@angular/compiler
Version:
Angular - the compiler library
65 lines • 9.96 kB
JavaScript
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import * as i18n from '../i18n_ast';
export class Serializer {
// Creates a name mapper, see `PlaceholderMapper`
// Returning `null` means that no name mapping is used.
createNameMapper(message) { return null; }
}
/**
* A simple mapper that take a function to transform an internal name to a public name
*/
export class SimplePlaceholderMapper extends i18n.RecurseVisitor {
// create a mapping from the message
constructor(message, mapName) {
super();
this.mapName = mapName;
this.internalToPublic = {};
this.publicToNextId = {};
this.publicToInternal = {};
message.nodes.forEach(node => node.visit(this));
}
toPublicName(internalName) {
return this.internalToPublic.hasOwnProperty(internalName) ?
this.internalToPublic[internalName] :
null;
}
toInternalName(publicName) {
return this.publicToInternal.hasOwnProperty(publicName) ? this.publicToInternal[publicName] :
null;
}
visitText(text, context) { return null; }
visitTagPlaceholder(ph, context) {
this.visitPlaceholderName(ph.startName);
super.visitTagPlaceholder(ph, context);
this.visitPlaceholderName(ph.closeName);
}
visitPlaceholder(ph, context) { this.visitPlaceholderName(ph.name); }
visitIcuPlaceholder(ph, context) {
this.visitPlaceholderName(ph.name);
}
// XMB placeholders could only contains A-Z, 0-9 and _
visitPlaceholderName(internalName) {
if (!internalName || this.internalToPublic.hasOwnProperty(internalName)) {
return;
}
let publicName = this.mapName(internalName);
if (this.publicToInternal.hasOwnProperty(publicName)) {
// Create a new XMB when it has already been used
const nextId = this.publicToNextId[publicName];
this.publicToNextId[publicName] = nextId + 1;
publicName = `${publicName}_${nextId}`;
}
else {
this.publicToNextId[publicName] = 1;
}
this.internalToPublic[internalName] = publicName;
this.publicToInternal[publicName] = internalName;
}
}
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