mirror of
https://github.com/pierre42100/comunic
synced 2024-09-29 03:22:49 +00:00
93 lines
2.6 KiB
JavaScript
Executable File
93 lines
2.6 KiB
JavaScript
Executable File
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/*
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* Copyright 2013 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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var base64alphabet =
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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function decodeFontData(base64) {
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var result = [];
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var bits = 0, bitsLength = 0;
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for (var i = 0, ii = base64.length; i < ii; i++) {
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var ch = base64[i];
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if (ch <= ' ') {
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continue;
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}
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var index = base64alphabet.indexOf(ch);
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if (index < 0) {
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throw new Error('Invalid character');
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}
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if (index >= 64) {
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break;
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}
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bits = (bits << 6) | index;
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bitsLength += 6;
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if (bitsLength >= 8) {
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bitsLength -= 8;
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var code = (bits >> bitsLength) & 0xFF;
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result.push(code);
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}
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}
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return new Uint8Array(result);
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}
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function encodeFontData(data) {
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var buffer = '';
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var i, n;
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for (i = 0, n = data.length; i < n; i += 3) {
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var b1 = data[i] & 0xFF;
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var b2 = data[i + 1] & 0xFF;
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var b3 = data[i + 2] & 0xFF;
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var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
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var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
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var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
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buffer += (base64alphabet.charAt(d1) + base64alphabet.charAt(d2) +
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base64alphabet.charAt(d3) + base64alphabet.charAt(d4));
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}
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return buffer;
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}
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function ttx(data, callback) {
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var xhr = new XMLHttpRequest();
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xhr.open('POST', '/ttx');
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var encodedData = encodeFontData(data);
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xhr.setRequestHeader('Content-type', 'text/plain');
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xhr.setRequestHeader('Content-length', encodedData.length);
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xhr.onreadystatechange = function getPdfOnreadystatechange(e) {
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if (xhr.readyState === 4) {
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if (xhr.status === 200) {
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callback(xhr.responseText);
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} else {
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callback('<error>Transport error: ' + xhr.statusText + '</error>');
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}
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}
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};
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xhr.send(encodedData);
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}
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function verifyTtxOutput(output) {
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var m = /^<error>(.*?)<\/error>/.exec(output);
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if (m) {
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throw m[1];
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}
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}
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