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video-gen-admin/node_modules/@rc-component/tabs/lib/hooks/useVisibleRange.js

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