rc-tile-map/lib/BMapLib/InfoBox.js

地图组件

'use strict';

/**
 * @fileoverview 百度地图的自定义信息窗口，对外开放。
 * 用户自定义信息窗口的各种样式。例如：border，margin，padding，color，background等
 * 主入口类是<a href="symbols/BMapLib.InfoBox.html">InfoBox</a>，
 * 基于Baidu Map API 1.2。
 *
 * @author Baidu Map Api Group
 * @version 1.2
 */
/**
 * @namespace BMap的所有library类均放在BMapLib命名空间下
 */
var BMapLib = window.BMapLib = window.BMapLib || {};
// 常量，infoBox可以出现的位置，此版本只可实现上下两个方向。
var INFOBOX_AT_TOP = 1;
var INFOBOX_AT_BOTTOM = 3;
var temp = function temp() {
  // 声明baidu包
  var T;
  var baidu = T = window.baidu || { version: '1.5.0' };
  baidu.guid = '$BAIDU$'
  // 以下方法为百度Tangram框架中的方法，请到http://tangram.baidu.com 查看文档
  ;(function () {
    window[baidu.guid] = window[baidu.guid] || {};

    baidu.lang = baidu.lang || {};
    baidu.lang.isString = function (source) {
      return Object.prototype.toString.call(source) === '[object String]';
    };
    baidu.lang.isFunction = function (source) {
      return Object.prototype.toString.call(source) === '[object Function]';
    };
    baidu.lang.Event = function (type, target) {
      this.type = type;
      this.returnValue = true;
      this.target = target || null;
      this.currentTarget = null;
    };

    baidu.object = baidu.object || {};
    baidu.extend = baidu.object.extend = function (target, source) {
      for (var p in source) {
        if (source.hasOwnProperty(p)) {
          target[p] = source[p];
        }
      }

      return target;
    };
    baidu.event = baidu.event || {};
    baidu.event._listeners = baidu.event._listeners || [];
    baidu.dom = baidu.dom || {};

    baidu.dom._g = function (id) {
      if (baidu.lang.isString(id)) {
        return document.getElementById(id);
      }
      return id;
    };
    baidu._g = baidu.dom._g;
    baidu.event.on = function (element, type, listener) {
      type = type.replace(/^on/i, '');
      element = baidu.dom._g(element);
      var realListener = function realListener(ev) {
        // 1. 这里不支持EventArgument,  原因是跨frame的事件挂载
        // 2. element是为了修正this
        listener.call(element, ev);
      };
      var lis = baidu.event._listeners;
      var filter = baidu.event._eventFilter;
      var afterFilter;
      var realType = type;
      type = type.toLowerCase();
      // filter过滤
      if (filter && filter[type]) {
        afterFilter = filter[type](element, type, realListener);
        realType = afterFilter.type;
        realListener = afterFilter.listener;
      }

      // 事件监听器挂载
      if (element.addEventListener) {
        element.addEventListener(realType, realListener, false);
      } else if (element.attachEvent) {
        element.attachEvent('on' + realType, realListener);
      }
      // 将监听器存储到数组中
      lis[lis.length] = [element, type, listener, realListener, realType];
      return element;
    };

    baidu.on = baidu.event.on;
    baidu.event.un = function (element, type, listener) {
      element = baidu.dom._g(element);
      type = type.replace(/^on/i, '').toLowerCase();

      var lis = baidu.event._listeners;
      var len = lis.length;
      var isRemoveAll = !listener;
      var item;
      var realType;
      var realListener;
      while (len--) {
        item = lis[len];

        if (item[1] === type && item[0] === element && (isRemoveAll || item[2] === listener)) {
          realType = item[4];
          realListener = item[3];
          if (element.removeEventListener) {
            element.removeEventListener(realType, realListener, false);
          } else if (element.detachEvent) {
            element.detachEvent('on' + realType, realListener);
          }
          lis.splice(len, 1);
        }
      }

      return element;
    };
    baidu.un = baidu.event.un;
    baidu.dom.g = function (id) {
      if (typeof id === 'string' || id instanceof String) {
        return document.getElementById(id);
      } else if (id && id.nodeName && (id.nodeType === 1 || id.nodeType === 9)) {
        return id;
      }
      return null;
    };
    baidu.g = baidu.G = baidu.dom.g;
    baidu.dom._styleFixer = baidu.dom._styleFixer || {};
    baidu.dom._styleFilter = baidu.dom._styleFilter || [];
    baidu.dom._styleFilter.filter = function (key, value, method) {
      for (var i = 0, filters = baidu.dom._styleFilter, filter; filter = filters[i]; i++) {
        if (filter = filter[method]) {
          value = filter(key, value);
        }
      }
      return value;
    };
    baidu.string = baidu.string || {};

    baidu.string.toCamelCase = function (source) {
      // 提前判断，提高getStyle等的效率 thanks xianwei
      if (source.indexOf('-') < 0 && source.indexOf('_') < 0) {
        return source;
      }
      return source.replace(/[-_][^-_]/g, function (match) {
        return match.charAt(1).toUpperCase();
      });
    };

    baidu.dom.setStyle = function (element, key, value) {
      var dom = baidu.dom;
      var fixer;

      // 放弃了对firefox 0.9的opacity的支持
      element = dom.g(element);
      key = baidu.string.toCamelCase(key);

      if (fixer = dom._styleFilter) {
        value = fixer.filter(key, value, 'set');
      }

      fixer = dom._styleFixer[key];
      fixer && fixer.set ? fixer.set(element, value) : element.style[fixer || key] = value;

      return element;
    };

    baidu.setStyle = baidu.dom.setStyle;

    baidu.dom.setStyles = function (element, styles) {
      element = baidu.dom.g(element);
      for (var key in styles) {
        baidu.dom.setStyle(element, key, styles[key]);
      }
      return element;
    };
    baidu.setStyles = baidu.dom.setStyles;
    baidu.browser = baidu.browser || {};
    baidu.browser.ie = baidu.ie = /msie (\d+\.\d+)/i.test(navigator.userAgent) ? document.documentMode || +RegExp['\x241'] : undefined;
    baidu.dom._NAME_ATTRS = function () {
      var result = {
        cellpadding: 'cellPadding',
        cellspacing: 'cellSpacing',
        colspan: 'colSpan',
        rowspan: 'rowSpan',
        valign: 'vAlign',
        usemap: 'useMap',
        frameborder: 'frameBorder'
      };

      if (baidu.browser.ie < 8) {
        result['for'] = 'htmlFor';
        result['class'] = 'className';
      } else {
        result['htmlFor'] = 'for';
        result['className'] = 'class';
      }

      return result;
    }();
    baidu.dom.setAttr = function (element, key, value) {
      element = baidu.dom.g(element);
      if (key === 'style') {
        element.style.cssText = value;
      } else {
        key = baidu.dom._NAME_ATTRS[key] || key;
        element.setAttribute(key, value);
      }
      return element;
    };
    baidu.setAttr = baidu.dom.setAttr;
    baidu.dom.setAttrs = function (element, attributes) {
      element = baidu.dom.g(element);
      for (var key in attributes) {
        baidu.dom.setAttr(element, key, attributes[key]);
      }
      return element;
    };
    baidu.setAttrs = baidu.dom.setAttrs;
    baidu.dom.create = function (tagName, opt_attributes) {
      var el = document.createElement(tagName);
      var attributes = opt_attributes || {};
      return baidu.dom.setAttrs(el, attributes);
    };
    T.undope = true;
  })();

  /**
   * @exports InfoBox as BMapLib.InfoBox
   */

  var InfoBox =
  /**
   * InfoBox类的构造函数
   * @class InfoBox <b>入口</b>。
   * 可以自定义border,margin,padding,关闭按钮等等。
   * @constructor
       * @param {Map} map Baidu map的实例对象.
       * @param {String} content infoBox中的内容.
       * @param {Json Object} opts 可选的输入参数，非必填项。可输入选项包括：<br />
       * {<br />"<b>offset</b>" : {Size} infoBox的偏移量
       * <br />"<b>boxClass</b>" : {String} 定义infoBox的class,
       * <br />"<b>boxStyle</b>" : {Json} 定义infoBox的style,此项会覆盖boxClass<br />
       * <br />"<b>closeIconMargin</b>" : {String} 关闭按钮的margin    <br />
       * <br />"<b>closeIconUrl</b>" : {String} 关闭按钮的url地址    <br />
       * <br />"<b>enableAutoPan</b>" : {Boolean} 是否启动自动平移功能    <br />
       * <br />"<b>align</b>" : {Number} 基于哪个位置进行定位，取值为[INFOBOX_AT_TOP,INFOBOX_AT_BOTTOM]<br />
       * }<br />.
       * @example <b>参考示例：</b><br />
       * var infoBox = new window.BMapLib.InfoBox(map,"百度地图api",{boxStyle:{background:"url('tipbox.gif') no-repeat
        center top",width: "200px"},closeIconMargin: "10px 2px 0 0",enableAutoPan: true
        ,alignBottom: false});
   */
  BMapLib.InfoBox = function (map, content, opts) {
    this._content = content || '';
    this._isOpen = false;
    this._map = map;

    this._opts = opts = opts || {};
    this._opts.offset = opts.offset || new window.BMap.Size(0, 0);
    this._opts.boxClass = opts.boxClass || 'infoBox';
    this._opts.boxStyle = opts.boxStyle || {};
    this._opts.ignoreMarkerSize = opts.ignoreMarkerSize;
    this._opts.closeIconMargin = opts.closeIconMargin || '2px';
    this._opts.closeIconUrl = opts.closeIconUrl || '//cdncs.101.com/v0.1/static/fish/image/close.png';
    this._opts.enableAutoPan = !!opts.enableAutoPan;
    this._opts.align = opts.align || INFOBOX_AT_TOP;
  };
  if (!window.BMap) {
    return;
  }
  InfoBox.prototype = new window.BMap.Overlay();
  InfoBox.prototype.initialize = function (map) {
    var me = this;
    var div = this._div = baidu.dom.create('div', {
      'class': this._opts.boxClass
    });
    baidu.dom.setStyles(div, this._opts.boxStyle);
    // 设置position为absolute，用于定位
    div.style.position = 'absolute';
    this._setContent(this._content);

    var floatPane = map.getPanes().floatPane;
    floatPane.style.width = 'auto';
    floatPane.appendChild(div);
    // 设置完内容后，获取div的宽度,高度
    this._getInfoBoxSize();
    // this._boxWidth = parseInt(this._div.offsetWidth,10);
    // this._boxHeight = parseInt(this._div.offsetHeight,10);
    // 阻止各种冒泡事件
    baidu.event.on(div, 'onmousedown', function (e) {
      me._stopBubble(e);
    });
    baidu.event.on(div, 'onmouseover', function (e) {
      me._stopBubble(e);
    });
    baidu.event.on(div, 'click', function (e) {
      me._stopBubble(e);
    });
    baidu.event.on(div, 'dblclick', function (e) {
      me._stopBubble(e);
    });
    return div;
  };
  InfoBox.prototype.draw = function () {
    this._isOpen && this._adjustPosition(this._point);
  };
  /**
   * 打开infoBox
   * @param {Marker|Point} anchor 要在哪个marker或者point上打开infobox
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.open();
   */
  InfoBox.prototype.open = function (anchor) {
    var me = this;
    var poi;
    if (!this._isOpen) {
      this._map.addOverlay(this);
      this._isOpen = true;
      // 延迟10ms派发open事件，使后绑定的事件可以触发。
      setTimeout(function () {
        me._dispatchEvent(me, 'open', { point: me._point });
      }, 10);
    }
    if (anchor instanceof window.BMap.Point) {
      poi = anchor;
      // 清除之前存在的marker事件绑定，如果存在的话
      this._removeMarkerEvt();
    } else if (anchor instanceof window.BMap.Marker) {
      // 如果当前marker不为空，说明是第二个marker，或者第二次点open按钮,先移除掉之前绑定的事件
      if (this._marker) {
        this._removeMarkerEvt();
      }
      poi = anchor.getPosition();
      this._marker = anchor;
      !this._markerDragend && this._marker.addEventListener('dragend', this._markerDragend = function (e) {
        me._point = e.point;
        me._adjustPosition(me._point);
        me._panBox();
        me.show();
      });
      // 给marker绑定dragging事件，拖动marker的时候，infoBox也跟随移动
      !this._markerDragging && this._marker.addEventListener('dragging', this._markerDragging = function () {
        me.hide();
        me._point = me._marker.getPosition();
        me._adjustPosition(me._point);
      });
    }
    // 打开的时候，将infowindow显示
    this.show();
    this._point = poi;
    this._panBox();
    this._adjustPosition(this._point);
  };
  /**
   * 关闭infoBox
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.close();
   */
  InfoBox.prototype.close = function () {
    if (this._isOpen) {
      this._map.removeOverlay(this);
      this._remove();
      this._isOpen = false;
      this._dispatchEvent(this, 'close', { point: this._point });
    }
  };

  /**
   * 打开infoBox时，派发事件的接口
   * @name InfoBox#Open
   * @event
   * @param {Event Object} e 回调函数会返回event参数，包括以下返回值：
   * <br />{"<b>target</b> : {BMap.Overlay} 触发事件的元素,
   * <br />"<b>type</b>：{String} 事件类型,
   * <br />"<b>point</b>：{Point} infoBox的打开位置}
   *
   * @example <b>参考示例：</b>
   * infoBox.addEventListener("open", function(e) {
   *     alert(e.type);
   * });
   */
  /**
   * 关闭infoBox时，派发事件的接口
   * @name InfoBox#Close
   * @event
   * @param {Event Object} e 回调函数会返回event参数，包括以下返回值：
   * <br />{"<b>target</b> : {BMap.Overlay} 触发事件的元素,
   * <br />"<b>type</b>：{String} 事件类型,
   * <br />"<b>point</b>：{Point} infoBox的关闭位置}
   *
   * @example <b>参考示例：</b>
   * infoBox.addEventListener("close", function(e) {
   *     alert(e.type);
   * });
   */
  /**
   * 启用自动平移
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.enableAutoPan();
   */
  InfoBox.prototype.enableAutoPan = function () {
    this._opts.enableAutoPan = true;
  };
  /**
   * 禁用自动平移
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.disableAutoPan();
   */
  InfoBox.prototype.disableAutoPan = function () {
    this._opts.enableAutoPan = false;
  };
  /**
   * 设置infoBox的内容
   * @param {String|HTMLElement} content 弹出气泡中的内容
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.setContent("百度地图API");
   */
  InfoBox.prototype.setContent = function (content) {
    this._setContent(content);
    this._getInfoBoxSize();
    this._adjustPosition(this._point);
  };
  /**
   * 设置信息窗的地理位置
   * @param {Point} point 设置position
   * @return none
   *
   * @example <b>参考示例：</b><br />
   * infoBox.setPosition(new window.BMap.Point(116.35,39.911));
   */
  InfoBox.prototype.setPosition = function (poi) {
    this._point = poi;
    this._adjustPosition(poi);
    this._removeMarkerEvt();
  };
  /**
   * 获得信息窗的地理位置
   * @param none
   * @return {Point} 信息窗的地理坐标
   *
   * @example <b>参考示例：</b><br />
   * infoBox.getPosition();
   */
  InfoBox.prototype.getPosition = function () {
    return this._point;
  };
  /**
   * 返回信息窗口的箭头距离信息窗口在地图
   * 上所锚定的地理坐标点的像素偏移量。
   * @return {Size} Size
   *
   * @example <b>参考示例：</b><br />
   * infoBox.getOffset();
   */
  InfoBox.prototype.getOffset = function () {
    return this._opts.offset;
  };
  /**
   *@ignore
   * 删除overlay，调用Map.removeOverlay时将调用此方法，
   * 将移除覆盖物的容器元素
   */
  InfoBox.prototype._remove = function () {
    var me = this;
    if (this.domElement && this.domElement.parentNode) {
      // 防止内存泄露
      baidu.event.un(this._div.firstChild, 'click', me._closeHandler());
      this.domElement.parentNode.removeChild(this.domElement);
    }
    this.domElement = null;
    this._isOpen = false;
    this.dispatchEvent('onremove');
  };
  baidu.object.extend(InfoBox.prototype, {
    /**
     * 获取关闭按钮的html
     * @return IMG 关闭按钮的HTML代码
     */
    _getCloseIcon: function _getCloseIcon() {
      var img = "<img src='" + this._opts.closeIconUrl + "' align='right' style='position:absolute;right:0px;cursor:pointer;margin:" + this._opts.closeIconMargin + "'/>";
      return img;
    },
    /**
     * 设置infoBox的内容
     * @param {String|HTMLElement} content 弹出气泡中的内容
     * @return none
     *
     * @example <b>参考示例：</b><br />
     * infoBox.setContent("百度地图API");
     */
    _setContent: function _setContent(content) {
      if (!this._div) {
        return;
      }
      var closeHtml = this._getCloseIcon();
      // string类型的content
      if (typeof content.nodeType === 'undefined') {
        this._div.innerHTML = closeHtml + content;
      } else {
        this._div.innerHTML = closeHtml;
        this._div.appendChild(content);
      }
      this._content = content;
      // 添加click关闭infobox事件
      this._addEventToClose();
    },
    /**
     * 调整infobox的position
     * @return none
     */
    _adjustPosition: function _adjustPosition(poi) {
      var pixel = this._getPointPosition(poi);
      var icon = this._marker && this._marker.getIcon();
      switch (this._opts.align) {
        case INFOBOX_AT_TOP:
          if (this._marker) {
            this._div.style.bottom = -(pixel.y - this._opts.offset.height - (!this._opts.ignoreMarkerSize ? icon.anchor.height - icon.infoWindowAnchor.height - this._marker.getOffset().height : 0)) + 2 + 'px';
          } else {
            this._div.style.bottom = -(pixel.y - this._opts.offset.height) + 'px';
          }
          break;
        case INFOBOX_AT_BOTTOM:
          if (this._marker) {
            this._div.style.top = pixel.y + this._opts.offset.height - (!this._opts.ignoreMarkerSize ? icon.anchor.height - icon.infoWindowAnchor.height - this._marker.getOffset().height : 0) + 'px';
          } else {
            this._div.style.top = pixel.y + this._opts.offset.height + 'px';
          }
          break;
      }

      if (this._marker) {
        this._div.style.left = pixel.x + this._opts.offset.width - (!this._opts.ignoreMarkerSize ? icon.anchor.width - this._marker.getOffset().width - icon.infoWindowAnchor.width : 0) - this._boxWidth / 2 + 'px';
      } else {
        this._div.style.left = pixel.x - this._opts.offset.width - this._boxWidth / 2 + 'px';
      }
    },
    /**
     * 得到infobox的position
     * @return Point  infobox当前的position
     */
    _getPointPosition: function _getPointPosition(poi) {
      this._pointPosition = this._map.pointToOverlayPixel(poi);
      return this._pointPosition;
    },
    /**
     * 得到infobox的高度跟宽度
     * @return none
     */
    _getInfoBoxSize: function _getInfoBoxSize() {
      this._boxWidth = parseInt(this._div.offsetWidth, 10);
      this._boxHeight = parseInt(this._div.offsetHeight, 10);
    },
    /**
     * 添加关闭事件
     * @return none
     */
    _addEventToClose: function _addEventToClose() {
      var me = this;
      baidu.event.on(this._div.firstChild, 'click', me._closeHandler());
      this._hasBindEventClose = true;
    },
    /**
     * 处理关闭事件
     * @return none
     */
    _closeHandler: function _closeHandler() {
      var me = this;
      return function (e) {
        me.close();
      };
    },
    /**
     * 阻止事件冒泡
     * @return none
     */
    _stopBubble: function _stopBubble(e) {
      if (e && e.stopPropagation) {
        e.stopPropagation();
      } else {
        window.event.cancelBubble = true;
      }
    },
    /**
     * 自动平移infobox，使其在视野中全部显示
     * @return none
     */
    _panBox: function _panBox() {
      if (!this._opts.enableAutoPan) {
        return;
      }
      var mapH = parseInt(this._map.getContainer().offsetHeight, 10);
      var mapW = parseInt(this._map.getContainer().offsetWidth, 10);
      var boxH = this._boxHeight;
      var boxW = this._boxWidth;
      // infobox窗口本身的宽度或者高度超过map container
      if (boxH >= mapH || boxW >= mapW) {
        return;
      }
      // 如果point不在可视区域内
      if (!this._map.getBounds().containsPoint(this._point)) {
        this._map.setCenter(this._point);
      }
      var anchorPos = this._map.pointToPixel(this._point);
      var panTop;
      var panBottom;
      var panY;
      var panX;
      // 左侧超出
      var panLeft = boxW / 2 - anchorPos.x;
      // 右侧超出
      var panRight = boxW / 2 + anchorPos.x - mapW;
      if (this._marker) {
        var icon = this._marker.getIcon();
      }
      // 基于bottom定位，也就是infoBox在上方的情况
      switch (this._opts.align) {
        case INFOBOX_AT_TOP:
          // 上侧超出
          var hTop = this._marker ? icon.anchor.height + this._marker.getOffset().height - icon.infoWindowAnchor.height : 0;
          panTop = boxH - anchorPos.y + this._opts.offset.height + hTop + 2;
          break;
        case INFOBOX_AT_BOTTOM:
          // 下侧超出
          var hBottom = this._marker ? -icon.anchor.height + icon.infoWindowAnchor.height + this._marker.getOffset().height + this._opts.offset.height : 0;
          panBottom = boxH + anchorPos.y - mapH + hBottom + 4;
          break;
      }

      panX = panLeft > 0 ? panLeft : panRight > 0 ? -panRight : 0;
      panY = panTop > 0 ? panTop : panBottom > 0 ? -panBottom : 0;
      this._map.panBy(panX, panY);
    },
    _removeMarkerEvt: function _removeMarkerEvt() {
      this._markerDragend && this._marker.removeEventListener('dragend', this._markerDragend);
      this._markerDragging && this._marker.removeEventListener('dragging', this._markerDragging);
      this._markerDragend = this._markerDragging = null;
    },
    /**
     * 集中派发事件函数
     *
     * @private
     * @param {Object} instance 派发事件的实例
     * @param {String} type 派发的事件名
     * @param {Json} opts 派发事件里添加的参数，可选
     */
    _dispatchEvent: function _dispatchEvent(instance, type, opts) {
      type.indexOf('on') !== 0 && (type = 'on' + type);
      var event = new baidu.lang.Event(type);
      if (opts) {
        for (var p in opts) {
          event[p] = opts[p];
        }
      }
      instance.dispatchEvent(event);
    }
  });
};
temp();