diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml index 5e58db9..5acd5d8 100644 --- a/.github/workflows/build.yml +++ b/.github/workflows/build.yml @@ -9,7 +9,5 @@ jobs: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - - name: Install claat - run: ./download-claat-linux.sh - name: Build - run: PATH="/tmp/claat:${PATH}" python3 build.py + run: ./build.sh diff --git a/build.sh b/build.sh new file mode 100755 index 0000000..d5bade9 --- /dev/null +++ b/build.sh @@ -0,0 +1,15 @@ +#!/bin/bash + +set -euo pipefail + +./download-claat-linux.sh +PATH="/tmp/claat:${PATH}" python3 ./build.py + +sed -e 's#https://storage.googleapis.com/claat-public#/static#g' -i build/*/index.html + +# The public static hosting seems offline (e.g. https://storage.googleapis.com/claat-public/codelab-elements.css) so we vendor these assets: +# Built by running `USE_BAZEL_VERSION=0.19.1 bazel build :bundle` with patches to: +# 1. `//codelab-elements/google-codelab-analytics`: `suppress = ["strictDependencies", "missingProvide", "checkVars", "missingProperties", "unusedLocalVariables", "unusedLocalVariables"],` +# 2. `//codelab-elements/google-codelab`: `suppress = ["unusedLocalVariables"],` +mkdir build/static +cp static/* build/static/ diff --git a/netlify.toml b/netlify.toml index 4a8d745..964b265 100644 --- a/netlify.toml +++ b/netlify.toml @@ -1,7 +1,7 @@ [build] ignore = "exit 1" #always build on PR even if you can't detect changes in this folder publish = "build" -command = './download-claat-linux.sh && PATH="/tmp/claat:${PATH}" python3 ./build.py' +command = './build.sh' [build.environment] PYTHON_VERSION="3.13" diff --git a/static/LICENSE b/static/LICENSE new file mode 100644 index 0000000..420f8fb --- /dev/null +++ b/static/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright 2016 Google Inc. All Rights Reserved. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/static/README.md b/static/README.md new file mode 100644 index 0000000..d8741ec --- /dev/null +++ b/static/README.md @@ -0,0 +1,180 @@ +# Codelab Custom Elements + +The next generation of the codelab elements without any framework or library +dependencies, only the [Custom Elements](https://html.spec.whatwg.org/multipage/custom-elements.html) +standard spec. + +If this is a release bundle, produced with a `bazel build :bundle` command, +you should see `codelab-elements.js`, `codelab-elements.css` and other files, +ready to be added to an HTML page like the following. Only relevant parts are shown: + +```html + + + + + + A codelab demo + + + + + + + + + Contents of the first step. + + + Contents of the second step. + + + + + + + + +``` + +You can download the latest version +from https://github.com/googlecodelabs/codelab-elements. + +## Dev environment + +All you need is [bazel](https://docs.bazel.build/versions/master/install.html). + +**Currently, the build process requires bazel version 0.18.1.** + +After bazel is installed, try executing the following: + + bazel test --test_output=all //codelab-elements/demo:hello_test + +It will take some time at the first run because bazel will download and compile +all dependencies needed to work with the code and run tests. This includes +Google Closure library and compiler, Go language and browsers to run local JS +tests on. + +### Building + +Check out a demo HelloElement target. To build the element, execute the following: + + bazel build //codelab-elements/demo:hello_bin + +It should output something like this: + + INFO: Analysed target //demo:hello_bin (0 packages loaded). + INFO: Found 1 target... + Target //demo:hello_bin up-to-date: + bazel-bin/demo/hello_bin.js + bazel-bin/demo/hello_bin.js.map + INFO: Elapsed time: 0.716s, Critical Path: 0.03s + INFO: Build completed successfully, 1 total action + +### Testing + +All elements should have their test targets. +As a starting point, check out HelloElement tests: + + bazel test --test_output=errors //codelab-elements/demo:hello_test + +You should see something like this: + + INFO: Elapsed time: 5.394s, Critical Path: 4.60s + INFO: Build completed successfully, 2 total actions + //codelab-elements/demo:hello_test_chromium-local PASSED in 4.6s + +When things go wrong, it is usually easier to inspect and analyze output +with debug enabled: + + bazel test -s --verbose_failures --test_output=all --test_arg=-debug codelab-elements/demo/hello_test + +### Manual inspection from a browser + +To browse things around manually with a real browser, execute the following: + + bazel run //codelab-elements/tools:server + +and navigate to http://localhost:8080. + +# Deploying the built artifacts to a CDN + +We now store the built artifacts in a world-readable Google Cloud Storage bucket (gs://codelab-elements). The list of artifacts we need to serve from this bucket are as follows: + +- codelab-elements.css +- native-shim.js +- custom-elements.min.js +- prettify.js +- codelab-elements.js + +The manual process for deploying these artifacts is as follows: + +``` +cd googlecodelabs/tools # start at repo level +bazel build //... # build everything +mkdir pkg +cd pkg +unzip ../bazel-genfiles/bundle.zip +export SRC="codelab-elements.css native-shim.js custom-elements.min.js prettify.js codelab-elements.js codelab-index.css codelab-index.js" +gsutil -m cp -a public-read $SRC gs://codelab-elements +``` +Then you need to include these artifacts using their full path, which is: + +`https://storage.googleapis.com/codelab-elements/FILE` + +where 'FILE' is replaced by one of the source files defined in the SRC variable above. + +Here's an index.html obtaining the codelab-elements from Google Cloud Storage: + +``` + + + + + + A codelab demo + + + + + + + + + Contents of the first step. + + + Contents of the second step. + + + + + + + + +``` + +## NPM + +The library is published on NPM.js at: https://www.npmjs.com/package/codelab-elements + +We also support a build workflow using NPM. To build the library run from the root of the repo: + +```bash +# Install dependencies. This takes care of installing the right version of Bazel. +npm install + +# Build the library +npm run build + +# The output is a zip file under bazel-genfiles +ls bazel-genfiles npm_dist.zip + +# Publish a new version of the library to NPM +npm run dist +``` + +## Notes + +This is not an official Google product. diff --git a/static/codelab-elements.css b/static/codelab-elements.css new file mode 100755 index 0000000..cd9ea35 --- /dev/null +++ b/static/codelab-elements.css @@ -0,0 +1,9 @@ +google-codelab-about .codelab-title{width:100%;text-align:center;font-size:32px;margin:20px auto 30px auto;line-height:45px;max-width:700px}google-codelab-about .codelab-title .token{display:inline-block;margin:0 5px}google-codelab-about .about-card{display:flex;flex-direction:column;border:1px #dadce0 solid;border-radius:5px;background:#fff;max-width:800px;margin:0 auto 30px auto;padding:20px}google-codelab-about .about-card h2{font-weight:500;font-weight:400 !important;line-height:1em 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");eb(a,ib(b));a.classList.add("card");b=new URL(a.href,document.location.origin); +b.searchParams.has("index")||b.searchParams.set("index",document.location.pathname);b=b.href;b instanceof B||b instanceof B||(b="object"==typeof b&&b.i?b.c():String(b),Fa.test(b)||(b="about:invalid#zClosurez"),b=Ga(b));a.href=b instanceof B&&b.constructor===B&&b.v===Ea?b.a:"type_error:SafeUrl";if(b=a.getAttribute("id"))b=this.j.get("progress_"+b),c=a.getAttribute("steps"),b&&c&&a.setAttribute("progress",(parseFloat(b)/parseFloat(c)-1).toFixed(2));this.appendChild(a)};P.prototype.addCard=P.prototype.G; +h.Object.defineProperties(P,{observedAttributes:{configurable:!0,enumerable:!0,get:function(){return["sort","filter","category","tags"]}}});try{window.customElements.define("google-codelab-index-cards",P)}catch(a){console.warn("googlecodelabs.CodelabIndex.Cards",a)};function R(){0!=ob&&(this[la]||(this[la]=++ma))}var ob=0;var pb;(pb=!I)||(pb=9<=Number(Va));var qb=pb,rb; +if(rb=I){var sb;if(Object.prototype.hasOwnProperty.call(Ua,"9"))sb=Ua["9"];else{for(var S=0,tb=va(String(J)).split("."),ub=va("9").split("."),vb=Math.max(tb.length,ub.length),T=0;0==S&&T=a.keyCode)a.keyCode=-1}catch(b){}};var Cb="closure_listenable_"+(1E6*Math.random()|0),Db=0;function Eb(a,b,c,d,e){this.listener=a;this.proxy=null;this.src=b;this.type=c;this.capture=!!d;this.a=e;this.key=++Db;this.o=this.A=!1}function Fb(a){a.o=!0;a.listener=null;a.proxy=null;a.src=null;a.a=null};function Gb(a){this.src=a;this.a={};this.b=0}Gb.prototype.add=function(a,b,c,d,e){var f=a.toString();a=this.a[f];a||(a=this.a[f]=[],this.b++);var g;a:{for(g=0;gd.keyCode||void 0!=d.returnValue)){a:{var e=!1;if(0==d.keyCode)try{d.keyCode=-1;break a}catch(g){e=!0}if(e||void 0==d.returnValue)d.returnValue=!0}d=[];for(e=b.a;e;e=e.parentNode)d.push(e);a=a.type;for(e=d.length-1;0<=e;e--){b.a=d[e];var f=Vb(d[e],a,!0,b);c=c&&f}for(e=0;e>>0);function Nb(a){if("function"==u(a))return a;a[Xb]||(a[Xb]=function(b){return a.handleEvent(b)});return a[Xb]};function Yb(a,b){if("function"!=u(a))if(a&&"function"==typeof a.handleEvent)a=w(a.handleEvent,a);else throw Error("Invalid listener argument");return 2147483647=} visitedImports\n */\nexport function walkDeepDescendantElements(root, callback, visitedImports = new Set()) {\n let node = root;\n while (node) {\n if (node.nodeType === Node.ELEMENT_NODE) {\n const element = /** @type {!Element} */(node);\n\n callback(element);\n\n const localName = element.localName;\n if (localName === 'link' && element.getAttribute('rel') === 'import') {\n // If this import (polyfilled or not) has it's root node available,\n // walk it.\n const importNode = /** @type {!Node} */ (element.import);\n if (importNode instanceof Node && !visitedImports.has(importNode)) {\n // Prevent multiple walks of the same import root.\n visitedImports.add(importNode);\n\n for (let child = importNode.firstChild; child; child = child.nextSibling) {\n walkDeepDescendantElements(child, callback, visitedImports);\n }\n }\n\n // Ignore descendants of import links to prevent attempting to walk the\n // elements created by the HTML Imports polyfill that we just walked\n // above.\n node = nextSiblingOrAncestorSibling(root, element);\n continue;\n } else if (localName === 'template') {\n // Ignore descendants of templates. There shouldn't be any descendants\n // because they will be moved into `.content` during construction in\n // browsers that support template but, in case they exist and are still\n // waiting to be moved by a polyfill, they will be ignored.\n node = nextSiblingOrAncestorSibling(root, element);\n continue;\n }\n\n // Walk shadow roots.\n const shadowRoot = element.__CE_shadowRoot;\n if (shadowRoot) {\n for (let child = shadowRoot.firstChild; child; child = child.nextSibling) {\n walkDeepDescendantElements(child, callback, visitedImports);\n }\n }\n }\n\n node = nextNode(root, node);\n }\n}\n\n/**\n * Used to suppress Closure's \"Modifying the prototype is only allowed if the\n * constructor is in the same scope\" warning without using\n * `@suppress {newCheckTypes, duplicate}` because `newCheckTypes` is too broad.\n *\n * @param {!Object} destination\n * @param {string} name\n * @param {*} value\n */\nexport function setPropertyUnchecked(destination, name, value) {\n destination[name] = value;\n}\n","import * as Utilities from './Utilities.js';\nimport CEState from './CustomElementState.js';\n\nexport default class CustomElementInternals {\n constructor() {\n /** @type {!Map} */\n this._localNameToDefinition = new Map();\n\n /** @type {!Map} */\n this._constructorToDefinition = new Map();\n\n /** @type {!Array} */\n this._patches = [];\n\n /** @type {boolean} */\n this._hasPatches = false;\n }\n\n /**\n * @param {string} localName\n * @param {!CustomElementDefinition} definition\n */\n setDefinition(localName, definition) {\n this._localNameToDefinition.set(localName, definition);\n this._constructorToDefinition.set(definition.constructor, definition);\n }\n\n /**\n * @param {string} localName\n * @return {!CustomElementDefinition|undefined}\n */\n localNameToDefinition(localName) {\n return this._localNameToDefinition.get(localName);\n }\n\n /**\n * @param {!Function} constructor\n * @return {!CustomElementDefinition|undefined}\n */\n constructorToDefinition(constructor) {\n return this._constructorToDefinition.get(constructor);\n }\n\n /**\n * @param {!function(!Node)} listener\n */\n addPatch(listener) {\n this._hasPatches = true;\n this._patches.push(listener);\n }\n\n /**\n * @param {!Node} node\n */\n patchTree(node) {\n if (!this._hasPatches) return;\n\n Utilities.walkDeepDescendantElements(node, element => this.patch(element));\n }\n\n /**\n * @param {!Node} node\n */\n patch(node) {\n if (!this._hasPatches) return;\n\n if (node.__CE_patched) return;\n node.__CE_patched = true;\n\n for (let i = 0; i < this._patches.length; i++) {\n this._patches[i](node);\n }\n }\n\n /**\n * @param {!Node} root\n */\n connectTree(root) {\n const elements = [];\n\n Utilities.walkDeepDescendantElements(root, element => elements.push(element));\n\n for (let i = 0; i < elements.length; i++) {\n const element = elements[i];\n if (element.__CE_state === CEState.custom) {\n this.connectedCallback(element);\n } else {\n this.upgradeElement(element);\n }\n }\n }\n\n /**\n * @param {!Node} root\n */\n disconnectTree(root) {\n const elements = [];\n\n Utilities.walkDeepDescendantElements(root, element => elements.push(element));\n\n for (let i = 0; i < elements.length; i++) {\n const element = elements[i];\n if (element.__CE_state === CEState.custom) {\n this.disconnectedCallback(element);\n }\n }\n }\n\n /**\n * Upgrades all uncustomized custom elements at and below a root node for\n * which there is a definition. When custom element reaction callbacks are\n * assumed to be called synchronously (which, by the current DOM / HTML spec\n * definitions, they are *not*), callbacks for both elements customized\n * synchronously by the parser and elements being upgraded occur in the same\n * relative order.\n *\n * NOTE: This function, when used to simulate the construction of a tree that\n * is already created but not customized (i.e. by the parser), does *not*\n * prevent the element from reading the 'final' (true) state of the tree. For\n * example, the element, during truly synchronous parsing / construction would\n * see that it contains no children as they have not yet been inserted.\n * However, this function does not modify the tree, the element will\n * (incorrectly) have children. Additionally, self-modification restrictions\n * for custom element constructors imposed by the DOM spec are *not* enforced.\n *\n *\n * The following nested list shows the steps extending down from the HTML\n * spec's parsing section that cause elements to be synchronously created and\n * upgraded:\n *\n * The \"in body\" insertion mode:\n * https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody\n * - Switch on token:\n * .. other cases ..\n * -> Any other start tag\n * - [Insert an HTML element](below) for the token.\n *\n * Insert an HTML element:\n * https://html.spec.whatwg.org/multipage/syntax.html#insert-an-html-element\n * - Insert a foreign element for the token in the HTML namespace:\n * https://html.spec.whatwg.org/multipage/syntax.html#insert-a-foreign-element\n * - Create an element for a token:\n * https://html.spec.whatwg.org/multipage/syntax.html#create-an-element-for-the-token\n * - Will execute script flag is true?\n * - (Element queue pushed to the custom element reactions stack.)\n * - Create an element:\n * https://dom.spec.whatwg.org/#concept-create-element\n * - Sync CE flag is true?\n * - Constructor called.\n * - Self-modification restrictions enforced.\n * - Sync CE flag is false?\n * - (Upgrade reaction enqueued.)\n * - Attributes appended to element.\n * (`attributeChangedCallback` reactions enqueued.)\n * - Will execute script flag is true?\n * - (Element queue popped from the custom element reactions stack.\n * Reactions in the popped stack are invoked.)\n * - (Element queue pushed to the custom element reactions stack.)\n * - Insert the element:\n * https://dom.spec.whatwg.org/#concept-node-insert\n * - Shadow-including descendants are connected. During parsing\n * construction, there are no shadow-*excluding* descendants.\n * However, the constructor may have validly attached a shadow\n * tree to itself and added descendants to that shadow tree.\n * (`connectedCallback` reactions enqueued.)\n * - (Element queue popped from the custom element reactions stack.\n * Reactions in the popped stack are invoked.)\n *\n * @param {!Node} root\n * @param {{\n * visitedImports: (!Set|undefined),\n * upgrade: (!function(!Element)|undefined),\n * }=} options\n */\n patchAndUpgradeTree(root, options = {}) {\n const visitedImports = options.visitedImports || new Set();\n const upgrade = options.upgrade || (element => this.upgradeElement(element));\n\n const elements = [];\n\n const gatherElements = element => {\n if (element.localName === 'link' && element.getAttribute('rel') === 'import') {\n // The HTML Imports polyfill sets a descendant element of the link to\n // the `import` property, specifically this is *not* a Document.\n const importNode = /** @type {?Node} */ (element.import);\n\n if (importNode instanceof Node) {\n importNode.__CE_isImportDocument = true;\n // Connected links are associated with the registry.\n importNode.__CE_hasRegistry = true;\n }\n\n if (importNode && importNode.readyState === 'complete') {\n importNode.__CE_documentLoadHandled = true;\n } else {\n // If this link's import root is not available, its contents can't be\n // walked. Wait for 'load' and walk it when it's ready.\n element.addEventListener('load', () => {\n const importNode = /** @type {!Node} */ (element.import);\n\n if (importNode.__CE_documentLoadHandled) return;\n importNode.__CE_documentLoadHandled = true;\n\n // Clone the `visitedImports` set that was populated sync during\n // the `patchAndUpgradeTree` call that caused this 'load' handler to\n // be added. Then, remove *this* link's import node so that we can\n // walk that import again, even if it was partially walked later\n // during the same `patchAndUpgradeTree` call.\n const clonedVisitedImports = new Set(visitedImports);\n clonedVisitedImports.delete(importNode);\n\n this.patchAndUpgradeTree(importNode, {visitedImports: clonedVisitedImports, upgrade});\n });\n }\n } else {\n elements.push(element);\n }\n };\n\n // `walkDeepDescendantElements` populates (and internally checks against)\n // `visitedImports` when traversing a loaded import.\n Utilities.walkDeepDescendantElements(root, gatherElements, visitedImports);\n\n if (this._hasPatches) {\n for (let i = 0; i < elements.length; i++) {\n this.patch(elements[i]);\n }\n }\n\n for (let i = 0; i < elements.length; i++) {\n upgrade(elements[i]);\n }\n }\n\n /**\n * @param {!Element} element\n */\n upgradeElement(element) {\n const currentState = element.__CE_state;\n if (currentState !== undefined) return;\n\n // Prevent elements created in documents without a browsing context from\n // upgrading.\n //\n // https://html.spec.whatwg.org/multipage/custom-elements.html#look-up-a-custom-element-definition\n // \"If document does not have a browsing context, return null.\"\n //\n // https://html.spec.whatwg.org/multipage/window-object.html#dom-document-defaultview\n // \"The defaultView IDL attribute of the Document interface, on getting,\n // must return this Document's browsing context's WindowProxy object, if\n // this Document has an associated browsing context, or null otherwise.\"\n const ownerDocument = element.ownerDocument;\n if (\n !ownerDocument.defaultView &&\n !(ownerDocument.__CE_isImportDocument && ownerDocument.__CE_hasRegistry)\n ) return;\n\n const definition = this.localNameToDefinition(element.localName);\n if (!definition) return;\n\n definition.constructionStack.push(element);\n\n const constructor = definition.constructor;\n try {\n try {\n let result = new (constructor)();\n if (result !== element) {\n throw new Error('The custom element constructor did not produce the element being upgraded.');\n }\n } finally {\n definition.constructionStack.pop();\n }\n } catch (e) {\n element.__CE_state = CEState.failed;\n throw e;\n }\n\n element.__CE_state = CEState.custom;\n element.__CE_definition = definition;\n\n if (definition.attributeChangedCallback) {\n const observedAttributes = definition.observedAttributes;\n for (let i = 0; i < observedAttributes.length; i++) {\n const name = observedAttributes[i];\n const value = element.getAttribute(name);\n if (value !== null) {\n this.attributeChangedCallback(element, name, null, value, null);\n }\n }\n }\n\n if (Utilities.isConnected(element)) {\n this.connectedCallback(element);\n }\n }\n\n /**\n * @param {!Element} element\n */\n connectedCallback(element) {\n const definition = element.__CE_definition;\n if (definition.connectedCallback) {\n definition.connectedCallback.call(element);\n }\n }\n\n /**\n * @param {!Element} element\n */\n disconnectedCallback(element) {\n const definition = element.__CE_definition;\n if (definition.disconnectedCallback) {\n definition.disconnectedCallback.call(element);\n }\n }\n\n /**\n * @param {!Element} element\n * @param {string} name\n * @param {?string} oldValue\n * @param {?string} newValue\n * @param {?string} namespace\n */\n attributeChangedCallback(element, name, oldValue, newValue, namespace) {\n const definition = element.__CE_definition;\n if (\n definition.attributeChangedCallback &&\n definition.observedAttributes.indexOf(name) > -1\n ) {\n definition.attributeChangedCallback.call(element, name, oldValue, newValue, namespace);\n }\n }\n}\n","/**\n * @enum {number}\n */\nconst CustomElementState = {\n custom: 1,\n failed: 2,\n};\n\nexport default CustomElementState;\n","import CustomElementInternals from './CustomElementInternals.js';\n\nexport default class DocumentConstructionObserver {\n constructor(internals, doc) {\n /**\n * @type {!CustomElementInternals}\n */\n this._internals = internals;\n\n /**\n * @type {!Document}\n */\n this._document = doc;\n\n /**\n * @type {MutationObserver|undefined}\n */\n this._observer = undefined;\n\n\n // Simulate tree construction for all currently accessible nodes in the\n // document.\n this._internals.patchAndUpgradeTree(this._document);\n\n if (this._document.readyState === 'loading') {\n this._observer = new MutationObserver(this._handleMutations.bind(this));\n\n // Nodes created by the parser are given to the observer *before* the next\n // task runs. Inline scripts are run in a new task. This means that the\n // observer will be able to handle the newly parsed nodes before the inline\n // script is run.\n this._observer.observe(this._document, {\n childList: true,\n subtree: true,\n });\n }\n }\n\n disconnect() {\n if (this._observer) {\n this._observer.disconnect();\n }\n }\n\n /**\n * @param {!Array} mutations\n */\n _handleMutations(mutations) {\n // Once the document's `readyState` is 'interactive' or 'complete', all new\n // nodes created within that document will be the result of script and\n // should be handled by patching.\n const readyState = this._document.readyState;\n if (readyState === 'interactive' || readyState === 'complete') {\n this.disconnect();\n }\n\n for (let i = 0; i < mutations.length; i++) {\n const addedNodes = mutations[i].addedNodes;\n for (let j = 0; j < addedNodes.length; j++) {\n const node = addedNodes[j];\n this._internals.patchAndUpgradeTree(node);\n }\n }\n }\n}\n","/**\n * @template T\n */\nexport default class Deferred {\n constructor() {\n /**\n * @private\n * @type {T|undefined}\n */\n this._value = undefined;\n\n /**\n * @private\n * @type {Function|undefined}\n */\n this._resolve = undefined;\n\n /**\n * @private\n * @type {!Promise}\n */\n this._promise = new Promise(resolve => {\n this._resolve = resolve;\n\n if (this._value) {\n resolve(this._value);\n }\n });\n }\n\n /**\n * @param {T} value\n */\n resolve(value) {\n if (this._value) {\n throw new Error('Already resolved.');\n }\n\n this._value = value;\n\n if (this._resolve) {\n this._resolve(value);\n }\n }\n\n /**\n * @return {!Promise}\n */\n toPromise() {\n return this._promise;\n }\n}\n","import CustomElementInternals from './CustomElementInternals.js';\nimport DocumentConstructionObserver from './DocumentConstructionObserver.js';\nimport Deferred from './Deferred.js';\nimport * as Utilities from './Utilities.js';\n\n/**\n * @unrestricted\n */\nexport default class CustomElementRegistry {\n\n /**\n * @param {!CustomElementInternals} internals\n */\n constructor(internals) {\n /**\n * @private\n * @type {boolean}\n */\n this._elementDefinitionIsRunning = false;\n\n /**\n * @private\n * @type {!CustomElementInternals}\n */\n this._internals = internals;\n\n /**\n * @private\n * @type {!Map>}\n */\n this._whenDefinedDeferred = new Map();\n\n /**\n * The default flush callback triggers the document walk synchronously.\n * @private\n * @type {!Function}\n */\n this._flushCallback = fn => fn();\n\n /**\n * @private\n * @type {boolean}\n */\n this._flushPending = false;\n\n /**\n * @private\n * @type {!Array}\n */\n this._pendingDefinitions = [];\n\n /**\n * @private\n * @type {!DocumentConstructionObserver}\n */\n this._documentConstructionObserver = new DocumentConstructionObserver(internals, document);\n }\n\n /**\n * @param {string} localName\n * @param {!Function} constructor\n */\n define(localName, constructor) {\n if (!(constructor instanceof Function)) {\n throw new TypeError('Custom element constructors must be functions.');\n }\n\n if (!Utilities.isValidCustomElementName(localName)) {\n throw new SyntaxError(`The element name '${localName}' is not valid.`);\n }\n\n if (this._internals.localNameToDefinition(localName)) {\n throw new Error(`A custom element with name '${localName}' has already been defined.`);\n }\n\n if (this._elementDefinitionIsRunning) {\n throw new Error('A custom element is already being defined.');\n }\n this._elementDefinitionIsRunning = true;\n\n let connectedCallback;\n let disconnectedCallback;\n let adoptedCallback;\n let attributeChangedCallback;\n let observedAttributes;\n try {\n /** @type {!Object} */\n const prototype = constructor.prototype;\n if (!(prototype instanceof Object)) {\n throw new TypeError('The custom element constructor\\'s prototype is not an object.');\n }\n\n function getCallback(name) {\n const callbackValue = prototype[name];\n if (callbackValue !== undefined && !(callbackValue instanceof Function)) {\n throw new Error(`The '${name}' callback must be a function.`);\n }\n return callbackValue;\n }\n\n connectedCallback = getCallback('connectedCallback');\n disconnectedCallback = getCallback('disconnectedCallback');\n adoptedCallback = getCallback('adoptedCallback');\n attributeChangedCallback = getCallback('attributeChangedCallback');\n observedAttributes = constructor['observedAttributes'] || [];\n } catch (e) {\n return;\n } finally {\n this._elementDefinitionIsRunning = false;\n }\n\n const definition = {\n localName,\n constructor,\n connectedCallback,\n disconnectedCallback,\n adoptedCallback,\n attributeChangedCallback,\n observedAttributes,\n constructionStack: [],\n };\n\n this._internals.setDefinition(localName, definition);\n this._pendingDefinitions.push(definition);\n\n // If we've already called the flush callback and it hasn't called back yet,\n // don't call it again.\n if (!this._flushPending) {\n this._flushPending = true;\n this._flushCallback(() => this._flush());\n }\n }\n\n _flush() {\n // If no new definitions were defined, don't attempt to flush. This could\n // happen if a flush callback keeps the function it is given and calls it\n // multiple times.\n if (this._flushPending === false) return;\n this._flushPending = false;\n\n const pendingDefinitions = this._pendingDefinitions;\n\n /**\n * Unupgraded elements with definitions that were defined *before* the last\n * flush, in document order.\n * @type {!Array}\n */\n const elementsWithStableDefinitions = [];\n\n /**\n * A map from `localName`s of definitions that were defined *after* the last\n * flush to unupgraded elements matching that definition, in document order.\n * @type {!Map>}\n */\n const elementsWithPendingDefinitions = new Map();\n for (let i = 0; i < pendingDefinitions.length; i++) {\n elementsWithPendingDefinitions.set(pendingDefinitions[i].localName, []);\n }\n\n this._internals.patchAndUpgradeTree(document, {\n upgrade: element => {\n // Ignore the element if it has already upgraded or failed to upgrade.\n if (element.__CE_state !== undefined) return;\n\n const localName = element.localName;\n\n // If there is an applicable pending definition for the element, add the\n // element to the list of elements to be upgraded with that definition.\n const pendingElements = elementsWithPendingDefinitions.get(localName);\n if (pendingElements) {\n pendingElements.push(element);\n // If there is *any other* applicable definition for the element, add it\n // to the list of elements with stable definitions that need to be upgraded.\n } else if (this._internals.localNameToDefinition(localName)) {\n elementsWithStableDefinitions.push(element);\n }\n },\n });\n\n // Upgrade elements with 'stable' definitions first.\n for (let i = 0; i < elementsWithStableDefinitions.length; i++) {\n this._internals.upgradeElement(elementsWithStableDefinitions[i]);\n }\n\n // Upgrade elements with 'pending' definitions in the order they were defined.\n while (pendingDefinitions.length > 0) {\n const definition = pendingDefinitions.shift();\n const localName = definition.localName;\n\n // Attempt to upgrade all applicable elements.\n const pendingUpgradableElements = elementsWithPendingDefinitions.get(definition.localName);\n for (let i = 0; i < pendingUpgradableElements.length; i++) {\n this._internals.upgradeElement(pendingUpgradableElements[i]);\n }\n\n // Resolve any promises created by `whenDefined` for the definition.\n const deferred = this._whenDefinedDeferred.get(localName);\n if (deferred) {\n deferred.resolve(undefined);\n }\n }\n }\n\n /**\n * @param {string} localName\n * @return {Function|undefined}\n */\n get(localName) {\n const definition = this._internals.localNameToDefinition(localName);\n if (definition) {\n return definition.constructor;\n }\n\n return undefined;\n }\n\n /**\n * @param {string} localName\n * @return {!Promise}\n */\n whenDefined(localName) {\n if (!Utilities.isValidCustomElementName(localName)) {\n return Promise.reject(new SyntaxError(`'${localName}' is not a valid custom element name.`));\n }\n\n const prior = this._whenDefinedDeferred.get(localName);\n if (prior) {\n return prior.toPromise();\n }\n\n const deferred = new Deferred();\n this._whenDefinedDeferred.set(localName, deferred);\n\n const definition = this._internals.localNameToDefinition(localName);\n // Resolve immediately only if the given local name has a definition *and*\n // the full document walk to upgrade elements with that local name has\n // already happened.\n if (definition && !this._pendingDefinitions.some(d => d.localName === localName)) {\n deferred.resolve(undefined);\n }\n\n return deferred.toPromise();\n }\n\n polyfillWrapFlushCallback(outer) {\n this._documentConstructionObserver.disconnect();\n const inner = this._flushCallback;\n this._flushCallback = flush => outer(() => inner(flush));\n }\n}\n\n// Closure compiler exports.\nwindow['CustomElementRegistry'] = CustomElementRegistry;\nCustomElementRegistry.prototype['define'] = CustomElementRegistry.prototype.define;\nCustomElementRegistry.prototype['get'] = CustomElementRegistry.prototype.get;\nCustomElementRegistry.prototype['whenDefined'] = CustomElementRegistry.prototype.whenDefined;\nCustomElementRegistry.prototype['polyfillWrapFlushCallback'] = CustomElementRegistry.prototype.polyfillWrapFlushCallback;\n","export default {\n Document_createElement: window.Document.prototype.createElement,\n Document_createElementNS: window.Document.prototype.createElementNS,\n Document_importNode: window.Document.prototype.importNode,\n Document_prepend: window.Document.prototype['prepend'],\n Document_append: window.Document.prototype['append'],\n DocumentFragment_prepend: window.DocumentFragment.prototype['prepend'],\n DocumentFragment_append: window.DocumentFragment.prototype['append'],\n Node_cloneNode: window.Node.prototype.cloneNode,\n Node_appendChild: window.Node.prototype.appendChild,\n Node_insertBefore: window.Node.prototype.insertBefore,\n Node_removeChild: window.Node.prototype.removeChild,\n Node_replaceChild: window.Node.prototype.replaceChild,\n Node_textContent: Object.getOwnPropertyDescriptor(window.Node.prototype, 'textContent'),\n Element_attachShadow: window.Element.prototype['attachShadow'],\n Element_innerHTML: Object.getOwnPropertyDescriptor(window.Element.prototype, 'innerHTML'),\n Element_getAttribute: window.Element.prototype.getAttribute,\n Element_setAttribute: window.Element.prototype.setAttribute,\n Element_removeAttribute: window.Element.prototype.removeAttribute,\n Element_getAttributeNS: window.Element.prototype.getAttributeNS,\n Element_setAttributeNS: window.Element.prototype.setAttributeNS,\n Element_removeAttributeNS: window.Element.prototype.removeAttributeNS,\n Element_insertAdjacentElement: window.Element.prototype['insertAdjacentElement'],\n Element_prepend: window.Element.prototype['prepend'],\n Element_append: window.Element.prototype['append'],\n Element_before: window.Element.prototype['before'],\n Element_after: window.Element.prototype['after'],\n Element_replaceWith: window.Element.prototype['replaceWith'],\n Element_remove: window.Element.prototype['remove'],\n HTMLElement: window.HTMLElement,\n HTMLElement_innerHTML: Object.getOwnPropertyDescriptor(window.HTMLElement.prototype, 'innerHTML'),\n HTMLElement_insertAdjacentElement: window.HTMLElement.prototype['insertAdjacentElement'],\n};\n","import Native from './Native.js';\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport CEState from '../CustomElementState.js';\nimport AlreadyConstructedMarker from '../AlreadyConstructedMarker.js';\n\n/**\n * @param {!CustomElementInternals} internals\n */\nexport default function(internals) {\n window['HTMLElement'] = (function() {\n /**\n * @type {function(new: HTMLElement): !HTMLElement}\n */\n function HTMLElement() {\n // This should really be `new.target` but `new.target` can't be emulated\n // in ES5. Assuming the user keeps the default value of the constructor's\n // prototype's `constructor` property, this is equivalent.\n /** @type {!Function} */\n const constructor = this.constructor;\n\n const definition = internals.constructorToDefinition(constructor);\n if (!definition) {\n throw new Error('The custom element being constructed was not registered with `customElements`.');\n }\n\n const constructionStack = definition.constructionStack;\n\n if (constructionStack.length === 0) {\n const element = Native.Document_createElement.call(document, definition.localName);\n Object.setPrototypeOf(element, constructor.prototype);\n element.__CE_state = CEState.custom;\n element.__CE_definition = definition;\n internals.patch(element);\n return element;\n }\n\n const lastIndex = constructionStack.length - 1;\n const element = constructionStack[lastIndex];\n if (element === AlreadyConstructedMarker) {\n throw new Error('The HTMLElement constructor was either called reentrantly for this constructor or called multiple times.');\n }\n constructionStack[lastIndex] = AlreadyConstructedMarker;\n\n Object.setPrototypeOf(element, constructor.prototype);\n internals.patch(/** @type {!HTMLElement} */ (element));\n\n return element;\n }\n\n HTMLElement.prototype = Native.HTMLElement.prototype;\n\n return HTMLElement;\n })();\n};\n","/**\n * @license\n * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.\n * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt\n * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt\n * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt\n * Code distributed by Google as part of the polymer project is also\n * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt\n */\n\nimport CustomElementInternals from './CustomElementInternals.js';\nimport CustomElementRegistry from './CustomElementRegistry.js';\n\nimport PatchHTMLElement from './Patch/HTMLElement.js';\nimport PatchDocument from './Patch/Document.js';\nimport PatchDocumentFragment from './Patch/DocumentFragment.js';\nimport PatchNode from './Patch/Node.js';\nimport PatchElement from './Patch/Element.js';\n\nconst priorCustomElements = window['customElements'];\n\nif (!priorCustomElements ||\n priorCustomElements['forcePolyfill'] ||\n (typeof priorCustomElements['define'] != 'function') ||\n (typeof priorCustomElements['get'] != 'function')) {\n /** @type {!CustomElementInternals} */\n const internals = new CustomElementInternals();\n\n PatchHTMLElement(internals);\n PatchDocument(internals);\n PatchDocumentFragment(internals);\n PatchNode(internals);\n PatchElement(internals);\n\n // The main document is always associated with the registry.\n document.__CE_hasRegistry = true;\n\n /** @type {!CustomElementRegistry} */\n const customElements = new CustomElementRegistry(internals);\n\n Object.defineProperty(window, 'customElements', {\n configurable: true,\n enumerable: true,\n value: customElements,\n });\n}\n","import CustomElementInternals from '../../CustomElementInternals.js';\nimport * as Utilities from '../../Utilities.js';\n\n/**\n * @typedef {{\n * prepend: !function(...(!Node|string)),\n * append: !function(...(!Node|string)),\n * }}\n */\nlet ParentNodeNativeMethods;\n\n/**\n * @param {!CustomElementInternals} internals\n * @param {!Object} destination\n * @param {!ParentNodeNativeMethods} builtIn\n */\nexport default function(internals, destination, builtIn) {\n /**\n * @param {!function(...(!Node|string))} builtInMethod\n * @return {!function(...(!Node|string))}\n */\n function appendPrependPatch(builtInMethod) {\n return function(...nodes) {\n /**\n * A copy of `nodes`, with any DocumentFragment replaced by its children.\n * @type {!Array}\n */\n const flattenedNodes = [];\n\n /**\n * Elements in `nodes` that were connected before this call.\n * @type {!Array}\n */\n const connectedElements = [];\n\n for (var i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n builtInMethod.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n };\n }\n\n if (builtIn.prepend !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'prepend', appendPrependPatch(builtIn.prepend));\n }\n\n if (builtIn.append !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'append', appendPrependPatch(builtIn.append));\n }\n};\n","import Native from './Native.js';\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport * as Utilities from '../Utilities.js';\n\nimport PatchParentNode from './Interface/ParentNode.js';\n\n/**\n * @param {!CustomElementInternals} internals\n */\nexport default function(internals) {\n Utilities.setPropertyUnchecked(Document.prototype, 'createElement',\n /**\n * @this {Document}\n * @param {string} localName\n * @return {!Element}\n */\n function(localName) {\n // Only create custom elements if this document is associated with the registry.\n if (this.__CE_hasRegistry) {\n const definition = internals.localNameToDefinition(localName);\n if (definition) {\n return new (definition.constructor)();\n }\n }\n\n const result = /** @type {!Element} */\n (Native.Document_createElement.call(this, localName));\n internals.patch(result);\n return result;\n });\n\n Utilities.setPropertyUnchecked(Document.prototype, 'importNode',\n /**\n * @this {Document}\n * @param {!Node} node\n * @param {boolean=} deep\n * @return {!Node}\n */\n function(node, deep) {\n const clone = Native.Document_importNode.call(this, node, deep);\n // Only create custom elements if this document is associated with the registry.\n if (!this.__CE_hasRegistry) {\n internals.patchTree(clone);\n } else {\n internals.patchAndUpgradeTree(clone);\n }\n return clone;\n });\n\n const NS_HTML = \"http://www.w3.org/1999/xhtml\";\n\n Utilities.setPropertyUnchecked(Document.prototype, 'createElementNS',\n /**\n * @this {Document}\n * @param {?string} namespace\n * @param {string} localName\n * @return {!Element}\n */\n function(namespace, localName) {\n // Only create custom elements if this document is associated with the registry.\n if (this.__CE_hasRegistry && (namespace === null || namespace === NS_HTML)) {\n const definition = internals.localNameToDefinition(localName);\n if (definition) {\n return new (definition.constructor)();\n }\n }\n\n const result = /** @type {!Element} */\n (Native.Document_createElementNS.call(this, namespace, localName));\n internals.patch(result);\n return result;\n });\n\n PatchParentNode(internals, Document.prototype, {\n prepend: Native.Document_prepend,\n append: Native.Document_append,\n });\n};\n","import Native from './Native.js';\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport * as Utilities from '../Utilities.js';\n\n/**\n * @param {!CustomElementInternals} internals\n */\nexport default function(internals) {\n // `Node#nodeValue` is implemented on `Attr`.\n // `Node#textContent` is implemented on `Attr`, `Element`.\n\n Utilities.setPropertyUnchecked(Node.prototype, 'insertBefore',\n /**\n * @this {Node}\n * @param {!Node} node\n * @param {?Node} refNode\n * @return {!Node}\n */\n function(node, refNode) {\n if (node instanceof DocumentFragment) {\n const insertedNodes = Array.prototype.slice.apply(node.childNodes);\n const nativeResult = Native.Node_insertBefore.call(this, node, refNode);\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult;\n }\n\n const nodeWasConnected = Utilities.isConnected(node);\n const nativeResult = Native.Node_insertBefore.call(this, node, refNode);\n\n if (nodeWasConnected) {\n internals.disconnectTree(node);\n }\n\n if (Utilities.isConnected(this)) {\n internals.connectTree(node);\n }\n\n return nativeResult;\n });\n\n Utilities.setPropertyUnchecked(Node.prototype, 'appendChild',\n /**\n * @this {Node}\n * @param {!Node} node\n * @return {!Node}\n */\n function(node) {\n if (node instanceof DocumentFragment) {\n const insertedNodes = Array.prototype.slice.apply(node.childNodes);\n const nativeResult = Native.Node_appendChild.call(this, node);\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult;\n }\n\n const nodeWasConnected = Utilities.isConnected(node);\n const nativeResult = Native.Node_appendChild.call(this, node);\n\n if (nodeWasConnected) {\n internals.disconnectTree(node);\n }\n\n if (Utilities.isConnected(this)) {\n internals.connectTree(node);\n }\n\n return nativeResult;\n });\n\n Utilities.setPropertyUnchecked(Node.prototype, 'cloneNode',\n /**\n * @this {Node}\n * @param {boolean=} deep\n * @return {!Node}\n */\n function(deep) {\n const clone = Native.Node_cloneNode.call(this, deep);\n // Only create custom elements if this element's owner document is\n // associated with the registry.\n if (!this.ownerDocument.__CE_hasRegistry) {\n internals.patchTree(clone);\n } else {\n internals.patchAndUpgradeTree(clone);\n }\n return clone;\n });\n\n Utilities.setPropertyUnchecked(Node.prototype, 'removeChild',\n /**\n * @this {Node}\n * @param {!Node} node\n * @return {!Node}\n */\n function(node) {\n const nodeWasConnected = Utilities.isConnected(node);\n const nativeResult = Native.Node_removeChild.call(this, node);\n\n if (nodeWasConnected) {\n internals.disconnectTree(node);\n }\n\n return nativeResult;\n });\n\n Utilities.setPropertyUnchecked(Node.prototype, 'replaceChild',\n /**\n * @this {Node}\n * @param {!Node} nodeToInsert\n * @param {!Node} nodeToRemove\n * @return {!Node}\n */\n function(nodeToInsert, nodeToRemove) {\n if (nodeToInsert instanceof DocumentFragment) {\n const insertedNodes = Array.prototype.slice.apply(nodeToInsert.childNodes);\n const nativeResult = Native.Node_replaceChild.call(this, nodeToInsert, nodeToRemove);\n\n // DocumentFragments can't be connected, so `disconnectTree` will never\n // need to be called on a DocumentFragment's children after inserting it.\n\n if (Utilities.isConnected(this)) {\n internals.disconnectTree(nodeToRemove);\n for (let i = 0; i < insertedNodes.length; i++) {\n internals.connectTree(insertedNodes[i]);\n }\n }\n\n return nativeResult;\n }\n\n const nodeToInsertWasConnected = Utilities.isConnected(nodeToInsert);\n const nativeResult = Native.Node_replaceChild.call(this, nodeToInsert, nodeToRemove);\n const thisIsConnected = Utilities.isConnected(this);\n\n if (thisIsConnected) {\n internals.disconnectTree(nodeToRemove);\n }\n\n if (nodeToInsertWasConnected) {\n internals.disconnectTree(nodeToInsert);\n }\n\n if (thisIsConnected) {\n internals.connectTree(nodeToInsert);\n }\n\n return nativeResult;\n });\n\n\n function patch_textContent(destination, baseDescriptor) {\n Object.defineProperty(destination, 'textContent', {\n enumerable: baseDescriptor.enumerable,\n configurable: true,\n get: baseDescriptor.get,\n set: /** @this {Node} */ function(assignedValue) {\n // If this is a text node then there are no nodes to disconnect.\n if (this.nodeType === Node.TEXT_NODE) {\n baseDescriptor.set.call(this, assignedValue);\n return;\n }\n\n let removedNodes = undefined;\n // Checking for `firstChild` is faster than reading `childNodes.length`\n // to compare with 0.\n if (this.firstChild) {\n // Using `childNodes` is faster than `children`, even though we only\n // care about elements.\n const childNodes = this.childNodes;\n const childNodesLength = childNodes.length;\n if (childNodesLength > 0 && Utilities.isConnected(this)) {\n // Copying an array by iterating is faster than using slice.\n removedNodes = new Array(childNodesLength);\n for (let i = 0; i < childNodesLength; i++) {\n removedNodes[i] = childNodes[i];\n }\n }\n }\n\n baseDescriptor.set.call(this, assignedValue);\n\n if (removedNodes) {\n for (let i = 0; i < removedNodes.length; i++) {\n internals.disconnectTree(removedNodes[i]);\n }\n }\n },\n });\n }\n\n if (Native.Node_textContent && Native.Node_textContent.get) {\n patch_textContent(Node.prototype, Native.Node_textContent);\n } else {\n internals.addPatch(function(element) {\n patch_textContent(element, {\n enumerable: true,\n configurable: true,\n // NOTE: This implementation of the `textContent` getter assumes that\n // text nodes' `textContent` getter will not be patched.\n get: /** @this {Node} */ function() {\n /** @type {!Array} */\n const parts = [];\n\n for (let i = 0; i < this.childNodes.length; i++) {\n parts.push(this.childNodes[i].textContent);\n }\n\n return parts.join('');\n },\n set: /** @this {Node} */ function(assignedValue) {\n while (this.firstChild) {\n Native.Node_removeChild.call(this, this.firstChild);\n }\n Native.Node_appendChild.call(this, document.createTextNode(assignedValue));\n },\n });\n });\n }\n};\n","import CustomElementInternals from '../../CustomElementInternals.js';\nimport * as Utilities from '../../Utilities.js';\n\n/**\n * @typedef {{\n * before: !function(...(!Node|string)),\n * after: !function(...(!Node|string)),\n * replaceWith: !function(...(!Node|string)),\n * remove: !function(),\n * }}\n */\nlet ChildNodeNativeMethods;\n\n/**\n * @param {!CustomElementInternals} internals\n * @param {!Object} destination\n * @param {!ChildNodeNativeMethods} builtIn\n */\nexport default function(internals, destination, builtIn) {\n /**\n * @param {!function(...(!Node|string))} builtInMethod\n * @return {!function(...(!Node|string))}\n */\n function beforeAfterPatch(builtInMethod) {\n return function(...nodes) {\n /**\n * A copy of `nodes`, with any DocumentFragment replaced by its children.\n * @type {!Array}\n */\n const flattenedNodes = [];\n\n /**\n * Elements in `nodes` that were connected before this call.\n * @type {!Array}\n */\n const connectedElements = [];\n\n for (var i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n builtInMethod.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (Utilities.isConnected(this)) {\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n };\n }\n\n if (builtIn.before !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'before', beforeAfterPatch(builtIn.before));\n }\n\n if (builtIn.before !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'after', beforeAfterPatch(builtIn.after));\n }\n\n if (builtIn.replaceWith !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'replaceWith',\n /**\n * @param {...(!Node|string)} nodes\n */\n function(...nodes) {\n /**\n * A copy of `nodes`, with any DocumentFragment replaced by its children.\n * @type {!Array}\n */\n const flattenedNodes = [];\n\n /**\n * Elements in `nodes` that were connected before this call.\n * @type {!Array}\n */\n const connectedElements = [];\n\n for (var i = 0; i < nodes.length; i++) {\n const node = nodes[i];\n\n if (node instanceof Element && Utilities.isConnected(node)) {\n connectedElements.push(node);\n }\n\n if (node instanceof DocumentFragment) {\n for (let child = node.firstChild; child; child = child.nextSibling) {\n flattenedNodes.push(child);\n }\n } else {\n flattenedNodes.push(node);\n }\n }\n\n const wasConnected = Utilities.isConnected(this);\n\n builtIn.replaceWith.apply(this, nodes);\n\n for (let i = 0; i < connectedElements.length; i++) {\n internals.disconnectTree(connectedElements[i]);\n }\n\n if (wasConnected) {\n internals.disconnectTree(this);\n for (let i = 0; i < flattenedNodes.length; i++) {\n const node = flattenedNodes[i];\n if (node instanceof Element) {\n internals.connectTree(node);\n }\n }\n }\n });\n }\n\n if (builtIn.remove !== undefined) {\n Utilities.setPropertyUnchecked(destination, 'remove',\n function() {\n const wasConnected = Utilities.isConnected(this);\n\n builtIn.remove.call(this);\n\n if (wasConnected) {\n internals.disconnectTree(this);\n }\n });\n }\n};\n","import Native from './Native.js';\nimport CustomElementInternals from '../CustomElementInternals.js';\nimport CEState from '../CustomElementState.js';\nimport * as Utilities from '../Utilities.js';\n\nimport PatchParentNode from './Interface/ParentNode.js';\nimport PatchChildNode from './Interface/ChildNode.js';\n\n/**\n * @param {!CustomElementInternals} internals\n */\nexport default function(internals) {\n if (Native.Element_attachShadow) {\n Utilities.setPropertyUnchecked(Element.prototype, 'attachShadow',\n /**\n * @this {Element}\n * @param {!{mode: string}} init\n * @return {ShadowRoot}\n */\n function(init) {\n const shadowRoot = Native.Element_attachShadow.call(this, init);\n this.__CE_shadowRoot = shadowRoot;\n return shadowRoot;\n });\n }\n\n\n function patch_innerHTML(destination, baseDescriptor) {\n Object.defineProperty(destination, 'innerHTML', {\n enumerable: baseDescriptor.enumerable,\n configurable: true,\n get: baseDescriptor.get,\n set: /** @this {Element} */ function(htmlString) {\n const isConnected = Utilities.isConnected(this);\n\n // NOTE: In IE11, when using the native `innerHTML` setter, all nodes\n // that were previously descendants of the context element have all of\n // their children removed as part of the set - the entire subtree is\n // 'disassembled'. This work around walks the subtree *before* using the\n // native setter.\n /** @type {!Array|undefined} */\n let removedElements = undefined;\n if (isConnected) {\n removedElements = [];\n Utilities.walkDeepDescendantElements(this, element => {\n if (element !== this) {\n removedElements.push(element);\n }\n });\n }\n\n baseDescriptor.set.call(this, htmlString);\n\n if (removedElements) {\n for (let i = 0; i < removedElements.length; i++) {\n const element = removedElements[i];\n if (element.__CE_state === CEState.custom) {\n internals.disconnectedCallback(element);\n }\n }\n }\n\n // Only create custom elements if this element's owner document is\n // associated with the registry.\n if (!this.ownerDocument.__CE_hasRegistry) {\n internals.patchTree(this);\n } else {\n internals.patchAndUpgradeTree(this);\n }\n return htmlString;\n },\n });\n }\n\n if (Native.Element_innerHTML && Native.Element_innerHTML.get) {\n patch_innerHTML(Element.prototype, Native.Element_innerHTML);\n } else if (Native.HTMLElement_innerHTML && Native.HTMLElement_innerHTML.get) {\n patch_innerHTML(HTMLElement.prototype, Native.HTMLElement_innerHTML);\n } else {\n\n internals.addPatch(function(element) {\n patch_innerHTML(element, {\n enumerable: true,\n configurable: true,\n // Implements getting `innerHTML` by performing an unpatched `cloneNode`\n // of the element and returning the resulting element's `innerHTML`.\n // TODO: Is this too expensive?\n get: /** @this {Element} */ function() {\n return Native.Node_cloneNode.call(this, true).innerHTML;\n },\n // Implements setting `innerHTML` by creating an unpatched element,\n // setting `innerHTML` of that element and replacing the target\n // element's children with those of the unpatched element.\n set: /** @this {Element} */ function(assignedValue) {\n // NOTE: re-route to `content` for `template` elements.\n // We need to do this because `template.appendChild` does not\n // route into `template.content`.\n const isTemplate = (this.localName === 'template');\n /** @type {!Node} */\n const content = isTemplate ? (/** @type {!HTMLTemplateElement} */\n (this)).content : this;\n /** @type {!Node} */\n const rawElement = Native.Document_createElement.call(document,\n this.localName);\n rawElement.innerHTML = assignedValue;\n\n while (content.childNodes.length > 0) {\n Native.Node_removeChild.call(content, content.childNodes[0]);\n }\n const container = isTemplate ? rawElement.content : rawElement;\n while (container.childNodes.length > 0) {\n Native.Node_appendChild.call(content, container.childNodes[0]);\n }\n },\n });\n });\n }\n\n\n Utilities.setPropertyUnchecked(Element.prototype, 'setAttribute',\n /**\n * @this {Element}\n * @param {string} name\n * @param {string} newValue\n */\n function(name, newValue) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_setAttribute.call(this, name, newValue);\n }\n\n const oldValue = Native.Element_getAttribute.call(this, name);\n Native.Element_setAttribute.call(this, name, newValue);\n newValue = Native.Element_getAttribute.call(this, name);\n internals.attributeChangedCallback(this, name, oldValue, newValue, null);\n });\n\n Utilities.setPropertyUnchecked(Element.prototype, 'setAttributeNS',\n /**\n * @this {Element}\n * @param {?string} namespace\n * @param {string} name\n * @param {string} newValue\n */\n function(namespace, name, newValue) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_setAttributeNS.call(this, namespace, name, newValue);\n }\n\n const oldValue = Native.Element_getAttributeNS.call(this, namespace, name);\n Native.Element_setAttributeNS.call(this, namespace, name, newValue);\n newValue = Native.Element_getAttributeNS.call(this, namespace, name);\n internals.attributeChangedCallback(this, name, oldValue, newValue, namespace);\n });\n\n Utilities.setPropertyUnchecked(Element.prototype, 'removeAttribute',\n /**\n * @this {Element}\n * @param {string} name\n */\n function(name) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_removeAttribute.call(this, name);\n }\n\n const oldValue = Native.Element_getAttribute.call(this, name);\n Native.Element_removeAttribute.call(this, name);\n if (oldValue !== null) {\n internals.attributeChangedCallback(this, name, oldValue, null, null);\n }\n });\n\n Utilities.setPropertyUnchecked(Element.prototype, 'removeAttributeNS',\n /**\n * @this {Element}\n * @param {?string} namespace\n * @param {string} name\n */\n function(namespace, name) {\n // Fast path for non-custom elements.\n if (this.__CE_state !== CEState.custom) {\n return Native.Element_removeAttributeNS.call(this, namespace, name);\n }\n\n const oldValue = Native.Element_getAttributeNS.call(this, namespace, name);\n Native.Element_removeAttributeNS.call(this, namespace, name);\n // In older browsers, `Element#getAttributeNS` may return the empty string\n // instead of null if the attribute does not exist. For details, see;\n // https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttributeNS#Notes\n const newValue = Native.Element_getAttributeNS.call(this, namespace, name);\n if (oldValue !== newValue) {\n internals.attributeChangedCallback(this, name, oldValue, newValue, namespace);\n }\n });\n\n\n function patch_insertAdjacentElement(destination, baseMethod) {\n Utilities.setPropertyUnchecked(destination, 'insertAdjacentElement',\n /**\n * @this {Element}\n * @param {string} where\n * @param {!Element} element\n * @return {?Element}\n */\n function(where, element) {\n const wasConnected = Utilities.isConnected(element);\n const insertedElement = /** @type {!Element} */\n (baseMethod.call(this, where, element));\n\n if (wasConnected) {\n internals.disconnectTree(element);\n }\n\n if (Utilities.isConnected(insertedElement)) {\n internals.connectTree(element);\n }\n return insertedElement;\n });\n }\n\n if (Native.HTMLElement_insertAdjacentElement) {\n patch_insertAdjacentElement(HTMLElement.prototype, Native.HTMLElement_insertAdjacentElement);\n } else if (Native.Element_insertAdjacentElement) {\n patch_insertAdjacentElement(Element.prototype, Native.Element_insertAdjacentElement);\n } else {\n console.warn('Custom Elements: `Element#insertAdjacentElement` was not patched.');\n }\n\n\n PatchParentNode(internals, Element.prototype, {\n prepend: Native.Element_prepend,\n append: Native.Element_append,\n });\n\n PatchChildNode(internals, Element.prototype, {\n before: Native.Element_before,\n after: Native.Element_after,\n replaceWith: Native.Element_replaceWith,\n remove: Native.Element_remove,\n });\n};\n","import CustomElementInternals from '../CustomElementInternals.js';\nimport Native from './Native.js';\nimport PatchParentNode from './Interface/ParentNode.js';\n\n/**\n * @param {!CustomElementInternals} internals\n */\nexport default function(internals) {\n PatchParentNode(internals, DocumentFragment.prototype, {\n prepend: Native.DocumentFragment_prepend,\n append: Native.DocumentFragment_append,\n });\n};\n"]} \ No newline at end of file diff --git a/static/native-shim.js b/static/native-shim.js new file mode 100755 index 0000000..2011d29 --- /dev/null +++ b/static/native-shim.js @@ -0,0 +1,164 @@ +/** + * @license + * Copyright (c) 2016 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 + */ + +/** + * This shim allows elements written in, or compiled to, ES5 to work on native + * implementations of Custom Elements. + * + * ES5-style classes don't work with native Custom Elements because the + * HTMLElement constructor uses the value of `new.target` to look up the custom + * element definition for the currently called constructor. `new.target` is only + * set when `new` is called and is only propagated via super() calls. super() + * is not emulatable in ES5. The pattern of `SuperClass.call(this)`` only works + * when extending other ES5-style classes, and does not propagate `new.target`. + * + * This shim allows the native HTMLElement constructor to work by generating and + * registering a stand-in class instead of the users custom element class. This + * stand-in class's constructor has an actual call to super(). + * `customElements.define()` and `customElements.get()` are both overridden to + * hide this stand-in class from users. + * + * In order to create instance of the user-defined class, rather than the stand + * in, the stand-in's constructor swizzles its instances prototype and invokes + * the user-defined constructor. When the user-defined constructor is called + * directly it creates an instance of the stand-in class to get a real extension + * of HTMLElement and returns that. + * + * There are two important constructors: A patched HTMLElement constructor, and + * the StandInElement constructor. They both will be called to create an element + * but which is called first depends on whether the browser creates the element + * or the user-defined constructor is called directly. The variables + * `browserConstruction` and `userConstruction` control the flow between the + * two constructors. + * + * This shim should be better than forcing the polyfill because: + * 1. It's smaller + * 2. All reaction timings are the same as native (mostly synchronous) + * 3. All reaction triggering DOM operations are automatically supported + * + * There are some restrictions and requirements on ES5 constructors: + * 1. All constructors in a inheritance hierarchy must be ES5-style, so that + * they can be called with Function.call(). This effectively means that the + * whole application must be compiled to ES5. + * 2. Constructors must return the value of the emulated super() call. Like + * `return SuperClass.call(this)` + * 3. The `this` reference should not be used before the emulated super() call + * just like `this` is illegal to use before super() in ES6. + * 4. Constructors should not create other custom elements before the emulated + * super() call. This is the same restriction as with native custom + * elements. + * + * Compiling valid class-based custom elements to ES5 will satisfy these + * requirements with the latest version of popular transpilers. + */ +(() => { + 'use strict'; + + // Do nothing if `customElements` does not exist. + if (!window.customElements) return; + + const NativeHTMLElement = window.HTMLElement; + const nativeDefine = window.customElements.define; + const nativeGet = window.customElements.get; + + /** + * Map of user-provided constructors to tag names. + * + * @type {Map} + */ + const tagnameByConstructor = new Map(); + + /** + * Map of tag names to user-provided constructors. + * + * @type {Map} + */ + const constructorByTagname = new Map(); + + + /** + * Whether the constructors are being called by a browser process, ie parsing + * or createElement. + */ + let browserConstruction = false; + + /** + * Whether the constructors are being called by a user-space process, ie + * calling an element constructor. + */ + let userConstruction = false; + + window.HTMLElement = function() { + if (!browserConstruction) { + const tagname = tagnameByConstructor.get(this.constructor); + const fakeClass = nativeGet.call(window.customElements, tagname); + + // Make sure that the fake constructor doesn't call back to this constructor + userConstruction = true; + const instance = new (fakeClass)(); + return instance; + } + // Else do nothing. This will be reached by ES5-style classes doing + // HTMLElement.call() during initialization + browserConstruction = false; + }; + // By setting the patched HTMLElement's prototype property to the native + // HTMLElement's prototype we make sure that: + // document.createElement('a') instanceof HTMLElement + // works because instanceof uses HTMLElement.prototype, which is on the + // ptototype chain of built-in elements. + window.HTMLElement.prototype = NativeHTMLElement.prototype; + + const define = (tagname, elementClass) => { + const elementProto = elementClass.prototype; + const StandInElement = class extends NativeHTMLElement { + constructor() { + // Call the native HTMLElement constructor, this gives us the + // under-construction instance as `this`: + super(); + + // The prototype will be wrong up because the browser used our fake + // class, so fix it: + Object.setPrototypeOf(this, elementProto); + + if (!userConstruction) { + // Make sure that user-defined constructor bottom's out to a do-nothing + // HTMLElement() call + browserConstruction = true; + // Call the user-defined constructor on our instance: + elementClass.call(this); + } + userConstruction = false; + } + }; + const standInProto = StandInElement.prototype; + StandInElement.observedAttributes = elementClass.observedAttributes; + standInProto.connectedCallback = elementProto.connectedCallback; + standInProto.disconnectedCallback = elementProto.disconnectedCallback; + standInProto.attributeChangedCallback = elementProto.attributeChangedCallback; + standInProto.adoptedCallback = elementProto.adoptedCallback; + + tagnameByConstructor.set(elementClass, tagname); + constructorByTagname.set(tagname, elementClass); + nativeDefine.call(window.customElements, tagname, StandInElement); + }; + + const get = (tagname) => constructorByTagname.get(tagname); + + // Workaround for Safari bug where patching customElements can be lost, likely + // due to native wrapper garbage collection issue + Object.defineProperty(window, 'customElements', + {value: window.customElements, configurable: true, writable: true}); + Object.defineProperty(window.customElements, 'define', + {value: define, configurable: true, writable: true}); + Object.defineProperty(window.customElements, 'get', + {value: get, configurable: true, writable: true}); + +})(); diff --git a/static/prettify.js b/static/prettify.js new file mode 100755 index 0000000..10c9fb7 --- /dev/null +++ b/static/prettify.js @@ -0,0 +1,1655 @@ +// Copyright (C) 2006 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + + +/** + * @fileoverview + * some functions for browser-side pretty printing of code contained in html. + * + *

+ * For a fairly comprehensive set of languages see the + * README + * file that came with this source. At a minimum, the lexer should work on a + * number of languages including C and friends, Java, Python, Bash, SQL, HTML, + * XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk + * and a subset of Perl, but, because of commenting conventions, doesn't work on + * Smalltalk, Lisp-like, or CAML-like languages without an explicit lang class. + *

+ * Usage:

    + *
  1. include this source file in an html page via + * {@code } + *
  2. define style rules. See the example page for examples. + *
  3. mark the {@code 
    } and {@code } tags in your source with
+ *    {@code class=prettyprint.}
+ *    You can also use the (html deprecated) {@code } tag, but the pretty
+ *    printer needs to do more substantial DOM manipulations to support that, so
+ *    some css styles may not be preserved.
+ * </ol>
+ * That's it.  I wanted to keep the API as simple as possible, so there's no
+ * need to specify which language the code is in, but if you wish, you can add
+ * another class to the {@code <pre>} or {@code <code>} element to specify the
+ * language, as in {@code <pre class="prettyprint lang-java">}.  Any class that
+ * starts with "lang-" followed by a file extension, specifies the file type.
+ * See the "lang-*.js" files in this directory for code that implements
+ * per-language file handlers.
+ * <p>
+ * Change log:<br>
+ * cbeust, 2006/08/22
+ * <blockquote>
+ *   Java annotations (start with "@") are now captured as literals ("lit")
+ * </blockquote>
+ * @requires console
+ */
+
+// JSLint declarations
+/*global console, document, navigator, setTimeout, window, define */
+
+/** @define {boolean} */
+var IN_GLOBAL_SCOPE = true;
+
+/**
+ * Split {@code prettyPrint} into multiple timeouts so as not to interfere with
+ * UI events.
+ * If set to {@code false}, {@code prettyPrint()} is synchronous.
+ */
+window['PR_SHOULD_USE_CONTINUATION'] = true;
+
+/**
+ * Pretty print a chunk of code.
+ * @param {string} sourceCodeHtml The HTML to pretty print.
+ * @param {string} opt_langExtension The language name to use.
+ *     Typically, a filename extension like 'cpp' or 'java'.
+ * @param {number|boolean} opt_numberLines True to number lines,
+ *     or the 1-indexed number of the first line in sourceCodeHtml.
+ * @return {string} code as html, but prettier
+ */
+var prettyPrintOne;
+/**
+ * Find all the {@code <pre>} and {@code <code>} tags in the DOM with
+ * {@code class=prettyprint} and prettify them.
+ *
+ * @param {Function} opt_whenDone called when prettifying is done.
+ * @param {HTMLElement|HTMLDocument} opt_root an element or document
+ *   containing all the elements to pretty print.
+ *   Defaults to {@code document.body}.
+ */
+var prettyPrint;
+
+
+(function () {
+  var win = window;
+  // Keyword lists for various languages.
+  // We use things that coerce to strings to make them compact when minified
+  // and to defeat aggressive optimizers that fold large string constants.
+  var FLOW_CONTROL_KEYWORDS = ["break,continue,do,else,for,if,return,while"];
+  var C_KEYWORDS = [FLOW_CONTROL_KEYWORDS,"auto,case,char,const,default," + 
+      "double,enum,extern,float,goto,inline,int,long,register,short,signed," +
+      "sizeof,static,struct,switch,typedef,union,unsigned,void,volatile"];
+  var COMMON_KEYWORDS = [C_KEYWORDS,"catch,class,delete,false,import," +
+      "new,operator,private,protected,public,this,throw,true,try,typeof"];
+  var CPP_KEYWORDS = [COMMON_KEYWORDS,"alignof,align_union,asm,axiom,bool," +
+      "concept,concept_map,const_cast,constexpr,decltype,delegate," +
+      "dynamic_cast,explicit,export,friend,generic,late_check," +
+      "mutable,namespace,nullptr,property,reinterpret_cast,static_assert," +
+      "static_cast,template,typeid,typename,using,virtual,where"];
+  var JAVA_KEYWORDS = [COMMON_KEYWORDS,
+      "abstract,assert,boolean,byte,extends,final,finally,implements,import," +
+      "instanceof,interface,null,native,package,strictfp,super,synchronized," +
+      "throws,transient"];
+  var CSHARP_KEYWORDS = [JAVA_KEYWORDS,
+      "as,base,by,checked,decimal,delegate,descending,dynamic,event," +
+      "fixed,foreach,from,group,implicit,in,internal,into,is,let," +
+      "lock,object,out,override,orderby,params,partial,readonly,ref,sbyte," +
+      "sealed,stackalloc,string,select,uint,ulong,unchecked,unsafe,ushort," +
+      "var,virtual,where"];
+  var COFFEE_KEYWORDS = "all,and,by,catch,class,else,extends,false,finally," +
+      "for,if,in,is,isnt,loop,new,no,not,null,of,off,on,or,return,super,then," +
+      "throw,true,try,unless,until,when,while,yes";
+  var JSCRIPT_KEYWORDS = [COMMON_KEYWORDS,
+      "debugger,eval,export,function,get,null,set,undefined,var,with," +
+      "Infinity,NaN"];
+  var PERL_KEYWORDS = "caller,delete,die,do,dump,elsif,eval,exit,foreach,for," +
+      "goto,if,import,last,local,my,next,no,our,print,package,redo,require," +
+      "sub,undef,unless,until,use,wantarray,while,BEGIN,END";
+  var PYTHON_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "and,as,assert,class,def,del," +
+      "elif,except,exec,finally,from,global,import,in,is,lambda," +
+      "nonlocal,not,or,pass,print,raise,try,with,yield," +
+      "False,True,None"];
+  var RUBY_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "alias,and,begin,case,class," +
+      "def,defined,elsif,end,ensure,false,in,module,next,nil,not,or,redo," +
+      "rescue,retry,self,super,then,true,undef,unless,until,when,yield," +
+      "BEGIN,END"];
+   var RUST_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "as,assert,const,copy,drop," +
+      "enum,extern,fail,false,fn,impl,let,log,loop,match,mod,move,mut,priv," +
+      "pub,pure,ref,self,static,struct,true,trait,type,unsafe,use"];
+  var SH_KEYWORDS = [FLOW_CONTROL_KEYWORDS, "case,done,elif,esac,eval,fi," +
+      "function,in,local,set,then,until"];
+  var ALL_KEYWORDS = [
+      CPP_KEYWORDS, CSHARP_KEYWORDS, JSCRIPT_KEYWORDS, PERL_KEYWORDS,
+      PYTHON_KEYWORDS, RUBY_KEYWORDS, SH_KEYWORDS];
+  var C_TYPES = /^(DIR|FILE|vector|(de|priority_)?queue|list|stack|(const_)?iterator|(multi)?(set|map)|bitset|u?(int|float)\d*)\b/;
+
+  // token style names.  correspond to css classes
+  /**
+   * token style for a string literal
+   * @const
+   */
+  var PR_STRING = 'str';
+  /**
+   * token style for a keyword
+   * @const
+   */
+  var PR_KEYWORD = 'kwd';
+  /**
+   * token style for a comment
+   * @const
+   */
+  var PR_COMMENT = 'com';
+  /**
+   * token style for a type
+   * @const
+   */
+  var PR_TYPE = 'typ';
+  /**
+   * token style for a literal value.  e.g. 1, null, true.
+   * @const
+   */
+  var PR_LITERAL = 'lit';
+  /**
+   * token style for a punctuation string.
+   * @const
+   */
+  var PR_PUNCTUATION = 'pun';
+  /**
+   * token style for plain text.
+   * @const
+   */
+  var PR_PLAIN = 'pln';
+
+  /**
+   * token style for an sgml tag.
+   * @const
+   */
+  var PR_TAG = 'tag';
+  /**
+   * token style for a markup declaration such as a DOCTYPE.
+   * @const
+   */
+  var PR_DECLARATION = 'dec';
+  /**
+   * token style for embedded source.
+   * @const
+   */
+  var PR_SOURCE = 'src';
+  /**
+   * token style for an sgml attribute name.
+   * @const
+   */
+  var PR_ATTRIB_NAME = 'atn';
+  /**
+   * token style for an sgml attribute value.
+   * @const
+   */
+  var PR_ATTRIB_VALUE = 'atv';
+
+  /**
+   * A class that indicates a section of markup that is not code, e.g. to allow
+   * embedding of line numbers within code listings.
+   * @const
+   */
+  var PR_NOCODE = 'nocode';
+
+  
+  
+  /**
+   * A set of tokens that can precede a regular expression literal in
+   * javascript
+   * http://web.archive.org/web/20070717142515/http://www.mozilla.org/js/language/js20/rationale/syntax.html
+   * has the full list, but I've removed ones that might be problematic when
+   * seen in languages that don't support regular expression literals.
+   *
+   * <p>Specifically, I've removed any keywords that can't precede a regexp
+   * literal in a syntactically legal javascript program, and I've removed the
+   * "in" keyword since it's not a keyword in many languages, and might be used
+   * as a count of inches.
+   *
+   * <p>The link above does not accurately describe EcmaScript rules since
+   * it fails to distinguish between (a=++/b/i) and (a++/b/i) but it works
+   * very well in practice.
+   *
+   * @private
+   * @const
+   */
+  var REGEXP_PRECEDER_PATTERN = '(?:^^\\.?|[+-]|[!=]=?=?|\\#|%=?|&&?=?|\\(|\\*=?|[+\\-]=|->|\\/=?|::?|<<?=?|>>?>?=?|,|;|\\?|@|\\[|~|{|\\^\\^?=?|\\|\\|?=?|break|case|continue|delete|do|else|finally|instanceof|return|throw|try|typeof)\\s*';
+  
+  // CAVEAT: this does not properly handle the case where a regular
+  // expression immediately follows another since a regular expression may
+  // have flags for case-sensitivity and the like.  Having regexp tokens
+  // adjacent is not valid in any language I'm aware of, so I'm punting.
+  // TODO: maybe style special characters inside a regexp as punctuation.
+
+  /**
+   * Given a group of {@link RegExp}s, returns a {@code RegExp} that globally
+   * matches the union of the sets of strings matched by the input RegExp.
+   * Since it matches globally, if the input strings have a start-of-input
+   * anchor (/^.../), it is ignored for the purposes of unioning.
+   * @param {Array.<RegExp>} regexs non multiline, non-global regexs.
+   * @return {RegExp} a global regex.
+   */
+  function combinePrefixPatterns(regexs) {
+    var capturedGroupIndex = 0;
+  
+    var needToFoldCase = false;
+    var ignoreCase = false;
+    for (var i = 0, n = regexs.length; i < n; ++i) {
+      var regex = regexs[i];
+      if (regex.ignoreCase) {
+        ignoreCase = true;
+      } else if (/[a-z]/i.test(regex.source.replace(
+                     /\\u[0-9a-f]{4}|\\x[0-9a-f]{2}|\\[^ux]/gi, ''))) {
+        needToFoldCase = true;
+        ignoreCase = false;
+        break;
+      }
+    }
+  
+    var escapeCharToCodeUnit = {
+      'b': 8,
+      't': 9,
+      'n': 0xa,
+      'v': 0xb,
+      'f': 0xc,
+      'r': 0xd
+    };
+  
+    function decodeEscape(charsetPart) {
+      var cc0 = charsetPart.charCodeAt(0);
+      if (cc0 !== 92 /* \\ */) {
+        return cc0;
+      }
+      var c1 = charsetPart.charAt(1);
+      cc0 = escapeCharToCodeUnit[c1];
+      if (cc0) {
+        return cc0;
+      } else if ('0' <= c1 && c1 <= '7') {
+        return parseInt(charsetPart.substring(1), 8);
+      } else if (c1 === 'u' || c1 === 'x') {
+        return parseInt(charsetPart.substring(2), 16);
+      } else {
+        return charsetPart.charCodeAt(1);
+      }
+    }
+  
+    function encodeEscape(charCode) {
+      if (charCode < 0x20) {
+        return (charCode < 0x10 ? '\\x0' : '\\x') + charCode.toString(16);
+      }
+      var ch = String.fromCharCode(charCode);
+      return (ch === '\\' || ch === '-' || ch === ']' || ch === '^')
+          ? "\\" + ch : ch;
+    }
+  
+    function caseFoldCharset(charSet) {
+      var charsetParts = charSet.substring(1, charSet.length - 1).match(
+          new RegExp(
+              '\\\\u[0-9A-Fa-f]{4}'
+              + '|\\\\x[0-9A-Fa-f]{2}'
+              + '|\\\\[0-3][0-7]{0,2}'
+              + '|\\\\[0-7]{1,2}'
+              + '|\\\\[\\s\\S]'
+              + '|-'
+              + '|[^-\\\\]',
+              'g'));
+      var ranges = [];
+      var inverse = charsetParts[0] === '^';
+  
+      var out = ['['];
+      if (inverse) { out.push('^'); }
+  
+      for (var i = inverse ? 1 : 0, n = charsetParts.length; i < n; ++i) {
+        var p = charsetParts[i];
+        if (/\\[bdsw]/i.test(p)) {  // Don't muck with named groups.
+          out.push(p);
+        } else {
+          var start = decodeEscape(p);
+          var end;
+          if (i + 2 < n && '-' === charsetParts[i + 1]) {
+            end = decodeEscape(charsetParts[i + 2]);
+            i += 2;
+          } else {
+            end = start;
+          }
+          ranges.push([start, end]);
+          // If the range might intersect letters, then expand it.
+          // This case handling is too simplistic.
+          // It does not deal with non-latin case folding.
+          // It works for latin source code identifiers though.
+          if (!(end < 65 || start > 122)) {
+            if (!(end < 65 || start > 90)) {
+              ranges.push([Math.max(65, start) | 32, Math.min(end, 90) | 32]);
+            }
+            if (!(end < 97 || start > 122)) {
+              ranges.push([Math.max(97, start) & ~32, Math.min(end, 122) & ~32]);
+            }
+          }
+        }
+      }
+  
+      // [[1, 10], [3, 4], [8, 12], [14, 14], [16, 16], [17, 17]]
+      // -> [[1, 12], [14, 14], [16, 17]]
+      ranges.sort(function (a, b) { return (a[0] - b[0]) || (b[1]  - a[1]); });
+      var consolidatedRanges = [];
+      var lastRange = [];
+      for (var i = 0; i < ranges.length; ++i) {
+        var range = ranges[i];
+        if (range[0] <= lastRange[1] + 1) {
+          lastRange[1] = Math.max(lastRange[1], range[1]);
+        } else {
+          consolidatedRanges.push(lastRange = range);
+        }
+      }
+  
+      for (var i = 0; i < consolidatedRanges.length; ++i) {
+        var range = consolidatedRanges[i];
+        out.push(encodeEscape(range[0]));
+        if (range[1] > range[0]) {
+          if (range[1] + 1 > range[0]) { out.push('-'); }
+          out.push(encodeEscape(range[1]));
+        }
+      }
+      out.push(']');
+      return out.join('');
+    }
+  
+    function allowAnywhereFoldCaseAndRenumberGroups(regex) {
+      // Split into character sets, escape sequences, punctuation strings
+      // like ('(', '(?:', ')', '^'), and runs of characters that do not
+      // include any of the above.
+      var parts = regex.source.match(
+          new RegExp(
+              '(?:'
+              + '\\[(?:[^\\x5C\\x5D]|\\\\[\\s\\S])*\\]'  // a character set
+              + '|\\\\u[A-Fa-f0-9]{4}'  // a unicode escape
+              + '|\\\\x[A-Fa-f0-9]{2}'  // a hex escape
+              + '|\\\\[0-9]+'  // a back-reference or octal escape
+              + '|\\\\[^ux0-9]'  // other escape sequence
+              + '|\\(\\?[:!=]'  // start of a non-capturing group
+              + '|[\\(\\)\\^]'  // start/end of a group, or line start
+              + '|[^\\x5B\\x5C\\(\\)\\^]+'  // run of other characters
+              + ')',
+              'g'));
+      var n = parts.length;
+  
+      // Maps captured group numbers to the number they will occupy in
+      // the output or to -1 if that has not been determined, or to
+      // undefined if they need not be capturing in the output.
+      var capturedGroups = [];
+  
+      // Walk over and identify back references to build the capturedGroups
+      // mapping.
+      for (var i = 0, groupIndex = 0; i < n; ++i) {
+        var p = parts[i];
+        if (p === '(') {
+          // groups are 1-indexed, so max group index is count of '('
+          ++groupIndex;
+        } else if ('\\' === p.charAt(0)) {
+          var decimalValue = +p.substring(1);
+          if (decimalValue) {
+            if (decimalValue <= groupIndex) {
+              capturedGroups[decimalValue] = -1;
+            } else {
+              // Replace with an unambiguous escape sequence so that
+              // an octal escape sequence does not turn into a backreference
+              // to a capturing group from an earlier regex.
+              parts[i] = encodeEscape(decimalValue);
+            }
+          }
+        }
+      }
+  
+      // Renumber groups and reduce capturing groups to non-capturing groups
+      // where possible.
+      for (var i = 1; i < capturedGroups.length; ++i) {
+        if (-1 === capturedGroups[i]) {
+          capturedGroups[i] = ++capturedGroupIndex;
+        }
+      }
+      for (var i = 0, groupIndex = 0; i < n; ++i) {
+        var p = parts[i];
+        if (p === '(') {
+          ++groupIndex;
+          if (!capturedGroups[groupIndex]) {
+            parts[i] = '(?:';
+          }
+        } else if ('\\' === p.charAt(0)) {
+          var decimalValue = +p.substring(1);
+          if (decimalValue && decimalValue <= groupIndex) {
+            parts[i] = '\\' + capturedGroups[decimalValue];
+          }
+        }
+      }
+  
+      // Remove any prefix anchors so that the output will match anywhere.
+      // ^^ really does mean an anchored match though.
+      for (var i = 0; i < n; ++i) {
+        if ('^' === parts[i] && '^' !== parts[i + 1]) { parts[i] = ''; }
+      }
+  
+      // Expand letters to groups to handle mixing of case-sensitive and
+      // case-insensitive patterns if necessary.
+      if (regex.ignoreCase && needToFoldCase) {
+        for (var i = 0; i < n; ++i) {
+          var p = parts[i];
+          var ch0 = p.charAt(0);
+          if (p.length >= 2 && ch0 === '[') {
+            parts[i] = caseFoldCharset(p);
+          } else if (ch0 !== '\\') {
+            // TODO: handle letters in numeric escapes.
+            parts[i] = p.replace(
+                /[a-zA-Z]/g,
+                function (ch) {
+                  var cc = ch.charCodeAt(0);
+                  return '[' + String.fromCharCode(cc & ~32, cc | 32) + ']';
+                });
+          }
+        }
+      }
+  
+      return parts.join('');
+    }
+  
+    var rewritten = [];
+    for (var i = 0, n = regexs.length; i < n; ++i) {
+      var regex = regexs[i];
+      if (regex.global || regex.multiline) { throw new Error('' + regex); }
+      rewritten.push(
+          '(?:' + allowAnywhereFoldCaseAndRenumberGroups(regex) + ')');
+    }
+  
+    return new RegExp(rewritten.join('|'), ignoreCase ? 'gi' : 'g');
+  }
+
+  /**
+   * Split markup into a string of source code and an array mapping ranges in
+   * that string to the text nodes in which they appear.
+   *
+   * <p>
+   * The HTML DOM structure:</p>
+   * <pre>
+   * (Element   "p"
+   *   (Element "b"
+   *     (Text  "print "))       ; #1
+   *   (Text    "'Hello '")      ; #2
+   *   (Element "br")            ; #3
+   *   (Text    "  + 'World';")) ; #4
+   * </pre>
+   * <p>
+   * corresponds to the HTML
+   * {@code <p><b>print </b>'Hello '<br>  + 'World';</p>}.</p>
+   *
+   * <p>
+   * It will produce the output:</p>
+   * <pre>
+   * {
+   *   sourceCode: "print 'Hello '\n  + 'World';",
+   *   //                     1          2
+   *   //           012345678901234 5678901234567
+   *   spans: [0, #1, 6, #2, 14, #3, 15, #4]
+   * }
+   * </pre>
+   * <p>
+   * where #1 is a reference to the {@code "print "} text node above, and so
+   * on for the other text nodes.
+   * </p>
+   *
+   * <p>
+   * The {@code} spans array is an array of pairs.  Even elements are the start
+   * indices of substrings, and odd elements are the text nodes (or BR elements)
+   * that contain the text for those substrings.
+   * Substrings continue until the next index or the end of the source.
+   * </p>
+   *
+   * @param {Node} node an HTML DOM subtree containing source-code.
+   * @param {boolean} isPreformatted true if white-space in text nodes should
+   *    be considered significant.
+   * @return {Object} source code and the text nodes in which they occur.
+   */
+  function extractSourceSpans(node, isPreformatted) {
+    var nocode = /(?:^|\s)nocode(?:\s|$)/;
+  
+    var chunks = [];
+    var length = 0;
+    var spans = [];
+    var k = 0;
+  
+    function walk(node) {
+      var type = node.nodeType;
+      if (type == 1) {  // Element
+        if (nocode.test(node.className)) { return; }
+        for (var child = node.firstChild; child; child = child.nextSibling) {
+          walk(child);
+        }
+        var nodeName = node.nodeName.toLowerCase();
+        if ('br' === nodeName || 'li' === nodeName) {
+          chunks[k] = '\n';
+          spans[k << 1] = length++;
+          spans[(k++ << 1) | 1] = node;
+        }
+      } else if (type == 3 || type == 4) {  // Text
+        var text = node.nodeValue;
+        if (text.length) {
+          if (!isPreformatted) {
+            text = text.replace(/[ \t\r\n]+/g, ' ');
+          } else {
+            text = text.replace(/\r\n?/g, '\n');  // Normalize newlines.
+          }
+          // TODO: handle tabs here?
+          chunks[k] = text;
+          spans[k << 1] = length;
+          length += text.length;
+          spans[(k++ << 1) | 1] = node;
+        }
+      }
+    }
+  
+    walk(node);
+  
+    return {
+      sourceCode: chunks.join('').replace(/\n$/, ''),
+      spans: spans
+    };
+  }
+
+  /**
+   * Apply the given language handler to sourceCode and add the resulting
+   * decorations to out.
+   * @param {number} basePos the index of sourceCode within the chunk of source
+   *    whose decorations are already present on out.
+   */
+  function appendDecorations(basePos, sourceCode, langHandler, out) {
+    if (!sourceCode) { return; }
+    var job = {
+      sourceCode: sourceCode,
+      basePos: basePos
+    };
+    langHandler(job);
+    out.push.apply(out, job.decorations);
+  }
+
+  var notWs = /\S/;
+
+  /**
+   * Given an element, if it contains only one child element and any text nodes
+   * it contains contain only space characters, return the sole child element.
+   * Otherwise returns undefined.
+   * <p>
+   * This is meant to return the CODE element in {@code <pre><code ...>} when
+   * there is a single child element that contains all the non-space textual
+   * content, but not to return anything where there are multiple child elements
+   * as in {@code <pre><code>...</code><code>...</code></pre>} or when there
+   * is textual content.
+   */
+  function childContentWrapper(element) {
+    var wrapper = undefined;
+    for (var c = element.firstChild; c; c = c.nextSibling) {
+      var type = c.nodeType;
+      wrapper = (type === 1)  // Element Node
+          ? (wrapper ? element : c)
+          : (type === 3)  // Text Node
+          ? (notWs.test(c.nodeValue) ? element : wrapper)
+          : wrapper;
+    }
+    return wrapper === element ? undefined : wrapper;
+  }
+
+  /** Given triples of [style, pattern, context] returns a lexing function,
+    * The lexing function interprets the patterns to find token boundaries and
+    * returns a decoration list of the form
+    * [index_0, style_0, index_1, style_1, ..., index_n, style_n]
+    * where index_n is an index into the sourceCode, and style_n is a style
+    * constant like PR_PLAIN.  index_n-1 <= index_n, and style_n-1 applies to
+    * all characters in sourceCode[index_n-1:index_n].
+    *
+    * The stylePatterns is a list whose elements have the form
+    * [style : string, pattern : RegExp, DEPRECATED, shortcut : string].
+    *
+    * Style is a style constant like PR_PLAIN, or can be a string of the
+    * form 'lang-FOO', where FOO is a language extension describing the
+    * language of the portion of the token in $1 after pattern executes.
+    * E.g., if style is 'lang-lisp', and group 1 contains the text
+    * '(hello (world))', then that portion of the token will be passed to the
+    * registered lisp handler for formatting.
+    * The text before and after group 1 will be restyled using this decorator
+    * so decorators should take care that this doesn't result in infinite
+    * recursion.  For example, the HTML lexer rule for SCRIPT elements looks
+    * something like ['lang-js', /<[s]cript>(.+?)<\/script>/].  This may match
+    * '<script>foo()<\/script>', which would cause the current decorator to
+    * be called with '<script>' which would not match the same rule since
+    * group 1 must not be empty, so it would be instead styled as PR_TAG by
+    * the generic tag rule.  The handler registered for the 'js' extension would
+    * then be called with 'foo()', and finally, the current decorator would
+    * be called with '<\/script>' which would not match the original rule and
+    * so the generic tag rule would identify it as a tag.
+    *
+    * Pattern must only match prefixes, and if it matches a prefix, then that
+    * match is considered a token with the same style.
+    *
+    * Context is applied to the last non-whitespace, non-comment token
+    * recognized.
+    *
+    * Shortcut is an optional string of characters, any of which, if the first
+    * character, gurantee that this pattern and only this pattern matches.
+    *
+    * @param {Array} shortcutStylePatterns patterns that always start with
+    *   a known character.  Must have a shortcut string.
+    * @param {Array} fallthroughStylePatterns patterns that will be tried in
+    *   order if the shortcut ones fail.  May have shortcuts.
+    *
+    * @return {function (Object)} a
+    *   function that takes source code and returns a list of decorations.
+    */
+  function createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns) {
+    var shortcuts = {};
+    var tokenizer;
+    (function () {
+      var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
+      var allRegexs = [];
+      var regexKeys = {};
+      for (var i = 0, n = allPatterns.length; i < n; ++i) {
+        var patternParts = allPatterns[i];
+        var shortcutChars = patternParts[3];
+        if (shortcutChars) {
+          for (var c = shortcutChars.length; --c >= 0;) {
+            shortcuts[shortcutChars.charAt(c)] = patternParts;
+          }
+        }
+        var regex = patternParts[1];
+        var k = '' + regex;
+        if (!regexKeys.hasOwnProperty(k)) {
+          allRegexs.push(regex);
+          regexKeys[k] = null;
+        }
+      }
+      allRegexs.push(/[\0-\uffff]/);
+      tokenizer = combinePrefixPatterns(allRegexs);
+    })();
+
+    var nPatterns = fallthroughStylePatterns.length;
+
+    /**
+     * Lexes job.sourceCode and produces an output array job.decorations of
+     * style classes preceded by the position at which they start in
+     * job.sourceCode in order.
+     *
+     * @param {Object} job an object like <pre>{
+     *    sourceCode: {string} sourceText plain text,
+     *    basePos: {int} position of job.sourceCode in the larger chunk of
+     *        sourceCode.
+     * }</pre>
+     */
+    var decorate = function (job) {
+      var sourceCode = job.sourceCode, basePos = job.basePos;
+      /** Even entries are positions in source in ascending order.  Odd enties
+        * are style markers (e.g., PR_COMMENT) that run from that position until
+        * the end.
+        * @type {Array.<number|string>}
+        */
+      var decorations = [basePos, PR_PLAIN];
+      var pos = 0;  // index into sourceCode
+      var tokens = sourceCode.match(tokenizer) || [];
+      var styleCache = {};
+
+      for (var ti = 0, nTokens = tokens.length; ti < nTokens; ++ti) {
+        var token = tokens[ti];
+        var style = styleCache[token];
+        var match = void 0;
+
+        var isEmbedded;
+        if (typeof style === 'string') {
+          isEmbedded = false;
+        } else {
+          var patternParts = shortcuts[token.charAt(0)];
+          if (patternParts) {
+            match = token.match(patternParts[1]);
+            style = patternParts[0];
+          } else {
+            for (var i = 0; i < nPatterns; ++i) {
+              patternParts = fallthroughStylePatterns[i];
+              match = token.match(patternParts[1]);
+              if (match) {
+                style = patternParts[0];
+                break;
+              }
+            }
+
+            if (!match) {  // make sure that we make progress
+              style = PR_PLAIN;
+            }
+          }
+
+          isEmbedded = style.length >= 5 && 'lang-' === style.substring(0, 5);
+          if (isEmbedded && !(match && typeof match[1] === 'string')) {
+            isEmbedded = false;
+            style = PR_SOURCE;
+          }
+
+          if (!isEmbedded) { styleCache[token] = style; }
+        }
+
+        var tokenStart = pos;
+        pos += token.length;
+
+        if (!isEmbedded) {
+          decorations.push(basePos + tokenStart, style);
+        } else {  // Treat group 1 as an embedded block of source code.
+          var embeddedSource = match[1];
+          var embeddedSourceStart = token.indexOf(embeddedSource);
+          var embeddedSourceEnd = embeddedSourceStart + embeddedSource.length;
+          if (match[2]) {
+            // If embeddedSource can be blank, then it would match at the
+            // beginning which would cause us to infinitely recurse on the
+            // entire token, so we catch the right context in match[2].
+            embeddedSourceEnd = token.length - match[2].length;
+            embeddedSourceStart = embeddedSourceEnd - embeddedSource.length;
+          }
+          var lang = style.substring(5);
+          // Decorate the left of the embedded source
+          appendDecorations(
+              basePos + tokenStart,
+              token.substring(0, embeddedSourceStart),
+              decorate, decorations);
+          // Decorate the embedded source
+          appendDecorations(
+              basePos + tokenStart + embeddedSourceStart,
+              embeddedSource,
+              langHandlerForExtension(lang, embeddedSource),
+              decorations);
+          // Decorate the right of the embedded section
+          appendDecorations(
+              basePos + tokenStart + embeddedSourceEnd,
+              token.substring(embeddedSourceEnd),
+              decorate, decorations);
+        }
+      }
+      job.decorations = decorations;
+    };
+    return decorate;
+  }
+
+  /** returns a function that produces a list of decorations from source text.
+    *
+    * This code treats ", ', and ` as string delimiters, and \ as a string
+    * escape.  It does not recognize perl's qq() style strings.
+    * It has no special handling for double delimiter escapes as in basic, or
+    * the tripled delimiters used in python, but should work on those regardless
+    * although in those cases a single string literal may be broken up into
+    * multiple adjacent string literals.
+    *
+    * It recognizes C, C++, and shell style comments.
+    *
+    * @param {Object} options a set of optional parameters.
+    * @return {function (Object)} a function that examines the source code
+    *     in the input job and builds the decoration list.
+    */
+  function sourceDecorator(options) {
+    var shortcutStylePatterns = [], fallthroughStylePatterns = [];
+    if (options['tripleQuotedStrings']) {
+      // '''multi-line-string''', 'single-line-string', and double-quoted
+      shortcutStylePatterns.push(
+          [PR_STRING,  /^(?:\'\'\'(?:[^\'\\]|\\[\s\S]|\'{1,2}(?=[^\']))*(?:\'\'\'|$)|\"\"\"(?:[^\"\\]|\\[\s\S]|\"{1,2}(?=[^\"]))*(?:\"\"\"|$)|\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$))/,
+           null, '\'"']);
+    } else if (options['multiLineStrings']) {
+      // 'multi-line-string', "multi-line-string"
+      shortcutStylePatterns.push(
+          [PR_STRING,  /^(?:\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$)|\`(?:[^\\\`]|\\[\s\S])*(?:\`|$))/,
+           null, '\'"`']);
+    } else {
+      // 'single-line-string', "single-line-string"
+      shortcutStylePatterns.push(
+          [PR_STRING,
+           /^(?:\'(?:[^\\\'\r\n]|\\.)*(?:\'|$)|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/,
+           null, '"\'']);
+    }
+    if (options['verbatimStrings']) {
+      // verbatim-string-literal production from the C# grammar.  See issue 93.
+      fallthroughStylePatterns.push(
+          [PR_STRING, /^@\"(?:[^\"]|\"\")*(?:\"|$)/, null]);
+    }
+    var hc = options['hashComments'];
+    if (hc) {
+      if (options['cStyleComments']) {
+        if (hc > 1) {  // multiline hash comments
+          shortcutStylePatterns.push(
+              [PR_COMMENT, /^#(?:##(?:[^#]|#(?!##))*(?:###|$)|.*)/, null, '#']);
+        } else {
+          // Stop C preprocessor declarations at an unclosed open comment
+          shortcutStylePatterns.push(
+              [PR_COMMENT, /^#(?:(?:define|e(?:l|nd)if|else|error|ifn?def|include|line|pragma|undef|warning)\b|[^\r\n]*)/,
+               null, '#']);
+        }
+        // #include <stdio.h>
+        fallthroughStylePatterns.push(
+            [PR_STRING,
+             /^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h(?:h|pp|\+\+)?|[a-z]\w*)>/,
+             null]);
+      } else {
+        shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']);
+      }
+    }
+    if (options['cStyleComments']) {
+      fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]);
+      fallthroughStylePatterns.push(
+          [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
+    }
+    var regexLiterals = options['regexLiterals'];
+    if (regexLiterals) {
+      /**
+       * @const
+       */
+      var regexExcls = regexLiterals > 1
+        ? ''  // Multiline regex literals
+        : '\n\r';
+      /**
+       * @const
+       */
+      var regexAny = regexExcls ? '.' : '[\\S\\s]';
+      /**
+       * @const
+       */
+      var REGEX_LITERAL = (
+          // A regular expression literal starts with a slash that is
+          // not followed by * or / so that it is not confused with
+          // comments.
+          '/(?=[^/*' + regexExcls + '])'
+          // and then contains any number of raw characters,
+          + '(?:[^/\\x5B\\x5C' + regexExcls + ']'
+          // escape sequences (\x5C),
+          +    '|\\x5C' + regexAny
+          // or non-nesting character sets (\x5B\x5D);
+          +    '|\\x5B(?:[^\\x5C\\x5D' + regexExcls + ']'
+          +             '|\\x5C' + regexAny + ')*(?:\\x5D|$))+'
+          // finally closed by a /.
+          + '/');
+      fallthroughStylePatterns.push(
+          ['lang-regex',
+           RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
+           ]);
+    }
+
+    var types = options['types'];
+    if (types) {
+      fallthroughStylePatterns.push([PR_TYPE, types]);
+    }
+
+    var keywords = ("" + options['keywords']).replace(/^ | $/g, '');
+    if (keywords.length) {
+      fallthroughStylePatterns.push(
+          [PR_KEYWORD,
+           new RegExp('^(?:' + keywords.replace(/[\s,]+/g, '|') + ')\\b'),
+           null]);
+    }
+
+    shortcutStylePatterns.push([PR_PLAIN,       /^\s+/, null, ' \r\n\t\xA0']);
+
+    var punctuation =
+      // The Bash man page says
+
+      // A word is a sequence of characters considered as a single
+      // unit by GRUB. Words are separated by metacharacters,
+      // which are the following plus space, tab, and newline: { }
+      // | & $ ; < >
+      // ...
+      
+      // A word beginning with # causes that word and all remaining
+      // characters on that line to be ignored.
+
+      // which means that only a '#' after /(?:^|[{}|&$;<>\s])/ starts a
+      // comment but empirically
+      // $ echo {#}
+      // {#}
+      // $ echo \$#
+      // $#
+      // $ echo }#
+      // }#
+
+      // so /(?:^|[|&;<>\s])/ is more appropriate.
+
+      // http://gcc.gnu.org/onlinedocs/gcc-2.95.3/cpp_1.html#SEC3
+      // suggests that this definition is compatible with a
+      // default mode that tries to use a single token definition
+      // to recognize both bash/python style comments and C
+      // preprocessor directives.
+
+      // This definition of punctuation does not include # in the list of
+      // follow-on exclusions, so # will not be broken before if preceeded
+      // by a punctuation character.  We could try to exclude # after
+      // [|&;<>] but that doesn't seem to cause many major problems.
+      // If that does turn out to be a problem, we should change the below
+      // when hc is truthy to include # in the run of punctuation characters
+      // only when not followint [|&;<>].
+      '^.[^\\s\\w.$@\'"`/\\\\]*';
+    if (options['regexLiterals']) {
+      punctuation += '(?!\s*\/)';
+    }
+
+    fallthroughStylePatterns.push(
+        // TODO(mikesamuel): recognize non-latin letters and numerals in idents
+        [PR_LITERAL,     /^@[a-z_$][a-z_$@0-9]*/i, null],
+        [PR_TYPE,        /^(?:[@_]?[A-Z]+[a-z][A-Za-z_$@0-9]*|\w+_t\b)/, null],
+        [PR_PLAIN,       /^[a-z_$][a-z_$@0-9]*/i, null],
+        [PR_LITERAL,
+         new RegExp(
+             '^(?:'
+             // A hex number
+             + '0x[a-f0-9]+'
+             // or an octal or decimal number,
+             + '|(?:\\d(?:_\\d+)*\\d*(?:\\.\\d*)?|\\.\\d\\+)'
+             // possibly in scientific notation
+             + '(?:e[+\\-]?\\d+)?'
+             + ')'
+             // with an optional modifier like UL for unsigned long
+             + '[a-z]*', 'i'),
+         null, '0123456789'],
+        // Don't treat escaped quotes in bash as starting strings.
+        // See issue 144.
+        [PR_PLAIN,       /^\\[\s\S]?/, null],
+        [PR_PUNCTUATION, new RegExp(punctuation), null]);
+
+    return createSimpleLexer(shortcutStylePatterns, fallthroughStylePatterns);
+  }
+
+  var decorateSource = sourceDecorator({
+        'keywords': ALL_KEYWORDS,
+        'hashComments': true,
+        'cStyleComments': true,
+        'multiLineStrings': true,
+        'regexLiterals': true
+      });
+
+  /**
+   * Given a DOM subtree, wraps it in a list, and puts each line into its own
+   * list item.
+   *
+   * @param {Node} node modified in place.  Its content is pulled into an
+   *     HTMLOListElement, and each line is moved into a separate list item.
+   *     This requires cloning elements, so the input might not have unique
+   *     IDs after numbering.
+   * @param {boolean} isPreformatted true iff white-space in text nodes should
+   *     be treated as significant.
+   */
+  function numberLines(node, opt_startLineNum, isPreformatted) {
+    var nocode = /(?:^|\s)nocode(?:\s|$)/;
+    var lineBreak = /\r\n?|\n/;
+  
+    var document = node.ownerDocument;
+  
+    var li = document.createElement('li');
+    while (node.firstChild) {
+      li.appendChild(node.firstChild);
+    }
+    // An array of lines.  We split below, so this is initialized to one
+    // un-split line.
+    var listItems = [li];
+  
+    function walk(node) {
+      var type = node.nodeType;
+      if (type == 1 && !nocode.test(node.className)) {  // Element
+        if ('br' === node.nodeName) {
+          breakAfter(node);
+          // Discard the <BR> since it is now flush against a </LI>.
+          if (node.parentNode) {
+            node.parentNode.removeChild(node);
+          }
+        } else {
+          for (var child = node.firstChild; child; child = child.nextSibling) {
+            walk(child);
+          }
+        }
+      } else if ((type == 3 || type == 4) && isPreformatted) {  // Text
+        var text = node.nodeValue;
+        var match = text.match(lineBreak);
+        if (match) {
+          var firstLine = text.substring(0, match.index);
+          node.nodeValue = firstLine;
+          var tail = text.substring(match.index + match[0].length);
+          if (tail) {
+            var parent = node.parentNode;
+            parent.insertBefore(
+              document.createTextNode(tail), node.nextSibling);
+          }
+          breakAfter(node);
+          if (!firstLine) {
+            // Don't leave blank text nodes in the DOM.
+            node.parentNode.removeChild(node);
+          }
+        }
+      }
+    }
+  
+    // Split a line after the given node.
+    function breakAfter(lineEndNode) {
+      // If there's nothing to the right, then we can skip ending the line
+      // here, and move root-wards since splitting just before an end-tag
+      // would require us to create a bunch of empty copies.
+      while (!lineEndNode.nextSibling) {
+        lineEndNode = lineEndNode.parentNode;
+        if (!lineEndNode) { return; }
+      }
+  
+      function breakLeftOf(limit, copy) {
+        // Clone shallowly if this node needs to be on both sides of the break.
+        var rightSide = copy ? limit.cloneNode(false) : limit;
+        var parent = limit.parentNode;
+        if (parent) {
+          // We clone the parent chain.
+          // This helps us resurrect important styling elements that cross lines.
+          // E.g. in <i>Foo<br>Bar</i>
+          // should be rewritten to <li><i>Foo</i></li><li><i>Bar</i></li>.
+          var parentClone = breakLeftOf(parent, 1);
+          // Move the clone and everything to the right of the original
+          // onto the cloned parent.
+          var next = limit.nextSibling;
+          parentClone.appendChild(rightSide);
+          for (var sibling = next; sibling; sibling = next) {
+            next = sibling.nextSibling;
+            parentClone.appendChild(sibling);
+          }
+        }
+        return rightSide;
+      }
+  
+      var copiedListItem = breakLeftOf(lineEndNode.nextSibling, 0);
+  
+      // Walk the parent chain until we reach an unattached LI.
+      for (var parent;
+           // Check nodeType since IE invents document fragments.
+           (parent = copiedListItem.parentNode) && parent.nodeType === 1;) {
+        copiedListItem = parent;
+      }
+      // Put it on the list of lines for later processing.
+      listItems.push(copiedListItem);
+    }
+  
+    // Split lines while there are lines left to split.
+    for (var i = 0;  // Number of lines that have been split so far.
+         i < listItems.length;  // length updated by breakAfter calls.
+         ++i) {
+      walk(listItems[i]);
+    }
+  
+    // Make sure numeric indices show correctly.
+    if (opt_startLineNum === (opt_startLineNum|0)) {
+      listItems[0].setAttribute('value', opt_startLineNum);
+    }
+  
+    var ol = document.createElement('ol');
+    ol.className = 'linenums';
+    var offset = Math.max(0, ((opt_startLineNum - 1 /* zero index */)) | 0) || 0;
+    for (var i = 0, n = listItems.length; i < n; ++i) {
+      li = listItems[i];
+      // Stick a class on the LIs so that stylesheets can
+      // color odd/even rows, or any other row pattern that
+      // is co-prime with 10.
+      li.className = 'L' + ((i + offset) % 10);
+      if (!li.firstChild) {
+        li.appendChild(document.createTextNode('\xA0'));
+      }
+      ol.appendChild(li);
+    }
+  
+    node.appendChild(ol);
+  }
+  /**
+   * Breaks {@code job.sourceCode} around style boundaries in
+   * {@code job.decorations} and modifies {@code job.sourceNode} in place.
+   * @param {Object} job like <pre>{
+   *    sourceCode: {string} source as plain text,
+   *    sourceNode: {HTMLElement} the element containing the source,
+   *    spans: {Array.<number|Node>} alternating span start indices into source
+   *       and the text node or element (e.g. {@code <BR>}) corresponding to that
+   *       span.
+   *    decorations: {Array.<number|string} an array of style classes preceded
+   *       by the position at which they start in job.sourceCode in order
+   * }</pre>
+   * @private
+   */
+  function recombineTagsAndDecorations(job) {
+    var isIE8OrEarlier = /\bMSIE\s(\d+)/.exec(navigator.userAgent);
+    isIE8OrEarlier = isIE8OrEarlier && +isIE8OrEarlier[1] <= 8;
+    var newlineRe = /\n/g;
+  
+    var source = job.sourceCode;
+    var sourceLength = source.length;
+    // Index into source after the last code-unit recombined.
+    var sourceIndex = 0;
+  
+    var spans = job.spans;
+    var nSpans = spans.length;
+    // Index into spans after the last span which ends at or before sourceIndex.
+    var spanIndex = 0;
+  
+    var decorations = job.decorations;
+    var nDecorations = decorations.length;
+    // Index into decorations after the last decoration which ends at or before
+    // sourceIndex.
+    var decorationIndex = 0;
+  
+    // Remove all zero-length decorations.
+    decorations[nDecorations] = sourceLength;
+    var decPos, i;
+    for (i = decPos = 0; i < nDecorations;) {
+      if (decorations[i] !== decorations[i + 2]) {
+        decorations[decPos++] = decorations[i++];
+        decorations[decPos++] = decorations[i++];
+      } else {
+        i += 2;
+      }
+    }
+    nDecorations = decPos;
+  
+    // Simplify decorations.
+    for (i = decPos = 0; i < nDecorations;) {
+      var startPos = decorations[i];
+      // Conflate all adjacent decorations that use the same style.
+      var startDec = decorations[i + 1];
+      var end = i + 2;
+      while (end + 2 <= nDecorations && decorations[end + 1] === startDec) {
+        end += 2;
+      }
+      decorations[decPos++] = startPos;
+      decorations[decPos++] = startDec;
+      i = end;
+    }
+  
+    nDecorations = decorations.length = decPos;
+  
+    var sourceNode = job.sourceNode;
+    var oldDisplay;
+    if (sourceNode) {
+      oldDisplay = sourceNode.style.display;
+      sourceNode.style.display = 'none';
+    }
+    try {
+      var decoration = null;
+      while (spanIndex < nSpans) {
+        var spanStart = spans[spanIndex];
+        var spanEnd = spans[spanIndex + 2] || sourceLength;
+  
+        var decEnd = decorations[decorationIndex + 2] || sourceLength;
+  
+        var end = Math.min(spanEnd, decEnd);
+  
+        var textNode = spans[spanIndex + 1];
+        var styledText;
+        if (textNode.nodeType !== 1  // Don't muck with <BR>s or <LI>s
+            // Don't introduce spans around empty text nodes.
+            && (styledText = source.substring(sourceIndex, end))) {
+          // This may seem bizarre, and it is.  Emitting LF on IE causes the
+          // code to display with spaces instead of line breaks.
+          // Emitting Windows standard issue linebreaks (CRLF) causes a blank
+          // space to appear at the beginning of every line but the first.
+          // Emitting an old Mac OS 9 line separator makes everything spiffy.
+          if (isIE8OrEarlier) {
+            styledText = styledText.replace(newlineRe, '\r');
+          }
+          textNode.nodeValue = styledText;
+          var document = textNode.ownerDocument;
+          var span = document.createElement('span');
+          span.className = decorations[decorationIndex + 1];
+          var parentNode = textNode.parentNode;
+          parentNode.replaceChild(span, textNode);
+          span.appendChild(textNode);
+          if (sourceIndex < spanEnd) {  // Split off a text node.
+            spans[spanIndex + 1] = textNode
+                // TODO: Possibly optimize by using '' if there's no flicker.
+                = document.createTextNode(source.substring(end, spanEnd));
+            parentNode.insertBefore(textNode, span.nextSibling);
+          }
+        }
+  
+        sourceIndex = end;
+  
+        if (sourceIndex >= spanEnd) {
+          spanIndex += 2;
+        }
+        if (sourceIndex >= decEnd) {
+          decorationIndex += 2;
+        }
+      }
+    } finally {
+      if (sourceNode) {
+        sourceNode.style.display = oldDisplay;
+      }
+    }
+  }
+
+  /** Maps language-specific file extensions to handlers. */
+  var langHandlerRegistry = {};
+  /** Register a language handler for the given file extensions.
+    * @param {function (Object)} handler a function from source code to a list
+    *      of decorations.  Takes a single argument job which describes the
+    *      state of the computation.   The single parameter has the form
+    *      {@code {
+    *        sourceCode: {string} as plain text.
+    *        decorations: {Array.<number|string>} an array of style classes
+    *                     preceded by the position at which they start in
+    *                     job.sourceCode in order.
+    *                     The language handler should assigned this field.
+    *        basePos: {int} the position of source in the larger source chunk.
+    *                 All positions in the output decorations array are relative
+    *                 to the larger source chunk.
+    *      } }
+    * @param {Array.<string>} fileExtensions
+    */
+  function registerLangHandler(handler, fileExtensions) {
+    for (var i = fileExtensions.length; --i >= 0;) {
+      var ext = fileExtensions[i];
+      if (!langHandlerRegistry.hasOwnProperty(ext)) {
+        langHandlerRegistry[ext] = handler;
+      } else if (win['console']) {
+        console['warn']('cannot override language handler %s', ext);
+      }
+    }
+  }
+  function langHandlerForExtension(extension, source) {
+    if (!(extension && langHandlerRegistry.hasOwnProperty(extension))) {
+      // Treat it as markup if the first non whitespace character is a < and
+      // the last non-whitespace character is a >.
+      extension = /^\s*</.test(source)
+          ? 'default-markup'
+          : 'default-code';
+    }
+    return langHandlerRegistry[extension];
+  }
+  registerLangHandler(decorateSource, ['default-code']);
+  registerLangHandler(
+      createSimpleLexer(
+          [],
+          [
+           [PR_PLAIN,       /^[^<?]+/],
+           [PR_DECLARATION, /^<!\w[^>]*(?:>|$)/],
+           [PR_COMMENT,     /^<\!--[\s\S]*?(?:-\->|$)/],
+           // Unescaped content in an unknown language
+           ['lang-',        /^<\?([\s\S]+?)(?:\?>|$)/],
+           ['lang-',        /^<%([\s\S]+?)(?:%>|$)/],
+           [PR_PUNCTUATION, /^(?:<[%?]|[%?]>)/],
+           ['lang-',        /^<xmp\b[^>]*>([\s\S]+?)<\/xmp\b[^>]*>/i],
+           // Unescaped content in javascript.  (Or possibly vbscript).
+           ['lang-js',      /^<script\b[^>]*>([\s\S]*?)(<\/script\b[^>]*>)/i],
+           // Contains unescaped stylesheet content
+           ['lang-css',     /^<style\b[^>]*>([\s\S]*?)(<\/style\b[^>]*>)/i],
+           ['lang-in.tag',  /^(<\/?[a-z][^<>]*>)/i]
+          ]),
+      ['default-markup', 'htm', 'html', 'mxml', 'xhtml', 'xml', 'xsl']);
+  registerLangHandler(
+      createSimpleLexer(
+          [
+           [PR_PLAIN,        /^[\s]+/, null, ' \t\r\n'],
+           [PR_ATTRIB_VALUE, /^(?:\"[^\"]*\"?|\'[^\']*\'?)/, null, '\"\'']
+           ],
+          [
+           [PR_TAG,          /^^<\/?[a-z](?:[\w.:-]*\w)?|\/?>$/i],
+           [PR_ATTRIB_NAME,  /^(?!style[\s=]|on)[a-z](?:[\w:-]*\w)?/i],
+           ['lang-uq.val',   /^=\s*([^>\'\"\s]*(?:[^>\'\"\s\/]|\/(?=\s)))/],
+           [PR_PUNCTUATION,  /^[=<>\/]+/],
+           ['lang-js',       /^on\w+\s*=\s*\"([^\"]+)\"/i],
+           ['lang-js',       /^on\w+\s*=\s*\'([^\']+)\'/i],
+           ['lang-js',       /^on\w+\s*=\s*([^\"\'>\s]+)/i],
+           ['lang-css',      /^style\s*=\s*\"([^\"]+)\"/i],
+           ['lang-css',      /^style\s*=\s*\'([^\']+)\'/i],
+           ['lang-css',      /^style\s*=\s*([^\"\'>\s]+)/i]
+           ]),
+      ['in.tag']);
+  registerLangHandler(
+      createSimpleLexer([], [[PR_ATTRIB_VALUE, /^[\s\S]+/]]), ['uq.val']);
+  registerLangHandler(sourceDecorator({
+          'keywords': CPP_KEYWORDS,
+          'hashComments': true,
+          'cStyleComments': true,
+          'types': C_TYPES
+        }), ['c', 'cc', 'cpp', 'cxx', 'cyc', 'm']);
+  registerLangHandler(sourceDecorator({
+          'keywords': 'null,true,false'
+        }), ['json']);
+  registerLangHandler(sourceDecorator({
+          'keywords': CSHARP_KEYWORDS,
+          'hashComments': true,
+          'cStyleComments': true,
+          'verbatimStrings': true,
+          'types': C_TYPES
+        }), ['cs']);
+  registerLangHandler(sourceDecorator({
+          'keywords': JAVA_KEYWORDS,
+          'cStyleComments': true
+        }), ['java']);
+  registerLangHandler(sourceDecorator({
+          'keywords': SH_KEYWORDS,
+          'hashComments': true,
+          'multiLineStrings': true
+        }), ['bash', 'bsh', 'csh', 'sh']);
+  registerLangHandler(sourceDecorator({
+          'keywords': PYTHON_KEYWORDS,
+          'hashComments': true,
+          'multiLineStrings': true,
+          'tripleQuotedStrings': true
+        }), ['cv', 'py', 'python']);
+  registerLangHandler(sourceDecorator({
+          'keywords': PERL_KEYWORDS,
+          'hashComments': true,
+          'multiLineStrings': true,
+          'regexLiterals': 2  // multiline regex literals
+        }), ['perl', 'pl', 'pm']);
+  registerLangHandler(sourceDecorator({
+          'keywords': RUBY_KEYWORDS,
+          'hashComments': true,
+          'multiLineStrings': true,
+          'regexLiterals': true
+        }), ['rb', 'ruby']);
+  registerLangHandler(sourceDecorator({
+          'keywords': JSCRIPT_KEYWORDS,
+          'cStyleComments': true,
+          'regexLiterals': true
+        }), ['javascript', 'js']);
+  registerLangHandler(sourceDecorator({
+          'keywords': COFFEE_KEYWORDS,
+          'hashComments': 3,  // ### style block comments
+          'cStyleComments': true,
+          'multilineStrings': true,
+          'tripleQuotedStrings': true,
+          'regexLiterals': true
+        }), ['coffee']);
+  registerLangHandler(sourceDecorator({
+          'keywords': RUST_KEYWORDS,
+          'cStyleComments': true,
+          'multilineStrings': true
+        }), ['rc', 'rs', 'rust']);
+  registerLangHandler(
+      createSimpleLexer([], [[PR_STRING, /^[\s\S]+/]]), ['regex']);
+
+  function applyDecorator(job) {
+    var opt_langExtension = job.langExtension;
+
+    try {
+      // Extract tags, and convert the source code to plain text.
+      var sourceAndSpans = extractSourceSpans(job.sourceNode, job.pre);
+      /** Plain text. @type {string} */
+      var source = sourceAndSpans.sourceCode;
+      job.sourceCode = source;
+      job.spans = sourceAndSpans.spans;
+      job.basePos = 0;
+
+      // Apply the appropriate language handler
+      langHandlerForExtension(opt_langExtension, source)(job);
+
+      // Integrate the decorations and tags back into the source code,
+      // modifying the sourceNode in place.
+      recombineTagsAndDecorations(job);
+    } catch (e) {
+      if (win['console']) {
+        console['log'](e && e['stack'] || e);
+      }
+    }
+  }
+
+  /**
+   * Pretty print a chunk of code.
+   * @param sourceCodeHtml {string} The HTML to pretty print.
+   * @param opt_langExtension {string} The language name to use.
+   *     Typically, a filename extension like 'cpp' or 'java'.
+   * @param opt_numberLines {number|boolean} True to number lines,
+   *     or the 1-indexed number of the first line in sourceCodeHtml.
+   */
+  function $prettyPrintOne(sourceCodeHtml, opt_langExtension, opt_numberLines) {
+    var container = document.createElement('div');
+    // This could cause images to load and onload listeners to fire.
+    // E.g. <img onerror="alert(1337)" src="nosuchimage.png">.
+    // We assume that the inner HTML is from a trusted source.
+    // The pre-tag is required for IE8 which strips newlines from innerHTML
+    // when it is injected into a <pre> tag.
+    // http://stackoverflow.com/questions/451486/pre-tag-loses-line-breaks-when-setting-innerhtml-in-ie
+    // http://stackoverflow.com/questions/195363/inserting-a-newline-into-a-pre-tag-ie-javascript
+    container.innerHTML = '<pre>' + sourceCodeHtml + '</pre>';
+    container = container.firstChild;
+    if (opt_numberLines) {
+      numberLines(container, opt_numberLines, true);
+    }
+
+    var job = {
+      langExtension: opt_langExtension,
+      numberLines: opt_numberLines,
+      sourceNode: container,
+      pre: 1
+    };
+    applyDecorator(job);
+    return container.innerHTML;
+  }
+
+   /**
+    * Find all the {@code <pre>} and {@code <code>} tags in the DOM with
+    * {@code class=prettyprint} and prettify them.
+    *
+    * @param {Function} opt_whenDone called when prettifying is done.
+    * @param {HTMLElement|HTMLDocument} opt_root an element or document
+    *   containing all the elements to pretty print.
+    *   Defaults to {@code document.body}.
+    */
+  function $prettyPrint(opt_whenDone, opt_root) {
+    var root = opt_root || document.body;
+    var doc = root.ownerDocument || document;
+    function byTagName(tn) { return root.getElementsByTagName(tn); }
+    // fetch a list of nodes to rewrite
+    var codeSegments = [byTagName('pre'), byTagName('code'), byTagName('xmp')];
+    var elements = [];
+    for (var i = 0; i < codeSegments.length; ++i) {
+      for (var j = 0, n = codeSegments[i].length; j < n; ++j) {
+        elements.push(codeSegments[i][j]);
+      }
+    }
+    codeSegments = null;
+
+    var clock = Date;
+    if (!clock['now']) {
+      clock = { 'now': function () { return +(new Date); } };
+    }
+
+    // The loop is broken into a series of continuations to make sure that we
+    // don't make the browser unresponsive when rewriting a large page.
+    var k = 0;
+    var prettyPrintingJob;
+
+    var langExtensionRe = /\blang(?:uage)?-([\w.]+)(?!\S)/;
+    var prettyPrintRe = /\bprettyprint\b/;
+    var prettyPrintedRe = /\bprettyprinted\b/;
+    var preformattedTagNameRe = /pre|xmp/i;
+    var codeRe = /^code$/i;
+    var preCodeXmpRe = /^(?:pre|code|xmp)$/i;
+    var EMPTY = {};
+
+    function doWork() {
+      var endTime = (win['PR_SHOULD_USE_CONTINUATION'] ?
+                     clock['now']() + 250 /* ms */ :
+                     Infinity);
+      for (; k < elements.length && clock['now']() < endTime; k++) {
+        var cs = elements[k];
+
+        // Look for a preceding comment like
+        // <?prettify lang="..." linenums="..."?>
+        var attrs = EMPTY;
+        {
+          for (var preceder = cs; (preceder = preceder.previousSibling);) {
+            var nt = preceder.nodeType;
+            // <?foo?> is parsed by HTML 5 to a comment node (8)
+            // like <!--?foo?-->, but in XML is a processing instruction
+            var value = (nt === 7 || nt === 8) && preceder.nodeValue;
+            if (value
+                ? !/^\??prettify\b/.test(value)
+                : (nt !== 3 || /\S/.test(preceder.nodeValue))) {
+              // Skip over white-space text nodes but not others.
+              break;
+            }
+            if (value) {
+              attrs = {};
+              value.replace(
+                  /\b(\w+)=([\w:.%+-]+)/g,
+                function (_, name, value) { attrs[name] = value; });
+              break;
+            }
+          }
+        }
+
+        var className = cs.className;
+        if ((attrs !== EMPTY || prettyPrintRe.test(className))
+            // Don't redo this if we've already done it.
+            // This allows recalling pretty print to just prettyprint elements
+            // that have been added to the page since last call.
+            && !prettyPrintedRe.test(className)) {
+
+          // make sure this is not nested in an already prettified element
+          var nested = false;
+          for (var p = cs.parentNode; p; p = p.parentNode) {
+            var tn = p.tagName;
+            if (preCodeXmpRe.test(tn)
+                && p.className && prettyPrintRe.test(p.className)) {
+              nested = true;
+              break;
+            }
+          }
+          if (!nested) {
+            // Mark done.  If we fail to prettyprint for whatever reason,
+            // we shouldn't try again.
+            cs.className += ' prettyprinted';
+
+            // If the classes includes a language extensions, use it.
+            // Language extensions can be specified like
+            //     <pre class="prettyprint lang-cpp">
+            // the language extension "cpp" is used to find a language handler
+            // as passed to PR.registerLangHandler.
+            // HTML5 recommends that a language be specified using "language-"
+            // as the prefix instead.  Google Code Prettify supports both.
+            // http://dev.w3.org/html5/spec-author-view/the-code-element.html
+            var langExtension = attrs['lang'];
+            if (!langExtension) {
+              langExtension = className.match(langExtensionRe);
+              // Support <pre class="prettyprint"><code class="language-c">
+              var wrapper;
+              if (!langExtension && (wrapper = childContentWrapper(cs))
+                  && codeRe.test(wrapper.tagName)) {
+                langExtension = wrapper.className.match(langExtensionRe);
+              }
+
+              if (langExtension) { langExtension = langExtension[1]; }
+            }
+
+            var preformatted;
+            if (preformattedTagNameRe.test(cs.tagName)) {
+              preformatted = 1;
+            } else {
+              var currentStyle = cs['currentStyle'];
+              var defaultView = doc.defaultView;
+              var whitespace = (
+                  currentStyle
+                  ? currentStyle['whiteSpace']
+                  : (defaultView
+                     && defaultView.getComputedStyle)
+                  ? defaultView.getComputedStyle(cs, null)
+                  .getPropertyValue('white-space')
+                  : 0);
+              preformatted = whitespace
+                  && 'pre' === whitespace.substring(0, 3);
+            }
+
+            // Look for a class like linenums or linenums:<n> where <n> is the
+            // 1-indexed number of the first line.
+            var lineNums = attrs['linenums'];
+            if (!(lineNums = lineNums === 'true' || +lineNums)) {
+              lineNums = className.match(/\blinenums\b(?::(\d+))?/);
+              lineNums =
+                lineNums
+                ? lineNums[1] && lineNums[1].length
+                  ? +lineNums[1] : true
+                : false;
+            }
+            if (lineNums) { numberLines(cs, lineNums, preformatted); }
+
+            // do the pretty printing
+            prettyPrintingJob = {
+              langExtension: langExtension,
+              sourceNode: cs,
+              numberLines: lineNums,
+              pre: preformatted
+            };
+            applyDecorator(prettyPrintingJob);
+          }
+        }
+      }
+      if (k < elements.length) {
+        // finish up in a continuation
+        setTimeout(doWork, 250);
+      } else if ('function' === typeof opt_whenDone) {
+        opt_whenDone();
+      }
+    }
+
+    doWork();
+  }
+
+  /**
+   * Contains functions for creating and registering new language handlers.
+   * @type {Object}
+   */
+  var PR = win['PR'] = {
+        'createSimpleLexer': createSimpleLexer,
+        'registerLangHandler': registerLangHandler,
+        'sourceDecorator': sourceDecorator,
+        'PR_ATTRIB_NAME': PR_ATTRIB_NAME,
+        'PR_ATTRIB_VALUE': PR_ATTRIB_VALUE,
+        'PR_COMMENT': PR_COMMENT,
+        'PR_DECLARATION': PR_DECLARATION,
+        'PR_KEYWORD': PR_KEYWORD,
+        'PR_LITERAL': PR_LITERAL,
+        'PR_NOCODE': PR_NOCODE,
+        'PR_PLAIN': PR_PLAIN,
+        'PR_PUNCTUATION': PR_PUNCTUATION,
+        'PR_SOURCE': PR_SOURCE,
+        'PR_STRING': PR_STRING,
+        'PR_TAG': PR_TAG,
+        'PR_TYPE': PR_TYPE,
+        'prettyPrintOne':
+           IN_GLOBAL_SCOPE
+             ? (win['prettyPrintOne'] = $prettyPrintOne)
+             : (prettyPrintOne = $prettyPrintOne),
+        'prettyPrint': prettyPrint =
+           IN_GLOBAL_SCOPE
+             ? (win['prettyPrint'] = $prettyPrint)
+             : (prettyPrint = $prettyPrint)
+      };
+
+  // Make PR available via the Asynchronous Module Definition (AMD) API.
+  // Per https://github.com/amdjs/amdjs-api/wiki/AMD:
+  // The Asynchronous Module Definition (AMD) API specifies a
+  // mechanism for defining modules such that the module and its
+  // dependencies can be asynchronously loaded.
+  // ...
+  // To allow a clear indicator that a global define function (as
+  // needed for script src browser loading) conforms to the AMD API,
+  // any global define function SHOULD have a property called "amd"
+  // whose value is an object. This helps avoid conflict with any
+  // other existing JavaScript code that could have defined a define()
+  // function that does not conform to the AMD API.
+  if (typeof define === "function" && define['amd']) {
+    define("google-code-prettify", [], function () {
+      return PR; 
+    });
+  }
+})();