gas-cylinder-app/unpackage/dist/dev/mp-weixin/node-modules/uview-ui/components/u-sticky/u-sticky.js

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/***/ 281:
/*!************************************************************************************************!*\
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/***/ (function(module, __webpack_exports__, __webpack_require__) {

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var renderjs





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component.options.__file = "node_modules/uview-ui/components/u-sticky/u-sticky.vue"
/* harmony default export */ __webpack_exports__["default"] = (component.exports);

/***/ }),

/***/ 282:
/*!*******************************************************************************************************************************************!*\
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/*! exports provided: render, staticRenderFns, recyclableRender, components */
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/***/ }),

/***/ 283:
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/*! exports provided: render, staticRenderFns, recyclableRender, components */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

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var components
var render = function () {
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    }
  )
}
var recyclableRender = false
var staticRenderFns = []
render._withStripped = true



/***/ }),

/***/ 284:
/*!*************************************************************************************************************************!*\
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/***/ 285:
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"use strict";
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var _interopRequireDefault = __webpack_require__(/*! @babel/runtime/helpers/interopRequireDefault */ 4);
Object.defineProperty(exports, "__esModule", {
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});
exports.default = void 0;
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//
//
//
//
//
//
//
//
//
//
//
//
//
//
//

;
/**
 * sticky 吸顶
 * @description 该组件与CSS中position: sticky属性实现的效果一致，当组件达到预设的到顶部距离时， 就会固定在指定位置，组件位置大于预设的顶部距离时，会重新按照正常的布局排列。
 * @tutorial https://www.uviewui.com/components/sticky.html
 * @property {String ｜ Number}	offsetTop		吸顶时与顶部的距离，单位px（默认 0 ）
 * @property {String ｜ Number}	customNavHeight	自定义导航栏的高度 （h5 默认44  其他默认 0 ）
 * @property {Boolean}			disabled		是否开启吸顶功能 （默认 false ）
 * @property {String}			bgColor			组件背景颜色（默认 '#ffffff' ）
 * @property {String ｜ Number}	zIndex			吸顶时的z-index值
 * @property {String ｜ Number}	index			自定义标识，用于区分是哪一个组件
 * @property {Object}			customStyle		组件的样式，对象形式
 * @event {Function} fixed		组件吸顶时触发
 * @event {Function} unfixed	组件取消吸顶时触发
 * @example <u-sticky offsetTop="200"><view>塞下秋来风景异，衡阳雁去无留意</view></u-sticky>
 */
var _default = {
  name: 'u-sticky',
  mixins: [uni.$u.mpMixin, uni.$u.mixin, _props.default],
  data: function data() {
    return {
      cssSticky: false,
      // 是否使用css的sticky实现
      stickyTop: 0,
      // 吸顶的top值，因为可能受自定义导航栏影响，最终的吸顶值非offsetTop值
      elId: uni.$u.guid(),
      left: 0,
      // js模式时，吸顶的内容因为处于postition: fixed模式，为了和原来保持一致的样式，需要记录并重新设置它的left，height，width属性
      width: 'auto',
      height: 'auto',
      fixed: false // js模式时，是否处于吸顶模式
    };
  },

  computed: {
    style: function style() {
      var style = {};
      if (!this.disabled) {
        if (this.cssSticky) {
          style.position = 'sticky';
          style.zIndex = this.uZindex;
          style.top = uni.$u.addUnit(this.stickyTop);
        } else {
          style.height = this.fixed ? this.height + 'px' : 'auto';
        }
      } else {
        // 无需吸顶时，设置会默认的relative(nvue)和非nvue的static静态模式即可

        style.position = 'static';
      }
      style.backgroundColor = this.bgColor;
      return uni.$u.deepMerge(uni.$u.addStyle(this.customStyle), style);
    },
    // 吸顶内容的样式
    stickyContent: function stickyContent() {
      var style = {};
      if (!this.cssSticky) {
        style.position = this.fixed ? 'fixed' : 'static';
        style.top = this.stickyTop + 'px';
        style.left = this.left + 'px';
        style.width = this.width == 'auto' ? 'auto' : this.width + 'px';
        style.zIndex = this.uZindex;
      }
      return style;
    },
    uZindex: function uZindex() {
      return this.zIndex ? this.zIndex : uni.$u.zIndex.sticky;
    }
  },
  mounted: function mounted() {
    this.init();
  },
  methods: {
    init: function init() {
      this.getStickyTop();
      // 判断使用的模式
      this.checkSupportCssSticky();
      // 如果不支持css sticky，则使用js方案，此方案性能比不上css方案
      if (!this.cssSticky) {
        !this.disabled && this.initObserveContent();
      }
    },
    initObserveContent: function initObserveContent() {
      var _this = this;
      // 获取吸顶内容的高度，用于在js吸顶模式时，给父元素一个填充高度，防止"塌陷"
      this.$uGetRect('#' + this.elId).then(function (res) {
        _this.height = res.height;
        _this.left = res.left;
        _this.width = res.width;
        _this.$nextTick(function () {
          _this.observeContent();
        });
      });
    },
    observeContent: function observeContent() {
      var _this2 = this;
      // 先断掉之前的观察
      this.disconnectObserver('contentObserver');
      var contentObserver = uni.createIntersectionObserver({
        // 检测的区间范围
        thresholds: [0.95, 0.98, 1]
      });
      // 到屏幕顶部的高度时触发
      contentObserver.relativeToViewport({
        top: -this.stickyTop
      });
      // 绑定观察的元素
      contentObserver.observe("#".concat(this.elId), function (res) {
        _this2.setFixed(res.boundingClientRect.top);
      });
      this.contentObserver = contentObserver;
    },
    setFixed: function setFixed(top) {
      // 判断是否出于吸顶条件范围
      var fixed = top <= this.stickyTop;
      this.fixed = fixed;
    },
    disconnectObserver: function disconnectObserver(observerName) {
      // 断掉观察，释放资源
      var observer = this[observerName];
      observer && observer.disconnect();
    },
    getStickyTop: function getStickyTop() {
      this.stickyTop = uni.$u.getPx(this.offsetTop) + uni.$u.getPx(this.customNavHeight);
    },
    checkSupportCssSticky: function checkSupportCssSticky() {
      var _this3 = this;
      return (0, _asyncToGenerator2.default)( /*#__PURE__*/_regenerator.default.mark(function _callee() {
        return _regenerator.default.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                // 如果安卓版本高于8.0，依然认为是支持css sticky的(因为安卓7在某些机型，可能不支持sticky)
                if (uni.$u.os() === 'android' && Number(uni.$u.sys().system) > 8) {
                  _this3.cssSticky = true;
                }

                // APP-Vue和微信平台，通过computedStyle判断是否支持css sticky
                _context.next = 3;
                return _this3.checkComputedStyle();
              case 3:
                _this3.cssSticky = _context.sent;
                // ios上，从ios6开始，都是支持css sticky的
                if (uni.$u.os() === 'ios') {
                  _this3.cssSticky = true;
                }

                // nvue，是支持css sticky的
              case 5:
              case "end":
                return _context.stop();
            }
          }
        }, _callee);
      }))();
    },
    // 在APP和微信小程序上，通过uni.createSelectorQuery可以判断是否支持css sticky
    checkComputedStyle: function checkComputedStyle() {
      var _this4 = this;
      // 方法内进行判断，避免在其他平台生成无用代码

      return new Promise(function (resolve) {
        uni.createSelectorQuery().in(_this4).select('.u-sticky').fields({
          computedStyle: ["position"]
        }).exec(function (e) {
          resolve('sticky' === e[0].position);
        });
      });
    },
    // H5通过创建元素的形式嗅探是否支持css sticky
    // 判断浏览器是否支持sticky属性
    checkCssStickyForH5: function checkCssStickyForH5() {
      // 方法内进行判断，避免在其他平台生成无用代码
    }
  },
  beforeDestroy: function beforeDestroy() {
    this.disconnectObserver('contentObserver');
  }
};
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/***/ 287:
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