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feat(ivy): i18n - render legacy message ids in $localize if requested (#32937)

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The `$localize` library uses a new message digest function for
computing message ids. This means that translations in legacy
translation files will no longer match the message ids in the code
and so will not be translated.

This commit adds the ability to specify the format of your legacy
translation files, so that the appropriate message id can be rendered
in the `$localize` tagged strings. This results in larger code size
and requires that all translations are in the legacy format.

Going forward the developer should migrate their translation files
to use the new message id format.

PR Close #32937
This commit is contained in:
Pete Bacon Darwin
2019-10-01 14:58:49 +01:00
committed by atscott
parent fc28b266cd
commit bcbf3e4123
11 changed files with 148 additions and 22 deletions
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26
packages/compiler/src/i18n/digest.ts
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@ -10,15 +10,31 @@ import {newArray, utf8Encode} from '../util';
import * as i18n from './i18n_ast';
/**
* Return the message id or compute it using the XLIFF1 digest.
*/
export function digest(message: i18n.Message): string {
return message.id || sha1(serializeNodes(message.nodes).join('') + `[${message.meaning}]`);
return message.id || computeDigest(message);
}
export function decimalDigest(message: i18n.Message): string {
if (message.id) {
return message.id;
}
/**
* Compute the message id using the XLIFF1 digest.
*/
export function computeDigest(message: i18n.Message): string {
return sha1(serializeNodes(message.nodes).join('') + `[${message.meaning}]`);
}
/**
* Return the message id or compute it using the XLIFF2/XMB/$localize digest.
*/
export function decimalDigest(message: i18n.Message): string {
return message.id || computeDecimalDigest(message);
}
/**
* Compute the message id using the XLIFF2/XMB/$localize digest.
*/
export function computeDecimalDigest(message: i18n.Message): string {
const visitor = new _SerializerIgnoreIcuExpVisitor();
const parts = message.nodes.map(a => a.visit(visitor, null));
return computeMsgId(parts.join(''), message.meaning);