jtBaseApp/node_modules/vant/lib/lazyload/vue-lazyload/lazy-image.js

var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var stdin_exports = {};
__export(stdin_exports, {
  default: () => stdin_default
});
module.exports = __toCommonJS(stdin_exports);
var import_use = require("@vant/use");
var import_util = require("./util");
var import_utils = require("../../utils");
var import_vue = require("vue");
var stdin_default = (lazyManager) => ({
  props: {
    src: [String, Object],
    tag: {
      type: String,
      default: "img"
    }
  },
  render() {
    var _a, _b;
    return (0, import_vue.h)(
      this.tag,
      {
        src: this.renderSrc
      },
      (_b = (_a = this.$slots).default) == null ? void 0 : _b.call(_a)
    );
  },
  data() {
    return {
      el: null,
      options: {
        src: "",
        error: "",
        loading: "",
        attempt: lazyManager.options.attempt
      },
      state: {
        loaded: false,
        error: false,
        attempt: 0
      },
      renderSrc: ""
    };
  },
  watch: {
    src() {
      this.init();
      lazyManager.addLazyBox(this);
      lazyManager.lazyLoadHandler();
    }
  },
  created() {
    this.init();
    this.renderSrc = this.options.loading;
  },
  mounted() {
    this.el = this.$el;
    lazyManager.addLazyBox(this);
    lazyManager.lazyLoadHandler();
  },
  beforeUnmount() {
    lazyManager.removeComponent(this);
  },
  methods: {
    init() {
      const { src, loading, error } = lazyManager.valueFormatter(this.src);
      this.state.loaded = false;
      this.options.src = src;
      this.options.error = error;
      this.options.loading = loading;
      this.renderSrc = this.options.loading;
    },
    checkInView() {
      const rect = (0, import_use.useRect)(this.$el);
      return rect.top < window.innerHeight * lazyManager.options.preLoad && rect.bottom > 0 && rect.left < window.innerWidth * lazyManager.options.preLoad && rect.right > 0;
    },
    load(onFinish = import_utils.noop) {
      if (this.state.attempt > this.options.attempt - 1 && this.state.error) {
        if (process.env.NODE_ENV !== "production" && !lazyManager.options.silent) {
          console.log(
            `[@vant/lazyload] ${this.options.src} tried too more than ${this.options.attempt} times`
          );
        }
        onFinish();
        return;
      }
      const { src } = this.options;
      (0, import_util.loadImageAsync)(
        { src },
        ({ src: src2 }) => {
          this.renderSrc = src2;
          this.state.loaded = true;
        },
        () => {
          this.state.attempt++;
          this.renderSrc = this.options.error;
          this.state.error = true;
        }
      );
    }
  }
});