartElt.firstChild.data : ' + beforeStartElt.firstChild.data);

//        alert('afterStartElt.firstChild.data : ' + afterStartElt.firstChild.data);

//        alert('afterEndElt.firstChild.data : ' + afterEndElt.firstChild.data);

        }

    }

    if ( ( !sameNode ) && ( beforeEnd != "" ) ) { // otherwise nothing to do

                          // on the end node

      if (CY.DOM.hasClass(endElt, 'c-c')) {

        var lastElt = null, beforeEndElt = null, afterEndElt = null ;

        if (afterEnd != "") {

          afterEndElt = endElt ;

        lastElt = endElt ;

      }

        if (beforeEnd != "") {

          if (lastElt == null)

            beforeEndElt = endElt ;

          else {

            beforeEndElt = _yuiCloneNode(endElt) ;

            lastElt.parentNode.insertBefore(beforeEndElt, lastElt) ;

          }

        lastElt = beforeEndElt ;

        }

        if (afterEndElt != null) {

          _setTextNodeContent(afterEndElt, afterEnd) ;

      }

        if (beforeEndElt != null) {

          _addIdClass(beforeEndElt, commentId) ;

          _setTextNodeContent(beforeEndElt, beforeEnd) ;

        }

      }

    }

};

// WARNING (200891108): had to use YUI cloneNode instead of the native cloneNode

// (because of the _yuid that is cloned under IE, cf tests made in textYUIcloneNode.html)

// so code like :

// afterStartElt = startElt.cloneNode(true) ;

// afterStartElt.id = CY.guid() ;

// was replaced with :

// afterStartElt = _yuiCloneNode(startElt) ;

_yuiCloneNode = function (srcElt) {

  ret.id = CY.guid();

  return ret ;

};

// will wrap textNodes into c-c spans going up the DOM tree from elt to ancestor

// textNodes impacted here will be those that are :

// the same generation or older than elt (but elt is excluded)

// AND not older than grand children of to

// assumption :

// 1 ancestor is an ancestor of elt (we'll be going up the DOM tree)

// 2 elt is a textNode.

// argumentss :

// prev : will spannify previous siblings if true, next siblings otherwise

_dynSpanToAnc = function (elt, ancestor, commentId, prev) {

// log('in : _dynSpanToAnc, elt : ' + elt.id) ;

  var c = elt ;

    while ((c != null) && (c !== ancestor) && (c.parentNode !== ancestor)) {

    var c_sib = null ;

    if (prev) {

      c_sib = c.previousSibling ;

    }

    else {

      c_sib = c.nextSibling ;

    }

    if (c_sib == null) {

      c = c.parentNode ;

    }

    else {

      c = c_sib ;     

      _recAddComment(c, commentId) ;

    }

  } ;

};

// between elt1 and elt2 (which are excluded)

_dynSpanInBetween = function (anc, elt1, elt2, commentId) {

  var a = elt1 ;

  var elt1Anc = null ;

    while (a) {

        if (a.parentNode === anc) {

          elt1Anc = a ;

          break;

        }

        a = a.parentNode;

    }

  if (elt1Anc != null) {

    a = elt2 ;

    var elt2Anc = null ;

      while (a) {

          if (a.parentNode === anc) {

            elt2Anc = a ;

            break;

          }

          a = a.parentNode;

      }

    if (elt2Anc != null) { // found both ancestor, now doing the work

      a = elt1Anc.nextSibling ;

      while ((a != null) && (a !== elt2Anc)) {

        _recAddComment(a, commentId) ;

        a = a.nextSibling ;

      }

    }

  }

};

// (copied from YUI dom-base)

_bruteContains = function(element, needle) {

    while (needle) {

        if (element === needle) {

            return true;

        }

        needle = needle.parentNode;

    }

    return false;

};

//elt is supposed to be c-c classed

_addIdClass = function (elt, commentId) {

  CY.DOM.addClass(elt, 'c-id-' + commentId) ;

  var block_elt = _findParentBlockElt(elt);

  if (block_elt != null) {

    _unpaintCategories(block_elt);

    _repaintCategories(elt, block_elt);

  }

  _updateCommentCounter(elt) ;

};

//elt is supposed to be c-c classed

_removeIdClass = function (elt, commentId) {

  CY.DOM.removeClass(elt, 'c-id-' + commentId) ;

  var block_elt = _findParentBlockElt(elt);

  if (block_elt != null) {

    _unpaintCategories(block_elt);

    _repaintCategories(elt, block_elt, commentId);

  }

  _updateCommentCounter(elt) ;

};

//elt is supposed to be c-c classed

_removeIdClasses = function (elt) {

  var re = _cgetRegExp('(?:^|\\s+)c-id-(?:\\d+)', 'g');

  elt['className'] = elt['className'].replace(re, " ") ;

  _updateCommentCounter(elt) ;

  var block_elt = _findParentBlockElt(elt);

  if (block_elt != null) {

    _unpaintCategories(block_elt);

  }

};

// Finds the closest parent of an element which is a block.

_findParentBlockElt = function(elt) {

  var block_elt = elt;

  var block_elt_style = block_elt.currentStyle || window.getComputedStyle(block_elt, ""); 

  var block_elt_display = block_elt_style.display;

  while (block_elt != null && block_elt_display != 'block') {

    block_elt = block_elt.parentElement;

    block_elt_style = block_elt.currentStyle || window.getComputedStyle(block_elt, ""); 

    block_elt_display = block_elt_style.display;

  }

  return block_elt;

};

// Removes all vertical bars from a block element.

_unpaintCategories = function(block_elt) {

  CY.DOM.removeClass(block_elt, 'cat1');

  CY.DOM.removeClass(block_elt, 'cat2');

  CY.DOM.removeClass(block_elt, 'cat3');

  CY.DOM.removeClass(block_elt, 'cat4');

  CY.DOM.removeClass(block_elt, 'cat5');

};

// Paints all vertical bars of a block element but the one for commentId if not null.

_repaintCategories = function(elt, block_elt, commentId) {

  // Loop through all comments in this wrapper id

  var wrapper_id = parseInt(getWrapperAncestor(elt).id.substr(3));

  var len = gDb.comments.length;

  for (var i=0; i<len; i++) {

    if (i in gDb.comments) {

      var comment = gDb.comments[i];

      if ((commentId == null || comment.id != commentId) && comment.start_wrapper <= wrapper_id && comment.end_wrapper >= wrapper_id) {

        if (comment.category) {

          CY.DOM.addClass(block_elt, 'cat' + comment.category);

        }

      }

    }

  }

};