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\n![](../../media/lively4_logo_smooth_200.png)\n\n# Lively4 core module\n\n[architecture](browse://doc/architecture/lively.md)\n\n #Lively4 #Singleton #KitchenSink #CyclicDependecies #RefactoringNeeded\n\n\nMD*/\n\nimport './patches.js'; // monkey patch the meta sytem....\n// import * as jquery from '../external/jquery.js'; // should not be needed any more!\nimport _ from 'src/external/lodash/lodash.js';\nimport * as scripts from './script-manager.js';\nimport * as messaging from './messaging.js';\nimport preferences from './preferences.js';\nimport persistence from './persistence.js';\nimport html from './html.js';\nimport * as reflection from './reflection.js';\nimport files from './files.js';\nimport paths from './paths.js';\nimport contextmenu from './contextmenu.js';\nimport keys from './keys.js';\nimport components from './morphic/component-loader.js';\nimport authGithub from './auth-github.js';\nimport authDropbox from './auth-dropbox.js';\nimport authGoogledrive from './auth-googledrive.js';\nimport expose from './expose.js';\nimport { toArray, uuid as generateUUID, wait } from 'utils';\nimport { pt, rect } from './graphics.js';\nimport Dialog from 'src/components/widgets/lively-dialog.js';\nimport ViewNav from 'src/client/viewnav.js';\nimport SystemjsWorker from \"src/worker/systemjs-worker.js\";\nimport Stack from 'src/client/utils/stack.js';\n\n/* expose external modules */\n// import color from '../external/tinycolor.js';\nimport focalStorage from '../external/focalStorage.js';\nimport Selection from 'src/components/halo/lively-selection.js';\nimport windows from \"src/components/widgets/lively-window.js\";\n\nimport events from \"src/client/morphic/events.js\";\n\nlet $ = window.$; // known global variables.\n\n\nvar debugLogHightlights = new WeakMap();\n\n// a) Special shorthands for interactive development\n// b) this is the only reasonable way to use modules in template scripts, due to no shared lexical scope #TODO\n// c) This indirection is also needed to let old events listeners signal to code in current modules\nvar exportmodules = [\"preferences\", \"files\", \"keys\", \"paths\", \"html\", \"reflection\", \"components\", \"persistence\",\n// \"color\",\n\"focalStorage\", \"authGithub\", \"authDropbox\", \"authGoogledrive\", \"contextmenu\", \"windows\"];\n\nclass LivelyNotification {\n  constructor(data) {\n    this.data = data;\n  }\n\n  displayOnConsole() {\n    console.log('%cLively Notification', \"color: gray; font-size: x-small\", this.data);\n  }\n}\n\n/*\n * The \"lively\" module is currently the kitchen-sink of this environment.\n *\n * #TODO refactor so that methods go into more specific modules.\n */\nexport default class Lively {\n\n  static get location() {\n    return window.location;\n  }\n\n  static set location(url) {\n    return window.location = url;\n  }\n\n  static findDirectDependentModules(path) {\n    var mod = System.normalizeSync(path);\n    return Object.values(System.loads).filter(ea => {\n      if (ea.key.match(\"unnamed_module\")) {\n\n        return false;\n      }\n\n      return ea.dependencies.find(dep => System.normalizeSync(dep, ea.key) == mod);\n    }).map(ea => ea.key);\n  }\n\n  static findDependedModules(path, recursive, all = []) {\n    let dependentModules = this.findDirectDependentModules(path);\n    if (recursive) {\n      dependentModules.forEach(module => {\n        if (!all.includes(module)) {\n          all.push(module);\n          this.findDependedModules(module, true, all);\n        }\n      });\n      return all;\n    } else {\n      return dependentModules;\n    }\n  }\n\n  static findDependedModulesGraph(path, all = []) {\n\n    let tree = {};\n    tree.name = path;\n    let dependentModules = this.findDirectDependentModules(path);\n    tree.children = [];\n\n    dependentModules.forEach(module => {\n      if (!all.includes(module)) {\n        all.push(module);\n        tree.children.push(this.findDependedModulesGraph(module, all));\n      } else {\n        tree.children.push({\n          name: module\n        });\n      }\n    });\n    return tree;\n  }\n\n  // #TODO remove code duplication lively-con\n  static async unloadModule(path) {\n    var normalizedPath = System.normalizeSync(path);\n    try {\n      // check, to prevent trying to reloading a module a second time if there was an error #375\n      if (System.get(normalizedPath)) {\n        await System.import(normalizedPath).then(module => {\n          if (module && typeof module.__unload__ === \"function\") {\n            module.__unload__();\n          }\n        });\n      }\n    } catch (e) {\n      console.log(\"WARNING: error while trying to unload \" + path);\n    }\n    System.registry.delete(normalizedPath);\n    // #Hack #issue in SystemJS babel syntax errors do not clear errors\n    System['@@registerRegistry'][normalizedPath] = undefined;\n    delete System.loads[normalizedPath];\n  }\n\n  static async reloadModule(path, force = false, forceRetranspile) {\n    // var start = performance.now()\n    // console.profile('reloadModule')\n\n    path = \"\" + path;\n    var changedModule = System.normalizeSync(path);\n    var load = System.loads[changedModule];\n    if (!load && !force) {\n      await this.unloadModule(path); // just to be sure...\n      console.warn(\"Don't reload non-loaded module\");\n      return;\n    }\n    if(forceRetranspile) {\n      System.forceRetranspilation = true;    \n    }\n    await this.unloadModule(path);\n    let mod = await System.import(path);\n    if(forceRetranspile) {\n      System.forceRetranspilation = false;    \n    }\n\n    /**\n     * Reload dependent modules\n     */\n    // #TODO how can we make the dependecy loading optional... I don't need the whole environment to relaod while developing a core module everybody depends on\n    // if (path.match(\"graphics.js\")) {\n    //   console.log(\"[reloadModule] don't load dependencies of \" + path)\n    //   return mod\n    // }\n\n    let dependedModules;\n    if (['__stats__.js', 'lively-code-mirror-modes.js'].some(ending => path.endsWith(ending))) {\n      // these files have a different mode of live programming:\n      // they update some global state/behavior to its latest version without requiring dependent modules to be reloaded\n      dependedModules = [];\n    } else if (path.match('client/reactive')) {\n      // For reactive, find modules recursive, but cut modules not in 'client/reactive' folder\n      dependedModules = lively.findDependedModules(path, true);\n      dependedModules = dependedModules.filter(mod => mod.match('client/reactive'));\n      // #TODO: duplicated code #refactor\n    } else if (path.match('client/vivide')) {\n      // For vivide, find modules recursive, but cut modules not in 'client/vivide' folder\n      dependedModules = lively.findDependedModules(path, true);\n      dependedModules = dependedModules.filter(mod => mod.match('client/vivide'));\n    } else {\n      // Find all modules that depend on me \n      // dependedModules = lively.findDependedModules(path); \n\n      // vs. find recursively all! \n      dependedModules = lively.findDependedModules(path, true);\n    }\n\n    // console.log(\"[reloadModule] reload yourself \",(performance.now() - start) + `ms` ) \n    // start = performance.now()\n\n    // and update them\n    for (let ea of dependedModules) {\n      try {\n        await this.unloadModule(ea);\n      } catch (e) {\n        lively.notify(\"[lively] Ignore Error unloadModule dependend module\", ea, e);\n      }\n    }\n\n    // start = performance.now()\n    // await Promise.all(dependedModules.map(dependentModule => System.import(dependentModule)));\n    for (let ea of dependedModules) {\n      try {\n        await System.import(ea);\n      } catch (e) {\n        lively.error(\"Error reloading dependend module\", ea);\n      }\n    }\n\n    // now check for dependent web components\n    for (let ea of dependedModules) {}\n    // System.import(ea);\n\n\n    // console.log(\"[reloadModule] updated depended modules \",(performance.now() - start) + `ms` ) \n    // start = performance.now()\n\n    /**\n     * Update Templates: Reload a template's .html file\n     */\n    for (let eaPath of [path].concat(dependedModules)) {\n      // console.log(\"update dependend: \", eaPath)\n      let found = lively.components.getTemplatePaths().find(templatePath => eaPath.match(templatePath));\n      if (found) {\n        /**\n         * Update a templates prototype\n         */\n        let moduleName = eaPath.replace(/[^/]*/, \"\");\n        let mod = await System.import(eaPath);\n        let defaultClass = mod.default;\n        if (defaultClass) {\n          console.log(\"update template prototype: \" + moduleName);\n          components.updatePrototype(defaultClass, moduleName);\n        }\n\n        let templateURL = eaPath.replace(/\\.js$/, \".html\");\n        try {\n          console.log(\"[templates] update template \" + templateURL);\n          setTimeout(() => {\n            lively.files.loadFile(templateURL).then(sourceCode => lively.updateTemplate(sourceCode, templateURL));\n          }, 100);\n        } catch (e) {\n          lively.notify(\"[templates] could not update template \" + templateURL, \"\" + e);\n        }\n      }\n    }\n\n    // console.log(\"[reloadModule] updated components \",(performance.now() - start) + `ms` ) \n    // console.profileEnd('reloadModule')\n\n    return mod;\n  }\n\n  static loadJavaScriptThroughDOM(name, src, force = false, type = \"text/javascript\") {\n    return new Promise(resolve => {\n      var scriptNode = document.querySelector(\"#\" + name);\n      if (!force && scriptNode) {\n        resolve // nothing to be done here\n        ();return;\n      }\n\n      if (scriptNode) {\n        scriptNode.remove();\n      }\n      var script = document.createElement(\"script\");\n      script.id = name;\n      script.charset = \"utf-8\";\n      script.type = type;\n      if (force) {\n        src = src + (\"?\" + Date.now());\n      }\n      script.src = src;\n      script.onload = function () {\n        resolve();\n      };\n      document.head.appendChild(script);\n    });\n  }\n\n  static loadCSSThroughDOM(name, href, force) {\n    return new Promise(resolve => {\n      var linkNode = document.querySelector(\"#\" + name);\n      if (linkNode) {\n        linkNode.remove();\n      }\n      var link = document.createElement(\"link\");\n      link.rel = \"stylesheet\";\n      link.id = name;\n      link.charset = \"utf-8\";\n      link.type = \"text/css\";\n      if (force) {\n        href += +\"?\" + Date.now();\n      }\n      link.href = href;\n      link.onload = function () {\n        resolve();\n      };\n      document.head.appendChild(link);\n    });\n  }\n  static async fillTemplateStyle(element, url) {\n    var url = lively.paths.normalizeURL(url);\n    return fetch(\"cached:\" + url).then(r => r.text()).then(css => {\n      // console.log(\"[lively] fill css \" + cssURL + \",\" + Math.round(css.length / 1000) + \"kb\" )\n      element.setAttribute(\"data-url\", url // so we find it again for updating... data-src is relative\n      );element.innerHTML = css;\n    });\n  }\n\n  static async fillTemplateStyles(root, debugInfo, baseURL = lively4url + '/') {\n    // there seems to be no <link ..> tag allowed to reference css inside of templates #Jens\n\n    // var start = performance.now()\n    var promises = [];\n    const lively4dir = lively4url + '/';\n    function normalize(cssURL) {\n      let url;\n      if (cssURL[0] === '/') {\n        url = new URL(cssURL.substring(1), lively4dir);\n      } else if (cssURL[0] === '.') {\n        url = new URL(cssURL, baseURL);\n      } else {\n        url = new URL(cssURL);\n      }\n\n      if (!url) {\n        return '';\n      }\n      return url.toString();\n    }\n\n    root.querySelectorAll(\"style\").forEach(ea => {\n      const cssURL = ea.getAttribute(\"data-src\");\n      if (cssURL) {\n        const normalizedURL = normalize(cssURL);\n        promises.push(this.fillTemplateStyle(ea, normalizedURL));\n      }\n    });\n    await Promise.all(promises\n    // console.log(\"load fillTemplateStyles \"  + (performance.now() - start) +\"ms :\"+ debugInfo);\n    );\n  }\n\n  static showError(error) {\n    this.handleError(error);\n  }\n\n  static async handleError(error) {\n    lively.LastError = error;\n    try {\n      if (!error) return; // hmm... this is currious...\n      if (error.message.match(\"Maximum call stack size exceeded\")) {\n        console.log(error);\n        return;\n      }\n      if (document.querySelector(\"lively-console\")) {\n        console.log(error);\n      } else {\n        console.error('[error] ', error, error.stack);\n        if (!window.__karma__) {\n          await lively.notify(\"Error: \", error, 10, () => {\n            this.showErrorWindow(error);\n          }, \"red\");\n        }\n      }\n    } catch (e) {\n      console.log(\"An error happend while handling and error: \" + e);\n    }\n  }\n  \n  static showErrorWindow(error) {\n    lively.openComponentInWindow(\"lively-error\").then(comp => {\n      comp.stack = error.stack;\n      comp.parentElement.setAttribute(\"title\", \"\" + error.message);\n      comp.style.height = \"max-content\";\n      var bounds = comp.getBoundingClientRect();\n      comp.parentElement.style.height = bounds.height + 20 + \"px\";\n      comp.parentElement.style.width = bounds.width + \"px\";\n    });\n  }\n\n  static async loaded() {\n    // #Refactor with #ContextJS\n    // guard againsst wrapping twice and ending in endless recursion\n    // if (!console.log.originalFunction) {\n    //     var nativeLog = console.log;\n    //     console.log = function() {\n    //         nativeLog.apply(console, arguments);\n    //         console.log.apply(undefined, arguments);\n    //     };\n    //     console.log.originalFunction = nativeLog; // #TODO use generic Wrapper mechanism here\n    // }\n    // if (!console.error.originalFunction) {\n    //     var nativeError = console.error;\n    //     console.error = function() {\n    //         nativeError.apply(console, arguments);\n    //         console.log.apply(undefined, arguments);\n    //     };\n    //     console.error.originalFunction = nativeError; // #TODO use generic Wrapper mechanism here\n    // }\n\n    // General Error Handling\n    if (window.onerror === null) {\n      window.onerror = function (message, source, lineno, colno, error) {\n        lively.handleError(error);\n      };\n    }\n    // do it just once\n    if (!window.unhandledRejectionEventLister) {\n      window.unhandledRejectionEventLister = function (evt) {\n        lively.handleError(evt.reason);\n      };\n      window.addEventListener('unhandledrejection', unhandledRejectionEventLister);\n    }\n\n    await this.exportModules();\n\n    if (!window.lively4chrome) {\n      // for container content... But this will lead to conflicts with lively4chrome  ?? #Jens\n      lively.loadCSSThroughDOM(\"livelystyle\", lively4url + \"/templates/lively4.css\");\n    }\n    // preload some components\n    // #FixMe does not work this way, because this might conflict with the normal loading ....\n    // await components.loadByName(\"lively-window\");\n    // await components.loadByName(\"lively-editor\");\n    // await components.loadByName(\"lively-script\");\n\n    setTimeout(() => {\n      // wait for the timeout and try again\n      document.body.querySelectorAll(\"img\").forEach(ea => ea.src = \"\" + ea.src // #Hack #swx RPC messages...\n      );\n    }, 12 * 1000);\n  }\n\n  static async exportModules() {\n    exportmodules.forEach(name => lively[name] = eval(name)); // oh... this seems uglier than expectednit\n\n    await System.import(\"src/client/clipboard.js\").then(m => {\n      lively.clipboard = m.default;\n    } // depends on me\n    );await System.import(\"src/client/graffle.js\" // depends on me\n    );await System.import(\"src/client/draganddrop.js\" // depends on me\n\n\n    );await System.import(\"src/client/poid.js\" // depends on me\n    // #TODO should we load fetch protocols lazy?\n    );await System.import(\"demos/plex/plex-scheme.js\" // depends on me\n    );await System.import(\"src/client/protocols/todoist.js\");\n    await System.import(\"src/client/protocols/wikipedia.js\");\n    await System.import(\"src/client/protocols/tmp.js\");\n    await System.import(\"src/client/protocols/bib.js\");\n    await System.import(\"src/client/protocols/author.js\");\n    await System.import(\"src/client/protocols/keyword.js\");\n    await System.import(\"src/client/protocols/academic.js\");\n\n    await System.import(\"src/client/protocols/microsoft.js\");\n\n    await System.import(\"src/client/files-caches.js\" // depends on me\n    );\n  }\n\n  // #Deprecated who does/dir use this code and what for\n  static asUL(anyList) {\n    var ul = document.createElement(\"ul\");\n    ul.style.minWidth = \"50px\";\n    ul.style.minHeight = \"50px\";\n    ul.style.backgroundColor = \"gray\";\n    anyList.forEach(ea => {\n      var item = document.createElement(\"li\");\n      item.textContent = ea;\n      item.value = ea;\n      ul.appendChild(item);\n    });\n    return ul;\n  }\n\n  static openWorkspace(string, pos, worldContext) {\n    string = string || \"\";\n    var name = \"lively-code-mirror\";\n    return lively.openComponentInWindow(name, null, pt(700, 400), worldContext).then(comp => {\n      comp.mode = \"text/jsx\";\n      comp.value = string;\n      comp.setAttribute(\"overscroll\", \"contain\");\n      comp.style.height = \"100%\";\n      var container = comp.parentElement;\n      if (pos) lively.setGlobalPosition(container, pos);\n      container.setAttribute(\"title\", \"Workspace\");\n      comp.focus();\n      return comp;\n    });\n  }\n\n  static openInspector(object, pos, str, worldContext) {\n    return lively.openComponentInWindow(\"lively-inspector\", pos, pt(400, 500), worldContext).then(inspector => {\n      inspector.windowTitle = \"Inspect: \" + str;\n      inspector.inspect(object);\n      return inspector;\n    });\n  }\n\n  static ensureSpawnArea() {\n    var spawnId = \"livelySpawnArea\";\n    var spawn = document.body.querySelector(\"#\" + spawnId);\n    if (!spawn) {\n      spawn = document.createElement(\"div\");\n      spawn.id = spawnId;\n      spawn.style.display = \"none\";\n      spawn.isMetaNode = true;\n      document.body.appendChild(spawn);\n    }\n    return spawn;\n  }\n\n  static async create(name = \"lively-table\", parent = this.ensureSpawnArea()) {\n\n    // =this.ensureSpawnArea()\n\n    var element = document.createElement(name\n    // #TODO normal elements will not resolve this promoise #BUG\n    );if (name.match(\"-\")) {\n      await lively.components.openIn(parent, element);\n    } else {\n      parent.appendChild(element);\n    }\n    // if (document.activeElement) {\n    //   var pos = lively.getGlobalBounds(document.activeElement).bottomLeft()\n    //   lively.setGlobalPosition(element, pos)\n    // }\n    return element;\n  }\n\n  static pt(x, y) {\n    return pt(x, y);\n  }\n  \n  static rect(...args) {\n    return rect(...args);\n  }\n\n  // #important\n  static setPosition(obj, point, mode, animateDuration) {\n    if (obj instanceof SVGElement && !(obj instanceof SVGSVGElement)) {\n      if (obj.transform && obj.transform.baseVal) {\n        // get the position of an svg element\n        var t = obj.transform.baseVal.consolidate();\n        if (t) {\n          t.setTranslate(point.x, point.y);\n        } else {\n          obj.setAttribute(\"transform\", `translate(${point.x}, ${point.y})`);\n        }\n      } else {\n        throw new Error(\"path has no transformation\");\n      }\n    } else {\n      var old = lively.getPosition(obj\n      // normal DOM Element\n      );obj.style.position = mode || \"absolute\";\n      obj.style.left = \"\" + point.x + \"px\";\n      obj.style.top = \"\" + point.y + \"px\";\n      obj.dispatchEvent(new CustomEvent(\"position-changed\"));\n\n      if (animateDuration) {\n        obj.animate([{ left: old.x + \"px\", top: old.y + \"px\" }, { left: point.x + \"px\", top: point.y + \"px\" }], {\n          duration: animateDuration\n        });\n      }\n    }\n  }\n\n  // Example: lively.getPosition(that)\n\n  // #important\n  static getPosition(obj) {\n\n    var pos;\n    if (obj instanceof SVGElement && !(obj instanceof SVGSVGElement)) {\n      if (obj.transform && obj.transform.baseVal) {\n        // get the position of an svg element\n        var t = obj.transform.baseVal.consolidate();\n        if (!t) return pt(0, 0);\n        var m = t.matrix;\n        var p = new DOMPoint(0, 0);\n        var r = p.matrixTransform(m);\n        if (!r || !r.x) return pt(0, 0);\n        return pt(r.x / r.w, r.y / r.w);\n      } else {\n        throw new Error(\"path has no transformation\");\n      }\n    }\n\n    if (obj.clientX !== undefined) {\n      return pt(obj.clientX, obj.clientY);\n    }\n\n    // try to use directly the style object... \n    if (obj.style) {\n      pos = pt(parseFloat(obj.style.left), parseFloat(obj.style.top));\n    }\n    // keyboard events don't have a position.\n    // take the position of the target element.\n    if (obj instanceof KeyboardEvent) {\n      return lively.getGlobalPosition(obj.target);\n    }\n    // #Fallback .... and compute the style\n    if (isNaN(pos.x) || isNaN(pos.y)) {\n      var style = getComputedStyle(obj);\n      pos = pt(parseFloat(style.left), parseFloat(style.top));\n    }\n    return pos;\n  }\n\n  static getExtent(node) {\n    if (node === window) {\n      return pt(window.innerWidth, window.innerHeight);\n    }\n    // using the getBoundingClientRect produces the wrong extent\n    var style = getComputedStyle(node);\n    if (!style) {\n      return pt(0, 0);\n    }\n    return pt(parseFloat(style.width), parseFloat(style.height));\n  }\n\n  static setExtent(node, extent) {\n    // node.style.width = '' + extent.x + 'px';\n    // node.style.height = '' + extent.y + 'px';\n    // node.dispatchEvent(new CustomEvent(\"extent-changed\"))\n    this.setWidth(node, extent.x, true);\n    this.setHeight(node, extent.y);\n  }\n\n  static setWidth(node, x, noevent) {\n    node.style.width = '' + x + 'px';\n    if (!noevent) node.dispatchEvent(new CustomEvent(\"extent-changed\"));\n  }\n\n  static setHeight(node, y, noevent) {\n    node.style.height = '' + y + 'px';\n    if (!noevent) node.dispatchEvent(new CustomEvent(\"extent-changed\"));\n  }\n\n  static getGlobalPosition(node) {\n    // WARNING: this method works pretty well but does not consider any CSS transformation\n    if (!node.getBoundingClientRect) {\n      return pt(0, 0);\n    }\n    var bounds = node.getBoundingClientRect();\n    return pt(bounds.left, bounds.top);\n  }\n\n  static setGlobalPosition(node, pos) {\n    // if (!node.parentElement) return\n    // var parentPos = this.getGlobalPosition(node.parentElement)\n    // this.setPosition(node, pos.subPt(parentPos))\n\n    // With all the parent elements, shadow roots and so on it is difficult to set a global position\n    // ususally, we would get the global position of a parent element, but this is not always correct\n    // so we use our own global position...\n    lively.setPosition(node, pt(0, 0) // #somehow one time is not enough...\n    );var delta = pos.subPt(lively.getGlobalPosition(node));\n    lively.moveBy(node, delta);\n  }\n\n  static getGlobalCenter(node) {\n    return this.getGlobalPosition(node).addPt(this.getExtent(node).scaleBy(0.5));\n  }\n\n  static setGlobalCenter(node, pos) {\n    this.setGlobalPosition(node, pos.subPt(this.getExtent(node).scaleBy(0.5)));\n  }\n\n  /**\n   * vertical\n   * t - top\n   * m - middle\n   * b - bottom\n   * horizontal\n   * l - left\n   * c - center\n   * r - right\n   */\n  static _getScalingFromDescription(where) {\n    if (where.length !== 2) {\n      throw new Error(`anchor description should be 2 characters long, but was ${where}`)\n    }\n    const [vertical, horizontal] = where\n    // if (!['t', 'm', 'b'])\n    const vScale = {\n      t: 0, m: 0.5, b: 1\n    }[vertical]\n    const hScale = {\n      l: 0, c: 0.5, r: 1\n    }[horizontal]\n    if (vScale === undefined) {\n      throw new Error(`vertical anchor should be one of 't', 'm', 'b', but was '${where}'`)\n    }\n    if (hScale === undefined) {\n      throw new Error(`vertical anchor should be one of 'l', 'c', 'r', but was '${where}'`)\n    }\n    return pt(hScale, vScale);\n  }\n\n  static getGlobalPositionAt(node, where = 'tl') {\n    return this.getGlobalPosition(node).addPt(this.getExtent(node).scaleByPt(this._getScalingFromDescription(where)));\n  }\n\n  static setGlobalPositionAt(node, pos, where = 'tl') {\n    this.setGlobalPosition(node, pos.subPt(this.getExtent(node).scaleByPt(this._getScalingFromDescription(where))));\n  }\n\n  static moveBy(node, delta, animateDuration) {\n    this.setPosition(node, this.getPosition(node).addPt(delta), undefined, animateDuration);\n  }\n\n  static getBounds(node) {\n    var pos = lively.getPosition(node);\n    var extent = lively.getExtent(node);\n    return rect(pos, pos.addPt(extent));\n  }\n\n  static setBounds(node, bounds) {\n    lively.setPosition(node, bounds.topLeft());\n    lively.setExtent(node, bounds.extent());\n  }\n\n  static getGlobalBounds(node) {\n    var bounds = node.getBoundingClientRect();\n    if (!bounds) {\n      return rect(0, 0, 0, 0);\n    }\n    return rect(bounds.left, bounds.top, bounds.width, bounds.height);\n  }\n\n  // compute the global bounds of an element and all absolute positioned elements\n  static getTotalGlobalBounds(element) {\n\n    var all = Array.from(element.querySelectorAll(\"*\")).filter(ea => ea.style.position == \"absolute\" || ea.style.position == \"relative\").concat([element]).map(ea => lively.getGlobalBounds(ea));\n    var max;\n    var min;\n    all.forEach(ea => {\n      var topLeft = ea.topLeft();\n      var bottomRight = ea.bottomRight\n      // console.log(\"ea \" + topLeft + \" \" + bottomRight)\n      ();min = topLeft.minPt(min || topLeft);\n      max = bottomRight.maxPt(max || bottomRight);\n    }\n    // console.log(\"min \" + min + \" max \" + max)\n    );return rect(min, max);\n  }\n\n  static getScroll() {\n    return pt(document.scrollingElement.scrollLeft || 0, document.scrollingElement.scrollTop || 0);\n  }\n\n  // #Depricated\n  static openFile(url) {\n    if (url.hostname == \"lively4\") {\n      var container = document.querySelector('lively-container');\n      if (container) {\n        container.followPath(url.pathname);\n      } else {\n        console.log(\"fall back on editor: \" + url);\n        this.editFile(url);\n      }\n    } else {\n      this.editFile(url);\n    }\n  }\n\n  static editFile(url) {\n    var editor = document.createElement(\"lively-editor\");\n    components.openInWindow(editor).then(container => {\n      lively.setPosition(container, lively.pt(100, 100));\n      editor.setURL(url);\n      editor.loadFile();\n    });\n  }\n\n  static hideContextMenu(evt) {\n    if (evt.composedPath()[0] !== document.body) return;\n    console.log(\"hide context menu:\" + evt);\n    contextmenu.hide();\n  }\n\n  static openContextMenu(container, evt, target, worldContext) {\n    if (window.HaloService && (HaloService.areHalosActive() || HaloService.halosHidden && Date.now() - HaloService.halosHidden < 500)) {\n      target = that;\n    }\n    lively.contextmenu.openIn(container, evt, target, worldContext);\n  }\n\n  static nativeNotify(title, text, timeout, cb) {\n    if (!this.notifications) this.notifications = [];\n    this.notifications.push({ title: title, text: text, cb: cb, time: Date.now() });\n\n    if (Notification.permission !== \"granted\") Notification.requestPermission();\n\n    var time = Date.now();\n\n    // check if the third last notification was already one second ago\n    if (this.notifications.length > 5 && Date.now() - this.notifications[this.notifications.length - 3].time < 1000) {\n      return console.log(\"SILENT NOTE: \" + title + \" (\" + text + \")\");\n    }\n\n    console.log(\"NOTE: \" + title + \" (\" + text + \")\");\n\n    var notification = new Notification(title || \"\", {\n      icon: 'https://www.lively-kernel.org/media/livelylogo-small.png',\n      body: text || \"\"\n    });\n    if (cb) notification.onclick = cb;\n    if (timeout === undefined) timeout = 3;\n    setTimeout(() => notification.close(), timeout * 1000);\n    // notification.onclick = cb\n  }\n\n  /** notify **\n   *\n   * - displays an notification in the lower left of screen\n   * - takes arguments also as object parameter\n   *\n   * EXAMPLE:\n   *\n      lively.notify({\n      \ttitle: \"hello\",\n      \ttext: \"world\",\n      \tcolor: \"blue\",\n      \ttimeout: 10,\n      \tdetails: \"what's up?\"})\n   */\n  static async notify(titleOrOptions, text, timeout, cb, color) {\n    try {\n      // #TODO make native notifications opitional?\n      // this.nativeNotify(title, text, timeout, cb)\n      var title = titleOrOptions;\n      new LivelyNotification({ title, text }).displayOnConsole();\n      if (titleOrOptions && titleOrOptions.title) {\n        title = titleOrOptions.title;\n        text = titleOrOptions.title;\n        timeout = titleOrOptions.timeout;\n        cb = titleOrOptions.more;\n        color = titleOrOptions.color;\n\n        // open details in a workspace\n        if (titleOrOptions.details) {\n          cb = () => {\n            lively.openWorkspace(titleOrOptions.details).then(comp => {\n              comp.parentElement.setAttribute(\"title\", title);\n              comp.unsavedChanges = () => false; // close workspace without asking\n            });\n          };\n        }\n      }\n\n      var notificationList = document.querySelector(\"lively-notification-list\");\n      if (!notificationList) {\n        notificationList = await lively.create(\"lively-notification-list\", document.body);\n        notificationList.addNotification(title, text, timeout, cb, color);\n      } else {\n        var duplicateNotification = Array.from(document.querySelectorAll(\"lively-notification\")).find(ea => \"\" + ea.title === \"\" + title && \"\" + ea.message === \"\" + text);\n        if (duplicateNotification) {\n          duplicateNotification.counter++;\n          duplicateNotification.render();\n        } else {\n          notificationList.addNotification(title, text, timeout, cb, color);\n        }\n      }\n    } catch (e) {\n      console.log('%cERROR in lively.notify', 'font-size: 9px; color: red', e);\n    }\n  }\n\n  static success(title, text, timeout, cb) {\n    lively.notify(title, text, timeout, cb, 'green');\n  }\n\n  static warn(title, text, timeout, cb) {\n    lively.notify(title, text, timeout, cb, 'yellow');\n  }\n\n  static error(title, text, timeout, cb) {\n    debugger;\n    lively.notify(title, text, timeout, cb, 'red');\n  }\n\n  static async ensureHand() {\n    var hand = lively.hand;\n    if (!hand) {\n      hand = await lively.create(\"lively-hand\", document.body);\n      hand.style.visibility = \"hidden\";\n    }\n    return hand;\n  }\n\n  // we do it lazy, because a hand can be broken or gone missing...\n  static get hand() {\n    return document.body.querySelector(\":scope > lively-hand\");\n  }\n\n  static get selection() {\n    return Selection.current;\n    // var selection = document.body.querySelector(\":scope > lively-selection\")\n    // if (!selection) {\n    //   selection = document.createElement(\"lively-selection\")\n    //   lively.components.openInBody(selection);\n    // }\n    // return selection\n  }\n\n  /*MD \n  # Inititialization \n  \n  MD*/\n\n  // lively.ini\n  static initializeEvents(doc) {\n    doc = doc || document;\n    this.addEventListener('lively', doc, 'mousedown', evt => lively.onMouseDown(evt), true); // capture...\n    this.addEventListener('lively', doc, 'contextmenu', evt => lively.onContextMenu(evt), false);\n    this.addEventListener('lively', doc, 'click', function (evt) {\n      lively.hideContextMenu(evt);\n    }, false);\n    this.addEventListener('lively', doc, 'keydown', function (evt) {\n      lively.keys.handle(evt);\n    }, false);\n\n    this.addEventListener('lively', doc, 'keyup', function (evt) {\n      lively.keys.onKeyUp(evt);\n    }, false);\n    events.installHooks();\n  }\n\n  static async initializeDocument(doc, loadedAsExtension, loadContainer) {\n\n    this.loadedAsExtension = loadedAsExtension;\n\n    await modulesExported;\n\n    this.loadedAsExtension = loadedAsExtension;\n\n    console.log(\"Lively4 initializeDocument\");\n    // persistence.disable();\n\n    await lively.loadCSSThroughDOM(\"font-awesome\", lively4url + \"/src/external/font-awesome/css/font-awesome.min.css\");\n\n    lively.components.loadByName(\"lively-notification\");\n    lively.components.loadByName(\"lively-notification-list\");\n\n    this.initializeEvents(doc);\n    this.initializeHalos();\n\n    lively.addEventListener(\"preventDragCopy\", document, \"dragstart\", evt => {\n      if (evt.composedPath()[0] === document.body) {\n        evt.stopPropagation();\n        evt.preventDefault();\n      }\n    });\n\n    console.log(window.lively4stamp, \"load local lively content \"\n    // #RACE #TODO ... \n\n    // yes, we want also to change style of external websites...\n    );await lively.loadCSSThroughDOM(\"lively4\", lively4url + \"/src/client/lively.css\");\n\n    await persistence.current.loadLivelyContentForURL();\n    preferences.loadPreferences();\n    if (preferences.get('TipOfTheDay')) {\n      const existingContainers = Array.from(document.body.querySelectorAll('lively-code-tip'));\n      if (existingContainers.length !== 0) {\n        existingContainers.map(tip => tip.parentElement.remove());\n      }\n      lively.openComponentInWindow(\"lively-code-tip\", undefined, lively.pt(800, 200));\n    }\n    // here, we should scrap any existing (lazyly created) preference, there should only be one\n\n    await lively.ensureHand();\n\n    // lively.selection;\n\n    // #Hack... just to be on the save side #ACM\n    // where to put side specific adapations... cannot be overriden by CSS? #TODO\n    document.body.style.textAlign = \"left\";\n\n    if (loadedAsExtension) {\n      lively.notify(\"Lively4 extension loaded!\", \"  CTRL+LeftClick  ... open halo\\n\" + \"  CTRL+RightClick ... open menu\");\n    } else {\n\n      // only scroll thrugh CTRL+drag #TODO what does UX say?\n      // document.body.style.overflow = \"hidden\"\n\n      var titleTag = document.querySelector(\"title\");\n      if (!titleTag) {\n        titleTag = document.createElement(\"title\");\n        titleTag.textContent = \"Lively 4\";\n        document.head.appendChild(titleTag);\n      }\n\n      document.body.style.backgroundColor = \"rgb(240,240,240)\";\n      ViewNav.enable(document.body);\n\n      this.loadContainer = loadContainer; // remember....\n      // if (loadContainer && lively.preferences.get(\"ShowFixedBrowser\")) {\n      //   this.showMainContainer()\n      // }\n    }\n\n    if (this.deferredUpdateScroll) {\n      document.scrollingElement.scrollLeft = this.deferredUpdateScroll.x;\n      document.scrollingElement.scrollTop = this.deferredUpdateScroll.y;\n      delete this.deferredUpdateScroll;\n    }\n\n    console.log(\"FINISHED Loading in \" + ((performance.now() - lively4performance.start) / 1000).toFixed(2) + \"s\");\n    console.log(window.lively4stamp, \"lively persistence start \");\n\n    setTimeout(() => {\n      console.log(\"start persistence...\");\n      persistence.current.start();\n    }, 2000);\n  }\n\n  static async showMainContainer() {\n    var container = document.querySelector('main-content');\n    if (!container) {\n      var w = await lively.create(\"lively-window\");\n      document.body.appendChild(w);\n      container = await lively.create(\"lively-container\");\n      w.appendChild(container);\n      container.becomeMainContainer();\n    }\n    return container;\n  }\n\n  static initializeHalos() {\n    if (!window.lively) {\n      return setTimeout(() => {\n        this.initializeHalos();\n      }, 100);\n    }\n    if (!document.body.querySelector('lively-halo')) {\n      lively.components.openInBody(document.createElement('lively-halo')).then(comp => {\n        comp.setAttribute('data-lively4-donotpersist', 'all');\n      });\n    }\n  }\n\n  static unload() {\n\n    lively.notify(\"unloading Lively is not supported yet! Please reload page....\");\n  }\n\n  /*\n   * After changing code... we have to update intances...\n   * a) don't touch the instance, just update the class\n   *\n   */\n  static async updateTemplate(html, url) {\n    var tagName = await components.reloadComponent(html, url);\n    if (!tagName) return;\n\n    // conservative approach:\n    // let objectToMigrate = Array.from(document.body.querySelectorAll(tagName));\n    \n    // realy take every element yout can find, even if it might break things #Experimental\n    let objectToMigrate = []\n    for(let ea of lively.allElements(true)) {\n      if (ea.localName == tagName) {\n        objectToMigrate.push(ea)\n      }\n    }\n    \n    if (lively.halo) {\n      objectToMigrate.push(...lively.halo.shadowRoot.querySelectorAll(tagName));\n    }\n    objectToMigrate.forEach(oldInstance => {\n      if (oldInstance.__ignoreUpdates) return;\n      if (oldInstance.livelyUpdateStrategy !== 'migrate') return;\n\n      // if (oldInstance.isMinimized && oldInstance.isMinimized()) return // ignore minimized windows\n      // if (oldInstance.isMaximized && oldInstance.isMaximized()) return // ignore isMaximized windows\n\n      var owner = oldInstance.parentElement || oldInstance.parentNode;\n      var newInstance = document.createElement(tagName);\n\n      if (oldInstance.livelyPreMigrate) {\n        oldInstance.livelyPreMigrate(oldInstance);\n      }\n      if (owner) {\n        owner.replaceChild(newInstance, oldInstance);\n      }\n      Array.from(oldInstance.childNodes).forEach(ea => {\n        if (ea) {\n          // there are \"undefined\" elemented in childNodes... sometimes #TODO\n          newInstance.appendChild(ea);\n          // console.log(\"append old child: \" + ea);\n        }\n      });\n\n      Array.from(oldInstance.attributes).forEach(ea => {\n        // console.log(\"set old attribute \" + ea.name + \" to: \" + ea.value);\n        newInstance.setAttribute(ea.name, ea.value);\n      });\n\n      // Migrate Position\n      if (oldInstance.style.position == \"absolute\") {\n        newInstance.style.top = oldInstance.style.top;\n        newInstance.style.left = oldInstance.style.left;\n      }\n\n      // Migrate \"that\" pointer\n      if (window.that == oldInstance) {\n        window.that = newInstance;\n      }\n\n      if (newInstance.livelyMigrate) {\n        newInstance.livelyMigrate(oldInstance); // give instances a chance to take over old state...\n      }\n\n      // #LiveProgrammingHack\n      document.querySelectorAll(\"lively-inspector\").forEach(inspector => {\n        if (inspector.targetObject === oldInstance) {\n          inspector.inspect(newInstance);\n        }\n      });\n    });\n\n    // new (old) strategy... don't throw away the instance... just update them inplace?\n    lively.findAllElements(ea => ea.tagName == tagName.toUpperCase(), true).forEach(ea => {\n      if (ea.livelyUpdate) {\n        try {\n          ea.livelyUpdate();\n        } catch (e) {\n          console.error(e);\n        }\n      }\n    });\n  }\n\n  static showInfoBox(target) {\n    var info = document.createElement(\"div\");\n    info.classList.add(\"draginfo\");\n    info.target = target;\n    info.isMetaNode = true;\n    info.style.width = \"300px\";\n    info.style['pointer-events'] = \"none\";\n    info.setAttribute(\"data-is-meta\", \"true\");\n    info.style.color = \"darkblue\";\n    info.update = function () {\n      lively.setGlobalPosition(this, lively.getGlobalPosition(this.target).subPt(pt(0, 20)));\n    };\n    info.style['z-index'] = 10000;\n    info.update();\n    lively.addEventListener(\"ShowInfoBox\", target, \"position-changed\", () => {\n      info.update();\n    });\n    info.stop = function () {\n      this.remove();\n      lively.removeEventListener(\"ShowInfoBox\", target, \"position-changed\");\n    };\n\n    document.body.appendChild(info);\n    return info;\n  }\n\n  static showPoint(point, removeAfterTime) {\n    return this.showRect(point, pt(5, 5), removeAfterTime);\n  }\n\n  static showEvent(evt, removeAfterTime) {\n    var r = lively.showPoint(pt(evt.clientX, evt.clientY), removeAfterTime);\n    r.style.backgroundColor = \"rgba(100,100,255,05)\";\n    return r;\n  }\n\n  static showRect(point, extent, removeAfterTime = 3000) {\n    // check for alternative args\n    if (point && !extent) {\n      extent = point.extent();\n      point = point.topLeft();\n    }\n\n    if (!point || !point.subPt) return;\n    var comp = document.createElement(\"div\");\n    comp.style['pointer-events'] = \"none\";\n    comp.style.width = extent.x + \"px\";\n    comp.style.height = extent.y + \"px\";\n    comp.style.padding = \"1px\";\n    comp.style.backgroundColor = 'rgba(255,0,0,0.5)';\n    comp.style.zIndex = 1000;\n    comp.isMetaNode = true;\n\n    var bodyBounds = document.body.getBoundingClientRect();\n\n    document.body.appendChild(comp);\n    lively.setPosition(comp, point.subPt(pt(bodyBounds.left, bodyBounds.top)));\n    comp.setAttribute(\"data-is-meta\", \"true\");\n\n    if (removeAfterTime) {\n      setTimeout(() => comp.remove(), removeAfterTime);\n    }\n    // ea.getBoundingClientRect\n    return comp;\n  }\n\n  static showPath(path, color, printArrow, timeoutOrFalse = 3000) {\n    color = color || \"red\";\n    var comp = this.createPath(path, color, printArrow);\n    document.body.appendChild(comp);\n    comp.style.zIndex = 1000;\n    lively.setGlobalPosition(comp, pt(0, 0));\n    comp.setAttribute(\"data-is-meta\", \"true\");\n    comp.isMetaNode = true;\n    comp.style.pointerEvents = \"none\";\n    comp.style.touchAction = \"none\";\n    if (timeoutOrFalse) setTimeout(() => comp.remove(), timeoutOrFalse);\n    return comp;\n  }\n\n  static createPath(path, color, printArrow, label) {\n    if (!path || path.length < 1) return;\n    if (printArrow === undefined) printArrow = true;\n\n    var comp = document.createElementNS(\"http://www.w3.org/2000/svg\", \"svg\");\n    comp.style = `position: absolute;\n        top: 0px;\n        left: 0px;\n        width: 100px;\n        height: 100px;\n        border: none;\n        opacity: 1;\n        overflow: visible;`;\n\n    var dpath = path.map((ea, i) => (i == 0 ? \"M \" : \"L \") + ea.x + \" \" + ea.y).join(\" \");\n    var defs = `      <defs>\n          <marker id=\"markerArrow\" markerWidth=\"13\" markerHeight=\"13\" refX=\"2\" refY=\"6\"\n                 orient=\"auto\">\n              <path d=\"M2,2 L2,11 L10,6 L2,2\" style=\"fill: ${color};\" />\n          </marker>\n       </defs>`;\n\n    var last = _.last(path);\n\n    comp.innerHTML = defs + `<path id=\"path\" fill=\"none\" stroke='${color}' d='${dpath}' \n      style='${printArrow ? 'marker-end: url(#markerArrow);' : \"\"}'></path>` + `<g font-size=\"12\" font-family=\"sans-serif\" fill=\"${color}\" stroke=\"none\"\n  text-anchor=\"middle\">\n    <text x=\"${last.x}\" y=\"${last.y}\" dx=\"10\">${label ? label : \"\"}</text>\n  </g>`;\n\n    return comp;\n  }\n\n  static async showSource(object, evt) {\n    if (object instanceof HTMLElement) {\n      if (!object.localName.match(/-/)) {\n        return lively.notify(\"Could not show source for native element\");\n      }\n      lively.openBrowser((await this.components.searchTemplateFilename(object.localName + \".html\")), true);\n    } else {\n      lively.notify(\"Could not show source for: \" + object);\n    }\n  }\n\n  static async showClassSource(object, evt) {\n    if (object instanceof HTMLElement) {\n      if (!object.localName.match(/-/)) {\n        return lively.notify(\"Could not show source for native element\");\n      }\n      let templateFile = await this.components.searchTemplateFilename(object.localName + \".html\"),\n          source = await fetch(templateFile).then(r => r.text()),\n          template = lively.html.parseHTML(source).find(ea => ea.tagName == \"TEMPLATE\"),\n          moduleURL = await this.components.searchTemplateFilename(object.localName + \".js\");\n      lively.openBrowser(moduleURL, true);\n    } else {\n      lively.notify(\"Could not show source for: \" + object);\n    }\n  }\n\n  static showElement(elem, timeout = 3000) {\n    if (!elem || !elem.getBoundingClientRect) return;\n    var comp = document.createElement(\"div\");\n    var bounds = elem.getBoundingClientRect();\n    var bodyBounds = document.body.getBoundingClientRect();\n    var offset = pt(bodyBounds.left, bodyBounds.top);\n    var pos = pt(bounds.left, bounds.top).subPt(offset);\n\n    comp.style.width = bounds.width + \"px\";\n    comp.style.height = bounds.height + \"px\";\n    comp.style['pointer-events'] = \"none\";\n    // comp.style.height = \"0px\"\n    comp.style[\"z-index\"] = 1000;\n    comp.style.border = \"1px solid red\";\n    comp.isMetaNode = true;\n    document.body.appendChild(comp);\n    lively.setPosition(comp, pos);\n    comp.setAttribute(\"data-is-meta\", \"true\");\n\n    comp.innerHTML = \"<pre data-is-meta='true' style='position: relative; top: -8px; width: 200px; background: rgba(255,255,255,0.8); color: red; font-size: 8pt'>\" + elem.tagName + \": \" + elem.id + \"\\n\" + elem.getAttribute(\"class\") + \"\\n\" + \"</pre>\";\n\n    if (timeout) setTimeout(() => comp.remove(), timeout);\n    return comp;\n  }\n\n  // highlight and show log info on element\n  static showLog(elem, log = \"\", timeout) {\n\n    var lastDebugLayer = debugLogHightlights.get(elem);\n    if (!lastDebugLayer || !lastDebugLayer.parentElement) {\n      var debugText = \"\";\n    } else {\n      debugText = lastDebugLayer.querySelector(\"pre\").textContent;\n    }\n    var debugLayer = lively.showElement(elem, timeout);\n    debugLogHightlights.set(elem, debugLayer);\n    debugLayer.querySelector(\"pre\").textContent = debugText + \"\\n\" + log;\n  }\n\n  static async showProgress(label) {\n    var progressContainer = document.querySelector(\"#progressContainer\");\n    if (!progressContainer) {\n      progressContainer = document.createElement(\"div\");\n      progressContainer.id = \"progressContainer\";\n      progressContainer.isMetaNode = true;\n      // progressContainer.style['pointer-events'] = \"none\";\n      progressContainer.style.zIndex = 1000;\n      document.body.appendChild(progressContainer);\n      lively.setGlobalPosition(progressContainer, pt(50, 50));\n    }\n\n    var progress = document.createElement(\"lively-progress\");\n    await components.openIn(progressContainer, progress);\n    lively.setExtent(progress, pt(300, 20));\n    progress.textContent = label;\n    return progress;\n  }\n\n  static allProperties(obj, result) {\n    result = result || {};\n    Object.getOwnPropertyNames(obj).forEach(name => {\n      result[name] = obj.constructor.name;\n    });\n    if (obj.__proto__) {\n      lively.allProperties(obj.__proto__, result);\n    }\n    return result;\n  }\n\n  static templateClassNameToTemplateName(className) {\n    return className.replace(/[A-Z]/g, ea => \"-\" + ea.toLowerCase()).replace(/^-/, \"\");\n  }\n\n  // Example code for looking up templates in links:\n  // Array.from(document.head.querySelectorAll(\"link\"))\n  //   .filter(ea => ea.getAttribute(\"rel\") == \"import\")\n  //   .map(ea => ea.href)\n  //   .find(ea => ea.endsWith(\"lively-digital-clock.html\"))\n\n  static async registerTemplate() {\n    var template = document.currentScript.ownerDocument.querySelector('template');\n    var clone = document.importNode(template.content, true);\n    var proto;\n    var className = template.getAttribute(\"data-class\");\n    if (className) {\n      // className = \"LivelyFooBar\"\n      let baseName = this.templateClassNameToTemplateName(className);\n      var url = await this.components.searchTemplateFilename(baseName + \".js\");\n      if (url) {\n        // console.log(\"Components: load module \" + url)\n        var module = await System.import(url);\n        proto = Object.create(module.prototype || module.default.prototype);\n      } else {\n        throw new Error(\"Components: could not find module for \" + baseName);\n      }\n    }\n    components.register(template.id, clone, proto);\n  }\n\n  static get eventListeners() {\n    if (!window.livelyEventListeners) {\n      window.livelyEventListeners = [];\n    }\n    return window.livelyEventListeners;\n  }\n\n  static set eventListeners(list) {\n    window.livelyEventListeners = list;\n  }\n\n  // Registration and deregistration of eventlisteners for run-time programming...\n  static addEventListener(domain, target, type, listener, options) {\n    this.eventListeners.push({ target: target, type: type, listener: listener, domain: domain, options: options });\n    target.addEventListener(type, listener, options);\n  }\n\n  static removeEventListener(domain, target, type, listener) {\n    this.eventListeners = this.eventListeners.filter(ea => {\n      if ((!target || ea.target === target) && (!type || ea.type == type) && (!listener || ea.listener === listener) && (!domain || ea.domain == domain)) {\n        // actually removing the event listener\n        // console.log(\"removeEventListener\", ea.target, ea.type, ea.listener)\n        ea.target.removeEventListener(ea.type, ea.listener, ea.options);\n        return false;\n      } else {\n        return true;\n      }\n    });\n  }\n\n  static openSearchWidget(text, worldContext, searchContext = document.body) {\n    if (lively.preferences.get(\"FileIndex\")) {\n      this.openComponentInWindow(\"lively-index-search\").then(comp => {\n        var pattern = text.replace(/[.?*+^$[\\]\\\\(){}|-]/g, \"\\\\$&\");\n        comp.search(pattern);\n        lively.setExtent(comp.parentElement, pt(1000, 700));\n        comp.focus();\n      });\n    } else {\n      var container = lively.query(searchContext, \"lively-container\");\n      this.openComponentInWindow(\"lively-search\", undefined, undefined, worldContext).then(comp => {\n        if (container) {\n          // search in the current repository\n          var url = container.getURL().toString();\n          var base = lively4url.replace(/[^/]*$/, \"\");\n          if (url.match(base)) {\n            var repo = url.replace(base, \"\").replace(/\\/.*$/, \"\");\n            comp.searchRoot = repo;\n          }\n        }\n        comp.searchFile(text);\n        comp.focus();\n      });\n    }\n\n    // #Depricated\n    // var comp = document.getElementsByTagName(\"lively-search-widget\")[0];\n    // if (comp.isVisible && text == comp.query) {\n    //   comp.isVisible = false;\n    // } else {\n    //   comp.isVisible = true;\n    //   comp.search(text, true);\n    // }\n  }\n\n  static hideSearchWidget() {\n    console.log('hide search widget');\n    document.body.querySelectorAll(\"lively-search\").forEach(ea => ea.parentElement.remove());\n  }\n\n  static openIssue(number) {\n    // #TODO customize or derive github issue url, making it context cependend\n    window.open(\"https://github.com/LivelyKernel/lively4-core/issues/\" + number);\n  }\n\n  static openHelpWindow(text) {\n    this.openComponentInWindow(\"lively-help\").then(comp => {\n      comp.parentElement.style.width = \"850px\";\n      comp.parentElement.style.height = \"600px\";\n      comp.getHelp(text);\n    });\n  }\n\n  static async openComponentInWindow(name, globalPos, extent, worldContext) {\n    worldContext = worldContext || document.body;\n\n    var w = await lively.create(\"lively-window\");\n    if (extent) {\n      lively.setExtent(w, extent);\n    }\n    if (!globalPos) {\n      let pos = lively.findPositionForWindow(worldContext);\n      globalPos = lively.getGlobalPosition(worldContext).addPt(pos);\n    }\n\n    return components.openIn(worldContext, w, true).then(w => {\n      lively.setGlobalPosition(w, globalPos);\n\n      return components.openIn(w, document.createElement(name)).then(comp => {\n        components.ensureWindowTitle(comp, w);\n        return comp;\n      });\n    });\n  }\n\n  static findPositionForWindow(worldContext) {\n    // this gets complicated: find a free spot starting top left going down right\n    var windows = Array.from(worldContext.querySelectorAll(\":scope > lively-window\"));\n    var offset = 20;\n    var pos;\n    var topLeft = pt(50, 50);\n\n    for (var i = 0; !pos; i++) {\n      let p1 = pt(i * offset, i * offset);\n      let p2 = pt((i + 1) * offset, (i + 1) * offset);\n      var found = windows.find(ea => {\n        // var ea = that; var i =0\n        var eaPos = lively.getGlobalPosition(ea).subPt(topLeft\n        // check if there is a window in direction bottom right\n        );return (p1.lessPt(eaPos) || p1.eqPt(eaPos)) && eaPos.lessPt(p2);\n      });\n      // no window is found... so place the next there\n      if (!found) pos = topLeft.addPt(pt(i * offset, i * offset));\n    }\n    return pos.subPt(lively.getGlobalPosition(worldContext));\n  }\n\n  // lively.openBrowser(\"https://lively4/etc/mounts\", true, \"Github\")\n\n\n  static async openBrowser(url, edit, patternOrPosition, replaceExisting, worldContext, useExisting) {\n    worldContext = worldContext || document.body;\n    \n    if (patternOrPosition && patternOrPosition.start) {\n      var locationObject = patternOrPosition;\n    } else if (patternOrPosition && patternOrPosition.line) {\n      var lineAndColumn = patternOrPosition;\n    } else {\n      var pattern = patternOrPosition;\n    }\n\n    if (!url || !url.match(/^[a-z]+:/)) url = lively4url;\n    var livelyContainer;\n    var containerPromise;\n    let existingFound = false;\n    if (replaceExisting) {\n      livelyContainer = Array.from(worldContext.querySelectorAll(\"lively-container\")).find(ea => ea.isSearchBrowser);\n    } else if (useExisting) {\n      const containers = Array.from(worldContext.querySelectorAll('lively-container')).filter(c => c.getAttribute('src') === url);\n      livelyContainer = containers.find(c => c.getAttribute('mode') === 'edit' === edit);\n      existingFound = !!livelyContainer;\n    }\n\n    var lastWindow = _.first(Array.from(worldContext.querySelectorAll(\"lively-window\")).filter(ea => ea.childNodes[0] && ea.childNodes[0].isSearchBrowser));\n\n    containerPromise = livelyContainer ? Promise.resolve(livelyContainer) : lively.openComponentInWindow(\"lively-container\", undefined, undefined, worldContext);\n\n    return containerPromise.then(comp => {\n      if (existingFound) {\n        if(comp.parentElement.isMinimized()) {\n          comp.parentElement.toggleMinimize();\n        }\n        comp.parentElement.focus();\n        comp.focus();\n        return;\n      }\n      livelyContainer = comp;\n      livelyContainer.hideNavbar();\n      comp.parentElement.style.width = \"950px\";\n      comp.parentElement.style.height = \"800px\";\n\n      if (lastWindow) {\n        lively.setPosition(comp.parentElement, lively.getPosition(lastWindow).addPt(pt(25, 25)));\n      }\n\n      if (edit) comp.setAttribute(\"mode\", \"edit\");\n      if (pattern) {\n        comp.isSearchBrowser = true;\n        comp.hideNavbar();\n      }\n      comp.focus();\n      return comp.followPath(url);\n    }).then(async () => {\n      if (edit) {\n        await livelyContainer.asyncGet(\"#editor\").then(async livelyEditor => {\n          var codeMirror = await livelyEditor.awaitEditor();\n\n          if (pattern) {\n            livelyEditor.find(pattern);\n          } else if (lineAndColumn) {\n\n            codeMirror.setSelection(\n              { line: lineAndColumn.line, ch: lineAndColumn.column }, \n              { line: lineAndColumn.line, ch: lineAndColumn.column + (lineAndColumn.selection ? +lineAndColumn.selection.length : 0) }\n            // #TODO ...\n            // ace.gotoLine(lineAndColumn.line, lineAndColumn.column)\n            );\n          } else if (locationObject) {\n            codeMirror.setSelection(locationObject.start, locationObject.end);\n          }\n          codeMirror.focus();\n          codeMirror.scrollIntoView(codeMirror.getCursor(), 200);\n        });\n      }\n      return livelyContainer;\n    });\n  }\n\n  static openDebugger() {\n    if (!window.lively4ChromeDebugger) {\n      return lively.notify(\"Please install Lively4Chrome Extension for debugger support.\");\n    }\n    window.lively4ChromeDebugger.getCurrentDebuggingTarget().then(res => {\n      // Use chrome.window.create to create an independent window, window.open does not work\n      window.lively4ChromeDebugger.createWindow({\n        url: lively4url + '/debugger.html?targetId=' + res.targetId,\n        width: 1000, left: parseInt((screen.width - 1000) / 2),\n        height: 750, top: parseInt((screen.height - 750) / 2),\n        type: 'popup'\n      }).catch(error => {\n        lively.notify(\"Unable to create new window for debugger.\");\n      });\n    });\n  }\n\n  static async openMarkdown(url, title = \"Markdown\", parameters = {}) {\n    var comp = await lively.openComponentInWindow(\"lively-markdown\", undefined, pt(1000, 800));\n    comp.setAttribute(\"url\", url);\n    var src = await fetch(url).then(r => r.text());\n    comp.parameters = parameters;\n    comp.setContent(src);\n    comp.parentElement.setAttribute(\"title\", title);\n    await comp.evaluated;\n\n    return comp;\n  }\n\n  static get(query) {\n    return document.querySelector(query);\n  }\n\n  static confirm(msg, customizeCB) {\n    return Dialog.confirm(msg, customizeCB);\n  }\n\n  static prompt(msg, value, customizeCB) {\n    return Dialog.prompt(msg, value, customizeCB);\n  }\n\n  static findWorldContext(element) {\n\n    if (!element) return document.body;\n    if (element.id == \"container-root\") return element;\n\n    if (!element.parentElement) {\n      // if (element.parentNode.host && element.parentNode.host.localName == \"lively-container\") {\n      //   return element.parentNode.host.getContentRoot()\n      // }\n      // ||  element.tagName == \"LIVELY-FIGURE\"\n      return element.parentNode; // shadow root\n    }\n\n    if (element.tagName == \"BODY\") return element;else return this.findWorldContext(element.parentElement);\n  }\n\n  static isActiveElement(element) {\n    var activeElemnt = this.activeElement();\n    return this.allParents(activeElemnt, [], true).includes(element);\n  }\n\n  static activeElement(worldContext, type) {\n    worldContext = worldContext || document;\n    var element = worldContext.activeElement;\n    if (type && element.localName == type) return element;\n    if (element.shadowRoot && element.shadowRoot.activeElement) return this.activeElement(element.shadowRoot, type); // probe if we want to go deeper\n    return element;\n  }\n\n  static findWindow(element) {\n    if (element.isWindow) return element;\n    if (element.parentNode) return this.findWindow(element.parentNode);\n    if (element.host) return this.findWindow(element.host);\n    return document.body; // nothing found... just use the body\n  }\n\n  // lively.print(document)\n  static print(obj) {\n    var s = \"\" + obj + \"{\";\n    for (var i in obj) {\n      if (!(obj[i] instanceof Function) && obj[i] !== undefined) s += i + \": \" + obj[i] + \"\\n\";\n    }\n    s + \"}\";\n    return s;\n  }\n\n  static allKeys(obj) {\n    var keys = [];\n    for (var i in obj) {\n      if (obj.hasOwnProperty(i) || obj.__lookupGetter__(i)) {\n        keys.push(i);\n      }\n    }\n    return keys;\n  }\n\n  static methods(obj) {\n    return Object.getOwnPropertyNames(obj).filter(ea => {\n      var desc = Object.getOwnPropertyDescriptor(obj, ea);\n      return desc.value && _.isFunction(desc.value);\n    });\n  }\n\n  /*MD ## Events MD*/\n\n  static onUnload() {\n    // #TODO How to deal with multiple open lively pages?\n    // last closing site wins!\n    // #IDEA: we could versionize the local content and saving to it will merge in conflicting changes first? But for this to work, we would need a change history in our local storage, too?\n    persistence.current.saveLivelyContent();\n  }\n\n  /* Change Preference Callbacks */\n\n  static async onInteractiveLayerPreference(enabled) {\n    if (enabled) {\n      await System.import(\"src/client/interactive.js\");\n      InteractiveLayer.beGlobal();\n    } else {\n      if (window.InteractiveLayer) InteractiveLayer.beNotGlobal();\n    }\n  }\n\n  static async onShowFixedBrowserPreference(enabled) {\n    if (!this.loadedAsExtension && enabled) {\n      this.showMainContainer();\n    } else {\n      var content = document.querySelector(\"#main-content\");\n      if (content && content.parentElement.isWindow) {\n        content.parentElement.remove();\n      }\n    }\n  }\n\n  static async onShowDocumentGridPreference(enabled) {\n    if (enabled) {\n      ViewNav.showDocumentGrid(document.body);\n    } else {\n      ViewNav.hideDocumentGrid(document.body);\n    }\n  }\n\n  static async onOfflineFirstPreference(enabled) {\n    // store it where the service worker can see it... before we are loaded\n    lively.focalStorage.setItem(\"swxOfflineFirst\", enabled);\n    if (navigator.serviceWorker && navigator.serviceWorker.controller) {\n      navigator.serviceWorker.controller.postMessage({\n        type: 'config',\n        option: \"offlineFirst\",\n        value: enabled\n      });\n    } else {\n      console.log(\"onOfflineFirstPreference: navigator.serviceWorker.controller not there?\");\n    }\n  }\n\n  static async onBodyPositionPreference(pos) {\n    lively.setPosition(document.body, pos);\n  }\n  \n  static async onEnableAEDebuggingPreference(debuggingEnabled) {\n    const brokenModules = [\"Connection.js\", \"triples.js\", \"knot-view.js\"]\n    const activeAEModules = Object.values(System.loads).filter((o) => {\n      try{\n        return o.metadata.pluginLoad.metadata.enable === \"aexpr\" && ! brokenModules.some(m => o.key.includes(m));\n      } catch (e) {\n        return false;\n      }\n    });\n    for(const module of activeAEModules) {\n      await lively.unloadModule(module.key);\n    }\n    for(const module of activeAEModules) {\n      await lively.reloadModule(module.key, true, true);\n    }\n    lively.notify(\"Changed AE debugging: \" + debuggingEnabled);\n  }\n\n  static async onBodyScrollPreference(pos) {\n    this.deferredUpdateScroll = pos;\n  }\n\n  static async onFileIndexPreference(bool) {\n    if (bool) {\n      this.updateFileIndexDirectory(lively4url + \"/\");\n    }\n  }\n\n  static async updateFileIndexDirectory(url) {\n    return new Promise(resolve => {\n      if (!this.fileIndexWorker) {\n        this.fileIndexWorker = new SystemjsWorker(\"src/worker/fileindex-worker.js\");\n      }\n\n      // fuck it this might break when called concurrently...\n      this.fileIndexWorker.onmessage = evt => {\n        if (evt.data.message == \"updateDirectoryFinished\") {\n          resolve();\n        }\n      };\n      this.fileIndexWorker.postMessage({ message: \"updateDirectory\", url: url });\n    });\n  }\n\n  /*\n   * Continousely send a message to swx to keep it alive, since it boots slowly...\n   */\n  static async onSWXKeepAlivePreference(bool) {\n    while (lively.preferences.get(\"SWXKeepAlive\")) {\n      if (navigator.serviceWorker && navigator.serviceWorker.controller) {\n        navigator.serviceWorker.controller.postMessage({\n          type: 'meta',\n          command: 'keepalive'\n        });\n      }\n      // console.log(\"swx keep alive\")\n      await lively.sleep(1000);\n    }\n  }\n\n  /*\n   * keep detailed bootlog in indexdb for later visualization and analysis\n   */\n  static async onLogBootPreference(bool) {\n    localStorage[\"logLivelyBoot\"] = bool;\n  }\n\n  /*MD ### Focus MD*/\n\n  static isGlobalKeyboardFocusElement(element) {\n    return element === document.body || element && element.id == \"copy-hack-element\" || element && element.tagName == \"LIVELY-CONTAINER\" && element.shadowRoot && !element.shadowRoot.activeElement;\n  }\n\n  static hasGlobalFocus() {\n    return this.isGlobalKeyboardFocusElement(document.activeElement);\n  }\n\n  static globalFocus() {\n    // document.querySelector('#copy-hack-element').remove()\n    // var copyHack = document.querySelector('#copy-hack-element')\n    //   if (!copyHack) {\n    //     copyHack = document.createElement(\"input\")\n    //     lively.setPosition(copyHack, pt(0,0))\n    //     lively.setExtent(copyHack, pt(30,30))\n    //     copyHack.style.backgroundColor = \"red\"\n    //     copyHack.id = \"copy-hack-element\"\n    //     copyHack.isMetaNode = true\n    //     document.body.appendChild(copyHack)\n    //   }\n    // lively.focusWithoutScroll(copyHack)\n\n    this.focusWithoutScroll(document.body);\n  }\n\n  // #TODO: feature is under development and will ship in Chrome 64\n  // same as element.focus({ preventScroll : true}); ?\n  static focusWithoutScroll(element) {\n    if (!element) return;\n\n    //console.log(\"focusWithoutScroll \" + element, lively.stack().toString())\n    var scrollTop = document.scrollingElement.scrollTop;\n    var scrollLeft = document.scrollingElement.scrollLeft;\n    element.focus({ preventScroll: true });\n    // the focus scrolls as a side affect, but we don't want that\n    document.scrollingElement.scrollTop = scrollTop;\n    document.scrollingElement.scrollLeft = scrollLeft;\n    //console.log(\"scroll back \" + scrollTop + \" \" + scrollLeft )\n  }\n\n  static ensureID(element) {\n    var id = element.getAttribute(\"data-lively-id\");\n    if (!id) {\n      id = generateUUID();\n      element.setAttribute(\"data-lively-id\", id);\n    }\n    return id;\n  }\n  \n \n  \n  static deeepElementByID(id) {\n    if (!id) return;\n    for(var ea of lively.allElements(true)) {\n      if (ea && ea.getAttribute && ea.getAttribute(\"data-lively-id\") == id) {\n        return ea\n      }\n    }\n  }\n\n  static elementByID(id, worldContext) {\n    if (!id) return;\n    worldContext = worldContext || document;\n    return worldContext.querySelector('[data-lively-id=\"' + id + '\"]');\n  }\n\n  static query(element, query) {\n    // lively.showElement(element)\n    var result = element.querySelector(query);\n    if (!result && element.isWindow) return; // scope that search to windows\n    if (!result && element.parentElement) result = this.query(element.parentElement, query);\n    if (!result && element.parentNode) result = this.query(element.parentNode, query);\n    if (!result && element.host && element.host.querySelector) result = this.query(element.host, query);\n    return result;\n  }\n\n  static waitOnQuerySelector(element, selector, maxtime) {\n    maxtime = maxtime || 10000;\n    var startTime = Date.now();\n    return new Promise((resolve, reject) => {\n      var check = () => {\n        var found = element.querySelector(selector);\n        if (found) resolve(found);else if (Date.now() - startTime > maxtime) reject();else setTimeout(check, 100);\n      };\n      check();\n    });\n  }\n\n  static elementToCSSName(element) {\n    try {\n      return element.localName + (element.id ? \"#\" + element.id : \"\") + (element.classList && element.classList.length > 0 ? \".\" + Array.from(element.classList).join(\".\") : \"\");\n    } catch (e) {\n      return \"\"; // silent fail.... \n    }\n  }\n\n  static async openPart(partName, worldContext = document.body) {\n    var data = await fetch(`${lively4url}/src/parts/${partName}.html`).then(t => t.text());\n    var element = lively.clipboard.pasteHTMLDataInto(data, worldContext);\n    element.setAttribute(\"data-lively-part-name\", partName);\n    return element;\n  }\n\n  static queryAll(element, query) {\n    var all = new Set();\n    element.querySelectorAll(query).forEach(ea => all.add(ea));\n    var containers = element.querySelectorAll(\"lively-container\");\n    containers.forEach(ea => {\n      ea.shadowRoot.querySelectorAll(query).forEach(ea => all.add(ea));\n    });\n    return Array.from(all);\n  }\n\n  static gotoWindow(element, justFocuWhenInBounds) {\n    element.focus();\n\n    if (!justFocuWhenInBounds) {\n      var elementBounds = lively.getGlobalBounds(element);\n      var windowBounds = rect(0, 0, window.innerWidth, window.innerHeight);\n      if (!windowBounds.containsRect(elementBounds)) {\n        // only do somthing if we are not visible\n        document.scrollingElement.scrollTop = 0;\n        document.scrollingElement.scrollLeft = 0;\n        var offset = pt(window.innerWidth, window.innerHeight).subPt(lively.getExtent(element));\n\n        var pos = lively.getPosition(element).subPt(offset.scaleBy(0.5));\n        lively.setPosition(document.body, pos.scaleBy(-1), undefined, 1000);\n      }\n    }\n  }\n\n  //  lively.allPreferences()\n  static allPreferences() {\n    var regexp = /on(.*)Preference/;\n    return Object.getOwnPropertyNames(lively).filter(ea => ea.match(regexp)).map(ea => ea.match(regexp)[1]);\n  }\n\n  static async bench(func) {\n    var s = Date.now();\n    await func();\n    return Date.now() - s;\n  }\n\n  static get halo() {\n    return HaloService.instance;\n  }\n\n  static onMouseDown(evt) {\n    // lively.showEvent(evt)\n    lively.lastScrollTop = document.scrollingElement.scrollTop;\n    lively.lastScrollLeft = document.scrollingElement.scrollLeft;\n  }\n\n  static async onContextMenu(evt) {\n    if (!evt.shiftKey) {\n      // evt.ctrlKey\n      evt.preventDefault();\n      evt.stopPropagation();\n\n      // #Hack #Workaround weired browser scrolling behavior\n      if (lively.lastScrollLeft || lively.lastScrollTop) {\n        document.scrollingElement.scrollTop = lively.lastScrollTop;\n        document.scrollingElement.scrollLeft = lively.lastScrollLeft;\n      }\n\n      if (self.__preventGlobalContextMenu__) {\n        return;\n      }\n\n      var link = Array.from(evt.composedPath()).find(ea => ea.localName == \"a\");\n      if (link) {\n        // #TODO can we shorten this or hide this context specific behavior, \n        // e.g. asking a link for href in the \"context\" of a lively container should\n        // produce the following behavior! #ContextJS #UseCase \n        var url = link.getAttribute(\"href\");\n        if (!url) return;\n        var container = await lively.query(link, \"lively-container\");\n        if (!url.match(/^[a-zA-Z0-9]+:/)) {\n          if (container) {\n            url = container.getURL().toString().replace(/[^/]*$/, \"\") + url;\n          }\n        }\n        var items = [];\n        if (container) {\n          items.push([\"follow\", () => {\n            container.followPath(url);\n          }]);\n        }\n        items.push([\"open in window\", () => {\n          lively.openBrowser(url);\n        }]);\n        items.push([\"edit in window\", () => {\n          lively.openBrowser(url, true);\n        }]);\n        var menu = new lively.contextmenu(this, items);\n        menu.openIn(document.body, evt, this);\n      } else {\n        lively.openContextMenu(document.body, evt);\n      }\n      return false;\n    }\n  }\n\n  static halt(time = 1000) {\n    window.setTimeout(() => {\n      debugger;\n    }, time);\n  }\n\n  static async sleep(time = 1000) {\n    return wait(time);\n  }\n\n  // check something, and sleep and check again... stop after found or timeout\n  // \"when in doubt let it tick\"\n  static async sleepUntil(cb, time = 5000, step = 50) {\n    var timeout;\n    lively.sleep(time).then(() => {\n      timeout = true;\n    });\n    var result;\n    while (!result && !timeout) {\n      result = cb();\n      await lively.sleep(step);\n    }\n    return result;\n  }\n\n  static async time(func) {\n    var start = performance.now();\n    if (func) {\n      await func();\n    }\n    return performance.now() - start;\n  }\n\n  // #transformation #TODO #BUG: if we name omitFn 'omit', the omit method from underscore is accessed as this reference!\n  // this might be due to rewriting (either var recorder or aexprs)\n  static stack({ debug = false, log = false, omitFn = lively.stack, max = Infinity } = {}) {\n    let stack = new Stack({ omitFn, max });\n\n    if (log) {\n      console.warn(stack);\n    }\n    if (debug) {\n      debugger;\n    }\n\n    return stack;\n  }\n\n  static allElements(deep = false, root = document.body, all = new Set()) {\n    if (deep && root.shadowRoot) {\n      this.allElements(deep, root.shadowRoot, all);\n    }\n    root.querySelectorAll(\"*\").forEach(ea => {\n      if (deep && ea.shadowRoot) {\n        this.allElements(deep, ea.shadowRoot, all);\n      }\n      all.add(ea);\n    });\n    all.add(root);\n    return all;\n  }\n\n  static allTextNodes(root) {\n    var n,\n        result = [],\n        walk = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, null, false);\n    while (n = walk.nextNode()) {\n      result.push(n);\n    }\n    return result;\n  }\n\n  static findAllElements(filterFunc, deep) {\n    return Array.from(this.allElements(deep)).filter(filterFunc);\n  }\n\n  static allParents(element, parents = [], deep = false) {\n    if (!element) return parents;\n    if (!element.parentElement) {\n      if (deep && element.parentNode) {\n        if (element.parentNode === document) {\n          return parents;\n        }\n        parents.push(element.parentNode);\n        parents.push(element.parentNode.host);\n\n        return this.allParents(element.parentNode.host, parents, deep);\n      } else {\n        return parents;\n      }\n    }\n    parents.push(element.parentElement);\n    this.allParents(element.parentElement, parents, deep);\n    return parents;\n  }\n\n  /* test if element is in DOM */\n  static isInBody(element) {\n    return this.allParents(element, undefined, true).includes(document.body);\n  }\n\n  static showHalo(element) {\n    window.that = element;\n    HaloService.showHalos(element);\n  }\n\n  static swxURL(url) {\n    var m = url.toString().match(/^([a-zA-Z0-9]+)\\:\\/?\\/?(.*)$/);\n    if (!m) {\n      throw new Error(\"coudl not convert url to an swx form: \" + url);\n    }\n    return \"https://lively4/scheme/\" + m[1] + \"/\" + m[2];\n  }\n\n  static allElementsFromPoint(pos, root = document, visited = new Set()) {\n    var result = [];\n    var elements = root.elementsFromPoint(pos.x, pos.y\n    // this is a workaround of the issue that elementsFromPoint contains parent elements...\n\n    );elements.filter(e => {\n      const notYetVisited = !visited.has(e);\n      visited.add(e);\n      return notYetVisited;\n    }).forEach(ea => {\n      if (ea.shadowRoot && ea.shadowRoot.elementsFromPoint) {\n        var shadowRootElements = this.allElementsFromPoint(pos, ea.shadowRoot, visited);\n        result.push(...shadowRootElements);\n      }\n      result.push(ea);\n    });\n\n    return result;\n  }\n\n  static registerSWXHandshake() {\n\n    if (!navigator.serviceWorker) {\n      console.warn(\"[lively] registerSWXHandshake fail: no serviceWorker found\");\n      return;\n    }\n    lively.removeEventListener(\"handshake\", navigator.serviceWorker);\n    lively.addEventListener(\"handshake\", navigator.serviceWorker, \"message\", async evt => {\n      try {\n        if (!evt.data.name || !evt.data.name.match(/swx:started/)) return; // not for me\n\n        if (!evt.ports[0]) {\n          console.warn(\"registerSWXHandshake got message... but could not answer\");\n          return;\n        }\n        console.log(\"[lively] SWX started\");\n        evt.ports[0].postMessage({\n          name: \"client:handshake\"\n        });\n      } catch (err) {\n        evt.ports[0].postMessage({ error: err });\n      }\n    });\n  }\n\n  static headersToJSO(headers) {\n    var o = {};\n    for (var [k, v] of headers.entries()) {\n      o[k] = v;\n    }\n    return o;\n  }\n\n  static registerSWXFetchHandler() {\n\n    if (!navigator.serviceWorker) {\n      console.warn(\"[lively] registerSWXFetchHandler faile: no serviceWorker found\");\n      return;\n    }\n    lively.removeEventListener(\"proxy\", navigator.serviceWorker);\n    lively.addEventListener(\"proxy\", navigator.serviceWorker, \"message\", async evt => {\n      try {\n        if (!evt.data.name || !evt.data.name.match('swx:proxy:')) return; // not for me\n\n        let url = evt.data.url;\n        if (!evt.ports[0]) {\n          console.warn(\"registerSWXFetchHandler got message... but could not answer\");\n          return;\n        }\n        if (evt.data.name == 'swx:proxy:GET') {\n          //  console.log(\"[lively] registerSWXFetchHandler FETCH SWX: \" + url)\n          var response = await fetch(url, {\n            method: \"GET\",\n            headers: Object.assign(evt.data.headers, {\n              \"lively-proxied\": \"true\"\n            })\n          });\n          evt.ports[0].postMessage({\n            content: await response.blob(),\n            ok: response.ok,\n            redirected: response.redirected,\n            status: response.status,\n            statusText: response.statusText,\n            type: response.type,\n            url: response.url,\n            headers: this.headersToJSO(response.headers)\n          });\n        }\n      } catch (err) {\n        evt.ports[0].postMessage({ error: err });\n      }\n    });\n  }\n  \n  static runDevCodeAndLog() {\n    // #Experimental #Live #FeedbackLoop\n    var devcode = document.body.querySelector(\"#DEVCODE\")\n    var devlog = document.body.querySelector(\"#DEVLOG\")\n    if (devcode && devlog) {\n      devlog.value = \"working on it... wait\"\n      lively.sleep(100).then( async () => {\n       var result = await devcode.boundEval(devcode.value) \n       var value =result.value\n       if (value.then) value = await value;\n       devlog.value = \"\" + value\n     })\n  }\n\n  }\n}\n\nif (!window.lively || window.lively.name != \"Lively\") {\n  window.lively = Lively;\n  console.log(window.lively4stamp, \"loaded lively intializer\");\n  // only load once... not during development\n  Lively.loaded();\n} else {\n  var oldLively = window.lively;\n  Lively.previous = oldLively;\n  Lively.fileIndexWorker = oldLively.fileIndexWorker;\n  window.lively = Lively;\n}\n\n// #TODO pull this this out into boot.js #Continue\nlively.registerSWXFetchHandler // #BUG this is to late for booting lively itself if not everthing is in the zip\n\n();lively.registerSWXHandshake();\n\nvar modulesExported = Lively.exportModules();\n"]}