Added vulcanize under third_party/npm_modules

node_modules/vulcanize/lib/vulcan.js

+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+// jshint node: true
+
+var cssom = require('cssom');
+var fs = require('fs');
+var path = require('path');
+var uglify = require('uglify-js');
+var url = require('url');
+var whacko = require('whacko');
+
+var constants = require('./constants.js');
+var optparser = require('./optparser.js');
+var pathresolver = require('./pathresolver');
+var utils = require('./utils');
+var setTextContent = utils.setTextContent;
+var getTextContent = utils.getTextContent;
+var searchAll = utils.searchAll;
+
+var read = {};
+var options = {};
+
+// validate options with boolean return
+function setOptions(optHash, callback) {
+  optparser.processOptions(optHash, function(err, o) {
+    if (err) {
+      return callback(err);
+    }
+    options = o;
+    callback();
+  });
+}
+
+function exclude(regexes, href) {
+  return regexes.some(function(r) {
+    return r.test(href);
+  });
+}
+
+function excludeImport(href) {
+  return exclude(options.excludes.imports, href);
+}
+
+function excludeScript(href) {
+  return exclude(options.excludes.scripts, href);
+}
+
+function excludeStyle(href) {
+  return exclude(options.excludes.styles, href);
+}
+
+function readFile(file) {
+  var content = fs.readFileSync(file, 'utf8');
+  return content.replace(/^\uFEFF/, '');
+}
+
+// inline relative linked stylesheets into <style> tags
+function inlineSheets($, inputPath, outputPath) {
+  searchAll($, 'link[rel="stylesheet"]').each(function() {
+    var el = $(this);
+    var href = el.attr('href');
+    if (href && !excludeStyle(href)) {
+
+      var rel = href;
+      var inputPath = path.dirname(options.input);
+      if (constants.ABS_URL.test(rel)) {
+          var abs = path.resolve(inputPath, path.join(options.abspath, rel));
+          rel = path.relative(options.outputDir, abs);
+      }
+
+      var filepath = path.resolve(options.outputDir, rel);
+      // fix up paths in the stylesheet to be relative to the location of the style
+      var content = pathresolver.rewriteURL(path.dirname(filepath), outputPath, readFile(filepath));
+      var styleEl = whacko('<style>' + content + '</style>');
+      // clone attributes
+      styleEl.attr(el.attr());
+      // don't set href or rel on the <style>
+      styleEl.attr('href', null);
+      styleEl.attr('rel', null);
+      el.replaceWith(whacko.html(styleEl));
+    }
+  });
+}
+
+function inlineScripts($, dir) {
+  searchAll($, constants.JS_SRC).each(function() {
+    var el = $(this);
+    var src = el.attr('src');
+    if (src && !excludeScript(src)) {
+
+      var rel = src;
+      var inputPath = path.dirname(options.input);
+      if (constants.ABS_URL.test(rel)) {
+          var abs = path.resolve(inputPath, path.join(options.abspath, rel));
+          rel = path.relative(options.outputDir, abs);
+      }
+
+      var filepath = path.resolve(dir, rel);
+      var content = readFile(filepath);
+      // NOTE: reusing UglifyJS's inline script printer (not exported from OutputStream :/)
+      content = content.replace(/<\x2fscript([>\/\t\n\f\r ])/gi, "<\\/script$1");
+      el.replaceWith('<script>' + content + '</script>');
+    }
+  });
+}
+
+function concat(filename) {
+  if (!read[filename]) {
+    read[filename] = true;
+    var $ = whacko.load(readFile(filename));
+    var dir = path.dirname(filename);
+    pathresolver.resolvePaths($, dir, options.outputDir, options.abspath);
+    processImports($);
+    inlineSheets($, dir, options.outputDir);
+    return $;
+  } else if (options.verbose) {
+    console.log('Dependency deduplicated');
+  }
+}
+
+function processImports($, mainDoc) {
+  var bodyContent = [];
+  searchAll($, constants.IMPORTS).each(function() {
+    var el = $(this);
+    var href = el.attr('href');
+    if (!excludeImport(href)) {
+      var rel = href;
+      var inputPath = path.dirname(options.input);
+      if (constants.ABS_URL.test(rel)) {
+        var abs = path.resolve(inputPath, path.join(options.abspath, rel));
+        rel = path.relative(options.outputDir, abs);
+      }
+      var $$ = concat(path.resolve(options.outputDir, rel));
+      if (!$$) {
+        // remove import link
+        el.remove();
+        return;
+      }
+      // append import document head to main document head
+      el.replaceWith($$('head').html());
+      var bodyHTML = $$('body').html();
+      // keep the ordering of the import body in main document, before main document's body
+      bodyContent.push(bodyHTML);
+    } else if (!options.keepExcludes) {
+      // if the path is excluded for being absolute, then the import link must remain
+      var absexclude = options.abspath ? constants.REMOTE_ABS_URL : constants.ABS_URL;
+      if (!absexclude.test(href)) {
+        el.remove();
+      }
+    }
+  });
+  // prepend the import document body contents to the main document, in order
+  var content = bodyContent.join('\n');
+  // hide import body content in the main document
+  if (mainDoc && content) {
+    content = '<div hidden>' + content + '</div>';
+  }
+  $('body').prepend(content);
+}
+
+function findScriptLocation($) {
+  var pos = $('body').last();
+  if (!pos.length) {
+    pos = $.root();
+  }
+  return pos;
+}
+
+function isCommentOrEmptyTextNode(node) {
+  if (node.type === 'comment'){
+    return true;
+  } else if (node.type === 'text') {
+    // return true if the node is only whitespace
+    return !((/\S/).test(node.data));
+  }
+}
+
+function compressJS(content, inline) {
+  try {
+    var ast = uglify.parse(content);
+    return ast.print_to_string({inline_script: inline});
+  } catch (e) {
+    // return a useful error
+    var js_err = new Error('Compress JS Error');
+    js_err.detail = e.message + ' at line: ' + e.line + ' col: ' + e.col;
+    js_err.content = content;
+    js_err.toString = function() {
+      return this.message + '\n' + this.detail + '\n' + this.content;
+    };
+    throw js_err;
+  }
+}
+
+function compressCSS(content) {
+  var out;
+  try {
+    var ast = cssom.parse(content);
+    out = ast.toString();
+  } catch (e) {
+    if (options.verbose) {
+      console.log('Error parsing CSS:', e.toString());
+      console.log('Falling back to removing newlines only');
+    }
+    out = content;
+  } finally {
+    return out.replace(/[\r\n]/g, '');
+  }
+}
+
+function removeCommentsAndWhitespace($) {
+  function walk(node) {
+    var content, c;
+    if (!node) {
+      return;
+    } else if (isCommentOrEmptyTextNode(node)) {
+      $(node).remove();
+      return true;
+    } else if (node.type == 'script') {
+      // only run uglify on inline javascript scripts
+      if (!node.attribs.src && (!node.attribs.type || node.attribs.type == "text/javascript")) {
+        content = getTextContent(node);
+        setTextContent(node, compressJS(content, true));
+      }
+    } else if (node.type == 'style') {
+      content = getTextContent(node);
+      setTextContent(node, compressCSS(content));
+    } else if ((c = node.children)) {
+      for (var i = 0; i < c.length; i++) {
+        // since .remove() will modify this array, decrement `i` on successful comment removal
+        if (walk(c[i])) {
+          i--;
+        }
+      }
+    }
+  }
+
+  // walk the whole AST from root
+  walk($.root().get(0));
+}
+
+function writeFileSync(filename, data, eop) {
+  if (!options.outputHandler) {
+    fs.writeFileSync(filename, data, 'utf8');
+  } else {
+    options.outputHandler(filename, data, eop);
+  }
+}
+
+function handleMainDocument() {
+  // reset shared buffers
+  read = {};
+  var content = options.inputSrc ? options.inputSrc.toString() : readFile(options.input);
+  var $ = whacko.load(content);
+  var dir = path.dirname(options.input);
+  pathresolver.resolvePaths($, dir, options.outputDir, options.abspath);
+  processImports($, true);
+  if (options.inline) {
+    inlineSheets($, dir, options.outputDir);
+  }
+
+  if (options.inline) {
+    inlineScripts($, options.outputDir);
+  }
+
+  searchAll($, constants.JS_INLINE).each(function() {
+    var el = $(this);
+    var content = getTextContent(el);
+    // find ancestor polymer-element node
+    var parentElement = el.closest('polymer-element').get(0);
+    if (parentElement) {
+      var match = constants.POLYMER_INVOCATION.exec(content);
+      var elementName = $(parentElement).attr('name');
+      if (match) {
+        var invocation = utils.processPolymerInvocation(elementName, match);
+        content = content.replace(match[0], invocation);
+        setTextContent(el, content);
+      }
+    }
+  });
+
+  // strip noscript from elements, and instead inject explicit Polymer() invocation
+  // script, so registration order is preserved
+  searchAll($, constants.ELEMENTS_NOSCRIPT).each(function() {
+    var el = $(this);
+    var name = el.attr('name');
+    if (options.verbose) {
+      console.log('Injecting explicit Polymer invocation for noscript element "' + name + '"');
+    }
+    el.append('<script>Polymer(\'' + name + '\');</script>');
+    el.attr('noscript', null);
+  });
+
+  // strip scripts into a separate file
+  if (options.csp) {
+    if (options.verbose) {
+      console.log('Separating scripts into separate file');
+    }
+
+    // CSPify main page by removing inline scripts
+    var scripts = [];
+    searchAll($, constants.JS_INLINE).each(function() {
+      var el = $(this);
+      var content = getTextContent(el);
+      scripts.push(content);
+      el.remove();
+    });
+
+    // join scripts with ';' to prevent breakages due to EOF semicolon insertion
+    var scriptName = path.basename(options.output, '.html') + '.js';
+    var scriptContent = scripts.join(';' + constants.EOL);
+    if (options.strip) {
+      scriptContent = compressJS(scriptContent, false);
+    }
+
+    writeFileSync(path.resolve(options.outputDir, scriptName), scriptContent);
+    // insert out-of-lined script into document
+    findScriptLocation($).append('<script charset="utf-8" src="' + scriptName + '"></script>');
+  }
+
+  deduplicateImports($);
+
+  if (options.strip) {
+    removeCommentsAndWhitespace($);
+  }
+
+  writeFileSync(options.output, $.html(), true);
+}
+
+function deduplicateImports($) {
+  var imports = {};
+  searchAll($, constants.IMPORTS).each(function() {
+    var el = $(this);
+    var href = el.attr('href');
+    // TODO(dfreedm): allow a user defined base url?
+    var abs = url.resolve('http://', href);
+    if (!imports[abs]) {
+      imports[abs] = true;
+    } else {
+      if(options.verbose) {
+        console.log('Import Dependency deduplicated');
+      }
+      el.remove();
+    }
+  });
+}
+
+exports.processDocument = handleMainDocument;
+exports.setOptions = setOptions;