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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*/
'use strict';
var CSSProperty = require('./CSSProperty');
var warning = require('fbjs/lib/warning');
var isUnitlessNumber = CSSProperty.isUnitlessNumber;
var styleWarnings = {};
/**
* Convert a value into the proper css writable value. The style name `name`
* should be logical (no hyphens), as specified
* in `CSSProperty.isUnitlessNumber`.
*
* @param {string} name CSS property name such as `topMargin`.
* @param {*} value CSS property value such as `10px`.
* @param {ReactDOMComponent} component
* @return {string} Normalized style value with dimensions applied.
*/
function dangerousStyleValue(name, value, component, isCustomProperty) {
// Note that we've removed escapeTextForBrowser() calls here since the
// whole string will be escaped when the attribute is injected into
// the markup. If you provide unsafe user data here they can inject
// arbitrary CSS which may be problematic (I couldn't repro this):
// https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
// http://www.thespanner.co.uk/2007/11/26/ultimate-xss-css-injection/
// This is not an XSS hole but instead a potential CSS injection issue
// which has lead to a greater discussion about how we're going to
// trust URLs moving forward. See #2115901
var isEmpty = value == null || typeof value === 'boolean' || value === '';
if (isEmpty) {
return '';
}
var isNonNumeric = isNaN(value);
if (isCustomProperty || isNonNumeric || value === 0 || isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name]) {
return '' + value; // cast to string
}
if (typeof value === 'string') {
if (process.env.NODE_ENV !== 'production') {
// Allow '0' to pass through without warning. 0 is already special and
// doesn't require units, so we don't need to warn about it.
if (component && value !== '0') {
var owner = component._currentElement._owner;
var ownerName = owner ? owner.getName() : null;
if (ownerName && !styleWarnings[ownerName]) {
styleWarnings[ownerName] = {};
}
var warned = false;
if (ownerName) {
var warnings = styleWarnings[ownerName];
warned = warnings[name];
if (!warned) {
warnings[name] = true;
}
}
if (!warned) {
process.env.NODE_ENV !== 'production' ? warning(false, 'a `%s` tag (owner: `%s`) was passed a numeric string value ' + 'for CSS property `%s` (value: `%s`) which will be treated ' + 'as a unitless number in a future version of React.', component._currentElement.type, ownerName || 'unknown', name, value) : void 0;
}
}
}
value = value.trim();
}
return value + 'px';
}
module.exports = dangerousStyleValue;
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