ng-zorro-antd/esm2015/core/highlight/highlight.pipe.js

An enterprise-class UI components based on Ant Design and Angular

/**
 * @fileoverview added by tsickle
 * Generated from: highlight.pipe.ts
 * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * @license
 * Copyright Alibaba.com 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://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
import { Pipe } from '@angular/core';
// Regular Expressions for parsing tags and attributes
/** @type {?} */
const SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
// ! to ~ is the ASCII range.
/** @type {?} */
const NON_ALPHANUMERIC_REGEXP = /([^\#-~ |!])/g;
/**
 * Escapes all potentially dangerous characters, so that the
 * resulting string can be safely inserted into attribute or
 * element text.
 * @param {?} value
 * @return {?}
 */
function encodeEntities(value) {
    return value
        .replace(/&/g, '&')
        .replace(SURROGATE_PAIR_REGEXP, (/**
     * @param {?} match
     * @return {?}
     */
    (match) => {
        /** @type {?} */
        const hi = match.charCodeAt(0);
        /** @type {?} */
        const low = match.charCodeAt(1);
        return `&#${(hi - 0xd800) * 0x400 + (low - 0xdc00) + 0x10000};`;
    }))
        .replace(NON_ALPHANUMERIC_REGEXP, (/**
     * @param {?} match
     * @return {?}
     */
    (match) => `&#${match.charCodeAt(0)};`))
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;');
}
export class NzHighlightPipe {
    constructor() {
        this.UNIQUE_WRAPPERS = ['##==-open_tag-==##', '##==-close_tag-==##'];
    }
    /**
     * @param {?} value
     * @param {?} highlightValue
     * @param {?=} flags
     * @param {?=} klass
     * @return {?}
     */
    transform(value, highlightValue, flags, klass) {
        if (!highlightValue) {
            return value;
        }
        // Escapes regex keyword to interpret these characters literally
        /** @type {?} */
        const searchValue = new RegExp(highlightValue.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$&'), flags);
        /** @type {?} */
        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.decorators = [
    { type: Pipe, args: [{
                name: 'nzHighlight',
                pure: true
            },] }
];
if (false) {
    /**
     * @type {?}
     * @private
     */
    NzHighlightPipe.prototype.UNIQUE_WRAPPERS;
}
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