90 lines
2.7 KiB
JavaScript
90 lines
2.7 KiB
JavaScript
/*
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* Copyright 2014 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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const fs = require("fs");
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const path = require("path");
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const spawn = require("child_process").spawn;
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const ttxResourcesHome = path.join(__dirname, "..", "ttx");
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let nextTTXTaskId = Date.now();
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function runTtx(ttxResourcesHomePath, fontPath, registerOnCancel, callback) {
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fs.realpath(ttxResourcesHomePath, function (error, realTtxResourcesHomePath) {
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const fontToolsHome = path.join(realTtxResourcesHomePath, "fonttools-code");
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fs.realpath(fontPath, function (errorFontPath, realFontPath) {
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const ttxPath = path.join("Tools", "ttx");
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if (!fs.existsSync(path.join(fontToolsHome, ttxPath))) {
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callback("TTX was not found, please checkout PDF.js submodules");
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return;
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}
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const ttxEnv = {
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PYTHONPATH: path.join(fontToolsHome, "Lib"),
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PYTHONDONTWRITEBYTECODE: true,
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};
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const ttxStdioMode = "ignore";
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const ttx = spawn("python", [ttxPath, realFontPath], {
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cwd: fontToolsHome,
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stdio: ttxStdioMode,
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env: ttxEnv,
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});
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let ttxRunError;
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registerOnCancel(function (reason) {
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ttxRunError = reason;
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callback(reason);
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ttx.kill();
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});
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ttx.on("error", function (errorTtx) {
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ttxRunError = errorTtx;
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callback("Unable to execute ttx");
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});
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ttx.on("close", function (code) {
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if (ttxRunError) {
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return;
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}
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callback();
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});
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});
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});
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}
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exports.translateFont = function translateFont(
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content,
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registerOnCancel,
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callback
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) {
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const buffer = Buffer.from(content, "base64");
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const taskId = (nextTTXTaskId++).toString();
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const fontPath = path.join(ttxResourcesHome, taskId + ".otf");
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const resultPath = path.join(ttxResourcesHome, taskId + ".ttx");
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fs.writeFileSync(fontPath, buffer);
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runTtx(ttxResourcesHome, fontPath, registerOnCancel, function (err) {
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fs.unlinkSync(fontPath);
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if (err) {
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console.error(err);
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callback(err);
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} else if (!fs.existsSync(resultPath)) {
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callback("Output was not generated");
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} else {
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callback(null, fs.readFileSync(resultPath));
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fs.unlinkSync(resultPath);
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}
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});
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};
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