style-it
Version:
Component for writing plaintext CSS in React apps -- isomorphic, scoped, FOUC-free, fully featured, CSS-in-JS
629 lines (511 loc) • 26.6 kB
JavaScript
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory(require("react"));
else if(typeof define === 'function' && define.amd)
define(["react"], factory);
else if(typeof exports === 'object')
exports["Style"] = factory(require("react"));
else
root["Style"] = factory(root["React"]);
})(this, function(__WEBPACK_EXTERNAL_MODULE_2__) {
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/* 0 */
/***/ function(module, exports, __webpack_require__) {
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _react = __webpack_require__(2);
var _react2 = _interopRequireDefault(_react);
var _reactLibAdler = __webpack_require__(1);
var _reactLibAdler2 = _interopRequireDefault(_reactLibAdler);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**
* Copyright 2016-present, Joshua Robinson
* All rights reserved.
*
* This source code is licensed under the MIT license.
*
*/
var __DEV__ = ("production") !== 'production';
var Style = function (_Component) {
_inherits(Style, _Component);
function Style(props) {
_classCallCheck(this, Style);
var _this = _possibleConstructorReturn(this, (Style.__proto__ || Object.getPrototypeOf(Style)).call(this, props));
_this.getStyleString = function () {
if (_this.props.children instanceof Array) {
var styleString = _this.props.children.filter(function (child) {
return !(0, _react.isValidElement)(child) && typeof child === 'string';
});
if (styleString.length > 1) {
throw new Error('Multiple style objects as direct descedents of a ' + 'Style component are not supported (' + styleString.length + ' style objects detected): \n\n' + styleString[0]);
}
return styleString[0];
} else if (typeof _this.props.children === 'string' && !(0, _react.isValidElement)(_this.props.children)) {
return _this.props.children;
} else {
return null;
}
};
_this.getRootElement = function () {
if (_this.props.children instanceof Array) {
var rootElement = _this.props.children.filter(function (child) {
return (0, _react.isValidElement)(child);
});
if (__DEV__) {
if (rootElement.length > 1) {
console.log(rootElement);
throw new Error('Adjacent JSX elements must be wrapped in an enclosing tag (' + rootElement.length + ' root elements detected).');
}
if (typeof rootElement[0] !== 'undefined' && _this.isVoidElement(rootElement[0].type)) {
throw new Error('Self-closing void elements like ' + rootElement.type + ' must be wrapped ' + 'in an enclosing tag. Reactive Style must be able to nest a style element ' + 'inside of the root element and void element content models never allow' + 'it to have contents under any circumstances.');
}
}
return rootElement[0];
} else if ((0, _react.isValidElement)(_this.props.children)) {
return _this.props.children;
} else {
return null;
}
};
_this.getRootSelectors = function (rootElement) {
var rootSelectors = [];
// Handle id
if (rootElement.props.id) {
rootSelectors.push('#' + rootElement.props.id);
}
// Handle classes
if (rootElement.props.className) {
rootElement.props.className.trim().split(/\s+/g).forEach(function (className) {
return rootSelectors.push(className);
});
}
// Handle no root selector by using type
if (!rootSelectors.length && typeof rootElement.type !== 'function') {
rootSelectors.push(rootElement.type);
}
return rootSelectors;
};
_this.processCSSText = function (styleString, scopeClassName, rootSelectors) {
// TODO: Look into using memoizeStringOnly from fbjs/lib for escaped strings;
// can avoid much of the computation as long as scoped doesn't come into play
// which would be unique
// TODO: If dev lint and provide feedback
// if linting fails we need to error out because
// the style string will not be parsed correctly
return styleString.replace(/\s*\/\/(?![^(]*\)).*|\s*\/\*.*\*\//g, '') // Strip javascript style comments
.replace(/\s\s+/g, ' ') // Convert multiple to single whitespace
.split('}') // Start breaking down statements
.map(function (fragment) {
var isDeclarationBodyPattern = /.*:.*;/g;
var isLastItemDeclarationBodyPattern = /.*:.*(;|$|\s+)/g;
var isAtRulePattern = /\s*@/g;
var isKeyframeOffsetPattern = /\s*(([0-9][0-9]?|100)\s*%)|\s*(to|from)\s*$/g;
// Split fragment into selector and declarationBody; escape declaration body
return fragment.split('{').map(function (statement, i, arr) {
// Avoid processing whitespace
if (!statement.trim().length) {
return '';
}
var isDeclarationBodyItemWithOptionalSemicolon =
// Only for the last property-value in a
// CSS declaration body is a semicolon optional
arr.length - 1 === i && statement.match(isLastItemDeclarationBodyPattern);
// Skip escaping selectors statements since that would break them;
// note in docs that selector statements are not escaped and should
// not be generated from user provided strings
if (statement.match(isDeclarationBodyPattern) || isDeclarationBodyItemWithOptionalSemicolon) {
return _this.escapeTextContentForBrowser(statement);
} else {
// Statement is a selector
var selector = statement;
if (scopeClassName && !/:target/gi.test(selector)) {
// Prefix the scope to the selector if it is not an at-rule
if (!selector.match(isAtRulePattern) && !selector.match(isKeyframeOffsetPattern)) {
return _this.scopeSelector(scopeClassName, selector, rootSelectors);
} else {
// Is at-rule or keyframe offset and should not be scoped
return selector;
}
} else {
// No scope; do nothing to the selector
return selector;
}
}
// Pretty print in dev
}).join('{\n');
}).join('}\n');
};
_this.escaper = function (match) {
var ESCAPE_LOOKUP = {
'>': '>',
'<': '<'
};
return ESCAPE_LOOKUP[match];
};
_this.escapeTextContentForBrowser = function (text) {
var ESCAPE_REGEX = /[><]/g;
return ('' + text).replace(ESCAPE_REGEX, _this.escaper);
};
_this.scopeSelector = function (scopeClassName, selector, rootSelectors) {
var scopedSelector = [];
// Matches comma-delimiters in multi-selectors (".fooClass, .barClass {...}" => "," );
// ignores commas-delimiters inside of brackets and parenthesis ([attr=value], :not()..)
var groupOfSelectorsPattern = /,(?![^(|[]*\)|\])/g;
var selectors = selector.split(groupOfSelectorsPattern);
for (var i = 0; i < selectors.length; i++) {
var containsSelector = void 0; // [data-scoped="54321"] .someClass
var unionSelector = void 0; // [data-scoped="54321"].someClass (account for root)
if (rootSelectors.length && rootSelectors.some(function (rootSelector) {
return selector.match(rootSelector);
})) {
unionSelector = selectors[i];
// Can't just add them together because of selector combinator complexity
// like '.rootClassName.someClass.otherClass > *' or :not('.rootClassName'),
// replace must be used
// Escape valid CSS special characters that are also RegExp special characters
var escapedRootSelectors = rootSelectors.map(function (rootSelector) {
return rootSelector.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
});
unionSelector = unionSelector.replace(new RegExp('(' + // Start capture group
escapedRootSelectors.join('|') + // Match any one root selector
')' // End capture group
), '$1' + scopeClassName // Replace any one root selector match with a union
); // of the root selector and scoping class (e.g., .rootSelector._scoped-1). Order matters here because of type-class union support like div._scoped-1
// Do both union and contains selectors because of case <div><div></div></div>
// or <div className="foo"><div className="foo"></div></div>
containsSelector = scopeClassName + ' ' + selectors[i];
scopedSelector.push(unionSelector, containsSelector);
} else {
containsSelector = scopeClassName + ' ' + selectors[i];
scopedSelector.push(containsSelector);
}
}
return scopedSelector.join(', ');
};
_this.getScopeClassName = function (styleString, rootElement) {
var hash = styleString;
if (rootElement) {
_this.pepper = '';
_this.traverseObjectToGeneratePepper(rootElement);
hash += _this.pepper;
}
return (__DEV__ ? 'scope-' : 's') + (0, _reactLibAdler2.default)(hash);
};
_this.traverseObjectToGeneratePepper = function (obj) {
var depth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
// Max depth is equal to max depth of JSON.stringify
// Max length of 10,000 is arbitrary
if (depth > 32 || _this.pepper.length > 10000) return;
for (var prop in obj) {
// Avoid internal props that are unreliable
var isPropReactInternal = /^[_$]|type|ref|^value$/.test(prop);
if (!!obj[prop] && _typeof(obj[prop]) === 'object' && !isPropReactInternal) {
_this.traverseObjectToGeneratePepper(obj[prop], depth + 1);
} else if (!!obj[prop] && !isPropReactInternal && typeof obj[prop] !== 'function') {
_this.pepper += obj[prop];
}
}
};
_this.isVoidElement = function (type) {
return ['area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr'].some(function (voidType) {
return type === voidType;
});
};
_this.addCSSTextToHead = function (cssText) {
if (!cssText.length) {
return;
} else {
var cssTextHash = (0, _reactLibAdler2.default)(cssText);
if (!window._reactiveStyle.cssTextHashesAddedToHead.some(function (hash) {
return hash === cssTextHash;
})) {
window._reactiveStyle.el.innerHTML += cssText;
window._reactiveStyle.cssTextHashesAddedToHead.push(cssTextHash);
}
}
};
_this.createStyleElement = function (cssText, scopeClassName) {
return _react2.default.createElement('style', { type: 'text/css', key: scopeClassName, ref: function ref(c) {
return _this._style = c;
},
dangerouslySetInnerHTML: {
__html: cssText || ''
} });
};
_this.getNewChildrenForCloneElement = function (cssText, rootElement, scopeClassName) {
return [_this.createStyleElement(cssText, scopeClassName)].concat(rootElement.props.children);
};
_this.scopeClassNameCache = {};
_this.scopedCSSTextCache = {};
return _this;
}
_createClass(Style, [{
key: 'render',
value: function render() {
if (!this.props.children) {
return this.createStyleElement();
}
var styleString = this.getStyleString();
var rootElement = this.getRootElement();
if (!styleString && rootElement) {
// Passthrough; no style actions
return rootElement.props.children;
} else if (styleString && !rootElement) {
// Global styling with no scoping
return this.createStyleElement(this.processCSSText(styleString), this.getScopeClassName(styleString, rootElement));
} else {
// Style tree of elements
var rootElementClassNames = rootElement.props.className ? rootElement.props.className + ' ' : '';
var rootElementId = rootElement.props.id ? rootElement.props.id : '';
// If styleString has already been calculated before and CSS text is unchanged;
// use the cached version. No need to recalculate.
var scopeClassName = void 0;
var scopedCSSText = void 0;
// Include rootElementClassName and rootElementId as part of cache address
// to ensure upon state/prop change resulting in new id/class on root element
// will properly generate a union selector.
// WARNING: May be a preoptimization; cost of adding union selector to all selectors
// could be so low that its worth doing so to avoid surface space for bugs
var scopeClassNameAddress = rootElementClassNames + rootElementId + styleString;
if (this.scopeClassNameCache[scopeClassNameAddress]) {
// Use cached scope and scoped CSS Text
scopeClassName = this.scopeClassNameCache[scopeClassNameAddress];
scopedCSSText = this.scopedCSSTextCache[scopeClassName];
} else {
// Calculate scope and scoped CSS Text
scopeClassName = this.getScopeClassName(styleString, rootElement);
scopedCSSText = this.processCSSText(styleString, '.' + scopeClassName, this.getRootSelectors(rootElement));
// Cache for future use
this.scopeClassNameCache[scopeClassNameAddress] = scopeClassName;
this.scopedCSSTextCache[scopeClassName] = scopedCSSText;
}
return (0, _react.cloneElement)(rootElement, _extends({}, rootElement.props, {
className: '' + rootElementClassNames + scopeClassName
}), this.getNewChildrenForCloneElement(scopedCSSText, rootElement, scopeClassName));
}
}
/**
* Filters out the style string from this.props.children
*
* > getStyleString()
* ".foo { color: red; }"
*
* @return {?string} string Style string
*/
/**
* Filters out the root element from this.props.children
*
* > getRootElement()
* "<MyRootElement />"
*
* @return {?ReactDOMComponent} component Root element component
*/
/**
* Creates an array of selectors which target the root element
*
* > getRootSelectors( <div id="foo" className="bar" /> )
* "['#foo', '.bar']"
*
* @param {ReactDOMComponent} component
* @return {!array} array Array of selectors that target the root element
*/
/**
* Scopes CSS statement with a given scoping class name as a union or contains selector;
* also escapes CSS declaration bodies
*
* > proccessStyleString( '.foo { color: red; } .bar { color: green; }', '_scoped-1234, ['.root', '.foo'] )
* ".scoped-1234.foo { color: red; } .scoped-1234 .bar { color: green; }"
*
* @param {string} styleString String of style rules
* @param {string} scopeClassName Class name used to create a unique scope
* @param {array} rootSelectors Array of selectors on the root element; ids and classNames
* @return {!string} Scoped style rule string
*/
/**
* Escaper used in escapeTextContentForBrowser
*
*/
/**
* Escapes text to prevent scripting attacks.
*
* @param {*} text Text value to escape.
* @return {string} An escaped string.
*/
/**
* Scopes a selector with a given scoping className as a union or contains selector
*
* > scopeSelector( '_scoped-1827481', '.root', ['.root', '.foo'] )
* ".scoped-1827481.root"
*
* @param {string} scopeClassName Class name used to scope selectors
* @param {string} selector Selector to scope
* @param {array} rootSelectors Array of selectors on the root element; ids and classNames
* @return {!string} Union or contains selector scoped with the scoping className
*/
/**
* Creates a className used as a CSS scope by generating a checksum from a styleString
*
* > scoped( 'footer { color: red; }' )
* "_scoped-182938591"
*
* @param {string} String of style rules
* @return {!string} A scoping class name
*/
/**
* Traverses an object tree looking for anything that is not internal or a circular
* reference. Accumulates values on this.pepper
*
* > traverseObjectToGeneratePepper(obj)
* void
* @param {object} object Object to traverse
*/
/**
* Checks if a tag type is a self-closing void element
*
* > isVoidElement( "img" )
* "true"
*
* @param {*} string Element type to check
* @return {!bool} bool True or false
*/
/**
* Add CSS text to the style element in the head of document unless it has
* already been added.
*
* > addCSSTextToHead( ".foo { color: red; }" )
*
* @param {string} string CSS text to add to head
*/
/**
* Creates the style element used for server side rendering
* > createStyleElement( ".foo._scoped-1 { color: red; }" )
*
*
* @param {string} string CSS string
* @return {ReactDOMComponent} component
*/
/**
* Returns new children for a root element being cloned. If mounted the CSS text
* is added to the style element in head, otherwise we are doing server side rendering
* and to avoid flash of unstyled content (FOUC) a style element is added to children
* to avoid FOUC on first render.
*
* > getNewChildrenForCloneElement( ".foo._scoped-1 { color: red; }" )
* "<NewChildren />"
*
* @param {string} string CSS string
* @return {ReactDOMComponent} component
*/
/**
* Syntactic sugar for functional usage of Reactive Style
*
* > Style.it( ".foo { color: red; }", <div /> )
* "<div class="_scoped-1">
* <style type="text/css">
* .foo._scoped-1 { color: red; }
* </style>
* </div>"
*
* @param {string} string CSS string
* @param {ReactDOMComponent} component
*/
}]);
return Style;
}(_react.Component);
Style.it = function (cssText, rootElement) {
return _react2.default.createElement(
Style,
null,
cssText,
rootElement
);
};
exports.default = Style;
/***/ },
/* 1 */
/***/ function(module, exports) {
/**
* 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.
*
* @providesModule adler32
*/
'use strict';
var MOD = 65521;
// adler32 is not cryptographically strong, and is only used to sanity check that
// markup generated on the server matches the markup generated on the client.
// This implementation (a modified version of the SheetJS version) has been optimized
// for our use case, at the expense of conforming to the adler32 specification
// for non-ascii inputs.
function adler32(data) {
var a = 1;
var b = 0;
var i = 0;
var l = data.length;
var m = l & ~0x3;
while (i < m) {
var n = Math.min(i + 4096, m);
for (; i < n; i += 4) {
b += (a += data.charCodeAt(i)) + (a += data.charCodeAt(i + 1)) + (a += data.charCodeAt(i + 2)) + (a += data.charCodeAt(i + 3));
}
a %= MOD;
b %= MOD;
}
for (; i < l; i++) {
b += a += data.charCodeAt(i);
}
a %= MOD;
b %= MOD;
return a | b << 16;
}
module.exports = adler32;
/***/ },
/* 2 */
/***/ function(module, exports) {
module.exports = __WEBPACK_EXTERNAL_MODULE_2__;
/***/ }
/******/ ])
});
;