(function (root, factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define(["jquery"], function ($) {
      return (root.returnExportsGlobal = factory($));
    });
  } else if (typeof exports === 'object') {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory(require("jquery"));
  } else {
    factory(jQuery);
  }
}(this, function ($) {

/*
  Implement Github like autocomplete mentions
  http://ichord.github.com/At.js

  Copyright (c) 2013 chord.luo@gmail.com
  Licensed under the MIT license.
*/

/*
本插件操作 textarea 或者 input 内的插入符
只实现了获得插入符在文本框中的位置，我设置
插入符的位置.
*/

"use strict";
var EditableCaret, InputCaret, Mirror, Utils, discoveryIframeOf, methods, oDocument, oFrame, oWindow, pluginName, setContextBy;

pluginName = 'caret';

EditableCaret = (function() {
  function EditableCaret($inputor) {
    this.$inputor = $inputor;
    this.domInputor = this.$inputor[0];
  }

  EditableCaret.prototype.setPos = function(pos) {
    var fn, found, offset, sel;
    if (sel = oWindow.getSelection()) {
      offset = 0;
      found = false;
      (fn = function(pos, parent) {
        var node, range, _i, _len, _ref, _results;
        _ref = parent.childNodes;
        _results = [];
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          node = _ref[_i];
          if (found) {
            break;
          }
          if (node.nodeType === 3) {
            if (offset + node.length >= pos) {
              found = true;
              range = oDocument.createRange();
              range.setStart(node, pos - offset);
              sel.removeAllRanges();
              sel.addRange(range);
              break;
            } else {
              _results.push(offset += node.length);
            }
          } else {
            _results.push(fn(pos, node));
          }
        }
        return _results;
      })(pos, this.domInputor);
    }
    return this.domInputor;
  };

  EditableCaret.prototype.getIEPosition = function() {
    return this.getPosition();
  };

  EditableCaret.prototype.getPosition = function() {
    var inputor_offset, offset;
    offset = this.getOffset();
    inputor_offset = this.$inputor.offset();
    offset.left -= inputor_offset.left;
    offset.top -= inputor_offset.top;
    return offset;
  };

  EditableCaret.prototype.getOldIEPos = function() {
    var preCaretTextRange, textRange;
    textRange = oDocument.selection.createRange();
    preCaretTextRange = oDocument.body.createTextRange();
    preCaretTextRange.moveToElementText(this.domInputor);
    preCaretTextRange.setEndPoint("EndToEnd", textRange);
    return preCaretTextRange.text.length;
  };

  EditableCaret.prototype.getPos = function() {
    var clonedRange, pos, range;
    if (range = this.range()) {
      clonedRange = range.cloneRange();
      clonedRange.selectNodeContents(this.domInputor);
      clonedRange.setEnd(range.endContainer, range.endOffset);
      pos = clonedRange.toString().length;
      clonedRange.detach();
      return pos;
    } else if (oDocument.selection) {
      return this.getOldIEPos();
    }
  };

  EditableCaret.prototype.getOldIEOffset = function() {
    var range, rect;
    range = oDocument.selection.createRange().duplicate();
    range.moveStart("character", -1);
    rect = range.getBoundingClientRect();
    return {
      height: rect.bottom - rect.top,
      left: rect.left,
      top: rect.top
    };
  };

  EditableCaret.prototype.getOffset = function(pos) {
    var clonedRange, offset, range, rect, shadowCaret;
    if (oWindow.getSelection && (range = this.range())) {
      if (range.endOffset - 1 > 0 && range.endContainer !== this.domInputor) {
        clonedRange = range.cloneRange();
        clonedRange.setStart(range.endContainer, range.endOffset - 1);
        clonedRange.setEnd(range.endContainer, range.endOffset);
        rect = clonedRange.getBoundingClientRect();
        offset = {
          height: rect.height,
          left: rect.left + rect.width,
          top: rect.top
        };
        clonedRange.detach();
      }
      if (!offset || (offset != null ? offset.height : void 0) === 0) {
        clonedRange = range.cloneRange();
        shadowCaret = $(oDocument.createTextNode("|"));
        clonedRange.insertNode(shadowCaret[0]);
        clonedRange.selectNode(shadowCaret[0]);
        rect = clonedRange.getBoundingClientRect();
        offset = {
          height: rect.height,
          left: rect.left,
          top: rect.top
        };
        shadowCaret.remove();
        clonedRange.detach();
      }
    } else if (oDocument.selection) {
      offset = this.getOldIEOffset();
    }
    if (offset) {
      offset.top += $(oWindow).scrollTop();
      offset.left += $(oWindow).scrollLeft();
    }
    return offset;
  };

  EditableCaret.prototype.range = function() {
    var sel;
    if (!oWindow.getSelection) {
      return;
    }
    sel = oWindow.getSelection();
    if (sel.rangeCount > 0) {
      return sel.getRangeAt(0);
    } else {
      return null;
    }
  };

  return EditableCaret;

})();

InputCaret = (function() {
  function InputCaret($inputor) {
    this.$inputor = $inputor;
    this.domInputor = this.$inputor[0];
  }

  InputCaret.prototype.getIEPos = function() {
    var endRange, inputor, len, normalizedValue, pos, range, textInputRange;
    inputor = this.domInputor;
    range = oDocument.selection.createRange();
    pos = 0;
    if (range && range.parentElement() === inputor) {
      normalizedValue = inputor.value.replace(/\r\n/g, "\n");
      len = normalizedValue.length;
      textInputRange = inputor.createTextRange();
      textInputRange.moveToBookmark(range.getBookmark());
      endRange = inputor.createTextRange();
      endRange.collapse(false);
      if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
        pos = len;
      } else {
        pos = -textInputRange.moveStart("character", -len);
      }
    }
    return pos;
  };

  InputCaret.prototype.getPos = function() {
    if (oDocument.selection) {
      return this.getIEPos();
    } else {
      return this.domInputor.selectionStart;
    }
  };

  InputCaret.prototype.setPos = function(pos) {
    var inputor, range;
    inputor = this.domInputor;
    if (oDocument.selection) {
      range = inputor.createTextRange();
      range.move("character", pos);
      range.select();
    } else if (inputor.setSelectionRange) {
      inputor.setSelectionRange(pos, pos);
    }
    return inputor;
  };

  InputCaret.prototype.getIEOffset = function(pos) {
    var h, textRange, x, y;
    textRange = this.domInputor.createTextRange();
    pos || (pos = this.getPos());
    textRange.move('character', pos);
    x = textRange.boundingLeft;
    y = textRange.boundingTop;
    h = textRange.boundingHeight;
    return {
      left: x,
      top: y,
      height: h
    };
  };

  InputCaret.prototype.getOffset = function(pos) {
    var $inputor, offset, position;
    $inputor = this.$inputor;
    if (oDocument.selection) {
      offset = this.getIEOffset(pos);
      offset.top += $(oWindow).scrollTop() + $inputor.scrollTop();
      offset.left += $(oWindow).scrollLeft() + $inputor.scrollLeft();
      return offset;
    } else {
      offset = $inputor.offset();
      position = this.getPosition(pos);
      return offset = {
        left: offset.left + position.left - $inputor.scrollLeft(),
        top: offset.top + position.top - $inputor.scrollTop(),
        height: position.height
      };
    }
  };

  InputCaret.prototype.getPosition = function(pos) {
    var $inputor, at_rect, end_range, format, html, mirror, start_range;
    $inputor = this.$inputor;
    format = function(value) {
      value = value.replace(/<|>|`|"|&/g, '?').replace(/\r\n|\r|\n/g, "<br/>");
      if (/firefox/i.test(navigator.userAgent)) {
        value = value.replace(/\s/g, '&nbsp;');
      }
      return value;
    };
    if (pos === void 0) {
      pos = this.getPos();
    }
    start_range = $inputor.val().slice(0, pos);
    end_range = $inputor.val().slice(pos);
    html = "<span style='position: relative; display: inline;'>" + format(start_range) + "</span>";
    html += "<span id='caret' style='position: relative; display: inline;'>|</span>";
    html += "<span style='position: relative; display: inline;'>" + format(end_range) + "</span>";
    mirror = new Mirror($inputor);
    return at_rect = mirror.create(html).rect();
  };

  InputCaret.prototype.getIEPosition = function(pos) {
    var h, inputorOffset, offset, x, y;
    offset = this.getIEOffset(pos);
    inputorOffset = this.$inputor.offset();
    x = offset.left - inputorOffset.left;
    y = offset.top - inputorOffset.top;
    h = offset.height;
    return {
      left: x,
      top: y,
      height: h
    };
  };

  return InputCaret;

})();

Mirror = (function() {
  Mirror.prototype.css_attr = ["borderBottomWidth", "borderLeftWidth", "borderRightWidth", "borderTopStyle", "borderRightStyle", "borderBottomStyle", "borderLeftStyle", "borderTopWidth", "boxSizing", "fontFamily", "fontSize", "fontWeight", "height", "letterSpacing", "lineHeight", "marginBottom", "marginLeft", "marginRight", "marginTop", "outlineWidth", "overflow", "overflowX", "overflowY", "paddingBottom", "paddingLeft", "paddingRight", "paddingTop", "textAlign", "textOverflow", "textTransform", "whiteSpace", "wordBreak", "wordWrap"];

  function Mirror($inputor) {
    this.$inputor = $inputor;
  }

  Mirror.prototype.mirrorCss = function() {
    var css,
      _this = this;
    css = {
      position: 'absolute',
      left: -9999,
      top: 0,
      zIndex: -20000
    };
    if (this.$inputor.prop('tagName') === 'TEXTAREA') {
      this.css_attr.push('width');
    }
    $.each(this.css_attr, function(i, p) {
      return css[p] = _this.$inputor.css(p);
    });
    return css;
  };

  Mirror.prototype.create = function(html) {
    this.$mirror = $('<div></div>');
    this.$mirror.css(this.mirrorCss());
    this.$mirror.html(html);
    this.$inputor.after(this.$mirror);
    return this;
  };

  Mirror.prototype.rect = function() {
    var $flag, pos, rect;
    $flag = this.$mirror.find("#caret");
    pos = $flag.position();
    rect = {
      left: pos.left,
      top: pos.top,
      height: $flag.height()
    };
    this.$mirror.remove();
    return rect;
  };

  return Mirror;

})();

Utils = {
  contentEditable: function($inputor) {
    return !!($inputor[0].contentEditable && $inputor[0].contentEditable === 'true');
  }
};

methods = {
  pos: function(pos) {
    if (pos || pos === 0) {
      return this.setPos(pos);
    } else {
      return this.getPos();
    }
  },
  position: function(pos) {
    if (oDocument.selection) {
      return this.getIEPosition(pos);
    } else {
      return this.getPosition(pos);
    }
  },
  offset: function(pos) {
    var offset;
    offset = this.getOffset(pos);
    return offset;
  }
};

oDocument = null;

oWindow = null;

oFrame = null;

setContextBy = function(settings) {
  var iframe;
  if (iframe = settings != null ? settings.iframe : void 0) {
    oFrame = iframe;
    oWindow = iframe.contentWindow;
    return oDocument = iframe.contentDocument || oWindow.document;
  } else {
    oFrame = void 0;
    oWindow = window;
    return oDocument = document;
  }
};

discoveryIframeOf = function($dom) {
  var error;
  oDocument = $dom[0].ownerDocument;
  oWindow = oDocument.defaultView || oDocument.parentWindow;
  try {
    return oFrame = oWindow.frameElement;
  } catch (_error) {
    error = _error;
  }
};

$.fn.caret = function(method, value, settings) {
  var caret;
  if (methods[method]) {
    if ($.isPlainObject(value)) {
      setContextBy(value);
      value = void 0;
    } else {
      setContextBy(settings);
    }
    caret = Utils.contentEditable(this) ? new EditableCaret(this) : new InputCaret(this);
    return methods[method].apply(caret, [value]);
  } else {
    return $.error("Method " + method + " does not exist on jQuery.caret");
  }
};

$.fn.caret.EditableCaret = EditableCaret;

$.fn.caret.InputCaret = InputCaret;

$.fn.caret.Utils = Utils;

$.fn.caret.apis = methods;


}));