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Remove the btoa/atob polyfills

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This is only relevant for browsers that we don't intend to support with PDF.js version `2.0`.
This commit is contained in:
Jonas Jenwald 2017-11-16 13:52:35 +01:00
parent 150ac0788f
commit d8cb74d3e3
1 changed files with 0 additions and 61 deletions
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61
src/shared/compatibility.js
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@ -102,67 +102,6 @@ PDFJS.compatibilityChecked = true;
});
})();
// window.btoa (base64 encode function) ?
// Support: IE<10
(function checkWindowBtoaCompatibility() {
if ('btoa' in globalScope) {
return;
}
var digits =
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
globalScope.btoa = function (chars) {
var buffer = '';
var i, n;
for (i = 0, n = chars.length; i < n; i += 3) {
var b1 = chars.charCodeAt(i) & 0xFF;
var b2 = chars.charCodeAt(i + 1) & 0xFF;
var b3 = chars.charCodeAt(i + 2) & 0xFF;
var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
buffer += (digits.charAt(d1) + digits.charAt(d2) +
digits.charAt(d3) + digits.charAt(d4));
}
return buffer;
};
})();
// window.atob (base64 encode function)?
// Support: IE<10
(function checkWindowAtobCompatibility() {
if ('atob' in globalScope) {
return;
}
// https://github.com/davidchambers/Base64.js
var digits =
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
globalScope.atob = function (input) {
input = input.replace(/=+$/, '');
if (input.length % 4 === 1) {
throw new Error('bad atob input');
}
for (
// initialize result and counters
var bc = 0, bs, buffer, idx = 0, output = '';
// get next character
(buffer = input.charAt(idx++));
// character found in table?
// initialize bit storage and add its ascii value
~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
// and if not first of each 4 characters,
// convert the first 8 bits to one ascii character
bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0
) {
// try to find character in table (0-63, not found => -1)
buffer = digits.indexOf(buffer);
}
return output;
};
})();
// Function.prototype.bind?
// Support: Android<4.0, iOS<6.0
(function checkFunctionPrototypeBindCompatibility() {