react-native/Libraries/StyleSheet/StyleSheetValidation.js

/**
 * Copyright 2004-present Facebook. All Rights Reserved.
 *
 * @providesModule StyleSheetValidation
 */
'use strict';

var ImageStylePropTypes = require('ImageStylePropTypes');
var ReactPropTypeLocations = require('ReactPropTypeLocations');
var TextStylePropTypes = require('TextStylePropTypes');
var ViewStylePropTypes = require('ViewStylePropTypes');

var invariant = require('invariant');

class StyleSheetValidation {
  static validateStyleProp(prop, style, caller) {
    if (!__DEV__) {
      return;
    }
    if (allStylePropTypes[prop] === undefined) {
      var message1 = '"' + prop + '" is not a valid style property.';
      var message2 = '\nValid style props: ' +
        JSON.stringify(Object.keys(allStylePropTypes), null, '  ');
      styleError(message1, style, caller, message2);
    }
    var error = allStylePropTypes[prop](
      style,
      prop,
      caller,
      ReactPropTypeLocations.prop
    );
    if (error) {
      styleError(error.message, style, caller);
    }
  }

  static validateStyle(name, styles) {
    if (!__DEV__) {
      return;
    }
    for (var prop in styles[name]) {
      StyleSheetValidation.validateStyleProp(prop, styles[name], 'StyleSheet ' + name);
    }
  }

  static addValidStylePropTypes(stylePropTypes) {
    for (var key in stylePropTypes) {
      invariant(
        allStylePropTypes[key] === undefined ||
          allStylePropTypes[key] === stylePropTypes[key],
        'Attemped to redefine existing style prop type "' + key + '".'
      );
      allStylePropTypes[key] = stylePropTypes[key];
    }
  }
}

var styleError = function(message1, style, caller, message2) {
  invariant(
    false,
    message1 + '\n' + (caller || '<<unknown>>') + ': ' +
    JSON.stringify(style, null, '  ') + (message2 || '')
  );
};

var allStylePropTypes = {};

StyleSheetValidation.addValidStylePropTypes(ImageStylePropTypes);
StyleSheetValidation.addValidStylePropTypes(TextStylePropTypes);
StyleSheetValidation.addValidStylePropTypes(ViewStylePropTypes);

module.exports = StyleSheetValidation;