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Remove String.fromCodePoint shim (#279)

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This is not necessary anymore if we drop support for Node.js v0.10 and v0.12.

Ref. https://github.com/babel/babel/issues/4315.
This commit is contained in:
Mathias Bynens 2017-01-10 20:14:11 +01:00 committed by Daniel Tschinder
parent cd9aaf2a58
commit ed625cb2e1
3 changed files with 4 additions and 72 deletions
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66
src/plugins/jsx/fromCodePoint.js
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@ -1,66 +0,0 @@
// Adapted from String.fromcodepoint to export the function without modifying String
/*! https://mths.be/fromcodepoint v0.2.1 by @mathias */
// The MIT License (MIT)
// Copyright (c) Mathias Bynens
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
// associated documentation files (the "Software"), to deal in the Software without restriction,
// including without limitation the rights to use, copy, modify, merge, publish, distribute,
// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
let fromCodePoint = String.fromCodePoint;
if (!fromCodePoint) {
const stringFromCharCode = String.fromCharCode;
const floor = Math.floor;
fromCodePoint = function() {
const MAX_SIZE = 0x4000;
const codeUnits = [];
let highSurrogate;
let lowSurrogate;
let index = -1;
const length = arguments.length;
if (!length) {
return "";
}
let result = "";
while (++index < length) {
let codePoint = Number(arguments[index]);
if (
!isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
codePoint < 0 || // not a valid Unicode code point
codePoint > 0x10FFFF || // not a valid Unicode code point
floor(codePoint) != codePoint // not an integer
) {
throw RangeError("Invalid code point: " + codePoint);
}
if (codePoint <= 0xFFFF) { // BMP code point
codeUnits.push(codePoint);
} else { // Astral code point; split in surrogate halves
// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
codePoint -= 0x10000;
highSurrogate = (codePoint >> 10) + 0xD800;
lowSurrogate = (codePoint % 0x400) + 0xDC00;
codeUnits.push(highSurrogate, lowSurrogate);
}
if (index + 1 == length || codeUnits.length > MAX_SIZE) {
result += stringFromCharCode.apply(null, codeUnits);
codeUnits.length = 0;
}
}
return result;
};
}
export default fromCodePoint;

6
src/plugins/jsx/index.js
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@ -1,7 +1,5 @@
/* eslint indent: 0 */
import fromCodePoint from "./fromCodePoint";
import XHTMLEntities from "./xhtml";
import { TokenType, types as tt } from "../../tokenizer/types";
import { TokContext, types as tc } from "../../tokenizer/context";
@ -138,11 +136,11 @@ pp.jsxReadEntity = function() {
if (str[1] === "x") {
str = str.substr(2);
if (HEX_NUMBER.test(str))
entity = fromCodePoint(parseInt(str, 16));
entity = String.fromCodePoint(parseInt(str, 16));
} else {
str = str.substr(1);
if (DECIMAL_NUMBER.test(str))
entity = fromCodePoint(parseInt(str, 10));
entity = String.fromCodePoint(parseInt(str, 10));
}
} else {
entity = XHTMLEntities[str];

4
test/fixtures/jsx/basic/entity/expected.json vendored
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@ -136,7 +136,7 @@
}
},
"extra": null,
"value": "💩"
"value": "\uD83D\uDCA9"
}
]
}
@ -144,4 +144,4 @@
],
"directives": []
}
}
}