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node_modules/element-plus/lib/components/affix/src/affix2.js

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+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var vue = require('vue');
+var core = require('@vueuse/core');
+var affix = require('./affix.js');
+var pluginVue_exportHelper = require('../../../_virtual/plugin-vue_export-helper.js');
+var index = require('../../../hooks/use-namespace/index.js');
+var scroll = require('../../../utils/dom/scroll.js');
+var style = require('../../../utils/dom/style.js');
+var event = require('../../../constants/event.js');
+var error = require('../../../utils/error.js');
+
+const COMPONENT_NAME = "ElAffix";
+const __default__ = vue.defineComponent({
+  name: COMPONENT_NAME
+});
+const _sfc_main = /* @__PURE__ */ vue.defineComponent({
+  ...__default__,
+  props: affix.affixProps,
+  emits: affix.affixEmits,
+  setup(__props, { expose, emit }) {
+    const props = __props;
+    const ns = index.useNamespace("affix");
+    const target = vue.shallowRef();
+    const root = vue.shallowRef();
+    const scrollContainer = vue.shallowRef();
+    const { height: windowHeight } = core.useWindowSize();
+    const {
+      height: rootHeight,
+      width: rootWidth,
+      top: rootTop,
+      bottom: rootBottom,
+      update: updateRoot
+    } = core.useElementBounding(root, { windowScroll: false });
+    const targetRect = core.useElementBounding(target);
+    const fixed = vue.ref(false);
+    const scrollTop = vue.ref(0);
+    const transform = vue.ref(0);
+    const rootStyle = vue.computed(() => {
+      return {
+        height: fixed.value ? `${rootHeight.value}px` : "",
+        width: fixed.value ? `${rootWidth.value}px` : ""
+      };
+    });
+    const affixStyle = vue.computed(() => {
+      if (!fixed.value)
+        return {};
+      const offset = props.offset ? style.addUnit(props.offset) : 0;
+      return {
+        height: `${rootHeight.value}px`,
+        width: `${rootWidth.value}px`,
+        top: props.position === "top" ? offset : "",
+        bottom: props.position === "bottom" ? offset : "",
+        transform: transform.value ? `translateY(${transform.value}px)` : "",
+        zIndex: props.zIndex
+      };
+    });
+    const update = () => {
+      if (!scrollContainer.value)
+        return;
+      scrollTop.value = scrollContainer.value instanceof Window ? document.documentElement.scrollTop : scrollContainer.value.scrollTop || 0;
+      const { position, target: target2, offset } = props;
+      const rootHeightOffset = offset + rootHeight.value;
+      if (position === "top") {
+        if (target2) {
+          const difference = targetRect.bottom.value - rootHeightOffset;
+          fixed.value = offset > rootTop.value && targetRect.bottom.value > 0;
+          transform.value = difference < 0 ? difference : 0;
+        } else {
+          fixed.value = offset > rootTop.value;
+        }
+      } else if (target2) {
+        const difference = windowHeight.value - targetRect.top.value - rootHeightOffset;
+        fixed.value = windowHeight.value - offset < rootBottom.value && windowHeight.value > targetRect.top.value;
+        transform.value = difference < 0 ? -difference : 0;
+      } else {
+        fixed.value = windowHeight.value - offset < rootBottom.value;
+      }
+    };
+    const handleScroll = async () => {
+      updateRoot();
+      await vue.nextTick();
+      emit("scroll", {
+        scrollTop: scrollTop.value,
+        fixed: fixed.value
+      });
+    };
+    vue.watch(fixed, (val) => emit(event.CHANGE_EVENT, val));
+    vue.onMounted(() => {
+      var _a;
+      if (props.target) {
+        target.value = (_a = document.querySelector(props.target)) != null ? _a : void 0;
+        if (!target.value)
+          error.throwError(COMPONENT_NAME, `Target does not exist: ${props.target}`);
+      } else {
+        target.value = document.documentElement;
+      }
+      scrollContainer.value = scroll.getScrollContainer(root.value, true);
+      updateRoot();
+    });
+    core.useEventListener(scrollContainer, "scroll", handleScroll);
+    vue.watchEffect(update);
+    expose({
+      update,
+      updateRoot
+    });
+    return (_ctx, _cache) => {
+      return vue.openBlock(), vue.createElementBlock("div", {
+        ref_key: "root",
+        ref: root,
+        class: vue.normalizeClass(vue.unref(ns).b()),
+        style: vue.normalizeStyle(vue.unref(rootStyle))
+      }, [
+        vue.createElementVNode("div", {
+          class: vue.normalizeClass({ [vue.unref(ns).m("fixed")]: fixed.value }),
+          style: vue.normalizeStyle(vue.unref(affixStyle))
+        }, [
+          vue.renderSlot(_ctx.$slots, "default")
+        ], 6)
+      ], 6);
+    };
+  }
+});
+var Affix = /* @__PURE__ */ pluginVue_exportHelper["default"](_sfc_main, [["__file", "affix.vue"]]);
+
+exports["default"] = Affix;
+//# sourceMappingURL=affix2.js.map