mirror of
https://github.com/NativeScript/NativeScript.git
synced 2025-08-14 18:12:09 +08:00
749 lines
24 KiB
TypeScript
749 lines
24 KiB
TypeScript
// Definitions.
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import { View, Template, KeyedTemplate } from '../core/view';
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import { ViewBase } from '../core/view-base';
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import { ViewEntry } from '../frame';
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import { Page } from '../page';
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// Types.
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import { debug, ScopeError, SourceError, Source } from '../../utils/debug';
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import * as xml from '../../xml';
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import { isString, isObject, isDefined } from '../../utils/types';
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import { setPropertyValue, getComponentModule } from './component-builder';
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import type { ComponentModule } from './component-builder';
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import { platformNames, Device } from '../../platform';
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import { profile } from '../../profiling';
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import { sanitizeModuleName } from './module-name-sanitizer';
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import { resolveModuleName } from '../../module-name-resolver';
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const ios = platformNames.ios.toLowerCase();
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const android = platformNames.android.toLowerCase();
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const defaultNameSpaceMatcher = /tns\.xsd$/i;
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export interface LoadOptions {
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path: string;
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name: string;
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attributes?: any;
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exports?: any;
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page?: Page;
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}
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export class Builder {
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// ui plugin developers can add to these to define their own custom types if needed
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static knownTemplates: Set<string> = new Set(['itemTemplate']);
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static knownMultiTemplates: Set<string> = new Set(['itemTemplates']);
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static knownCollections: Set<string> = new Set(['items', 'spans', 'actionItems']);
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static createViewFromEntry(entry: ViewEntry): View {
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if (entry.create) {
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const view = entry.create();
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if (!view) {
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throw new Error('Failed to create View with entry.create() function.');
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}
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return view;
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} else if (entry.moduleName) {
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const moduleName = sanitizeModuleName(entry.moduleName);
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const resolvedCodeModuleName = resolveModuleName(moduleName, ''); //`${moduleName}.xml`;
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let moduleExports = resolvedCodeModuleName ? global.loadModule(resolvedCodeModuleName, true) : null;
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if (moduleExports && moduleExports.createPage) {
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// Exports has a createPage() method
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const view = moduleExports.createPage();
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const resolvedCssModuleName = resolveModuleName(moduleName, 'css'); //entry.moduleName + ".css";
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if (resolvedCssModuleName) {
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view.addCssFile(resolvedCssModuleName);
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}
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return view;
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} else {
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const componentModule = loadInternal(moduleName, moduleExports);
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const componentView = componentModule && componentModule.component;
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return componentView;
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}
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}
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throw new Error('Failed to load page XML file for module: ' + entry.moduleName);
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}
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static parse(value: string | Template, context?: any): View {
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if (typeof value === 'function') {
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return (<Template>value)();
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} else {
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const exports = context ? getExports(context) : undefined;
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const componentModule = parseInternal(value, exports);
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return componentModule && componentModule.component;
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}
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}
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static load(pathOrOptions: string | LoadOptions, context?: any): View {
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let componentModule: ComponentModule;
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if (typeof pathOrOptions === 'string') {
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const moduleName = sanitizeModuleName(pathOrOptions);
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componentModule = loadInternal(moduleName, context);
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} else {
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componentModule = loadCustomComponent(pathOrOptions.path, pathOrOptions.name, pathOrOptions.attributes, pathOrOptions.exports, pathOrOptions.page, true);
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}
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return componentModule && componentModule.component;
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}
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static parseMultipleTemplates(value: string, context: any): Array<KeyedTemplate> {
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const dummyComponent = `<ListView><ListView.itemTemplates>${value}</ListView.itemTemplates></ListView>`;
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return parseInternal(dummyComponent, context).component['itemTemplates'];
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}
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}
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export function parse(value: string | Template, context?: any): View {
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console.log('parse() is deprecated. Use Builder.parse() instead.');
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return Builder.parse(value, context);
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}
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export function parseMultipleTemplates(value: string, context: any): Array<KeyedTemplate> {
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console.log('parseMultipleTemplates() is deprecated. Use Builder.parseMultipleTemplates() instead.');
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return Builder.parseMultipleTemplates(value, context);
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}
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export function load(pathOrOptions: string | LoadOptions, context?: any): View {
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console.log('load() is deprecated. Use Builder.load() instead.');
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return Builder.load(pathOrOptions, context);
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}
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export function createViewFromEntry(entry: ViewEntry): View {
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console.log('createViewFromEntry() is deprecated. Use Builder.createViewFromEntry() instead.');
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return Builder.createViewFromEntry(entry);
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}
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function loadInternal(moduleName: string, moduleExports: any): ComponentModule {
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let componentModule: ComponentModule;
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const resolvedXmlModule = resolveModuleName(moduleName, 'xml');
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if (resolvedXmlModule) {
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const text = global.loadModule(resolvedXmlModule, true);
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componentModule = parseInternal(text, moduleExports, resolvedXmlModule, moduleName);
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}
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const componentView = componentModule && componentModule.component;
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if (componentView) {
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// Save exports to root component (will be used for templates).
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(<any>componentView).exports = moduleExports;
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// Save _moduleName - used for livesync
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componentView._moduleName = moduleName;
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}
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if (!componentModule) {
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throw new Error('Failed to load component from module: ' + moduleName);
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}
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return componentModule;
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}
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function loadCustomComponent(componentNamespace: string, componentName?: string, attributes?: Object, context?: Object, parentPage?: View, isRootComponent: boolean = true, moduleNamePath?: string): ComponentModule {
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if (!parentPage && context) {
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// Read the parent page that was passed down below
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// https://github.com/NativeScript/NativeScript/issues/1639
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parentPage = context['_parentPage'];
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delete context['_parentPage'];
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}
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let result: ComponentModule;
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componentNamespace = sanitizeModuleName(componentNamespace);
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const moduleName = `${componentNamespace}/${componentName}`;
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const resolvedCodeModuleName = resolveModuleName(moduleName, '');
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const resolvedXmlModuleName = resolveModuleName(moduleName, 'xml');
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let resolvedCssModuleName = resolveModuleName(moduleName, 'css');
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if (resolvedXmlModuleName) {
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// Custom components with XML
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let subExports = context;
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if (resolvedCodeModuleName) {
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// Component has registered code module.
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subExports = global.loadModule(resolvedCodeModuleName, true);
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}
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// Pass the parent page down the chain in case of custom components nested on many levels. Use the context for piggybacking.
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// https://github.com/NativeScript/NativeScript/issues/1639
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if (!subExports) {
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subExports = {};
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}
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subExports['_parentPage'] = parentPage;
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result = loadInternal(moduleName, subExports);
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// Attributes will be transferred to the custom component
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if (isDefined(result) && isDefined(result.component) && isDefined(attributes)) {
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for (let attr in attributes) {
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setPropertyValue(result.component, subExports, context, attr, attributes[attr]);
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}
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}
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} else {
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// Custom components without XML
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result = getComponentModule(componentName, componentNamespace, attributes, context, moduleNamePath, isRootComponent);
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// The namespace is the JS module and the (componentName is the name of the class in the module)
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// So if there is no componentNamespace/componentName.{qualifiers}.css we should also look for
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// componentNamespace.{qualifiers}.css
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if (!resolvedCssModuleName) {
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resolvedCssModuleName = resolveModuleName(componentNamespace, 'css');
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}
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}
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// Add CSS from webpack module if exists.
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if (parentPage && resolvedCssModuleName) {
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parentPage.addCssFile(resolvedCssModuleName);
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}
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return result;
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}
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function getExports(instance: ViewBase): any {
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const isView = !!instance._domId;
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if (!isView) {
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return (<any>instance).exports || instance;
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}
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let exportObject = (<any>instance).exports;
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let parent = instance.parent;
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while (exportObject === undefined && parent) {
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exportObject = (<any>parent).exports;
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parent = parent.parent;
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}
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return exportObject;
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}
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function parseInternal(value: string, context: any, xmlModule?: string, moduleName?: string): ComponentModule {
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let start: xml2ui.XmlStringParser;
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let ui: xml2ui.ComponentParser;
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const errorFormat = debug && xmlModule ? xml2ui.SourceErrorFormat(xmlModule) : xml2ui.PositionErrorFormat;
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const componentSourceTracker =
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debug && xmlModule
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? xml2ui.ComponentSourceTracker(xmlModule)
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: () => {
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// no-op
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};
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(start = new xml2ui.XmlStringParser(errorFormat)).pipe(new xml2ui.PlatformFilter()).pipe(new xml2ui.XmlStateParser((ui = new xml2ui.ComponentParser(context, errorFormat, componentSourceTracker, moduleName))));
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start.parse(value);
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return ui.rootComponentModule;
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}
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namespace xml2ui {
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/**
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* Pipes and filters:
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* https://en.wikipedia.org/wiki/Pipeline_(software)
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*/
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interface XmlProducer {
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pipe<Next extends XmlConsumer>(next: Next): Next;
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}
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interface XmlConsumer {
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parse(args: xml.ParserEvent);
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}
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interface ParseInputData extends String {
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default?: string;
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}
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export class XmlProducerBase implements XmlProducer {
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private _next: XmlConsumer;
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public pipe<Next extends XmlConsumer>(next: Next) {
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this._next = next;
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return next;
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}
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protected next(args: xml.ParserEvent) {
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this._next.parse(args);
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}
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}
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export class XmlStringParser extends XmlProducerBase implements XmlProducer {
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private error: ErrorFormatter;
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constructor(error?: ErrorFormatter) {
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super();
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this.error = error || PositionErrorFormat;
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}
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public parse(value: ParseInputData) {
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const xmlParser = new xml.XmlParser(
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(args: xml.ParserEvent) => {
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try {
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this.next(args);
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} catch (e) {
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throw this.error(e, args.position);
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}
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},
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(e, p) => {
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throw this.error(e, p);
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},
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true
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);
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if (isString(value)) {
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xmlParser.parse(<string>value);
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} else if (isObject(value) && isString(value.default)) {
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xmlParser.parse(value.default);
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}
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}
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}
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interface ErrorFormatter {
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(e: Error, p: xml.Position): Error;
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}
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export function PositionErrorFormat(e: Error, p: xml.Position): Error {
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return new ScopeError(e, 'Parsing XML at ' + p.line + ':' + p.column);
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}
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export function SourceErrorFormat(uri): ErrorFormatter {
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return (e: Error, p: xml.Position) => {
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const source = p ? new Source(uri, p.line, p.column) : new Source(uri, -1, -1);
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e = new SourceError(e, source, 'Building UI from XML.');
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return e;
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};
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}
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interface SourceTracker {
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(component: any, p: xml.Position): void;
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}
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export function ComponentSourceTracker(uri): SourceTracker {
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return (component: any, p: xml.Position) => {
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if (!Source.get(component)) {
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const source = p ? new Source(uri, p.line, p.column) : new Source(uri, -1, -1);
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Source.set(component, source);
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}
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};
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}
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export class PlatformFilter extends XmlProducerBase implements XmlProducer, XmlConsumer {
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private currentPlatformContext: string;
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public parse(args: xml.ParserEvent) {
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if (args.eventType === xml.ParserEventType.StartElement) {
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if (PlatformFilter.isPlatform(args.elementName)) {
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if (this.currentPlatformContext) {
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throw new Error("Already in '" + this.currentPlatformContext + "' platform context and cannot switch to '" + args.elementName + "' platform! Platform tags cannot be nested.");
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}
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this.currentPlatformContext = args.elementName;
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return;
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}
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}
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if (args.eventType === xml.ParserEventType.EndElement) {
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if (PlatformFilter.isPlatform(args.elementName)) {
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this.currentPlatformContext = undefined;
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return;
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}
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}
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if (this.currentPlatformContext && !PlatformFilter.isCurentPlatform(this.currentPlatformContext)) {
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return;
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}
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this.next(args);
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}
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private static isPlatform(value: string): boolean {
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if (value) {
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const toLower = value.toLowerCase();
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return toLower === android || toLower === ios;
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}
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return false;
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}
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private static isCurentPlatform(value: string): boolean {
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return value && value.toLowerCase() === Device.os.toLowerCase();
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}
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}
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export class XmlArgsReplay extends XmlProducerBase implements XmlProducer {
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private error: ErrorFormatter;
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private args: xml.ParserEvent[];
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constructor(args: xml.ParserEvent[], errorFormat: ErrorFormatter) {
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super();
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this.args = args;
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this.error = errorFormat;
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}
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public replay() {
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this.args.forEach((args: xml.ParserEvent) => {
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try {
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this.next(args);
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} catch (e) {
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throw this.error(e, args.position);
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}
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});
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}
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}
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interface TemplateProperty {
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context?: any;
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parent: ComponentModule;
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name: string;
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elementName: string;
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templateItems: Array<string>;
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errorFormat: ErrorFormatter;
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sourceTracker: SourceTracker;
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}
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/**
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* It is a state pattern
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* https://en.wikipedia.org/wiki/State_pattern
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*/
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export class XmlStateParser implements XmlConsumer {
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private state: XmlStateConsumer;
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constructor(state: XmlStateConsumer) {
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this.state = state;
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}
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parse(args: xml.ParserEvent) {
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this.state = this.state.parse(args);
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}
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}
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interface XmlStateConsumer extends XmlConsumer {
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parse(args: xml.ParserEvent): XmlStateConsumer;
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}
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export class TemplateParser implements XmlStateConsumer {
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private _context: any;
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private _recordedXmlStream: Array<xml.ParserEvent>;
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private _templateProperty: TemplateProperty;
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private _nestingLevel: number;
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private _state: TemplateParser.State;
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private parent: XmlStateConsumer;
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private _setTemplateProperty: boolean;
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constructor(parent: XmlStateConsumer, templateProperty: TemplateProperty, setTemplateProperty = true) {
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this.parent = parent;
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this._context = templateProperty.context;
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this._recordedXmlStream = new Array<xml.ParserEvent>();
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this._templateProperty = templateProperty;
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this._nestingLevel = 0;
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this._state = TemplateParser.State.EXPECTING_START;
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this._setTemplateProperty = setTemplateProperty;
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}
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public parse(args: xml.ParserEvent): XmlStateConsumer {
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if (args.eventType === xml.ParserEventType.StartElement) {
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this.parseStartElement(args.prefix, args.namespace, args.elementName, args.attributes);
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} else if (args.eventType === xml.ParserEventType.EndElement) {
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this.parseEndElement(args.prefix, args.elementName);
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}
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this._recordedXmlStream.push(args);
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return this._state === TemplateParser.State.FINISHED ? this.parent : this;
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}
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public get elementName(): string {
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return this._templateProperty.elementName;
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}
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private parseStartElement(prefix: string, namespace: string, elementName: string, attributes: Object) {
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if (this._state === TemplateParser.State.EXPECTING_START) {
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this._state = TemplateParser.State.PARSING;
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} else if (this._state === TemplateParser.State.FINISHED) {
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throw new Error('Template must have exactly one root element but multiple elements were found.');
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}
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this._nestingLevel++;
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}
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private parseEndElement(prefix: string, elementName: string) {
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if (this._state === TemplateParser.State.EXPECTING_START) {
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throw new Error('Template must have exactly one root element but none was found.');
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} else if (this._state === TemplateParser.State.FINISHED) {
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throw new Error('No more closing elements expected for this template.');
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}
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this._nestingLevel--;
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if (this._nestingLevel === 0) {
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this._state = TemplateParser.State.FINISHED;
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if (this._setTemplateProperty && this._templateProperty.name in this._templateProperty.parent.component) {
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let template = this.buildTemplate();
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this._templateProperty.parent.component[this._templateProperty.name] = template;
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}
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}
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}
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public buildTemplate(): Template {
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const context = this._context;
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const errorFormat = this._templateProperty.errorFormat;
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const sourceTracker = this._templateProperty.sourceTracker;
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const template: Template = <Template>profile('Template()', () => {
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let start: xml2ui.XmlArgsReplay;
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let ui: xml2ui.ComponentParser;
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(start = new xml2ui.XmlArgsReplay(this._recordedXmlStream, errorFormat))
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// No platform filter, it has been filtered already
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.pipe(new XmlStateParser((ui = new ComponentParser(context, errorFormat, sourceTracker))));
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start.replay();
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return ui.rootComponentModule.component;
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});
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return template;
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}
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}
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export class MultiTemplateParser implements XmlStateConsumer {
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private _childParsers = new Array<TemplateParser>();
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private _value: KeyedTemplate[];
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get value(): KeyedTemplate[] {
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return this._value;
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}
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constructor(private parent: XmlStateConsumer, private templateProperty: TemplateProperty) {}
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public parse(args: xml.ParserEvent): XmlStateConsumer {
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if (args.eventType === xml.ParserEventType.StartElement && args.elementName === 'template') {
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let childParser = new TemplateParser(this, this.templateProperty, false);
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childParser['key'] = args.attributes['key'];
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this._childParsers.push(childParser);
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return childParser;
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}
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if (args.eventType === xml.ParserEventType.EndElement) {
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let name = ComponentParser.getComplexPropertyName(args.elementName);
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if (name === this.templateProperty.name) {
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let templates = new Array<KeyedTemplate>();
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for (let i = 0; i < this._childParsers.length; i++) {
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templates.push({
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|
key: this._childParsers[i]['key'],
|
|
createView: this._childParsers[i].buildTemplate(),
|
|
});
|
|
}
|
|
this._value = templates;
|
|
|
|
return this.parent.parse(args);
|
|
}
|
|
}
|
|
|
|
return this;
|
|
}
|
|
}
|
|
|
|
export namespace TemplateParser {
|
|
export const enum State {
|
|
EXPECTING_START,
|
|
PARSING,
|
|
FINISHED,
|
|
}
|
|
}
|
|
|
|
export class ComponentParser implements XmlStateConsumer {
|
|
private static KNOWNCOLLECTIONS = 'knownCollections';
|
|
private static KNOWNTEMPLATES = 'knownTemplates';
|
|
private static KNOWNMULTITEMPLATES = 'knownMultiTemplates';
|
|
|
|
public rootComponentModule: ComponentModule;
|
|
|
|
private context: any;
|
|
|
|
private currentRootView: View;
|
|
private parents = new Array<ComponentModule>();
|
|
private complexProperties = new Array<ComponentParser.ComplexProperty>();
|
|
|
|
private error: ErrorFormatter;
|
|
private sourceTracker: SourceTracker;
|
|
|
|
constructor(context: any, errorFormat: ErrorFormatter, sourceTracker: SourceTracker, private moduleName?: string) {
|
|
this.context = context;
|
|
this.error = errorFormat;
|
|
this.sourceTracker = sourceTracker;
|
|
}
|
|
|
|
@profile
|
|
private buildComponent(args: xml.ParserEvent): ComponentModule {
|
|
if (args.prefix && args.namespace) {
|
|
// Custom components
|
|
return loadCustomComponent(args.namespace, args.elementName, args.attributes, this.context, this.currentRootView, !this.currentRootView, this.moduleName);
|
|
} else {
|
|
// Default components
|
|
let namespace = args.namespace;
|
|
if (defaultNameSpaceMatcher.test(namespace || '')) {
|
|
//Ignore the default ...tns.xsd namespace URL
|
|
namespace = undefined;
|
|
}
|
|
|
|
return getComponentModule(args.elementName, namespace, args.attributes, this.context, this.moduleName, !this.currentRootView);
|
|
}
|
|
}
|
|
|
|
public parse(args: xml.ParserEvent): XmlStateConsumer {
|
|
// Get the current parent.
|
|
const parent = this.parents[this.parents.length - 1];
|
|
const complexProperty = this.complexProperties[this.complexProperties.length - 1];
|
|
|
|
// Create component instance from every element declaration.
|
|
if (args.eventType === xml.ParserEventType.StartElement) {
|
|
if (ComponentParser.isComplexProperty(args.elementName)) {
|
|
const name = ComponentParser.getComplexPropertyName(args.elementName);
|
|
|
|
const complexProperty: ComponentParser.ComplexProperty = {
|
|
parent: parent,
|
|
name: name,
|
|
items: [],
|
|
};
|
|
this.complexProperties.push(complexProperty);
|
|
|
|
if (ComponentParser.isKnownTemplate(name, parent.exports)) {
|
|
return new TemplateParser(this, {
|
|
context: (parent ? getExports(parent.component) : null) || this.context, // Passing 'context' won't work if you set "codeFile" on the page
|
|
parent: parent,
|
|
name: name,
|
|
elementName: args.elementName,
|
|
templateItems: [],
|
|
errorFormat: this.error,
|
|
sourceTracker: this.sourceTracker,
|
|
});
|
|
}
|
|
|
|
if (ComponentParser.isKnownMultiTemplate(name, parent.exports)) {
|
|
const parser = new MultiTemplateParser(this, {
|
|
context: (parent ? getExports(parent.component) : null) || this.context, // Passing 'context' won't work if you set "codeFile" on the page
|
|
parent: parent,
|
|
name: name,
|
|
elementName: args.elementName,
|
|
templateItems: [],
|
|
errorFormat: this.error,
|
|
sourceTracker: this.sourceTracker,
|
|
});
|
|
complexProperty.parser = parser;
|
|
|
|
return parser;
|
|
}
|
|
} else {
|
|
const componentModule = this.buildComponent(args);
|
|
|
|
if (componentModule) {
|
|
this.sourceTracker(componentModule.component, args.position);
|
|
if (parent) {
|
|
if (complexProperty) {
|
|
// Add component to complex property of parent component.
|
|
ComponentParser.addToComplexProperty(parent, complexProperty, componentModule);
|
|
} else if ((<any>parent.component)._addChildFromBuilder) {
|
|
(<any>parent.component)._addChildFromBuilder(args.elementName, componentModule.component);
|
|
}
|
|
} else if (this.parents.length === 0) {
|
|
// Set root component.
|
|
this.rootComponentModule = componentModule;
|
|
|
|
if (this.rootComponentModule) {
|
|
this.currentRootView = this.rootComponentModule.component;
|
|
|
|
if ((<any>this.currentRootView).exports) {
|
|
this.context = (<any>this.currentRootView).exports;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add the component instance to the parents scope collection.
|
|
this.parents.push(componentModule);
|
|
}
|
|
}
|
|
} else if (args.eventType === xml.ParserEventType.EndElement) {
|
|
if (ComponentParser.isComplexProperty(args.elementName)) {
|
|
if (complexProperty) {
|
|
if (complexProperty.parser) {
|
|
parent.component[complexProperty.name] = complexProperty.parser.value;
|
|
} else if (parent && (<any>parent.component)._addArrayFromBuilder) {
|
|
// If parent is AddArrayFromBuilder call the interface method to populate the array property.
|
|
(<any>parent.component)._addArrayFromBuilder(complexProperty.name, complexProperty.items);
|
|
complexProperty.items = [];
|
|
}
|
|
}
|
|
// Remove the last complexProperty from the complexProperties collection (move to the previous complexProperty scope).
|
|
this.complexProperties.pop();
|
|
} else {
|
|
// Remove the last parent from the parents collection (move to the previous parent scope).
|
|
this.parents.pop();
|
|
}
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
private static isComplexProperty(name: string): boolean {
|
|
return isString(name) && name.indexOf('.') !== -1;
|
|
}
|
|
|
|
public static getComplexPropertyName(fullName: string): string {
|
|
let name: string;
|
|
|
|
if (isString(fullName)) {
|
|
const names = fullName.split('.');
|
|
name = names[names.length - 1];
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
private static isKnownTemplate(name: string, exports: any): boolean {
|
|
return Builder.knownTemplates.has(name);
|
|
}
|
|
|
|
private static isKnownMultiTemplate(name: string, exports: any): boolean {
|
|
return Builder.knownMultiTemplates.has(name);
|
|
}
|
|
|
|
private static addToComplexProperty(parent: ComponentModule, complexProperty: ComponentParser.ComplexProperty, elementModule: ComponentModule) {
|
|
// If property name is known collection we populate array with elements.
|
|
const parentComponent = <any>parent.component;
|
|
if (ComponentParser.isKnownCollection(complexProperty.name, parent.exports)) {
|
|
complexProperty.items.push(elementModule.component);
|
|
} else if (parentComponent._addChildFromBuilder) {
|
|
parentComponent._addChildFromBuilder(complexProperty.name, elementModule.component);
|
|
} else {
|
|
// Or simply assign the value;
|
|
parentComponent[complexProperty.name] = elementModule.component;
|
|
}
|
|
}
|
|
|
|
private static isKnownCollection(name: string, context: any): boolean {
|
|
return Builder.knownCollections.has(name);
|
|
}
|
|
}
|
|
|
|
export namespace ComponentParser {
|
|
export interface ComplexProperty {
|
|
parent: ComponentModule;
|
|
name: string;
|
|
items?: Array<any>;
|
|
parser?: { value: any };
|
|
}
|
|
}
|
|
}
|