Remove outdated examples and framework pieces

sky/framework/sky-element/element-registry.sky

Index: sky/framework/sky-element/element-registry.sky
diff --git a/sky/framework/sky-element/element-registry.sky b/sky/framework/sky-element/element-registry.sky
deleted file mode 100644
index ba317a808c18719a32f1f5515400d7b01540083f..0000000000000000000000000000000000000000
--- a/sky/framework/sky-element/element-registry.sky
+++ /dev/null
@@ -1,179 +0,0 @@
-<!--
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
--->
-<import src="sky-binder.sky" as="binder" />
-<script>
-// TODO(esprehn): It would be nice if these were exposed by the platform so
-// the framework didn't need to hard code a list.
-var globalAttributesNames = new Set([
-  'class',
-  'contenteditable',
-  'dir',
-  'id',
-  'lang',
-  'spellcheck',
-  'tabindex',
-  'style',
-]);
-
-function isExpandableAttribute(name) {
-  return name.startsWith('data-') || name.startsWith('on-');
-}
-
-function isGlobalAttribute(name) {
-  if (isExpandableAttribute(name))
-    return true;
-  return globalAttributesNames.has(name);
-}
-
-var attributeConverters = {
-  boolean: function(value) {
-    if (typeof value == 'string')
-      return value == 'true';
-    return !!value;
-  },
-  number: function(value) {
-    return Number(value);
-  },
-  string: function(value) {
-    if (value === null)
-      return '';
-    return String(value);
-  },
-};
-
-function eventHandlerCallback(event) {
-  var element = event.currentTarget;
-  var registration = getRegistration(element.localName);
-  var method = registration.eventHandlers.get(event.type);
-  var handler = element[method];
-  if (!(typeof handler == 'function')) {
-    throw new Error('Element ' + element.localName +
-        ' specifies invalid event handler "' + method + '"');
-  }
-  handler.call(element, event);
-}
-
-class ElementRegistration {
-  constructor(tagName) {
-    this.tagName = tagName;
-    this.attributes = new Map();
-    this.eventHandlers = new Map();
-    this.template = null;
-    Object.preventExtensions(this);
-  }
-
-  allowsAttribute(name) {
-    if (isGlobalAttribute(name))
-      return true;
-    if (this.attributes.has(name))
-      return true;
-    return false;
-  }
-
-  defineAttribute(name, type) {
-    var converter = attributeConverters[type];
-
-    if (!converter) {
-      console.error('Invalid attribute type "' + type + '", type must be one'
-          + ' of boolean, number or string.');
-      return;
-    }
-
-    this.attributes.set(name, converter);
-  }
-
-  synthesizeAttributes(prototype) {
-    this.attributes.forEach(function(converter, name) {
-      Object.defineProperty(prototype, name, {
-        get: function() {
-          return converter(this.getAttribute(name));
-        },
-        set: function(newValue) {
-          this.setAttribute(name, converter(newValue));
-        },
-        enumerable: true,
-        configurable: true,
-      });
-    });
-  }
-
-  addInstanceEventListeners(instance) {
-    for (var eventName of this.eventHandlers.keys()) {
-      instance.addEventListener(eventName, eventHandlerCallback);
-    }
-  }
-}
-
-var registrations = new Map();
-
-function registerElement(tagName, attributes) {
-  if (registrations.has(tagName))
-    throw new Error('tagName "' + tagName + '" registered twice.');
-  var registration = new ElementRegistration(tagName);
-  for (var name in attributes) {
-    registration.defineAttribute(name, attributes[name]);
-  }
-  registrations.set(tagName, registration);
-  return registration;
-}
-
-function getRegistration(tagName) {
-  return registrations.get(tagName);
-}
-
-function checkAttribute(tagName, attrName) {
-  var registration = getRegistration(tagName);
-
-  if (!registration)
-    return isGlobalAttribute(attrName);
-
-  return registration.allowsAttribute(attrName);
-}
-
-registerElement('img', {
-  'width': 'number',
-  'height': 'number',
-  // TODO(esprehn): Sky probably doesn't want the crossorign attr.
-  'crossorigin': 'string',
-  'src': 'string',
-});
-
-registerElement('import', {
-  'as': 'string',
-  'src': 'string',
-  'async': 'boolean',
-});
-
-registerElement('a', {
-  'href': 'string',
-  'async': 'boolean',
-});
-
-registerElement('content', {
-  'select': 'string',
-});
-
-registerElement('style', {
-  'media': 'string',
-});
-
-registerElement('template', {
-  'if': 'string',
-  'repeat': 'string',
-});
-
-registerElement('iframe', {
-  'src': 'string',
-});
-
-module.exports = {
-  registerElement: registerElement,
-  getRegistration: getRegistration,
-  checkAttribute: checkAttribute,
-  isGlobalAttribute: isGlobalAttribute,
-  isExpandableAttribute: isExpandableAttribute,
-};
-</script>