Skip to content

Commit

Permalink
refactor: code
Browse files Browse the repository at this point in the history
  • Loading branch information
@alexander-akait
alexander-akait committed Mar 24, 2021
1 parent c5062db commit 263427e
Show file tree
Hide file tree
Showing 6 changed files with 432 additions and 301 deletions.
229 changes: 114 additions & 115 deletions src/plugins/postcss-import-parser.js
View file
Expand Up @@ -8,19 +8,19 @@ import {
webpackIgnoreCommentRegexp,
} from "../utils";

function visitor(result, parsedResults, node, key) {
function parseNode(atRule, key) {
// Convert only top-level @import
if (node.parent.type !== "root") {
if (atRule.parent.type !== "root") {
return;
}

if (
node.raws &&
node.raws.afterName &&
node.raws.afterName.trim().length > 0
atRule.raws &&
atRule.raws.afterName &&
atRule.raws.afterName.trim().length > 0
) {
const lastCommentIndex = node.raws.afterName.lastIndexOf("/*");
const matched = node.raws.afterName
const lastCommentIndex = atRule.raws.afterName.lastIndexOf("/*");
const matched = atRule.raws.afterName
.slice(lastCommentIndex)
.match(webpackIgnoreCommentRegexp);

Expand All @@ -29,7 +29,7 @@ function visitor(result, parsedResults, node, key) {
}
}

const prevNode = node.prev();
const prevNode = atRule.prev();

if (prevNode && prevNode.type === "comment") {
const matched = prevNode.text.match(webpackIgnoreCommentRegexp);
Expand All @@ -40,26 +40,29 @@ function visitor(result, parsedResults, node, key) {
}

// Nodes do not exists - `@import url('http://') :root {}`
if (node.nodes) {
result.warn(
"It looks like you didn't end your @import statement correctly. Child nodes are attached to it.",
{ node }
if (atRule.nodes) {
const error = new Error(
"It looks like you didn't end your @import statement correctly. Child nodes are attached to it."
);

return;
error.node = atRule;

throw error;
}

const { nodes: paramsNodes } = valueParser(node[key]);
const { nodes: paramsNodes } = valueParser(atRule[key]);

// No nodes - `@import ;`
// Invalid type - `@import foo-bar;`
if (
paramsNodes.length === 0 ||
(paramsNodes[0].type !== "string" && paramsNodes[0].type !== "function")
) {
result.warn(`Unable to find uri in "${node.toString()}"`, { node });
const error = new Error(`Unable to find uri in "${atRule.toString()}"`);

return;
error.node = atRule;

throw error;
}

let isStringValue;
Expand All @@ -71,9 +74,11 @@ function visitor(result, parsedResults, node, key) {
} else {
// Invalid function - `@import nourl(test.css);`
if (paramsNodes[0].value.toLowerCase() !== "url") {
result.warn(`Unable to find uri in "${node.toString()}"`, { node });
const error = new Error(`Unable to find uri in "${atRule.toString()}"`);

return;
error.node = atRule;

throw error;
}

isStringValue =
Expand All @@ -84,145 +89,139 @@ function visitor(result, parsedResults, node, key) {
: valueParser.stringify(paramsNodes[0].nodes);
}

url = normalizeUrl(url, isStringValue);

const isRequestable = isUrlRequestable(url);
let prefix;

if (isRequestable) {
const queryParts = url.split("!");

if (queryParts.length > 1) {
url = queryParts.pop();
prefix = queryParts.join("!");
}
}

// Empty url - `@import "";` or `@import url();`
if (url.trim().length === 0) {
result.warn(`Unable to find uri in "${node.toString()}"`, { node });
const error = new Error(`Unable to find uri in "${atRule.toString()}"`);

return;
error.node = atRule;

throw error;
}

const mediaNodes = paramsNodes.slice(1);
let media;

if (mediaNodes.length > 0) {
media = valueParser.stringify(mediaNodes).trim().toLowerCase();
}

parsedResults.push({
node,
url,
isStringValue,
mediaNodes: paramsNodes.slice(1),
});
// eslint-disable-next-line consistent-return
return { atRule, prefix, url, media, isRequestable };
}

const plugin = (options = {}) => {
return {
postcssPlugin: "postcss-import-parser",
prepare(result) {
const parsedResults = [];
const parsedAtRules = [];

return {
AtRule: {
import(atRule) {
visitor(result, parsedResults, atRule, "params");
let parsedAtRule;

try {
parsedAtRule = parseNode(atRule, "params", result);
} catch (error) {
result.warn(error.message, { node: error.node });
}

if (!parsedAtRule) {
return;
}

parsedAtRules.push(parsedAtRule);
},
},
async OnceExit() {
if (parsedResults.length === 0) {
if (parsedAtRules.length === 0) {
return;
}

const imports = new Map();
const tasks = [];

for (const parsedResult of parsedResults) {
const { node, url, isStringValue, mediaNodes } = parsedResult;
const resolvedAtRules = await Promise.all(
parsedAtRules.map(async (parsedAtRule) => {
const {
atRule,
isRequestable,
prefix,
url,
media,
} = parsedAtRule;

if (options.filter) {
const needKeep = await options.filter(url, media);

if (!needKeep) {
return null;
}
}

let normalizedUrl = url;
let prefix = "";
atRule.remove();

const isRequestable = isUrlRequestable(normalizedUrl);
if (isRequestable) {
const request = requestify(url, options.rootContext);

if (isRequestable) {
const queryParts = normalizedUrl.split("!");
const { resolver, context } = options;
const resolvedUrl = await resolveRequests(resolver, context, [
...new Set([request, url]),
]);

if (queryParts.length > 1) {
normalizedUrl = queryParts.pop();
prefix = queryParts.join("!");
return { url: resolvedUrl, media, prefix, isRequestable };
}

normalizedUrl = normalizeUrl(normalizedUrl, isStringValue);

// Empty url after normalize - `@import '\
// \
// \
// ';
if (normalizedUrl.trim().length === 0) {
result.warn(`Unable to find uri in "${node.toString()}"`, {
node,
});
return { url, media, prefix, isRequestable };
})
);

// eslint-disable-next-line no-continue
continue;
}
}
const urlToNameMap = new Map();

let media;
for (let index = 0; index <= resolvedAtRules.length - 1; index++) {
const resolvedAtRule = resolvedAtRules[index];

if (mediaNodes.length > 0) {
media = valueParser.stringify(mediaNodes).trim().toLowerCase();
if (!resolvedAtRule) {
// eslint-disable-next-line no-continue
continue;
}

tasks.push(
(async () => {
if (options.filter) {
const processURL = await options.filter(normalizedUrl, media);
if (!processURL) {
return null;
}
}

node.remove();

if (isRequestable) {
const request = requestify(
normalizedUrl,
options.rootContext
);

const { resolver, context } = options;
const resolvedUrl = await resolveRequests(resolver, context, [
...new Set([request, normalizedUrl]),
]);
const { url, isRequestable, media } = resolvedAtRule;

return { url: resolvedUrl, media, prefix, isRequestable };
}

return { url, media, prefix, isRequestable };
})()
);
}
if (!isRequestable) {
options.api.push({ url, media, index });

const results = await Promise.all(tasks);

for (let index = 0; index <= results.length - 1; index++) {
const item = results[index];

if (item === null) {
// eslint-disable-next-line no-continue
continue;
}

const { url, isRequestable, media } = item;

if (isRequestable) {
const { prefix } = item;
const newUrl = prefix ? `${prefix}!${url}` : url;
const importKey = newUrl;
let importName = imports.get(importKey);
const { prefix } = resolvedAtRule;
const newUrl = prefix ? `${prefix}!${url}` : url;
let importName = urlToNameMap.get(newUrl);

if (!importName) {
importName = `___CSS_LOADER_AT_RULE_IMPORT_${imports.size}___`;
imports.set(importKey, importName);
if (!importName) {
importName = `___CSS_LOADER_AT_RULE_IMPORT_${urlToNameMap.size}___`;
urlToNameMap.set(newUrl, importName);

options.imports.push({
importName,
url: options.urlHandler(newUrl),
index,
});
}

options.api.push({ importName, media, index });

// eslint-disable-next-line no-continue
continue;
options.imports.push({
importName,
url: options.urlHandler(newUrl),
index,
});
}

options.api.push({ url, media, index });
options.api.push({ importName, media, index });
}
},
};
Expand Down

0 comments on commit 263427e

Please sign in to comment.