node_modules/@angular/cdk/schematics/ng-update/html-parsing/elements.js

"use strict";
/**
 * @license
 * Copyright Google LLC 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://angular.io/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.getStartOffsetOfAttribute = exports.findAttributeOnElementWithAttrs = exports.findAttributeOnElementWithTag = exports.findElementsWithAttribute = void 0;
const parse5_1 = require("parse5");
/**
 * Parses a HTML fragment and traverses all AST nodes in order find elements that
 * include the specified attribute.
 */
function findElementsWithAttribute(html, attributeName) {
    const document = parse5_1.parseFragment(html, { sourceCodeLocationInfo: true });
    const elements = [];
    const visitNodes = nodes => {
        nodes.forEach(node => {
            if (node.childNodes) {
                visitNodes(node.childNodes);
            }
            if (node.attrs && node.attrs.some(attr => attr.name === attributeName.toLowerCase())) {
                elements.push(node);
            }
        });
    };
    visitNodes(document.childNodes);
    return elements;
}
exports.findElementsWithAttribute = findElementsWithAttribute;
/**
 * Finds elements with explicit tag names that also contain the specified attribute. Returns the
 * attribute start offset based on the specified HTML.
 */
function findAttributeOnElementWithTag(html, name, tagNames) {
    return findElementsWithAttribute(html, name)
        .filter(element => tagNames.includes(element.tagName))
        .map(element => getStartOffsetOfAttribute(element, name));
}
exports.findAttributeOnElementWithTag = findAttributeOnElementWithTag;
/**
 * Finds elements that contain the given attribute and contain at least one of the other
 * specified attributes. Returns the primary attribute's start offset based on the specified HTML.
 */
function findAttributeOnElementWithAttrs(html, name, attrs) {
    return findElementsWithAttribute(html, name)
        .filter(element => attrs.some(attr => hasElementAttribute(element, attr)))
        .map(element => getStartOffsetOfAttribute(element, name));
}
exports.findAttributeOnElementWithAttrs = findAttributeOnElementWithAttrs;
/** Shorthand function that checks if the specified element contains the given attribute. */
function hasElementAttribute(element, attributeName) {
    return element.attrs && element.attrs.some(attr => attr.name === attributeName.toLowerCase());
}
/** Gets the start offset of the given attribute from a Parse5 element. */
function getStartOffsetOfAttribute(element, attributeName) {
    return element.sourceCodeLocation.attrs[attributeName.toLowerCase()].startOffset;
}
exports.getStartOffsetOfAttribute = getStartOffsetOfAttribute;
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