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extensions/Excel转JSON/node_modules/node-xlsx/lib/helpers.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+exports.__esModule = true;
+exports.buildSheetFromMatrix = exports.buildExcelDate = exports.isCellDescriptor = exports.isObject = exports.isString = exports.isNumber = exports.isBoolean = void 0;
+
+var _xlsx = _interopRequireDefault(require("xlsx"));
+
+var ORIGIN_DATE = new Date(Date.UTC(1899, 11, 30));
+
+var isBoolean = function isBoolean(maybeBoolean) {
+  return typeof maybeBoolean === 'boolean';
+};
+
+exports.isBoolean = isBoolean;
+
+var isNumber = function isNumber(maybeNumber) {
+  return typeof maybeNumber === 'number';
+};
+
+exports.isNumber = isNumber;
+
+var isString = function isString(maybeString) {
+  return typeof maybeString === 'string';
+};
+
+exports.isString = isString;
+
+var isObject = function isObject(maybeObject) {
+  return maybeObject !== null && typeof maybeObject === 'object';
+};
+
+exports.isObject = isObject;
+
+var isCellDescriptor = function isCellDescriptor(maybeCell) {
+  return isObject(maybeCell) && 'v' in maybeCell;
+};
+
+exports.isCellDescriptor = isCellDescriptor;
+
+var buildExcelDate = function buildExcelDate(value, is1904) {
+  var epoch = Date.parse(value + (is1904 ? 1462 : 0));
+  return (epoch - ORIGIN_DATE) / 864e5;
+};
+
+exports.buildExcelDate = buildExcelDate;
+
+var buildSheetFromMatrix = function buildSheetFromMatrix(data, options) {
+  if (options === void 0) {
+    options = {};
+  }
+
+  var workSheet = {};
+  var range = {
+    s: {
+      c: 1e7,
+      r: 1e7
+    },
+    e: {
+      c: 0,
+      r: 0
+    }
+  };
+  if (!Array.isArray(data)) throw new Error('sheet data is not array');
+
+  for (var R = 0; R !== data.length; R += 1) {
+    for (var C = 0; C !== data[R].length; C += 1) {
+      if (!Array.isArray(data[R])) throw new Error(`${R}th row data is not array`);
+      if (range.s.r > R) range.s.r = R;
+      if (range.s.c > C) range.s.c = C;
+      if (range.e.r < R) range.e.r = R;
+      if (range.e.c < C) range.e.c = C;
+
+      if (data[R][C] === null) {
+        continue; // eslint-disable-line
+      }
+
+      var cell = isCellDescriptor(data[R][C]) ? data[R][C] : {
+        v: data[R][C]
+      };
+
+      var cellRef = _xlsx.default.utils.encode_cell({
+        c: C,
+        r: R
+      });
+
+      if (isNumber(cell.v)) {
+        cell.t = 'n';
+      } else if (isBoolean(cell.v)) {
+        cell.t = 'b';
+      } else if (cell.v instanceof Date) {
+        cell.t = 'n';
+        cell.v = buildExcelDate(cell.v);
+        cell.z = cell.z || _xlsx.default.SSF._table[14]; // eslint-disable-line no-underscore-dangle
+
+        /* eslint-disable spaced-comment, no-trailing-spaces */
+
+        /***
+         * Allows for an non-abstracted representation of the data
+         *
+         * example: {t:'n', z:10, f:'=AVERAGE(A:A)'}
+         *
+         * Documentation:
+         * - Cell Object: https://sheetjs.gitbooks.io/docs/#cell-object
+         * - Data Types: https://sheetjs.gitbooks.io/docs/#data-types
+         * - Format: https://sheetjs.gitbooks.io/docs/#number-formats
+         **/
+
+        /* eslint-disable spaced-comment, no-trailing-spaces */
+      } else if (isObject(cell.v)) {
+        cell.t = cell.v.t;
+        cell.f = cell.v.f;
+        cell.F = cell.v.F;
+        cell.z = cell.v.z;
+      } else {
+        cell.t = 's';
+      }
+
+      if (isNumber(cell.z)) cell.z = _xlsx.default.SSF._table[cell.z]; // eslint-disable-line no-underscore-dangle
+
+      workSheet[cellRef] = cell;
+    }
+  }
+
+  if (range.s.c < 1e7) {
+    workSheet['!ref'] = _xlsx.default.utils.encode_range(range);
+  }
+
+  if (options['!cols']) {
+    workSheet['!cols'] = options['!cols'];
+  }
+
+  if (options['!merges']) {
+    workSheet['!merges'] = options['!merges'];
+  }
+
+  return workSheet;
+};
+
+exports.buildSheetFromMatrix = buildSheetFromMatrix;
+//# sourceMappingURL=helpers.js.map