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/**
* Copyright (c) 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.
*
* @typechecks
*/
/**
* Unicode-enabled extra utility functions not always needed.
*/
'use strict';
var UnicodeUtils = require('./UnicodeUtils');
/**
* @param {number} codePoint Valid Unicode code-point
* @param {number} len Zero-padded minimum width of result
* @return {string} A zero-padded hexadecimal string (00XXXX)
*/
function zeroPaddedHex(codePoint, len) {
var codePointHex = codePoint.toString(16).toUpperCase();
var numZeros = Math.max(0, len - codePointHex.length);
var result = '';
for (var i = 0; i < numZeros; i++) {
result += '0';
}
result += codePointHex;
return result;
}
/**
* @param {number} codePoint Valid Unicode code-point
* @return {string} A formatted Unicode code-point string
* of the format U+XXXX, U+XXXXX, or U+XXXXXX
*/
function formatCodePoint(codePoint) {
codePoint = codePoint || 0; // NaN --> 0
var formatted = '';
if (codePoint <= 0xFFFF) {
formatted = zeroPaddedHex(codePoint, 4);
} else {
formatted = codePoint.toString(16).toUpperCase();
}
return 'U+' + formatted;
}
/**
* Get a list of formatted (string) Unicode code-points from a String
*
* @param {string} str Valid Unicode string
* @return {array<string>} A list of formatted code-point strings
*/
function getCodePointsFormatted(str) {
var codePoints = UnicodeUtils.getCodePoints(str);
return codePoints.map(formatCodePoint);
}
var specialEscape = {
0x07: '\\a',
0x08: '\\b',
0x0C: '\\f',
0x0A: '\\n',
0x0D: '\\r',
0x09: '\\t',
0x0B: '\\v',
0x22: '\\"',
0x5c: '\\\\'
};
/**
* Returns a double-quoted PHP string with all non-printable and
* non-US-ASCII sequences escaped.
*
* @param {string} str Valid Unicode string
* @return {string} Double-quoted string with Unicode sequences escaped
*/
function phpEscape(s) {
var result = '"';
var _iteratorNormalCompletion = true;
var _didIteratorError = false;
var _iteratorError = undefined;
try {
for (var _iterator = UnicodeUtils.getCodePoints(s)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
var cp = _step.value;
var special = specialEscape[cp];
if (special !== undefined) {
result += special;
} else if (cp >= 0x20 && cp <= 0x7e) {
result += String.fromCodePoint(cp);
} else if (cp <= 0xFFFF) {
result += '\\u{' + zeroPaddedHex(cp, 4) + '}';
} else {
result += '\\u{' + zeroPaddedHex(cp, 6) + '}';
}
}
} catch (err) {
_didIteratorError = true;
_iteratorError = err;
} finally {
try {
if (!_iteratorNormalCompletion && _iterator['return']) {
_iterator['return']();
}
} finally {
if (_didIteratorError) {
throw _iteratorError;
}
}
}
result += '"';
return result;
}
/**
* Returns a double-quoted Java or JavaScript string with all
* non-printable and non-US-ASCII sequences escaped.
*
* @param {string} str Valid Unicode string
* @return {string} Double-quoted string with Unicode sequences escaped
*/
function jsEscape(s) {
var result = '"';
for (var i = 0; i < s.length; i++) {
var cp = s.charCodeAt(i);
var special = specialEscape[cp];
if (special !== undefined) {
result += special;
} else if (cp >= 0x20 && cp <= 0x7e) {
result += String.fromCodePoint(cp);
} else {
result += '\\u' + zeroPaddedHex(cp, 4);
}
}
result += '"';
return result;
}
function c11Escape(s) {
var result = '';
var _iteratorNormalCompletion2 = true;
var _didIteratorError2 = false;
var _iteratorError2 = undefined;
try {
for (var _iterator2 = UnicodeUtils.getCodePoints(s)[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
var cp = _step2.value;
var special = specialEscape[cp];
if (special !== undefined) {
result += special;
} else if (cp >= 0x20 && cp <= 0x7e) {
result += String.fromCodePoint(cp);
} else if (cp <= 0xFFFF) {
result += '\\u' + zeroPaddedHex(cp, 4);
} else {
result += '\\U' + zeroPaddedHex(cp, 8);
}
}
} catch (err) {
_didIteratorError2 = true;
_iteratorError2 = err;
} finally {
try {
if (!_iteratorNormalCompletion2 && _iterator2['return']) {
_iterator2['return']();
}
} finally {
if (_didIteratorError2) {
throw _iteratorError2;
}
}
}
return result;
}
/**
* Returns a double-quoted C string with all non-printable and
* non-US-ASCII sequences escaped.
*
* @param {string} str Valid Unicode string
* @return {string} Double-quoted string with Unicode sequences escaped
*/
function cEscape(s) {
return 'u8"' + c11Escape(s) + '"';
}
/**
* Returns a double-quoted Objective-C string with all non-printable
* and non-US-ASCII sequences escaped.
*
* @param {string} str Valid Unicode string
* @return {string} Double-quoted string with Unicode sequences escaped
*/
function objcEscape(s) {
return '@"' + c11Escape(s) + '"';
}
/**
* Returns a double-quoted Python string with all non-printable
* and non-US-ASCII sequences escaped.
*
* @param {string} str Valid Unicode string
* @return {string} Double-quoted string with Unicode sequences escaped
*/
function pyEscape(s) {
return 'u"' + c11Escape(s) + '"';
}
var UnicodeUtilsExtra = {
formatCodePoint: formatCodePoint,
getCodePointsFormatted: getCodePointsFormatted,
zeroPaddedHex: zeroPaddedHex,
phpEscape: phpEscape,
jsEscape: jsEscape,
cEscape: cEscape,
objcEscape: objcEscape,
pyEscape: pyEscape
};
module.exports = UnicodeUtilsExtra;
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