(function() {
  var browser = baidu.editor.browser,
    domUtils = baidu.editor.dom.domUtils;

  var magic = "$EDITORUI";
  var root = (window[magic] = {});
  var uidMagic = "ID" + magic;
  var uidCount = 0;

  var uiUtils = (baidu.editor.ui.uiUtils = {
    uid: function(obj) {
      return obj ? obj[uidMagic] || (obj[uidMagic] = ++uidCount) : ++uidCount;
    },
    hook: function(fn, callback) {
      var dg;
      if (fn && fn._callbacks) {
        dg = fn;
      } else {
        dg = function() {
          var q;
          if (fn) {
            q = fn.apply(this, arguments);
          }
          var callbacks = dg._callbacks;
          var k = callbacks.length;
          while (k--) {
            var r = callbacks[k].apply(this, arguments);
            if (q === undefined) {
              q = r;
            }
          }
          return q;
        };
        dg._callbacks = [];
      }
      dg._callbacks.push(callback);
      return dg;
    },
    createElementByHtml: function(html) {
      var el = document.createElement("div");
      el.innerHTML = html;
      el = el.firstChild;
      el.parentNode.removeChild(el);
      return el;
    },
    getViewportElement: function() {
      return browser.ie && browser.quirks
        ? document.body
        : document.documentElement;
    },
    getClientRect: function(element) {
      var bcr;
      //trace  IE6下在控制编辑器显隐时可能会报错，catch一下
      try {
        bcr = element.getBoundingClientRect();
      } catch (e) {
        bcr = { left: 0, top: 0, height: 0, width: 0 };
      }
      var rect = {
        left: Math.round(bcr.left),
        top: Math.round(bcr.top),
        height: Math.round(bcr.bottom - bcr.top),
        width: Math.round(bcr.right - bcr.left)
      };
      var doc;
      while (
        (doc = element.ownerDocument) !== document &&
        (element = domUtils.getWindow(doc).frameElement)
      ) {
        bcr = element.getBoundingClientRect();
        rect.left += bcr.left;
        rect.top += bcr.top;
      }
      rect.bottom = rect.top + rect.height;
      rect.right = rect.left + rect.width;
      return rect;
    },
    getViewportRect: function() {
      var viewportEl = uiUtils.getViewportElement();
      var width = (window.innerWidth || viewportEl.clientWidth) | 0;
      var height = (window.innerHeight || viewportEl.clientHeight) | 0;
      return {
        left: 0,
        top: 0,
        height: height,
        width: width,
        bottom: height,
        right: width
      };
    },
    setViewportOffset: function(element, offset) {
      var rect;
      var fixedLayer = uiUtils.getFixedLayer();
      if (element.parentNode === fixedLayer) {
        element.style.left = offset.left + "px";
        element.style.top = offset.top + "px";
      } else {
        domUtils.setViewportOffset(element, offset);
      }
    },
    getEventOffset: function(evt) {
      var el = evt.target || evt.srcElement;
      var rect = uiUtils.getClientRect(el);
      var offset = uiUtils.getViewportOffsetByEvent(evt);
      return {
        left: offset.left - rect.left,
        top: offset.top - rect.top
      };
    },
    getViewportOffsetByEvent: function(evt) {
      var el = evt.target || evt.srcElement;
      var frameEl = domUtils.getWindow(el).frameElement;
      var offset = {
        left: evt.clientX,
        top: evt.clientY
      };
      if (frameEl && el.ownerDocument !== document) {
        var rect = uiUtils.getClientRect(frameEl);
        offset.left += rect.left;
        offset.top += rect.top;
      }
      return offset;
    },
    setGlobal: function(id, obj) {
      root[id] = obj;
      return magic + '["' + id + '"]';
    },
    unsetGlobal: function(id) {
      delete root[id];
    },
    copyAttributes: function(tgt, src) {
      var attributes = src.attributes;
      var k = attributes.length;
      while (k--) {
        var attrNode = attributes[k];
        if (
          attrNode.nodeName != "style" &&
          attrNode.nodeName != "class" &&
          (!browser.ie || attrNode.specified)
        ) {
          tgt.setAttribute(attrNode.nodeName, attrNode.nodeValue);
        }
      }
      if (src.className) {
        domUtils.addClass(tgt, src.className);
      }
      if (src.style.cssText) {
        tgt.style.cssText += ";" + src.style.cssText;
      }
    },
    removeStyle: function(el, styleName) {
      if (el.style.removeProperty) {
        el.style.removeProperty(styleName);
      } else if (el.style.removeAttribute) {
        el.style.removeAttribute(styleName);
      } else throw "";
    },
    contains: function(elA, elB) {
      return (
        elA &&
        elB &&
        (elA === elB
          ? false
          : elA.contains
            ? elA.contains(elB)
            : elA.compareDocumentPosition(elB) & 16)
      );
    },
    startDrag: function(evt, callbacks, doc) {
      var doc = doc || document;
      var startX = evt.clientX;
      var startY = evt.clientY;
      function handleMouseMove(evt) {
        var x = evt.clientX - startX;
        var y = evt.clientY - startY;
        callbacks.ondragmove(x, y, evt);
        if (evt.stopPropagation) {
          evt.stopPropagation();
        } else {
          evt.cancelBubble = true;
        }
      }
      if (doc.addEventListener) {
        function handleMouseUp(evt) {
          doc.removeEventListener("mousemove", handleMouseMove, true);
          doc.removeEventListener("mouseup", handleMouseUp, true);
          window.removeEventListener("mouseup", handleMouseUp, true);
          callbacks.ondragstop();
        }
        doc.addEventListener("mousemove", handleMouseMove, true);
        doc.addEventListener("mouseup", handleMouseUp, true);
        window.addEventListener("mouseup", handleMouseUp, true);

        evt.preventDefault();
      } else {
        var elm = evt.srcElement;
        elm.setCapture();
        function releaseCaptrue() {
          elm.releaseCapture();
          elm.detachEvent("onmousemove", handleMouseMove);
          elm.detachEvent("onmouseup", releaseCaptrue);
          elm.detachEvent("onlosecaptrue", releaseCaptrue);
          callbacks.ondragstop();
        }
        elm.attachEvent("onmousemove", handleMouseMove);
        elm.attachEvent("onmouseup", releaseCaptrue);
        elm.attachEvent("onlosecaptrue", releaseCaptrue);
        evt.returnValue = false;
      }
      callbacks.ondragstart();
    },
    getFixedLayer: function() {
      var layer = document.getElementById("edui_fixedlayer");
      if (layer == null) {
        layer = document.createElement("div");
        layer.id = "edui_fixedlayer";
        document.body.appendChild(layer);
        if (browser.ie && browser.version <= 8) {
          layer.style.position = "absolute";
          bindFixedLayer();
          setTimeout(updateFixedOffset);
        } else {
          layer.style.position = "fixed";
        }
        layer.style.left = "0";
        layer.style.top = "0";
        layer.style.width = "0";
        layer.style.height = "0";
      }
      return layer;
    },
    makeUnselectable: function(element) {
      if (browser.opera || (browser.ie && browser.version < 9)) {
        element.unselectable = "on";
        if (element.hasChildNodes()) {
          for (var i = 0; i < element.childNodes.length; i++) {
            if (element.childNodes[i].nodeType == 1) {
              uiUtils.makeUnselectable(element.childNodes[i]);
            }
          }
        }
      } else {
        if (element.style.MozUserSelect !== undefined) {
          element.style.MozUserSelect = "none";
        } else if (element.style.WebkitUserSelect !== undefined) {
          element.style.WebkitUserSelect = "none";
        } else if (element.style.KhtmlUserSelect !== undefined) {
          element.style.KhtmlUserSelect = "none";
        }
      }
    }
  });
  function updateFixedOffset() {
    var layer = document.getElementById("edui_fixedlayer");
    uiUtils.setViewportOffset(layer, {
      left: 0,
      top: 0
    });
    //        layer.style.display = 'none';
    //        layer.style.display = 'block';

    //#trace: 1354
    //        setTimeout(updateFixedOffset);
  }
  function bindFixedLayer(adjOffset) {
    domUtils.on(window, "scroll", updateFixedOffset);
    domUtils.on(
      window,
      "resize",
      baidu.editor.utils.defer(updateFixedOffset, 0, true)
    );
  }
})();