cfc/cfc-frontend/utils/fontScale.js

export function readSystemFontScale() {
  try {
    if (typeof uni !== 'undefined' && uni.getAppBaseInfo) {
      const baseInfo = uni.getAppBaseInfo()
      if (baseInfo && typeof baseInfo.fontSizeScaleFactor === 'number' && !isNaN(baseInfo.fontSizeScaleFactor)) {
        return baseInfo.fontSizeScaleFactor
      }
      if (baseInfo && typeof baseInfo.fontSizeSetting === 'number' && !isNaN(baseInfo.fontSizeSetting)) {
        const scale = baseInfo.fontSizeSetting / 16
        if (scale > 0) {
          return scale
        }
      }
    }
  } catch (e) {
    // ignore
  }
  try {
    if (typeof wx !== 'undefined' && wx.getAppBaseInfo) {
      const baseInfo = wx.getAppBaseInfo()
      if (baseInfo && typeof baseInfo.fontSizeScaleFactor === 'number' && !isNaN(baseInfo.fontSizeScaleFactor)) {
        return baseInfo.fontSizeScaleFactor
      }
      if (baseInfo && typeof baseInfo.fontSizeSetting === 'number' && !isNaN(baseInfo.fontSizeSetting)) {
        const scale = baseInfo.fontSizeSetting / 16
        if (scale > 0) {
          return scale
        }
      }
    }
  } catch (e) {
    // ignore
  }
  return 1
}

export function getFontScale() {
  try {
    const stored = uni.getStorageSync('fontSizeScaleFactor')
    if (typeof stored === 'number' && !isNaN(stored) && stored > 0) {
      let scale = stored
      if (scale < 0.9) scale = 0.9
      if (scale > 1.7) scale = 1.7
      const rounded = Math.round(scale * 100) / 100
      return rounded
    }
  } catch (e) {
    // ignore
  }
  const systemScale = readSystemFontScale()
  let scale = systemScale
  if (isNaN(scale) || scale <= 0) {
    scale = 1
  }
  if (scale < 0.9) scale = 0.9
  if (scale > 1.7) scale = 1.7
  const rounded = Math.round(scale * 100) / 100
  return rounded
}

export function syncFontScale() {
  const systemScale = readSystemFontScale()
  let scale = systemScale
  if (isNaN(scale) || scale <= 0) {
    scale = 1
  }
  if (scale < 0.9) scale = 0.9
  if (scale > 1.7) scale = 1.7
  const rounded = Math.round(scale * 100) / 100
  try {
    uni.setStorageSync('fontSizeScaleFactor', rounded)
  } catch (e) {
    // ignore
  }
  return rounded
}