@ngx-translate/core
Version:
The internationalization (i18n) library for Angular
225 lines • 21.3 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
*/
import { ChangeDetectorRef, Directive, ElementRef, Input } from '@angular/core';
import { TranslateService } from './translate.service';
import { equals, isDefined } from './util';
export class TranslateDirective {
/**
* @param {?} translateService
* @param {?} element
* @param {?} _ref
*/
constructor(translateService, element, _ref) {
this.translateService = translateService;
this.element = element;
this._ref = _ref;
// subscribe to onTranslationChange event, in case the translations of the current lang change
if (!this.onTranslationChangeSub) {
this.onTranslationChangeSub = this.translateService.onTranslationChange.subscribe((event) => {
if (event.lang === this.translateService.currentLang) {
this.checkNodes(true, event.translations);
}
});
}
// subscribe to onLangChange event, in case the language changes
if (!this.onLangChangeSub) {
this.onLangChangeSub = this.translateService.onLangChange.subscribe((event) => {
this.checkNodes(true, event.translations);
});
}
// subscribe to onDefaultLangChange event, in case the default language changes
if (!this.onDefaultLangChangeSub) {
this.onDefaultLangChangeSub = this.translateService.onDefaultLangChange.subscribe((event) => {
this.checkNodes(true);
});
}
}
/**
* @param {?} key
* @return {?}
*/
set translate(key) {
if (key) {
this.key = key;
this.checkNodes();
}
}
/**
* @param {?} params
* @return {?}
*/
set translateParams(params) {
if (!equals(this.currentParams, params)) {
this.currentParams = params;
this.checkNodes(true);
}
}
/**
* @return {?}
*/
ngAfterViewChecked() {
this.checkNodes();
}
/**
* @param {?=} forceUpdate
* @param {?=} translations
* @return {?}
*/
checkNodes(forceUpdate = false, translations) {
/** @type {?} */
let nodes = this.element.nativeElement.childNodes;
// if the element is empty
if (!nodes.length) {
// we add the key as content
this.setContent(this.element.nativeElement, this.key);
nodes = this.element.nativeElement.childNodes;
}
for (let i = 0; i < nodes.length; ++i) {
/** @type {?} */
let node = nodes[i];
if (node.nodeType === 3) { // node type 3 is a text node
// node type 3 is a text node
/** @type {?} */
let key;
if (this.key) {
key = this.key;
if (forceUpdate) {
node.lastKey = null;
}
}
else {
/** @type {?} */
let content = this.getContent(node);
/** @type {?} */
let trimmedContent = content.trim();
if (trimmedContent.length) {
// we want to use the content as a key, not the translation value
if (content !== node.currentValue) {
key = trimmedContent;
// the content was changed from the user, we'll use it as a reference if needed
node.originalContent = this.getContent(node);
}
else if (node.originalContent && forceUpdate) { // the content seems ok, but the lang has changed
node.lastKey = null;
// the current content is the translation, not the key, use the last real content as key
key = node.originalContent.trim();
}
}
}
this.updateValue(key, node, translations);
}
}
}
/**
* @param {?} key
* @param {?} node
* @param {?} translations
* @return {?}
*/
updateValue(key, node, translations) {
if (key) {
if (node.lastKey === key && this.lastParams === this.currentParams) {
return;
}
this.lastParams = this.currentParams;
/** @type {?} */
let onTranslation = (res) => {
if (res !== key) {
node.lastKey = key;
}
if (!node.originalContent) {
node.originalContent = this.getContent(node);
}
node.currentValue = isDefined(res) ? res : (node.originalContent || key);
// we replace in the original content to preserve spaces that we might have trimmed
this.setContent(node, this.key ? node.currentValue : node.originalContent.replace(key, node.currentValue));
this._ref.markForCheck();
};
if (isDefined(translations)) {
/** @type {?} */
let res = this.translateService.getParsedResult(translations, key, this.currentParams);
if (typeof res.subscribe === "function") {
res.subscribe(onTranslation);
}
else {
onTranslation(res);
}
}
else {
this.translateService.get(key, this.currentParams).subscribe(onTranslation);
}
}
}
/**
* @param {?} node
* @return {?}
*/
getContent(node) {
return isDefined(node.textContent) ? node.textContent : node.data;
}
/**
* @param {?} node
* @param {?} content
* @return {?}
*/
setContent(node, content) {
if (isDefined(node.textContent)) {
node.textContent = content;
}
else {
node.data = content;
}
}
/**
* @return {?}
*/
ngOnDestroy() {
if (this.onLangChangeSub) {
this.onLangChangeSub.unsubscribe();
}
if (this.onDefaultLangChangeSub) {
this.onDefaultLangChangeSub.unsubscribe();
}
if (this.onTranslationChangeSub) {
this.onTranslationChangeSub.unsubscribe();
}
}
}
TranslateDirective.decorators = [
{ type: Directive, args: [{
selector: '[translate],[ngx-translate]'
},] }
];
/** @nocollapse */
TranslateDirective.ctorParameters = () => [
{ type: TranslateService },
{ type: ElementRef },
{ type: ChangeDetectorRef }
];
TranslateDirective.propDecorators = {
translate: [{ type: Input }],
translateParams: [{ type: Input }]
};
if (false) {
/** @type {?} */
TranslateDirective.prototype.key;
/** @type {?} */
TranslateDirective.prototype.lastParams;
/** @type {?} */
TranslateDirective.prototype.currentParams;
/** @type {?} */
TranslateDirective.prototype.onLangChangeSub;
/** @type {?} */
TranslateDirective.prototype.onDefaultLangChangeSub;
/** @type {?} */
TranslateDirective.prototype.onTranslationChangeSub;
/** @type {?} */
TranslateDirective.prototype.translateService;
/** @type {?} */
TranslateDirective.prototype.element;
/** @type {?} */
TranslateDirective.prototype._ref;
}
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{AfterViewChecked, ChangeDetectorRef, Directive, ElementRef, Input, OnDestroy} from '@angular/core';\nimport {Subscription} from 'rxjs';\nimport {DefaultLangChangeEvent, LangChangeEvent, TranslateService, TranslationChangeEvent} from './translate.service';\nimport {equals, isDefined} from './util';\n\n@Directive({\n  selector: '[translate],[ngx-translate]'\n})\nexport class TranslateDirective implements AfterViewChecked, OnDestroy {\n  key: string;\n  lastParams: any;\n  currentParams: any;\n  onLangChangeSub: Subscription;\n  onDefaultLangChangeSub: Subscription;\n  onTranslationChangeSub: Subscription;\n\n  @Input() set translate(key: string) {\n    if (key) {\n      this.key = key;\n      this.checkNodes();\n    }\n  }\n\n  @Input() set translateParams(params: any) {\n    if (!equals(this.currentParams, params)) {\n      this.currentParams = params;\n      this.checkNodes(true);\n    }\n  }\n\n  constructor(private translateService: TranslateService, private element: ElementRef, private _ref: ChangeDetectorRef) {\n    // subscribe to onTranslationChange event, in case the translations of the current lang change\n    if (!this.onTranslationChangeSub) {\n      this.onTranslationChangeSub = this.translateService.onTranslationChange.subscribe((event: TranslationChangeEvent) => {\n        if (event.lang === this.translateService.currentLang) {\n          this.checkNodes(true, event.translations);\n        }\n      });\n    }\n\n    // subscribe to onLangChange event, in case the language changes\n    if (!this.onLangChangeSub) {\n      this.onLangChangeSub = this.translateService.onLangChange.subscribe((event: LangChangeEvent) => {\n        this.checkNodes(true, event.translations);\n      });\n    }\n\n    // subscribe to onDefaultLangChange event, in case the default language changes\n    if (!this.onDefaultLangChangeSub) {\n      this.onDefaultLangChangeSub = this.translateService.onDefaultLangChange.subscribe((event: DefaultLangChangeEvent) => {\n        this.checkNodes(true);\n      });\n    }\n  }\n\n  ngAfterViewChecked() {\n    this.checkNodes();\n  }\n\n  checkNodes(forceUpdate = false, translations?: any) {\n    let nodes: NodeList = this.element.nativeElement.childNodes;\n    // if the element is empty\n    if (!nodes.length) {\n      // we add the key as content\n      this.setContent(this.element.nativeElement, this.key);\n      nodes = this.element.nativeElement.childNodes;\n    }\n    for (let i = 0; i < nodes.length; ++i) {\n      let node: any = nodes[i];\n      if (node.nodeType === 3) { // node type 3 is a text node\n        let key: string;\n        if (this.key) {\n          key = this.key;\n          if (forceUpdate) {\n            node.lastKey = null;\n          }\n        } else {\n          let content = this.getContent(node);\n          let trimmedContent = content.trim();\n          if (trimmedContent.length) {\n            // we want to use the content as a key, not the translation value\n            if (content !== node.currentValue) {\n              key = trimmedContent;\n              // the content was changed from the user, we'll use it as a reference if needed\n              node.originalContent = this.getContent(node);\n            } else if (node.originalContent && forceUpdate) { // the content seems ok, but the lang has changed\n              node.lastKey = null;\n              // the current content is the translation, not the key, use the last real content as key\n              key = node.originalContent.trim();\n            }\n          }\n        }\n        this.updateValue(key, node, translations);\n      }\n    }\n  }\n\n  updateValue(key: string, node: any, translations: any) {\n    if (key) {\n      if (node.lastKey === key && this.lastParams === this.currentParams) {\n        return;\n      }\n\n      this.lastParams = this.currentParams;\n\n      let onTranslation = (res: string) => {\n        if (res !== key) {\n          node.lastKey = key;\n        }\n        if (!node.originalContent) {\n          node.originalContent = this.getContent(node);\n        }\n        node.currentValue = isDefined(res) ? res : (node.originalContent || key);\n        // we replace in the original content to preserve spaces that we might have trimmed\n        this.setContent(node, this.key ? node.currentValue : node.originalContent.replace(key, node.currentValue));\n        this._ref.markForCheck();\n      };\n\n      if (isDefined(translations)) {\n        let res = this.translateService.getParsedResult(translations, key, this.currentParams);\n        if (typeof res.subscribe === \"function\") {\n          res.subscribe(onTranslation);\n        } else {\n          onTranslation(res);\n        }\n      } else {\n        this.translateService.get(key, this.currentParams).subscribe(onTranslation);\n      }\n    }\n  }\n\n  getContent(node: any): string {\n    return isDefined(node.textContent) ? node.textContent : node.data;\n  }\n\n  setContent(node: any, content: string): void {\n    if (isDefined(node.textContent)) {\n      node.textContent = content;\n    } else {\n      node.data = content;\n    }\n  }\n\n  ngOnDestroy() {\n    if (this.onLangChangeSub) {\n      this.onLangChangeSub.unsubscribe();\n    }\n\n    if (this.onDefaultLangChangeSub) {\n      this.onDefaultLangChangeSub.unsubscribe();\n    }\n\n    if (this.onTranslationChangeSub) {\n      this.onTranslationChangeSub.unsubscribe();\n    }\n  }\n}\n"]}