element-plus/lib/components/tree/src/model/useKeydown.js

A Component Library for Vue 3

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var vue = require('vue');
var aria = require('../../../../utils/aria.js');
var dom = require('../../../../utils/dom.js');

function useKeydown({ el$ }, store) {
  const treeItems = vue.shallowRef([]);
  const checkboxItems = vue.shallowRef([]);
  vue.onMounted(() => {
    initTabIndex();
    dom.on(el$.value, "keydown", handleKeydown);
  });
  vue.onBeforeUnmount(() => {
    dom.off(el$.value, "keydown", handleKeydown);
  });
  vue.onUpdated(() => {
    treeItems.value = Array.from(el$.value.querySelectorAll("[role=treeitem]"));
    checkboxItems.value = Array.from(el$.value.querySelectorAll("input[type=checkbox]"));
  });
  vue.watch(checkboxItems, (val) => {
    val.forEach((checkbox) => {
      checkbox.setAttribute("tabindex", "-1");
    });
  });
  const handleKeydown = (ev) => {
    const currentItem = ev.target;
    if (currentItem.className.indexOf("el-tree-node") === -1)
      return;
    const code = ev.code;
    treeItems.value = Array.from(el$.value.querySelectorAll(".is-focusable[role=treeitem]"));
    const currentIndex = treeItems.value.indexOf(currentItem);
    let nextIndex;
    if ([aria.EVENT_CODE.up, aria.EVENT_CODE.down].indexOf(code) > -1) {
      ev.preventDefault();
      if (code === aria.EVENT_CODE.up) {
        nextIndex = currentIndex === -1 ? 0 : currentIndex !== 0 ? currentIndex - 1 : treeItems.value.length - 1;
        const startIndex = nextIndex;
        while (true) {
          if (store.value.getNode(treeItems.value[nextIndex].dataset.key).canFocus)
            break;
          nextIndex--;
          if (nextIndex === startIndex) {
            nextIndex = -1;
            break;
          }
          if (nextIndex < 0) {
            nextIndex = treeItems.value.length - 1;
          }
        }
      } else {
        nextIndex = currentIndex === -1 ? 0 : currentIndex < treeItems.value.length - 1 ? currentIndex + 1 : 0;
        const startIndex = nextIndex;
        while (true) {
          if (store.value.getNode(treeItems.value[nextIndex].dataset.key).canFocus)
            break;
          nextIndex++;
          if (nextIndex === startIndex) {
            nextIndex = -1;
            break;
          }
          if (nextIndex >= treeItems.value.length) {
            nextIndex = 0;
          }
        }
      }
      nextIndex !== -1 && treeItems.value[nextIndex].focus();
    }
    if ([aria.EVENT_CODE.left, aria.EVENT_CODE.right].indexOf(code) > -1) {
      ev.preventDefault();
      currentItem.click();
    }
    const hasInput = currentItem.querySelector('[type="checkbox"]');
    if ([aria.EVENT_CODE.enter, aria.EVENT_CODE.space].indexOf(code) > -1 && hasInput) {
      ev.preventDefault();
      hasInput.click();
    }
  };
  const initTabIndex = () => {
    var _a;
    treeItems.value = Array.from(el$.value.querySelectorAll(".is-focusable[role=treeitem]"));
    checkboxItems.value = Array.from(el$.value.querySelectorAll("input[type=checkbox]"));
    const checkedItem = el$.value.querySelectorAll(".is-checked[role=treeitem]");
    if (checkedItem.length) {
      checkedItem[0].setAttribute("tabindex", "0");
      return;
    }
    (_a = treeItems.value[0]) == null ? void 0 : _a.setAttribute("tabindex", "0");
  };
}

exports.useKeydown = useKeydown;
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