/**
 * 自动排版
 * @file
 * @since 1.2.6.1
 */

/**
 * 对当前编辑器的内容执行自动排版， 排版的行为根据config配置文件里的“autotypeset”选项进行控制。
 * @command autotypeset
 * @method execCommand
 * @param { String } cmd 命令字符串
 * @example
 * ```javascript
 * editor.execCommand( 'autotypeset' );
 * ```
 */

UE.plugins["autotypeset"] = function() {
  this.setOpt({
    autotypeset: {
      mergeEmptyline: true, //合并空行
      removeClass: true, //去掉冗余的class
      removeEmptyline: false, //去掉空行
      textAlign: "left", //段落的排版方式，可以是 left,right,center,justify 去掉这个属性表示不执行排版
      imageBlockLine: "center", //图片的浮动方式，独占一行剧中,左右浮动，默认: center,left,right,none 去掉这个属性表示不执行排版
      pasteFilter: false, //根据规则过滤没事粘贴进来的内容
      clearFontSize: false, //去掉所有的内嵌字号，使用编辑器默认的字号
      clearFontFamily: false, //去掉所有的内嵌字体，使用编辑器默认的字体
      removeEmptyNode: false, // 去掉空节点
      //可以去掉的标签
      removeTagNames: utils.extend({ div: 1 }, dtd.$removeEmpty),
      indent: false, // 行首缩进
      indentValue: "2em", //行首缩进的大小
      bdc2sb: false,
      tobdc: false
    }
  });

  var me = this,
    opt = me.options.autotypeset,
    remainClass = {
      selectTdClass: 1,
      pagebreak: 1,
      anchorclass: 1
    },
    remainTag = {
      li: 1
    },
    tags = {
      div: 1,
      p: 1,
      //trace:2183 这些也认为是行
      blockquote: 1,
      center: 1,
      h1: 1,
      h2: 1,
      h3: 1,
      h4: 1,
      h5: 1,
      h6: 1,
      span: 1
    },
    highlightCont;
  //升级了版本，但配置项目里没有autotypeset
  if (!opt) {
    return;
  }

  readLocalOpts();

  function isLine(node, notEmpty) {
    if (!node || node.nodeType == 3) return 0;
    if (domUtils.isBr(node)) return 1;
    if (node && node.parentNode && tags[node.tagName.toLowerCase()]) {
      if (
        (highlightCont && highlightCont.contains(node)) ||
        node.getAttribute("pagebreak")
      ) {
        return 0;
      }

      return notEmpty
        ? !domUtils.isEmptyBlock(node)
        : domUtils.isEmptyBlock(
            node,
            new RegExp("[\\s" + domUtils.fillChar + "]", "g")
          );
    }
  }

  function removeNotAttributeSpan(node) {
    if (!node.style.cssText) {
      domUtils.removeAttributes(node, ["style"]);
      if (
        node.tagName.toLowerCase() == "span" &&
        domUtils.hasNoAttributes(node)
      ) {
        domUtils.remove(node, true);
      }
    }
  }
  function autotype(type, html) {
    var me = this,
      cont;
    if (html) {
      if (!opt.pasteFilter) {
        return;
      }
      cont = me.document.createElement("div");
      cont.innerHTML = html.html;
    } else {
      cont = me.document.body;
    }
    var nodes = domUtils.getElementsByTagName(cont, "*");

    // 行首缩进，段落方向，段间距，段内间距
    for (var i = 0, ci; (ci = nodes[i++]); ) {
      if (me.fireEvent("excludeNodeinautotype", ci) === true) {
        continue;
      }
      //font-size
      if (opt.clearFontSize && ci.style.fontSize) {
        domUtils.removeStyle(ci, "font-size");

        removeNotAttributeSpan(ci);
      }
      //font-family
      if (opt.clearFontFamily && ci.style.fontFamily) {
        domUtils.removeStyle(ci, "font-family");
        removeNotAttributeSpan(ci);
      }

      if (isLine(ci)) {
        //合并空行
        if (opt.mergeEmptyline) {
          var next = ci.nextSibling,
            tmpNode,
            isBr = domUtils.isBr(ci);
          while (isLine(next)) {
            tmpNode = next;
            next = tmpNode.nextSibling;
            if (isBr && (!next || (next && !domUtils.isBr(next)))) {
              break;
            }
            domUtils.remove(tmpNode);
          }
        }
        //去掉空行，保留占位的空行
        if (
          opt.removeEmptyline &&
          domUtils.inDoc(ci, cont) &&
          !remainTag[ci.parentNode.tagName.toLowerCase()]
        ) {
          if (domUtils.isBr(ci)) {
            next = ci.nextSibling;
            if (next && !domUtils.isBr(next)) {
              continue;
            }
          }
          domUtils.remove(ci);
          continue;
        }
      }
      if (isLine(ci, true) && ci.tagName != "SPAN") {
        if (opt.indent) {
          ci.style.textIndent = opt.indentValue;
        }
        if (opt.textAlign) {
          ci.style.textAlign = opt.textAlign;
        }
        // if(opt.lineHeight)
        //     ci.style.lineHeight = opt.lineHeight + 'cm';
      }

      //去掉class,保留的class不去掉
      if (
        opt.removeClass &&
        ci.className &&
        !remainClass[ci.className.toLowerCase()]
      ) {
        if (highlightCont && highlightCont.contains(ci)) {
          continue;
        }
        domUtils.removeAttributes(ci, ["class"]);
      }

      //表情不处理
      if (
        opt.imageBlockLine &&
        ci.tagName.toLowerCase() == "img" &&
        !ci.getAttribute("emotion")
      ) {
        if (html) {
          var img = ci;
          switch (opt.imageBlockLine) {
            case "left":
            case "right":
            case "none":
              var pN = img.parentNode,
                tmpNode,
                pre,
                next;
              while (dtd.$inline[pN.tagName] || pN.tagName == "A") {
                pN = pN.parentNode;
              }
              tmpNode = pN;
              if (
                tmpNode.tagName == "P" &&
                domUtils.getStyle(tmpNode, "text-align") == "center"
              ) {
                if (
                  !domUtils.isBody(tmpNode) &&
                  domUtils.getChildCount(tmpNode, function(node) {
                    return !domUtils.isBr(node) && !domUtils.isWhitespace(node);
                  }) == 1
                ) {
                  pre = tmpNode.previousSibling;
                  next = tmpNode.nextSibling;
                  if (
                    pre &&
                    next &&
                    pre.nodeType == 1 &&
                    next.nodeType == 1 &&
                    pre.tagName == next.tagName &&
                    domUtils.isBlockElm(pre)
                  ) {
                    pre.appendChild(tmpNode.firstChild);
                    while (next.firstChild) {
                      pre.appendChild(next.firstChild);
                    }
                    domUtils.remove(tmpNode);
                    domUtils.remove(next);
                  } else {
                    domUtils.setStyle(tmpNode, "text-align", "");
                  }
                }
              }
              domUtils.setStyle(img, "float", opt.imageBlockLine);
              break;
            case "center":
              if (me.queryCommandValue("imagefloat") != "center") {
                pN = img.parentNode;
                domUtils.setStyle(img, "float", "none");
                tmpNode = img;
                while (
                  pN &&
                  domUtils.getChildCount(pN, function(node) {
                    return !domUtils.isBr(node) && !domUtils.isWhitespace(node);
                  }) == 1 &&
                  (dtd.$inline[pN.tagName] || pN.tagName == "A")
                ) {
                  tmpNode = pN;
                  pN = pN.parentNode;
                }
                var pNode = me.document.createElement("p");
                domUtils.setAttributes(pNode, {
                  style: "text-align:center"
                });
                tmpNode.parentNode.insertBefore(pNode, tmpNode);
                pNode.appendChild(tmpNode);
                domUtils.setStyle(tmpNode, "float", "");
              }
          }
        } else {
          var range = me.selection.getRange();
          range.selectNode(ci).select();
          me.execCommand("imagefloat", opt.imageBlockLine);
        }
      }

      //去掉冗余的标签
      if (opt.removeEmptyNode) {
        if (
          opt.removeTagNames[ci.tagName.toLowerCase()] &&
          domUtils.hasNoAttributes(ci) &&
          domUtils.isEmptyBlock(ci)
        ) {
          domUtils.remove(ci);
        }
      }
    }
    if (opt.tobdc) {
      var root = UE.htmlparser(cont.innerHTML);
      root.traversal(function(node) {
        if (node.type == "text") {
          node.data = ToDBC(node.data);
        }
      });
      cont.innerHTML = root.toHtml();
    }
    if (opt.bdc2sb) {
      var root = UE.htmlparser(cont.innerHTML);
      root.traversal(function(node) {
        if (node.type == "text") {
          node.data = DBC2SB(node.data);
        }
      });
      cont.innerHTML = root.toHtml();
    }
    if (html) {
      html.html = cont.innerHTML;
    }
  }
  if (opt.pasteFilter) {
    me.addListener("beforepaste", autotype);
  }

  function DBC2SB(str) {
    var result = "";
    for (var i = 0; i < str.length; i++) {
      var code = str.charCodeAt(i); //获取当前字符的unicode编码
      if (code >= 65281 && code <= 65373) {
        //在这个unicode编码范围中的是所有的英文字母已经各种字符
        result += String.fromCharCode(str.charCodeAt(i) - 65248); //把全角字符的unicode编码转换为对应半角字符的unicode码
      } else if (code == 12288) {
        //空格
        result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
      } else {
        result += str.charAt(i);
      }
    }
    return result;
  }
  function ToDBC(txtstring) {
    txtstring = utils.html(txtstring);
    var tmp = "";
    var mark = ""; /*用于判断,如果是html尖括里的标记,则不进行全角的转换*/
    for (var i = 0; i < txtstring.length; i++) {
      if (txtstring.charCodeAt(i) == 32) {
        tmp = tmp + String.fromCharCode(12288);
      } else if (txtstring.charCodeAt(i) < 127) {
        tmp = tmp + String.fromCharCode(txtstring.charCodeAt(i) + 65248);
      } else {
        tmp += txtstring.charAt(i);
      }
    }
    return tmp;
  }

  function readLocalOpts() {
    var cookieOpt = me.getPreferences("autotypeset");
    utils.extend(me.options.autotypeset, cookieOpt);
  }

  me.commands["autotypeset"] = {
    execCommand: function() {
      me.removeListener("beforepaste", autotype);
      if (opt.pasteFilter) {
        me.addListener("beforepaste", autotype);
      }
      autotype.call(me);
    }
  };
};