@pisell/layout/lib/utils/index.js

基于 Fusion 设计系统的自然布局体系

"use strict";

exports.__esModule = true;
exports.getCurBreakPoint = getCurBreakPoint;
exports.getGapVal = getGapVal;
exports.getMaxNumberOfColumns = getMaxNumberOfColumns;
exports.isPresetSize = isPresetSize;
exports.isValidGap = isValidGap;
exports.wrapUnit = wrapUnit;
var _lodashEs = require("lodash-es");
var _constant = require("../common/constant");
/**
 * 获取当前屏幕断点
 * @param breakPoints
 */
function getCurBreakPoint(breakPoints) {
  var screenWidths = [];
  var tmpMap = {};
  var availWidth = document.body.clientWidth;
  breakPoints.forEach(function (bp) {
    var width = bp.width;
    screenWidths.push(width);
    tmpMap[width] = bp;
  });
  screenWidths = screenWidths.sort(function (a, b) {
    return a - b;
  });
  var len = screenWidths.length;
  var ret = tmpMap[screenWidths[0]];
  if (availWidth > screenWidths[len - 1]) {
    ret = tmpMap[screenWidths[len - 1]];
  } else {
    for (var i = 1; i < len; i++) {
      var breakPoint = tmpMap[screenWidths[i]];
      if (screenWidths[i - 1] <= availWidth && availWidth < screenWidths[i]) {
        ret = breakPoint;
      }
    }
  }
  return ret;
}

/**
 * 获取最大断点列数
 */
function getMaxNumberOfColumns(breakPoints) {
  if (breakPoints === void 0) {
    breakPoints = _constant.DEFAULT_BREAK_POINTS;
  }
  var screenWidths = breakPoints.map(function (bp) {
    return bp.width;
  });
  var maxWidth = Math.max.apply(Math, screenWidths);
  var bp = breakPoints.find(function (breakPoint) {
    return (breakPoint === null || breakPoint === void 0 ? void 0 : breakPoint.width) === maxWidth;
  });
  return (bp === null || bp === void 0 ? void 0 : bp.numberOfColumns) || 12;
}

/**
 * 是否为标准的预设尺寸
 * @param val
 */
function isPresetSize(val) {
  return ['small', 'medium', 'large'].includes(val);
}

/**
 * 为数值包裹自动单位
 * eg:
 *  wrapUnit(2) -> 2px
 *  wrapUnit('2em') -> 2em
 * @param value
 * @param unit
 */
function wrapUnit(value, unit) {
  if (unit === void 0) {
    unit = 'px';
  }
  return (0, _lodashEs.isNumber)(value) ? "" + value + unit : value;
}

/**
 * 是否为一个有效的 gap 值:
 * eg: 0.9 / -9px / auto
 * @param val
 */
function isValidGap(val) {
  var gapValReg = /^-?[0-9]*\.?[0-9]+([a-z|A-z]*)$/;
  return (0, _lodashEs.isNumber)(val) || (0, _lodashEs.isString)(val) && (gapValReg.test(val) || val === 'auto');
}

/**
 * 获取最终的 gap 值
 * @param contextGap 上下文中的 gap 值
 * @param propGap 属性中定义的 gap 值
 */
function getGapVal(contextGap, propGap) {
  if (isValidGap(propGap)) {
    return wrapUnit(propGap);
  } else if (isValidGap(contextGap)) {
    return wrapUnit(contextGap);
  }
  return undefined;
}