75 lines
2.7 KiB
TypeScript
75 lines
2.7 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import * as i18n from '../../../i18n/i18n_ast';
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import {mapLiteral} from '../../../output/map_util';
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import * as o from '../../../output/output_ast';
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import {serializeIcuNode} from './icu_serializer';
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import {i18nMetaToDocStmt, metaFromI18nMessage} from './meta';
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import {formatI18nPlaceholderName} from './util';
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/** Closure uses `goog.getMsg(message)` to lookup translations */
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const GOOG_GET_MSG = 'goog.getMsg';
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export function createGoogleGetMsgStatements(
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variable: o.ReadVarExpr, message: i18n.Message, closureVar: o.ReadVarExpr,
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params: {[name: string]: o.Expression}): o.Statement[] {
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const messageString = serializeI18nMessageForGetMsg(message);
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const args = [o.literal(messageString) as o.Expression];
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if (Object.keys(params).length) {
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args.push(mapLiteral(params, true));
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}
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// /** Description and meaning of message */
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// const MSG_... = goog.getMsg(..);
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// I18N_X = MSG_...;
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const statements = [];
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const jsdocComment = i18nMetaToDocStmt(metaFromI18nMessage(message));
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if (jsdocComment !== null) {
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statements.push(jsdocComment);
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}
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statements.push(closureVar.set(o.variable(GOOG_GET_MSG).callFn(args)).toConstDecl());
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statements.push(new o.ExpressionStatement(variable.set(closureVar)));
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return statements;
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}
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/**
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* This visitor walks over i18n tree and generates its string representation, including ICUs and
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* placeholders in `{$placeholder}` (for plain messages) or `{PLACEHOLDER}` (inside ICUs) format.
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*/
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class GetMsgSerializerVisitor implements i18n.Visitor {
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private formatPh(value: string): string { return `{$${formatI18nPlaceholderName(value)}}`; }
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visitText(text: i18n.Text): any { return text.value; }
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visitContainer(container: i18n.Container): any {
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return container.children.map(child => child.visit(this)).join('');
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}
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visitIcu(icu: i18n.Icu): any { return serializeIcuNode(icu); }
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visitTagPlaceholder(ph: i18n.TagPlaceholder): any {
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return ph.isVoid ?
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this.formatPh(ph.startName) :
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`${this.formatPh(ph.startName)}${ph.children.map(child => child.visit(this)).join('')}${this.formatPh(ph.closeName)}`;
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}
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visitPlaceholder(ph: i18n.Placeholder): any { return this.formatPh(ph.name); }
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visitIcuPlaceholder(ph: i18n.IcuPlaceholder, context?: any): any {
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return this.formatPh(ph.name);
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}
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}
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const serializerVisitor = new GetMsgSerializerVisitor();
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export function serializeI18nMessageForGetMsg(message: i18n.Message): string {
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return message.nodes.map(node => node.visit(serializerVisitor, null)).join('');
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}
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