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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.parseSrcset = parseSrcset;
exports.parseSrc = parseSrc;
exports.normalizeUrl = normalizeUrl;
exports.requestify = requestify;
exports.isUrlRequestable = isUrlRequestable;
exports.normalizeOptions = normalizeOptions;
exports.pluginRunner = pluginRunner;
exports.getFilter = getFilter;
exports.getImportCode = getImportCode;
exports.getModuleCode = getModuleCode;
exports.getExportCode = getExportCode;
var _loaderUtils = require("loader-utils");
function isASCIIWhitespace(character) {
return (// Horizontal tab
character === '\u0009' || // New line
character === '\u000A' || // Form feed
character === '\u000C' || // Carriage return
character === '\u000D' || // Space
character === '\u0020'
);
} // (Don't use \s, to avoid matching non-breaking space)
// eslint-disable-next-line no-control-regex
const regexLeadingSpaces = /^[ \t\n\r\u000c]+/; // eslint-disable-next-line no-control-regex
const regexLeadingCommasOrSpaces = /^[, \t\n\r\u000c]+/; // eslint-disable-next-line no-control-regex
const regexLeadingNotSpaces = /^[^ \t\n\r\u000c]+/;
const regexTrailingCommas = /[,]+$/;
const regexNonNegativeInteger = /^\d+$/; // ( Positive or negative or unsigned integers or decimals, without or without exponents.
// Must include at least one digit.
// According to spec tests any decimal point must be followed by a digit.
// No leading plus sign is allowed.)
// https://html.spec.whatwg.org/multipage/infrastructure.html#valid-floating-point-number
const regexFloatingPoint = /^-?(?:[0-9]+|[0-9]*\.[0-9]+)(?:[eE][+-]?[0-9]+)?$/;
function parseSrcset(input) {
// 1. Let input be the value passed to this algorithm.
const inputLength = input.length;
let url;
let descriptors;
let currentDescriptor;
let state;
let c; // 2. Let position be a pointer into input, initially pointing at the start
// of the string.
let position = 0;
let startUrlPosition; // eslint-disable-next-line consistent-return
function collectCharacters(regEx) {
let chars;
const match = regEx.exec(input.substring(position));
if (match) {
[chars] = match;
position += chars.length;
return chars;
}
} // 3. Let candidates be an initially empty source set.
const candidates = []; // 4. Splitting loop: Collect a sequence of characters that are space
// characters or U+002C COMMA characters. If any U+002C COMMA characters
// were collected, that is a parse error.
// eslint-disable-next-line no-constant-condition
while (true) {
collectCharacters(regexLeadingCommasOrSpaces); // 5. If position is past the end of input, return candidates and abort these steps.
if (position >= inputLength) {
if (candidates.length === 0) {
throw new Error('Must contain one or more image candidate strings');
} // (we're done, this is the sole return path)
return candidates;
} // 6. Collect a sequence of characters that are not space characters,
// and let that be url.
startUrlPosition = position;
url = collectCharacters(regexLeadingNotSpaces); // 7. Let descriptors be a new empty list.
descriptors = []; // 8. If url ends with a U+002C COMMA character (,), follow these substeps:
// (1). Remove all trailing U+002C COMMA characters from url. If this removed
// more than one character, that is a parse error.
if (url.slice(-1) === ',') {
url = url.replace(regexTrailingCommas, ''); // (Jump ahead to step 9 to skip tokenization and just push the candidate).
parseDescriptors();
} // Otherwise, follow these substeps:
else {
tokenize();
} // 16. Return to the step labeled splitting loop.
}
/**
* Tokenizes descriptor properties prior to parsing
* Returns undefined.
*/
function tokenize() {
// 8.1. Descriptor tokenizer: Skip whitespace
collectCharacters(regexLeadingSpaces); // 8.2. Let current descriptor be the empty string.
currentDescriptor = ''; // 8.3. Let state be in descriptor.
state = 'in descriptor'; // eslint-disable-next-line no-constant-condition
while (true) {
// 8.4. Let c be the character at position.
c = input.charAt(position); // Do the following depending on the value of state.
// For the purpose of this step, "EOF" is a special character representing
// that position is past the end of input.
// In descriptor
if (state === 'in descriptor') {
// Do the following, depending on the value of c:
// Space character
// If current descriptor is not empty, append current descriptor to
// descriptors and let current descriptor be the empty string.
// Set state to after descriptor.
if (isASCIIWhitespace(c)) {
if (currentDescriptor) {
descriptors.push(currentDescriptor);
currentDescriptor = '';
state = 'after descriptor';
}
} // U+002C COMMA (,)
// Advance position to the next character in input. If current descriptor
// is not empty, append current descriptor to descriptors. Jump to the step
// labeled descriptor parser.
else if (c === ',') {
position += 1;
if (currentDescriptor) {
descriptors.push(currentDescriptor);
}
parseDescriptors();
return;
} // U+0028 LEFT PARENTHESIS (()
// Append c to current descriptor. Set state to in parens.
else if (c === '\u0028') {
currentDescriptor += c;
state = 'in parens';
} // EOF
// If current descriptor is not empty, append current descriptor to
// descriptors. Jump to the step labeled descriptor parser.
else if (c === '') {
if (currentDescriptor) {
descriptors.push(currentDescriptor);
}
parseDescriptors();
return; // Anything else
// Append c to current descriptor.
} else {
currentDescriptor += c;
}
} // In parens
else if (state === 'in parens') {
// U+0029 RIGHT PARENTHESIS ())
// Append c to current descriptor. Set state to in descriptor.
if (c === ')') {
currentDescriptor += c;
state = 'in descriptor';
} // EOF
// Append current descriptor to descriptors. Jump to the step labeled
// descriptor parser.
else if (c === '') {
descriptors.push(currentDescriptor);
parseDescriptors();
return;
} // Anything else
// Append c to current descriptor.
else {
currentDescriptor += c;
}
} // After descriptor
else if (state === 'after descriptor') {
// Do the following, depending on the value of c:
if (isASCIIWhitespace(c)) {// Space character: Stay in this state.
} // EOF: Jump to the step labeled descriptor parser.
else if (c === '') {
parseDescriptors();
return;
} // Anything else
// Set state to in descriptor. Set position to the previous character in input.
else {
state = 'in descriptor';
position -= 1;
}
} // Advance position to the next character in input.
position += 1;
}
}
/**
* Adds descriptor properties to a candidate, pushes to the candidates array
* @return undefined
*/
// Declared outside of the while loop so that it's only created once.
function parseDescriptors() {
// 9. Descriptor parser: Let error be no.
let pError = false; // 10. Let width be absent.
// 11. Let density be absent.
// 12. Let future-compat-h be absent. (We're implementing it now as h)
let w;
let d;
let h;
let i;
const candidate = {};
let desc;
let lastChar;
let value;
let intVal;
let floatVal; // 13. For each descriptor in descriptors, run the appropriate set of steps
// from the following list:
for (i = 0; i < descriptors.length; i++) {
desc = descriptors[i];
lastChar = desc[desc.length - 1];
value = desc.substring(0, desc.length - 1);
intVal = parseInt(value, 10);
floatVal = parseFloat(value); // If the descriptor consists of a valid non-negative integer followed by
// a U+0077 LATIN SMALL LETTER W character
if (regexNonNegativeInteger.test(value) && lastChar === 'w') {
// If width and density are not both absent, then let error be yes.
if (w || d) {
pError = true;
} // Apply the rules for parsing non-negative integers to the descriptor.
// If the result is zero, let error be yes.
// Otherwise, let width be the result.
if (intVal === 0) {
pError = true;
} else {
w = intVal;
}
} // If the descriptor consists of a valid floating-point number followed by
// a U+0078 LATIN SMALL LETTER X character
else if (regexFloatingPoint.test(value) && lastChar === 'x') {
// If width, density and future-compat-h are not all absent, then let error
// be yes.
if (w || d || h) {
pError = true;
} // Apply the rules for parsing floating-point number values to the descriptor.
// If the result is less than zero, let error be yes. Otherwise, let density
// be the result.
if (floatVal < 0) {
pError = true;
} else {
d = floatVal;
}
} // If the descriptor consists of a valid non-negative integer followed by
// a U+0068 LATIN SMALL LETTER H character
else if (regexNonNegativeInteger.test(value) && lastChar === 'h') {
// If height and density are not both absent, then let error be yes.
if (h || d) {
pError = true;
} // Apply the rules for parsing non-negative integers to the descriptor.
// If the result is zero, let error be yes. Otherwise, let future-compat-h
// be the result.
if (intVal === 0) {
pError = true;
} else {
h = intVal;
} // Anything else, Let error be yes.
} else {
pError = true;
}
} // 15. If error is still no, then append a new image source to candidates whose
// URL is url, associated with a width width if not absent and a pixel
// density density if not absent. Otherwise, there is a parse error.
if (!pError) {
candidate.source = {
value: url,
startIndex: startUrlPosition
};
if (w) {
candidate.width = {
value: w
};
}
if (d) {
candidate.density = {
value: d
};
}
if (h) {
candidate.height = {
value: h
};
}
candidates.push(candidate);
} else {
throw new Error(`Invalid srcset descriptor found in '${input}' at '${desc}'`);
}
}
}
function parseSrc(input) {
if (!input) {
throw new Error('Must be non-empty');
}
let startIndex = 0;
let value = input;
while (isASCIIWhitespace(value.substring(0, 1))) {
startIndex += 1;
value = value.substring(1, value.length);
}
while (isASCIIWhitespace(value.substring(value.length - 1, value.length))) {
value = value.substring(0, value.length - 1);
}
if (!value) {
throw new Error('Must be non-empty');
}
return {
value,
startIndex
};
}
function normalizeUrl(url) {
return decodeURIComponent(url).replace(/[\t\n\r]/g, '');
}
function requestify(url, root) {
return (0, _loaderUtils.urlToRequest)(url, root);
}
function isUrlRequestable(url, root) {
return (0, _loaderUtils.isUrlRequest)(url, root);
}
function isProductionMode(loaderContext) {
return loaderContext.mode === 'production' || !loaderContext.mode;
}
const defaultMinimizerOptions = {
caseSensitive: true,
// `collapseBooleanAttributes` is not always safe, since this can break CSS attribute selectors and not safe for XHTML
collapseWhitespace: true,
conservativeCollapse: true,
keepClosingSlash: true,
// We need ability to use cssnano, or setup own function without extra dependencies
minifyCSS: true,
minifyJS: true,
// `minifyURLs` is unsafe, because we can't guarantee what the base URL is
// `removeAttributeQuotes` is not safe in some rare cases, also HTML spec recommends against doing this
removeComments: true,
// `removeEmptyAttributes` is not safe, can affect certain style or script behavior, look at https://github.com/webpack-contrib/html-loader/issues/323
// `removeRedundantAttributes` is not safe, can affect certain style or script behavior, look at https://github.com/webpack-contrib/html-loader/issues/323
removeScriptTypeAttributes: true,
removeStyleLinkTypeAttributes: true // `useShortDoctype` is not safe for XHTML
};
function getMinimizeOption(rawOptions, loaderContext) {
if (typeof rawOptions.minimize === 'undefined') {
return isProductionMode(loaderContext) ? defaultMinimizerOptions : false;
}
if (typeof rawOptions.minimize === 'boolean') {
return rawOptions.minimize === true ? defaultMinimizerOptions : false;
}
return rawOptions.minimize;
}
function getAttributeValue(attributes, name) {
const lowercasedAttributes = Object.keys(attributes).reduce((keys, k) => {
// eslint-disable-next-line no-param-reassign
keys[k.toLowerCase()] = k;
return keys;
}, {});
return attributes[lowercasedAttributes[name.toLowerCase()]];
}
function scriptFilter(tag, attribute, attributes) {
if (attributes.type) {
const type = getAttributeValue(attributes, 'type').trim().toLowerCase();
if (type !== 'module' && type !== 'text/javascript' && type !== 'application/javascript') {
return false;
}
}
return true;
}
const defaultAttributes = [{
tag: 'audio',
attribute: 'src',
type: 'src'
}, {
tag: 'embed',
attribute: 'src',
type: 'src'
}, {
tag: 'img',
attribute: 'src',
type: 'src'
}, {
tag: 'img',
attribute: 'srcset',
type: 'srcset'
}, {
tag: 'input',
attribute: 'src',
type: 'src'
}, {
tag: 'link',
attribute: 'href',
type: 'src',
filter: (tag, attribute, attributes) => {
if (!/stylesheet/i.test(getAttributeValue(attributes, 'rel'))) {
return false;
}
if (attributes.type && getAttributeValue(attributes, 'type').trim().toLowerCase() !== 'text/css') {
return false;
}
return true;
}
}, {
tag: 'object',
attribute: 'data',
type: 'src'
}, {
tag: 'script',
attribute: 'src',
type: 'src',
filter: scriptFilter
}, // Using href with <script> is described here: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/script
{
tag: 'script',
attribute: 'href',
type: 'src',
filter: scriptFilter
}, {
tag: 'script',
attribute: 'xlink:href',
type: 'src',
filter: scriptFilter
}, {
tag: 'source',
attribute: 'src',
type: 'src'
}, {
tag: 'source',
attribute: 'srcset',
type: 'srcset'
}, {
tag: 'track',
attribute: 'src',
type: 'src'
}, {
tag: 'video',
attribute: 'poster',
type: 'src'
}, {
tag: 'video',
attribute: 'src',
type: 'src'
}, // SVG
{
tag: 'image',
attribute: 'xlink:href',
type: 'src'
}, {
tag: 'image',
attribute: 'href',
type: 'src'
}, {
tag: 'use',
attribute: 'xlink:href',
type: 'src'
}, {
tag: 'use',
attribute: 'href',
type: 'src'
}];
function smartMergeSources(array, factory) {
if (typeof array === 'undefined') {
return factory();
}
const newArray = [];
for (let i = 0; i < array.length; i++) {
const item = array[i];
if (item === '...') {
const items = factory();
if (typeof items !== 'undefined') {
// eslint-disable-next-line no-shadow
for (const item of items) {
newArray.push(item);
}
}
} else if (typeof newArray !== 'undefined') {
newArray.push(item);
}
}
return newArray;
}
function getAttributesOption(rawOptions) {
if (typeof rawOptions.attributes === 'undefined') {
return {
list: defaultAttributes
};
}
if (typeof rawOptions.attributes === 'boolean') {
return rawOptions.attributes === true ? {
list: defaultAttributes
} : false;
}
const sources = smartMergeSources(rawOptions.attributes.list, () => defaultAttributes);
return {
list: sources,
urlFilter: rawOptions.attributes.urlFilter,
root: rawOptions.attributes.root
};
}
function normalizeOptions(rawOptions, loaderContext) {
return {
preprocessor: rawOptions.preprocessor,
attributes: getAttributesOption(rawOptions),
minimize: getMinimizeOption(rawOptions, loaderContext),
esModule: typeof rawOptions.esModule === 'undefined' ? false : rawOptions.esModule
};
}
function pluginRunner(plugins) {
return {
process: content => {
const result = {};
for (const plugin of plugins) {
// eslint-disable-next-line no-param-reassign
content = plugin(content, result);
}
result.html = content;
return result;
}
};
}
function getFilter(filter, defaultFilter = null) {
return (attribute, value, resourcePath) => {
if (defaultFilter && !defaultFilter(value)) {
return false;
}
if (typeof filter === 'function') {
return filter(attribute, value, resourcePath);
}
return true;
};
}
const GET_SOURCE_FROM_IMPORT_NAME = '___HTML_LOADER_GET_SOURCE_FROM_IMPORT___';
function getImportCode(html, loaderContext, imports, options) {
if (imports.length === 0) {
return '';
}
const stringifiedHelperRequest = (0, _loaderUtils.stringifyRequest)(loaderContext, require.resolve('./runtime/getUrl.js'));
let code = options.esModule ? `import ${GET_SOURCE_FROM_IMPORT_NAME} from ${stringifiedHelperRequest};\n` : `var ${GET_SOURCE_FROM_IMPORT_NAME} = require(${stringifiedHelperRequest});\n`;
for (const item of imports) {
const {
importName,
source
} = item;
code += options.esModule ? `import ${importName} from ${source};\n` : `var ${importName} = require(${source});\n`;
}
return `// Imports\n${code}`;
}
function getModuleCode(html, replacements) {
let code = JSON.stringify(html) // Invalid in JavaScript but valid HTML
.replace(/[\u2028\u2029]/g, str => str === '\u2029' ? '\\u2029' : '\\u2028');
let replacersCode = '';
for (const item of replacements) {
const {
importName,
replacementName,
unquoted,
hash
} = item;
const getUrlOptions = [].concat(hash ? [`hash: ${JSON.stringify(hash)}`] : []).concat(unquoted ? 'maybeNeedQuotes: true' : []);
const preparedOptions = getUrlOptions.length > 0 ? `, { ${getUrlOptions.join(', ')} }` : '';
replacersCode += `var ${replacementName} = ${GET_SOURCE_FROM_IMPORT_NAME}(${importName}${preparedOptions});\n`;
code = code.replace(new RegExp(replacementName, 'g'), () => `" + ${replacementName} + "`);
}
return `// Module\n${replacersCode}var code = ${code};\n`;
}
function getExportCode(html, options) {
if (options.esModule) {
return `// Exports\nexport default code;`;
}
return `// Exports\nmodule.exports = code;`;
}