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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = collectDependencies;
exports.parseFuncIRI = parseFuncIRI;
function _posthtml() {
const data = _interopRequireDefault(require("posthtml"));
_posthtml = function () {
return data;
};
return data;
}
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
// A list of all attributes that may produce a dependency
// Based on https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute
// See also https://www.w3.org/TR/SVG/attindex.html and https://www.w3.org/TR/SVG11/attindex.html
// SVG animation elements are excluded because they may only reference elements in the same document: https://www.w3.org/TR/SVG/linking.html#processingURL-fetch
const HREF_ATTRS = ['a', 'use', 'feImage', 'image', 'linearGradient', 'radialGradient', 'pattern', 'mpath', 'textPath', 'script'];
const ATTRS = {
href: HREF_ATTRS,
'xlink:href': [...HREF_ATTRS, 'altGlyph', 'cursor', 'filter', 'font-face-uri', 'glyphRef', 'tref', 'color-profile']
}; // Attributes that allow url() to reference another element, either in the same document or a different one.
// https://www.w3.org/TR/SVG11/linking.html#processingIRI
const FUNC_IRI_ATTRS = new Set(['fill', 'stroke', 'clip-path', 'color-profile', 'cursor', 'filter', 'marker', 'marker-start', 'marker-mid', 'marker-end', 'mask', // SVG2 - https://www.w3.org/TR/SVG/linking.html#processingURL-validity
'shape-inside', 'shape-subtract', 'mask-image']); // https://www.w3.org/TR/css3-values/#urls
const FUNC_IRI_RE = /^url\((?:((['"])(.*?)\2(\s+.*)?)|((?:\\[\s'"]|[^\s'"])+))\)$/;
const ESCAPE_RE = /\\(.|\n|\r|\u2028|\u2029)/;
function parseFuncIRI(value) {
let m = value.match(FUNC_IRI_RE);
if (m) {
var _m$;
let url = (m[3] || m[5]).replace(ESCAPE_RE, '$1');
let modifier = (_m$ = m[4]) !== null && _m$ !== void 0 ? _m$ : '';
return [url, modifier];
}
} // Options to be passed to `addDependency` for certain tags + attributes
const OPTIONS = {
a: {
href: {
needsStableName: true
},
'xlink:href': {
needsStableName: true
}
}
};
function collectDependencies(asset, ast) {
let isDirty = false;
const errors = [];
(0, _posthtml().default)().walk.call(ast.program, node => {
// Ideally we'd have location information for specific attributes...
let getLoc = () => node.location ? {
filePath: asset.filePath,
start: node.location.start,
end: node.location.end
} : undefined;
if (typeof node === 'string' && node.startsWith('<?xml-stylesheet')) {
return node.replace(/(?<=(?:^|\s)href\s*=\s*")(.+?)(?=")/i, href => {
isDirty = true;
return asset.addURLDependency(href, {
priority: 'parallel'
});
});
}
const {
tag,
attrs
} = node;
if (!attrs) {
return node;
}
for (const attr in attrs) {
// Check for id references
if (attrs[attr][0] === '#') {
continue;
}
const elements = ATTRS[attr];
if (elements && elements.includes(node.tag)) {
var _OPTIONS$tag;
// Check for empty string
if (attrs[attr].length === 0) {
errors.push({
message: `'${attr}' should not be empty string`,
filePath: asset.filePath,
loc: node.location
});
}
let options = (_OPTIONS$tag = OPTIONS[tag]) === null || _OPTIONS$tag === void 0 ? void 0 : _OPTIONS$tag[attr];
if (node.tag === 'script') {
options = {
priority: 'parallel',
env: {
sourceType: attrs.type === 'module' ? 'module' : 'script',
// SVG script elements do not support type="module" natively yet.
outputFormat: 'global',
loc: getLoc()
}
};
delete attrs.type;
}
attrs[attr] = asset.addURLDependency(attrs[attr], { ...options,
loc: getLoc()
});
isDirty = true;
}
if (FUNC_IRI_ATTRS.has(attr)) {
let parsed = parseFuncIRI(attrs[attr]);
if (parsed) {
let depId = asset.addURLDependency(parsed[0], {
loc: getLoc()
});
attrs[attr] = `url('${depId}'${parsed[1]})`;
isDirty = true;
}
}
}
return node;
});
if (errors.length > 0) {
throw errors;
}
if (isDirty) {
asset.setAST(ast);
}
}