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frontend/node_modules/rc-tabs/lib/hooks/useVisibleRange.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = useVisibleRange;
+var _react = require("react");
+var DEFAULT_SIZE = {
+  width: 0,
+  height: 0,
+  left: 0,
+  top: 0,
+  right: 0
+};
+function useVisibleRange(tabOffsets, visibleTabContentValue, transform, tabContentSizeValue, addNodeSizeValue, operationNodeSizeValue, _ref) {
+  var tabs = _ref.tabs,
+    tabPosition = _ref.tabPosition,
+    rtl = _ref.rtl;
+  var charUnit;
+  var position;
+  var transformSize;
+  if (['top', 'bottom'].includes(tabPosition)) {
+    charUnit = 'width';
+    position = rtl ? 'right' : 'left';
+    transformSize = Math.abs(transform);
+  } else {
+    charUnit = 'height';
+    position = 'top';
+    transformSize = -transform;
+  }
+  return (0, _react.useMemo)(function () {
+    if (!tabs.length) {
+      return [0, 0];
+    }
+    var len = tabs.length;
+    var endIndex = len;
+    for (var i = 0; i < len; i += 1) {
+      var offset = tabOffsets.get(tabs[i].key) || DEFAULT_SIZE;
+      if (Math.floor(offset[position] + offset[charUnit]) > Math.floor(transformSize + visibleTabContentValue)) {
+        endIndex = i - 1;
+        break;
+      }
+    }
+    var startIndex = 0;
+    for (var _i = len - 1; _i >= 0; _i -= 1) {
+      var _offset = tabOffsets.get(tabs[_i].key) || DEFAULT_SIZE;
+      if (_offset[position] < transformSize) {
+        startIndex = _i + 1;
+        break;
+      }
+    }
+    return startIndex > endIndex ? [0, -1] : [startIndex, endIndex];
+  }, [tabOffsets, visibleTabContentValue, tabContentSizeValue, addNodeSizeValue, operationNodeSizeValue, transformSize, tabPosition, tabs.map(function (tab) {
+    return tab.key;
+  }).join('_'), rtl]);
+}