87 lines
2.9 KiB
JavaScript
87 lines
2.9 KiB
JavaScript
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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var parse = loadModule("parse-js.js");
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var process = loadModule("process.js");
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onmessage = function(event) {
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var source = event.data;
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var formattedSource = beautify(source);
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var mapping = buildMapping(source, formattedSource);
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postMessage({ formattedSource: formattedSource, mapping: mapping });
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};
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function beautify(source)
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{
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var ast = parse.parse(source);
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var beautifyOptions = {
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indent_level: 4,
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indent_start: 0,
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quote_keys: false,
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space_colon: false
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};
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return process.gen_code(ast, beautifyOptions);
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}
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function buildMapping(source, formattedSource)
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{
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var mapping = { original: [], formatted: [] };
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var lastCodePosition = 0;
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var regexp = /[\$\.\w]+|{|}/g;
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while (true) {
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var match = regexp.exec(formattedSource);
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if (!match)
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break;
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var position = source.indexOf(match[0], lastCodePosition);
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if (position === -1)
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continue;
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mapping.original.push(position);
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mapping.formatted.push(match.index);
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lastCodePosition = position + match[0].length;
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}
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return mapping;
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}
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function loadModule(src)
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{
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var request = new XMLHttpRequest();
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request.open("GET", src, false);
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request.send();
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var exports = {};
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eval(request.responseText);
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return exports;
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}
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function require()
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{
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return parse;
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}
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