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MIT License. * * Reads a LDML XML keyboard file into JS object tree and resolves imports */ import { SchemaValidators, util } from '@keymanapp/common-types'; import { CommonTypesMessages } from '../../common-messages.js'; import { CompilerCallbacks } from "../../compiler-callbacks.js"; import { LDMLKeyboardXMLSourceFile, LKImport, ImportStatus } from './ldml-keyboard-xml.js'; import { constants } from '@keymanapp/ldml-keyboard-constants'; import { LDMLKeyboardTestDataXMLSourceFile, LKTTest, LKTTests } from './ldml-keyboard-testdata-xml.js'; import { KeymanXMLReader } from '@keymanapp/developer-utils'; import boxXmlArray = util.boxXmlArray; interface NameAndProps { '$'?: any; // content '#name'?: string; // element name '$$'?: any; // children }; export class LDMLKeyboardXMLSourceFileReaderOptions { /** path to the CLDR imports */ cldrImportsPath: string; /** ordered list of paths for local imports */ localImportsPaths: string[]; }; export class LDMLKeyboardXMLSourceFileReader { constructor(private options: LDMLKeyboardXMLSourceFileReaderOptions, private callbacks : CompilerCallbacks) { } static get defaultImportsURL(): [string,string] { return ['../import/', import.meta.url]; } readImportFile(version: string, subpath: string): Uint8Array { const importPath = this.callbacks.resolveFilename(this.options.cldrImportsPath, `${version}/${subpath}`); return this.callbacks.loadFile(importPath); } readLocalImportFile(path: string): Uint8Array { // try each of the local imports paths for (const localPath of this.options.localImportsPaths) { const importPath = this.callbacks.path.join(localPath, path); if(this.callbacks.fs.existsSync(importPath)) { return this.callbacks.loadFile(importPath); } } return null; // was not able to load from any of the paths } /** * xml2js will not place single-entry objects into arrays. * Easiest way to fix this is to box them ourselves as needed * @param source any * @returns true on success, false on failure */ private boxArrays(source: any) : boolean { if (source?.keyboard3) { if (!source.keyboard3.keys) { // Note: this is here to put a substrate for the imported keys source.keyboard3.keys = { key: [], }; } if (!source.keyboard3.keys.import) { source.keyboard3.keys.import = []; } if (!source.keyboard3.forms) { source.keyboard3.forms = { form: [], }; } if (!source.keyboard3.forms.import) { source.keyboard3.forms.import = []; } } boxXmlArray(source?.keyboard3, 'layers'); boxXmlArray(source?.keyboard3?.displays, 'display'); boxXmlArray(source?.keyboard3?.keys, 'key'); boxXmlArray(source?.keyboard3?.flicks, 'flick'); boxXmlArray(source?.keyboard3?.locales, 'locale'); boxXmlArray(source?.keyboard3, 'transforms'); if(source?.keyboard3?.layers) { for(const layers of source?.keyboard3?.layers) { boxXmlArray(layers, 'layer'); if(layers?.layer) { for(const layer of layers?.layer) { boxXmlArray(layer, 'row'); } } } } if(source?.keyboard3?.forms?.form) { boxXmlArray(source?.keyboard3?.forms, 'form'); for(const form of source?.keyboard3?.forms?.form) { boxXmlArray(form, 'scanCodes'); } } if(source?.keyboard3?.flicks) { boxXmlArray(source?.keyboard3?.flicks, 'flick'); for(const flick of source?.keyboard3?.flicks?.flick) { boxXmlArray(flick, 'flickSegment'); } } if(source?.keyboard3?.variables) { boxXmlArray(source?.keyboard3?.variables, 'set'); boxXmlArray(source?.keyboard3?.variables, 'string'); boxXmlArray(source?.keyboard3?.variables, 'uset'); } if(source?.keyboard3?.transforms) { for(const transforms of source.keyboard3.transforms) { boxXmlArray(transforms, 'transformGroup'); // need to see if there's an empty ('') element. // the schema allows an empty object, but the spec doesn't. for (let i=0; i<transforms.transformGroup.length; i++) { if (transforms.transformGroup[i] === '') { // substitute empty object. the compiler will complain about it. transforms.transformGroup[i] = { }; } } for (const transformGroup of transforms.transformGroup) { boxXmlArray(transformGroup, 'transform'); boxXmlArray(transformGroup, 'reorder'); } } } return this.boxImportsAndSpecials(source, 'keyboard3'); } /** * Recurse over object, boxing up any specials or imports * @param obj any object to be traversed * @param subtag the leafmost enclosing tag such as 'keyboard3' * @returns true on success, false on failure */ private boxImportsAndSpecials(obj: any, subtag: string) : boolean { if (!obj) return true; if (Array.isArray(obj)) { for (const sub of obj) { // retain the same subtag if (!this.boxImportsAndSpecials(sub, subtag)) { // resolveImports has already logged a message return false; } } } else if(typeof obj === 'object') { for (const key of Object.keys(obj)) { if (key === 'special') { boxXmlArray(obj, key); } else if(key === 'import') { // Need to 'box it up' first for processing boxXmlArray(obj, key); // Now, resolve the import if (!this.resolveImports(obj, subtag)) { // resolveImports has already logged a message return false; } // now delete the import array we so carefully constructed, the caller does not // want to see it. delete obj['import']; } else { if (!this.boxImportsAndSpecials(obj[key], key)) { // resolveImports has already logged a message return false; } } } } return true; } /** * * @param obj object to be imported into * @param subtag obj's element tag, e.g. `keys` * @returns true on success, false on failure */ private resolveImports(obj: any, subtag: string) : boolean { // These are in reverse order, because the imports insert at the beginning of the array. // first, the explicit imports for (const asImport of ([...obj['import'] as LKImport[]].reverse())) { if (!this.resolveOneImport(obj, subtag, asImport)) { // resolveOneImport has already logged a message return false; } } // then, the implied imports if (subtag === 'keys') { // <import base="cldr" path="45/keys-Latn-implied.xml"/> if (!this.resolveOneImport(obj, subtag, { base: constants.cldr_import_base, path: constants.cldr_implied_keys_import }, true)) { // resolveOneImport has already logged a message return false; } } else if (subtag === 'forms') { // <import base="cldr" path="45/scanCodes-implied.xml"/> if (!this.resolveOneImport(obj, subtag, { base: constants.cldr_import_base, path: constants.cldr_implied_forms_import }, true)) { // resolveOneImport has already logged a message return false; } } return true; } /** * @param obj the object being imported into * @param subtag obj's element tag, e.g. `keys` * @param asImport the import structure * @param implied true if it is an implied import * @returns true on success, false on failure */ private resolveOneImport(obj: any, subtag: string, asImport: LKImport, implied? : boolean) : boolean { const { base, path } = asImport; // If base is not an empty string (or null/undefined), then it must be 'cldr' if (base && base !== constants.cldr_import_base) { this.callbacks.reportMessage(CommonTypesMessages.Error_ImportInvalidBase({base, path, subtag})); return false; } let importData: Uint8Array; if (base === constants.cldr_import_base) { // CLDR import const paths = path.split('/'); if (paths[0] == '' || paths[1] == '' || paths.length !== 2) { this.callbacks.reportMessage(CommonTypesMessages.Error_ImportInvalidPath({base, path, subtag})); return false; } if (constants.treatAsLatest(paths[0])) { /** There's no data or DTD change in 45, 46, 46.1, 47 so map them all to 46 at present. */ paths[0] = constants.cldr_version_latest; } importData = this.readImportFile(paths[0], paths[1]); } else { // local import importData = this.readLocalImportFile(path); } if (!importData || !importData.length) { this.callbacks.reportMessage(CommonTypesMessages.Error_ImportReadFail({base, path, subtag})); return false; } const importXml: any = this.loadUnboxed(importData); // TODO-LDML: have to load as any because it is an arbitrary part const importRootNode = importXml[subtag]; // e.g. <keys/> // importXml will have one property: the root element. if (!importRootNode) { this.callbacks.reportMessage(CommonTypesMessages.Error_ImportWrongRoot({base, path, subtag})); return false; } // pull all children of importXml[subtag] into obj for (const subsubtag of Object.keys(importRootNode).reverse()) { // e.g. <key/> const subsubval = importRootNode[subsubtag]; const basePath = `${base}/${path}`; if (!Array.isArray(subsubval)) { // This is somewhat of an internal error, indicating that a non-mergeable XML file was imported // Not exercisable with the standard LDML imports. this.callbacks.reportMessage(CommonTypesMessages.Error_ImportMergeFail({base, path, subtag, subsubtag})); return false; } // Mark all children as an import subsubval.forEach(o => o[ImportStatus.import] = basePath); if (implied) { // mark all children as an implied import subsubval.forEach(o => o[ImportStatus.impliedImport] = basePath); } if (base !== constants.cldr_import_base) { subsubval.forEach(o => o[ImportStatus.localImport] = path); } if (!obj[subsubtag]) { obj[subsubtag] = []; // start with empty array } obj[subsubtag] = [...subsubval, ...obj[subsubtag]]; } return true; } /** * @returns true if valid, false if invalid */ public validate(source: LDMLKeyboardXMLSourceFile | LDMLKeyboardTestDataXMLSourceFile): boolean { if(!SchemaValidators.default.ldmlKeyboard3(source)) { for (const err of (<any>SchemaValidators.default.ldmlKeyboard3).errors) { this.callbacks.reportMessage(CommonTypesMessages.Error_SchemaValidationError({ instancePath: err.instancePath, keyword: err.keyword, message: err.message || 'Unknown AJV Error', // docs say 'message' is optional if 'messages:false' in options params: Object.entries(err.params || {}).sort().map(([k,v])=>`${k}="${v}"`).join(' '), })); } return false; } return true; } loadUnboxed(file: Uint8Array): LDMLKeyboardXMLSourceFile { const data = new TextDecoder().decode(file); const source = new KeymanXMLReader('keyboard3') .parse(data) as LDMLKeyboardXMLSourceFile; return source; } /** * @param file * @returns source on success, otherwise null */ public load(file: Uint8Array): LDMLKeyboardXMLSourceFile | null { if (!file) { throw new Error(`file parameter must not be null`); } let source: LDMLKeyboardXMLSourceFile = null; try { source = this.loadUnboxed(file); } catch(e) { this.callbacks.reportMessage(CommonTypesMessages.Error_InvalidXml({e})); return null; } if (this.boxArrays(source)) { return source; } // boxArrays ... resolveImports has already logged a message return null; } loadTestDataUnboxed(file: Uint8Array): any { const source = new KeymanXMLReader('keyboardTest3') .parse(new TextDecoder().decode(file)) as any; return source; } /** * Filter the obj array for a subtag * @param source array of source objs * @param subtag subtag to filter on * @returns */ findSubtagArray(source: NameAndProps[], subtag: string): NameAndProps[] { return source?.filter(o => o['#name'] === subtag); } /** * Get exactly one element * @param source * @param subtag * @returns */ findSubtag(source: NameAndProps[], subtag: string): NameAndProps | null { const r = this.findSubtagArray(source, subtag); if (!r || r.length === 0) { return null; } else if (r.length === 1) { return r[0]; } else { this.callbacks.reportMessage(CommonTypesMessages.Error_TestDataUnexpectedArray({subtag})); return null; // ERROR } } /** * The default test data stuffer. * Just gets $ (the attrs) as the body. * Override to use something more complex, such as including child nodes. * @param o object to map * @param r back ref to reader */ static readonly defaultMapper = ((o : NameAndProps, r: LDMLKeyboardXMLSourceFileReader) => o?.$); /** * * @param obj target object * @param source array of $/#name strings * @param subtag name to extract * @param mapper custom mapper function */ stuffBoxes(obj: any, source: NameAndProps[], subtag: string, asArray?: boolean, mapper?: (v: NameAndProps, r: LDMLKeyboardXMLSourceFileReader) => any) { if (!mapper) { mapper = LDMLKeyboardXMLSourceFileReader.defaultMapper; } if (asArray) { const r = this; obj[subtag] = this.findSubtagArray(source, subtag)?.map((v) => mapper(v, r)); // extract contents only } else { obj[subtag] = mapper(this.findSubtag(source, subtag), this); // run the mapper once } } boxTestDataArrays(raw: any) : LDMLKeyboardTestDataXMLSourceFile | null { if (!raw) return null; const a : LDMLKeyboardTestDataXMLSourceFile = { keyboardTest3: { conformsTo: raw?.keyboardTest3?.$?.conformsTo, } }; const $$ : NameAndProps[] = raw?.keyboardTest3?.$$; this.stuffBoxes(a.keyboardTest3, $$, 'info'); this.stuffBoxes(a.keyboardTest3, $$, 'repertoire', true); this.stuffBoxes(a.keyboardTest3, $$, 'tests', true, (o, r) => { // start with basic unpack const tests : LKTTests = LDMLKeyboardXMLSourceFileReader.defaultMapper(o, r); // add ingredients r.stuffBoxes(tests, o.$$, 'test', true, (o, r) => { // start with basic unpack const test : LKTTest = LDMLKeyboardXMLSourceFileReader.defaultMapper(o, r); // add ingredients const $$ : NameAndProps[] = o.$$; r.stuffBoxes(test, $$, 'startContext'); // singleton // now the actions test.actions = $$.map(v => { const type = v['#name']; // element name if (type === 'startContext') { return null; // handled above } const subv = LDMLKeyboardXMLSourceFileReader.defaultMapper(v, r); return Object.assign({ type }, subv); }).filter(v => v !== null); return test; }); return tests; }); return a; } /** * @param file test file * @returns source on success, otherwise null */ public loadTestData(file: Uint8Array): LDMLKeyboardTestDataXMLSourceFile | null { if (!file) { return null; } const source = this.loadTestDataUnboxed(file); return this.boxTestDataArrays(source); } } |