ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
53 lines • 7.31 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { Pipe } from '@angular/core';
import * as i0 from "@angular/core";
// Regular Expressions for parsing tags and attributes
const SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
// ! to ~ is the ASCII range.
const NON_ALPHANUMERIC_REGEXP = /([^\#-~ |!])/g;
/**
* Escapes all potentially dangerous characters, so that the
* resulting string can be safely inserted into attribute or
* element text.
*/
function encodeEntities(value) {
return value
.replace(/&/g, '&')
.replace(SURROGATE_PAIR_REGEXP, (match) => {
const hi = match.charCodeAt(0);
const low = match.charCodeAt(1);
return `&#${(hi - 0xd800) * 0x400 + (low - 0xdc00) + 0x10000};`;
})
.replace(NON_ALPHANUMERIC_REGEXP, (match) => `&#${match.charCodeAt(0)};`)
.replace(/</g, '<')
.replace(/>/g, '>');
}
export class NzHighlightPipe {
constructor() {
this.UNIQUE_WRAPPERS = ['##==-open_tag-==##', '##==-close_tag-==##'];
}
transform(value, highlightValue, flags, klass) {
if (!highlightValue) {
return value;
}
// Escapes regex keyword to interpret these characters literally
const searchValue = new RegExp(highlightValue.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$&'), flags);
const wrapValue = value.replace(searchValue, `${this.UNIQUE_WRAPPERS[0]}$&${this.UNIQUE_WRAPPERS[1]}`);
return encodeEntities(wrapValue)
.replace(new RegExp(this.UNIQUE_WRAPPERS[0], 'g'), klass ? `<span class="${klass}">` : '<span>')
.replace(new RegExp(this.UNIQUE_WRAPPERS[1], 'g'), '</span>');
}
}
NzHighlightPipe.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.1.3", ngImport: i0, type: NzHighlightPipe, deps: [], target: i0.ɵɵFactoryTarget.Pipe });
NzHighlightPipe.ɵpipe = i0.ɵɵngDeclarePipe({ minVersion: "14.0.0", version: "14.1.3", ngImport: i0, type: NzHighlightPipe, name: "nzHighlight" });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.1.3", ngImport: i0, type: NzHighlightPipe, decorators: [{
type: Pipe,
args: [{
name: 'nzHighlight',
pure: true
}]
}] });
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