| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 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. |
| --> |
| |
| <link rel="import" href="/base/extension_registry.html"> |
| |
| <script> |
| 'use strict'; |
| |
| /** |
| * @fileoverview Provides the EventRegistry class. |
| */ |
| tr.exportTo('tr.model', function() { |
| // Create the type registry. |
| function EventRegistry() { |
| } |
| |
| var options = new tr.b.ExtensionRegistryOptions(tr.b.BASIC_REGISTRY_MODE); |
| tr.b.decorateExtensionRegistry(EventRegistry, options); |
| |
| // Enforce all options objects have the right fields. |
| EventRegistry.addEventListener('will-register', function(e) { |
| var metadata = e.typeInfo.metadata; |
| |
| if (metadata.name === undefined) |
| throw new Error('Registered events must provide name metadata'); |
| var i = tr.b.findFirstInArray( |
| EventRegistry.getAllRegisteredTypeInfos(), |
| function(x) { return x.metadata.name === metadata.name; }); |
| if (i !== undefined) |
| throw new Error('Event type with that name already registered'); |
| |
| if (metadata.pluralName === undefined) |
| throw new Error('Registered events must provide pluralName metadata'); |
| if (metadata.singleViewElementName === undefined) { |
| throw new Error('Registered events must provide ' + |
| 'singleViewElementName metadata'); |
| } |
| if (metadata.multiViewElementName === undefined) { |
| throw new Error('Registered events must provide ' + |
| 'multiViewElementName metadata'); |
| } |
| }); |
| |
| // Helper: lookup Events indexed by type name. |
| var eventsByTypeName = undefined; |
| EventRegistry.getEventTypeInfoByTypeName = function(typeName) { |
| if (eventsByTypeName === undefined) { |
| eventsByTypeName = {}; |
| EventRegistry.getAllRegisteredTypeInfos().forEach(function(typeInfo) { |
| eventsByTypeName[typeInfo.metadata.name] = typeInfo; |
| }); |
| } |
| return eventsByTypeName[typeName]; |
| } |
| |
| // Ensure eventsByTypeName stays current. |
| EventRegistry.addEventListener('registry-changed', function() { |
| eventsByTypeName = undefined; |
| }); |
| |
| function convertCamelCaseToTitleCase(name) { |
| var result = name.replace(/[A-Z]/g, ' $&'); |
| result = result.charAt(0).toUpperCase() + result.slice(1); |
| return result; |
| } |
| |
| EventRegistry.getUserFriendlySingularName = function(typeName) { |
| var typeInfo = EventRegistry.getEventTypeInfoByTypeName(typeName); |
| var str = typeInfo.metadata.name; |
| return convertCamelCaseToTitleCase(str); |
| }; |
| |
| EventRegistry.getUserFriendlyPluralName = function(typeName) { |
| var typeInfo = EventRegistry.getEventTypeInfoByTypeName(typeName); |
| var str = typeInfo.metadata.pluralName; |
| return convertCamelCaseToTitleCase(str); |
| }; |
| |
| return { |
| EventRegistry: EventRegistry |
| }; |
| }); |
| </script> |
