util.js

反ajax原代码

      return;
    }
    for (var prop in data) {
      value = dwr.util._getValueFrom(data[prop], arguments[2]);
      text = dwr.util._getValueFrom(data[prop], arguments[3]);

      if (text || value) ele.options[ele.options.length] = new Option(text, value);
    }
  }
  else {
    if (!useOptions) {
      dwr.util._debug("dwr.util.addOptions can only create select lists from objects.");
      return;
    }
    for (var prop in data) {
      if (typeof data[prop] != "function") {
        if (arguments[2]) ele.options[ele.options.length] = new Option(prop, data[prop]);
        else ele.options[ele.options.length] = new Option(data[prop], prop);
      }
    }
  }

  // All error routes through this function result in a return, so highlight now
  dwr.util.highlight(ele, null); // TODO: forward options instead of null 
};

/**
 * @private Get the data from an array function for dwr.util.addOptions
 */
dwr.util._getValueFrom = function(data, method) {
  if (method == null) return data;
  else if (typeof method == 'function') return method(data);
  else return data[method];
};

/**
 * Remove all the options from a select list (specified by id)
 * @see http://getahead.ltd.uk/dwr/browser/lists
 */
dwr.util.removeAllOptions = function(ele) {
  ele = dwr.util._getElementById(ele, "removeAllOptions()");
  if (ele == null) return;
  var useOptions = dwr.util._isHTMLElement(ele, "select");
  var useLi = dwr.util._isHTMLElement(ele, ["ul", "ol"]);
  if (!useOptions && !useLi) {
    dwr.util._debug("removeAllOptions() can only be used with select, ol and ul elements. Attempt to use: " + dwr.util._detailedTypeOf(ele));
    return;
  }
  if (useOptions) {
    ele.options.length = 0;
  }
  else {
    while (ele.childNodes.length > 0) {
      ele.removeChild(ele.firstChild);
    }
  }
};

/**
 * Create rows inside a the table, tbody, thead or tfoot element (given by id).
 * @see http://getahead.ltd.uk/dwr/browser/tables
 */
dwr.util.addRows = function(ele, data, cellFuncs, options) {
  ele = dwr.util._getElementById(ele, "addRows()");
  if (ele == null) return;
  if (!dwr.util._isHTMLElement(ele, ["table", "tbody", "thead", "tfoot"])) {
    dwr.util._debug("addRows() can only be used with table, tbody, thead and tfoot elements. Attempt to use: " + dwr.util._detailedTypeOf(ele));
    return;
  }
  if (!options) options = {};
  if (!options.rowCreator) options.rowCreator = dwr.util._defaultRowCreator;
  if (!options.cellCreator) options.cellCreator = dwr.util._defaultCellCreator;
  var tr, rowNum;
  if (dwr.util._isArray(data)) {
    for (rowNum = 0; rowNum < data.length; rowNum++) {
      options.rowData = data[rowNum];
      options.rowIndex = rowNum;
      options.rowNum = rowNum;
      options.data = null;
      options.cellNum = -1;
      tr = dwr.util._addRowInner(cellFuncs, options);
      if (tr != null) ele.appendChild(tr);
    }
  }
  else if (typeof data == "object") {
    rowNum = 0;
    for (var rowIndex in data) {
      options.rowData = data[rowIndex];
      options.rowIndex = rowIndex;
      options.rowNum = rowNum;
      options.data = null;
      options.cellNum = -1;
      tr = dwr.util._addRowInner(cellFuncs, options);
      if (tr != null) ele.appendChild(tr);
      rowNum++;
    }
  }

  dwr.util.highlight(ele, options);
};

/**
 * @private Internal function to draw a single row of a table.
 */
dwr.util._addRowInner = function(cellFuncs, options) {
  var tr = options.rowCreator(options);
  if (tr == null) return null;
  for (var cellNum = 0; cellNum < cellFuncs.length; cellNum++) {
    var func = cellFuncs[cellNum];
    if (typeof func == 'function') options.data = func(options.rowData, options);
    else options.data = func || "";
    options.cellNum = cellNum;
    var td = options.cellCreator(options);
    if (td != null) {
      if (options.data != null) {
        if (dwr.util._isHTMLElement(options.data)) td.appendChild(options.data);
        else {
          if (dwr.util._shouldEscapeHtml(options) && typeof(options.data) == "string") {
            td.innerHTML = dwr.util.escapeHtml(options.data);
          }
          else {
            td.innerHTML = options.data;
          }
        }
      }
      tr.appendChild(td);
    }
  }
  return tr;
};

/**
 * @private Default row creation function
 */
dwr.util._defaultRowCreator = function(options) {
  return document.createElement("tr");
};

/**
 * @private Default cell creation function
 */
dwr.util._defaultCellCreator = function(options) {
  return document.createElement("td");
};

/**
 * Remove all the children of a given node.
 * @see http://getahead.ltd.uk/dwr/browser/tables
 */
dwr.util.removeAllRows = function(ele, options) {
  ele = dwr.util._getElementById(ele, "removeAllRows()");
  if (ele == null) return;
  if (!options) options = {};
  if (!options.filter) options.filter = function() { return true; };
  if (!dwr.util._isHTMLElement(ele, ["table", "tbody", "thead", "tfoot"])) {
    dwr.util._debug("removeAllRows() can only be used with table, tbody, thead and tfoot elements. Attempt to use: " + dwr.util._detailedTypeOf(ele));
    return;
  }
  var child = ele.firstChild;
  var next;
  while (child != null) {
    next = child.nextSibling;
    if (options.filter(child)) {
      ele.removeChild(child);
    }
    child = next;
  }
};

/**
 * dwr.util.byId(ele).className = "X", that we can call from Java easily.
 */
dwr.util.setClassName = function(ele, className) {
  ele = dwr.util._getElementById(ele, "setClassName()");
  if (ele == null) return;
  ele.className = className;
};

/**
 * dwr.util.byId(ele).className += "X", that we can call from Java easily.
 */
dwr.util.addClassName = function(ele, className) {
  ele = dwr.util._getElementById(ele, "addClassName()");
  if (ele == null) return;
  ele.className += " " + className;
};

/**
 * dwr.util.byId(ele).className -= "X", that we can call from Java easily
 * From code originally by Gavin Kistner
 */
dwr.util.removeClassName = function(ele, className) {
  ele = dwr.util._getElementById(ele, "removeClassName()");
  if (ele == null) return;
  var regex = new RegExp("(^|\\s)" + className + "(\\s|$)", 'g');
  ele.className = ele.className.replace(regex, '');
};

/**
 * dwr.util.byId(ele).className |= "X", that we can call from Java easily.
 */
dwr.util.toggleClassName = function(ele, className) {
  ele = dwr.util._getElementById(ele, "toggleClassName()");
  if (ele == null) return;
  var regex = new RegExp("(^|\\s)" + className + "(\\s|$)");
  if (regex.test(element.className)) {
    ele.className = ele.className.replace(regex, '');
  }
  else {
    ele.className += " " + className;
  }
};

/**
 * Clone a node and insert it into the document just above the 'template' node
 * @see http://getahead.ltd.uk/dwr/???
 */
dwr.util.cloneNode = function(ele, options) {
  ele = dwr.util._getElementById(ele, "cloneNode()");
  if (ele == null) return null;
  if (options == null) options = {};
  var clone = ele.cloneNode(true);
  if (options.idPrefix || options.idSuffix) {
    dwr.util._updateIds(clone, options);
  }
  else {
    dwr.util._removeIds(clone);
  }
  ele.parentNode.insertBefore(clone, ele);
  return clone;
};

/**
 * @private Update all of the ids in an element tree
 */
dwr.util._updateIds = function(ele, options) {
  if (options == null) options = {};
  if (ele.id) {
    ele.setAttribute("id", (options.idPrefix || "") + ele.id + (options.idSuffix || ""));
  }
  var children = ele.childNodes;
  for (var i = 0; i < children.length; i++) {
    var child = children.item(i);
    if (child.nodeType == 1 /*Node.ELEMENT_NODE*/) {
      dwr.util._updateIds(child, options);
    }
  }
};

/**
 * @private Remove all the Ids from an element
 */
dwr.util._removeIds = function(ele) {
  if (ele.id) ele.removeAttribute("id");
  var children = ele.childNodes;
  for (var i = 0; i < children.length; i++) {
    var child = children.item(i);
    if (child.nodeType == 1 /*Node.ELEMENT_NODE*/) {
      dwr.util._removeIds(child);
    }
  }
};

/**
 * @private Helper to turn a string into an element with an error message
 */
dwr.util._getElementById = function(ele, source) {
  var orig = ele;
  ele = dwr.util.byId(ele);
  if (ele == null) {
    dwr.util._debug(source + " can't find an element with id: " + orig + ".");
  }
  return ele;
};

/**
 * @private Is the given node an HTML element (optionally of a given type)?
 * @param ele The element to test
 * @param nodeName eg "input", "textarea" - check for node name (optional)
 *         if nodeName is an array then check all for a match.
 */
dwr.util._isHTMLElement = function(ele, nodeName) {
  if (ele == null || typeof ele != "object" || ele.nodeName == null) {
    return false;
  }
  if (nodeName != null) {
    var test = ele.nodeName.toLowerCase();
    if (typeof nodeName == "string") {
      return test == nodeName.toLowerCase();
    }
    if (dwr.util._isArray(nodeName)) {
      var match = false;
      for (var i = 0; i < nodeName.length && !match; i++) {
        if (test == nodeName[i].toLowerCase()) {
          match =  true;
        }
      }
      return match;
    }
    dwr.util._debug("dwr.util._isHTMLElement was passed test node name that is neither a string or array of strings");
    return false;
  }
  return true;
};

/**
 * @private Like typeOf except that more information for an object is returned other than "object"
 */
dwr.util._detailedTypeOf = function(x) {
  var reply = typeof x;
  if (reply == "object") {
    reply = Object.prototype.toString.apply(x); // Returns "[object class]"
    reply = reply.substring(8, reply.length-1);  // Just get the class bit
  }
  return reply;
};

/**
 * @private Object detector. Excluding null from objects.
 */
dwr.util._isObject = function(data) {
  return (data && typeof data == "object");
};

/**
 * @private Array detector.
 */
dwr.util._isArray = function(data) {
  return (data && data instanceof Array);
};

/**
 * @private Date detector.
 */
dwr.util._isDate = function(data) {
  return (data && data instanceof Date);
};

/**
 * @private Used by setValue. Gets around the missing functionallity in IE.
 */
dwr.util._importNode = function(doc, importedNode, deep) {
  var newNode;

  if (importedNode.nodeType == 1 /*Node.ELEMENT_NODE*/) {
    newNode = doc.createElement(importedNode.nodeName);

    for (var i = 0; i < importedNode.attributes.length; i++) {
      var attr = importedNode.attributes[i];
      if (attr.nodeValue != null && attr.nodeValue != '') {
        newNode.setAttribute(attr.name, attr.nodeValue);
      }
    }

    if (typeof importedNode.style != "undefined") {
      newNode.style.cssText = importedNode.style.cssText;
    }
  }
  else if (importedNode.nodeType == 3 /*Node.TEXT_NODE*/) {
    newNode = doc.createTextNode(importedNode.nodeValue);
  }

  if (deep && importedNode.hasChildNodes()) {
    for (i = 0; i < importedNode.childNodes.length; i++) {
      newNode.appendChild(dwr.util._importNode(doc, importedNode.childNodes[i], true));
    }
  }

  return newNode;
};

/** @private Used internally when some message needs to get to the programmer */
dwr.util._debug = function(message, stacktrace) {
  var written = false;
  try {
    if (window.console) {
      if (stacktrace && window.console.trace) window.console.trace();
      window.console.log(message);
      written = true;
    }
    else if (window.opera && window.opera.postError) {
      window.opera.postError(message);
      written = true;
    }
  }
  catch (ex) { /* ignore */ }

  if (!written) {
    var debug = document.getElementById("dwr-debug");
    if (debug) {
      var contents = message + "<br/>" + debug.innerHTML;
      if (contents.length > 2048) contents = contents.substring(0, 2048);
      debug.innerHTML = contents;
    }
  }
};