@ngx-translate/core
Version:
The internationalization (i18n) library for Angular
194 lines • 18.8 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
*/
import { ChangeDetectorRef, Injectable, Pipe } from '@angular/core';
import { TranslateService } from './translate.service';
import { equals, isDefined } from './util';
var TranslatePipe = /** @class */ (function () {
function TranslatePipe(translate, _ref) {
this.translate = translate;
this._ref = _ref;
this.value = '';
}
/**
* @param {?} key
* @param {?=} interpolateParams
* @param {?=} translations
* @return {?}
*/
TranslatePipe.prototype.updateValue = /**
* @param {?} key
* @param {?=} interpolateParams
* @param {?=} translations
* @return {?}
*/
function (key, interpolateParams, translations) {
var _this = this;
/** @type {?} */
var onTranslation = function (res) {
_this.value = res !== undefined ? res : key;
_this.lastKey = key;
_this._ref.markForCheck();
};
if (translations) {
/** @type {?} */
var res = this.translate.getParsedResult(translations, key, interpolateParams);
if (typeof res.subscribe === 'function') {
res.subscribe(onTranslation);
}
else {
onTranslation(res);
}
}
this.translate.get(key, interpolateParams).subscribe(onTranslation);
};
/**
* @param {?} query
* @param {...?} args
* @return {?}
*/
TranslatePipe.prototype.transform = /**
* @param {?} query
* @param {...?} args
* @return {?}
*/
function (query) {
var _this = this;
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
if (!query || query.length === 0) {
return query;
}
// if we ask another time for the same key, return the last value
if (equals(query, this.lastKey) && equals(args, this.lastParams)) {
return this.value;
}
/** @type {?} */
var interpolateParams;
if (isDefined(args[0]) && args.length) {
if (typeof args[0] === 'string' && args[0].length) {
// we accept objects written in the template such as {n:1}, {'n':1}, {n:'v'}
// which is why we might need to change it to real JSON objects such as {"n":1} or {"n":"v"}
/** @type {?} */
var validArgs = args[0]
.replace(/(\')?([a-zA-Z0-9_]+)(\')?(\s)?:/g, '"$2":')
.replace(/:(\s)?(\')(.*?)(\')/g, ':"$3"');
try {
interpolateParams = JSON.parse(validArgs);
}
catch (e) {
throw new SyntaxError("Wrong parameter in TranslatePipe. Expected a valid Object, received: " + args[0]);
}
}
else if (typeof args[0] === 'object' && !Array.isArray(args[0])) {
interpolateParams = args[0];
}
}
// store the query, in case it changes
this.lastKey = query;
// store the params, in case they change
this.lastParams = args;
// set the value
this.updateValue(query, interpolateParams);
// if there is a subscription to onLangChange, clean it
this._dispose();
// subscribe to onTranslationChange event, in case the translations change
if (!this.onTranslationChange) {
this.onTranslationChange = this.translate.onTranslationChange.subscribe(function (event) {
if (_this.lastKey && event.lang === _this.translate.currentLang) {
_this.lastKey = null;
_this.updateValue(query, interpolateParams, event.translations);
}
});
}
// subscribe to onLangChange event, in case the language changes
if (!this.onLangChange) {
this.onLangChange = this.translate.onLangChange.subscribe(function (event) {
if (_this.lastKey) {
_this.lastKey = null; // we want to make sure it doesn't return the same value until it's been updated
_this.updateValue(query, interpolateParams, event.translations);
}
});
}
// subscribe to onDefaultLangChange event, in case the default language changes
if (!this.onDefaultLangChange) {
this.onDefaultLangChange = this.translate.onDefaultLangChange.subscribe(function () {
if (_this.lastKey) {
_this.lastKey = null; // we want to make sure it doesn't return the same value until it's been updated
_this.updateValue(query, interpolateParams);
}
});
}
return this.value;
};
/**
* Clean any existing subscription to change events
*/
/**
* Clean any existing subscription to change events
* @return {?}
*/
TranslatePipe.prototype._dispose = /**
* Clean any existing subscription to change events
* @return {?}
*/
function () {
if (typeof this.onTranslationChange !== 'undefined') {
this.onTranslationChange.unsubscribe();
this.onTranslationChange = undefined;
}
if (typeof this.onLangChange !== 'undefined') {
this.onLangChange.unsubscribe();
this.onLangChange = undefined;
}
if (typeof this.onDefaultLangChange !== 'undefined') {
this.onDefaultLangChange.unsubscribe();
this.onDefaultLangChange = undefined;
}
};
/**
* @return {?}
*/
TranslatePipe.prototype.ngOnDestroy = /**
* @return {?}
*/
function () {
this._dispose();
};
TranslatePipe.decorators = [
{ type: Injectable },
{ type: Pipe, args: [{
name: 'translate',
pure: false // required to update the value when the promise is resolved
},] }
];
/** @nocollapse */
TranslatePipe.ctorParameters = function () { return [
{ type: TranslateService },
{ type: ChangeDetectorRef }
]; };
return TranslatePipe;
}());
export { TranslatePipe };
if (false) {
/** @type {?} */
TranslatePipe.prototype.value;
/** @type {?} */
TranslatePipe.prototype.lastKey;
/** @type {?} */
TranslatePipe.prototype.lastParams;
/** @type {?} */
TranslatePipe.prototype.onTranslationChange;
/** @type {?} */
TranslatePipe.prototype.onLangChange;
/** @type {?} */
TranslatePipe.prototype.onDefaultLangChange;
/** @type {?} */
TranslatePipe.prototype.translate;
/** @type {?} */
TranslatePipe.prototype._ref;
}
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{ChangeDetectorRef, EventEmitter, Injectable, OnDestroy, Pipe, PipeTransform} from '@angular/core';\nimport {DefaultLangChangeEvent, LangChangeEvent, TranslateService, TranslationChangeEvent} from './translate.service';\nimport {equals, isDefined} from './util';\n\n@Injectable()\n@Pipe({\n  name: 'translate',\n  pure: false // required to update the value when the promise is resolved\n})\nexport class TranslatePipe implements PipeTransform, OnDestroy {\n  value: string = '';\n  lastKey: string;\n  lastParams: any[];\n  onTranslationChange: EventEmitter<TranslationChangeEvent>;\n  onLangChange: EventEmitter<LangChangeEvent>;\n  onDefaultLangChange: EventEmitter<DefaultLangChangeEvent>;\n\n  constructor(private translate: TranslateService, private _ref: ChangeDetectorRef) {\n  }\n\n  updateValue(key: string, interpolateParams?: Object, translations?: any): void {\n    let onTranslation = (res: string) => {\n      this.value = res !== undefined ? res : key;\n      this.lastKey = key;\n      this._ref.markForCheck();\n    };\n    if (translations) {\n      let res = this.translate.getParsedResult(translations, key, interpolateParams);\n      if (typeof res.subscribe === 'function') {\n        res.subscribe(onTranslation);\n      } else {\n        onTranslation(res);\n      }\n    }\n    this.translate.get(key, interpolateParams).subscribe(onTranslation);\n  }\n\n  transform(query: string, ...args: any[]): any {\n    if (!query || query.length === 0) {\n      return query;\n    }\n\n    // if we ask another time for the same key, return the last value\n    if (equals(query, this.lastKey) && equals(args, this.lastParams)) {\n      return this.value;\n    }\n\n    let interpolateParams: Object;\n    if (isDefined(args[0]) && args.length) {\n      if (typeof args[0] === 'string' && args[0].length) {\n        // we accept objects written in the template such as {n:1}, {'n':1}, {n:'v'}\n        // which is why we might need to change it to real JSON objects such as {\"n\":1} or {\"n\":\"v\"}\n        let validArgs: string = args[0]\n          .replace(/(\\')?([a-zA-Z0-9_]+)(\\')?(\\s)?:/g, '\"$2\":')\n          .replace(/:(\\s)?(\\')(.*?)(\\')/g, ':\"$3\"');\n        try {\n          interpolateParams = JSON.parse(validArgs);\n        } catch (e) {\n          throw new SyntaxError(`Wrong parameter in TranslatePipe. Expected a valid Object, received: ${args[0]}`);\n        }\n      } else if (typeof args[0] === 'object' && !Array.isArray(args[0])) {\n        interpolateParams = args[0];\n      }\n    }\n\n    // store the query, in case it changes\n    this.lastKey = query;\n\n    // store the params, in case they change\n    this.lastParams = args;\n\n    // set the value\n    this.updateValue(query, interpolateParams);\n\n    // if there is a subscription to onLangChange, clean it\n    this._dispose();\n\n    // subscribe to onTranslationChange event, in case the translations change\n    if (!this.onTranslationChange) {\n      this.onTranslationChange = this.translate.onTranslationChange.subscribe((event: TranslationChangeEvent) => {\n        if (this.lastKey && event.lang === this.translate.currentLang) {\n          this.lastKey = null;\n          this.updateValue(query, interpolateParams, event.translations);\n        }\n      });\n    }\n\n    // subscribe to onLangChange event, in case the language changes\n    if (!this.onLangChange) {\n      this.onLangChange = this.translate.onLangChange.subscribe((event: LangChangeEvent) => {\n        if (this.lastKey) {\n          this.lastKey = null; // we want to make sure it doesn't return the same value until it's been updated\n          this.updateValue(query, interpolateParams, event.translations);\n        }\n      });\n    }\n\n    // subscribe to onDefaultLangChange event, in case the default language changes\n    if (!this.onDefaultLangChange) {\n      this.onDefaultLangChange = this.translate.onDefaultLangChange.subscribe(() => {\n        if (this.lastKey) {\n          this.lastKey = null; // we want to make sure it doesn't return the same value until it's been updated\n          this.updateValue(query, interpolateParams);\n        }\n      });\n    }\n\n    return this.value;\n  }\n\n  /**\n   * Clean any existing subscription to change events\n   */\n  private _dispose(): void {\n    if (typeof this.onTranslationChange !== 'undefined') {\n      this.onTranslationChange.unsubscribe();\n      this.onTranslationChange = undefined;\n    }\n    if (typeof this.onLangChange !== 'undefined') {\n      this.onLangChange.unsubscribe();\n      this.onLangChange = undefined;\n    }\n    if (typeof this.onDefaultLangChange !== 'undefined') {\n      this.onDefaultLangChange.unsubscribe();\n      this.onDefaultLangChange = undefined;\n    }\n  }\n\n  ngOnDestroy(): void {\n    this._dispose();\n  }\n}\n"]}